configure.ac: release 4.3

Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>

.gitignore

@@ -17,6 +17,7 @@ Makefile.in
 /ABOUT-NLS
 /aclocal.m4
 /autom4te.cache
+/compile
 /config.guess
 /config.h
 /config.h.in

NEWS

@@ -1,6 +1,207 @@
 $Id$
 
-shadow-4.1.4.1 -> shadow-4.1.4.2						2009-07-24
+shadow-4.1.5.1 -> shadow-4.2					UNRELEASED
+
+*** general
+  * Handle libc whose crypt() returns NULL when passed a salt that
+    violates specs or system requirements (e.g. FIPS140). This is needed
+    with glibc/eglibc 2.17 for tools checking passwords (passwd (non PAM
+    enabled) or newgrp), and for tools generating encrypted passwords
+    (chgpasswd, chpasswd, or gpasswd when non PAM enabled or when a fixed
+    crypt method is requested on the command line, and newusers, or passwd
+    in their non PAM enabled versions)
+  * Fix segfault when reading groups split on multiple lines. This impacts
+    most user/group management tools when MAX_MEMBERS_PER_GROUP is set.
+
+- su
+  * When su receives a signal (SIGTERM, or SIGINT/SIGQUIT in non
+    interactive mode), kill the child process group, rather than just the 
+    immediate child.
+  * Fix segmentation faults for users without a proper home or shell in
+    their passwd entries.
+
+- login
+  * Fix segmentation faults for users without a proper home or shell in
+    their passwd entries.
+
+*** documentation
+  * Fixed useradd man page (--home-dir option, instead of --home).
+
+*** translation
+  * Updated Russian translation.
+  * Updated German man pages translation.
+  * Fixed gshadow Japanese man page translation.
+
+shadow-4.1.5 -> shadow-4.1.5.1					2012-05-25
+
+- login
+  * Log into utmp(x) when PAM is enabled, but do not log into wtmp.
+    This complete pam_lastlog which logs into wtmp and in into utmp(x).
+- su
+  * non PAM enabled versions: do not fail if su is called without a
+    controlling terminal.
+- userdel
+  * Fix segfault when userdel removes the user's group.
+
+*** documentation
+  * .so links now point to paths relative to the top-level manual hierarchy
+
+*** translation
+  * Updated French man pages translation.
+  * Updated German man pages translation.
+  * Updated Polish man pages translation. (logoutd.8)
+
+shadow-4.1.4.3 -> shadow-4.1.5					2012-02-12
+
+*** security
+  * su -c could be abused by the executed command to invoke commands with
+    the caller privileges. See below. (CVE-2005-4890)
+
+*** general
+  * report usage error to stderr, but report usage help to stdout (and return
+    zero) when explicitly requested (e.g. with --help).
+  * initial support for tcb (http://openwall.com/tcb/) for useradd,
+    userdel, usermod, chage, pwck, vipw.
+  * Added support for ACLs and Extended Attributes in useradd and usermod.
+    Support shall be enabled with the new --with-acl or --with-attr
+    configure options.
+  * Added diagnosis for lock failures.
+  * use libsemanage instead of the semanage tool.
+
+- chage
+  * Add --root option.
+- chfn
+  * Add --root option.
+- chgpasswd
+  * When the gshadow file exists but there are no gshadow entries, an entry
+    is created if the password is changed and group requires a
+    shadow entry.
+  * Add --root option.
+- chpasswd
+  * PAM enabled versions: restore the -e option to allow restoring
+    passwords without knowing those passwords. Restore together the -m
+    and -c options. (These options were removed in shadow-4.1.4 on PAM
+    enabled versions)
+  * When the shadow file exists but there are no shadow entries, an entry
+    is created if the password is changed and passwd requires a
+    shadow entry.
+  * Add --root option.
+- chsh
+  * Add --root option.
+- faillog
+  * The -l, -m, -r, -t options only act on the existing users, unless -a is
+    specified.
+  * Add --root option.
+- gpasswd
+  * Add --root option.
+- groupadd
+  * Add --root option.
+- groupdel
+  * Add --root option.
+- groupmems
+  * Fix parsing of gshadow entries.
+  * Add --root option.
+- groupmod
+  * Fixed groupmod when configured with --enable-account-tools-setuid.
+  * When the gshadow file exists but there are no gshadow entries, an entry
+    is created if the password is changed and group requires a
+    shadow entry.
+  * Add --root option.
+- grpck
+  * Add --root option.
+  * NIS entries were dropped by -s (sort).
+- grpconv
+  * Add --root option.
+- grpunconv
+  * Add --root option.
+- lastlog
+  * Add --root option.
+- login
+  * Fixed limits support (non PAM enabled versions only)
+  * Added support for infinite limits and group based limits (non PAM
+    enabled versions only)
+  * Fixed infinite loop when CONSOLE is configured with a colon-separated
+    list of TTYs.
+  * Fixed warning and support for CONSOLE_GROUPS for users member of more
+    than 16 groups.
+  * Do not log into utmp(x) or wtmp when PAM is enabled. This is done by
+    pam_lastlog.
+- newgrp, sg
+  * Fix parsing of gshadow entries.
+- newusers
+  * Add --root option.
+- passwd
+  * Add --root option.
+- pwpck
+  * NIS entries were dropped by -s (sort).
+  * Add --root option.
+- pwconv
+  * Add --root option.
+- pwunconv
+  * Add --root option.
+- useradd
+  * If the skeleton directory contained hardlinked files, copies of the
+    hardlink were removed from the skeleton directory.
+  * Add --root option.
+- userdel
+  * Check the existence of the user's mail spool before trying to remove
+    it. If it does not exist, a warning is issued, but no failure.
+  * Do not remove a group with the same name as the user (usergroup) if
+    this group isn't the user's primary group.
+  * Add --root option.
+  * Add --selinux-user option.
+- usermod
+  * Accept options in any order (username not necessarily at the end)
+  * When the shadow file exists but there are no shadow entries, an entry
+    is created if the password is changed and passwd requires a
+    shadow entry, or if aging features are used (-e or -f).
+  * Add --root option.
+- su
+  * Document the su exit values.
+  * When su receives a signal, wait for the child to terminate (after
+    sending a SIGTERM), and kill it only if it did not terminate by itself.
+    No delay will be enforced if the child cooperates.
+  * Default ENV_SUPATH is /sbin:/bin:/usr/sbin:/usr/bin
+  * Fixed infinite loop when CONSOLE is configured with a colon-separated
+    list of TTYs.
+  * Fixed warning and support for CONSOLE_GROUPS for users member of more
+    than 16 groups.
+  * Do not forward the controlling terminal to commands executed with -c.
+    This prevents tty hijacking which could lead to execution with the
+    caller's privileges.
+  * Close PAM sessions as root. This will be more friendly to PAM modules
+    like pam_mount or pam_systemd.
+  * Added support for PAM modules which change PAM_USER.
+
+*** translation
+  * Updated Brazilian Portuguese translation.
+  * Updated Catalan translation.
+  * Updated Czech translation.
+  * Updated Danish translation.
+  * New Danish man pages translation.
+  * Updated French translation.
+  * Updated French man pages translation.
+  * Updated German translation.
+  * Updated German man pages translation.
+  * Updated Greek translation.
+  * Updated Italian man pages translation.
+  * Updated Japanese translation.
+  * Updated Kazakh translation.
+  * Updated Norwegian Bokmål translation.
+  * Updated Portuguese translation.
+  * Updated Russian translation.
+  * Updated Simplified Chinese translation.
+  * Updated Simplified Chinese man pages translation.
+  * Updated Swedish translation.
+  * Updated Vietnamese translation.
+
+shadow-4.1.4.2 -> shadow-4.1.4.3						2011-02-15
+
+*** security
+- CVE-2011-0721: An insufficient input sanitation in chfn can be exploited
+  to create users or groups in a NIS environment.
+
+shadow-4.1.4.1 -> shadow-4.1.4.2					2009-07-24
 
 - general
   * Improved support for large groups (impacts most user/group management
@@ -310,7 +511,7 @@ shadow-4.1.0 -> shadow-4.1.1						02-04-2008
     faillog faster.
 - gpasswd
   * Fix failures when the gshadow file is not present.
-  * When a password is moved to the gshadow file, use "x" instead of "x"
+  * When a password is moved to the gshadow file, use "x" instead of "!"
     to indicate that the password is shadowed (consistency with grpconv).
   * Make sure the group and gshadow files are unlocked on exit.
 - groupadd

README

@@ -37,7 +37,7 @@ S/Key support:
 Authors and contributors
 ========================
 
-Thanks to at least the following people for sending me patches, bug
+Thanks to at least the following people for sending patches, bug
 reports and various comments.  This list may be incomplete, I received
 a lot of mail...
 
@@ -69,6 +69,7 @@ Greg Mortensen <loki@world.std.com>
 Guido van Rooij
 Guy Maor <maor@debian.org>
 Hrvoje Dogan <hdogan@bjesomar.srce.hr>
+Jakub Hrozek <jhrozek@redhat.com>
 Janos Farkas <chexum@bankinf.banki.hu>
 Jay Soffian <jay@lw.net>
 Jesse Thilo <Jesse.Thilo@pobox.com>
@@ -80,6 +81,7 @@ Joshua Cowan <jcowan@hermit.reslife.okstate.edu>
 Judd Bourgeois <shagboy@bluesky.net>
 Juergen Heinzl <unicorn@noris.net>
 Juha Virtanen <jiivee@iki.fi>
+Julian Pidancet <julian.pidancet@gmail.com>
 Julianne Frances Haugh <jockgrrl@ix.netcom.com>
 Leonard N. Zubkoff <lnz@dandelion.com>
 Luca Berra <bluca@www.polimi.it>
@@ -95,10 +97,12 @@ Mike Pakovic <mpakovic@users.southeast.net>
 Nicolas François <nicolas.francois@centraliens.net>
 Nikos Mavroyanopoulos <nmav@i-net.paiko.gr>
 Pavel Machek <pavel@bug.ucw.cz>
+Peter Vrabec <pvrabec@redhat.com>
 Phillip Street
 Rafał Maszkowski <rzm@icm.edu.pl>
 Rani Chouha <ranibey@smartec.com>
 Sami Kerola <kerolasa@rocketmail.com>
+Scott Garman <scott.a.garman@intel.com>
 Sebastian Rick Rijkers <srrijkers@gmail.com>
 Seraphim Mellos <mellos@ceid.upatras.gr>
 Shane Watts <shane@nexus.mlckew.edu.au>

TODO

@@ -1,3 +1,10 @@
+ * Create a common usage function that'd take the array of     
+   long options and an array of descriptions and output that so things would
+   be standardized across the utils.
+   Usage strings should be normalized and split first.
+   Investigate optparse.
+
+
 /etc/default/useradd
  * GROUP=1000 should accept a group name.
 
@@ -108,7 +115,13 @@ ALL:
     entry (with a password).
   - Add check to move passwd passwords to shadow if there is a shadow
     file.
+  - Support an alternative /etc/tcb directory as second parameter.
+  - add options -g / -G to specify alternative group / gshadow files
 
 - su
   - add a login.defs configuration parameter to add variables to keep in
-    the environment with "su -l" (TERM/TERMCOLOR/...
+    the environment with "su -l" (TERM/TERMCOLOR/...)
+
+- vipw
+  - set ACLs and XATTRs on the temporary file (and backups?)
+  - vipw + selinux -> use lib/selinux.c

autogen.sh

@@ -1,5 +1,7 @@
 #! /bin/sh
+
 autoreconf -v -f --install || exit 1
+
 ./configure \
 	CFLAGS="-O2 -Wall" \
 	--enable-man \

configure.ac

@@ -1,6 +1,6 @@
 dnl Process this file with autoconf to produce a configure script.
 AC_INIT
-AM_INIT_AUTOMAKE(shadow, 4.1.4.2)
+AM_INIT_AUTOMAKE(shadow, 4.3)
 AC_CONFIG_HEADERS([config.h])
 
 dnl Some hacks...
@@ -19,7 +19,6 @@ AC_PROG_CC
 AC_ISC_POSIX
 AC_PROG_LN_S
 AC_PROG_YACC
-AM_C_PROTOTYPES
 AM_PROG_LIBTOOL
 
 dnl Checks for libraries.
@@ -33,7 +32,8 @@ AC_HEADER_STDBOOL
 AC_CHECK_HEADERS(errno.h fcntl.h limits.h unistd.h sys/time.h utmp.h \
 	utmpx.h termios.h termio.h sgtty.h sys/ioctl.h syslog.h paths.h \
 	utime.h ulimit.h sys/resource.h gshadow.h lastlog.h \
-	locale.h rpc/key_prot.h netdb.h)
+	locale.h rpc/key_prot.h netdb.h acl/libacl.h attr/libattr.h \
+	attr/error_context.h)
 
 dnl shadow now uses the libc's shadow implementation
 AC_CHECK_HEADER([shadow.h],,[AC_MSG_ERROR([You need a libc with shadow.h])])
@@ -41,7 +41,8 @@ AC_CHECK_HEADER([shadow.h],,[AC_MSG_ERROR([You need a libc with shadow.h])])
 AC_CHECK_FUNCS(l64a fchmod fchown fsync futimes getgroups gethostname getspnam \
 	gettimeofday getusershell getutent initgroups lchown lckpwdf lstat \
 	lutimes memcpy memset setgroups sigaction strchr updwtmp updwtmpx innetgr \
-	getpwnam_r getpwuid_r getgrnam_r getgrgid_r getspnam_r getaddrinfo)
+	getpwnam_r getpwuid_r getgrnam_r getgrgid_r getspnam_r getaddrinfo \
+	ruserok)
 AC_SYS_LARGEFILE
 
 dnl Checks for typedefs, structures, and compiler characteristics.
@@ -112,7 +113,6 @@ AC_REPLACE_FUNCS(sgetgrent sgetpwent sgetspent)
 AC_REPLACE_FUNCS(snprintf strcasecmp strdup strerror strstr)
 
 AC_CHECK_FUNC(setpgrp)
-AC_FUNC_SETPGRP
 
 if test "$ac_cv_header_shadow_h" = "yes"; then
 	AC_CACHE_CHECK(for working shadow group support,
@@ -195,8 +195,10 @@ AC_DEFINE_UNQUOTED(PASSWD_PROGRAM, "$shadow_cv_passwd_dir/passwd",
 
 dnl XXX - quick hack, should disappear before anyone notices :).
 AC_DEFINE(USE_SYSLOG, 1, [Define to use syslog().])
-AC_DEFINE(RLOGIN, 1, [Define if login should support the -r flag for rlogind.])
+if test "$ac_cv_func_ruserok" = "yes"; then
-AC_DEFINE(RUSEROK, 0, [Define to the ruserok() "success" return value (0 or 1).])
+	AC_DEFINE(RLOGIN, 1, [Define if login should support the -r flag for rlogind.])
+	AC_DEFINE(RUSEROK, 0, [Define to the ruserok() "success" return value (0 or 1).])
+fi
 
 AC_ARG_ENABLE(shadowgrp,
 	[AC_HELP_STRING([--enable-shadowgrp], [enable shadow group support @<:@default=yes@:>@])],
@@ -238,6 +240,13 @@ AC_ARG_ENABLE(utmpx,
 	[enable_utmpx="no"]
 )
 
+AC_ARG_ENABLE(subordinate-ids,
+	[AC_HELP_STRING([--enable-subordinate-ids],
+		[support subordinate ids @<:@default=yes@:>@])],
+	[enable_subids="${enableval}"],
+	[enable_subids="maybe"]
+)
+
 AC_ARG_WITH(audit, 
 	[AC_HELP_STRING([--with-audit], [use auditing support @<:@default=yes if found@:>@])],
 	[with_audit=$withval], [with_audit=maybe])
@@ -247,11 +256,20 @@ AC_ARG_WITH(libpam,
 AC_ARG_WITH(selinux,
 	[AC_HELP_STRING([--with-selinux], [use SELinux support @<:@default=yes if found@:>@])],
 	[with_selinux=$withval], [with_selinux=maybe])
+AC_ARG_WITH(acl,
+	[AC_HELP_STRING([--with-acl], [use ACL support @<:@default=yes if found@:>@])],
+	[with_acl=$withval], [with_acl=maybe])
+AC_ARG_WITH(attr,
+	[AC_HELP_STRING([--with-attr], [use Extended Attribute support @<:@default=yes if found@:>@])],
+	[with_attr=$withval], [with_attr=maybe])
 AC_ARG_WITH(skey,
 	[AC_HELP_STRING([--with-skey], [use S/Key support @<:@default=no@:>@])],
 	[with_skey=$withval], [with_skey=no])
+AC_ARG_WITH(tcb,
+	[AC_HELP_STRING([--with-tcb], [use tcb support (incomplete) @<:@default=yes if found@:>@])],
+	[with_tcb=$withval], [with_tcb=maybe])
 AC_ARG_WITH(libcrack,
-	[AC_HELP_STRING([--with-libcrack], [use libcrack @<:@default=yes if found and if PAM not enabled@:>@])],
+	[AC_HELP_STRING([--with-libcrack], [use libcrack @<:@default=no@:>@])],
 	[with_libcrack=$withval], [with_libcrack=no])
 AC_ARG_WITH(sha-crypt,
 	[AC_HELP_STRING([--with-sha-crypt], [allow the SHA256 and SHA512 password encryption algorithms @<:@default=yes@:>@])],
@@ -313,10 +331,81 @@ if test "$enable_man" = "yes"; then
 fi
 AM_CONDITIONAL(ENABLE_REGENERATE_MAN, test "x$enable_man" != "xno")
 
+if test "$enable_subids" != "no"; then
+	dnl
+	dnl FIXME: check if 32 bit UIDs/GIDs are supported by libc
+	dnl
+	AC_CHECK_SIZEOF([uid_t],, [#include "sys/types.h"])
+	AC_CHECK_SIZEOF([gid_t],, [#include "sys/types.h"])
+
+	if test "$ac_cv_sizeof_uid_t" -ge 4 && test "$ac_cv_sizeof_gid_t" -ge 4; then
+		AC_DEFINE(ENABLE_SUBIDS, 1, [Define to support the subordinate IDs.])
+		enable_subids="yes"
+	else
+		if test "x$enable_subids" = "xyes"; then
+			AC_MSG_ERROR([Cannot enable support the subordinate IDs on systems where gid_t or uid_t has less than 32 bits])
+		fi
+		enable_subids="no"
+	fi
+fi
+AM_CONDITIONAL(ENABLE_SUBIDS, test "x$enable_subids" != "xno")
+
 AC_SUBST(LIBCRYPT)
 AC_CHECK_LIB(crypt, crypt, [LIBCRYPT=-lcrypt],
 	[AC_MSG_ERROR([crypt() not found])])
 
+AC_SUBST(LIBACL)
+if test "$with_acl" != "no"; then
+	AC_CHECK_HEADERS(acl/libacl.h attr/error_context.h, [acl_header="yes"], [acl_header="no"])
+	if test "$acl_header$with_acl" = "noyes" ; then
+		AC_MSG_ERROR([acl/libacl.h or attr/error_context.h is missing])
+	elif test "$acl_header" = "yes" ; then
+		AC_CHECK_LIB(acl, perm_copy_file,
+		             [AC_CHECK_LIB(acl, perm_copy_fd,
+		                           [acl_lib="yes"],
+		                           [acl_lib="no"])],
+		             [acl_lib="no"])
+		if test "$acl_lib$with_acl" = "noyes" ; then
+			AC_MSG_ERROR([libacl not found])
+		elif test "$acl_lib" = "no" ; then
+			with_acl="no"
+		else
+			AC_DEFINE(WITH_ACL, 1,
+			          [Build shadow with ACL support])
+			LIBACL="-lacl"
+			with_acl="yes"
+		fi
+	else
+		with_acl="no"
+	fi
+fi
+
+AC_SUBST(LIBATTR)
+if test "$with_attr" != "no"; then
+	AC_CHECK_HEADERS(attr/libattr.h attr/error_context.h, [attr_header="yes"], [attr_header="no"])
+	if test "$attr_header$with_attr" = "noyes" ; then
+		AC_MSG_ERROR([attr/libattr.h or attr/error_context.h is missing])
+	elif test "$attr_header" = "yes" ; then
+		AC_CHECK_LIB(attr, attr_copy_file,
+		             [AC_CHECK_LIB(attr, attr_copy_fd,
+		                           [attr_lib="yes"],
+		                           [attr_lib="no"])],
+		             [attr_lib="no"])
+		if test "$attr_lib$with_attr" = "noyes" ; then
+			AC_MSG_ERROR([libattr not found])
+		elif test "$attr_lib" = "no" ; then
+			with_attr="no"
+		else
+			AC_DEFINE(WITH_ATTR, 1,
+			          [Build shadow with Extended Attributes support])
+			LIBATTR="-lattr"
+			with_attr="yes"
+		fi
+	else
+		with_attr="no"
+	fi
+fi
+
 AC_SUBST(LIBAUDIT)
 if test "$with_audit" != "no"; then
 	AC_CHECK_HEADER(libaudit.h, [audit_header="yes"], [audit_header="no"])
@@ -361,28 +450,65 @@ if test "$with_libcrack" = "yes"; then
 fi
 
 AC_SUBST(LIBSELINUX)
+AC_SUBST(LIBSEMANAGE)
 if test "$with_selinux" != "no"; then
 	AC_CHECK_HEADERS(selinux/selinux.h, [selinux_header="yes"], [selinux_header="no"])
 	if test "$selinux_header$with_selinux" = "noyes" ; then
 		AC_MSG_ERROR([selinux/selinux.h is missing])
-	elif test "$selinux_header" = "yes" ; then
+	fi
-		AC_CHECK_LIB(selinux, is_selinux_enabled,
+
-		             [selinux_lib="yes"], [selinux_lib="no"])
+	AC_CHECK_HEADERS(semanage/semanage.h, [semanage_header="yes"], [semanage_header="no"])
+	if test "$semanage_header$with_selinux" = "noyes" ; then
+		AC_MSG_ERROR([semanage/semanage.h is missing])
+	fi
+
+	if test "$selinux_header$semanage_header" = "yesyes" ; then
+		AC_CHECK_LIB(selinux, is_selinux_enabled, [selinux_lib="yes"], [selinux_lib="no"])
 		if test "$selinux_lib$with_selinux" = "noyes" ; then
 			AC_MSG_ERROR([libselinux not found])
-		elif test "$selinux_lib" = "no" ; then
+		fi
-			with_selinux="no"
+
-		else
+		AC_CHECK_LIB(semanage, semanage_connect, [semanage_lib="yes"], [semanage_lib="no"])
+		if test "$semanage_lib$with_selinux" = "noyes" ; then
+			AC_MSG_ERROR([libsemanage not found])
+		fi
+
+		if test "$selinux_lib$semanage_lib" == "yesyes" ; then
 			AC_DEFINE(WITH_SELINUX, 1,
 			          [Build shadow with SELinux support])
 			LIBSELINUX="-lselinux"
+			LIBSEMANAGE="-lsemanage"
 			with_selinux="yes"
+		else
+			with_selinux="no"
 		fi
 	else
 		with_selinux="no"
 	fi
 fi
 
+AC_SUBST(LIBTCB)
+if test "$with_tcb" != "no"; then
+	AC_CHECK_HEADERS(tcb.h, [tcb_header="yes"], [tcb_header="no"])
+	if test "$tcb_header$with_tcb" = "noyes" ; then
+		AC_MSG_ERROR([tcb.h is missing])
+	elif test "$tcb_header" = "yes" ; then
+		AC_CHECK_LIB(tcb, tcb_is_suspect, [tcb_lib="yes"], [tcb_lib="no"])
+		if test "$tcb_lib$with_tcb" = "noyes" ; then
+			AC_MSG_ERROR([libtcb not found])
+		elif test "$tcb_lib" = "no" ; then
+			with_tcb="no"
+		else
+			AC_DEFINE(WITH_TCB, 1, [Build shadow with tcb support (incomplete)])
+			LIBTCB="-ltcb"
+			with_tcb="yes"
+		fi
+	else
+		with_tcb="no"
+	fi
+fi
+AM_CONDITIONAL(WITH_TCB, test x$with_tcb = xyes)
+
 AC_SUBST(LIBPAM)
 if test "$with_libpam" != "no"; then
 	AC_CHECK_LIB(pam, pam_start,
@@ -503,8 +629,9 @@ AC_CONFIG_FILES([
 	doc/Makefile
 	man/Makefile
 	man/config.xml
-	man/po/Makefile.in
+	man/po/Makefile
 	man/cs/Makefile
+	man/da/Makefile
 	man/de/Makefile
 	man/es/Makefile
 	man/fi/Makefile
@@ -541,8 +668,12 @@ if test "$with_libpam" = "yes"; then
 echo "	suid account management tools:	$enable_acct_tools_setuid"
 fi
 echo "	SELinux support:		$with_selinux"
+echo "	ACL support:			$with_acl"
+echo "	Extended Attributes support:	$with_attr"
+echo "	tcb support (incomplete):	$with_tcb"
 echo "	shadow group support:		$enable_shadowgrp"
 echo "	S/Key support:			$with_skey"
 echo "	SHA passwords encryption:	$with_sha_crypt"
 echo "	nscd support:			$with_nscd"
+echo "	subordinate IDs support:	$enable_subids"
 echo

etc/login.defs

@@ -6,18 +6,18 @@
 
 #
 # Delay in seconds before being allowed another attempt after a login failure
-# Note: When PAM is used, some modules may enfore a minimal delay (e.g.
+# Note: When PAM is used, some modules may enforce a minimum delay (e.g.
-#       pam_unix enforces a 2s delay)
+#       pam_unix(8) enforces a 2s delay)
 #
 FAIL_DELAY		3
 
 #
-# Enable logging and display of /var/log/faillog login failure info.
+# Enable logging and display of /var/log/faillog login(1) failure info.
 #
 FAILLOG_ENAB		yes
 
 #
-# Enable display of unknown usernames when login failures are recorded.
+# Enable display of unknown usernames when login(1) failures are recorded.
 #
 LOG_UNKFAIL_ENAB	no
 
@@ -27,7 +27,7 @@ LOG_UNKFAIL_ENAB	no
 LOG_OK_LOGINS		no
 
 #
-# Enable logging and display of /var/log/lastlog login time info.
+# Enable logging and display of /var/log/lastlog login(1) time info.
 #
 LASTLOG_ENAB		yes
 
@@ -50,13 +50,13 @@ OBSCURE_CHECKS_ENAB	yes
 PORTTIME_CHECKS_ENAB	yes
 
 #
-# Enable setting of ulimit, umask, and niceness from passwd gecos field.
+# Enable setting of ulimit, umask, and niceness from passwd(5) gecos field.
 #
 QUOTAS_ENAB		yes
 
 #
-# Enable "syslog" logging of su activity - in addition to sulog file logging.
+# Enable "syslog" logging of su(1) activity - in addition to sulog file logging.
-# SYSLOG_SG_ENAB does the same for newgrp and sg.
+# SYSLOG_SG_ENAB does the same for newgrp(1) and sg(1).
 #
 SYSLOG_SU_ENAB		yes
 SYSLOG_SG_ENAB		yes
@@ -64,13 +64,13 @@ SYSLOG_SG_ENAB		yes
 #
 # If defined, either full pathname of a file containing device names or
 # a ":" delimited list of device names.  Root logins will be allowed only
-# upon these devices.
+# from these devices.
 #
 CONSOLE		/etc/securetty
 #CONSOLE	console:tty01:tty02:tty03:tty04
 
 #
-# If defined, all su activity is logged to this file.
+# If defined, all su(1) activity is logged to this file.
 #
 #SULOG_FILE	/var/log/sulog
 
@@ -82,33 +82,33 @@ MOTD_FILE	/etc/motd
 #MOTD_FILE	/etc/motd:/usr/lib/news/news-motd
 
 #
-# If defined, this file will be output before each login prompt.
+# If defined, this file will be output before each login(1) prompt.
 #
 #ISSUE_FILE	/etc/issue
 
 #
 # If defined, file which maps tty line to TERM environment parameter.
-# Each line of the file is in a format something like "vt100  tty01".
+# Each line of the file is in a format similar to "vt100  tty01".
 #
 #TTYTYPE_FILE	/etc/ttytype
 
 #
-# If defined, login failures will be logged here in a utmp format.
+# If defined, login(1) failures will be logged here in a utmp format.
-# last, when invoked as lastb, will read /var/log/btmp, so...
+# last(1), when invoked as lastb(1), will read /var/log/btmp, so...
 #
 FTMP_FILE	/var/log/btmp
 
 #
-# If defined, name of file whose presence which will inhibit non-root
+# If defined, name of file whose presence will inhibit non-root
-# logins.  The contents of this file should be a message indicating
+# logins.  The content of this file should be a message indicating
 # why logins are inhibited.
 #
 NOLOGINS_FILE	/etc/nologin
 
 #
 # If defined, the command name to display when running "su -".  For
-# example, if this is defined as "su" then a "ps" will display the
+# example, if this is defined as "su" then ps(1) will display the
-# command is "-su".  If not defined, then "ps" would display the
+# command as "-su".  If not defined, then ps(1) will display the
 # name of the shell actually being run, e.g. something like "-sh".
 #
 SU_NAME		su
@@ -158,10 +158,10 @@ ENV_PATH	PATH=/bin:/usr/bin
 #	TTYGROUP	Login tty will be assigned this group ownership.
 #	TTYPERM		Login tty will be set to this permission.
 #
-# If you have a "write" program which is "setgid" to a special group
+# If you have a write(1) program which is "setgid" to a special group
-# which owns the terminals, define TTYGROUP to the group number and
+# which owns the terminals, define TTYGROUP as the number of such group
-# TTYPERM to 0620.  Otherwise leave TTYGROUP commented out and assign
+# and TTYPERM as 0620.  Otherwise leave TTYGROUP commented out and
-# TTYPERM to either 622 or 600.
+# set TTYPERM to either 622 or 600.
 #
 TTYGROUP	tty
 TTYPERM		0600
@@ -183,12 +183,13 @@ ERASECHAR	0177
 KILLCHAR	025
 #ULIMIT		2097152
 
-# Default initial "umask" value for non-PAM enabled systems.
+# Default initial "umask" value used by login(1) on non-PAM enabled systems.
-# UMASK is also used by useradd and newusers to set the mode of new home
+# Default "umask" value for pam_umask(8) on PAM enabled systems.
-# directories.
+# UMASK is also used by useradd(8) and newusers(8) to set the mode for new
+# home directories.
 # 022 is the default value, but 027, or even 077, could be considered
-# better for privacy. There is no One True Answer here: each sysadmin
+# for increased privacy. There is no One True Answer here: each sysadmin
-# must make up her mind.
+# must make up his/her mind.
 UMASK		022
 
 #
@@ -213,35 +214,43 @@ PASS_WARN_AGE	7
 SU_WHEEL_ONLY	no
 
 #
-# If compiled with cracklib support, where are the dictionaries
+# If compiled with cracklib support, sets the path to the dictionaries
 #
 CRACKLIB_DICTPATH	/var/cache/cracklib/cracklib_dict
 
 #
-# Min/max values for automatic uid selection in useradd
+# Min/max values for automatic uid selection in useradd(8)
 #
 UID_MIN			 1000
 UID_MAX			60000
 # System accounts
 SYS_UID_MIN		  101
 SYS_UID_MAX		  999
+# Extra per user uids
+SUB_UID_MIN		   100000
+SUB_UID_MAX		600100000
+SUB_UID_COUNT		    65536
 
 #
-# Min/max values for automatic gid selection in groupadd
+# Min/max values for automatic gid selection in groupadd(8)
 #
 GID_MIN			 1000
 GID_MAX			60000
 # System accounts
 SYS_GID_MIN		  101
 SYS_GID_MAX		  999
+# Extra per user group ids
+SUB_GID_MIN		   100000
+SUB_GID_MAX		600100000
+SUB_GID_COUNT		    65536
 
 #
-# Max number of login retries if password is bad
+# Max number of login(1) retries if password is bad
 #
 LOGIN_RETRIES		5
 
 #
-# Max time in seconds for login
+# Max time in seconds for login(1)
 #
 LOGIN_TIMEOUT		60
 
@@ -263,12 +272,12 @@ PASS_ALWAYS_WARN	yes
 #PASS_MAX_LEN		8
 
 #
-# Require password before chfn/chsh can make any changes.
+# Require password before chfn(1)/chsh(1) can make any changes.
 #
 CHFN_AUTH		yes
 
 #
-# Which fields may be changed by regular users using chfn - use
+# Which fields may be changed by regular users using chfn(1) - use
 # any combination of letters "frwh" (full name, room number, work
 # phone, home phone).  If not defined, no changes are allowed.
 # For backward compatibility, "yes" = "rwh" and "no" = "frwh".
@@ -293,13 +302,13 @@ CHFN_RESTRICT		rwh
 # Note: If you use PAM, it is recommended to use a value consistent with
 # the PAM modules configuration.
 #
-# This variable is deprecated. You should use ENCRYPT_METHOD.
+# This variable is deprecated. You should use ENCRYPT_METHOD instead.
 #
 #MD5_CRYPT_ENAB	no
 
 #
 # Only works if compiled with ENCRYPTMETHOD_SELECT defined:
-# If set to MD5 , MD5-based algorithm will be used for encrypting password
+# If set to MD5, MD5-based algorithm will be used for encrypting password
 # If set to SHA256, SHA256-based algorithm will be used for encrypting password
 # If set to SHA512, SHA512-based algorithm will be used for encrypting password
 # If set to DES, DES-based algorithm will be used for encrypting password (default)
@@ -314,12 +323,12 @@ CHFN_RESTRICT		rwh
 # Only works if ENCRYPT_METHOD is set to SHA256 or SHA512.
 #
 # Define the number of SHA rounds.
-# With a lot of rounds, it is more difficult to brute forcing the password.
+# With a lot of rounds, it is more difficult to brute-force the password.
-# But note also that it more CPU resources will be needed to authenticate
+# However, more CPU resources will be needed to authenticate users if
-# users.
+# this value is increased.
 #
 # If not specified, the libc will choose the default number of rounds (5000).
-# The values must be inside the 1000-999999999 range.
+# The values must be within the 1000-999999999 range.
 # If only one of the MIN or MAX values is set, then this value will be used.
 # If MIN > MAX, the highest value will be used.
 #
@@ -328,18 +337,18 @@ CHFN_RESTRICT		rwh
 
 #
 # List of groups to add to the user's supplementary group set
-# when logging in on the console (as determined by the CONSOLE
+# when logging in from the console (as determined by the CONSOLE
 # setting).  Default is none.
 #
 # Use with caution - it is possible for users to gain permanent
-# access to these groups, even when not logged in on the console.
+# access to these groups, even when not logged in from the console.
 # How to do it is left as an exercise for the reader...
 #
 #CONSOLE_GROUPS		floppy:audio:cdrom
 
 #
 # Should login be allowed if we can't cd to the home directory?
-# Default in no.
+# Default is no.
 #
 DEFAULT_HOME	yes
 
@@ -361,14 +370,14 @@ ENVIRON_FILE	/etc/environment
 # (examples: 022 -> 002, 077 -> 007) for non-root users, if the uid is
 # the same as gid, and username is the same as the primary group name.
 #
-# This also enables userdel to remove user groups if no members exist.
+# This also enables userdel(8) to remove user groups if no members exist.
 #
 USERGROUPS_ENAB yes
 
 #
-# If set to a non-nul number, the shadow utilities will make sure that
+# If set to a non-zero number, the shadow utilities will make sure that
 # groups never have more than this number of users on one line.
-# This permit to support split groups (groups split into multiple lines,
+# This permits to support split groups (groups split into multiple lines,
 # with the same group ID, to avoid limitation of the line length in the
 # group file).
 #
@@ -377,10 +386,15 @@ USERGROUPS_ENAB yes
 #MAX_MEMBERS_PER_GROUP	0
 
 #
-# If useradd should create home directories for users by default (non
+# If useradd(8) should create home directories for users by default (non
-# system users only)
+# system users only).
-# This option is overridden with the -M or -m flags on the useradd command
+# This option is overridden with the -M or -m flags on the useradd(8)
-# line.
+# command-line.
 #
 #CREATE_HOME     yes
 
+#
+# Force use shadow, even if shadow passwd & shadow group files are
+# missing.
+#
+#FORCE_SHADOW    yes

lib/Makefile.am

@@ -14,6 +14,7 @@ libshadow_la_SOURCES = \
 	encrypt.c \
 	exitcodes.h \
 	faillog.h \
+	fields.c \
 	fputsx.c \
 	getdef.c \
 	getdef.h \
@@ -38,6 +39,10 @@ libshadow_la_SOURCES = \
 	pwio.c \
 	pwio.h \
 	pwmem.c \
+	subordinateio.h \
+	subordinateio.c \
+	selinux.c \
+	semanage.c \
 	sgetgrent.c \
 	sgetpwent.c \
 	sgetspent.c \
@@ -47,8 +52,13 @@ libshadow_la_SOURCES = \
 	shadowio.c \
 	shadowio.h \
 	shadowmem.c \
+	spawn.c \
 	utent.c
 
+if WITH_TCB
+libshadow_la_SOURCES += tcbfuncs.c tcbfuncs.h
+endif
+
 # These files are unneeded for some reason, listed in
 # order of appearance:
 #

lib/commonio.c

@@ -2,7 +2,7 @@
  * Copyright (c) 1990 - 1994, Julianne Frances Haugh
  * Copyright (c) 1996 - 2001, Marek Michałkiewicz
  * Copyright (c) 2001 - 2006, Tomasz Kłoczko
- * Copyright (c) 2007 - 2009, Nicolas François
+ * Copyright (c) 2007 - 2011, Nicolas François
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -45,16 +45,16 @@
 #include <stdio.h>
 #include <signal.h>
 #include "nscd.h"
-#ifdef WITH_SELINUX
+#ifdef WITH_TCB
-#include <selinux/selinux.h>
+#include <tcb.h>
-#endif
+#endif				/* WITH_TCB */
 #include "prototypes.h"
 #include "commonio.h"
 
 /* local function prototypes */
 static int lrename (const char *, const char *);
 static int check_link_count (const char *file);
-static int do_lock_file (const char *file, const char *lock);
+static int do_lock_file (const char *file, const char *lock, bool log);
 static /*@null@*/ /*@dependent@*/FILE *fopen_set_perms (
 	const char *name,
 	const char *mode,
@@ -132,7 +132,7 @@ static int check_link_count (const char *file)
 }
 
 
-static int do_lock_file (const char *file, const char *lock)
+static int do_lock_file (const char *file, const char *lock, bool log)
 {
 	int fd;
 	pid_t pid;
@@ -142,6 +142,11 @@ static int do_lock_file (const char *file, const char *lock)
 
 	fd = open (file, O_CREAT | O_EXCL | O_WRONLY, 0600);
 	if (-1 == fd) {
+		if (log) {
+			(void) fprintf (stderr,
+			                "%s: %s: %s\n",
+			                Prog, file, strerror (errno));
+		}
 		return 0;
 	}
 
@@ -149,6 +154,11 @@ static int do_lock_file (const char *file, const char *lock)
 	snprintf (buf, sizeof buf, "%lu", (unsigned long) pid);
 	len = (ssize_t) strlen (buf) + 1;
 	if (write (fd, buf, (size_t) len) != len) {
+		if (log) {
+			(void) fprintf (stderr,
+			                "%s: %s: %s\n",
+			                Prog, file, strerror (errno));
+		}
 		(void) close (fd);
 		unlink (file);
 		return 0;
@@ -157,12 +167,22 @@ static int do_lock_file (const char *file, const char *lock)
 
 	if (link (file, lock) == 0) {
 		retval = check_link_count (file);
+		if ((0==retval) && log) {
+			(void) fprintf (stderr,
+			                "%s: %s: lock file already used\n",
+			                Prog, file);
+		}
 		unlink (file);
 		return retval;
 	}
 
 	fd = open (lock, O_RDWR);
 	if (-1 == fd) {
+		if (log) {
+			(void) fprintf (stderr,
+			                "%s: %s: %s\n",
+			                Prog, lock, strerror (errno));
+		}
 		unlink (file);
 		errno = EINVAL;
 		return 0;
@@ -170,29 +190,60 @@ static int do_lock_file (const char *file, const char *lock)
 	len = read (fd, buf, sizeof (buf) - 1);
 	close (fd);
 	if (len <= 0) {
+		if (log) {
+			(void) fprintf (stderr,
+			                "%s: existing lock file %s without a PID\n",
+			                Prog, lock);
+		}
 		unlink (file);
 		errno = EINVAL;
 		return 0;
 	}
 	buf[len] = '\0';
 	if (get_pid (buf, &pid) == 0) {
+		if (log) {
+			(void) fprintf (stderr,
+			                "%s: existing lock file %s with an invalid PID '%s'\n",
+			                Prog, lock, buf);
+		}
 		unlink (file);
 		errno = EINVAL;
 		return 0;
 	}
 	if (kill (pid, 0) == 0) {
+		if (log) {
+			(void) fprintf (stderr,
+			                "%s: lock %s already used by PID %lu\n",
+			                Prog, lock, (unsigned long) pid);
+		}
 		unlink (file);
 		errno = EEXIST;
 		return 0;
 	}
 	if (unlink (lock) != 0) {
+		if (log) {
+			(void) fprintf (stderr,
+			                "%s: cannot get lock %s: %s\n",
+			                Prog, lock, strerror (errno));
+		}
 		unlink (file);
 		return 0;
 	}
 
 	retval = 0;
-	if ((link (file, lock) == 0) && (check_link_count (file) != 0)) {
+	if (link (file, lock) == 0) {
-		retval = 1;
+		retval = check_link_count (file);
+		if ((0==retval) && log) {
+			(void) fprintf (stderr,
+			                "%s: %s: lock file already used\n",
+			                Prog, file);
+		}
+	} else {
+		if (log) {
+			(void) fprintf (stderr,
+			                "%s: cannot get lock %s: %s\n",
+			                Prog, lock, strerror (errno));
+		}
 	}
 
 	unlink (file);
@@ -219,21 +270,21 @@ static /*@null@*/ /*@dependent@*/FILE *fopen_set_perms (
 	if (fchown (fileno (fp), sb->st_uid, sb->st_gid) != 0) {
 		goto fail;
 	}
-#else
+#else				/* !HAVE_FCHOWN */
 	if (chown (name, sb->st_mode) != 0) {
 		goto fail;
 	}
-#endif
+#endif				/* !HAVE_FCHOWN */
 
 #ifdef HAVE_FCHMOD
 	if (fchmod (fileno (fp), sb->st_mode & 0664) != 0) {
 		goto fail;
 	}
-#else
+#else				/* !HAVE_FCHMOD */
 	if (chmod (name, sb->st_mode & 0664) != 0) {
 		goto fail;
 	}
-#endif
+#endif				/* !HAVE_FCHMOD */
 	return fp;
 
       fail:
@@ -325,7 +376,7 @@ bool commonio_present (const struct commonio_db *db)
 }
 
 
-int commonio_lock_nowait (struct commonio_db *db)
+int commonio_lock_nowait (struct commonio_db *db, bool log)
 {
 	char file[1024];
 	char lock[1024];
@@ -337,7 +388,7 @@ int commonio_lock_nowait (struct commonio_db *db)
 	snprintf (file, sizeof file, "%s.%lu",
 	          db->filename, (unsigned long) getpid ());
 	snprintf (lock, sizeof lock, "%s.lock", db->filename);
-	if (do_lock_file (file, lock) != 0) {
+	if (do_lock_file (file, lock, log) != 0) {
 		db->locked = true;
 		lock_count++;
 		return 1;
@@ -361,17 +412,22 @@ int commonio_lock (struct commonio_db *db)
 	 */
 	if (0 == lock_count) {
 		if (lckpwdf () == -1) {
+			if (geteuid () != 0) {
+				(void) fprintf (stderr,
+				                "%s: Permission denied.\n",
+				                Prog);
+			}
 			return 0;	/* failure */
 		}
 	}
 
-	if (commonio_lock_nowait (db) != 0) {
+	if (commonio_lock_nowait (db, true) != 0) {
 		return 1;	/* success */
 	}
 
 	ulckpwdf ();
 	return 0;		/* failure */
-#else
+#else				/* !HAVE_LCKPWDF */
 	int i;
 
 	/*
@@ -388,16 +444,18 @@ int commonio_lock (struct commonio_db *db)
 		if (i > 0) {
 			sleep (LOCK_SLEEP);	/* delay between retries */
 		}
-		if (commonio_lock_nowait (db) != 0) {
+		if (commonio_lock_nowait (db, i==LOCK_TRIES-1) != 0) {
 			return 1;	/* success */
 		}
 		/* no unnecessary retries on "permission denied" errors */
 		if (geteuid () != 0) {
+			(void) fprintf (stderr, "%s: Permission denied.\n",
+			                Prog);
 			return 0;
 		}
 	}
 	return 0;		/* failure */
-#endif
+#endif				/* !HAVE_LCKPWDF */
 }
 
 static void dec_lock_count (void)
@@ -414,7 +472,7 @@ static void dec_lock_count (void)
 			}
 #ifdef HAVE_LCKPWDF
 			ulckpwdf ();
-#endif
+#endif				/* HAVE_LCKPWDF */
 		}
 	}
 }
@@ -533,6 +591,7 @@ int commonio_open (struct commonio_db *db, int mode)
 	void *eptr = NULL;
 	int flags = mode;
 	size_t buflen;
+	int fd;
 	int saved_errno;
 
 	mode &= ~O_CREAT;
@@ -549,11 +608,31 @@ int commonio_open (struct commonio_db *db, int mode)
 		return 0;
 	}
 
-	db->head = db->tail = NULL;
+	db->head = NULL;
+	db->tail = NULL;
 	db->cursor = NULL;
 	db->changed = false;
 
-	db->fp = fopen (db->filename, db->readonly ? "r" : "r+");
+	fd = open (db->filename,
+	             (db->readonly ? O_RDONLY : O_RDWR)
+	           | O_NOCTTY | O_NONBLOCK | O_NOFOLLOW);
+	saved_errno = errno;
+	db->fp = NULL;
+	if (fd >= 0) {
+#ifdef WITH_TCB
+		if (tcb_is_suspect (fd) != 0) {
+			(void) close (fd);
+			errno = EINVAL;
+			return 0;
+		}
+#endif				/* WITH_TCB */
+		db->fp = fdopen (fd, db->readonly ? "r" : "r+");
+		saved_errno = errno;
+		if (NULL == db->fp) {
+			(void) close (fd);
+		}
+	}
+	errno = saved_errno;
 
 	/*
 	 * If O_CREAT was specified and the file didn't exist, it will be
@@ -568,16 +647,7 @@ int commonio_open (struct commonio_db *db, int mode)
 	}
 
 	/* Do not inherit fd in spawned processes (e.g. nscd) */
-	fcntl(fileno(db->fp), F_SETFD, FD_CLOEXEC);
+	fcntl (fileno (db->fp), F_SETFD, FD_CLOEXEC);
-
-#ifdef WITH_SELINUX
-	db->scontext = NULL;
-	if ((is_selinux_enabled () > 0) && (!db->readonly)) {
-		if (fgetfilecon (fileno (db->fp), &db->scontext) < 0) {
-			goto cleanup_errno;
-		}
-	}
-#endif
 
 	buflen = BUFLEN;
 	buf = (char *) malloc (buflen);
@@ -663,12 +733,6 @@ int commonio_open (struct commonio_db *db, int mode)
       cleanup_errno:
 	saved_errno = errno;
 	free_linked_list (db);
-#ifdef WITH_SELINUX
-	if (db->scontext != NULL) {
-		freecon (db->scontext);
-		db->scontext = NULL;
-	}
-#endif
 	fclose (db->fp);
 	db->fp = NULL;
 	errno = saved_errno;
@@ -683,10 +747,26 @@ commonio_sort (struct commonio_db *db, int (*cmp) (const void *, const void *))
 {
 	struct commonio_entry **entries, *ptr;
 	size_t n = 0, i;
+#if KEEP_NIS_AT_END
+	struct commonio_entry *nis = NULL;
+#endif
 
-	for (ptr = db->head; NULL != ptr; ptr = ptr->next) {
+	for (ptr = db->head;
+	        (NULL != ptr)
+#if KEEP_NIS_AT_END
+	     && (NULL != ptr->line)
+	     && (   ('+' != ptr->line[0])
+	         && ('-' != ptr->line[0]))
+#endif
+	     ;
+	     ptr = ptr->next) {
 		n++;
 	}
+#if KEEP_NIS_AT_END
+	if ((NULL != ptr) && (NULL != ptr->line)) {
+		nis = ptr;
+	}
+#endif
 
 	if (n <= 1) {
 		return 0;
@@ -698,18 +778,40 @@ commonio_sort (struct commonio_db *db, int (*cmp) (const void *, const void *))
 	}
 
 	n = 0;
-	for (ptr = db->head; NULL != ptr; ptr = ptr->next) {
+	for (ptr = db->head;
-		entries[n++] = ptr;
+#if KEEP_NIS_AT_END
+	     nis != ptr;
+#else
+	     NULL != ptr;
+#endif
+/*@ -nullderef @*/
+	     ptr = ptr->next
+/*@ +nullderef @*/
+	    ) {
+		entries[n] = ptr;
+		n++;
 	}
 	qsort (entries, n, sizeof (struct commonio_entry *), cmp);
 
+	/* Take care of the head and tail separately */
 	db->head = entries[0];
-	db->tail = entries[--n];
+	n--;
+#if KEEP_NIS_AT_END
+	if (NULL == nis)
+#endif
+	{
+		db->tail = entries[n];
+	}
 	db->head->prev = NULL;
 	db->head->next = entries[1];
-	db->tail->prev = entries[n - 1];
+	entries[n]->prev = entries[n - 1];
-	db->tail->next = NULL;
+#if KEEP_NIS_AT_END
+	entries[n]->next = nis;
+#else
+	entries[n]->next = NULL;
+#endif
 
+	/* Now other elements have prev and next entries */
 	for (i = 1; i < n; i++) {
 		entries[i]->prev = entries[i - 1];
 		entries[i]->next = entries[i + 1];
@@ -724,7 +826,8 @@ commonio_sort (struct commonio_db *db, int (*cmp) (const void *, const void *))
 /*
  * Sort entries in db according to order in another.
  */
-int commonio_sort_wrt (struct commonio_db *shadow, struct commonio_db *passwd)
+int commonio_sort_wrt (struct commonio_db *shadow,
+                       const struct commonio_db *passwd)
 {
 	struct commonio_entry *head = NULL, *pw_ptr, *spw_ptr;
 	const char *name;
@@ -811,10 +914,6 @@ int commonio_close (struct commonio_db *db)
 	int errors = 0;
 	struct stat sb;
 
-#ifdef WITH_SELINUX
-	/*@null@*/security_context_t old_context = NULL;
-#endif
-
 	if (!db->isopen) {
 		errno = EINVAL;
 		return 0;
@@ -822,7 +921,7 @@ int commonio_close (struct commonio_db *db)
 	db->isopen = false;
 
 	if (!db->changed || db->readonly) {
-		fclose (db->fp);
+		(void) fclose (db->fp);
 		db->fp = NULL;
 		goto success;
 	}
@@ -834,27 +933,21 @@ int commonio_close (struct commonio_db *db)
 	memzero (&sb, sizeof sb);
 	if (NULL != db->fp) {
 		if (fstat (fileno (db->fp), &sb) != 0) {
-			fclose (db->fp);
+			(void) fclose (db->fp);
 			db->fp = NULL;
 			goto fail;
 		}
-#ifdef WITH_SELINUX
+
-		if (db->scontext != NULL) {
-			if (getfscreatecon (&old_context) < 0) {
-				errors++;
-				goto fail;
-			}
-			if (setfscreatecon (db->scontext) < 0) {
-				errors++;
-				goto fail;
-			}
-		}
-#endif
 		/*
 		 * Create backup file.
 		 */
 		snprintf (buf, sizeof buf, "%s-", db->filename);
 
+#ifdef WITH_SELINUX
+		if (set_selinux_file_context (buf) != 0) {
+			errors++;
+		}
+#endif
 		if (create_backup (buf, db->fp) != 0) {
 			errors++;
 		}
@@ -863,6 +956,11 @@ int commonio_close (struct commonio_db *db)
 			errors++;
 		}
 
+#ifdef WITH_SELINUX
+		if (reset_selinux_file_context () != 0) {
+			errors++;
+		}
+#endif
 		if (errors != 0) {
 			db->fp = NULL;
 			goto fail;
@@ -870,15 +968,20 @@ int commonio_close (struct commonio_db *db)
 	} else {
 		/*
 		 * Default permissions for new [g]shadow files.
-		 * (passwd and group always exist...)
 		 */
-		sb.st_mode = 0400;
+		sb.st_mode = db->st_mode;
-		sb.st_uid = 0;
+		sb.st_uid = db->st_uid;
-		sb.st_gid = 0;
+		sb.st_gid = db->st_gid;
 	}
 
 	snprintf (buf, sizeof buf, "%s+", db->filename);
 
+#ifdef WITH_SELINUX
+	if (set_selinux_file_context (buf) != 0) {
+		errors++;
+	}
+#endif
+
 	db->fp = fopen_set_perms (buf, "w", &sb);
 	if (NULL == db->fp) {
 		goto fail;
@@ -895,9 +998,9 @@ int commonio_close (struct commonio_db *db)
 	if (fsync (fileno (db->fp)) != 0) {
 		errors++;
 	}
-#else
+#else				/* !HAVE_FSYNC */
 	sync ();
-#endif
+#endif				/* !HAVE_FSYNC */
 	if (fclose (db->fp) != 0) {
 		errors++;
 	}
@@ -913,25 +1016,18 @@ int commonio_close (struct commonio_db *db)
 		goto fail;
 	}
 
+#ifdef WITH_SELINUX
+	if (reset_selinux_file_context () != 0) {
+		goto fail;
+	}
+#endif
+
 	nscd_need_reload = true;
 	goto success;
       fail:
 	errors++;
       success:
 
-#ifdef WITH_SELINUX
-	if (db->scontext != NULL) {
-		if (NULL != old_context) {
-		if (setfscreatecon (old_context) < 0) {
-			errors++;
-		}
-			freecon (old_context);
-			old_context = NULL;
-		}
-		freecon (db->scontext);
-		db->scontext = NULL;
-	}
-#endif
 	free_linked_list (db);
 	return errors == 0;
 }
@@ -962,7 +1058,7 @@ static /*@dependent@*/ /*@null@*/struct commonio_entry *find_entry_by_name (
 	struct commonio_db *db,
 	const char *name)
 {
-	return next_entry_by_name(db, db->head, name);
+	return next_entry_by_name (db, db->head, name);
 }
 
 
@@ -984,6 +1080,7 @@ int commonio_update (struct commonio_db *db, const void *eptr)
 	if (NULL != p) {
 		if (next_entry_by_name (db, p->next, db->ops->getname (eptr)) != NULL) {
 			fprintf (stderr, _("Multiple entries named '%s' in %s. Please fix this with pwck or grpck.\n"), db->ops->getname (eptr), db->filename);
+			db->ops->free (nentry);
 			return 0;
 		}
 		db->ops->free (p->eptr);
@@ -1008,14 +1105,46 @@ int commonio_update (struct commonio_db *db, const void *eptr)
 
 #if KEEP_NIS_AT_END
 	add_one_entry_nis (db, p);
-#else
+#else				/* !KEEP_NIS_AT_END */
 	add_one_entry (db, p);
-#endif
+#endif				/* !KEEP_NIS_AT_END */
 
 	db->changed = true;
 	return 1;
 }
 
+#ifdef ENABLE_SUBIDS
+int commonio_append (struct commonio_db *db, const void *eptr)
+{
+	struct commonio_entry *p;
+	void *nentry;
+
+	if (!db->isopen || db->readonly) {
+		errno = EINVAL;
+		return 0;
+	}
+	nentry = db->ops->dup (eptr);
+	if (NULL == nentry) {
+		errno = ENOMEM;
+		return 0;
+	}
+	/* new entry */
+	p = (struct commonio_entry *) malloc (sizeof *p);
+	if (NULL == p) {
+		db->ops->free (nentry);
+		errno = ENOMEM;
+		return 0;
+	}
+
+	p->eptr = nentry;
+	p->line = NULL;
+	p->changed = true;
+	add_one_entry (db, p);
+
+	db->changed = true;
+	return 1;
+}
+#endif				/* ENABLE_SUBIDS */
 
 void commonio_del_entry (struct commonio_db *db, const struct commonio_entry *p)
 {

lib/commonio.h

@@ -2,7 +2,7 @@
  * Copyright (c) 1990 - 1994, Julianne Frances Haugh
  * Copyright (c) 1996 - 2000, Marek Michałkiewicz
  * Copyright (c) 2001 - 2005, Tomasz Kłoczko
- * Copyright (c) 2007 - 2008, Nicolas François
+ * Copyright (c) 2007 - 2010, Nicolas François
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -123,10 +123,17 @@ struct commonio_db {
 #ifdef WITH_SELINUX
 	/*@null@*/security_context_t scontext;
 #endif
+	/*
+	 * Default permissions and owner for newly created data file.
+         */
+	mode_t st_mode;
+	uid_t st_uid;
+	gid_t st_gid;
 	/*
 	 * Head, tail, current position in linked list.
 	 */
-	/*@owned@*/ /*@null@*/struct commonio_entry *head, *tail;
+	/*@owned@*/ /*@null@*/struct commonio_entry *head;
+	/*@dependent@*/ /*@null@*/struct commonio_entry *tail;
 	/*@dependent@*/ /*@null@*/struct commonio_entry *cursor;
 
 	/*
@@ -141,20 +148,23 @@ struct commonio_db {
 extern int commonio_setname (struct commonio_db *, const char *);
 extern bool commonio_present (const struct commonio_db *db);
 extern int commonio_lock (struct commonio_db *);
-extern int commonio_lock_nowait (struct commonio_db *);
+extern int commonio_lock_nowait (struct commonio_db *, bool log);
 extern int commonio_open (struct commonio_db *, int);
 extern /*@observer@*/ /*@null@*/const void *commonio_locate (struct commonio_db *, const char *);
 extern int commonio_update (struct commonio_db *, const void *);
+#ifdef ENABLE_SUBIDS
+extern int commonio_append (struct commonio_db *, const void *);
+#endif				/* ENABLE_SUBIDS */
 extern int commonio_remove (struct commonio_db *, const char *);
 extern int commonio_rewind (struct commonio_db *);
 extern /*@observer@*/ /*@null@*/const void *commonio_next (struct commonio_db *);
 extern int commonio_close (struct commonio_db *);
 extern int commonio_unlock (struct commonio_db *);
 extern void commonio_del_entry (struct commonio_db *,
-				const struct commonio_entry *);
+                                const struct commonio_entry *);
 extern int commonio_sort_wrt (struct commonio_db *shadow,
-			      struct commonio_db *passwd);
+                              const struct commonio_db *passwd);
 extern int commonio_sort (struct commonio_db *db,
-			  int (*cmp) (const void *, const void *));
+                          int (*cmp) (const void *, const void *));
 
 #endif

lib/defines.h

@@ -177,7 +177,7 @@ char *strchr (), *strrchr (), *strtok ();
  * --Nekral */
 #define SYSLOG(x)							\
 	do {								\
-		char *old_locale = setlocale(LC_ALL, NULL);		\
+		char *old_locale = setlocale (LC_ALL, NULL);		\
 		char *saved_locale = NULL;				\
 		if (NULL != old_locale) {				\
 			saved_locale = strdup (old_locale);		\

lib/encrypt.c

@@ -2,7 +2,7 @@
  * Copyright (c) 1990 - 1993, Julianne Frances Haugh
  * Copyright (c) 1996 - 2000, Marek Michałkiewicz
  * Copyright (c) 2005       , Tomasz Kłoczko
- * Copyright (c) 2007 - 2008, Nicolas François
+ * Copyright (c) 2007 - 2010, Nicolas François
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -40,27 +40,26 @@
 #include "prototypes.h"
 #include "defines.h"
 
-char *pw_encrypt (const char *clear, const char *salt)
+/*@exposed@*//*@null@*/char *pw_encrypt (const char *clear, const char *salt)
 {
 	static char cipher[128];
 	char *cp;
 
 	cp = crypt (clear, salt);
-	if (!cp) {
+	if (NULL == cp) {
 		/*
 		 * Single Unix Spec: crypt() may return a null pointer,
-		 * and set errno to indicate an error.  The caller doesn't
+		 * and set errno to indicate an error. In this case return
-		 * expect us to return NULL, so...
+		 * the NULL so the caller can handle appropriately.
 		 */
-		perror ("crypt");
+		return NULL;
-		exit (EXIT_FAILURE);
 	}
 
-	/* The GNU crypt does not return NULL if the algorithm is not
+	/* Some crypt() do not return NULL if the algorithm is not
 	 * supported, and return a DES encrypted password. */
 	if ((NULL != salt) && (salt[0] == '$') && (strlen (cp) <= 13))
 	{
-		const char *method;
+		/*@observer@*/const char *method;
 		switch (salt[1])
 		{
 			case '1':
@@ -79,9 +78,9 @@ char *pw_encrypt (const char *clear, const char *salt)
 				method = &nummethod[0];
 			}
 		}
-		fprintf (stderr,
+		(void) fprintf (stderr,
-			 _("crypt method not supported by libcrypt? (%s)\n"),
+		                _("crypt method not supported by libcrypt? (%s)\n"),
-			  method);
+		                method);
 		exit (EXIT_FAILURE);
 	}
 

lib/fields.c

@@ -54,6 +54,10 @@ int valid_field (const char *field, const char *illegal)
 	const char *cp;
 	int err = 0;
 
+	if (NULL == field) {
+		return -1;
+	}
+
 	/* For each character of field, search if it appears in the list
 	 * of illegal characters. */
 	for (cp = field; '\0' != *cp; cp++) {

lib/getdef.c

@@ -49,6 +49,32 @@ struct itemdef {
 	/*@null@*/char *value;		/* value given, or NULL if no value     */
 };
 
+#define PAMDEFS					\
+	{"CHFN_AUTH", NULL},			\
+	{"CHSH_AUTH", NULL},			\
+	{"CRACKLIB_DICTPATH", NULL},		\
+	{"ENV_HZ", NULL},			\
+	{"ENVIRON_FILE", NULL},			\
+	{"ENV_TZ", NULL},			\
+	{"FAILLOG_ENAB", NULL},			\
+	{"FTMP_FILE", NULL},			\
+	{"ISSUE_FILE", NULL},			\
+	{"LASTLOG_ENAB", NULL},			\
+	{"LOGIN_STRING", NULL},			\
+	{"MAIL_CHECK_ENAB", NULL},		\
+	{"MOTD_FILE", NULL},			\
+	{"NOLOGINS_FILE", NULL},		\
+	{"OBSCURE_CHECKS_ENAB", NULL},		\
+	{"PASS_ALWAYS_WARN", NULL},		\
+	{"PASS_CHANGE_TRIES", NULL},		\
+	{"PASS_MAX_LEN", NULL},			\
+	{"PASS_MIN_LEN", NULL},			\
+	{"PORTTIME_CHECKS_ENAB", NULL},		\
+	{"QUOTAS_ENAB", NULL},			\
+	{"SU_WHEEL_ONLY", NULL},		\
+	{"ULIMIT", NULL},
+
+
 #define NUMDEFS	(sizeof(def_table)/sizeof(def_table[0]))
 static struct itemdef def_table[] = {
 	{"CHFN_RESTRICT", NULL},
@@ -81,6 +107,12 @@ static struct itemdef def_table[] = {
 	{"SHA_CRYPT_MAX_ROUNDS", NULL},
 	{"SHA_CRYPT_MIN_ROUNDS", NULL},
 #endif
+	{"SUB_GID_COUNT", NULL},
+	{"SUB_GID_MAX", NULL},
+	{"SUB_GID_MIN", NULL},
+	{"SUB_UID_COUNT", NULL},
+	{"SUB_UID_MAX", NULL},
+	{"SUB_UID_MIN", NULL},
 	{"SULOG_FILE", NULL},
 	{"SU_NAME", NULL},
 	{"SYS_GID_MAX", NULL},
@@ -96,37 +128,28 @@ static struct itemdef def_table[] = {
 	{"USERDEL_CMD", NULL},
 	{"USERGROUPS_ENAB", NULL},
 #ifndef USE_PAM
-	{"CHFN_AUTH", NULL},
+	PAMDEFS
-	{"CHSH_AUTH", NULL},
-	{"CRACKLIB_DICTPATH", NULL},
-	{"ENV_HZ", NULL},
-	{"ENVIRON_FILE", NULL},
-	{"ENV_TZ", NULL},
-	{"FAILLOG_ENAB", NULL},
-	{"FTMP_FILE", NULL},
-	{"ISSUE_FILE", NULL},
-	{"LASTLOG_ENAB", NULL},
-	{"LOGIN_STRING", NULL},
-	{"MAIL_CHECK_ENAB", NULL},
-	{"MOTD_FILE", NULL},
-	{"NOLOGINS_FILE", NULL},
-	{"OBSCURE_CHECKS_ENAB", NULL},
-	{"PASS_ALWAYS_WARN", NULL},
-	{"PASS_CHANGE_TRIES", NULL},
-	{"PASS_MAX_LEN", NULL},
-	{"PASS_MIN_LEN", NULL},
-	{"PORTTIME_CHECKS_ENAB", NULL},
-	{"QUOTAS_ENAB", NULL},
-	{"SU_WHEEL_ONLY", NULL},
-	{"ULIMIT", NULL},
 #endif
 #ifdef USE_SYSLOG
 	{"SYSLOG_SG_ENAB", NULL},
 	{"SYSLOG_SU_ENAB", NULL},
 #endif
+#ifdef WITH_TCB
+	{"TCB_AUTH_GROUP", NULL},
+	{"TCB_SYMLINKS", NULL},
+	{"USE_TCB", NULL},
+#endif
+	{"FORCE_SHADOW", NULL},
 	{NULL, NULL}
 };
 
+#define NUMKNOWNDEFS	(sizeof(knowndef_table)/sizeof(knowndef_table[0]))
+static struct itemdef knowndef_table[] = {
+#ifdef USE_PAM
+	PAMDEFS
+#endif
+};
+
 #ifndef LOGINDEFS
 #define LOGINDEFS "/etc/login.defs"
 #endif
@@ -386,10 +409,17 @@ static /*@observer@*/ /*@null@*/struct itemdef *def_find (const char *name)
 	 * Item was never found.
 	 */
 
+	for (ptr = knowndef_table; NULL != ptr->name; ptr++) {
+		if (strcmp (ptr->name, name) == 0) {
+			goto out;
+		}
+	}
 	fprintf (stderr,
 	         _("configuration error - unknown item '%s' (notify administrator)\n"),
 	         name);
 	SYSLOG ((LOG_CRIT, "unknown configuration item `%s'", name));
+
+out:
 	return (struct itemdef *) NULL;
 }
 
@@ -405,23 +435,26 @@ static void def_load (void)
 	FILE *fp;
 	char buf[1024], *name, *value, *s;
 
+	/*
+	 * Set the initialized flag.
+	 * (do it early to prevent recursion in putdef_str())
+	 */
+	def_loaded = true;
+
 	/*
 	 * Open the configuration definitions file.
 	 */
 	fp = fopen (def_fname, "r");
 	if (NULL == fp) {
+		if (errno == ENOENT)
+			return;
+
 		int err = errno;
 		SYSLOG ((LOG_CRIT, "cannot open login definitions %s [%s]",
 		         def_fname, strerror (err)));
 		exit (EXIT_FAILURE);
 	}
 
-	/*
-	 * Set the initialized flag.
-	 * (do it early to prevent recursion in putdef_str())
-	 */
-	def_loaded = true;
-
 	/*
 	 * Go through all of the lines in the file.
 	 */

lib/groupio.c

@@ -3,7 +3,7 @@
  * Copyright (c) 1996 - 2000, Marek Michałkiewicz
  * Copyright (c) 2001       , Michał Moskal
  * Copyright (c) 2005       , Tomasz Kłoczko
- * Copyright (c) 2007 - 2009, Nicolas François
+ * Copyright (c) 2007 - 2010, Nicolas François
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -80,6 +80,23 @@ static int group_put (const void *ent, FILE * file)
 {
 	const struct group *gr = ent;
 
+	if (   (NULL == gr)
+	    || (valid_field (gr->gr_name, ":\n") == -1)
+	    || (valid_field (gr->gr_passwd, ":\n") == -1)
+	    || (gr->gr_gid == (gid_t)-1)) {
+		return -1;
+	}
+
+	/* FIXME: fail also if gr->gr_mem == NULL ?*/
+	if (NULL != gr->gr_mem) {
+		size_t i;
+		for (i = 0; NULL != gr->gr_mem[i]; i++) {
+			if (valid_field (gr->gr_mem[i], ",:\n") == -1) {
+				return -1;
+			}
+		}
+	}
+
 	return (putgrent (gr, file) == -1) ? -1 : 0;
 }
 
@@ -113,6 +130,9 @@ static /*@owned@*/struct commonio_db group_db = {
 #ifdef WITH_SELINUX
 	NULL,			/* scontext */
 #endif
+	0644,                   /* st_mode */
+	0,                      /* st_uid */
+	0,                      /* st_gid */
 	NULL,			/* head */
 	NULL,			/* tail */
 	NULL,			/* cursor */
@@ -313,7 +333,7 @@ static /*@null@*/struct commonio_entry *merge_group_entries (
 
 	/* Concatenate the 2 lines */
 	new_line_len = strlen (gr1->line) + strlen (gr2->line) +1;
-	new_line = (char *)malloc ((new_line_len + 1) * sizeof(char*));
+	new_line = (char *)malloc (new_line_len + 1);
 	if (NULL == new_line) {
 		errno = ENOMEM;
 		return NULL;
@@ -336,7 +356,7 @@ static /*@null@*/struct commonio_entry *merge_group_entries (
 			members++;
 		}
 	}
-	new_members = (char **)malloc ( (members+1) * sizeof(char*) );
+	new_members = (char **)calloc ( (members+1), sizeof(char*) );
 	if (NULL == new_members) {
 		free (new_line);
 		errno = ENOMEM;
@@ -345,6 +365,8 @@ static /*@null@*/struct commonio_entry *merge_group_entries (
 	for (i=0; NULL != gptr1->gr_mem[i]; i++) {
 		new_members[i] = gptr1->gr_mem[i];
 	}
+	/* NULL termination enforced by above calloc */
+
 	members = i;
 	for (i=0; NULL != gptr2->gr_mem[i]; i++) {
 		char **pmember = new_members;
@@ -382,15 +404,19 @@ static int split_groups (unsigned int max_members)
 		struct commonio_entry *new;
 		struct group *new_gptr;
 		unsigned int members = 0;
+		unsigned int i;
 
 		/* Check if this group must be split */
-		if (!gr->changed)
+		if (!gr->changed) {
 			continue;
-		if (NULL == gptr)
+		}
+		if (NULL == gptr) {
 			continue;
+		}
 		for (members = 0; NULL != gptr->gr_mem[members]; members++);
-		if (members <= max_members)
+		if (members <= max_members) {
 			continue;
+		}
 
 		new = (struct commonio_entry *) malloc (sizeof *new);
 		if (NULL == new) {
@@ -408,9 +434,23 @@ static int split_groups (unsigned int max_members)
 		new->changed = true;
 
 		/* Enforce the maximum number of members on gptr */
-		gptr->gr_mem[max_members] = NULL;
+		for (i = max_members; NULL != gptr->gr_mem[i]; i++) {
+			free (gptr->gr_mem[i]);
+			gptr->gr_mem[i] = NULL;
+		}
+		/* Shift all the members */
 		/* The number of members in new_gptr will be check later */
-		new_gptr->gr_mem = &new_gptr->gr_mem[max_members];
+		for (i = 0; NULL != new_gptr->gr_mem[i + max_members]; i++) {
+			if (NULL != new_gptr->gr_mem[i]) {
+				free (new_gptr->gr_mem[i]);
+			}
+			new_gptr->gr_mem[i] = new_gptr->gr_mem[i + max_members];
+			new_gptr->gr_mem[i + max_members] = NULL;
+		}
+		for (; NULL != new_gptr->gr_mem[i]; i++) {
+			free (new_gptr->gr_mem[i]);
+			new_gptr->gr_mem[i] = NULL;
+		}
 
 		/* insert the new entry in the list */
 		new->prev = gr;

lib/groupmem.c

@@ -3,7 +3,7 @@
  * Copyright (c) 1996 - 2000, Marek Michałkiewicz
  * Copyright (c) 2001       , Michał Moskal
  * Copyright (c) 2005       , Tomasz Kłoczko
- * Copyright (c) 2007 - 2009, Nicolas François
+ * Copyright (c) 2007 - 2013, Nicolas François
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -48,25 +48,37 @@
 	if (NULL == gr) {
 		return NULL;
 	}
-	*gr = *grent;
+	/* The libc might define other fields. They won't be copied. */
+	memset (gr, 0, sizeof *gr);
+	gr->gr_gid = grent->gr_gid;
+	/*@-mustfreeonly@*/
 	gr->gr_name = strdup (grent->gr_name);
+	/*@=mustfreeonly@*/
 	if (NULL == gr->gr_name) {
+		gr_free(gr);
 		return NULL;
 	}
+	/*@-mustfreeonly@*/
 	gr->gr_passwd = strdup (grent->gr_passwd);
+	/*@=mustfreeonly@*/
 	if (NULL == gr->gr_passwd) {
+		gr_free(gr);
 		return NULL;
 	}
 
 	for (i = 0; grent->gr_mem[i]; i++);
 
+	/*@-mustfreeonly@*/
 	gr->gr_mem = (char **) malloc ((i + 1) * sizeof (char *));
+	/*@=mustfreeonly@*/
 	if (NULL == gr->gr_mem) {
+		gr_free(gr);
 		return NULL;
 	}
 	for (i = 0; grent->gr_mem[i]; i++) {
 		gr->gr_mem[i] = strdup (grent->gr_mem[i]);
 		if (NULL == gr->gr_mem[i]) {
+			gr_free(gr);
 			return NULL;
 		}
 	}
@@ -78,11 +90,16 @@
 void gr_free (/*@out@*/ /*@only@*/struct group *grent)
 {
 	free (grent->gr_name);
-	memzero (grent->gr_passwd, strlen (grent->gr_passwd));
+	if (NULL != grent->gr_passwd) {
-	free (grent->gr_passwd);
+		memzero (grent->gr_passwd, strlen (grent->gr_passwd));
-	while (*(grent->gr_mem)) {
+		free (grent->gr_passwd);
-		free (*(grent->gr_mem));
+	}
-		grent->gr_mem++;
+	if (NULL != grent->gr_mem) {
+		size_t i;
+		for (i = 0; NULL != grent->gr_mem[i]; i++) {
+			free (grent->gr_mem[i]);
+		}
+		free (grent->gr_mem);
 	}
 	free (grent);
 }

lib/gshadow.c

@@ -216,13 +216,13 @@ void endsgent (void)
 	static char *buf = NULL;
 
 	char *cp;
-	struct sgrp *ret;
 
 	if (0 == buflen) {
 		buf = (char *) malloc (BUFSIZ);
 		if (NULL == buf) {
 			return NULL;
 		}
+		buflen = BUFSIZ;
 	}
 
 	if (NULL == fp) {
@@ -230,9 +230,9 @@ void endsgent (void)
 	}
 
 #ifdef	USE_NIS
-	while (fgetsx (buf, (int) sizeof buf, fp) == buf)
+	while (fgetsx (buf, (int) buflen, fp) == buf)
 #else
-	if (fgetsx (buf, (int) sizeof buf, fp) == buf)
+	if (fgetsx (buf, (int) buflen, fp) == buf)
 #endif
 	{
 		while (   ((cp = strrchr (buf, '\n')) == NULL)

lib/gshadow_.h

@@ -43,7 +43,7 @@
 struct sgrp {
 	char *sg_name;		/* group name */
 	char *sg_passwd;	/* group password */
-	char **sg_adm;		/* group administator list */
+	char **sg_adm;		/* group administrator list */
 	char **sg_mem;		/* group membership list */
 };
 

lib/nscd.c

@@ -3,57 +3,49 @@
 #include <config.h>
 #ifdef USE_NSCD
 
-/* because of TEMP_FAILURE_RETRY */
-#ifndef _GNU_SOURCE
-#define _GNU_SOURCE
-#endif
-
-#include <features.h>
 #include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <spawn.h>
-#include <errno.h>
 #include <sys/wait.h>
 #include <sys/types.h>
+#include "exitcodes.h"
 #include "defines.h"
+#include "prototypes.h"
 #include "nscd.h"
 
-#define MSG_NSCD_FLUSH_CACHE_FAILED "Failed to flush the nscd cache.\n"
+#define MSG_NSCD_FLUSH_CACHE_FAILED "%s: Failed to flush the nscd cache.\n"
 
 /*
  * nscd_flush_cache - flush specified service buffer in nscd cache
  */
 int nscd_flush_cache (const char *service)
 {
-	pid_t pid, termpid;
+	int status, code;
-	int err, status;
+	const char *cmd = "/usr/sbin/nscd";
-	char *spawnedArgs[] = {"/usr/sbin/nscd", "nscd", "-i", service, NULL};
+	const char *spawnedArgs[] = {"nscd", "-i", service, NULL};
-	char *spawnedEnv[] = {NULL};
+	const char *spawnedEnv[] = {NULL};
 
-	/* spawn process */
+	if (run_command (cmd, spawnedArgs, spawnedEnv, &status) != 0) {
-	err = posix_spawn (&pid, spawnedArgs[0], NULL, NULL,
+		/* run_command writes its own more detailed message. */
-	                   spawnedArgs, spawnedEnv);
+		(void) fprintf (stderr, _(MSG_NSCD_FLUSH_CACHE_FAILED), Prog);
-	if(0 != err)
-	{
-		(void) fputs (_(MSG_NSCD_FLUSH_CACHE_FAILED), stderr);
-		(void) fprintf (stderr, "posix_spawn() error=%d\n", err);
 		return -1;
 	}
 
-	/* Wait for the spawned process to exit */
+	code = WEXITSTATUS (status);
-	termpid = TEMP_FAILURE_RETRY (waitpid (pid, &status, 0));
+	if (!WIFEXITED (status)) {
-	if (-1 == termpid)
+		(void) fprintf (stderr,
-	{
+		                _("%s: nscd did not terminate normally (signal %d)\n"),
-		(void) fputs (_(MSG_NSCD_FLUSH_CACHE_FAILED), stderr);
+		                Prog, WTERMSIG (status));
-		perror("waitpid");
 		return -1;
-	}
+	} else if (code == E_CMD_NOTFOUND) {
-	else if (termpid != pid)
+		/* nscd is not installed, or it is installed but uses an
-	{
+		   interpreter that is missing.  Probably the former. */
-		(void) fputs (_(MSG_NSCD_FLUSH_CACHE_FAILED), stderr);
+		return 0;
-		(void) fprintf (stderr, "waitpid returned %ld != %ld\n",
+	} else if (code == 1) {
-		               (long int) termpid, (long int) pid);
+		/* nscd is installed, but it isn't active. */
+		return 0;
+	} else if (code != 0) {
+		(void) fprintf (stderr, _("%s: nscd exited with status %d\n"),
+		                Prog, code);
+		(void) fprintf (stderr, _(MSG_NSCD_FLUSH_CACHE_FAILED), Prog);
 		return -1;
 	}
 

lib/prototypes.h

@@ -2,7 +2,7 @@
  * Copyright (c) 1990 - 1994, Julianne Frances Haugh
  * Copyright (c) 1996 - 2000, Marek Michałkiewicz
  * Copyright (c) 2003 - 2006, Tomasz Kłoczko
- * Copyright (c) 2007 - 2009, Nicolas François
+ * Copyright (c) 2007 - 2010, Nicolas François
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -42,6 +42,8 @@
 #ifndef _PROTOTYPES_H
 #define _PROTOTYPES_H
 
+#include <config.h>
+
 #include <sys/stat.h>
 #ifdef USE_UTMPX
 #include <utmpx.h>
@@ -57,7 +59,7 @@
 #include "defines.h"
 #include "commonio.h"
 
-extern char *Prog;
+extern /*@observer@*/ const char *Prog;
 
 /* addgrps.c */
 #if defined (HAVE_SETGROUPS) && ! defined (USE_PAM)
@@ -72,25 +74,27 @@ extern int isexpired (const struct passwd *, /*@null@*/const struct spwd *);
 
 /* basename() renamed to Basename() to avoid libc name space confusion */
 /* basename.c */
-extern char *Basename (char *str);
+extern /*@observer@*/const char *Basename (const char *str);
 
 /* chowndir.c */
-extern int chown_tree (const char *, uid_t, uid_t, gid_t, gid_t);
+extern int chown_tree (const char *root,
+                       uid_t old_uid, uid_t new_uid,
+                       gid_t old_gid, gid_t new_gid);
 
 /* chowntty.c */
 extern void chown_tty (const struct passwd *);
 
 /* cleanup.c */
-typedef void (*cleanup_function) (/*@null@*/void *arg);
+typedef /*@null@*/void (*cleanup_function) (/*@null@*/void *arg);
-void add_cleanup (cleanup_function pcf, /*@null@*/void *arg);
+void add_cleanup (/*@notnull@*/cleanup_function pcf, /*@null@*/void *arg);
-void del_cleanup (cleanup_function pcf);
+void del_cleanup (/*@notnull@*/cleanup_function pcf);
 void do_cleanups (void);
 
 /* cleanup_group.c */
 struct cleanup_info_mod {
 	char *audit_msg;
 	char *action;
-	char *name;
+	/*@observer@*/const char *name;
 };
 void cleanup_report_add_group (void *group_name);
 void cleanup_report_add_group_group (void *group_name);
@@ -116,15 +120,13 @@ extern bool console (const char *);
 
 /* copydir.c */
 extern int copy_tree (const char *src_root, const char *dst_root,
-                      long int uid, long int gid);
+                      bool copy_root,
-extern int remove_tree (const char *root);
+                      bool reset_selinux,
-
+                      uid_t old_uid, uid_t new_uid,
-#ifdef WITH_SELINUX
+                      gid_t old_gid, gid_t new_gid);
-extern int selinux_file_context (const char *dst_name);
-#endif
 
 /* encrypt.c */
-extern char *pw_encrypt (const char *, const char *);
+extern /*@exposed@*//*@null@*/char *pw_encrypt (const char *, const char *);
 
 /* entry.c */
 extern void pw_entry (const char *, struct passwd *);
@@ -149,11 +151,22 @@ extern int find_new_uid (bool sys_user,
                          uid_t *uid,
                          /*@null@*/uid_t const *preferred_uid);
 
+#ifdef ENABLE_SUBIDS
+/* find_new_sub_gids.c */
+extern int find_new_sub_gids (const char *owner,
+			      gid_t *range_start, unsigned long *range_count);
+
+/* find_new_sub_uids.c */
+extern int find_new_sub_uids (const char *owner,
+			      uid_t *range_start, unsigned long *range_count);
+#endif				/* ENABLE_SUBIDS */
+
+
 /* get_gid.c */
 extern int get_gid (const char *gidstr, gid_t *gid);
 
 /* getgr_nam_gid.c */
-extern /*@null@*/struct group *getgr_nam_gid (const char *grname);
+extern /*@only@*//*@null@*/struct group *getgr_nam_gid (/*@null@*/const char *grname);
 
 /* getlong.c */
 extern int getlong (const char *numstr, /*@out@*/long int *result);
@@ -236,7 +249,7 @@ extern void mailcheck (void);
 extern void motd (void);
 
 /* myname.c */
-extern /*@null@*/struct passwd *get_my_pwent (void);
+extern /*@null@*//*@only@*/struct passwd *get_my_pwent (void);
 
 /* pam_pass_non_interractive.c */
 #ifdef USE_PAM
@@ -247,7 +260,7 @@ extern int do_pam_passwd_non_interractive (const char *pam_service,
 
 /* obscure.c */
 #ifndef USE_PAM
-extern int obscure (const char *, const char *, const struct passwd *);
+extern bool obscure (const char *, const char *, const struct passwd *);
 #endif
 
 /* pam_pass.c */
@@ -280,12 +293,30 @@ extern /*@dependent@*/ /*@null@*/struct commonio_entry *__pw_get_head (void);
 extern /*@null@*/ /*@only@*/struct passwd *__pw_dup (const struct passwd *pwent);
 extern void pw_free (/*@out@*/ /*@only@*/struct passwd *pwent);
 
+/* remove_tree.c */
+extern int remove_tree (const char *root, bool remove_root);
+
 /* rlogin.c */
 extern int do_rlogin (const char *remote_host, char *name, size_t namelen,
                       char *term, size_t termlen);
 
+/* root_flag.c */
+extern void process_root_flag (const char* short_opt, int argc, char **argv);
+
 /* salt.c */
-extern /*@observer@*/const char *crypt_make_salt (/*@null@*/const char *meth, /*@null@*/void *arg);
+extern /*@observer@*/const char *crypt_make_salt (/*@null@*//*@observer@*/const char *meth, /*@null@*/void *arg);
+
+/* selinux.c */
+#ifdef WITH_SELINUX
+extern int set_selinux_file_context (const char *dst_name);
+extern int reset_selinux_file_context (void);
+#endif
+
+/* semanage.c */
+#ifdef WITH_SELINUX
+extern int set_seuser(const char *login_name, const char *seuser_name);
+extern int del_seuser(const char *login_name);
+#endif
 
 /* setugid.c */
 extern int setup_groups (const struct passwd *info);
@@ -331,17 +362,17 @@ extern void spw_free (/*@out@*/ /*@only@*/struct spwd *spent);
 /* shell.c */
 extern int shell (const char *file, /*@null@*/const char *arg, char *const envp[]);
 
-/* system.c */
+/* spawn.c */
-extern int safe_system (const char *command,
+extern int run_command (const char *cmd, const char *argv[],
-                        const char *argv[],
+                        /*@null@*/const char *envp[], /*@out@*/int *status);
-                        const char *env[],
-                        int ignore_stderr);
 
 /* strtoday.c */
 extern long strtoday (const char *);
 
 /* suauth.c */
-extern int check_su_auth (const char *actual_id, const char *wanted_id);
+extern int check_su_auth (const char *actual_id,
+                          const char *wanted_id,
+                          bool su_to_root);
 
 /* sulog.c */
 extern void sulog (const char *tty,
@@ -357,7 +388,7 @@ extern void ttytype (const char *);
 
 /* tz.c */
 #ifndef USE_PAM
-extern char *tz (const char *);
+extern /*@observer@*/const char *tz (const char *);
 #endif
 
 /* ulimit.c */
@@ -385,9 +416,9 @@ extern int setutmpx (struct utmpx *utx);
 extern bool valid (const char *, const struct passwd *);
 
 /* xmalloc.c */
-extern /*@maynotreturn@*/ /*@out@*//*@only@*/char *xmalloc (size_t size)
+extern /*@maynotreturn@*/ /*@only@*//*@out@*//*@notnull@*/char *xmalloc (size_t size)
   /*@ensures MaxSet(result) == (size - 1); @*/;
-extern /*@maynotreturn@*/ /*@only@*/char *xstrdup (const char *);
+extern /*@maynotreturn@*/ /*@only@*//*@notnull@*/char *xstrdup (const char *);
 
 /* xgetpwnam.c */
 extern /*@null@*/ /*@only@*/struct passwd *xgetpwnam (const char *);

lib/pwauth.c

@@ -73,6 +73,7 @@ int pw_auth (const char *cipher,
 	char prompt[1024];
 	char *clear = NULL;
 	const char *cp;
+	const char *encrypted;
 	int retval;
 
 #ifdef	SKEY
@@ -177,7 +178,12 @@ int pw_auth (const char *cipher,
 	 * the results there as well.
 	 */
 
-	retval = strcmp (pw_encrypt (input, cipher), cipher);
+	encrypted = pw_encrypt (input, cipher);
+	if (NULL != encrypted) {
+		retval = strcmp (encrypted, cipher);
+	} else {
+		retval = -1;
+	}
 
 #ifdef  SKEY
 	/*

lib/pwio.c

@@ -72,6 +72,17 @@ static int passwd_put (const void *ent, FILE * file)
 {
 	const struct passwd *pw = ent;
 
+	if (   (NULL == pw)
+	    || (valid_field (pw->pw_name, ":\n") == -1)
+	    || (valid_field (pw->pw_passwd, ":\n") == -1)
+	    || (pw->pw_uid == (uid_t)-1)
+	    || (pw->pw_gid == (gid_t)-1)
+	    || (valid_field (pw->pw_gecos, ":\n") == -1)
+	    || (valid_field (pw->pw_dir, ":\n") == -1)
+	    || (valid_field (pw->pw_shell, ":\n") == -1)) {
+		return -1;
+	}
+
 	return (putpwent (pw, file) == -1) ? -1 : 0;
 }
 
@@ -94,6 +105,9 @@ static struct commonio_db passwd_db = {
 #ifdef WITH_SELINUX
 	NULL,			/* scontext */
 #endif
+	0644,                   /* st_mode */
+	0,                      /* st_uid */
+	0,                      /* st_gid */
 	NULL,			/* head */
 	NULL,			/* tail */
 	NULL,			/* cursor */

lib/pwmem.c

@@ -3,7 +3,7 @@
  * Copyright (c) 1996 - 2000, Marek Michałkiewicz
  * Copyright (c) 2001       , Michał Moskal
  * Copyright (c) 2003 - 2005, Tomasz Kłoczko
- * Copyright (c) 2007 - 2009, Nicolas François
+ * Copyright (c) 2007 - 2013, Nicolas François
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -48,25 +48,43 @@
 	if (NULL == pw) {
 		return NULL;
 	}
-	*pw = *pwent;
+	/* The libc might define other fields. They won't be copied. */
+	memset (pw, 0, sizeof *pw);
+	pw->pw_uid = pwent->pw_uid;
+	pw->pw_gid = pwent->pw_gid;
+	/*@-mustfreeonly@*/
 	pw->pw_name = strdup (pwent->pw_name);
+	/*@=mustfreeonly@*/
 	if (NULL == pw->pw_name) {
+		pw_free(pw);
 		return NULL;
 	}
+	/*@-mustfreeonly@*/
 	pw->pw_passwd = strdup (pwent->pw_passwd);
+	/*@=mustfreeonly@*/
 	if (NULL == pw->pw_passwd) {
+		pw_free(pw);
 		return NULL;
 	}
+	/*@-mustfreeonly@*/
 	pw->pw_gecos = strdup (pwent->pw_gecos);
+	/*@=mustfreeonly@*/
 	if (NULL == pw->pw_gecos) {
+		pw_free(pw);
 		return NULL;
 	}
+	/*@-mustfreeonly@*/
 	pw->pw_dir = strdup (pwent->pw_dir);
+	/*@=mustfreeonly@*/
 	if (NULL == pw->pw_dir) {
+		pw_free(pw);
 		return NULL;
 	}
+	/*@-mustfreeonly@*/
 	pw->pw_shell = strdup (pwent->pw_shell);
+	/*@=mustfreeonly@*/
 	if (NULL == pw->pw_shell) {
+		pw_free(pw);
 		return NULL;
 	}
 
@@ -76,8 +94,10 @@
 void pw_free (/*@out@*/ /*@only@*/struct passwd *pwent)
 {
 	free (pwent->pw_name);
-	memzero (pwent->pw_passwd, strlen (pwent->pw_passwd));
+	if (pwent->pw_passwd) {
-	free (pwent->pw_passwd);
+		memzero (pwent->pw_passwd, strlen (pwent->pw_passwd));
+		free (pwent->pw_passwd);
+	}
 	free (pwent->pw_gecos);
 	free (pwent->pw_dir);
 	free (pwent->pw_shell);

lib/selinux.c

@@ -0,0 +1,103 @@
+/*
+ * Copyright (c) 2011       , Peter Vrabec <pvrabec@redhat.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the copyright holders or contributors may not be used to
+ *    endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <config.h>
+
+#ifdef WITH_SELINUX
+
+#include "defines.h"
+
+#include <selinux/selinux.h>
+#include "prototypes.h"
+
+
+static bool selinux_checked = false;
+static bool selinux_enabled;
+
+/*
+ * set_selinux_file_context - Set the security context before any file or
+ *                            directory creation.
+ *
+ *	set_selinux_file_context () should be called before any creation
+ *	of file, symlink, directory, ...
+ *
+ *	Callers may have to Reset SELinux to create files with default
+ *	contexts with reset_selinux_file_context
+ */
+int set_selinux_file_context (const char *dst_name)
+{
+	/*@null@*/security_context_t scontext = NULL;
+
+	if (!selinux_checked) {
+		selinux_enabled = is_selinux_enabled () > 0;
+		selinux_checked = true;
+	}
+
+	if (selinux_enabled) {
+		/* Get the default security context for this file */
+		if (matchpathcon (dst_name, 0, &scontext) < 0) {
+			if (security_getenforce () != 0) {
+				return 1;
+			}
+		}
+		/* Set the security context for the next created file */
+		if (setfscreatecon (scontext) < 0) {
+			if (security_getenforce () != 0) {
+				return 1;
+			}
+		}
+		freecon (scontext);
+	}
+	return 0;
+}
+
+/*
+ * reset_selinux_file_context - Reset the security context to the default
+ *                              policy behavior
+ *
+ *	reset_selinux_file_context () should be called after the context
+ *	was changed with set_selinux_file_context ()
+ */
+int reset_selinux_file_context (void)
+{
+	if (!selinux_checked) {
+		selinux_enabled = is_selinux_enabled () > 0;
+		selinux_checked = true;
+	}
+	if (selinux_enabled) {
+		if (setfscreatecon (NULL) != 0) {
+			return 1;
+		}
+	}
+	return 0;
+}
+
+#else				/* !WITH_SELINUX */
+extern int errno;		/* warning: ANSI C forbids an empty source file */
+#endif				/* !WITH_SELINUX */

lib/semanage.c

@@ -0,0 +1,378 @@
+/*
+ * Copyright (c) 2010       , Jakub Hrozek <jhrozek@redhat.com>
+ * Copyright (c) 2011       , Peter Vrabec <pvrabec@redhat.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the copyright holders or contributors may not be used to
+ *    endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <config.h>
+
+#ifdef WITH_SELINUX
+
+#include "defines.h"
+
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+#include <stdio.h>
+#include <stdarg.h>
+#include <selinux/selinux.h>
+#include <semanage/semanage.h>
+#include "prototypes.h"
+
+
+#ifndef DEFAULT_SERANGE
+#define DEFAULT_SERANGE "s0"
+#endif
+
+
+static void semanage_error_callback (unused void *varg,
+                                     semanage_handle_t *handle,
+                                     const char *fmt, ...)
+{
+	int ret;
+	char * message = NULL;
+	va_list ap;
+
+
+	va_start (ap, fmt);
+	ret = vasprintf (&message, fmt, ap);
+	va_end (ap);
+	if (ret < 0) {
+		/* ENOMEM */
+		return;
+	}
+
+	switch (semanage_msg_get_level (handle)) {
+	case SEMANAGE_MSG_ERR:
+	case SEMANAGE_MSG_WARN:
+		fprintf (stderr, _("[libsemanage]: %s\n"), message);
+		break;
+	case SEMANAGE_MSG_INFO:
+		/* nop */
+		break;
+	}
+
+	free (message);
+}
+
+
+static semanage_handle_t *semanage_init (void)
+{
+	int ret;
+	semanage_handle_t *handle = NULL;
+
+	handle = semanage_handle_create ();
+	if (NULL == handle) {
+		fprintf (stderr,
+		         _("Cannot create SELinux management handle\n"));
+		return NULL;
+	}
+
+	semanage_msg_set_callback (handle, semanage_error_callback, NULL);
+
+	ret = semanage_is_managed (handle);
+	if (ret != 1) {
+		fprintf (stderr, _("SELinux policy not managed\n"));
+		goto fail;
+	}
+
+	ret = semanage_access_check (handle);
+	if (ret < SEMANAGE_CAN_READ) {
+		fprintf (stderr, _("Cannot read SELinux policy store\n"));
+		goto fail;
+	}
+
+	ret = semanage_connect (handle);
+	if (ret != 0) {
+		fprintf (stderr,
+		         _("Cannot establish SELinux management connection\n"));
+		goto fail;
+	}
+
+	ret = semanage_begin_transaction (handle);
+	if (ret != 0) {
+		fprintf (stderr, _("Cannot begin SELinux transaction\n"));
+		goto fail;
+	}
+
+	return handle;
+
+fail:
+	semanage_handle_destroy (handle);
+	return NULL;
+}
+
+
+static int semanage_user_mod (semanage_handle_t *handle,
+                              semanage_seuser_key_t *key,
+                              const char *login_name,
+                              const char *seuser_name)
+{
+	int ret;
+	semanage_seuser_t *seuser = NULL;
+
+	semanage_seuser_query (handle, key, &seuser);
+	if (NULL == seuser) {
+		fprintf (stderr,
+		         _("Could not query seuser for %s\n"), login_name);
+		ret = 1;
+		goto done;
+	}
+
+	ret = semanage_seuser_set_mlsrange (handle, seuser, DEFAULT_SERANGE);
+	if (ret != 0) {
+		fprintf (stderr,
+		         _("Could not set serange for %s\n"), login_name);
+		ret = 1;
+		goto done;
+	}
+
+	ret = semanage_seuser_set_sename (handle, seuser, seuser_name);
+	if (ret != 0) {
+		fprintf (stderr,
+		         _("Could not set sename for %s\n"),
+		         login_name);
+		ret = 1;
+		goto done;
+	}
+
+	ret = semanage_seuser_modify_local (handle, key, seuser);
+	if (ret != 0) {
+		fprintf (stderr,
+		         _("Could not modify login mapping for %s\n"),
+		         login_name);
+		ret = 1;
+		goto done;
+	}
+
+	ret = 0;
+done:
+	semanage_seuser_free (seuser);
+	return ret;
+}
+
+
+static int semanage_user_add (semanage_handle_t *handle,
+                             semanage_seuser_key_t *key,
+                             const char *login_name,
+                             const char *seuser_name)
+{
+	int ret;
+	semanage_seuser_t *seuser = NULL;
+
+	ret = semanage_seuser_create (handle, &seuser);
+	if (ret != 0) {
+		fprintf (stderr,
+		         _("Cannot create SELinux login mapping for %s\n"),
+		         login_name);
+		ret = 1;
+		goto done;
+	}
+
+	ret = semanage_seuser_set_name (handle, seuser, login_name);
+	if (ret != 0) {
+		fprintf (stderr, _("Could not set name for %s\n"), login_name);
+		ret = 1;
+		goto done;
+	}
+
+	ret = semanage_seuser_set_mlsrange (handle, seuser, DEFAULT_SERANGE);
+	if (ret != 0) {
+		fprintf (stderr,
+		         _("Could not set serange for %s\n"),
+		         login_name);
+		ret = 1;
+		goto done;
+	}
+
+	ret = semanage_seuser_set_sename (handle, seuser, seuser_name);
+	if (ret != 0) {
+		fprintf (stderr,
+		         _("Could not set SELinux user for %s\n"),
+		         login_name);
+		ret = 1;
+		goto done;
+	}
+
+	ret = semanage_seuser_modify_local (handle, key, seuser);
+	if (ret != 0) {
+		fprintf (stderr,
+		         _("Could not add login mapping for %s\n"),
+		         login_name);
+		ret = 1;
+		goto done;
+	}
+
+	ret = 0;
+done:
+	semanage_seuser_free (seuser);
+	return ret;
+}
+
+
+int set_seuser (const char *login_name, const char *seuser_name)
+{
+	semanage_handle_t *handle = NULL;
+	semanage_seuser_key_t *key = NULL;
+	int ret;
+	int seuser_exists = 0;
+
+	if (NULL == seuser_name) {
+		/* don't care, just let system pick the defaults */
+		return 0;
+	}
+
+	handle = semanage_init ();
+	if (NULL == handle) {
+		fprintf (stderr, _("Cannot init SELinux management\n"));
+		ret = 1;
+		goto done;
+	}
+
+	ret = semanage_seuser_key_create (handle, login_name, &key);
+	if (ret != 0) {
+		fprintf (stderr, _("Cannot create SELinux user key\n"));
+		ret = 1;
+		goto done;
+	}
+
+	ret = semanage_seuser_exists (handle, key, &seuser_exists);
+	if (ret < 0) {
+		fprintf (stderr, _("Cannot verify the SELinux user\n"));
+		ret = 1;
+		goto done;
+	}
+
+	if (0 != seuser_exists) {
+		ret = semanage_user_mod (handle, key, login_name, seuser_name);
+		if (ret != 0) {
+			fprintf (stderr,
+			         _("Cannot modify SELinux user mapping\n"));
+			ret = 1;
+			goto done;
+		}
+	} else {
+		ret = semanage_user_add (handle, key, login_name, seuser_name);
+		if (ret != 0) {
+			fprintf (stderr,
+			         _("Cannot add SELinux user mapping\n"));
+			ret = 1;
+			goto done;
+		}
+	}
+
+	ret = semanage_commit (handle);
+	if (ret < 0) {
+		fprintf (stderr, _("Cannot commit SELinux transaction\n"));
+		ret = 1;
+		goto done;
+	}
+
+	ret = 0;
+
+done:
+	semanage_seuser_key_free (key);
+	semanage_handle_destroy (handle);
+	return ret;
+}
+
+
+int del_seuser (const char *login_name)
+{
+	semanage_handle_t *handle = NULL;
+	semanage_seuser_key_t *key = NULL;
+	int ret;
+	int exists = 0;
+
+	handle = semanage_init ();
+	if (NULL == handle) {
+		fprintf (stderr, _("Cannot init SELinux management\n"));
+		ret = 1;
+		goto done;
+	}
+
+	ret = semanage_seuser_key_create (handle, login_name, &key);
+	if (ret != 0) {
+		fprintf (stderr, _("Cannot create SELinux user key\n"));
+		ret = 1;
+		goto done;
+	}
+
+	ret = semanage_seuser_exists (handle, key, &exists);
+	if (ret < 0) {
+		fprintf (stderr, _("Cannot verify the SELinux user\n"));
+		ret = 1;
+		goto done;
+	}
+
+	if (0 == exists) {
+		fprintf (stderr,
+		         _("Login mapping for %s is not defined, OK if default mapping was used\n"), 
+		         login_name);
+		ret = 0;  /* probably default mapping */
+		goto done;
+	}
+
+	ret = semanage_seuser_exists_local (handle, key, &exists);
+	if (ret < 0) {
+		fprintf (stderr, _("Cannot verify the SELinux user\n"));
+		ret = 1;
+		goto done;
+	}
+
+	if (0 == exists) {
+		fprintf (stderr,
+		         _("Login mapping for %s is defined in policy, cannot be deleted\n"), 
+		         login_name);
+		ret = 0; /* Login mapping defined in policy can't be deleted */
+		goto done;
+	}
+
+	ret = semanage_seuser_del_local (handle, key);
+	if (ret != 0) {
+		fprintf (stderr,
+		         _("Could not delete login mapping for %s"),
+		         login_name);
+		ret = 1;
+		goto done;
+	}
+
+	ret = semanage_commit (handle);
+	if (ret < 0) {
+		fprintf (stderr, _("Cannot commit SELinux transaction\n"));
+		ret = 1;
+		goto done;
+	}
+
+	ret = 0;
+done:
+	semanage_handle_destroy (handle);
+	return ret;
+}
+#else				/* !WITH_SELINUX */
+extern int errno;		/* warning: ANSI C forbids an empty source file */
+#endif				/* !WITH_SELINUX */

lib/sgroupio.c

@@ -3,7 +3,7 @@
  * Copyright (c) 1996 - 2000, Marek Michałkiewicz
  * Copyright (c) 2001       , Michał Moskal
  * Copyright (c) 2005       , Tomasz Kłoczko
- * Copyright (c) 2007 - 2008, Nicolas François
+ * Copyright (c) 2007 - 2013, Nicolas François
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -51,13 +51,19 @@
 	if (NULL == sg) {
 		return NULL;
 	}
-	*sg = *sgent;
+	/* Do the same as the other _dup function, even if we know the
+	 * structure. */
+	memset (sg, 0, sizeof *sg);
+	/*@-mustfreeonly@*/
 	sg->sg_name = strdup (sgent->sg_name);
+	/*@=mustfreeonly@*/
 	if (NULL == sg->sg_name) {
 		free (sg);
 		return NULL;
 	}
+	/*@-mustfreeonly@*/
 	sg->sg_passwd = strdup (sgent->sg_passwd);
+	/*@=mustfreeonly@*/
 	if (NULL == sg->sg_passwd) {
 		free (sg->sg_name);
 		free (sg);
@@ -65,7 +71,9 @@
 	}
 
 	for (i = 0; NULL != sgent->sg_adm[i]; i++);
+	/*@-mustfreeonly@*/
 	sg->sg_adm = (char **) malloc ((i + 1) * sizeof (char *));
+	/*@=mustfreeonly@*/
 	if (NULL == sg->sg_adm) {
 		free (sg->sg_passwd);
 		free (sg->sg_name);
@@ -88,7 +96,9 @@
 	sg->sg_adm[i] = NULL;
 
 	for (i = 0; NULL != sgent->sg_mem[i]; i++);
+	/*@-mustfreeonly@*/
 	sg->sg_mem = (char **) malloc ((i + 1) * sizeof (char *));
+	/*@=mustfreeonly@*/
 	if (NULL == sg->sg_mem) {
 		for (i = 0; NULL != sg->sg_adm[i]; i++) {
 			free (sg->sg_adm[i]);
@@ -137,17 +147,20 @@ static void gshadow_free (/*@out@*/ /*@only@*/void *ent)
 
 void sgr_free (/*@out@*/ /*@only@*/struct sgrp *sgent)
 {
+	size_t i;
 	free (sgent->sg_name);
-	memzero (sgent->sg_passwd, strlen (sgent->sg_passwd));
+	if (NULL != sgent->sg_passwd) {
-	free (sgent->sg_passwd);
+		memzero (sgent->sg_passwd, strlen (sgent->sg_passwd));
-	while (NULL != *(sgent->sg_adm)) {
+		free (sgent->sg_passwd);
-		free (*(sgent->sg_adm));
-		sgent->sg_adm++;
 	}
-	while (NULL != *(sgent->sg_mem)) {
+	for (i = 0; NULL != sgent->sg_adm[i]; i++) {
-		free (*(sgent->sg_mem));
+		free (sgent->sg_adm[i]);
-		sgent->sg_mem++;
 	}
+	free (sgent->sg_adm);
+	for (i = 0; NULL != sgent->sg_mem[i]; i++) {
+		free (sgent->sg_mem[i]);
+	}
+	free (sgent->sg_mem);
 	free (sgent);
 }
 
@@ -167,6 +180,32 @@ static int gshadow_put (const void *ent, FILE * file)
 {
 	const struct sgrp *sg = ent;
 
+	if (   (NULL == sg)
+	    || (valid_field (sg->sg_name, ":\n") == -1)
+	    || (valid_field (sg->sg_passwd, ":\n") == -1)) {
+		return -1;
+	}
+
+	/* FIXME: fail also if sg->sg_adm == NULL ?*/
+	if (NULL != sg->sg_adm) {
+		size_t i;
+		for (i = 0; NULL != sg->sg_adm[i]; i++) {
+			if (valid_field (sg->sg_adm[i], ",:\n") == -1) {
+				return -1;
+			}
+		}
+	}
+
+	/* FIXME: fail also if sg->sg_mem == NULL ?*/
+	if (NULL != sg->sg_mem) {
+		size_t i;
+		for (i = 0; NULL != sg->sg_mem[i]; i++) {
+			if (valid_field (sg->sg_mem[i], ",:\n") == -1) {
+				return -1;
+			}
+		}
+	}
+
 	return (putsgent (sg, file) == -1) ? -1 : 0;
 }
 
@@ -189,6 +228,9 @@ static struct commonio_db gshadow_db = {
 #ifdef WITH_SELINUX
 	NULL,			/* scontext */
 #endif
+	0400,                   /* st_mode */
+	0,                      /* st_uid */
+	0,                      /* st_gid */
 	NULL,			/* head */
 	NULL,			/* tail */
 	NULL,			/* cursor */
@@ -210,6 +252,8 @@ int sgr_setdbname (const char *filename)
 
 bool sgr_file_present (void)
 {
+	if (getdef_bool ("FORCE_SHADOW"))
+		return true;
 	return commonio_present (&gshadow_db);
 }
 

lib/sgroupio.h

@@ -37,7 +37,7 @@
 
 extern int sgr_close (void);
 extern bool sgr_file_present (void);
-extern /*@null@*/const struct sgrp *sgr_locate (const char *name);
+extern /*@observer@*/ /*@null@*/const struct sgrp *sgr_locate (const char *name);
 extern int sgr_lock (void);
 extern int sgr_setdbname (const char *filename);
 extern /*@observer@*/const char *sgr_dbname (void);

lib/shadow.c

@@ -42,10 +42,10 @@
 #include "defines.h"
 #include <stdio.h>
 #ifdef	USE_NIS
-static int nis_used;
+static bool nis_used;
-static int nis_ignore;
+static bool nis_ignore;
 static enum { native, start, middle, native2 } nis_state;
-static int nis_bound;
+static bool nis_bound;
 static char *nis_domain;
 static char *nis_key;
 static int nis_keylen;
@@ -66,12 +66,12 @@ static FILE *shadow;
  * __setspNIS - turn on or off NIS searches
  */
 
-void __setspNIS (int flag)
+void __setspNIS (bool flag)
 {
 	nis_ignore = !flag;
 
 	if (nis_ignore) {
-		nis_used = 0;
+		nis_used = false;
 	}
 }
 
@@ -81,10 +81,11 @@ void __setspNIS (int flag)
 
 static int bind_nis (void)
 {
-	if (yp_get_default_domain (&nis_domain))
+	if (yp_get_default_domain (&nis_domain)) {
 		return -1;
+	}
 
-	nis_bound = 1;
+	nis_bound = true;
 	return 0;
 }
 #endif
@@ -95,10 +96,11 @@ static int bind_nis (void)
 
 void setspent (void)
 {
-	if (shadow)
+	if (NULL != shadow) {
 		rewind (shadow);
-	else
+	}else {
 		shadow = fopen (SHADOW_FILE, "r");
+	}
 
 #ifdef	USE_NIS
 	nis_state = native;
@@ -111,8 +113,9 @@ void setspent (void)
 
 void endspent (void)
 {
-	if (shadow)
+	if (NULL != shadow) {
 		(void) fclose (shadow);
+	}
 
 	shadow = (FILE *) 0;
 }
@@ -172,8 +175,9 @@ static struct spwd *my_sgetspent (const char *string)
 
 	spwd.sp_namp = fields[0];
 #ifdef	USE_NIS
-	if (IS_NISCHAR (fields[0][0]))
+	if (IS_NISCHAR (fields[0][0])) {
-		nis_used = 1;
+		nis_used = true;
+	}
 #endif
 	spwd.sp_pwdp = fields[1];
 
@@ -211,7 +215,9 @@ static struct spwd *my_sgetspent (const char *string)
 				spwd.sp_min = -1;
 			} else
 #endif
+			{
 				return 0;
+			}
 		} else if (spwd.sp_min < 0) {
 			return 0;
 		}
@@ -263,7 +269,9 @@ static struct spwd *my_sgetspent (const char *string)
 				spwd.sp_warn = -1;
 			} else
 #endif
+			{
 				return 0;
+			}
 		} else if (spwd.sp_warn < 0) {
 			return 0;
 		}
@@ -283,7 +291,9 @@ static struct spwd *my_sgetspent (const char *string)
 				spwd.sp_inact = -1;
 			} else
 #endif
+			{
 				return 0;
+			}
 		} else if (spwd.sp_inact < 0) {
 			return 0;
 		}
@@ -303,7 +313,9 @@ static struct spwd *my_sgetspent (const char *string)
 				spwd.sp_expire = -1;
 			} else
 #endif
+			{
 				return 0;
+			}
 		} else if (spwd.sp_expire < 0) {
 			return 0;
 		}
@@ -324,7 +336,9 @@ static struct spwd *my_sgetspent (const char *string)
 				spwd.sp_flag = SHADOW_SP_FLAG_UNSET;
 			} else
 #endif
+			{
 				return 0;
+			}
 		} else if (spwd.sp_flag < 0) {
 			return 0;
 		}
@@ -377,8 +391,9 @@ struct spwd *getspent (void)
 	struct spwd *val;
 	char buf[BUFSIZ];
 #endif
-	if (!shadow)
+	if (NULL == shadow) {
 		setspent ();
+	}
 
 #ifdef	USE_NIS
       again:
@@ -432,7 +447,7 @@ struct spwd *getspent (void)
 
 		return 0;
 	} else {
-		if (nis_bound == 0) {
+		if (!nis_bound) {
 			if (bind_nis ()) {
 				nis_state = native2;
 				goto again;
@@ -440,15 +455,15 @@ struct spwd *getspent (void)
 		}
 		if (nis_state == start) {
 			if (yp_first (nis_domain, "shadow.bynam", &nis_key,
-				      &nis_keylen, &nis_val, &nis_vallen)) {
+			              &nis_keylen, &nis_val, &nis_vallen)) {
 				nis_state = native2;
 				goto again;
 			}
 			nis_state = middle;
 		} else if (nis_state == middle) {
 			if (yp_next (nis_domain, "shadow.bynam", nis_key,
-				     nis_keylen, &nis_key, &nis_keylen,
+			             nis_keylen, &nis_key, &nis_keylen,
-				     &nis_val, &nis_vallen)) {
+			             &nis_val, &nis_vallen)) {
 				nis_state = native2;
 				goto again;
 			}
@@ -471,7 +486,7 @@ struct spwd *getspnam (const char *name)
 #ifdef	USE_NIS
 	char buf[BUFSIZ];
 	static char save_name[16];
-	int nis_disabled = 0;
+	bool nis_disabled = false;
 #endif
 
 	setspent ();
@@ -481,18 +496,20 @@ struct spwd *getspnam (const char *name)
 	 * Search the shadow.byname map for this user.
 	 */
 
-	if (!nis_ignore && !nis_bound)
+	if (!nis_ignore && !nis_bound) {
 		bind_nis ();
+	}
 
 	if (!nis_ignore && nis_bound) {
 		char *cp;
 
 		if (yp_match (nis_domain, "shadow.byname", name,
-			      strlen (name), &nis_val, &nis_vallen) == 0) {
+		              strlen (name), &nis_val, &nis_vallen) == 0) {
 
 			cp = strchr (nis_val, '\n');
-			if (NULL != cp)
+			if (NULL != cp) {
 				*cp = '\0';
+			}
 
 			nis_state = middle;
 			sp = my_sgetspent (nis_val);
@@ -503,8 +520,9 @@ struct spwd *getspnam (const char *name)
 			}
 			endspent ();
 			return sp;
-		} else
+		} else {
 			nis_state = native2;
+		}
 	}
 #endif
 #ifdef	USE_NIS
@@ -516,17 +534,19 @@ struct spwd *getspnam (const char *name)
 	 */
 
 	if (nis_used) {
-		nis_ignore++;
+		nis_ignore = true;
-		nis_disabled++;
+		nis_disabled = true;
 	}
 #endif
 	while ((sp = getspent ()) != (struct spwd *) 0) {
-		if (strcmp (name, sp->sp_namp) == 0)
+		if (strcmp (name, sp->sp_namp) == 0) {
 			break;
+		}
 	}
 #ifdef	USE_NIS
-	if (nis_disabled)
+	if (nis_disabled) {
-		nis_ignore--;
+		nis_ignore = false;
+	}
 #endif
 	endspent ();
 	return (sp);

lib/shadowio.c

@@ -41,6 +41,10 @@
 #include <stdio.h>
 #include "commonio.h"
 #include "shadowio.h"
+#ifdef WITH_TCB
+#include <tcb.h>
+#include "tcbfuncs.h"
+#endif				/* WITH_TCB */
 
 static /*@null@*/ /*@only@*/void *shadow_dup (const void *ent)
 {
@@ -72,6 +76,12 @@ static int shadow_put (const void *ent, FILE * file)
 {
 	const struct spwd *sp = ent;
 
+	if (   (NULL == sp)
+	    || (valid_field (sp->sp_namp, ":\n") == -1)
+	    || (valid_field (sp->sp_pwdp, ":\n") == -1)) {
+		return -1;
+	}
+
 	return (putspent (sp, file) == -1) ? -1 : 0;
 }
 
@@ -93,7 +103,10 @@ static struct commonio_db shadow_db = {
 	NULL,			/* fp */
 #ifdef WITH_SELINUX
 	NULL,			/* scontext */
-#endif
+#endif				/* WITH_SELINUX */
+	0400,                   /* st_mode */
+	0,                      /* st_uid */
+	0,                      /* st_gid */
 	NULL,			/* head */
 	NULL,			/* tail */
 	NULL,			/* cursor */
@@ -115,17 +128,52 @@ int spw_setdbname (const char *filename)
 
 bool spw_file_present (void)
 {
+	if (getdef_bool ("FORCE_SHADOW"))
+		return true;
 	return commonio_present (&shadow_db);
 }
 
 int spw_lock (void)
 {
-	return commonio_lock (&shadow_db);
+#ifdef WITH_TCB
+	int retval = 0;
+
+	if (!getdef_bool ("USE_TCB")) {
+#endif				/* WITH_TCB */
+		return commonio_lock (&shadow_db);
+#ifdef WITH_TCB
+	}
+	if (shadowtcb_drop_priv () == SHADOWTCB_FAILURE) {
+		return 0;
+	}
+	if (lckpwdf_tcb (shadow_db.filename) == 0) {
+		shadow_db.locked = 1;
+		retval = 1;
+	}
+	if (shadowtcb_gain_priv () == SHADOWTCB_FAILURE) {
+		return 0;
+	}
+	return retval;
+#endif				/* WITH_TCB */
 }
 
 int spw_open (int mode)
 {
-	return commonio_open (&shadow_db, mode);
+	int retval = 0;
+#ifdef WITH_TCB
+	bool use_tcb = getdef_bool ("USE_TCB");
+
+	if (use_tcb && (shadowtcb_drop_priv () == SHADOWTCB_FAILURE)) {
+		return 0;
+	}
+#endif				/* WITH_TCB */
+	retval = commonio_open (&shadow_db, mode);
+#ifdef WITH_TCB
+	if (use_tcb && (shadowtcb_gain_priv () == SHADOWTCB_FAILURE)) {
+		return 0;
+	}
+#endif				/* WITH_TCB */
+	return retval;
 }
 
 /*@observer@*/ /*@null@*/const struct spwd *spw_locate (const char *name)
@@ -155,12 +203,45 @@ int spw_rewind (void)
 
 int spw_close (void)
 {
-	return commonio_close (&shadow_db);
+	int retval = 0;
+#ifdef WITH_TCB
+	bool use_tcb = getdef_bool ("USE_TCB");
+
+	if (use_tcb && (shadowtcb_drop_priv () == SHADOWTCB_FAILURE)) {
+		return 0;
+	}
+#endif				/* WITH_TCB */
+	retval = commonio_close (&shadow_db);
+#ifdef WITH_TCB
+	if (use_tcb && (shadowtcb_gain_priv () == SHADOWTCB_FAILURE)) {
+		return 0;
+	}
+#endif				/* WITH_TCB */
+	return retval;
 }
 
 int spw_unlock (void)
 {
-	return commonio_unlock (&shadow_db);
+#ifdef WITH_TCB
+	int retval = 0;
+
+	if (!getdef_bool ("USE_TCB")) {
+#endif				/* WITH_TCB */
+		return commonio_unlock (&shadow_db);
+#ifdef WITH_TCB
+	}
+	if (shadowtcb_drop_priv () == SHADOWTCB_FAILURE) {
+		return 0;
+	}
+	if (ulckpwdf_tcb () == 0) {
+		shadow_db.locked = 0;
+		retval = 1;
+	}
+	if (shadowtcb_gain_priv () == SHADOWTCB_FAILURE) {
+		return 0;
+	}
+	return retval;
+#endif				/* WITH_TCB */
 }
 
 struct commonio_entry *__spw_get_head (void)
@@ -176,5 +257,10 @@ void __spw_del_entry (const struct commonio_entry *ent)
 /* Sort with respect to passwd ordering. */
 int spw_sort ()
 {
+#ifdef WITH_TCB
+	if (getdef_bool ("USE_TCB")) {
+		return 0;
+	}
+#endif				/* WITH_TCB */
 	return commonio_sort_wrt (&shadow_db, __pw_get_db ());
 }

lib/shadowmem.c

@@ -3,7 +3,7 @@
  * Copyright (c) 1996 - 2000, Marek Michałkiewicz
  * Copyright (c) 2001       , Michał Moskal
  * Copyright (c) 2005       , Tomasz Kłoczko
- * Copyright (c) 2007 - 2009, Nicolas François
+ * Copyright (c) 2007 - 2013, Nicolas François
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -49,13 +49,28 @@
 	if (NULL == sp) {
 		return NULL;
 	}
-	*sp = *spent;
+	/* The libc might define other fields. They won't be copied. */
-	sp->sp_namp = strdup (spent->sp_namp);
+	memset (sp, 0, sizeof *sp);
+	sp->sp_lstchg = spent->sp_lstchg;
+	sp->sp_min    = spent->sp_min;
+	sp->sp_max    = spent->sp_max;
+	sp->sp_warn   = spent->sp_warn;
+	sp->sp_inact  = spent->sp_inact;
+	sp->sp_expire = spent->sp_expire;
+	sp->sp_flag   = spent->sp_flag;
+	/*@-mustfreeonly@*/
+	sp->sp_namp   = strdup (spent->sp_namp);
+	/*@=mustfreeonly@*/
 	if (NULL == sp->sp_namp) {
+		free(sp);
 		return NULL;
 	}
+	/*@-mustfreeonly@*/
 	sp->sp_pwdp = strdup (spent->sp_pwdp);
+	/*@=mustfreeonly@*/
 	if (NULL == sp->sp_pwdp) {
+		free(sp->sp_namp);
+		free(sp);
 		return NULL;
 	}
 
@@ -65,8 +80,10 @@
 void spw_free (/*@out@*/ /*@only@*/struct spwd *spent)
 {
 	free (spent->sp_namp);
-	memzero (spent->sp_pwdp, strlen (spent->sp_pwdp));
+	if (NULL != spent->sp_pwdp) {
-	free (spent->sp_pwdp);
+		memzero (spent->sp_pwdp, strlen (spent->sp_pwdp));
+		free (spent->sp_pwdp);
+	}
 	free (spent);
 }
 

lib/spawn.c

@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2011       , Jonathan Nieder
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the copyright holders or contributors may not be used to
+ *    endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include "exitcodes.h"
+#include "prototypes.h"
+
+int run_command (const char *cmd, const char *argv[],
+                 /*@null@*/const char *envp[], /*@out@*/int *status)
+{
+	pid_t pid, wpid;
+
+	if (NULL == envp) {
+		envp = (const char **)environ;
+	}
+
+	(void) fflush (stdout);
+	(void) fflush (stderr);
+
+	pid = fork ();
+	if (0 == pid) {
+		(void) execve (cmd, (char * const *) argv,
+		               (char * const *) envp);
+		if (ENOENT == errno) {
+			exit (E_CMD_NOTFOUND);
+		}
+		fprintf (stderr, "%s: cannot execute %s: %s\n",
+		         Prog, cmd, strerror (errno));
+		exit (E_CMD_NOEXEC);
+	} else if ((pid_t)-1 == pid) {
+		fprintf (stderr, "%s: cannot execute %s: %s\n",
+		         Prog, cmd, strerror (errno));
+		return -1;
+	}
+
+	do {
+		wpid = waitpid (pid, status, 0);
+	} while (   ((pid_t)-1 == wpid && errno == EINTR)
+	         || (wpid != pid));
+
+	if ((pid_t)-1 == wpid) {
+		fprintf (stderr, "%s: waitpid (status: %d): %s\n",
+		         Prog, *status, strerror (errno));
+		return -1;
+	}
+
+	return 0;
+}
+

lib/subordinateio.c

@@ -0,0 +1,701 @@
+/*
+ * Copyright (c) 2012 - Eric Biederman
+ */
+
+#include <config.h>
+
+#ifdef ENABLE_SUBIDS
+
+#include "prototypes.h"
+#include "defines.h"
+#include <stdio.h>
+#include "commonio.h"
+#include "subordinateio.h"
+#include <sys/types.h>
+#include <pwd.h>
+
+struct subordinate_range {
+	const char *owner;
+	unsigned long start;
+	unsigned long count;
+};
+
+#define NFIELDS 3
+
+/*
+ * subordinate_dup: create a duplicate range
+ *
+ * @ent: a pointer to a subordinate_range struct
+ *
+ * Returns a pointer to a newly allocated duplicate subordinate_range struct
+ * or NULL on failure
+ */
+static /*@null@*/ /*@only@*/void *subordinate_dup (const void *ent)
+{
+	const struct subordinate_range *rangeent = ent;
+	struct subordinate_range *range;
+
+	range = (struct subordinate_range *) malloc (sizeof *range);
+	if (NULL == range) {
+		return NULL;
+	}
+	range->owner = strdup (rangeent->owner);
+	if (NULL == range->owner) {
+		free(range);
+		return NULL;
+	}
+	range->start = rangeent->start;
+	range->count = rangeent->count;
+
+	return range;
+}
+
+/*
+ * subordinate_free: free a subordinate_range struct
+ *
+ * @ent: pointer to a subordinate_range struct to free.
+ */
+static void subordinate_free (/*@out@*/ /*@only@*/void *ent)
+{
+	struct subordinate_range *rangeent = ent;
+	
+	free ((void *)(rangeent->owner));
+	free (rangeent);
+}
+
+/*
+ * subordinate_parse:
+ *
+ * @line: a line to parse
+ *
+ * Returns a pointer to a subordinate_range struct representing the values
+ * in @line, or NULL on failure.  Note that the returned value should not
+ * be freed by the caller.
+ */
+static void *subordinate_parse (const char *line)
+{
+	static struct subordinate_range range;
+	static char rangebuf[1024];
+	int i;
+	char *cp;
+	char *fields[NFIELDS];
+
+	/*
+	 * Copy the string to a temporary buffer so the substrings can
+	 * be modified to be NULL terminated.
+	 */
+	if (strlen (line) >= sizeof rangebuf)
+		return NULL;	/* fail if too long */
+	strcpy (rangebuf, line);
+
+	/*
+	 * Save a pointer to the start of each colon separated
+	 * field.  The fields are converted into NUL terminated strings.
+	 */
+
+	for (cp = rangebuf, i = 0; (i < NFIELDS) && (NULL != cp); i++) {
+		fields[i] = cp;
+		while (('\0' != *cp) && (':' != *cp)) {
+			cp++;
+		}
+
+		if ('\0' != *cp) {
+			*cp = '\0';
+			cp++;
+		} else {
+			cp = NULL;
+		}
+	}
+
+	/*
+	 * There must be exactly NFIELDS colon separated fields or
+	 * the entry is invalid.  Also, fields must be non-blank.
+	 */
+	if (i != NFIELDS || *fields[0] == '\0' || *fields[1] == '\0' || *fields[2] == '\0')
+		return NULL;
+	range.owner = fields[0];
+	if (getulong (fields[1], &range.start) == 0)
+		return NULL;
+	if (getulong (fields[2], &range.count) == 0)
+		return NULL;
+
+	return &range;
+}
+
+/*
+ * subordinate_put: print a subordinate_range value to a file
+ *
+ * @ent: a pointer to a subordinate_range struct to print out.
+ * @file: file to which to print.
+ *
+ * Returns 0 on success, -1 on error.
+ */
+static int subordinate_put (const void *ent, FILE * file)
+{
+	const struct subordinate_range *range = ent;
+
+	return fprintf(file, "%s:%lu:%lu\n",
+			       range->owner,
+			       range->start,
+			       range->count) < 0 ? -1  : 0;
+}
+
+static struct commonio_ops subordinate_ops = {
+	subordinate_dup,	/* dup */
+	subordinate_free,	/* free */
+	NULL,			/* getname */
+	subordinate_parse,	/* parse */
+	subordinate_put,	/* put */
+	fgets,			/* fgets */
+	fputs,			/* fputs */
+	NULL,			/* open_hook */
+	NULL,			/* close_hook */
+};
+
+static /*@observer@*/ /*@null*/const struct subordinate_range *subordinate_next(struct commonio_db *db)
+{
+	return (const struct subordinate_range *)commonio_next (db);
+}
+
+/*
+ * range_exists: Check whether @owner owns any ranges
+ *
+ * @db: database to query
+ * @owner: owner being queried
+ *
+ * Returns true if @owner owns any subuid ranges, false otherwise.
+ */
+static const bool range_exists(struct commonio_db *db, const char *owner)
+{
+	const struct subordinate_range *range;
+	commonio_rewind(db);
+	while ((range = commonio_next(db)) != NULL) {
+		if (0 == strcmp(range->owner, owner))
+			return true;
+	}
+	return false;
+}
+
+/*
+ * find_range: find a range which @owner is authorized to use which includes
+ *             subuid @val.
+ *
+ * @db: database to query
+ * @owner: owning uid being queuried
+ * @val: subuid being searched for.
+ *
+ * Returns a range of subuids belonging to @owner and including the subuid
+ * @val, or NULL if no such range exists.
+ */
+static const struct subordinate_range *find_range(struct commonio_db *db,
+						  const char *owner, unsigned long val)
+{
+	const struct subordinate_range *range;
+
+	/*
+	 * Search for exact username/group specification
+	 *
+	 * This is the original method - go fast through the db, doing only
+	 * exact username/group string comparison. Therefore we leave it as-is
+	 * for the time being, in order to keep it equally fast as it was
+	 * before.
+	 */
+	commonio_rewind(db);
+	while ((range = commonio_next(db)) != NULL) {
+		unsigned long first = range->start;
+		unsigned long last = first + range->count - 1;
+
+		if (0 != strcmp(range->owner, owner))
+			continue;
+
+		if ((val >= first) && (val <= last))
+			return range;
+	}
+
+
+        /*
+         * We only do special handling for these two files
+         */
+        if ((0 != strcmp(db->filename, "/etc/subuid")) && (0 != strcmp(db->filename, "/etc/subgid")))
+                return NULL;
+
+        /*
+         * Search loop above did not produce any result. Let's rerun it,
+         * but this time try to matcha actual UIDs. The first entry that
+         * matches is considered a success.
+         * (It may be specified as literal UID or as another username which
+         * has the same UID as the username we are looking for.)
+         */
+        struct passwd *pwd;
+        uid_t          owner_uid;
+        char           owner_uid_string[33] = "";
+
+
+        /* Get UID of the username we are looking for */
+        pwd = getpwnam(owner);
+        if (NULL == pwd) {
+                /* Username not defined in /etc/passwd, or error occured during lookup */
+                return NULL;
+        }
+        owner_uid = pwd->pw_uid;
+        sprintf(owner_uid_string, "%lu", (unsigned long int)owner_uid);
+
+        commonio_rewind(db);
+        while ((range = commonio_next(db)) != NULL) {
+                unsigned long first = range->start;
+                unsigned long last = first + range->count - 1;
+
+                /* For performance reasons check range before using getpwnam() */
+                if ((val < first) || (val > last)) {
+                        continue;
+                }
+
+                /*
+                 * Range matches. Check if range owner is specified
+                 * as numeric UID and if it matches.
+                 */
+                if (0 == strcmp(range->owner, owner_uid_string)) {
+                        return range;
+                }
+
+                /*
+                 * Ok, this range owner is not specified as numeric UID
+                 * we are looking for. It may be specified as another
+                 * UID or as a literal username.
+                 *
+                 * If specified as another UID, the call to getpwnam()
+                 * will return NULL.
+                 *
+                 * If specified as literal username, we will get its
+                 * UID and compare that to UID we are looking for.
+                 */
+                const struct passwd *range_owner_pwd;
+
+                range_owner_pwd = getpwnam(range->owner);
+                if (NULL == range_owner_pwd) {
+                        continue;
+                }
+
+                if (owner_uid == range_owner_pwd->pw_uid) {
+                        return range;
+                }
+        }
+
+	return NULL;
+}
+
+/*
+ * have_range: check whether @owner is authorized to use the range
+ *             (@start .. @start+@count-1).
+ * @db: database to check
+ * @owner: owning uid being queried
+ * @start: start of range
+ * @count: number of uids in range
+ *
+ * Returns true if @owner is authorized to use the range, false otherwise.
+ */
+static bool have_range(struct commonio_db *db,
+		       const char *owner, unsigned long start, unsigned long count)
+{
+	const struct subordinate_range *range;
+	unsigned long end;
+
+	if (count == 0)
+		return false;
+
+	end = start + count - 1;
+	range = find_range (db, owner, start);
+	while (range) {
+		unsigned long last; 
+
+		last = range->start + range->count - 1;
+		if (last >= (start + count - 1))
+			return true;
+
+		count = end - last;
+		start = last + 1;
+		range = find_range(db, owner, start);
+	}
+	return false;
+}
+
+/*
+ * subordinate_range_cmp: compare uid ranges
+ *
+ * @p1: pointer to a commonio_entry struct to compare
+ * @p2: pointer to second commonio_entry struct to compare
+ *
+ * Returns 0 if the entries are the same.  Otherwise return -1
+ * if the range in p1 is lower than that in p2, or (if the ranges are
+ * equal) if the owning uid in p1 is lower than p2's.  Return 1 if p1's
+ * range or owning uid is great than p2's.
+ */
+static int subordinate_range_cmp (const void *p1, const void *p2)
+{
+	struct subordinate_range *range1, *range2;
+
+	if ((*(struct commonio_entry **) p1)->eptr == NULL)
+		return 1;
+	if ((*(struct commonio_entry **) p2)->eptr == NULL)
+		return -1;
+
+	range1 = ((struct subordinate_range *) (*(struct commonio_entry **) p1)->eptr);
+	range2 = ((struct subordinate_range *) (*(struct commonio_entry **) p2)->eptr);
+
+	if (range1->start < range2->start)
+		return -1;
+	else if (range1->start > range2->start)
+		return 1;
+	else if (range1->count < range2->count)
+		return -1;
+	else if (range1->count > range2->count)
+		return 1;
+	else
+		return strcmp(range1->owner, range2->owner);
+}
+
+/*
+ * find_free_range: find an unused consecutive sequence of ids to allocate
+ *                  to a user.
+ * @db: database to search
+ * @min: the first uid in the range to find
+ * @max: the highest uid to find
+ * @count: the number of uids needed
+ *
+ * Return the lowest new uid, or ULONG_MAX on failure.
+ */
+static unsigned long find_free_range(struct commonio_db *db,
+				     unsigned long min, unsigned long max,
+				     unsigned long count)
+{
+	const struct subordinate_range *range;
+	unsigned long low, high;
+
+	/* When given invalid parameters fail */
+	if ((count == 0) || (max < min))
+		goto fail;
+
+	/* Sort by range then by owner */
+	commonio_sort (db, subordinate_range_cmp);
+	commonio_rewind(db);
+
+	low = min;
+	while ((range = commonio_next(db)) != NULL) {
+		unsigned long first = range->start;
+		unsigned long last = first + range->count - 1;
+
+		/* Find the top end of the hole before this range */
+		high = first;
+
+		/* Don't allocate IDs after max (included) */
+		if (high > max + 1) {
+			high = max + 1;
+		}
+
+		/* Is the hole before this range large enough? */
+		if ((high > low) && ((high - low) >= count))
+			return low;
+
+		/* Compute the low end of the next hole */
+		if (low < (last + 1))
+			low = last + 1;
+		if (low > max)
+			goto fail;
+	}
+
+	/* Is the remaining unclaimed area large enough? */
+	if (((max - low) + 1) >= count)
+		return low;
+fail:
+	return ULONG_MAX;
+}
+
+/*
+ * add_range: add a subuid range to an owning uid's list of authorized
+ *            subuids.
+ * @db: database to which to add
+ * @owner: uid which owns the subuid
+ * @start: the first uid in the owned range
+ * @count: the number of uids in the range
+ *
+ * Return 1 if the range is already present or on succcess.  On error
+ * return 0 and set errno appropriately.
+ */
+static int add_range(struct commonio_db *db,
+	const char *owner, unsigned long start, unsigned long count)
+{
+	struct subordinate_range range;
+	range.owner = owner;
+	range.start = start;
+	range.count = count;
+
+	/* See if the range is already present */
+	if (have_range(db, owner, start, count))
+		return 1;
+
+	/* Otherwise append the range */
+	return commonio_append(db, &range);
+}
+
+/*
+ * remove_range:  remove a range of subuids from an owning uid's list
+ *                of authorized subuids.
+ * @db: database to work on
+ * @owner: owning uid whose range is being removed
+ * @start: start of the range to be removed
+ * @count: number of uids in the range.
+ *
+ * Returns 0 on failure, 1 on success.  Failure means that we needed to
+ * create a new range to represent the new limits, and failed doing so.
+ */
+static int remove_range (struct commonio_db *db,
+                         const char *owner,
+                         unsigned long start, unsigned long count)
+{
+	struct commonio_entry *ent;
+	unsigned long end;
+
+	if (count == 0) {
+		return 1;
+	}
+
+	end = start + count - 1;
+	for (ent = db->head; NULL != ent; ent = ent->next) {
+		struct subordinate_range *range = ent->eptr;
+		unsigned long first;
+		unsigned long last;
+
+		/* Skip unparsed entries */
+		if (NULL == range) {
+			continue;
+		}
+
+		first = range->start;
+		last = first + range->count - 1;
+
+		/* Skip entries with a different owner */
+		if (0 != strcmp (range->owner, owner)) {
+			continue;
+		}
+
+		/* Skip entries outside of the range to remove */
+		if ((end < first) || (start > last)) {
+			continue;
+		}
+
+		if (start <= first) {
+			if (end >= last) {
+				/* to be removed: [start,      end]
+				 * range:           [first, last] */
+				/* entry completely contained in the
+				 * range to remove */
+				commonio_del_entry (db, ent);
+			} else {
+				/* to be removed: [start,  end]
+				 * range:           [first, last] */
+				/* Remove only the start of the entry */
+				range->start = end + 1;
+				range->count = (last - range->start) + 1;
+
+				ent->changed = true;
+				db->changed = true;
+			}
+		} else {
+			if (end >= last) {
+				/* to be removed:   [start,  end]
+				 * range:         [first, last] */
+				/* Remove only the end of the entry */
+				range->count = start - range->start;
+
+				ent->changed = true;
+				db->changed = true;
+			} else {
+				/* to be removed:   [start, end]
+				 * range:         [first,    last] */
+				/* Remove the middle of the range
+				 * This requires to create a new range */
+				struct subordinate_range tail;
+				tail.owner = range->owner;
+				tail.start = end + 1;
+				tail.count = (last - tail.start) + 1;
+
+				if (commonio_append (db, &tail) == 0) {
+					return 0;
+				}
+
+				range->count = start - range->start;
+
+				ent->changed = true;
+				db->changed = true;
+			}
+		}
+	}
+
+	return 1;
+}
+
+static struct commonio_db subordinate_uid_db = {
+	"/etc/subuid",		/* filename */
+	&subordinate_ops,	/* ops */
+	NULL,			/* fp */
+#ifdef WITH_SELINUX
+	NULL,			/* scontext */
+#endif
+	0644,                   /* st_mode */
+	0,                      /* st_uid */
+	0,                      /* st_gid */
+	NULL,			/* head */
+	NULL,			/* tail */
+	NULL,			/* cursor */
+	false,			/* changed */
+	false,			/* isopen */
+	false,			/* locked */
+	false			/* readonly */
+};
+
+int sub_uid_setdbname (const char *filename)
+{
+	return commonio_setname (&subordinate_uid_db, filename);
+}
+
+/*@observer@*/const char *sub_uid_dbname (void)
+{
+	return subordinate_uid_db.filename;
+}
+
+bool sub_uid_file_present (void)
+{
+	return commonio_present (&subordinate_uid_db);
+}
+
+int sub_uid_lock (void)
+{
+	return commonio_lock (&subordinate_uid_db);
+}
+
+int sub_uid_open (int mode)
+{
+	return commonio_open (&subordinate_uid_db, mode);
+}
+
+bool sub_uid_assigned(const char *owner)
+{
+	return range_exists (&subordinate_uid_db, owner);
+}
+
+bool have_sub_uids(const char *owner, uid_t start, unsigned long count)
+{
+	return have_range (&subordinate_uid_db, owner, start, count);
+}
+
+int sub_uid_add (const char *owner, uid_t start, unsigned long count)
+{
+	return add_range (&subordinate_uid_db, owner, start, count);
+}
+
+int sub_uid_remove (const char *owner, uid_t start, unsigned long count)
+{
+	return remove_range (&subordinate_uid_db, owner, start, count);
+}
+
+int sub_uid_close (void)
+{
+	return commonio_close (&subordinate_uid_db);
+}
+
+int sub_uid_unlock (void)
+{
+	return commonio_unlock (&subordinate_uid_db);
+}
+
+uid_t sub_uid_find_free_range(uid_t min, uid_t max, unsigned long count)
+{
+	unsigned long start;
+	start = find_free_range (&subordinate_uid_db, min, max, count);
+	return start == ULONG_MAX ? (uid_t) -1 : start;
+}
+
+static struct commonio_db subordinate_gid_db = {
+	"/etc/subgid",		/* filename */
+	&subordinate_ops,	/* ops */
+	NULL,			/* fp */
+#ifdef WITH_SELINUX
+	NULL,			/* scontext */
+#endif
+	0644,                   /* st_mode */
+	0,                      /* st_uid */
+	0,                      /* st_gid */
+	NULL,			/* head */
+	NULL,			/* tail */
+	NULL,			/* cursor */
+	false,			/* changed */
+	false,			/* isopen */
+	false,			/* locked */
+	false			/* readonly */
+};
+
+int sub_gid_setdbname (const char *filename)
+{
+	return commonio_setname (&subordinate_gid_db, filename);
+}
+
+/*@observer@*/const char *sub_gid_dbname (void)
+{
+	return subordinate_gid_db.filename;
+}
+
+bool sub_gid_file_present (void)
+{
+	return commonio_present (&subordinate_gid_db);
+}
+
+int sub_gid_lock (void)
+{
+	return commonio_lock (&subordinate_gid_db);
+}
+
+int sub_gid_open (int mode)
+{
+	return commonio_open (&subordinate_gid_db, mode);
+}
+
+bool have_sub_gids(const char *owner, gid_t start, unsigned long count)
+{
+	return have_range(&subordinate_gid_db, owner, start, count);
+}
+
+bool sub_gid_assigned(const char *owner)
+{
+	return range_exists (&subordinate_gid_db, owner);
+}
+
+int sub_gid_add (const char *owner, gid_t start, unsigned long count)
+{
+	return add_range (&subordinate_gid_db, owner, start, count);
+}
+
+int sub_gid_remove (const char *owner, gid_t start, unsigned long count)
+{
+	return remove_range (&subordinate_gid_db, owner, start, count);
+}
+
+int sub_gid_close (void)
+{
+	return commonio_close (&subordinate_gid_db);
+}
+
+int sub_gid_unlock (void)
+{
+	return commonio_unlock (&subordinate_gid_db);
+}
+
+gid_t sub_gid_find_free_range(gid_t min, gid_t max, unsigned long count)
+{
+	unsigned long start;
+	start = find_free_range (&subordinate_gid_db, min, max, count);
+	return start == ULONG_MAX ? (gid_t) -1 : start;
+}
+#else				/* !ENABLE_SUBIDS */
+extern int errno;		/* warning: ANSI C forbids an empty source file */
+#endif				/* !ENABLE_SUBIDS */
+

lib/subordinateio.h

@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2012- Eric W. Biederman
+ */
+
+#ifndef _SUBORDINATEIO_H
+#define _SUBORDINATEIO_H
+
+#include <config.h>
+
+#ifdef ENABLE_SUBIDS
+
+#include <sys/types.h>
+
+extern int sub_uid_close(void);
+extern bool have_sub_uids(const char *owner, uid_t start, unsigned long count);
+extern bool sub_uid_file_present (void);
+extern bool sub_uid_assigned(const char *owner);
+extern int sub_uid_lock (void);
+extern int sub_uid_setdbname (const char *filename);
+extern /*@observer@*/const char *sub_uid_dbname (void);
+extern int sub_uid_open (int mode);
+extern int sub_uid_unlock (void);
+extern int sub_uid_add (const char *owner, uid_t start, unsigned long count);
+extern int sub_uid_remove (const char *owner, uid_t start, unsigned long count);
+extern uid_t sub_uid_find_free_range(uid_t min, uid_t max, unsigned long count);
+
+extern int sub_gid_close(void);
+extern bool have_sub_gids(const char *owner, gid_t start, unsigned long count);
+extern bool sub_gid_file_present (void);
+extern bool sub_gid_assigned(const char *owner);
+extern int sub_gid_lock (void);
+extern int sub_gid_setdbname (const char *filename);
+extern /*@observer@*/const char *sub_gid_dbname (void);
+extern int sub_gid_open (int mode);
+extern int sub_gid_unlock (void);
+extern int sub_gid_add (const char *owner, gid_t start, unsigned long count);
+extern int sub_gid_remove (const char *owner, gid_t start, unsigned long count);
+extern uid_t sub_gid_find_free_range(gid_t min, gid_t max, unsigned long count);
+#endif				/* ENABLE_SUBIDS */
+
+#endif

lib/tcbfuncs.c

@@ -0,0 +1,613 @@
+/*
+ * Copyright (c) 2001 Rafal Wojtczuk, Solar Designer
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#define _GNU_SOURCE
+
+#include <errno.h>
+#include <fcntl.h>
+#include <grp.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <tcb.h>
+#include <unistd.h>
+
+#include "config.h"
+
+#include "defines.h"
+#include "prototypes.h"
+#include "getdef.h"
+#include "shadowio.h"
+#include "tcbfuncs.h"
+
+#define SHADOWTCB_HASH_BY 1000
+#define SHADOWTCB_LOCK_SUFFIX ".lock"
+
+static /*@null@*//*@only@*/char *stored_tcb_user = NULL;
+
+shadowtcb_status shadowtcb_drop_priv (void)
+{
+	if (!getdef_bool ("USE_TCB")) {
+		return SHADOWTCB_SUCCESS;
+	}
+
+	if (NULL != stored_tcb_user) {
+		if (tcb_drop_priv (stored_tcb_user) == 0) {
+			return SHADOWTCB_SUCCESS;
+		}
+	}
+
+	return SHADOWTCB_FAILURE;
+}
+
+shadowtcb_status shadowtcb_gain_priv (void)
+{
+	if (!getdef_bool ("USE_TCB")) {
+		return SHADOWTCB_SUCCESS;
+	}
+
+	return (tcb_gain_priv () == 0) ? SHADOWTCB_SUCCESS : SHADOWTCB_FAILURE;
+}
+
+/* In case something goes wrong, we return immediately, not polluting the
+ * code with free(). All errors are fatal, so the application is expected
+ * to exit soon.
+ */
+#define OUT_OF_MEMORY do { \
+	fprintf (stderr, _("%s: out of memory\n"), Prog); \
+	(void) fflush (stderr); \
+} while (false)
+
+/* Returns user's tcb directory path relative to TCB_DIR. */
+static /*@null@*/ char *shadowtcb_path_rel (const char *name, uid_t uid)
+{
+	char *ret;
+
+	if (!getdef_bool ("TCB_SYMLINKS") || uid < SHADOWTCB_HASH_BY) {
+		if (asprintf (&ret, "%s", name) == -1) {
+			OUT_OF_MEMORY;
+			return NULL;
+		}
+	} else if (uid < SHADOWTCB_HASH_BY * SHADOWTCB_HASH_BY) {
+		if (asprintf (&ret, ":%dK/%s",
+		              uid / SHADOWTCB_HASH_BY, name) == -1) {
+			OUT_OF_MEMORY;
+			return NULL;
+		}
+	} else {
+		if (asprintf (&ret, ":%dM/:%dK/%s",
+		              uid / (SHADOWTCB_HASH_BY * SHADOWTCB_HASH_BY),
+		              (uid % (SHADOWTCB_HASH_BY * SHADOWTCB_HASH_BY)) / SHADOWTCB_HASH_BY,
+			name) == -1) {
+			OUT_OF_MEMORY;
+			return NULL;
+		}
+	}
+	return ret;
+}
+
+static /*@null@*/ char *shadowtcb_path_rel_existing (const char *name)
+{
+	char *path, *rval;
+	struct stat st;
+	char link[8192];
+	ssize_t ret;
+
+	if (asprintf (&path, TCB_DIR "/%s", name) == -1) {
+		OUT_OF_MEMORY;
+		return NULL;
+	}
+	if (lstat (path, &st) != 0) {
+		fprintf (stderr,
+		         _("%s: Cannot stat %s: %s\n"),
+		         Prog, path, strerror (errno));
+		free (path);
+		return NULL;
+	}
+	if (S_ISDIR (st.st_mode)) {
+		free (path);
+		rval = strdup (name);
+		if (NULL == rval) {
+			OUT_OF_MEMORY;
+			return NULL;
+		}
+		return rval;
+	}
+	if (!S_ISLNK (st.st_mode)) {
+		fprintf (stderr,
+		         _("%s: %s is neither a directory, nor a symlink.\n"),
+		         Prog, path);
+		free (path);
+		return NULL;
+	}
+	ret = readlink (path, link, sizeof (link) - 1);
+	if (-1 == ret) {
+		fprintf (stderr,
+		         _("%s: Cannot read symbolic link %s: %s\n"),
+		         Prog, path, strerror (errno));
+		free (path);
+		return NULL;
+	}
+	free (path);
+	if ((size_t)ret >= sizeof(link) - 1) {
+		link[sizeof(link) - 1] = '\0';
+		fprintf (stderr,
+		         _("%s: Suspiciously long symlink: %s\n"),
+		         Prog, link);
+		return NULL;
+	}
+	link[(size_t)ret] = '\0';
+	rval = strdup (link);
+	if (NULL == rval) {
+		OUT_OF_MEMORY;
+		return NULL;
+	}
+	return rval;
+}
+
+static /*@null@*/ char *shadowtcb_path (const char *name, uid_t uid)
+{
+	char *ret, *rel;
+
+	rel = shadowtcb_path_rel (name, uid);
+	if (NULL == rel) {
+		return NULL;
+	}
+	if (asprintf (&ret, TCB_DIR "/%s", rel) == -1) {
+		OUT_OF_MEMORY;
+		free (rel);
+		return NULL;
+	}
+	free (rel);
+	return ret;
+}
+
+static /*@null@*/ char *shadowtcb_path_existing (const char *name)
+{
+	char *ret, *rel;
+
+	rel = shadowtcb_path_rel_existing (name);
+	if (NULL == rel) {
+		return NULL;
+	}
+	if (asprintf (&ret, TCB_DIR "/%s", rel) == -1) {
+		OUT_OF_MEMORY;
+		free (rel);
+		return NULL;
+	}
+	free (rel);
+	return ret;
+}
+
+static shadowtcb_status mkdir_leading (const char *name, uid_t uid)
+{
+	char *ind, *dir, *ptr, *path = shadowtcb_path_rel (name, uid);
+	struct stat st;
+
+	if (NULL == path) {
+		return SHADOWTCB_FAILURE;
+	}
+	ptr = path;
+	if (stat (TCB_DIR, &st) != 0) {
+		fprintf (stderr,
+		         _("%s: Cannot stat %s: %s\n"),
+		         Prog, TCB_DIR, strerror (errno));
+		goto out_free_path;
+	}
+	while ((ind = strchr (ptr, '/'))) {
+		*ind = '\0';
+		if (asprintf (&dir, TCB_DIR "/%s", path) == -1) {
+			OUT_OF_MEMORY;
+			return SHADOWTCB_FAILURE;
+		}
+		if ((mkdir (dir, 0700) != 0) && (errno != EEXIST)) {
+			fprintf (stderr,
+			         _("%s: Cannot create directory %s: %s\n"),
+			         Prog, dir, strerror (errno));
+			goto out_free_dir;
+		}
+		if (chown (dir, 0, st.st_gid) != 0) {
+			fprintf (stderr,
+			         _("%s: Cannot change owner of %s: %s\n"),
+			         Prog, dir, strerror (errno));
+			goto out_free_dir;
+		}
+		if (chmod (dir, 0711) != 0) {
+			fprintf (stderr,
+			         _("%s: Cannot change mode of %s: %s\n"),
+			         Prog, dir, strerror (errno));
+			goto out_free_dir;
+		}
+		free (dir);
+		*ind = '/';
+		ptr = ind + 1;
+	}
+	free (path);
+	return SHADOWTCB_SUCCESS;
+out_free_dir:
+	free (dir);
+out_free_path:
+	free (path);
+	return SHADOWTCB_FAILURE;
+}
+
+static shadowtcb_status unlink_suffs (const char *user)
+{
+	static char *suffs[] = { "+", "-", SHADOWTCB_LOCK_SUFFIX };
+	char *tmp;
+	int i;
+
+	for (i = 0; i < 3; i++) {
+		if (asprintf (&tmp, TCB_FMT "%s", user, suffs[i]) == -1) {
+			OUT_OF_MEMORY;
+			return SHADOWTCB_FAILURE;
+		}
+		if ((unlink (tmp) != 0) && (errno != ENOENT)) {
+			fprintf (stderr,
+			         _("%s: unlink: %s: %s\n"),
+			         Prog, tmp, strerror (errno));
+			free (tmp);
+			return SHADOWTCB_FAILURE;
+		}
+		free (tmp);
+	}
+
+	return SHADOWTCB_SUCCESS;
+}
+
+/* path should be a relative existing tcb directory */
+static shadowtcb_status rmdir_leading (char *path)
+{
+	char *ind, *dir;
+	shadowtcb_status ret = SHADOWTCB_SUCCESS;
+	while ((ind = strrchr (path, '/'))) {
+		*ind = '\0';
+		if (asprintf (&dir, TCB_DIR "/%s", path) == -1) {
+			OUT_OF_MEMORY;
+			return SHADOWTCB_FAILURE;
+		}
+		if (rmdir (dir) != 0) {
+			if (errno != ENOTEMPTY) {
+				fprintf (stderr,
+				         _("%s: Cannot remove directory %s: %s\n"),
+				         Prog, dir, strerror (errno));
+				ret = SHADOWTCB_FAILURE;
+			}
+			free (dir);
+			break;
+		}
+		free (dir);
+	}
+	return ret;
+}
+
+static shadowtcb_status move_dir (const char *user_newname, uid_t user_newid)
+{
+	char *olddir = NULL, *newdir = NULL;
+	char *real_old_dir = NULL, *real_new_dir = NULL;
+	char *real_old_dir_rel = NULL, *real_new_dir_rel = NULL;
+	uid_t old_uid, the_newid;
+	struct stat oldmode;
+	shadowtcb_status ret = SHADOWTCB_FAILURE;
+
+	if (NULL == stored_tcb_user) {
+		return SHADOWTCB_FAILURE;
+	}
+	if (asprintf (&olddir, TCB_DIR "/%s", stored_tcb_user) == -1) {
+		goto out_free_nomem;
+	}
+	if (stat (olddir, &oldmode) != 0) {
+		fprintf (stderr,
+		         _("%s: Cannot stat %s: %s\n"),
+		         Prog, olddir, strerror (errno));
+		goto out_free;
+	}
+	old_uid = oldmode.st_uid;
+	the_newid = (user_newid == -1) ? old_uid : user_newid;
+	real_old_dir = shadowtcb_path_existing (stored_tcb_user);
+	if (NULL == real_old_dir) {
+		goto out_free;
+	}
+	real_new_dir = shadowtcb_path (user_newname, the_newid);
+	if (NULL == real_new_dir) {
+		goto out_free;
+	}
+	if (strcmp (real_old_dir, real_new_dir) == 0) {
+		ret = SHADOWTCB_SUCCESS;
+		goto out_free;
+	}
+	real_old_dir_rel = shadowtcb_path_rel_existing (stored_tcb_user);
+	if (NULL == real_old_dir_rel) {
+		goto out_free;
+	}
+	if (mkdir_leading (user_newname, the_newid) == SHADOWTCB_FAILURE) {
+		goto out_free;
+	}
+	if (rename (real_old_dir, real_new_dir) != 0) {
+		fprintf (stderr,
+		         _("%s: Cannot rename %s to %s: %s\n"),
+		         Prog, real_old_dir, real_new_dir, strerror (errno));
+		goto out_free;
+	}
+	if (rmdir_leading (real_old_dir_rel) == SHADOWTCB_FAILURE) {
+		goto out_free;
+	}
+	if ((unlink (olddir) != 0) && (errno != ENOENT)) {
+		fprintf (stderr,
+		         _("%s: Cannot remove %s: %s\n"),
+		         Prog, olddir, strerror (errno));
+		goto out_free;
+	}
+	if (asprintf (&newdir, TCB_DIR "/%s", user_newname) == -1) {
+		goto out_free_nomem;
+	}
+	real_new_dir_rel = shadowtcb_path_rel (user_newname, the_newid);
+	if (NULL == real_new_dir_rel) {
+		goto out_free;
+	}
+	if (   (strcmp (real_new_dir, newdir) != 0)
+	    && (symlink (real_new_dir_rel, newdir) != 0)) {
+		fprintf (stderr,
+		         _("%s: Cannot create symbolic link %s: %s\n"),
+		         Prog, real_new_dir_rel, strerror (errno));
+		goto out_free;
+	}
+	ret = SHADOWTCB_SUCCESS;
+	goto out_free;
+out_free_nomem:
+	OUT_OF_MEMORY;
+out_free:
+	free (olddir);
+	free (newdir);
+	free (real_old_dir);
+	free (real_new_dir);
+	free (real_old_dir_rel);
+	free (real_new_dir_rel);
+	return ret;
+}
+
+shadowtcb_status shadowtcb_set_user (const char* name)
+{
+	char *buf;
+	shadowtcb_status retval;
+
+	if (!getdef_bool ("USE_TCB")) {
+		return SHADOWTCB_SUCCESS;
+	}
+
+	if (NULL != stored_tcb_user) {
+		free (stored_tcb_user);
+	}
+
+	stored_tcb_user = strdup (name);
+	if (NULL == stored_tcb_user) {
+		OUT_OF_MEMORY;
+		return SHADOWTCB_FAILURE;
+	}
+	if (asprintf (&buf, TCB_FMT, name) == -1) {
+		OUT_OF_MEMORY;
+		return SHADOWTCB_FAILURE;
+	}
+
+	retval = (spw_setdbname (buf) != 0) ? SHADOWTCB_SUCCESS : SHADOWTCB_FAILURE;
+	free (buf);
+	return retval;
+}
+
+/* tcb directory must be empty before shadowtcb_remove is called. */
+shadowtcb_status shadowtcb_remove (const char *name)
+{
+	shadowtcb_status ret = SHADOWTCB_SUCCESS;
+	char *path = shadowtcb_path_existing (name);
+	char *rel = shadowtcb_path_rel_existing (name);
+	if ((NULL == path) || (NULL == rel) || (rmdir (path) != 0)) {
+		return SHADOWTCB_FAILURE;
+	}
+	if (rmdir_leading (rel) == SHADOWTCB_FAILURE) {
+		return SHADOWTCB_FAILURE;
+	}
+	free (path);
+	free (rel);
+	if (asprintf (&path, TCB_DIR "/%s", name) == -1) {
+		OUT_OF_MEMORY;
+		return SHADOWTCB_FAILURE;
+	}
+	if ((unlink (path) != 0) && (errno != ENOENT)) {
+		ret = SHADOWTCB_FAILURE;
+	}
+	free (path);
+	return ret;
+}
+
+shadowtcb_status shadowtcb_move (/*@NULL@*/const char *user_newname, uid_t user_newid)
+{
+	struct stat dirmode, filemode;
+	char *tcbdir, *shadow;
+	shadowtcb_status ret = SHADOWTCB_FAILURE;
+
+	if (!getdef_bool ("USE_TCB")) {
+		return SHADOWTCB_SUCCESS;
+	}
+	if (NULL == stored_tcb_user) {
+		return SHADOWTCB_FAILURE;
+	}
+	if (NULL == user_newname) {
+		user_newname = stored_tcb_user;
+	}
+	if (move_dir (user_newname, user_newid) == SHADOWTCB_FAILURE) {
+		return SHADOWTCB_FAILURE;
+	}
+	if (-1 == user_newid) {
+		return SHADOWTCB_SUCCESS;
+	}
+	if (   (asprintf (&tcbdir, TCB_DIR "/%s", user_newname) == -1)
+	    || (asprintf (&shadow, TCB_FMT, user_newname) == -1)) {
+		OUT_OF_MEMORY;
+		return SHADOWTCB_FAILURE;
+	}
+	if (stat (tcbdir, &dirmode) != 0) {
+		fprintf (stderr,
+		         _("%s: Cannot stat %s: %s\n"),
+		         Prog, tcbdir, strerror (errno));
+		goto out_free;
+	}
+	if (chown (tcbdir, 0, 0) != 0) {
+		fprintf (stderr,
+		         _("%s: Cannot change owners of %s: %s\n"),
+		         Prog, tcbdir, strerror (errno));
+		goto out_free;
+	}
+	if (chmod (tcbdir, 0700) != 0) {
+		fprintf (stderr,
+		         _("%s: Cannot change mode of %s: %s\n"),
+		         Prog, tcbdir, strerror (errno));
+		goto out_free;
+	}
+	if (lstat (shadow, &filemode) != 0) {
+		if (errno != ENOENT) {
+			fprintf (stderr,
+			         _("%s: Cannot lstat %s: %s\n"),
+			         Prog, shadow, strerror (errno));
+			goto out_free;
+		}
+		fprintf (stderr,
+		         _("%s: Warning, user %s has no tcb shadow file.\n"),
+		         Prog, user_newname);
+	} else {
+		if (!S_ISREG (filemode.st_mode) ||
+			filemode.st_nlink != 1) {
+			fprintf (stderr,
+			         _("%s: Emergency: %s's tcb shadow is not a "
+			           "regular file with st_nlink=1.\n"
+			           "The account is left locked.\n"),
+			         Prog, user_newname);
+			goto out_free;
+		}
+		if (chown (shadow, user_newid, filemode.st_gid) != 0) {
+			fprintf (stderr,
+			         _("%s: Cannot change owner of %s: %s\n"),
+			         Prog, shadow, strerror (errno));
+			goto out_free;
+		}
+		if (chmod (shadow, filemode.st_mode & 07777) != 0) {
+			fprintf (stderr,
+			         _("%s: Cannot change mode of %s: %s\n"),
+			         Prog, shadow, strerror (errno));
+			goto out_free;
+		}
+	}
+	if (unlink_suffs (user_newname) == SHADOWTCB_FAILURE) {
+		goto out_free;
+	}
+	if (chown (tcbdir, user_newid, dirmode.st_gid) != 0) {
+		fprintf (stderr,
+		         _("%s: Cannot change owner of %s: %s\n"),
+		         Prog, tcbdir, strerror (errno));
+		goto out_free;
+	}
+	ret = SHADOWTCB_SUCCESS;
+out_free:
+	free (tcbdir);
+	free (shadow);
+	return ret;
+}
+
+shadowtcb_status shadowtcb_create (const char *name, uid_t uid)
+{
+	char *dir, *shadow;
+	struct stat tcbdir_stat;
+	gid_t shadowgid, authgid;
+	struct group *gr;
+	int fd;
+	shadowtcb_status ret = SHADOWTCB_FAILURE;
+
+	if (!getdef_bool ("USE_TCB")) {
+		return SHADOWTCB_SUCCESS;
+	}
+	if (stat (TCB_DIR, &tcbdir_stat) != 0) {
+		fprintf (stderr,
+		         _("%s: Cannot stat %s: %s\n"),
+		         Prog, TCB_DIR, strerror (errno));
+		return SHADOWTCB_FAILURE;
+	}
+	shadowgid = tcbdir_stat.st_gid;
+	authgid = shadowgid;
+	if (getdef_bool ("TCB_AUTH_GROUP")) {
+		gr = getgrnam ("auth");
+		if (NULL != gr) {
+			authgid = gr->gr_gid;
+		}
+	}
+
+	if (   (asprintf (&dir, TCB_DIR "/%s", name) == -1)
+	    || (asprintf (&shadow, TCB_FMT, name) == -1)) {
+		OUT_OF_MEMORY;
+		return SHADOWTCB_FAILURE;
+	}
+	if (mkdir (dir, 0700) != 0) {
+		fprintf (stderr,
+		         _("%s: mkdir: %s: %s\n"),
+		         Prog, dir, strerror (errno));
+		goto out_free;
+	}
+	fd = open (shadow, O_RDWR | O_CREAT | O_TRUNC, 0600);
+	if (fd < 0) {
+		fprintf (stderr,
+		         _("%s: Cannot open %s: %s\n"),
+		         Prog, shadow, strerror (errno));
+		goto out_free;
+	}
+	close (fd);
+	if (chown (shadow, 0, authgid) != 0) {
+		fprintf (stderr,
+		         _("%s: Cannot change owner of %s: %s\n"),
+		         Prog, shadow, strerror (errno));
+		goto out_free;
+	}
+	if (chmod (shadow, (mode_t) ((authgid == shadowgid) ? 0600 : 0640)) != 0) {
+		fprintf (stderr,
+		         _("%s: Cannot change mode of %s: %s\n"),
+		         Prog, shadow, strerror (errno));
+		goto out_free;
+	}
+	if (chown (dir, 0, authgid) != 0) {
+		fprintf (stderr,
+		         _("%s: Cannot change owner of %s: %s\n"),
+		         Prog, dir, strerror (errno));
+		goto out_free;
+	}
+	if (chmod (dir, (mode_t) ((authgid == shadowgid) ? 02700 : 02710)) != 0) {
+		fprintf (stderr,
+		         _("%s: Cannot change mode of %s: %s\n"),
+		         Prog, dir, strerror (errno));
+		goto out_free;
+	}
+	if (   (shadowtcb_set_user (name) == SHADOWTCB_FAILURE)
+	    || (shadowtcb_move (NULL, uid) == SHADOWTCB_FAILURE)) {
+		goto out_free;
+	}
+	ret = SHADOWTCB_SUCCESS;
+out_free:
+	free (dir);
+	free (shadow);
+	return ret;
+}
+

lib/tcbfuncs.h

@@ -0,0 +1,19 @@
+#ifndef _TCBFUNCS_H
+#define _TCBFUNCS_H
+
+#include <sys/types.h>
+
+typedef enum {
+	SHADOWTCB_FAILURE = 0,
+	SHADOWTCB_SUCCESS = 1
+} shadowtcb_status;
+
+extern shadowtcb_status shadowtcb_drop_priv (void);
+extern shadowtcb_status shadowtcb_gain_priv (void);
+extern shadowtcb_status shadowtcb_set_user (const char *name);
+extern shadowtcb_status shadowtcb_remove (const char *name);
+extern shadowtcb_status shadowtcb_move (/*@null@*/const char *user_newname,
+                                        uid_t user_newid);
+extern shadowtcb_status shadowtcb_create (const char *name, uid_t uid);
+
+#endif

lib/utent.c

@@ -88,25 +88,6 @@ struct utmp *getutent (void)
 
 	return &utmp_buf;
 }
-
-/*
- * getutline - get the utmp entry matching ut_line
- */
-
-struct utmp *getutline (const struct utmp *utent)
-{
-	struct utmp save;
-	struct utmp *new;
-
-	save = *utent;
-	while (new = getutent ())
-		if (strncmp (new->ut_line, save.ut_line, sizeof new->ut_line))
-			continue;
-		else
-			return new;
-
-	return (struct utmp *) 0;
-}
 #else
 extern int errno;		/* warning: ANSI C forbids an empty source file */
 #endif

libmisc/Makefile.am

@@ -23,14 +23,17 @@ libmisc_a_SOURCES = \
 	env.c \
 	failure.c \
 	failure.h \
-	fields.c \
 	find_new_gid.c \
 	find_new_uid.c \
+	find_new_sub_gids.c \
+	find_new_sub_uids.c \
 	getdate.h \
 	getdate.y \
 	getgr_nam_gid.c \
 	getrange.c \
 	hushed.c \
+	idmapping.h \
+	idmapping.c \
 	isexpired.c \
 	limits.c \
 	list.c log.c \
@@ -44,12 +47,13 @@ libmisc_a_SOURCES = \
 	pwd2spwd.c \
 	pwdcheck.c \
 	pwd_init.c \
+	remove_tree.c \
 	rlogin.c \
+	root_flag.c \
 	salt.c \
 	setugid.c \
 	setupenv.c \
 	shell.c \
-	system.c \
 	strtoday.c \
 	sub.c \
 	sulog.c \

libmisc/addgrps.c

@@ -71,7 +71,11 @@ int add_groups (const char *list)
 			return -1;
 		}
 		ngroups = getgroups (i, grouplist);
-		if ((-1 == ngroups) || (i > (size_t)ngroups)) {
+		if (   (   (-1 == ngroups)
+		        && (EINVAL != errno))
+		    || (i > (size_t)ngroups)) {
+			/* Unexpected failure of getgroups or successful
+			 * reception of the groups */
 			break;
 		}
 		/* not enough room, so try allocating a larger buffer */

libmisc/audit_help.c

@@ -76,7 +76,7 @@ void audit_help_open (void)
  * id  -  uid or gid that the operation is being performed on. This is used
  *	  only when user is NULL.
  */
-void audit_logger (int type, const char *pgname, const char *op,
+void audit_logger (int type, unused const char *pgname, const char *op,
                    const char *name, unsigned int id,
                    shadow_audit_result result)
 {
@@ -84,7 +84,7 @@ void audit_logger (int type, const char *pgname, const char *op,
 		return;
 	} else {
 		audit_log_acct_message (audit_fd, type, NULL, op, name, id,
-					NULL, NULL, NULL, (int) result);
+		                        NULL, NULL, NULL, (int) result);
 	}
 }
 

libmisc/basename.c

@@ -42,9 +42,9 @@
 
 #include "defines.h"
 #include "prototypes.h"
-char *Basename (char *str)
+/*@observer@*/const char *Basename (const char *str)
 {
 	char *cp = strrchr (str, '/');
 
-	return cp ? cp + 1 : str;
+	return (NULL != cp) ? cp + 1 : str;
 }

libmisc/chowndir.c

@@ -2,6 +2,7 @@
  * Copyright (c) 1992 - 1993, Julianne Frances Haugh
  * Copyright (c) 1996 - 2000, Marek Michałkiewicz
  * Copyright (c) 2003 - 2005, Tomasz Kłoczko
+ * Copyright (c) 2010 -     , Nicolas François
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -44,59 +45,92 @@
  *
  *	chown_dir() walks a directory tree and changes the ownership
  *	of all files owned by the provided user ID.
+ *
+ *	Only files owned (resp. group-owned) by old_uid (resp. by old_gid)
+ *	will have their ownership (resp. group-ownership) modified, unless
+ *	old_uid (resp. old_gid) is set to -1.
+ *
+ *	new_uid and new_gid can be set to -1 to indicate that no owner or
+ *	group-owner shall be changed.
  */
-int
+int chown_tree (const char *root,
-chown_tree (const char *root, uid_t old_uid, uid_t new_uid, gid_t old_gid,
+                uid_t old_uid,
-	    gid_t new_gid)
+                uid_t new_uid,
+                gid_t old_gid,
+                gid_t new_gid)
 {
-	char new_name[1024];
+	char *new_name;
+	size_t new_name_len;
 	int rc = 0;
 	struct DIRECT *ent;
 	struct stat sb;
 	DIR *dir;
 
+	new_name = malloc (1024);
+	if (NULL == new_name) {
+		return -1;
+	}
+	new_name_len = 1024;
+
 	/*
 	 * Make certain the directory exists.  This routine is called
-	 * directory by the invoker, or recursively.
+	 * directly by the invoker, or recursively.
 	 */
 
-	if (access (root, F_OK) != 0)
+	if (access (root, F_OK) != 0) {
+		free (new_name);
 		return -1;
+	}
 
 	/*
 	 * Open the directory and read each entry.  Every entry is tested
 	 * to see if it is a directory, and if so this routine is called
-	 * recursively.  If not, it is checked to see if it is owned by
+	 * recursively.  If not, it is checked to see if an ownership
-	 * old user ID.
+	 * shall be changed.
 	 */
 
-	if (!(dir = opendir (root)))
+	dir = opendir (root);
+	if (NULL == dir) {
+		free (new_name);
 		return -1;
+	}
 
 	while ((ent = readdir (dir))) {
+		size_t ent_name_len;
+		uid_t tmpuid = (uid_t) -1;
+		gid_t tmpgid = (gid_t) -1;
 
 		/*
 		 * Skip the "." and ".." entries
 		 */
 
-		if (strcmp (ent->d_name, ".") == 0 ||
+		if (   (strcmp (ent->d_name, ".") == 0)
-		    strcmp (ent->d_name, "..") == 0)
+		    || (strcmp (ent->d_name, "..") == 0)) {
 			continue;
+		}
 
 		/*
 		 * Make the filename for both the source and the
 		 * destination files.
 		 */
 
-		if (strlen (root) + strlen (ent->d_name) + 2 > sizeof new_name)
+		ent_name_len = strlen (root) + strlen (ent->d_name) + 2;
-			break;
+		if (ent_name_len > new_name_len) {
+			/*@only@*/char *tmp = realloc (new_name, ent_name_len);
+			if (NULL == tmp) {
+				rc = -1;
+				break;
+			}
+			new_name = tmp;
+			new_name_len = ent_name_len;
+		}
 
-		snprintf (new_name, sizeof new_name, "%s/%s", root,
+		(void) snprintf (new_name, new_name_len, "%s/%s", root, ent->d_name);
-			  ent->d_name);
 
 		/* Don't follow symbolic links! */
-		if (LSTAT (new_name, &sb) == -1)
+		if (LSTAT (new_name, &sb) == -1) {
 			continue;
+		}
 
 		if (S_ISDIR (sb.st_mode) && !S_ISLNK (sb.st_mode)) {
 
@@ -112,25 +146,56 @@ chown_tree (const char *root, uid_t old_uid, uid_t new_uid, gid_t old_gid,
 		}
 #ifndef HAVE_LCHOWN
 		/* don't use chown (follows symbolic links!) */
-		if (S_ISLNK (sb.st_mode))
+		if (S_ISLNK (sb.st_mode)) {
 			continue;
+		}
 #endif
-		if (sb.st_uid == old_uid)
+		/*
-			LCHOWN (new_name, new_uid,
+		 * By default, the IDs are not changed (-1).
-				sb.st_gid == old_gid ? new_gid : sb.st_gid);
+		 *
+		 * If the file is not owned by the user, the owner is not
+		 * changed.
+		 *
+		 * If the file is not group-owned by the group, the
+		 * group-owner is not changed.
+		 */
+		if (((uid_t) -1 == old_uid) || (sb.st_uid == old_uid)) {
+			tmpuid = new_uid;
+		}
+		if (((gid_t) -1 == old_gid) || (sb.st_gid == old_gid)) {
+			tmpgid = new_gid;
+		}
+		if (((uid_t) -1 != tmpuid) || ((gid_t) -1 != tmpgid)) {
+			rc = LCHOWN (new_name, tmpuid, tmpgid);
+			if (0 != rc) {
+				break;
+			}
+		}
 	}
+
+	free (new_name);
 	(void) closedir (dir);
 
 	/*
 	 * Now do the root of the tree
 	 */
 
-	if (stat (root, &sb) == 0) {
+	if ((0 == rc) && (stat (root, &sb) == 0)) {
-		if (sb.st_uid == old_uid) {
+		uid_t tmpuid = (uid_t) -1;
-			LCHOWN (root, new_uid,
+		gid_t tmpgid = (gid_t) -1;
-			        sb.st_gid == old_gid ? new_gid : sb.st_gid);
+		if (((uid_t) -1 == old_uid) || (sb.st_uid == old_uid)) {
+			tmpuid = new_uid;
 		}
+		if (((gid_t) -1 == old_gid) || (sb.st_gid == old_gid)) {
+			tmpgid = new_gid;
+		}
+		if (((uid_t) -1 != tmpuid) || ((gid_t) -1 != tmpgid)) {
+			rc = LCHOWN (root, tmpuid, tmpgid);
+		}
+	} else {
+		rc = -1;
 	}
+
 	return rc;
 }
 

libmisc/chowntty.c

@@ -72,7 +72,7 @@ void chown_tty (const struct passwd *info)
 	 */
 
 	if (   (fchown (STDIN_FILENO, info->pw_uid, gid) != 0)
-	    || (fchmod (STDIN_FILENO, getdef_num ("TTYPERM", 0600)) != 0)) {
+	    || (fchmod (STDIN_FILENO, (mode_t)getdef_num ("TTYPERM", 0600)) != 0)) {
 		int err = errno;
 
 		fprintf (stderr,

libmisc/cleanup.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2008       , Nicolas François
+ * Copyright (c) 2008 - 2011, Nicolas François
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -38,8 +38,12 @@
  * The cleanup_functions stack.
  */
 #define CLEANUP_FUNCTIONS 10
+
+typedef /*@null@*/void * parg_t;
+
 static cleanup_function cleanup_functions[CLEANUP_FUNCTIONS];
-static void * cleanup_function_args[CLEANUP_FUNCTIONS];
+static parg_t cleanup_function_args[CLEANUP_FUNCTIONS];
+static pid_t cleanup_pid = 0;
 
 /*
  * - Cleanup functions shall not fail.
@@ -53,6 +57,9 @@ static void * cleanup_function_args[CLEANUP_FUNCTIONS];
 /*
  * do_cleanups - perform the actions stored in the cleanup_functions stack.
  *
+ * Cleanup action are not executed on exit of the processes started by the
+ * parent (first caller of add_cleanup).
+ *
  * It is intended to be used as:
  *     atexit (do_cleanups);
  */
@@ -63,6 +70,10 @@ void do_cleanups (void)
 	/* Make sure there were no overflow */
 	assert (NULL == cleanup_functions[CLEANUP_FUNCTIONS-1]);
 
+	if (getpid () != cleanup_pid) {
+		return;
+	}
+
 	i = CLEANUP_FUNCTIONS;
 	do {
 		i--;
@@ -75,13 +86,17 @@ void do_cleanups (void)
 /*
  * add_cleanup - Add a cleanup_function to the cleanup_functions stack.
  */
-void add_cleanup (cleanup_function pcf, /*@null@*/void *arg)
+void add_cleanup (/*@notnull@*/cleanup_function pcf, /*@null@*/void *arg)
 {
 	unsigned int i;
 	assert (NULL != pcf);
 
 	assert (NULL == cleanup_functions[CLEANUP_FUNCTIONS-2]);
 
+	if (0 == cleanup_pid) {
+		cleanup_pid = getpid ();
+	}
+
 	/* Add the cleanup_function at the end of the stack */
 	for (i=0; NULL != cleanup_functions[i]; i++);
 	cleanup_functions[i] = pcf;
@@ -91,7 +106,7 @@ void add_cleanup (cleanup_function pcf, /*@null@*/void *arg)
 /*
  * del_cleanup - Remove a cleanup_function from the cleanup_functions stack.
  */
-void del_cleanup (cleanup_function pcf)
+void del_cleanup (/*@notnull@*/cleanup_function pcf)
 {
 	unsigned int i;
 	assert (NULL != pcf);
@@ -109,7 +124,8 @@ void del_cleanup (cleanup_function pcf)
 	/* Move the rest of the cleanup functions */
 	for (; i<CLEANUP_FUNCTIONS; i++) {
 		/* Make sure the cleanup function was specified only once */
-		assert (cleanup_functions[i+1] != pcf);
+		assert (   (i == (CLEANUP_FUNCTIONS -1))
+		        || (cleanup_functions[i+1] != pcf));
 
 		if (i == (CLEANUP_FUNCTIONS -1)) {
 			cleanup_functions[i] = NULL;

libmisc/console.c

@@ -3,7 +3,7 @@
  * Copyright (c) 1991       , Chip Rosenthal
  * Copyright (c) 1996 - 1998, Marek Michałkiewicz
  * Copyright (c) 2003 - 2005, Tomasz Kłoczko
- * Copyright (c) 2007 - 2008, Nicolas François
+ * Copyright (c) 2007 - 2010, Nicolas François
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -50,7 +50,8 @@ static bool is_listed (const char *cfgin, const char *tty, bool def);
 static bool is_listed (const char *cfgin, const char *tty, bool def)
 {
 	FILE *fp;
-	char buf[200], *cons, *s;
+	char buf[200], *s;
+	const char *cons;
 
 	/*
 	 * If the CONSOLE configuration definition isn't given,
@@ -68,13 +69,15 @@ static bool is_listed (const char *cfgin, const char *tty, bool def)
 	 */
 
 	if (*cons != '/') {
+		char *pbuf;
 		strcpy (buf, cons);
-		while ((s = strtok (buf, ":")) != NULL) {
+		pbuf = &buf[0];
+		while ((s = strtok (pbuf, ":")) != NULL) {
 			if (strcmp (s, tty) == 0) {
 				return true;
 			}
 
-			cons = NULL;
+			pbuf = NULL;
 		}
 		return false;
 	}

libmisc/copydir.c

@@ -2,7 +2,7 @@
  * Copyright (c) 1991 - 1994, Julianne Frances Haugh
  * Copyright (c) 1996 - 2001, Marek Michałkiewicz
  * Copyright (c) 2003 - 2006, Tomasz Kłoczko
- * Copyright (c) 2007 - 2008, Nicolas François
+ * Copyright (c) 2007 - 2010, Nicolas François
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -44,7 +44,19 @@
 #include "defines.h"
 #ifdef WITH_SELINUX
 #include <selinux/selinux.h>
-#endif
+#endif				/* WITH_SELINUX */
+#if defined(WITH_ACL) || defined(WITH_ATTR)
+#include <stdarg.h>
+#include <attr/error_context.h>
+#endif				/* WITH_ACL || WITH_ATTR */
+#ifdef WITH_ACL
+#include <acl/libacl.h>
+#endif				/* WITH_ACL */
+#ifdef WITH_ATTR
+#include <attr/libattr.h>
+#endif				/* WITH_ATTR */
+
+
 static /*@null@*/const char *src_orig;
 static /*@null@*/const char *dst_orig;
 
@@ -58,66 +70,73 @@ struct link_name {
 static /*@exposed@*/struct link_name *links;
 
 static int copy_entry (const char *src, const char *dst,
-                       long int uid, long int gid);
+                       bool reset_selinux,
+                       uid_t old_uid, uid_t new_uid,
+                       gid_t old_gid, gid_t new_gid);
 static int copy_dir (const char *src, const char *dst,
+                     bool reset_selinux,
                      const struct stat *statp, const struct timeval mt[],
-                     long int uid, long int gid);
+                     uid_t old_uid, uid_t new_uid,
+                     gid_t old_gid, gid_t new_gid);
 #ifdef	S_IFLNK
-static char *readlink_malloc (const char *filename);
+static /*@null@*/char *readlink_malloc (const char *filename);
 static int copy_symlink (const char *src, const char *dst,
+                         unused bool reset_selinux,
                          const struct stat *statp, const struct timeval mt[],
-                         long int uid, long int gid);
+                         uid_t old_uid, uid_t new_uid,
-#endif
+                         gid_t old_gid, gid_t new_gid);
-static int copy_hardlink (const char *src, const char *dst,
+#endif				/* S_IFLNK */
+static int copy_hardlink (const char *dst,
+                          unused bool reset_selinux,
                           struct link_name *lp);
-static int copy_special (const char *dst,
+static int copy_special (const char *src, const char *dst,
+                         bool reset_selinux,
                          const struct stat *statp, const struct timeval mt[],
-                         long int uid, long int gid);
+                         uid_t old_uid, uid_t new_uid,
+                         gid_t old_gid, gid_t new_gid);
 static int copy_file (const char *src, const char *dst,
+                      bool reset_selinux,
                       const struct stat *statp, const struct timeval mt[],
-                      long int uid, long int gid);
+                      uid_t old_uid, uid_t new_uid,
+                      gid_t old_gid, gid_t new_gid);
+static int chown_if_needed (const char *dst, const struct stat *statp,
+                            uid_t old_uid, uid_t new_uid,
+                            gid_t old_gid, gid_t new_gid);
+static int lchown_if_needed (const char *dst, const struct stat *statp,
+                             uid_t old_uid, uid_t new_uid,
+                             gid_t old_gid, gid_t new_gid);
+static int fchown_if_needed (int fdst, const struct stat *statp,
+                             uid_t old_uid, uid_t new_uid,
+                             gid_t old_gid, gid_t new_gid);
 
-#ifdef WITH_SELINUX
+#if defined(WITH_ACL) || defined(WITH_ATTR)
 /*
- * selinux_file_context - Set the security context before any file or
+ * error_acl - format the error messages for the ACL and EQ libraries.
- *                        directory creation.
- *
- *	selinux_file_context () should be called before any creation of file,
- *	symlink, directory, ...
- *
- *	Callers may have to Reset SELinux to create files with default
- *	contexts:
- *		setfscreatecon (NULL);
  */
-int selinux_file_context (const char *dst_name)
+static void error_acl (struct error_context *ctx, const char *fmt, ...)
 {
-	static bool selinux_checked = false;
+	va_list ap;
-	static bool selinux_enabled;
-	security_context_t scontext = NULL;
 
-	if (!selinux_checked) {
+	/* ignore the case when destination does not support ACLs 
-		selinux_enabled = is_selinux_enabled () > 0;
+	 * or extended attributes */
-		selinux_checked = true;
+	if (ENOTSUP == errno) {
+		errno = 0;
+		return;
 	}
 
-	if (selinux_enabled) {
+	va_start (ap, fmt);
-		/* Get the default security context for this file */
+	(void) fprintf (stderr, _("%s: "), Prog);
-		if (matchpathcon (dst_name, 0, &scontext) < 0) {
+	if (vfprintf (stderr, fmt, ap) != 0) {
-			if (security_getenforce () != 0) {
+		(void) fputs (_(": "), stderr);
-				return 1;
-			}
-		}
-		/* Set the security context for the next created file */
-		if (setfscreatecon (scontext) < 0) {
-			if (security_getenforce () != 0) {
-				return 1;
-			}
-		}
-		freecon (scontext);
 	}
-	return 0;
+	(void) fprintf (stderr, "%s\n", strerror (errno));
+	va_end (ap);
 }
-#endif
+
+static struct error_context ctx = {
+	error_acl
+};
+#endif				/* WITH_ACL || WITH_ATTR */
 
 /*
  * remove_link - delete a link from the linked list
@@ -184,7 +203,7 @@ static /*@exposed@*/ /*@null@*/struct link_name *check_link (const char *name, c
 	lp->ln_count = sb->st_nlink;
 	len = name_len - src_len + dst_len + 1;
 	lp->ln_name = (char *) xmalloc (len);
-	snprintf (lp->ln_name, len, "%s%s", dst_orig, name + src_len);
+	(void) snprintf (lp->ln_name, len, "%s%s", dst_orig, name + src_len);
 	lp->ln_next = links;
 	links = lp;
 
@@ -196,15 +215,49 @@ static /*@exposed@*/ /*@null@*/struct link_name *check_link (const char *name, c
  *
  *	copy_tree() walks a directory tree and copies ordinary files
  *	as it goes.
+ *
+ *	When reset_selinux is enabled, extended attributes (and thus
+ *	SELinux attributes) are not copied.
+ *
+ *	old_uid and new_uid are used to set the ownership of the copied
+ *	files. Unless old_uid is set to -1, only the files owned by
+ *	old_uid have their ownership changed to new_uid. In addition, if
+ *	new_uid is set to -1, no ownership will be changed.
+ *
+ *	The same logic applies for the group-ownership and
+ *	old_gid/new_gid.
  */
 int copy_tree (const char *src_root, const char *dst_root,
-               long int uid, long int gid)
+               bool copy_root, bool reset_selinux,
+               uid_t old_uid, uid_t new_uid,
+               gid_t old_gid, gid_t new_gid)
 {
 	int err = 0;
 	bool set_orig = false;
 	struct DIRECT *ent;
 	DIR *dir;
 
+	if (copy_root) {
+		struct stat sb;
+		if (access (dst_root, F_OK) == 0) {
+			return -1;
+		}
+
+		if (LSTAT (src_root, &sb) == -1) {
+			return -1;
+		}
+
+		if (!S_ISDIR (sb.st_mode)) {
+			fprintf (stderr,
+			         "%s: %s is not a directory",
+			         Prog, src_root);
+			return -1;
+		}
+
+		return copy_entry (src_root, dst_root, reset_selinux,
+		                   old_uid, new_uid, old_gid, new_gid);
+	}
+
 	/*
 	 * Make certain both directories exist.  This routine is called
 	 * after the home directory is created, or recursively after the
@@ -256,12 +309,15 @@ int copy_tree (const char *src_root, const char *dst_root,
 				 * Build the filename for both the source and
 				 * the destination files.
 				 */
-				snprintf (src_name, src_len, "%s/%s",
+				(void) snprintf (src_name, src_len, "%s/%s",
-				          src_root, ent->d_name);
+				                 src_root, ent->d_name);
-				snprintf (dst_name, dst_len, "%s/%s",
+				(void) snprintf (dst_name, dst_len, "%s/%s",
-				          dst_root, ent->d_name);
+				                 dst_root, ent->d_name);
 
-				err = copy_entry (src_name, dst_name, uid, gid);
+				err = copy_entry (src_name, dst_name,
+				                  reset_selinux,
+				                  old_uid, new_uid,
+				                  old_gid, new_gid);
 			}
 			if (NULL != src_name) {
 				free (src_name);
@@ -276,16 +332,25 @@ int copy_tree (const char *src_root, const char *dst_root,
 	if (set_orig) {
 		src_orig = NULL;
 		dst_orig = NULL;
+		/* FIXME: clean links
+		 * Since there can be hardlinks elsewhere on the device,
+		 * we cannot check that all the hardlinks were found:
+		assert (NULL == links);
+		 */
 	}
 
 #ifdef WITH_SELINUX
-	/* Reset SELinux to create files with default contexts */
+	/* Reset SELinux to create files with default contexts.
-	setfscreatecon (NULL);
+	 * Note that the context is only reset on exit of copy_tree (it is
-#endif
+	 * assumed that the program would quit without needing a restored
-
+	 * context if copy_tree failed previously), and that copy_tree can
-	/* FIXME: with the call to remove_link, we could also check that
+	 * be called recursively (hence the context is set on the
-	 *        no links remain in links.
+	 * sub-functions of copy_entry).
-	 * assert (NULL == links); */
+	 */
+	if (reset_selinux_file_context () != 0) {
+		err = -1;
+	}
+#endif				/* WITH_SELINUX */
 
 	return err;
 }
@@ -300,13 +365,19 @@ int copy_tree (const char *src_root, const char *dst_root,
  *
  *	The access and modification time will not be modified.
  *
- *	The permissions will be set to uid/gid.
+ *	The permissions will be set to new_uid/new_gid.
  *
- *	If uid (resp. gid) is equal to -1, the user (resp. group) will
+ *	If new_uid (resp. new_gid) is equal to -1, the user (resp. group) will
  *	not be modified.
+ *
+ *	Only the files owned (resp. group-owned) by old_uid (resp.
+ *	old_gid) will be modified, unless old_uid (resp. old_gid) is set
+ *	to -1.
  */
 static int copy_entry (const char *src, const char *dst,
-                       long int uid, long int gid)
+                       bool reset_selinux,
+                       uid_t old_uid, uid_t new_uid,
+                       gid_t old_gid, gid_t new_gid)
 {
 	int err = 0;
 	struct stat sb;
@@ -319,29 +390,30 @@ static int copy_entry (const char *src, const char *dst,
 #ifdef HAVE_STRUCT_STAT_ST_ATIM
 		mt[0].tv_sec  = sb.st_atim.tv_sec;
 		mt[0].tv_usec = sb.st_atim.tv_nsec / 1000;
-#else
+#else				/* !HAVE_STRUCT_STAT_ST_ATIM */
 		mt[0].tv_sec  = sb.st_atime;
-#ifdef HAVE_STRUCT_STAT_ST_ATIMENSEC
+# ifdef HAVE_STRUCT_STAT_ST_ATIMENSEC
 		mt[0].tv_usec = sb.st_atimensec / 1000;
-#else
+# else				/* !HAVE_STRUCT_STAT_ST_ATIMENSEC */
 		mt[0].tv_usec = 0;
-#endif
+# endif				/* !HAVE_STRUCT_STAT_ST_ATIMENSEC */
-#endif
+#endif				/* !HAVE_STRUCT_STAT_ST_ATIM */
 
 #ifdef HAVE_STRUCT_STAT_ST_MTIM
 		mt[1].tv_sec  = sb.st_mtim.tv_sec;
 		mt[1].tv_usec = sb.st_mtim.tv_nsec / 1000;
-#else
+#else				/* !HAVE_STRUCT_STAT_ST_MTIM */
 		mt[1].tv_sec  = sb.st_mtime;
-#ifdef HAVE_STRUCT_STAT_ST_MTIMENSEC
+# ifdef HAVE_STRUCT_STAT_ST_MTIMENSEC
 		mt[1].tv_usec = sb.st_mtimensec / 1000;
-#else
+# else				/* !HAVE_STRUCT_STAT_ST_MTIMENSEC */
 		mt[1].tv_usec = 0;
-#endif
+# endif				/* !HAVE_STRUCT_STAT_ST_MTIMENSEC */
-#endif
+#endif				/* !HAVE_STRUCT_STAT_ST_MTIM */
 
 		if (S_ISDIR (sb.st_mode)) {
-			err = copy_dir (src, dst, &sb, mt, uid, gid);
+			err = copy_dir (src, dst, reset_selinux, &sb, mt,
+			                old_uid, new_uid, old_gid, new_gid);
 		}
 
 #ifdef	S_IFLNK
@@ -350,16 +422,17 @@ static int copy_entry (const char *src, const char *dst,
 		 */
 
 		else if (S_ISLNK (sb.st_mode)) {
-			err = copy_symlink (src, dst, &sb, mt, uid, gid);
+			err = copy_symlink (src, dst, reset_selinux, &sb, mt,
+			                    old_uid, new_uid, old_gid, new_gid);
 		}
-#endif
+#endif				/* S_IFLNK */
 
 		/*
 		 * See if this is a previously copied link
 		 */
 
 		else if ((lp = check_link (src, &sb)) != NULL) {
-			err = copy_hardlink (src, dst, lp);
+			err = copy_hardlink (dst, reset_selinux, lp);
 		}
 
 		/*
@@ -369,7 +442,8 @@ static int copy_entry (const char *src, const char *dst,
 		 */
 
 		else if (!S_ISREG (sb.st_mode)) {
-			err = copy_special (dst, &sb, mt, uid, gid);
+			err = copy_special (src, dst, reset_selinux, &sb, mt,
+			                    old_uid, new_uid, old_gid, new_gid);
 		}
 
 		/*
@@ -378,7 +452,8 @@ static int copy_entry (const char *src, const char *dst,
 		 */
 
 		else {
-			err = copy_file (src, dst, &sb, mt, uid, gid);
+			err = copy_file (src, dst, reset_selinux, &sb, mt,
+			                 old_uid, new_uid, old_gid, new_gid);
 		}
 	}
 
@@ -390,14 +465,16 @@ static int copy_entry (const char *src, const char *dst,
  *
  *	Copy a directory (recursively) from src to dst.
  *
- *	statp, mt, uid, gid are used to set the access and modification and the
+ *	statp, mt, old_uid, new_uid, old_gid, and new_gid are used to set
- *	access rights.
+ *	the access and modification and the access rights.
  *
  *	Return 0 on success, -1 on error.
  */
 static int copy_dir (const char *src, const char *dst,
+                     bool reset_selinux,
                      const struct stat *statp, const struct timeval mt[],
-                     long int uid, long int gid)
+                     uid_t old_uid, uid_t new_uid,
+                     gid_t old_gid, gid_t new_gid)
 {
 	int err = 0;
 
@@ -407,14 +484,33 @@ static int copy_dir (const char *src, const char *dst,
 	 */
 
 #ifdef WITH_SELINUX
-	selinux_file_context (dst);
+	if (set_selinux_file_context (dst) != 0) {
-#endif
+		return -1;
+	}
+#endif				/* WITH_SELINUX */
 	if (   (mkdir (dst, statp->st_mode) != 0)
-	    || (chown (dst,
+	    || (chown_if_needed (dst, statp,
-	               (uid == - 1) ? statp->st_uid : (uid_t) uid,
+	                         old_uid, new_uid, old_gid, new_gid) != 0)
-	               (gid == - 1) ? statp->st_gid : (gid_t) gid) != 0)
+#ifdef WITH_ACL
+	    || (   (perm_copy_file (src, dst, &ctx) != 0)
+	        && (errno != 0))
+#else				/* !WITH_ACL */
 	    || (chmod (dst, statp->st_mode) != 0)
-	    || (copy_tree (src, dst, uid, gid) != 0)
+#endif				/* !WITH_ACL */
+#ifdef WITH_ATTR
+	/*
+	 * If the third parameter is NULL, all extended attributes
+	 * except those that define Access Control Lists are copied.
+	 * ACLs are excluded by default because copying them between
+	 * file systems with and without ACL support needs some
+	 * additional logic so that no unexpected permissions result.
+	 */
+	    || (   !reset_selinux
+	        && (attr_copy_file (src, dst, NULL, &ctx) != 0)
+	        && (errno != 0))
+#endif				/* WITH_ATTR */
+	    || (copy_tree (src, dst, false, reset_selinux,
+	                   old_uid, new_uid, old_gid, new_gid) != 0)
 	    || (utimes (dst, mt) != 0)) {
 		err = -1;
 	}
@@ -429,11 +525,11 @@ static int copy_dir (const char *src, const char *dst,
  * return NULL on error.
  * The return string shall be freed by the caller.
  */
-static char *readlink_malloc (const char *filename)
+static /*@null@*/char *readlink_malloc (const char *filename)
 {
 	size_t size = 1024;
 
-	while (1) {
+	while (true) {
 		ssize_t nchars;
 		char *buffer = (char *) malloc (size);
 		if (NULL == buffer) {
@@ -443,10 +539,11 @@ static char *readlink_malloc (const char *filename)
 		nchars = readlink (filename, buffer, size);
 
 		if (nchars < 0) {
+			free(buffer);
 			return NULL;
 		}
 
-		if ( (size_t) nchars < size) { /* The buffer was large enough */
+		if ((size_t) nchars < size) { /* The buffer was large enough */
 			/* readlink does not nul-terminate */
 			buffer[nchars] = '\0';
 			return buffer;
@@ -463,14 +560,16 @@ static char *readlink_malloc (const char *filename)
  *
  *	Copy a symlink from src to dst.
  *
- *	statp, mt, uid, gid are used to set the access and modification and the
+ *	statp, mt, old_uid, new_uid, old_gid, and new_gid are used to set
- *	access rights.
+ *	the access and modification and the access rights.
  *
  *	Return 0 on success, -1 on error.
  */
 static int copy_symlink (const char *src, const char *dst,
+                         unused bool reset_selinux,
                          const struct stat *statp, const struct timeval mt[],
-                         long int uid, long int gid)
+                         uid_t old_uid, uid_t new_uid,
+                         gid_t old_gid, gid_t new_gid)
 {
 	char *oldlink;
 
@@ -494,25 +593,33 @@ static int copy_symlink (const char *src, const char *dst,
 	/* If src was a link to an entry of the src_orig directory itself,
 	 * create a link to the corresponding entry in the dst_orig
 	 * directory.
-	 * FIXME: This may change a relative link to an absolute link
 	 */
 	if (strncmp (oldlink, src_orig, strlen (src_orig)) == 0) {
 		size_t len = strlen (dst_orig) + strlen (oldlink) - strlen (src_orig) + 1;
-		char *dummy = (char *) malloc (len);
+		char *dummy = (char *) xmalloc (len);
-		snprintf (dummy, len, "%s%s",
+		(void) snprintf (dummy, len, "%s%s",
-		          dst_orig,
+		                 dst_orig,
-		          oldlink + strlen (src_orig));
+		                 oldlink + strlen (src_orig));
 		free (oldlink);
 		oldlink = dummy;
 	}
 
 #ifdef WITH_SELINUX
-	selinux_file_context (dst);
+	if (set_selinux_file_context (dst) != 0) {
-#endif
+		free (oldlink);
+		return -1;
+	}
+#endif				/* WITH_SELINUX */
 	if (   (symlink (oldlink, dst) != 0)
-	    || (lchown (dst,
+	    || (lchown_if_needed (dst, statp,
-	                (uid == -1) ? statp->st_uid : (uid_t) uid,
+	                          old_uid, new_uid, old_gid, new_gid) != 0)) {
-	                (gid == -1) ? statp->st_gid : (gid_t) gid) != 0)) {
+		/* FIXME: there are no modes on symlinks, right?
+		 *        ACL could be copied, but this would be much more
+		 *        complex than calling perm_copy_file.
+		 *        Ditto for Extended Attributes.
+		 *        We currently only document that ACL and Extended
+		 *        Attributes are not copied.
+		 */
 		free (oldlink);
 		return -1;
 	}
@@ -524,12 +631,12 @@ static int copy_symlink (const char *src, const char *dst,
 	 *  it returns ENOSYS on many system
 	 *  - not implemented
 	 */
-	lutimes (dst, mt);
+	(void) lutimes (dst, mt);
-#endif
+#endif				/* HAVE_LUTIMES */
 
 	return 0;
 }
-#endif
+#endif				/* S_IFLNK */
 
 /*
  * copy_hardlink - copy a hardlink
@@ -538,23 +645,18 @@ static int copy_symlink (const char *src, const char *dst,
  *
  *	Return 0 on success, -1 on error.
  */
-static int copy_hardlink (const char *src, const char *dst,
+static int copy_hardlink (const char *dst,
+                          unused bool reset_selinux,
                           struct link_name *lp)
 {
-	/* TODO: selinux needed? */
+	/* FIXME: selinux, ACL, Extended Attributes needed? */
 
 	if (link (lp->ln_name, dst) != 0) {
 		return -1;
 	}
 
-	/* FIXME: why is it unlinked? This is a copy, not a move */
-	if (unlink (src) != 0) {
-		return -1;
-	}
-
-	/* FIXME: idem, although it may never be used again */
 	/* If the file could be unlinked, decrement the links counter,
-	 * and delete the file if it was the last reference */
+	 * and forget about this link if it was the last reference */
 	lp->ln_count--;
 	if (lp->ln_count <= 0) {
 		remove_link (lp);
@@ -568,26 +670,46 @@ static int copy_hardlink (const char *src, const char *dst,
  *
  *	Copy a special file from src to dst.
  *
- *	statp, mt, uid, gid are used to set the access and modification and the
+ *	statp, mt, old_uid, new_uid, old_gid, and new_gid are used to set
- *	access rights.
+ *	the access and modification and the access rights.
  *
  *	Return 0 on success, -1 on error.
  */
-static int copy_special (const char *dst,
+static int copy_special (const char *src, const char *dst,
+                         bool reset_selinux,
                          const struct stat *statp, const struct timeval mt[],
-                         long int uid, long int gid)
+                         uid_t old_uid, uid_t new_uid,
+                         gid_t old_gid, gid_t new_gid)
 {
 	int err = 0;
 
 #ifdef WITH_SELINUX
-	selinux_file_context (dst);
+	if (set_selinux_file_context (dst) != 0) {
-#endif
+		return -1;
+	}
+#endif				/* WITH_SELINUX */
 
 	if (   (mknod (dst, statp->st_mode & ~07777, statp->st_rdev) != 0)
-	    || (chown (dst,
+	    || (chown_if_needed (dst, statp,
-	               (uid == -1) ? statp->st_uid : (uid_t) uid,
+	                         old_uid, new_uid, old_gid, new_gid) != 0)
-	               (gid == -1) ? statp->st_gid : (gid_t) gid) != 0)
+#ifdef WITH_ACL
+	    || (   (perm_copy_file (src, dst, &ctx) != 0)
+	        && (errno != 0))
+#else				/* !WITH_ACL */
 	    || (chmod (dst, statp->st_mode & 07777) != 0)
+#endif				/* !WITH_ACL */
+#ifdef WITH_ATTR
+	/*
+	 * If the third parameter is NULL, all extended attributes
+	 * except those that define Access Control Lists are copied.
+	 * ACLs are excluded by default because copying them between
+	 * file systems with and without ACL support needs some
+	 * additional logic so that no unexpected permissions result.
+	 */
+	    || (   !reset_selinux
+	        && (attr_copy_file (src, dst, NULL, &ctx) != 0)
+	        && (errno != 0))
+#endif				/* WITH_ATTR */
 	    || (utimes (dst, mt) != 0)) {
 		err = -1;
 	}
@@ -600,14 +722,16 @@ static int copy_special (const char *dst,
  *
  *	Copy a file from src to dst.
  *
- *	statp, mt, uid, gid are used to set the access and modification and the
+ *	statp, mt, old_uid, new_uid, old_gid, and new_gid are used to set
- *	access rights.
+ *	the access and modification and the access rights.
  *
  *	Return 0 on success, -1 on error.
  */
 static int copy_file (const char *src, const char *dst,
+                      bool reset_selinux,
                       const struct stat *statp, const struct timeval mt[],
-                      long int uid, long int gid)
+                      uid_t old_uid, uid_t new_uid,
+                      gid_t old_gid, gid_t new_gid)
 {
 	int err = 0;
 	int ifd;
@@ -620,20 +744,40 @@ static int copy_file (const char *src, const char *dst,
 		return -1;
 	}
 #ifdef WITH_SELINUX
-	selinux_file_context (dst);
+	if (set_selinux_file_context (dst) != 0) {
-#endif
+		return -1;
+	}
+#endif				/* WITH_SELINUX */
 	ofd = open (dst, O_WRONLY | O_CREAT | O_TRUNC, statp->st_mode & 07777);
 	if (   (ofd < 0)
-	    || (fchown (ofd,
+	    || (fchown_if_needed (ofd, statp,
-	                (uid == -1) ? statp->st_uid : (uid_t) uid,
+	                          old_uid, new_uid, old_gid, new_gid) != 0)
-	                (gid == -1) ? statp->st_gid : (gid_t) gid) != 0)
+#ifdef WITH_ACL
-	    || (fchmod (ofd, statp->st_mode & 07777) != 0)) {
+	    || (   (perm_copy_fd (src, ifd, dst, ofd, &ctx) != 0)
+	        && (errno != 0))
+#else				/* !WITH_ACL */
+	    || (fchmod (ofd, statp->st_mode & 07777) != 0)
+#endif				/* !WITH_ACL */
+#ifdef WITH_ATTR
+	/*
+	 * If the third parameter is NULL, all extended attributes
+	 * except those that define Access Control Lists are copied.
+	 * ACLs are excluded by default because copying them between
+	 * file systems with and without ACL support needs some
+	 * additional logic so that no unexpected permissions result.
+	 */
+	    || (   !reset_selinux
+	        && (attr_copy_fd (src, ifd, dst, ofd, NULL, &ctx) != 0)
+	        && (errno != 0))
+#endif				/* WITH_ATTR */
+	   ) {
 		(void) close (ifd);
 		return -1;
 	}
 
 	while ((cnt = read (ifd, buf, sizeof buf)) > 0) {
 		if (write (ofd, buf, (size_t)cnt) != cnt) {
+			(void) close (ifd);
 			return -1;
 		}
 	}
@@ -644,7 +788,7 @@ static int copy_file (const char *src, const char *dst,
 	if (futimes (ofd, mt) != 0) {
 		return -1;
 	}
-#endif
+#endif				/* HAVE_FUTIMES */
 
 	if (close (ofd) != 0) {
 		return -1;
@@ -654,97 +798,42 @@ static int copy_file (const char *src, const char *dst,
 	if (utimes(dst, mt) != 0) {
 		return -1;
 	}
-#endif
+#endif				/* !HAVE_FUTIMES */
 
 	return err;
 }
 
-/*
+#define def_chown_if_needed(chown_function, type_dst)                  \
- * remove_tree - delete a directory tree
+static int chown_function ## _if_needed (type_dst dst,                 \
- *
+                                         const struct stat *statp,     \
- *	remove_tree() walks a directory tree and deletes all the files
+                                         uid_t old_uid, uid_t new_uid, \
- *	and directories.
+                                         gid_t old_gid, gid_t new_gid) \
- *	At the end, it deletes the root directory itself.
+{                                                                      \
- */
+	uid_t tmpuid = (uid_t) -1;                                     \
-
+	gid_t tmpgid = (gid_t) -1;                                     \
-int remove_tree (const char *root)
+                                                                       \
-{
+	/* Use new_uid if old_uid is set to -1 or if the file was      \
-	char *new_name = NULL;
+	 * owned by the user. */                                       \
-	int err = 0;
+	if (((uid_t) -1 == old_uid) || (statp->st_uid == old_uid)) {   \
-	struct DIRECT *ent;
+		tmpuid = new_uid;                                      \
-	struct stat sb;
+	}                                                              \
-	DIR *dir;
+	/* Otherwise, or if new_uid was set to -1, we keep the same    \
-
+	 * owner. */                                                   \
-	/*
+	if ((uid_t) -1 == tmpuid) {                                    \
-	 * Open the source directory and read each entry.  Every file
+		tmpuid = statp->st_uid;                                \
-	 * entry in the directory is copied with the UID and GID set
+	}                                                              \
-	 * to the provided values.  As an added security feature only
+                                                                       \
-	 * regular files (and directories ...) are copied, and no file
+	if (((gid_t) -1 == old_gid) || (statp->st_gid == old_gid)) {   \
-	 * is made set-ID.
+		tmpgid = new_gid;                                      \
-	 */
+	}                                                              \
-	dir = opendir (root);
+	if ((gid_t) -1 == tmpgid) {                                    \
-	if (NULL == dir) {
+		tmpgid = statp->st_gid;                                \
-		return -1;
+	}                                                              \
-	}
+                                                                       \
-
+	return chown_function (dst, tmpuid, tmpgid);                   \
-	while ((ent = readdir (dir))) {
-		size_t new_len = strlen (root) + strlen (ent->d_name) + 2;
-
-		/*
-		 * Skip the "." and ".." entries
-		 */
-
-		if (strcmp (ent->d_name, ".") == 0 ||
-		    strcmp (ent->d_name, "..") == 0) {
-			continue;
-		}
-
-		/*
-		 * Make the filename for the current entry.
-		 */
-
-		if (NULL != new_name) {
-			free (new_name);
-		}
-		new_name = (char *) malloc (new_len);
-		if (NULL == new_name) {
-			err = -1;
-			break;
-		}
-		snprintf (new_name, new_len, "%s/%s", root, ent->d_name);
-		if (LSTAT (new_name, &sb) == -1) {
-			continue;
-		}
-
-		if (S_ISDIR (sb.st_mode)) {
-			/*
-			 * Recursively delete this directory.
-			 */
-			if (remove_tree (new_name) != 0) {
-				err = -1;
-				break;
-			}
-		} else {
-			/*
-			 * Delete the file.
-			 */
-			if (unlink (new_name) != 0) {
-				err = -1;
-				break;
-			}
-		}
-	}
-	if (NULL != new_name) {
-		free (new_name);
-	}
-	(void) closedir (dir);
-
-	if (0 == err) {
-		if (rmdir (root) != 0) {
-			err = -1;
-		}
-	}
-
-	return err;
 }
 
+def_chown_if_needed (chown, const char *)
+def_chown_if_needed (lchown, const char *)
+def_chown_if_needed (fchown, int)
+

libmisc/env.c

@@ -115,6 +115,9 @@ void addenv (const char *string, /*@null@*/const char *value)
 
 	n = (size_t) (cp - newstring);
 
+	/*
+	 * If this environment variable is already set, change its value.
+	 */
 	for (i = 0; i < newenvc; i++) {
 		if (   (strncmp (newstring, newenvp[i], n) == 0)
 		    && (('=' == newenvp[i][n]) || ('\0' == newenvp[i][n]))) {
@@ -128,8 +131,15 @@ void addenv (const char *string, /*@null@*/const char *value)
 		return;
 	}
 
+	/*
+	 * Otherwise, save the new environment variable
+	 */
 	newenvp[newenvc++] = newstring;
 
+	/*
+	 * And extend the environment if needed.
+	 */
+
 	/*
 	 * Check whether newenvc is a multiple of NEWENVP_STEP.
 	 * If so we have to resize the vector.
@@ -143,14 +153,14 @@ void addenv (const char *string, /*@null@*/const char *value)
 		size_t newsize;
 
 		/*
-		 * If the resize operation succeds we can
+		 * If the resize operation succeeds we can
 		 * happily go on, else print a message.
 		 */
 
 		newsize = (newenvc + NEWENVP_STEP) * sizeof (char *);
 		__newenvp = (char **) realloc (newenvp, newsize);
 
-		if (__newenvp) {
+		if (NULL != __newenvp) {
 			/*
 			 * If this is our current environment, update
 			 * environ so that it doesn't point to some
@@ -251,7 +261,7 @@ void sanitize_env (void)
 			if (strncmp (*cur, *bad, strlen (*bad)) != 0) {
 				continue;
 			}
-			if (strchr (*cur, '/') != NULL) {
+			if (strchr (*cur, '/') == NULL) {
 				continue;	/* OK */
 			}
 			for (move = cur; NULL != *move; move++) {

libmisc/failure.c

@@ -2,7 +2,7 @@
  * Copyright (c) 1989 - 1994, Julianne Frances Haugh
  * Copyright (c) 1996 - 1998, Marek Michałkiewicz
  * Copyright (c) 2002 - 2005, Tomasz Kłoczko
- * Copyright (c) 2008       , Nicolas François
+ * Copyright (c) 2008 - 2010, Nicolas François
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -273,12 +273,14 @@ void failprint (const struct faillog *fail)
 		lasttime++;
 	}
 #endif
+	/*@-formatconst@*/
 	(void) printf (ngettext ("%d failure since last login.\n"
 	                         "Last was %s on %s.\n",
 	                         "%d failures since last login.\n"
 	                         "Last was %s on %s.\n",
 	                         (unsigned long) fail->fail_cnt),
 	               fail->fail_cnt, lasttime, fail->fail_line);
+	/*@=formatconst@*/
 }
 
 /*
@@ -296,7 +298,7 @@ void failtmp (const char *username,
 #endif				/* !USE_UTMPX */
     )
 {
-	char *ftmp;
+	const char *ftmp;
 	int fd;
 
 	/*

libmisc/find_new_gid.c

@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 1991 - 1994, Julianne Frances Haugh
- * Copyright (c) 2008 - 2009, Nicolas François
+ * Copyright (c) 2008 - 2011, Nicolas François
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -32,6 +32,7 @@
 
 #include <assert.h>
 #include <stdio.h>
+#include <errno.h>
 
 #include "prototypes.h"
 #include "groupio.h"
@@ -52,7 +53,7 @@ int find_new_gid (bool sys_group,
                   /*@null@*/gid_t const *preferred_gid)
 {
 	const struct group *grp;
-	gid_t gid_min, gid_max, group_id, id;
+	gid_t gid_min, gid_max, group_id;
 	bool *used_gids;
 
 	assert (gid != NULL);
@@ -60,12 +61,30 @@ int find_new_gid (bool sys_group,
 	if (!sys_group) {
 		gid_min = (gid_t) getdef_ulong ("GID_MIN", 1000UL);
 		gid_max = (gid_t) getdef_ulong ("GID_MAX", 60000UL);
+		if (gid_max < gid_min) {
+			(void) fprintf (stderr,
+			                _("%s: Invalid configuration: GID_MIN (%lu), GID_MAX (%lu)\n"),
+			                Prog, (unsigned long) gid_min, (unsigned long) gid_max);
+			return -1;
+		}
 	} else {
 		gid_min = (gid_t) getdef_ulong ("SYS_GID_MIN", 101UL);
 		gid_max = (gid_t) getdef_ulong ("GID_MIN", 1000UL) - 1;
 		gid_max = (gid_t) getdef_ulong ("SYS_GID_MAX", (unsigned long) gid_max);
+		if (gid_max < gid_min) {
+			(void) fprintf (stderr,
+			                _("%s: Invalid configuration: SYS_GID_MIN (%lu), GID_MIN (%lu), SYS_GID_MAX (%lu)\n"),
+			                Prog, (unsigned long) gid_min, getdef_ulong ("GID_MIN", 1000UL), (unsigned long) gid_max);
+			return -1;
+		}
+	}
+	used_gids = malloc (sizeof (bool) * (gid_max +1));
+	if (NULL == used_gids) {
+		fprintf (stderr,
+		         _("%s: failed to allocate memory: %s\n"),
+		         Prog, strerror (errno));
+		return -1;
 	}
-	used_gids = alloca (sizeof (bool) * (gid_max +1));
 	memset (used_gids, false, sizeof (bool) * (gid_max + 1));
 
 	if (   (NULL != preferred_gid)
@@ -77,6 +96,7 @@ int find_new_gid (bool sys_group,
 	     * changes */
 	    && (gr_locate_gid (*preferred_gid) == NULL)) {
 		*gid = *preferred_gid;
+		free (used_gids);
 		return 0;
 	}
 
@@ -90,6 +110,7 @@ int find_new_gid (bool sys_group,
 	 * some groups were created but the changes were not committed yet.
 	 */
 	if (sys_group) {
+		gid_t id;
 		/* setgrent / getgrent / endgrent can be very slow with
 		 * LDAP configurations (and many accounts).
 		 * Since there is a limited amount of IDs to be tested
@@ -104,7 +125,7 @@ int find_new_gid (bool sys_group,
 			}
 		}
 
-		gr_rewind ();
+		(void) gr_rewind ();
 		while ((grp = gr_next ()) != NULL) {
 			if ((grp->gr_gid <= group_id) && (grp->gr_gid >= gid_min)) {
 				group_id = grp->gr_gid - 1;
@@ -128,7 +149,7 @@ int find_new_gid (bool sys_group,
 		}
 		endgrent ();
 
-		gr_rewind ();
+		(void) gr_rewind ();
 		while ((grp = gr_next ()) != NULL) {
 			if ((grp->gr_gid >= group_id) && (grp->gr_gid <= gid_max)) {
 				group_id = grp->gr_gid + 1;
@@ -141,43 +162,47 @@ int find_new_gid (bool sys_group,
 	}
 
 	/*
-	 * If a group with GID equal to GID_MAX exists, the above algorithm
+	 * If a group (resp. system group) with GID equal to GID_MAX (resp.
-	 * will give us GID_MAX+1 even if not unique. Search for the first
+	 * GID_MIN) exists, the above algorithm will give us GID_MAX+1
-	 * free GID starting with GID_MIN.
+	 * (resp. GID_MIN-1) even if not unique. Search for the first free
+	 * GID starting with GID_MIN (resp. GID_MAX).
 	 */
 	if (sys_group) {
-		if (group_id == gid_min - 1) {
+		if (group_id < gid_min) {
 			for (group_id = gid_max; group_id >= gid_min; group_id--) {
 				if (false == used_gids[group_id]) {
 					break;
 				}
 			}
-			if ( group_id < gid_min ) {
+			if (group_id < gid_min) {
 				fprintf (stderr,
 				         _("%s: Can't get unique system GID (no more available GIDs)\n"),
 				         Prog);
 				SYSLOG ((LOG_WARN,
 				         "no more available GID on the system"));
+				free (used_gids);
 				return -1;
 			}
 		}
 	} else {
-		if (group_id == gid_max + 1) {
+		if (group_id > gid_max) {
-			for (group_id = gid_min; group_id < gid_max; group_id++) {
+			for (group_id = gid_min; group_id <= gid_max; group_id++) {
 				if (false == used_gids[group_id]) {
 					break;
 				}
 			}
-			if (group_id == gid_max) {
+			if (group_id > gid_max) {
 				fprintf (stderr,
 				         _("%s: Can't get unique GID (no more available GIDs)\n"),
 				         Prog);
 				SYSLOG ((LOG_WARN, "no more available GID on the system"));
+				free (used_gids);
 				return -1;
 			}
 		}
 	}
 
+	free (used_gids);
 	*gid = group_id;
 	return 0;
 }

libmisc/find_new_sub_gids.c

@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2012 Eric Biederman
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the copyright holders or contributors may not be used to
+ *    endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <config.h>
+
+#ifdef ENABLE_SUBIDS
+
+#include <assert.h>
+#include <stdio.h>
+#include <errno.h>
+
+#include "prototypes.h"
+#include "subordinateio.h"
+#include "getdef.h"
+
+/*
+ * find_new_sub_gids - Find a new unused range of GIDs.
+ *
+ * If successful, find_new_sub_gids provides a range of unused
+ * user IDs in the [SUB_GID_MIN:SUB_GID_MAX] range.
+ * 
+ * Return 0 on success, -1 if no unused GIDs are available.
+ */
+int find_new_sub_gids (const char *owner,
+		       gid_t *range_start, unsigned long *range_count)
+{
+	unsigned long min, max;
+	unsigned long count;
+	gid_t start;
+
+	assert (range_start != NULL);
+	assert (range_count != NULL);
+
+	min = getdef_ulong ("SUB_GID_MIN", 100000UL);
+	max = getdef_ulong ("SUB_GID_MAX", 600100000UL);
+	count = getdef_ulong ("SUB_GID_COUNT", 65536);
+
+	if (min > max || count >= max || (min + count - 1) > max) {
+		(void) fprintf (stderr,
+				_("%s: Invalid configuration: SUB_GID_MIN (%lu),"
+				  " SUB_GID_MAX (%lu), SUB_GID_COUNT (%lu)\n"),
+			Prog, min, max, count);
+		return -1;
+	}
+
+	start = sub_gid_find_free_range(min, max, count);
+	if (start == (gid_t)-1) {
+		fprintf (stderr,
+		         _("%s: Can't get unique subordinate GID range\n"),
+		         Prog);
+		SYSLOG ((LOG_WARN, "no more available subordinate GIDs on the system"));
+		return -1;
+	}
+	*range_start = start;
+	*range_count = count;
+	return 0;
+}
+#else				/* !ENABLE_SUBIDS */
+extern int errno;		/* warning: ANSI C forbids an empty source file */
+#endif				/* !ENABLE_SUBIDS */
+

libmisc/find_new_sub_uids.c

@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2012 Eric Biederman
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the copyright holders or contributors may not be used to
+ *    endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <config.h>
+
+#ifdef ENABLE_SUBIDS
+
+#include <assert.h>
+#include <stdio.h>
+#include <errno.h>
+
+#include "prototypes.h"
+#include "subordinateio.h"
+#include "getdef.h"
+
+/*
+ * find_new_sub_uids - Find a new unused range of UIDs.
+ *
+ * If successful, find_new_sub_uids provides a range of unused
+ * user IDs in the [SUB_UID_MIN:SUB_UID_MAX] range.
+ * 
+ * Return 0 on success, -1 if no unused UIDs are available.
+ */
+int find_new_sub_uids (const char *owner,
+		       uid_t *range_start, unsigned long *range_count)
+{
+	unsigned long min, max;
+	unsigned long count;
+	uid_t start;
+
+	assert (range_start != NULL);
+	assert (range_count != NULL);
+
+	min = getdef_ulong ("SUB_UID_MIN", 100000UL);
+	max = getdef_ulong ("SUB_UID_MAX", 600100000UL);
+	count = getdef_ulong ("SUB_UID_COUNT", 65536);
+
+	if (min > max || count >= max || (min + count - 1) > max) {
+		(void) fprintf (stderr,
+				_("%s: Invalid configuration: SUB_UID_MIN (%lu),"
+				  " SUB_UID_MAX (%lu), SUB_UID_COUNT (%lu)\n"),
+			Prog, min, max, count);
+		return -1;
+	}
+
+	start = sub_uid_find_free_range(min, max, count);
+	if (start == (uid_t)-1) {
+		fprintf (stderr,
+		         _("%s: Can't get unique subordinate UID range\n"),
+		         Prog);
+		SYSLOG ((LOG_WARN, "no more available subordinate UIDs on the system"));
+		return -1;
+	}
+	*range_start = start;
+	*range_count = count;
+	return 0;
+}
+#else				/* !ENABLE_SUBIDS */
+extern int errno;		/* warning: ANSI C forbids an empty source file */
+#endif				/* !ENABLE_SUBIDS */
+

libmisc/find_new_uid.c

@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 1991 - 1994, Julianne Frances Haugh
- * Copyright (c) 2008 - 2009, Nicolas François
+ * Copyright (c) 2008 - 2011, Nicolas François
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -32,6 +32,7 @@
 
 #include <assert.h>
 #include <stdio.h>
+#include <errno.h>
 
 #include "prototypes.h"
 #include "pwio.h"
@@ -52,7 +53,7 @@ int find_new_uid (bool sys_user,
                   /*@null@*/uid_t const *preferred_uid)
 {
 	const struct passwd *pwd;
-	uid_t uid_min, uid_max, user_id, id;
+	uid_t uid_min, uid_max, user_id;
 	bool *used_uids;
 
 	assert (uid != NULL);
@@ -60,12 +61,30 @@ int find_new_uid (bool sys_user,
 	if (!sys_user) {
 		uid_min = (uid_t) getdef_ulong ("UID_MIN", 1000UL);
 		uid_max = (uid_t) getdef_ulong ("UID_MAX", 60000UL);
+		if (uid_max < uid_min) {
+			(void) fprintf (stderr,
+			                _("%s: Invalid configuration: UID_MIN (%lu), UID_MAX (%lu)\n"),
+			                Prog, (unsigned long) uid_min, (unsigned long) uid_max);
+			return -1;
+		}
 	} else {
 		uid_min = (uid_t) getdef_ulong ("SYS_UID_MIN", 101UL);
 		uid_max = (uid_t) getdef_ulong ("UID_MIN", 1000UL) - 1;
 		uid_max = (uid_t) getdef_ulong ("SYS_UID_MAX", (unsigned long) uid_max);
+		if (uid_max < uid_min) {
+			(void) fprintf (stderr,
+			                _("%s: Invalid configuration: SYS_UID_MIN (%lu), UID_MIN (%lu), SYS_UID_MAX (%lu)\n"),
+			                Prog, (unsigned long) uid_min, getdef_ulong ("UID_MIN", 1000UL), (unsigned long) uid_max);
+			return -1;
+		}
+	}
+	used_uids = malloc (sizeof (bool) * (uid_max +1));
+	if (NULL == used_uids) {
+		fprintf (stderr,
+		         _("%s: failed to allocate memory: %s\n"),
+		         Prog, strerror (errno));
+		return -1;
 	}
-	used_uids = alloca (sizeof (bool) * (uid_max +1));
 	memset (used_uids, false, sizeof (bool) * (uid_max + 1));
 
 	if (   (NULL != preferred_uid)
@@ -77,6 +96,7 @@ int find_new_uid (bool sys_user,
 	     * changes */
 	    && (pw_locate_uid (*preferred_uid) == NULL)) {
 		*uid = *preferred_uid;
+		free (used_uids);
 		return 0;
 	}
 
@@ -90,6 +110,7 @@ int find_new_uid (bool sys_user,
 	 * some users were created but the changes were not committed yet.
 	 */
 	if (sys_user) {
+		uid_t id;
 		/* setpwent / getpwent / endpwent can be very slow with
 		 * LDAP configurations (and many accounts).
 		 * Since there is a limited amount of IDs to be tested
@@ -104,7 +125,7 @@ int find_new_uid (bool sys_user,
 			}
 		}
 
-		pw_rewind ();
+		(void) pw_rewind ();
 		while ((pwd = pw_next ()) != NULL) {
 			if ((pwd->pw_uid <= user_id) && (pwd->pw_uid >= uid_min)) {
 				user_id = pwd->pw_uid - 1;
@@ -128,7 +149,7 @@ int find_new_uid (bool sys_user,
 		}
 		endpwent ();
 
-		pw_rewind ();
+		(void) pw_rewind ();
 		while ((pwd = pw_next ()) != NULL) {
 			if ((pwd->pw_uid >= user_id) && (pwd->pw_uid <= uid_max)) {
 				user_id = pwd->pw_uid + 1;
@@ -141,12 +162,13 @@ int find_new_uid (bool sys_user,
 	}
 
 	/*
-	 * If a user with UID equal to UID_MAX exists, the above algorithm
+	 * If a user (resp. system user) with UID equal to UID_MAX (resp.
-	 * will give us UID_MAX+1 even if not unique. Search for the first
+	 * UID_MIN) exists, the above algorithm will give us UID_MAX+1
-	 * free UID starting with UID_MIN.
+	 * (resp. UID_MIN-1) even if not unique. Search for the first free
+	 * UID starting with UID_MIN (resp. UID_MAX).
 	 */
 	if (sys_user) {
-		if (user_id == uid_min - 1) {
+		if (user_id < uid_min) {
 			for (user_id = uid_max; user_id >= uid_min; user_id--) {
 				if (false == used_uids[user_id]) {
 					break;
@@ -158,26 +180,29 @@ int find_new_uid (bool sys_user,
 				         Prog);
 				SYSLOG ((LOG_WARN,
 				         "no more available UID on the system"));
+				free (used_uids);
 				return -1;
 			}
 		}
 	} else {
-		if (user_id == uid_max + 1) {
+		if (user_id > uid_max) {
-			for (user_id = uid_min; user_id < uid_max; user_id++) {
+			for (user_id = uid_min; user_id <= uid_max; user_id++) {
 				if (false == used_uids[user_id]) {
 					break;
 				}
 			}
-			if (user_id == uid_max) {
+			if (user_id > uid_max) {
 				fprintf (stderr,
 				         _("%s: Can't get unique UID (no more available UIDs)\n"),
 				         Prog);
 				SYSLOG ((LOG_WARN, "no more available UID on the system"));
+				free (used_uids);
 				return -1;
 			}
 		}
 	}
 
+	free (used_uids);
 	*uid = user_id;
 	return 0;
 }

libmisc/getdate.h

@@ -35,5 +35,5 @@
 #include <config.h>
 #include "defines.h"
 
-time_t get_date (const char *, const time_t *);
+time_t get_date (const char *p, /*@null@*/const time_t *now);
 #endif

libmisc/getgr_nam_gid.c

@@ -44,7 +44,7 @@
  * The string may be a valid GID or a valid groupname.
  * If the group does not exist on the system, NULL is returned.
  */
-extern /*@null@*/struct group *getgr_nam_gid (const char *grname)
+extern /*@only@*//*@null@*/struct group *getgr_nam_gid (/*@null@*/const char *grname)
 {
 	long long int gid;
 	char *endptr;

libmisc/hushed.c

@@ -3,7 +3,7 @@
  * Copyright (c) 1991 - 1993, Chip Rosenthal
  * Copyright (c) 1996 - 2000, Marek Michałkiewicz
  * Copyright (c) 2003 - 2005, Tomasz Kłoczko
- * Copyright (c) 2008 - 2009, Nicolas François
+ * Copyright (c) 2008 - 2010, Nicolas François
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -50,7 +50,7 @@
 bool hushed (const char *username)
 {
 	struct passwd *pw;
-	char *hushfile;
+	const char *hushfile;
 	char buf[BUFSIZ];
 	bool found;
 	FILE *fp;
@@ -76,7 +76,7 @@ bool hushed (const char *username)
 	 */
 
 	if (hushfile[0] != '/') {
-		snprintf (buf, sizeof (buf), "%s/%s", pw->pw_dir, hushfile);
+		(void) snprintf (buf, sizeof (buf), "%s/%s", pw->pw_dir, hushfile);
 		return (access (buf, F_OK) == 0);
 	}
 

libmisc/idmapping.c

@@ -0,0 +1,143 @@
+/*
+ * Copyright (c) 2013 Eric Biederman
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the copyright holders or contributors may not be used to
+ *    endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <config.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include "prototypes.h"
+#include "idmapping.h"
+
+struct map_range *get_map_ranges(int ranges, int argc, char **argv)
+{
+	struct map_range *mappings, *mapping;
+	int idx, argidx;
+
+	if (ranges < 0 || argc < 0) {
+		fprintf(stderr, "%s: error calculating number of arguments\n", Prog);
+		return NULL;
+	}
+
+	if (ranges != ((argc + 2) / 3)) {
+		fprintf(stderr, "%s: ranges: %u is wrong for argc: %d\n", Prog, ranges, argc);
+		return NULL;
+	}
+
+	if ((ranges * 3) > argc) {
+		fprintf(stderr, "ranges: %u argc: %d\n",
+			ranges, argc);
+		fprintf(stderr,
+			_( "%s: Not enough arguments to form %u mappings\n"),
+			Prog, ranges);
+		return NULL;
+	}
+
+	mappings = calloc(ranges, sizeof(*mappings));
+	if (!mappings) {
+		fprintf(stderr, _( "%s: Memory allocation failure\n"),
+			Prog);
+		exit(EXIT_FAILURE);
+	}
+
+	/* Gather up the ranges from the command line */
+	mapping = mappings;
+	for (idx = 0, argidx = 0; idx < ranges; idx++, argidx += 3, mapping++) {
+		if (!getulong(argv[argidx + 0], &mapping->upper)) {
+			free(mappings);
+			return NULL;
+		}
+		if (!getulong(argv[argidx + 1], &mapping->lower)) {
+			free(mappings);
+			return NULL;
+		}
+		if (!getulong(argv[argidx + 2], &mapping->count)) {
+			free(mappings);
+			return NULL;
+		}
+	}
+	return mappings;
+}
+
+/* Number of ascii digits needed to print any unsigned long in decimal.
+ * There are approximately 10 bits for every 3 decimal digits.
+ * So from bits to digits the formula is roundup((Number of bits)/10) * 3.
+ * For common sizes of integers this works out to:
+ *  2bytes -->  6 ascii estimate  -> 65536  (5 real)
+ *  4bytes --> 12 ascii estimated -> 4294967296 (10 real)
+ *  8bytes --> 21 ascii estimated -> 18446744073709551616 (20 real)
+ * 16bytes --> 39 ascii estimated -> 340282366920938463463374607431768211456 (39 real)
+ */
+#define ULONG_DIGITS ((((sizeof(unsigned long) * CHAR_BIT) + 9)/10)*3)
+
+
+void write_mapping(int proc_dir_fd, int ranges, struct map_range *mappings,
+	const char *map_file)
+{
+	int idx;
+	struct map_range *mapping;
+	size_t bufsize;
+	char *buf, *pos;
+	int fd;
+
+	bufsize = ranges * ((ULONG_DIGITS  + 1) * 3);
+	pos = buf = xmalloc(bufsize);
+
+	/* Build the mapping command */
+	mapping = mappings;
+	for (idx = 0; idx < ranges; idx++, mapping++) {
+		/* Append this range to the string that will be written */
+		int written = snprintf(pos, bufsize - (pos - buf),
+			"%lu %lu %lu\n",
+			mapping->upper,
+			mapping->lower,
+			mapping->count);
+		if ((written <= 0) || (written >= (bufsize - (pos - buf)))) {
+			fprintf(stderr, _("%s: snprintf failed!\n"), Prog);
+			exit(EXIT_FAILURE);
+		}
+		pos += written;
+	}
+
+	/* Write the mapping to the maping file */
+	fd = openat(proc_dir_fd, map_file, O_WRONLY);
+	if (fd < 0) {
+		fprintf(stderr, _("%s: open of %s failed: %s\n"),
+			Prog, map_file, strerror(errno));
+		exit(EXIT_FAILURE);
+	}
+	if (write(fd, buf, pos - buf) != (pos - buf)) {
+		fprintf(stderr, _("%s: write to %s failed: %s\n"),
+			Prog, map_file, strerror(errno));
+		exit(EXIT_FAILURE);
+	}
+	close(fd);
+}

libmisc/idmapping.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2009       , Dan Walsh <dwalsh@redhat.com>
+ * Copyright (c) 2013 Eric Biederman
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -26,47 +26,19 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
-#include <config.h>
 
-#ident "$Id$"
+#ifndef _IDMAPPING_H_
+#define _IDMAPPING_H_
 
-#include <stdio.h>
+struct map_range {
-#include <sys/wait.h>
+	unsigned long upper; /* first ID inside the namespace */
-#include <fcntl.h>
+	unsigned long lower; /* first ID outside the namespace */
-#include "prototypes.h"
+	unsigned long count; /* Length of the inside and outside ranges */
-#include "defines.h"
+};
 
-int safe_system (const char *command,
+extern struct map_range *get_map_ranges(int ranges, int argc, char **argv);
-                 const char *argv[],
+extern void write_mapping(int proc_dir_fd, int ranges,
-                 const char *env[],
+	struct map_range *mappings, const char *map_file);
-                 int ignore_stderr)
-{
-	int status = -1;
-	int fd;
-	pid_t pid;
 
-	pid = fork();
+#endif /* _ID_MAPPING_H_ */
-	if (pid < 0) {
-		return -1;
-	}
-
-	if (pid) {       /* Parent */
-		if (waitpid (pid, &status, 0) > 0) {
-			return status;
-		} else {
-			return -1;
-		}
-	}
-
-	fd = open ("/dev/null", O_RDWR);
-	/* Child */
-	dup2 (fd, 0);	// Close Stdin
-	if (ignore_stderr) {
-		dup2 (fd, 2);	// Close Stderr
-	}
-
-	execve (command, (char *const *) argv, (char *const *) env);
-	fprintf (stderr, _("Failed to exec '%s'\n"), argv[0]);
-	exit (EXIT_FAILURE);
-}
 

libmisc/isexpired.c

@@ -107,7 +107,7 @@ int isexpired (const struct passwd *pw, /*@null@*/const struct spwd *sp)
 
 	if (   (-1 == sp->sp_lstchg)
 	    || (-1 == sp->sp_max)
-	    || (sp->sp_max >= (10000L * DAY / SCALE))) {
+	    || (sp->sp_max >= ((10000L * DAY) / SCALE))) {
 		return 0;
 	}
 

libmisc/limits.c

@@ -2,7 +2,7 @@
  * Copyright (c) 1989 - 1994, Julianne Frances Haugh
  * Copyright (c) 1996 - 1999, Marek Michałkiewicz
  * Copyright (c) 2003 - 2006, Tomasz Kłoczko
- * Copyright (c) 2007 - 2008, Nicolas François
+ * Copyright (c) 2007 - 2010, Nicolas François
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -33,6 +33,7 @@
 /*
  * Separated from setup.c.  --marekm
  * Resource limits thanks to Cristian Gafton.
+ * Enhancements of resource limit code by Thomas Orgis <thomas@orgis.org>
  */
 
 #include <config.h>
@@ -44,6 +45,7 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <stdio.h>
+#include <ctype.h>
 #include "prototypes.h"
 #include "defines.h"
 #include <pwd.h>
@@ -64,22 +66,46 @@
  *	value - string value to be read
  *	multiplier - value*multiplier is the actual limit
  */
-static int
+static int setrlimit_value (unsigned int resource,
-setrlimit_value (unsigned int resource, const char *value,
+                            const char *value,
-		 unsigned int multiplier)
+                            unsigned int multiplier)
 {
 	struct rlimit rlim;
-	long limit;
+	rlim_t limit;
 
-	if (getlong (value, &limit) == 0) {
+	/* The "-" is special, not belonging to a strange negative limit.
-		return 0;
+	 * It is infinity, in a controlled way.
+	 */
+	if ('-' == value[0]) {
+		limit = RLIM_INFINITY;
 	}
-	limit *= multiplier;
+	else {
-	if (limit != (rlim_t) limit) {
+		/* We cannot use getlong here because it fails when there
-		return 0;
+		 * is more to the value than just this number!
+		 * Also, we are limited to base 10 here (hex numbers will not
+		 * work with the limit string parser as is anyway)
+		 */
+		char *endptr;
+		long longlimit = strtol (value, &endptr, 10);
+		if ((0 == longlimit) && (value == endptr)) {
+			/* No argument at all. No-op.
+			 * FIXME: We could instead throw an error, though.
+			 */
+			return 0;
+		}
+		longlimit *= multiplier;
+		limit = (rlim_t)longlimit;
+		if (longlimit != limit)
+		{
+			/* FIXME: Again, silent error handling...
+			 * Wouldn't screaming make more sense?
+			 */
+			return 0;
+		}
 	}
-	rlim.rlim_cur = (rlim_t) limit;
+
-	rlim.rlim_max = (rlim_t) limit;
+	rlim.rlim_cur = limit;
+	rlim.rlim_max = limit;
 	if (setrlimit (resource, &rlim) != 0) {
 		return LOGIN_ERROR_RLIMIT;
 	}
@@ -138,11 +164,12 @@ static int check_logins (const char *name, const char *maxlogins)
 	count = 0;
 #ifdef USE_UTMPX
 	setutxent ();
-	while ((ut = getutxent ())) {
+	while ((ut = getutxent ()))
 #else				/* !USE_UTMPX */
 	setutent ();
-	while ((ut = getutent ())) {
+	while ((ut = getutent ()))
 #endif				/* !USE_UTMPX */
+	{
 		if (USER_PROCESS != ut->ut_type) {
 			continue;
 		}
@@ -167,8 +194,9 @@ static int check_logins (const char *name, const char *maxlogins)
 	 * includes the user who is currently trying to log in.
 	 */
 	if (count > limit) {
-		SYSLOG ((LOG_WARN, "Too many logins (max %d) for %s\n",
+		SYSLOG ((LOG_WARN,
-			 limit, name));
+		         "Too many logins (max %lu) for %s\n",
+		         limit, name));
 		return LOGIN_ERROR_LOGIN;
 	}
 	return 0;
@@ -186,17 +214,20 @@ static int check_logins (const char *name, const char *maxlogins)
  * [Cc]: c = RLIMIT_CORE	max core file size (KB)
  * [Dd]: d = RLIMIT_DATA	max data size (KB)
  * [Ff]: f = RLIMIT_FSIZE	max file size (KB)
+ * [Ii]: i = RLIMIT_NICE    max nice value (0..39 translates to 20..-19)
+ * [Kk]: k = file creation masK (umask)
+ * [Ll]: l = max number of logins for this user
  * [Mm]: m = RLIMIT_MEMLOCK	max locked-in-memory address space (KB)
  * [Nn]: n = RLIMIT_NOFILE	max number of open files
+ * [Oo]: o = RLIMIT_RTPRIO  max real time priority (linux/sched.h 0..MAX_RT_PRIO)
+ * [Pp]: p = process priority -20..20 (negative = high, positive = low)
  * [Rr]: r = RLIMIT_RSS		max resident set size (KB)
  * [Ss]: s = RLIMIT_STACK	max stack size (KB)
  * [Tt]: t = RLIMIT_CPU		max CPU time (MIN)
  * [Uu]: u = RLIMIT_NPROC	max number of processes
- * [Kk]: k = file creation masK (umask)
+ *
- * [Ll]: l = max number of logins for this user
+ * NOTE: Remember to extend the "no-limits" string below when adding a new
- * [Pp]: p = process priority -20..20 (negative = high, positive = low)
+ * limit...
- * [Ii]: i = RLIMIT_NICE    max nice value (0..39 translates to 20..-19)
- * [Oo]: o = RLIMIT_RTPRIO  max real time priority (linux/sched.h 0..MAX_RT_PRIO)
  *
  * Return value:
  *		0 = okay, of course
@@ -213,6 +244,24 @@ static int do_user_limits (const char *buf, const char *name)
 	bool reported = false;
 
 	pp = buf;
+	/* Skip leading whitespace. */
+	while ((' ' == *pp) || ('\t' == *pp)) {
+		pp++;
+	}
+
+	/* The special limit string "-" results in no limit for all known
+	 * limits.
+	 * We achieve that by parsing a full limit string, parts of it
+	 * being ignored if a limit type is not known to the system.
+	 * Though, there will be complaining for unknown limit types.
+	 */
+	if (strcmp (pp, "-") == 0) {
+		/* Remember to extend this, too, when adding new limits!
+		 * Oh... but "unlimited" does not make sense for umask,
+		 * or does it? (K-)
+		 */
+		pp = "A- C- D- F- I- L- M- N- O- P- R- S- T- U-";
+	}
 
 	while ('\0' != *pp) {
 		switch (*pp++) {
@@ -223,11 +272,11 @@ static int do_user_limits (const char *buf, const char *name)
 			retval |= setrlimit_value (RLIMIT_AS, pp, 1024);
 			break;
 #endif
-#ifdef RLIMIT_CPU
+#ifdef RLIMIT_CORE
-		case 't':
+		case 'c':
-		case 'T':
+		case 'C':
-			/* RLIMIT_CPU - max CPU time (MIN) */
+			/* RLIMIT_CORE - max core file size (KB) */
-			retval |= setrlimit_value (RLIMIT_CPU, pp, 60);
+			retval |= setrlimit_value (RLIMIT_CORE, pp, 1024);
 			break;
 #endif
 #ifdef RLIMIT_DATA
@@ -244,20 +293,22 @@ static int do_user_limits (const char *buf, const char *name)
 			retval |= setrlimit_value (RLIMIT_FSIZE, pp, 1024);
 			break;
 #endif
-#ifdef RLIMIT_NPROC
+#ifdef RLIMIT_NICE
-		case 'u':
+		case 'i':
-		case 'U':
+		case 'I':
-			/* RLIMIT_NPROC - max number of processes */
+			/* RLIMIT_NICE - max scheduling priority (0..39) */
-			retval |= setrlimit_value (RLIMIT_NPROC, pp, 1);
+			retval |= setrlimit_value (RLIMIT_NICE, pp, 1);
 			break;
 #endif
-#ifdef RLIMIT_CORE
+		case 'k':
-		case 'c':
+		case 'K':
-		case 'C':
+			retval |= set_umask (pp);
-			/* RLIMIT_CORE - max core file size (KB) */
+			break;
-			retval |= setrlimit_value (RLIMIT_CORE, pp, 1024);
+		case 'l':
+		case 'L':
+			/* LIMIT the number of concurrent logins */
+			retval |= check_logins (name, pp);
 			break;
-#endif
 #ifdef RLIMIT_MEMLOCK
 		case 'm':
 		case 'M':
@@ -272,6 +323,17 @@ static int do_user_limits (const char *buf, const char *name)
 			retval |= setrlimit_value (RLIMIT_NOFILE, pp, 1);
 			break;
 #endif
+#ifdef RLIMIT_RTPRIO
+		case 'o':
+		case 'O':
+			/* RLIMIT_RTPRIO - max real time priority (0..MAX_RT_PRIO) */
+			retval |= setrlimit_value (RLIMIT_RTPRIO, pp, 1);
+			break;
+#endif
+		case 'p':
+		case 'P':
+			retval |= set_prio (pp);
+			break;
 #ifdef RLIMIT_RSS
 		case 'r':
 		case 'R':
@@ -286,35 +348,28 @@ static int do_user_limits (const char *buf, const char *name)
 			retval |= setrlimit_value (RLIMIT_STACK, pp, 1024);
 			break;
 #endif
-#ifdef RLIMIT_NICE
+#ifdef RLIMIT_CPU
-		case 'i':
+		case 't':
-		case 'I':
+		case 'T':
-			/* RLIMIT_NICE - max scheduling priority (0..39) */
+			/* RLIMIT_CPU - max CPU time (MIN) */
-			retval |= setrlimit_value (RLIMIT_NICE, pp, 1);
+			retval |= setrlimit_value (RLIMIT_CPU, pp, 60);
 			break;
 #endif
-#ifdef RLIMIT_RTPRIO
+#ifdef RLIMIT_NPROC
-		case 'o':
+		case 'u':
-		case 'O':
+		case 'U':
-			/* RLIMIT_RTPRIO - max real time priority (0..MAX_RT_PRIO) */
+			/* RLIMIT_NPROC - max number of processes */
-			retval |= setrlimit_value (RLIMIT_RTPRIO, pp, 1);
+			retval |= setrlimit_value (RLIMIT_NPROC, pp, 1);
 			break;
 #endif
-		case 'k':
-		case 'K':
-			retval |= set_umask (pp);
-			break;
-		case 'l':
-		case 'L':
-			/* LIMIT the number of concurrent logins */
-			retval |= check_logins (name, pp);
-			break;
-		case 'p':
-		case 'P':
-			retval |= set_prio (pp);
-			break;
 		default:
 			/* Only report invalid strings once */
+			/* Note: A string can be invalid just because a
+			 * specific (theoretically valid) setting is not
+			 * supported by this build.
+			 * It is just a warning in syslog anyway. The line
+			 * is still processed
+			 */
 			if (!reported) {
 				SYSLOG ((LOG_WARN,
 				         "Invalid limit string: '%s'",
@@ -323,13 +378,51 @@ static int do_user_limits (const char *buf, const char *name)
 				retval |= LOGIN_ERROR_RLIMIT;
 			}
 		}
+		/* After parsing one limit setting (or just complaining
+		 * about it), one still needs to skip its argument to
+		 * prevent a bogus warning on trying to parse that as
+		 * limit specification.
+		 * So, let's skip all digits, "-" and our limited set of
+		 * whitespace.
+		 */
+		while (   isdigit (*pp)
+		       || ('-'  == *pp)
+		       || (' '  == *pp)
+		       || ('\t' ==*pp)) {
+			pp++;
+		}
 	}
 	return retval;
 }
 
+/* Check if user uname is in the group gname.
+ * Can I be sure that gr_mem contains no UID as string?
+ * Returns true when user is in the group, false when not.
+ * Any error is treated as false.
+ */
+static bool user_in_group (const char *uname, const char *gname)
+{
+	struct group *groupdata;
+
+	if (uname == NULL || gname == NULL){ 
+		return false;
+	}
+
+	/* We are not claiming to be re-entrant!
+	 * In case of paranoia or a multithreaded login program,
+	 * one needs to add some mess for getgrnam_r. */
+	groupdata = getgrnam (gname);
+	if (NULL == groupdata) {
+		SYSLOG ((LOG_WARN, "Nonexisting group `%s' in limits file.",
+		         gname));
+		return false;
+	}
+
+	return is_on_list (groupdata->gr_mem, uname);
+}
+
 static int setup_user_limits (const char *uname)
 {
-	/* TODO: allow and use @group syntax --cristiang */
 	FILE *fil;
 	char buf[1024];
 	char name[1024];
@@ -351,8 +444,10 @@ static int setup_user_limits (const char *uname)
 	}
 	/* The limits file have the following format:
 	 * - '#' (comment) chars only as first chars on a line;
-	 * - username must start on first column
+	 * - username must start on first column (or *, or @group)
-	 * A better (smarter) checking should be done --cristiang */
+	 *
+	 * FIXME: A better (smarter) checking should be done
+	 */
 	while (fgets (buf, 1024, fil) != NULL) {
 		if (('#' == buf[0]) || ('\n' == buf[0])) {
 			continue;
@@ -364,15 +459,35 @@ static int setup_user_limits (const char *uname)
 		 * username    L2  D2048  R4096
 		 * where spaces={' ',\t}. Also, we reject invalid limits.
 		 * Imposing a limit should be done with care, so a wrong
-		 * entry means no care anyway :-). A '-' as a limits
+		 * entry means no care anyway :-).
-		 * strings means no limits --cristiang */
+		 *
-		if (sscanf (buf, "%s%[ACDFMNRSTULPIOacdfmnrstulpio0-9 \t-]",
+		 * A '-' as a limits strings means no limits
-			    name, tempbuf) == 2) {
+		 *
+		 * The username can also be:
+		 *  '*': the default limits (only the last is taken into
+		 *       account)
+		 *  @group: the limit applies to the members of the group
+		 *
+		 * To clarify: The first entry with matching user name rules,
+		 * everything after it is ignored. If there is no user entry,
+		 * the last encountered entry for a matching group rules.
+		 * If there is no matching group entry, the default limits rule.
+		 */
+		if (sscanf (buf, "%s%[ACDFIKLMNOPRSTUacdfiklmnoprstu0-9 \t-]",
+		            name, tempbuf) == 2) {
 			if (strcmp (name, uname) == 0) {
 				strcpy (limits, tempbuf);
 				break;
 			} else if (strcmp (name, "*") == 0) {
 				strcpy (deflimits, tempbuf);
+			} else if (name[0] == '@') {
+				/* If the user is in the group, the group
+				 * limits apply unless later a line for
+				 * the specific user is found.
+				 */
+				if (user_in_group (uname, name+1)) {
+					strcpy (limits, tempbuf);
+				}
 			}
 		}
 	}
@@ -392,7 +507,6 @@ static int setup_user_limits (const char *uname)
 static void setup_usergroups (const struct passwd *info)
 {
 	const struct group *grp;
-	mode_t tmpmask;
 
 /*
  *	if not root, and UID == GID, and username is the same as primary
@@ -404,6 +518,7 @@ static void setup_usergroups (const struct passwd *info)
 		grp = getgrgid (info->pw_gid);
 		if (   (NULL != grp)
 		    && (strcmp (info->pw_name, grp->gr_name) == 0)) {
+			mode_t tmpmask;
 			tmpmask = umask (0777);
 			tmpmask = (tmpmask & ~070) | ((tmpmask >> 3) & 070);
 			(void) umask (tmpmask);
@@ -432,8 +547,7 @@ void setup_limits (const struct passwd *info)
 	if (getdef_bool ("QUOTAS_ENAB")) {
 #ifdef LIMITS
 		if (info->pw_uid != 0) {
-			if (setup_user_limits (info->pw_name) &
+			if ((setup_user_limits (info->pw_name) & LOGIN_ERROR_LOGIN) != 0) {
-			    LOGIN_ERROR_LOGIN) {
 				(void) fputs (_("Too many logins.\n"), stderr);
 				(void) sleep (2); /* XXX: Should be FAIL_DELAY */
 				exit (EXIT_FAILURE);

libmisc/list.c

@@ -141,6 +141,12 @@
 	return tmp;
 }
 
+/*
+ * Duplicate a list.
+ * The input list is not modified, but in order to allow the use of this
+ * function with list of members, the list elements are not enforced to be
+ * constant strings here.
+ */
 /*@only@*/ /*@out@*/char **dup_list (char *const *list)
 {
 	int i;
@@ -163,6 +169,12 @@
 	return tmp;
 }
 
+/*
+ * Check if member is part of the input list
+ * The input list is not modified, but in order to allow the use of this
+ * function with list of members, the list elements are not enforced to be
+ * constant strings here.
+ */
 bool is_on_list (char *const *list, const char *member)
 {
 	assert (NULL != member);
@@ -187,7 +199,7 @@ bool is_on_list (char *const *list, const char *member)
 	char *members;
 	char **array;
 	int i;
-	const char *cp;
+	char *cp;
 	char *cp2;
 
 	assert (NULL != comma);

libmisc/loginprompt.c

@@ -2,7 +2,7 @@
  * Copyright (c) 1989 - 1993, Julianne Frances Haugh
  * Copyright (c) 1996 - 2000, Marek Michałkiewicz
  * Copyright (c) 2003 - 2005, Tomasz Kłoczko
- * Copyright (c) 2008 - 2009, Nicolas François
+ * Copyright (c) 2008 - 2011, Nicolas François
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -60,7 +60,6 @@ void login_prompt (const char *prompt, char *name, int namesize)
 
 #define MAX_ENV 32
 	char *envp[MAX_ENV];
-	int envc;
 	char *cp;
 	int i;
 	FILE *fp;
@@ -88,9 +87,9 @@ void login_prompt (const char *prompt, char *name, int namesize)
 	 */
 
 	if (NULL != prompt) {
-		cp = getdef_str ("ISSUE_FILE");
+		const char *fname = getdef_str ("ISSUE_FILE");
-		if (NULL != cp) {
+		if (NULL != fname) {
-			fp = fopen (cp, "r");
+			fp = fopen (fname, "r");
 			if (NULL != fp) {
 				while ((i = getc (fp)) != EOF) {
 					(void) putc (i, stdout);
@@ -99,7 +98,7 @@ void login_prompt (const char *prompt, char *name, int namesize)
 				(void) fclose (fp);
 			}
 		}
-		gethostname (buf, sizeof buf);
+		(void) gethostname (buf, sizeof buf);
 		printf (prompt, buf);
 		(void) fflush (stdout);
 	}
@@ -148,6 +147,7 @@ void login_prompt (const char *prompt, char *name, int namesize)
 	if ('\0' != *cp) {	/* process new variables */
 		char *nvar;
 		int count = 1;
+		int envc;
 
 		for (envc = 0; envc < MAX_ENV; envc++) {
 			nvar = strtok ((0 != envc) ? (char *) 0 : cp, " \t,");
@@ -158,10 +158,9 @@ void login_prompt (const char *prompt, char *name, int namesize)
 				envp[envc] = nvar;
 			} else {
 				size_t len = strlen (nvar) + 32;
-				int wlen;
 				envp[envc] = xmalloc (len);
-				wlen = snprintf (envp[envc], len, "L%d=%s", count++, nvar);
+				(void) snprintf (envp[envc], len,
-				assert (wlen == (int) len -1);
+				                 "L%d=%s", count++, nvar);
 			}
 		}
 		set_env (envc, envp);

libmisc/motd.c

@@ -2,6 +2,7 @@
  * Copyright (c) 1989 - 1991, Julianne Frances Haugh
  * Copyright (c) 1996 - 1997, Marek Michałkiewicz
  * Copyright (c) 2003 - 2005, Tomasz Kłoczko
+ * Copyright (c) 2010       , Nicolas François
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -47,21 +48,34 @@
 void motd (void)
 {
 	FILE *fp;
-	char motdlist[BUFSIZ], *motdfile, *mb;
+	char *motdlist;
+	const char *motdfile;
+	char *mb;
 	register int c;
 
-	if ((mb = getdef_str ("MOTD_FILE")) == NULL)
+	motdfile = getdef_str ("MOTD_FILE");
+	if (NULL == motdfile) {
 		return;
+	}
 
-	strncpy (motdlist, mb, sizeof (motdlist));
+	motdlist = xstrdup (motdfile);
-	motdlist[sizeof (motdlist) - 1] = '\0';
 
-	for (mb = motdlist; (motdfile = strtok (mb, ":")) != NULL; mb = NULL) {
+	for (mb = motdlist; ;mb = NULL) {
-		if ((fp = fopen (motdfile, "r")) != NULL) {
+		motdfile = strtok (mb, ":");
-			while ((c = getc (fp)) != EOF)
+		if (NULL == motdfile) {
+			break;
+		}
+
+		fp = fopen (motdfile, "r");
+		if (NULL != fp) {
+			while ((c = getc (fp)) != EOF) {
 				putchar (c);
+			}
 			fclose (fp);
 		}
 	}
 	fflush (stdout);
+
+	free (motdlist);
 }
+

libmisc/obscure.c

@@ -2,7 +2,7 @@
  * Copyright (c) 1989 - 1994, Julianne Frances Haugh
  * Copyright (c) 1996 - 1999, Marek Michałkiewicz
  * Copyright (c) 2003 - 2005, Tomasz Kłoczko
- * Copyright (c) 2007 - 2008, Nicolas François
+ * Copyright (c) 2007 - 2010, Nicolas François
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -69,7 +69,7 @@ static bool palindrome (unused const char *old, const char *new)
  * more than half of the characters are different ones.
  */
 
-static bool similar (const char *old, const char *new)
+static bool similar (/*@notnull@*/const char *old, /*@notnull@*/const char *new)
 {
 	int i, j;
 
@@ -100,7 +100,7 @@ static bool similar (const char *old, const char *new)
  * a nice mix of characters.
  */
 
-static int simple (unused const char *old, const char *new)
+static bool simple (unused const char *old, const char *new)
 {
 	bool digits = false;
 	bool uppers = false;
@@ -147,7 +147,7 @@ static int simple (unused const char *old, const char *new)
 	return true;
 }
 
-static char *str_lower (char *string)
+static char *str_lower (/*@returned@*/char *string)
 {
 	char *cp;
 
@@ -157,8 +157,10 @@ static char *str_lower (char *string)
 	return string;
 }
 
-static const char *password_check (const char *old, const char *new,
+static /*@observer@*//*@null@*/const char *password_check (
-				   const struct passwd *pwdp)
+	/*@notnull@*/const char *old,
+	/*@notnull@*/const char *new,
+	/*@notnull@*/const struct passwd *pwdp)
 {
 	const char *msg = NULL;
 	char *oldmono, *newmono, *wrapped;
@@ -219,14 +221,15 @@ static const char *password_check (const char *old, const char *new,
 	return msg;
 }
 
-/*ARGSUSED*/
+static /*@observer@*//*@null@*/const char *obscure_msg (
-static const char *obscure_msg (const char *old, const char *new,
+	/*@notnull@*/const char *old,
-				    const struct passwd *pwdp)
+	/*@notnull@*/const char *new,
+	/*@notnull@*/const struct passwd *pwdp)
 {
 	size_t maxlen, oldlen, newlen;
 	char *new1, *old1;
 	const char *msg;
-	char *result;
+	const char *result;
 
 	oldlen = strlen (old);
 	newlen = strlen (new);
@@ -304,15 +307,15 @@ static const char *obscure_msg (const char *old, const char *new,
  *	check passwords.
  */
 
-int obscure (const char *old, const char *new, const struct passwd *pwdp)
+bool obscure (const char *old, const char *new, const struct passwd *pwdp)
 {
 	const char *msg = obscure_msg (old, new, pwdp);
 
 	if (NULL != msg) {
 		printf (_("Bad password: %s.  "), msg);
-		return 0;
+		return false;
 	}
-	return 1;
+	return true;
 }
 
 #else				/* !USE_PAM */

libmisc/pam_pass_non_interractive.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c)        2009, Nicolas François
+ * Copyright (c) 2009 - 2010, Nicolas François
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -39,7 +39,7 @@
 #include <security/pam_appl.h>
 #include "prototypes.h"
 
-/*@null@*/ /*@only@*/static char *non_interactive_password = NULL;
+/*@null@*/ /*@only@*/static const char *non_interactive_password = NULL;
 static int ni_conv (int num_msg,
                     const struct pam_message **msg,
                     struct pam_response **resp,

libmisc/remove_tree.c

@@ -0,0 +1,133 @@
+/*
+ * Copyright (c) 1991 - 1994, Julianne Frances Haugh
+ * Copyright (c) 1996 - 2001, Marek Michałkiewicz
+ * Copyright (c) 2003 - 2006, Tomasz Kłoczko
+ * Copyright (c) 2007 - 2010, Nicolas François
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the copyright holders or contributors may not be used to
+ *    endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <dirent.h>
+#include <unistd.h>
+#include "prototypes.h"
+#include "defines.h"
+
+/*
+ * remove_tree - delete a directory tree
+ *
+ *	remove_tree() walks a directory tree and deletes all the files
+ *	and directories.
+ *	At the end, it deletes the root directory itself.
+ */
+
+int remove_tree (const char *root, bool remove_root)
+{
+	char *new_name = NULL;
+	int err = 0;
+	struct DIRECT *ent;
+	struct stat sb;
+	DIR *dir;
+
+	/*
+	 * Open the source directory and read each entry.  Every file
+	 * entry in the directory is copied with the UID and GID set
+	 * to the provided values.  As an added security feature only
+	 * regular files (and directories ...) are copied, and no file
+	 * is made set-ID.
+	 */
+	dir = opendir (root);
+	if (NULL == dir) {
+		return -1;
+	}
+
+	while ((ent = readdir (dir))) {
+		size_t new_len = strlen (root) + strlen (ent->d_name) + 2;
+
+		/*
+		 * Skip the "." and ".." entries
+		 */
+
+		if (strcmp (ent->d_name, ".") == 0 ||
+		    strcmp (ent->d_name, "..") == 0) {
+			continue;
+		}
+
+		/*
+		 * Make the filename for the current entry.
+		 */
+
+		free (new_name);
+		new_name = (char *) malloc (new_len);
+		if (NULL == new_name) {
+			err = -1;
+			break;
+		}
+		(void) snprintf (new_name, new_len, "%s/%s", root, ent->d_name);
+		if (LSTAT (new_name, &sb) == -1) {
+			continue;
+		}
+
+		if (S_ISDIR (sb.st_mode)) {
+			/*
+			 * Recursively delete this directory.
+			 */
+			if (remove_tree (new_name, true) != 0) {
+				err = -1;
+				break;
+			}
+		} else {
+			/*
+			 * Delete the file.
+			 */
+			if (unlink (new_name) != 0) {
+				err = -1;
+				break;
+			}
+		}
+	}
+	if (NULL != new_name) {
+		free (new_name);
+	}
+	(void) closedir (dir);
+
+	if (remove_root && (0 == err)) {
+		if (rmdir (root) != 0) {
+			err = -1;
+		}
+	}
+
+	return err;
+}
+

libmisc/root_flag.c

@@ -0,0 +1,124 @@
+/*
+ * Copyright (c) 2011       , Julian Pidancet
+ * Copyright (c) 2011       , Nicolas François
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the copyright holders or contributors may not be used to
+ *    endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <stdio.h>
+#include <assert.h>
+#include "defines.h"
+#include "prototypes.h"
+/*@-exitarg@*/
+#include "exitcodes.h"
+
+static void change_root (const char* newroot);
+
+/*
+ * process_root_flag - chroot if given the --root option
+ *
+ * This shall be called before accessing the passwd, group, shadow,
+ * gshadow, useradd's default, login.defs files (non exhaustive list)
+ * or authenticating the caller.
+ *
+ * The audit, syslog, or locale files shall be open before
+ */
+extern void process_root_flag (const char* short_opt, int argc, char **argv)
+{
+	/*
+	 * Parse the command line options.
+	 */
+	int i;
+	const char *newroot = NULL;
+
+	for (i = 0; i < argc; i++) {
+		if (   (strcmp (argv[i], "--root") == 0)
+		    || (strcmp (argv[i], short_opt) == 0)) {
+			if (NULL != newroot) {
+				fprintf (stderr,
+				         _("%s: multiple --root options\n"),
+				         Prog);
+				exit (E_BAD_ARG);
+			}
+
+			if (i + 1 == argc) {
+				fprintf (stderr,
+				         _("%s: option '%s' requires an argument\n"),
+				         Prog, argv[i]);
+				exit (E_BAD_ARG);
+			}
+			newroot = argv[i + 1];
+		}
+	}
+
+	if (NULL != newroot) {
+		change_root (newroot);
+	}
+}
+
+static void change_root (const char* newroot)
+{
+	/* Drop privileges */
+	if (   (setregid (getgid (), getgid ()) != 0)
+	    || (setreuid (getuid (), getuid ()) != 0)) {
+		fprintf (stderr, _("%s: failed to drop privileges (%s)\n"),
+		         Prog, strerror (errno));
+		exit (EXIT_FAILURE);
+	}
+
+	if ('/' != newroot[0]) {
+		fprintf (stderr,
+		         _("%s: invalid chroot path '%s'\n"),
+		         Prog, newroot);
+		exit (E_BAD_ARG);
+	}
+
+	if (access (newroot, F_OK) != 0) {
+		fprintf(stderr,
+		        _("%s: cannot access chroot directory %s: %s\n"),
+		        Prog, newroot, strerror (errno));
+		exit (E_BAD_ARG);
+	}
+
+	if (chdir (newroot) != 0) {
+		fprintf(stderr,
+				_("%s: cannot chdir to chroot directory %s: %s\n"),
+				Prog, newroot, strerror (errno));
+		exit (E_BAD_ARG);
+	}
+
+	if (chroot (newroot) != 0) {
+		fprintf(stderr,
+		        _("%s: unable to chroot to directory %s: %s\n"),
+		        Prog, newroot, strerror (errno));
+		exit (E_BAD_ARG);
+	}
+}
+

libmisc/salt.c

@@ -23,7 +23,7 @@
 static void seedRNG (void);
 static /*@observer@*/const char *gensalt (size_t salt_size);
 #ifdef USE_SHA_CRYPT
-static size_t SHA_salt_size (void);
+static long shadow_random (long min, long max);
 static /*@observer@*/const char *SHA_salt_rounds (/*@null@*/int *prefered_rounds);
 #endif /* USE_SHA_CRYPT */
 
@@ -81,17 +81,29 @@ static void seedRNG (void)
 #define MAGNUM(array,ch)	(array)[0]=(array)[2]='$',(array)[1]=(ch),(array)[3]='\0'
 
 #ifdef USE_SHA_CRYPT
+/* It is not clear what is the maximum value of random().
+ * We assume 2^31-1.*/
+#define RANDOM_MAX 0x7FFFFFFF
+
 /*
- * Return the salt size.
+ * Return a random number between min and max (both included).
- * The size of the salt string is between 8 and 16 bytes for the SHA crypt
+ *
- * methods.
+ * It favors slightly the higher numbers.
  */
-static size_t SHA_salt_size (void)
+static long shadow_random (long min, long max)
 {
-	double rand_size;
+	double drand;
+	long ret;
 	seedRNG ();
-	rand_size = (double) 9.0 * random () / RAND_MAX;
+	drand = (double) (max - min + 1) * random () / RANDOM_MAX;
-	return (size_t) (8 + rand_size);
+	/* On systems were this is not random() range is lower, we favor
+	 * higher numbers of salt. */
+	ret = (long) (max + 1 - drand);
+	/* And we catch limits, and use the highest number */
+	if ((ret < min) || (ret > max)) {
+		ret = max;
+	}
+	return ret;
 }
 
 /* Default number of rounds if not explicitly specified.  */
@@ -106,13 +118,12 @@ static size_t SHA_salt_size (void)
  */
 static /*@observer@*/const char *SHA_salt_rounds (/*@null@*/int *prefered_rounds)
 {
-	static char rounds_prefix[18];
+	static char rounds_prefix[18]; /* Max size: rounds=999999999$ */
 	long rounds;
 
 	if (NULL == prefered_rounds) {
 		long min_rounds = getdef_long ("SHA_CRYPT_MIN_ROUNDS", -1);
 		long max_rounds = getdef_long ("SHA_CRYPT_MAX_ROUNDS", -1);
-		double rand_rounds;
 
 		if ((-1 == min_rounds) && (-1 == max_rounds)) {
 			return "";
@@ -130,10 +141,7 @@ static /*@observer@*/const char *SHA_salt_rounds (/*@null@*/int *prefered_rounds
 			max_rounds = min_rounds;
 		}
 
-		seedRNG ();
+		rounds = shadow_random (min_rounds, max_rounds);
-		rand_rounds = (double) (max_rounds-min_rounds+1.0) * random ();
-		rand_rounds /= RAND_MAX;
-		rounds = min_rounds + rand_rounds;
 	} else if (0 == *prefered_rounds) {
 		return "";
 	} else {
@@ -150,13 +158,8 @@ static /*@observer@*/const char *SHA_salt_rounds (/*@null@*/int *prefered_rounds
 		rounds = ROUNDS_MAX;
 	}
 
-	snprintf (rounds_prefix, 18, "rounds=%ld$", rounds);
+	(void) snprintf (rounds_prefix, sizeof rounds_prefix,
-
+	                 "rounds=%ld$", rounds);
-	/* Sanity checks. That should not be necessary. */
-	rounds_prefix[17] = '\0';
-	if ('$' != rounds_prefix[16]) {
-		rounds_prefix[17] = '$';
-	}
 
 	return rounds_prefix;
 }
@@ -202,7 +205,7 @@ static /*@observer@*/const char *gensalt (size_t salt_size)
  *  * For the SHA256 and SHA512 method, this specifies the number of rounds
  *    (if not NULL).
  */
-/*@observer@*/const char *crypt_make_salt (/*@null@*/const char *meth, /*@null@*/void *arg)
+/*@observer@*/const char *crypt_make_salt (/*@null@*//*@observer@*/const char *meth, /*@null@*/void *arg)
 {
 	/* Max result size for the SHA methods:
 	 *  +3		$5$
@@ -231,11 +234,11 @@ static /*@observer@*/const char *gensalt (size_t salt_size)
 	} else if (0 == strcmp (method, "SHA256")) {
 		MAGNUM(result, '5');
 		strcat(result, SHA_salt_rounds((int *)arg));
-		salt_len = SHA_salt_size();
+		salt_len = (size_t) shadow_random (8, 16);
 	} else if (0 == strcmp (method, "SHA512")) {
 		MAGNUM(result, '6');
 		strcat(result, SHA_salt_rounds((int *)arg));
-		salt_len = SHA_salt_size();
+		salt_len = (size_t) shadow_random (8, 16);
 #endif /* USE_SHA_CRYPT */
 	} else if (0 != strcmp (method, "DES")) {
 		fprintf (stderr,

libmisc/setugid.c

@@ -2,7 +2,7 @@
  * Copyright (c) 1989 - 1994, Julianne Frances Haugh
  * Copyright (c) 1996 - 1998, Marek Michałkiewicz
  * Copyright (c) 2003 - 2005, Tomasz Kłoczko
- * Copyright (c) 2008 - 2009, Nicolas François
+ * Copyright (c) 2008 - 2010, Nicolas François
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -131,7 +131,7 @@ int setup_uid_gid (const struct passwd *info)
 
 #if defined (HAVE_INITGROUPS) && ! defined (USE_PAM)
 	if (is_console) {
-		char *cp = getdef_str ("CONSOLE_GROUPS");
+		const char *cp = getdef_str ("CONSOLE_GROUPS");
 
 		if ((NULL != cp) && (add_groups (cp) != 0)) {
 			perror ("Warning: add_groups");

libmisc/setupenv.c

@@ -2,7 +2,7 @@
  * Copyright (c) 1989 - 1994, Julianne Frances Haugh
  * Copyright (c) 1996 - 2000, Marek Michałkiewicz
  * Copyright (c) 2001 - 2006, Tomasz Kłoczko
- * Copyright (c) 2007 - 2009, Nicolas François
+ * Copyright (c) 2007 - 2010, Nicolas François
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -74,7 +74,7 @@ static void read_env_file (const char *filename)
 	if (NULL == fp) {
 		return;
 	}
-	while (fgets (buf, sizeof buf, fp) == buf) {
+	while (fgets (buf, (int)(sizeof buf), fp) == buf) {
 		cp = strrchr (buf, '\n');
 		if (NULL == cp) {
 			break;
@@ -200,9 +200,9 @@ static void read_env_file (const char *filename)
 void setup_env (struct passwd *info)
 {
 #ifndef USE_PAM
-	char *envf;
+	const char *envf;
 #endif
-	char *cp;
+	const char *cp;
 
 	/*
 	 * Change the current working directory to be the home directory
@@ -228,7 +228,8 @@ void setup_env (struct passwd *info)
 			exit (EXIT_FAILURE);
 		}
 		(void) puts (_("No directory, logging in with HOME=/"));
-		info->pw_dir = temp_pw_dir;
+		free (info->pw_dir);
+		info->pw_dir = xstrdup (temp_pw_dir);
 	}
 
 	/*
@@ -244,7 +245,8 @@ void setup_env (struct passwd *info)
 	if ((NULL == info->pw_shell) || ('\0' == *info->pw_shell)) {
 		static char temp_pw_shell[] = SHELL;
 
-		info->pw_shell = temp_pw_shell;
+		free (info->pw_shell);
+		info->pw_shell = xstrdup (temp_pw_shell);
 	}
 
 	addenv ("SHELL", info->pw_shell);
@@ -265,7 +267,7 @@ void setup_env (struct passwd *info)
 
 	if (NULL == cp) {
 		/* not specified, use a minimal default */
-		addenv ("PATH=/bin:/usr/bin", NULL);
+		addenv ((info->pw_uid == 0) ? "PATH=/sbin:/bin:/usr/sbin:/usr/bin" : "PATH=/bin:/usr/bin", NULL);
 	} else if (strchr (cp, '=')) {
 		/* specified as name=value (PATH=...) */
 		addenv (cp, NULL);

libmisc/shell.c

@@ -68,7 +68,8 @@ int shell (const char *file, /*@null@*/const char *arg, char *const envp[])
 	 * don't want to tell us what it is themselves.
 	 */
 	if (arg == (char *) 0) {
-		snprintf (arg0, sizeof arg0, "-%s", Basename ((char *) file));
+		(void) snprintf (arg0, sizeof arg0, "-%s", Basename ((char *) file));
+		arg0[sizeof arg0 - 1] = '\0';
 		arg = arg0;
 	}
 
@@ -77,7 +78,7 @@ int shell (const char *file, /*@null@*/const char *arg, char *const envp[])
 	 * able to figure out what we are up to without too much
 	 * grief.
 	 */
-	execle (file, arg, (char *) 0, envp);
+	(void) execle (file, arg, (char *) 0, envp);
 	err = errno;
 
 	if (access (file, R_OK|X_OK) == 0) {
@@ -85,7 +86,7 @@ int shell (const char *file, /*@null@*/const char *arg, char *const envp[])
 		 * Assume this is a shell script (with no shebang).
 		 * Interpret it with /bin/sh
 		 */
-		execle (SHELL, "sh", "-", file, (char *)0, envp);
+		(void) execle (SHELL, "sh", "-", file, (char *)0, envp);
 		err = errno;
 	}
 
@@ -94,7 +95,7 @@ int shell (const char *file, /*@null@*/const char *arg, char *const envp[])
 	 * how to execute this stupid shell, so I might as well give
 	 * up in disgust ...
 	 */
-	snprintf (arg0, sizeof arg0, _("Cannot execute %s"), file);
+	(void) snprintf (arg0, sizeof arg0, _("Cannot execute %s"), file);
 	errno = err;
 	perror (arg0);
 	return err;

libmisc/strtoday.c

@@ -36,6 +36,8 @@
 
 #include <config.h>
 
+#include <ctype.h>
+
 #ident "$Id$"
 
 #include "defines.h"
@@ -44,6 +46,7 @@
 #ifndef USE_GETDATE
 #define USE_GETDATE 1
 #endif
+
 #if USE_GETDATE
 #include "getdate.h"
 /*
@@ -63,6 +66,8 @@
 long strtoday (const char *str)
 {
 	time_t t;
+	bool isnum = true;
+	const char *s = str;
 
 	/*
 	 * get_date() interprets an empty string as the current date,
@@ -73,9 +78,32 @@ long strtoday (const char *str)
 		return -1;
 	}
 
-	t = get_date (str, (time_t *) 0);
+	/* If a numerical value is provided, this is already a number of
+	 * days since EPOCH.
+	 */
+	if ('-' == *s) {
+		s++;
+	}
+	while (' ' == *s) {
+		s++;
+	}
+	while (isnum && ('\0' != *s)) {
+		if (!isdigit (*s)) {
+			isnum = false;
+		}
+		s++;
+	}
+	if (isnum) {
+		long retdate;
+		if (getlong (str, &retdate) == 0) {
+			return -2;
+		}
+		return retdate;
+	}
+
+	t = get_date (str, NULL);
 	if ((time_t) - 1 == t) {
-		return -1;
+		return -2;
 	}
 	/* convert seconds to days since 1970-01-01 */
 	return (long) (t + DAY / 2) / DAY;

libmisc/sub.c

@@ -43,7 +43,7 @@
 /*
  * subsystem - change to subsystem root
  *
- *	A subsystem login is indicated by the presense of a "*" as
+ *	A subsystem login is indicated by the presence of a "*" as
  *	the first character of the login shell.  The given home
  *	directory will be used as the root of a new filesystem which
  *	the user is actually logged into.
@@ -66,11 +66,13 @@ void subsystem (const struct passwd *pw)
 	 * must be able to change into it.
 	 */
 
-	if (chdir (pw->pw_dir) || chroot (pw->pw_dir)) {
+	if (   (chdir (pw->pw_dir) != 0)
-		printf (_("Can't change root directory to '%s'\n"),
+	    || (chroot (pw->pw_dir) != 0)) {
-			pw->pw_dir);
+		(void) printf (_("Can't change root directory to '%s'\n"),
+		               pw->pw_dir);
 		SYSLOG ((LOG_WARN, NO_SUBROOT2, pw->pw_dir, pw->pw_name));
 		closelog ();
 		exit (EXIT_FAILURE);
 	}
 }
+

libmisc/sulog.c

@@ -2,7 +2,7 @@
  * Copyright (c) 1989 - 1992, Julianne Frances Haugh
  * Copyright (c) 1996 - 2000, Marek Michałkiewicz
  * Copyright (c) 2001 - 2005, Tomasz Kłoczko
- * Copyright (c) 2008       , Nicolas François
+ * Copyright (c) 2008 - 2010, Nicolas François
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -47,7 +47,7 @@
  */
 void sulog (const char *tty, bool success, const char *oldname, const char *name)
 {
-	char *sulog_file;
+	const char *sulog_file;
 	time_t now;
 	struct tm *tm;
 	FILE *fp;
@@ -62,8 +62,10 @@ void sulog (const char *tty, bool success, const char *oldname, const char *name
 			"FAILED su for %s by %s",name,oldname));
 	}
 
-	if ((sulog_file = getdef_str ("SULOG_FILE")) == (char *) 0)
+	sulog_file = getdef_str ("SULOG_FILE");
+	if (NULL == sulog_file) {
 		return;
+	}
 
 	oldgid = getgid ();
 	oldmask = umask (077);

libmisc/ttytype.c

@@ -2,7 +2,7 @@
  * Copyright (c) 1989 - 1994, Julianne Frances Haugh
  * Copyright (c) 1996 - 1997, Marek Michałkiewicz
  * Copyright (c) 2003 - 2005, Tomasz Kłoczko
- * Copyright (c) 2008       , Nicolas François
+ * Copyright (c) 2008 - 2010, Nicolas François
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -45,10 +45,10 @@ void ttytype (const char *line)
 {
 	FILE *fp;
 	char buf[BUFSIZ];
-	char *typefile;
+	const char *typefile;
 	char *cp;
-	char type[BUFSIZ];
+	char type[1024] = "";
-	char port[BUFSIZ];
+	char port[1024];
 
 	if (getenv ("TERM") != NULL) {
 		return;
@@ -76,12 +76,12 @@ void ttytype (const char *line)
 			*cp = '\0';
 		}
 
-		if ((sscanf (buf, "%s %s", type, port) == 2) &&
+		if (   (sscanf (buf, "%1023s %1023s", type, port) == 2)
-		    (strcmp (line, port) == 0)) {
+		    && (strcmp (line, port) == 0)) {
 			break;
 		}
 	}
-	if ((feof (fp) == 0) && (ferror (fp) == 0)) {
+	if ((feof (fp) == 0) && (ferror (fp) == 0) && (type[0] != '\0')) {
 		addenv ("TERM", type);
 	}
 

libmisc/tz.c

@@ -3,7 +3,7 @@
  * Copyright (c) 1991 - 1994, Chip Rosenthal
  * Copyright (c) 1996 - 1998, Marek Michałkiewicz
  * Copyright (c) 2003 - 2005, Tomasz Kłoczko
- * Copyright (c) 2007 - 2008, Nicolas François
+ * Copyright (c) 2007 - 2010, Nicolas François
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -49,23 +49,28 @@
  * tz() determines the name of the local timezone by reading the
  * contents of the file named by ``fname''.
  */
-char *tz (const char *fname)
+/*@observer@*/const char *tz (const char *fname)
 {
-	FILE *fp = 0;
+	FILE *fp = NULL;
 	static char tzbuf[BUFSIZ];
 	const char *def_tz = "TZ=CST6CDT";
 
-	if ((fp = fopen (fname, "r")) == NULL ||
+	fp = fopen (fname, "r");
-	    fgets (tzbuf, (int) sizeof (tzbuf), fp) == NULL) {
+	if (   (NULL == fp)
-		if (!(def_tz = getdef_str ("ENV_TZ")) || def_tz[0] == '/')
+	    || (fgets (tzbuf, (int) sizeof (tzbuf), fp) == NULL)) {
+		def_tz = getdef_str ("ENV_TZ");
+		if ((NULL == def_tz) || ('/' == def_tz[0])) {
 			def_tz = "TZ=CST6CDT";
+		}
 
 		strcpy (tzbuf, def_tz);
-	} else
+	} else {
 		tzbuf[strlen (tzbuf) - 1] = '\0';
+	}
 
-	if (fp)
+	if (NULL != fp) {
 		(void) fclose (fp);
+	}
 
 	return tzbuf;
 }

libmisc/user_busy.c

@@ -38,12 +38,16 @@
 #include <stdio.h>
 #include <sys/types.h>
 #include <dirent.h>
+#include <fcntl.h>
 #include "defines.h"
 #include "prototypes.h"
+#ifdef ENABLE_SUBIDS
+#include "subordinateio.h"
+#endif				/* ENABLE_SUBIDS */
 
 #ifdef __linux__
-static int check_status (const char *sname, uid_t uid);
+static int check_status (const char *name, const char *sname, uid_t uid);
-static int user_busy_processes (uid_t uid);
+static int user_busy_processes (const char *name, uid_t uid);
 #else				/* !__linux__ */
 static int user_busy_utmp (const char *name);
 #endif				/* !__linux__ */
@@ -58,7 +62,7 @@ int user_busy (const char *name, uid_t uid)
 	 */
 #ifdef __linux__
 	/* On Linux, directly parse /proc */
-	return user_busy_processes (uid);
+	return user_busy_processes (name, uid);
 #else				/* !__linux__ */
 	/* If we cannot rely on /proc, check is there is a record in utmp
 	 * indicating that the user is still logged in */
@@ -91,6 +95,9 @@ static int user_busy_utmp (const char *name)
 			continue;
 		}
 
+		fprintf (stderr,
+		         _("%s: user %s is currently logged in\n"),
+		         Prog, name);
 		return 1;
 	}
 
@@ -99,7 +106,7 @@ static int user_busy_utmp (const char *name)
 #endif				/* !__linux__ */
 
 #ifdef __linux__
-static int check_status (const char *sname, uid_t uid)
+static int check_status (const char *name, const char *sname, uid_t uid)
 {
 	/* 40: /proc/xxxxxxxxxx/task/xxxxxxxxxx/status + \0 */
 	char status[40];
@@ -122,7 +129,13 @@ static int check_status (const char *sname, uid_t uid)
 			            &ruid, &euid, &suid) == 3) {
 				if (   (ruid == (unsigned long) uid)
 				    || (euid == (unsigned long) uid)
-				    || (suid == (unsigned long) uid)) {
+				    || (suid == (unsigned long) uid)
+#ifdef ENABLE_SUBIDS
+				    || have_sub_uids(name, ruid, 1)
+				    || have_sub_uids(name, euid, 1)
+				    || have_sub_uids(name, suid, 1)
+#endif				/* ENABLE_SUBIDS */
+				   ) {
 					(void) fclose (sfile);
 					return 1;
 				}
@@ -137,7 +150,7 @@ static int check_status (const char *sname, uid_t uid)
 	return 0;
 }
 
-static int user_busy_processes (uid_t uid)
+static int user_busy_processes (const char *name, uid_t uid)
 {
 	DIR *proc;
 	struct dirent *ent;
@@ -150,6 +163,10 @@ static int user_busy_processes (uid_t uid)
 	struct stat sbroot;
 	struct stat sbroot_process;
 
+#ifdef ENABLE_SUBIDS
+	sub_uid_open (O_RDONLY);
+#endif				/* ENABLE_SUBIDS */
+
 	proc = opendir ("/proc");
 	if (proc == NULL) {
 		perror ("opendir /proc");
@@ -158,6 +175,9 @@ static int user_busy_processes (uid_t uid)
 	if (stat ("/", &sbroot) != 0) {
 		perror ("stat (\"/\")");
 		(void) closedir (proc);
+#ifdef ENABLE_SUBIDS
+		sub_uid_close();
+#endif
 		return 0;
 	}
 
@@ -193,8 +213,14 @@ static int user_busy_processes (uid_t uid)
 			continue;
 		}
 
-		if (check_status (tmp_d_name, uid) != 0) {
+		if (check_status (name, tmp_d_name, uid) != 0) {
 			(void) closedir (proc);
+#ifdef ENABLE_SUBIDS
+			sub_uid_close();
+#endif
+			fprintf (stderr,
+			         _("%s: user %s is currently used by process %d\n"),
+			         Prog, name, pid);
 			return 1;
 		}
 
@@ -210,8 +236,14 @@ static int user_busy_processes (uid_t uid)
 				if (tid == pid) {
 					continue;
 				}
-				if (check_status (task_path+6, uid) != 0) {
+				if (check_status (name, task_path+6, uid) != 0) {
 					(void) closedir (proc);
+#ifdef ENABLE_SUBIDS
+					sub_uid_close();
+#endif
+					fprintf (stderr,
+					         _("%s: user %s is currently used by process %d\n"),
+					         Prog, name, pid);
 					return 1;
 				}
 			}
@@ -222,6 +254,9 @@ static int user_busy_processes (uid_t uid)
 	}
 
 	(void) closedir (proc);
+#ifdef ENABLE_SUBIDS
+	sub_uid_close();
+#endif				/* ENABLE_SUBIDS */
 	return 0;
 }
 #endif				/* __linux__ */

libmisc/utmp.c

@@ -42,6 +42,8 @@
 #endif
 
 #include <assert.h>
+#include <sys/types.h>
+#include <sys/socket.h>
 #include <netdb.h>
 #include <stdio.h>
 
@@ -71,7 +73,7 @@ static bool is_my_tty (const char *tty)
 		}
 	}
 
-	if (NULL == tmptty) {
+	if ('\0' == tmptty[0]) {
 		(void) puts (_("Unable to determine your tty name."));
 		exit (EXIT_FAILURE);
 	} else if (strncmp (tty, tmptty, sizeof (tmptty)) != 0) {
@@ -129,6 +131,7 @@ static bool is_my_tty (const char *tty)
 	return ret;
 }
 
+#ifndef USE_PAM
 /*
  * Some systems already have updwtmp() and possibly updwtmpx().  Others
  * don't, so we re-implement these functions if necessary.
@@ -160,6 +163,7 @@ static void updwtmpx (const char *filename, const struct utmpx *utx)
 }
 #endif				/* ! HAVE_UPDWTMPX */
 #endif				/* ! USE_UTMPX */
+#endif				/* ! USE_PAM */
 
 
 /*
@@ -200,7 +204,6 @@ static void updwtmpx (const char *filename, const struct utmpx *utx)
 		strcpy (hostname, host);
 #ifdef HAVE_STRUCT_UTMP_UT_HOST
 	} else if (   (NULL != ut)
-	           && (NULL != ut->ut_host)
 	           && ('\0' != ut->ut_host[0])) {
 		hostname = (char *) xmalloc (sizeof (ut->ut_host) + 1);
 		strncpy (hostname, ut->ut_host, sizeof (ut->ut_host));
@@ -314,7 +317,10 @@ int setutmp (struct utmp *ut)
 	}
 	endutent ();
 
+#ifndef USE_PAM
+	/* This is done by pam_lastlog */
 	updwtmp (_WTMP_FILE, ut);
+#endif				/* ! USE_PAM */
 
 	return err;
 }
@@ -447,7 +453,10 @@ int setutmpx (struct utmpx *utx)
 	}
 	endutxent ();
 
+#ifndef USE_PAM
+	/* This is done by pam_lastlog */
 	updwtmpx (_WTMP_FILE "x", utx);
+#endif				/* ! USE_PAM */
 
 	return err;
 }

libmisc/valid.c

@@ -52,7 +52,7 @@
 bool valid (const char *password, const struct passwd *ent)
 {
 	const char *encrypted;
-	const char *salt;
+	/*@observer@*/const char *salt;
 
 	/*
 	 * Start with blank or empty password entries.  Always encrypt
@@ -95,6 +95,7 @@ bool valid (const char *password, const struct passwd *ent)
 	 */
 
 	if (   (NULL != ent->pw_name)
+	    && (NULL != encrypted)
 	    && (strcmp (encrypted, ent->pw_passwd) == 0)) {
 		return true;
 	} else {

libmisc/xgetXXbyYY.c

@@ -91,7 +91,7 @@
 		errno = 0;
 		status = REENTRANT_NAME(ARG_NAME, result, buffer,
 		                        length, &resbuf);
-		if ((0 ==status) && (resbuf == result)) {
+		if ((0 == status) && (resbuf == result)) {
 			/* Build a result structure that can be freed by
 			 * the shadow *_free functions. */
 			LOOKUP_TYPE *ret_result = DUP_FUNCTION(result);

libmisc/xmalloc.c

@@ -44,22 +44,25 @@
 #ident "$Id$"
 
 #include <stdio.h>
+#include <errno.h>
 #include "defines.h"
 #include "prototypes.h"
 
-char *xmalloc (size_t size)
+/*@maynotreturn@*/ /*@only@*//*@out@*//*@notnull@*/char *xmalloc (size_t size)
 {
 	char *ptr;
 
 	ptr = (char *) malloc (size);
-	if ((NULL == ptr) && (0 != size)) {
+	if (NULL == ptr) {
-		fprintf (stderr, _("malloc(%d) failed\n"), (int) size);
+		(void) fprintf (stderr,
+		                _("%s: failed to allocate memory: %s\n"),
+		                Prog, strerror (errno));
 		exit (13);
 	}
 	return ptr;
 }
 
-char *xstrdup (const char *str)
+/*@maynotreturn@*/ /*@only@*//*@notnull@*/char *xstrdup (const char *str)
 {
 	return strcpy (xmalloc (strlen (str) + 1), str);
 }

man/.gitignore

@@ -1,5 +1,6 @@
 .xml2po.mo
 config.xml
+generate_mans.deps
 
 *.[0-9]
 

man/Makefile.am

@@ -1,63 +1,73 @@
 
 # subdirectories for translated manual pages
 if USE_NLS
-SUBDIRS = po cs de es fi fr hu id it ja ko pl pt_BR ru sv tr zh_CN zh_TW
+SUBDIRS = po cs da de es fi fr hu id it ja ko pl pt_BR ru sv tr zh_CN zh_TW
 else
 SUBDIRS =
 endif
 
 man_MANS = \
-	chage.1 \
+	man1/chage.1 \
-	chfn.1 \
+	man1/chfn.1 \
-	chgpasswd.8 \
+	man8/chgpasswd.8 \
-	chpasswd.8 \
+	man8/chpasswd.8 \
-	chsh.1 \
+	man1/chsh.1 \
-	expiry.1 \
+	man1/expiry.1 \
-	faillog.5 \
+	man5/faillog.5 \
-	faillog.8 \
+	man8/faillog.8 \
-	getspnam.3 \
+	man3/getspnam.3 \
-	gpasswd.1 \
+	man1/gpasswd.1 \
-	groupadd.8 \
+	man8/groupadd.8 \
-	groupdel.8 \
+	man8/groupdel.8 \
-	groupmems.8 \
+	man8/groupmems.8 \
-	groupmod.8 \
+	man8/groupmod.8 \
-	groups.1 \
+	man1/groups.1 \
-	grpck.8 \
+	man8/grpck.8 \
-	grpconv.8 \
+	man8/grpconv.8 \
-	grpunconv.8 \
+	man8/grpunconv.8 \
-	gshadow.5 \
+	man5/gshadow.5 \
-	lastlog.8 \
+	man8/lastlog.8 \
-	login.1 \
+	man1/login.1 \
-	login.defs.5 \
+	man5/login.defs.5 \
-	logoutd.8 \
+	man8/logoutd.8 \
-	newgrp.1 \
+	man1/newgrp.1 \
-	newusers.8 \
+	man8/newusers.8 \
-	nologin.8 \
+	man8/nologin.8 \
-	passwd.1 \
+	man1/passwd.1 \
-	passwd.5 \
+	man5/passwd.5 \
-	pwck.8 \
+	man8/pwck.8 \
-	pwconv.8 \
+	man8/pwconv.8 \
-	pwunconv.8 \
+	man8/pwunconv.8 \
-	sg.1 \
+	man1/sg.1 \
-	shadow.3 \
+	man3/shadow.3 \
-	shadow.5 \
+	man5/shadow.5 \
-	su.1 \
+	man1/su.1 \
-	suauth.5 \
+	man5/suauth.5 \
-	useradd.8 \
+	man8/useradd.8 \
-	userdel.8 \
+	man8/userdel.8 \
-	usermod.8 \
+	man8/usermod.8 \
-	vigr.8 \
+	man8/vigr.8 \
-	vipw.8
+	man8/vipw.8
 
 man_nopam = \
-	limits.5 \
+	man5/limits.5 \
-	login.access.5 \
+	man5/login.access.5 \
-	porttime.5
+	man5/porttime.5
 
 if !USE_PAM
 man_MANS += $(man_nopam)
 endif
 
+man_subids = \
+	man1/newgidmap.1 \
+	man1/newuidmap.1 \
+	man5/subgid.5 \
+	man5/subuid.5
+
+if ENABLE_SUBIDS
+man_MANS += $(man_subids)
+endif
+
 man_XMANS = \
 	chage.1.xml \
 	chfn.1.xml \
@@ -81,7 +91,9 @@ man_XMANS = \
 	login.access.5.xml \
 	login.defs.5.xml \
 	logoutd.8.xml \
+	newgidmap.1.xml \
 	newgrp.1.xml \
+	newuidmap.1.xml \
 	newusers.8.xml \
 	nologin.8.xml \
 	passwd.1.xml \
@@ -94,6 +106,8 @@ man_XMANS = \
 	sg.1.xml \
 	su.1.xml \
 	suauth.5.xml \
+	subgid.5.xml \
+	subuid.5.xml \
 	useradd.8.xml \
 	userdel.8.xml \
 	usermod.8.xml \
@@ -149,6 +163,8 @@ login_defs_v = \
 	SU_WHEEL_ONLY.xml \
 	SYSLOG_SG_ENAB.xml \
 	SYSLOG_SU_ENAB.xml \
+	TCB_AUTH_GROUP.xml \
+	TCB_SYMLINKS.xml \
 	TTYGROUP.xml \
 	TTYTYPE_FILE.xml \
 	UID_MAX.xml \
@@ -156,6 +172,9 @@ login_defs_v = \
 	UMASK.xml \
 	USERDEL_CMD.xml \
 	USERGROUPS_ENAB.xml \
+	USE_TCB.xml \
+	SUB_GID_COUNT.xml \
+	SUB_UID_COUNT.xml \
 	SYS_GID_MAX.xml \
 	SYS_UID_MAX.xml
 
@@ -163,24 +182,32 @@ EXTRA_DIST = \
 	$(man_MANS) \
 	$(man_XMANS) \
 	$(addprefix login.defs.d/,$(login_defs_v)) \
-	$(man_nopam) \
+	man1/id.1 \
-	id.1 \
 	id.1.xml \
-	sulogin.8 \
+	man8/sulogin.8 \
 	sulogin.8.xml \
 	generate_mans.mak \
 	generate_translations.mak
 
+if USE_PAM
+EXTRA_DIST += $(man_nopam)
+endif
+
+if !ENABLE_SUBIDS
+EXTRA_DIST += $(man_subids)
+endif
+
 generate_mans.deps: *.xml
-	awk 'BEGIN{FS="\"";} /^<!ENTITY .* * SYSTEM ".*">$$/{ f=FILENAME; sub(/.xml/,"",f); print f ": " $$2 }' $(man_XMANS) > $@
+	echo "# This file is generated" > $@
+	awk 'BEGIN{FS="\"";} /^<!ENTITY .* * SYSTEM ".*">$$/{ f=FILENAME; sub(/.xml/,"",f); print "man" substr(f, length (f)) "/" f ": " $$2 }' $(man_XMANS) >> $@
 
 if ENABLE_REGENERATE_MAN
 
-include generate_mans.deps
+@ENABLE_REGENERATE_MAN_TRUE@include generate_mans.deps
 
 include generate_mans.mak
 
-CLEANFILES = $(man_MANS)
+CLEANFILES = $(man_MANS) man1/id.1 man8/sulogin.8
 
 else
 $(man_MANS):

man/chage.1.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
    Copyright (c) 1990 - 1994, Julianne Frances Haugh
-   Copyright (c) 2007 - 2008, Nicolas François
+   Copyright (c) 2007 - 2011, Nicolas François
    All rights reserved.
   
    Redistribution and use in source and binary forms, with or without
@@ -28,12 +28,38 @@
    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
    OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 -->
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook V4.5//EN"
+  "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
+<!ENTITY USE_TCB               SYSTEM "login.defs.d/USE_TCB.xml">
+<!-- SHADOW-CONFIG-HERE -->
+]>
 <refentry id='chage.1'>
   <!--  $Id$  -->
+  <refentryinfo>
+    <author>
+      <firstname>Julianne Frances</firstname>
+      <surname>Haugh</surname>
+      <contrib>Creation, 1990</contrib>
+    </author>
+    <author>
+      <firstname>Thomas</firstname>
+      <surname>Kłoczko</surname>
+      <email>kloczek@pld.org.pl</email>
+      <contrib>shadow-utils maintainer, 2000 - 2007</contrib>
+    </author>
+    <author>
+      <firstname>Nicolas</firstname>
+      <surname>François</surname>
+      <email>nicolas.francois@centraliens.net</email>
+      <contrib>shadow-utils maintainer, 2007 - now</contrib>
+    </author>
+  </refentryinfo>
   <refmeta>
     <refentrytitle>chage</refentrytitle>
     <manvolnum>1</manvolnum>
     <refmiscinfo class="sectdesc">User Commands</refmiscinfo>
+    <refmiscinfo class="source">shadow-utils</refmiscinfo>
+    <refmiscinfo class="version">&SHADOW_UTILS_VERSION;</refmiscinfo>
   </refmeta>
   <refnamediv id='name'>
     <refname>chage</refname>
@@ -45,8 +71,8 @@
       <arg choice='opt'>
 	<replaceable>options</replaceable>
       </arg>
-      <arg choice='opt'>
+      <arg choice='plain'>
-        <replaceable>LOGIN</replaceable>
+	<replaceable>LOGIN</replaceable>
       </arg>
     </cmdsynopsis>
   </refsynopsisdiv>
@@ -69,7 +95,7 @@
     <variablelist remap='IP'>
       <varlistentry>
 	<term>
-	  <option>-d</option>, <option>--lastday</option> <replaceable>LAST_DAY</replaceable>
+	  <option>-d</option>, <option>--lastday</option>&nbsp;<replaceable>LAST_DAY</replaceable>
 	</term>
 	<listitem>
 	  <para>
@@ -81,7 +107,7 @@
       </varlistentry>
       <varlistentry>
 	<term>
-	  <option>-E</option>, <option>--expiredate</option> <replaceable>EXPIRE_DATE</replaceable>
+	  <option>-E</option>, <option>--expiredate</option>&nbsp;<replaceable>EXPIRE_DATE</replaceable>
 	</term>
 	<listitem>
 	  <para>
@@ -107,7 +133,7 @@
       </varlistentry>
       <varlistentry>
 	<term>
-	  <option>-I</option>, <option>--inactive</option> <replaceable>INACTIVE</replaceable>
+	  <option>-I</option>, <option>--inactive</option>&nbsp;<replaceable>INACTIVE</replaceable>
 	</term>
 	<listitem>
 	  <para>
@@ -136,7 +162,7 @@
       </varlistentry>
       <varlistentry>
 	<term>
-	  <option>-m</option>, <option>--mindays</option> <replaceable>MIN_DAYS</replaceable>
+	  <option>-m</option>, <option>--mindays</option>&nbsp;<replaceable>MIN_DAYS</replaceable>
 	</term>
 	<listitem>
 	  <para>
@@ -148,7 +174,7 @@
       </varlistentry>
       <varlistentry>
 	<term>
-	  <option>-M</option>, <option>--maxdays</option> <replaceable>MAX_DAYS</replaceable>
+	  <option>-M</option>, <option>--maxdays</option>&nbsp;<replaceable>MAX_DAYS</replaceable>
 	</term>
 	<listitem>
 	  <para>
@@ -169,7 +195,19 @@
       </varlistentry>
       <varlistentry>
 	<term>
-	  <option>-W</option>, <option>--warndays</option> <replaceable>WARN_DAYS</replaceable>
+	  <option>-R</option>, <option>--root</option>&nbsp;<replaceable>CHROOT_DIR</replaceable>
+	</term>
+	<listitem>
+	  <para>
+	    Apply changes in the <replaceable>CHROOT_DIR</replaceable>
+	    directory and use the configuration files from the
+	    <replaceable>CHROOT_DIR</replaceable> directory.
+	  </para>
+	</listitem>
+      </varlistentry>
+      <varlistentry>
+	<term>
+	  <option>-W</option>, <option>--warndays</option>&nbsp;<replaceable>WARN_DAYS</replaceable>
 	</term>
 	<listitem>
 	  <para>
@@ -202,6 +240,18 @@
     </para>
   </refsect1>
 
+  <refsect1 id='configuration'>
+    <title>CONFIGURATION</title>
+    <para>
+      The following configuration variables in
+      <filename>/etc/login.defs</filename> change the behavior of this
+      tool:
+    </para>
+    <variablelist>
+      &USE_TCB;
+    </variablelist>
+  </refsect1>
+
   <refsect1 id='files'>
     <title>FILES</title>
     <variablelist>

man/chfn.1.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
    Copyright (c) 1990 - 1994, Julianne Frances Haugh
-   Copyright (c) 2007 - 2008, Nicolas François
+   Copyright (c) 2007 - 2011, Nicolas François
    All rights reserved.
   
    Redistribution and use in source and binary forms, with or without
@@ -33,14 +33,35 @@
 <!ENTITY CHFN_AUTH             SYSTEM "login.defs.d/CHFN_AUTH.xml">
 <!ENTITY CHFN_RESTRICT         SYSTEM "login.defs.d/CHFN_RESTRICT.xml">
 <!ENTITY LOGIN_STRING          SYSTEM "login.defs.d/LOGIN_STRING.xml">
+<!-- SHADOW-CONFIG-HERE -->
 ]>
-
 <refentry id='chfn.1'>
   <!-- $Id$ -->
+  <refentryinfo>
+    <author>
+      <firstname>Julianne Frances</firstname>
+      <surname>Haugh</surname>
+      <contrib>Creation, 1990</contrib>
+    </author>
+    <author>
+      <firstname>Thomas</firstname>
+      <surname>Kłoczko</surname>
+      <email>kloczek@pld.org.pl</email>
+      <contrib>shadow-utils maintainer, 2000 - 2007</contrib>
+    </author>
+    <author>
+      <firstname>Nicolas</firstname>
+      <surname>François</surname>
+      <email>nicolas.francois@centraliens.net</email>
+      <contrib>shadow-utils maintainer, 2007 - now</contrib>
+    </author>
+  </refentryinfo>
   <refmeta>
     <refentrytitle>chfn</refentrytitle>
     <manvolnum>1</manvolnum>
     <refmiscinfo class="sectdesc">User Commands</refmiscinfo>
+    <refmiscinfo class="source">shadow-utils</refmiscinfo>
+    <refmiscinfo class="version">&SHADOW_UTILS_VERSION;</refmiscinfo>
   </refmeta>
   <refnamediv id='name'>
     <refname>chfn</refname>
@@ -50,12 +71,12 @@
   <refsynopsisdiv id='synopsis'>
     <cmdsynopsis>
       <command>chfn</command>
-      <arg choice='opt'>-f <replaceable>full_name</replaceable></arg>
+      <arg choice='opt'>
-      <arg choice='opt'>-r <replaceable>room_no</replaceable></arg>
+	<replaceable>options</replaceable>
-      <arg choice='opt'>-w <replaceable>work_ph</replaceable></arg>
+      </arg>
-      <arg choice='opt'>-h <replaceable>home_ph</replaceable></arg>
+      <arg choice='opt'>
-      <arg choice='opt'>-o <replaceable>other</replaceable></arg>
+	<replaceable>LOGIN</replaceable>
-      <arg choice='opt'><replaceable>user</replaceable></arg>
+      </arg>
     </cmdsynopsis>
   </refsynopsisdiv>
 
@@ -63,7 +84,7 @@
     <title>DESCRIPTION</title>
     <para>
       The <command>chfn</command> command changes user fullname,
-      office number, office extension, and home phone number information
+      office room number, office phone number, and home phone number information
       for a user's account. This information is typically printed by
       <citerefentry><refentrytitle>finger</refentrytitle><manvolnum>1</manvolnum>
       </citerefentry> and similar programs. A normal user may only change
@@ -84,6 +105,79 @@
       store accounting information used by other applications.
     </para>
 
+  </refsect1>
+
+  <refsect1 id='options'>
+    <title>OPTIONS</title>
+    <para>
+      The options which apply to the <command>chfn</command> command are:
+    </para>
+    <variablelist remap='IP'>
+      <varlistentry>
+	<term>
+	  <option>-f</option>, <option>--full-name</option>&nbsp;<replaceable>FULL_NAME</replaceable>
+	</term>
+	<listitem>
+	  <para>Change the user's full name.</para>
+	</listitem>
+      </varlistentry>
+      <varlistentry>
+	<term>
+	  <option>-h</option>, <option>--home-phone</option>&nbsp;<replaceable>HOME_PHONE</replaceable>
+	</term>
+	<listitem>
+	  <para>Change the user's home phone number.</para>
+	</listitem>
+      </varlistentry>
+      <varlistentry>
+	<term>
+	  <option>-o</option>, <option>--other</option>&nbsp;<replaceable>OTHER</replaceable>
+	</term>
+	<listitem>
+	  <para>
+	    Change the user's other GECOS information. This field is used to
+	    store accounting information used by other applications, and can
+	    be changed only by a superuser.
+	  </para>
+	</listitem>
+      </varlistentry>
+      <varlistentry>
+	<term>
+	  <option>-r</option>, <option>--room</option>&nbsp;<replaceable>ROOM_NUMBER</replaceable>
+	</term>
+	<listitem>
+	  <para>Change the user's room number.</para>
+	</listitem>
+      </varlistentry>
+      <varlistentry>
+	<term>
+	  <option>-R</option>, <option>--root</option>&nbsp;<replaceable>CHROOT_DIR</replaceable>
+	</term>
+	<listitem>
+	  <para>
+	    Apply changes in the <replaceable>CHROOT_DIR</replaceable>
+	    directory and use the configuration files from the
+	    <replaceable>CHROOT_DIR</replaceable> directory.
+	  </para>
+	</listitem>
+      </varlistentry>
+      <varlistentry>
+	<term>
+	  <option>-u</option>, <option>--help</option>
+	</term>
+	<listitem>
+	  <para>Display help message and exit.</para>
+	</listitem>
+      </varlistentry>
+      <varlistentry>
+	<term>
+	  <option>-w</option>, <option>--work-phone</option>&nbsp;<replaceable>WORK_PHONE</replaceable>
+	</term>
+	<listitem>
+	  <para>Change the user's office phone number.</para>
+	</listitem>
+      </varlistentry>
+    </variablelist>
     <para>
       If none of the options are selected, <command>chfn</command>
       operates in an interactive fashion, prompting the user with the

man/chgpasswd.8.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
    Copyright (c) 2006       , Tomasz Kłoczko
-   Copyright (c) 2007 - 2009, Nicolas François
+   Copyright (c) 2007 - 2011, Nicolas François
    All rights reserved.
   
    Redistribution and use in source and binary forms, with or without
@@ -34,14 +34,31 @@
 <!ENTITY MAX_MEMBERS_PER_GROUP SYSTEM "login.defs.d/MAX_MEMBERS_PER_GROUP.xml">
 <!ENTITY MD5_CRYPT_ENAB        SYSTEM "login.defs.d/MD5_CRYPT_ENAB.xml">
 <!ENTITY SHA_CRYPT_MIN_ROUNDS  SYSTEM "login.defs.d/SHA_CRYPT_MIN_ROUNDS.xml">
+<!-- SHADOW-CONFIG-HERE -->
 ]>
 
 <refentry id='chgpasswd.8'>
   <!-- $Id$ -->
+  <refentryinfo>
+    <author>
+      <firstname>Thomas</firstname>
+      <surname>Kłoczko</surname>
+      <email>kloczek@pld.org.pl</email>
+      <contrib>Creation, 2006</contrib>
+    </author>
+    <author>
+      <firstname>Nicolas</firstname>
+      <surname>François</surname>
+      <email>nicolas.francois@centraliens.net</email>
+      <contrib>shadow-utils maintainer, 2007 - now</contrib>
+    </author>
+  </refentryinfo>
   <refmeta>
     <refentrytitle>chgpasswd</refentrytitle>
     <manvolnum>8</manvolnum>
     <refmiscinfo class="sectdesc">System Management Commands</refmiscinfo>
+    <refmiscinfo class="source">shadow-utils</refmiscinfo>
+    <refmiscinfo class="version">&SHADOW_UTILS_VERSION;</refmiscinfo>
   </refmeta>
   <refnamediv id='name'>
     <refname>chgpasswd</refname>
@@ -74,7 +91,7 @@
     </para>
     <para>
       The default encryption algorithm can be defined for the system with
-      the ENCRYPT_METHOD variable of <filename>/etc/login.defs</filename>,
+      the <option>ENCRYPT_METHOD</option> variable of <filename>/etc/login.defs</filename>,
       and can be overwiten with the <option>-e</option>,
       <option>-m</option>, or <option>-c</option> options.
     </para>
@@ -125,6 +142,18 @@
 	  </para>
 	</listitem>
       </varlistentry>
+      <varlistentry>
+	<term>
+	  <option>-R</option>, <option>--root</option>&nbsp;<replaceable>CHROOT_DIR</replaceable>
+	</term>
+	<listitem>
+	  <para>
+	    Apply changes in the <replaceable>CHROOT_DIR</replaceable>
+	    directory and use the configuration files from the
+	    <replaceable>CHROOT_DIR</replaceable> directory.
+	  </para>
+	</listitem>
+      </varlistentry>
       <varlistentry condition="sha_crypt">
 	<term><option>-s</option>, <option>--sha-rounds</option></term>
 	<listitem>

man/chpasswd.8.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
    Copyright (c) 1991       , Julianne Frances Haugh
-   Copyright (c) 2007 - 2009, Nicolas François
+   Copyright (c) 2007 - 2011, Nicolas François
    All rights reserved.
   
    Redistribution and use in source and binary forms, with or without
@@ -33,14 +33,36 @@
 <!ENTITY ENCRYPT_METHOD        SYSTEM "login.defs.d/ENCRYPT_METHOD.xml">
 <!ENTITY MD5_CRYPT_ENAB        SYSTEM "login.defs.d/MD5_CRYPT_ENAB.xml">
 <!ENTITY SHA_CRYPT_MIN_ROUNDS  SYSTEM "login.defs.d/SHA_CRYPT_MIN_ROUNDS.xml">
+<!-- SHADOW-CONFIG-HERE -->
 ]>
 
 <refentry id='chpasswd.8'>
   <!-- $Id$ -->
+  <refentryinfo>
+    <author>
+      <firstname>Julianne Frances</firstname>
+      <surname>Haugh</surname>
+      <contrib>Creation, 1991</contrib>
+    </author>
+    <author>
+      <firstname>Thomas</firstname>
+      <surname>Kłoczko</surname>
+      <email>kloczek@pld.org.pl</email>
+      <contrib>shadow-utils maintainer, 2000 - 2007</contrib>
+    </author>
+    <author>
+      <firstname>Nicolas</firstname>
+      <surname>François</surname>
+      <email>nicolas.francois@centraliens.net</email>
+      <contrib>shadow-utils maintainer, 2007 - now</contrib>
+    </author>
+  </refentryinfo>
   <refmeta>
     <refentrytitle>chpasswd</refentrytitle>
     <manvolnum>8</manvolnum>
     <refmiscinfo class="sectdesc">System Management Commands</refmiscinfo>
+    <refmiscinfo class="source">shadow-utils</refmiscinfo>
+    <refmiscinfo class="version">&SHADOW_UTILS_VERSION;</refmiscinfo>
   </refmeta>
   <refnamediv id='name'>
     <refname>chpasswd</refname>
@@ -67,38 +89,37 @@
       <emphasis remap='I'>user_name</emphasis>:<emphasis
       remap='I'>password</emphasis>
     </para>
-    <refsect2 condition="no_pam">
     <para>
-      By default the supplied password must be in clear-text, and is
+      By default the passwords must be supplied in clear-text, and are
       encrypted by <command>chpasswd</command>.
       Also the password age will be updated, if present.
     </para>
-    <para>
+    <para condition="no_pam">
       The default encryption algorithm can be defined for the system with
-      the ENCRYPT_METHOD variable of <filename>/etc/login.defs</filename>,
+      the <option>ENCRYPT_METHOD</option> or
-      and can be overwiten with the <option>-e</option>,
+      <option>MD5_CRYPT_ENAB</option> variables of
-      <option>-m</option>, or <option>-c</option> options.
+      <filename>/etc/login.defs</filename>, and can be overwitten with the
+      <option>-e</option>, <option>-m</option>, or <option>-c</option>
+      options.
+    </para>
+    <para condition="pam">
+      By default, passwords are encrypted by PAM, but (even if not
+      recommended) you can select a different encryption method with the
+      <option>-e</option>, <option>-m</option>, or <option>-c</option>
+      options.
+    </para>
+    <para>
+      <phrase condition="pam">Except when PAM is used to encrypt the
+      passwords,</phrase> <command>chpasswd</command> first updates all the
+      passwords in memory, and then commits all the changes to disk if no
+      errors occured for any user.
+    </para>
+    <para condition="pam">
+      When PAM is used to encrypt the passwords (and update the passwords in
+      the system database) then if a password cannot be updated
+      <command>chpasswd</command> continues updating the passwords of the
+      next users, and will return an error code on exit.
     </para>
-      <para>
-	<command>chpasswd</command> first update the password in memory,
-	and then commit all the changes to disk if no errors occured for
-	any users.
-      </para>
-    </refsect2>
-    <refsect2 condition="pam">
-      <para>
-	The supplied passwords must be in clear-text.
-      </para>
-      <para>
-	PAM is used to update the password in the system database
-	according to the PAM chpasswd configuration.
-      </para>
-      <para>
-	When <command>chpasswd</command> fails to update a password, it
-	continues updating the passwords of the next users, and will
-	return an error code on exit.
-      </para>
-    </refsect2>
     <para>
       This command is intended to be used in a large system environment
       where many accounts are created at a single time.
@@ -111,9 +132,11 @@
       The options which apply to the <command>chpasswd</command> command
       are:
     </para>
-    <variablelist remap='IP' condition="no_pam">
+    <variablelist remap='IP'>
       <varlistentry>
-	<term><option>-c</option>, <option>--crypt-method</option></term>
+	<term>
+	  <option>-c</option>, <option>--crypt-method</option>&nbsp;<replaceable>METHOD</replaceable>
+	</term>
 	<listitem>
 	  <para>Use the specified method to encrypt the passwords.</para>
 	  <para condition="no_sha_crypt">
@@ -123,6 +146,17 @@
 	    The available methods are DES, MD5, NONE, and SHA256 or SHA512
 	    if your libc support these methods.
 	  </para>
+	  <para condition="pam">
+	    By default, PAM is used to encrypt the passwords.
+	  </para>
+	  <para condition="no_pam">
+	    By default (if none of the <option>-c</option>,
+	    <option>-m</option>, or <option>-e</option> options are
+	    specified), the encryption method is defined by the 
+	    <option>ENCRYPT_METHOD</option> or
+	    <option>MD5_CRYPT_ENAB</option> variables of
+	    <filename>/etc/login.defs</filename>.
+	  </para>
 	</listitem>
       </varlistentry>
       <varlistentry>
@@ -140,7 +174,7 @@
 	</listitem>
       </varlistentry>
     </variablelist>
-    <variablelist remap='IP' condition="no_pam">
+    <variablelist remap='IP'>
       <varlistentry>
 	<term><option>-m</option>, <option>--md5</option></term>
 	<listitem>
@@ -150,8 +184,22 @@
 	  </para>
 	</listitem>
       </varlistentry>
+      <varlistentry>
+	<term>
+	  <option>-R</option>, <option>--root</option>&nbsp;<replaceable>CHROOT_DIR</replaceable>
+	</term>
+	<listitem>
+	  <para>
+	    Apply changes in the <replaceable>CHROOT_DIR</replaceable>
+	    directory and use the configuration files from the
+	    <replaceable>CHROOT_DIR</replaceable> directory.
+	  </para>
+	</listitem>
+      </varlistentry>
       <varlistentry condition="sha_crypt">
-	<term><option>-s</option>, <option>--sha-rounds</option></term>
+	<term>
+	  <option>-s</option>, <option>--sha-rounds</option>&nbsp;<replaceable>ROUNDS</replaceable>
+	</term>
 	<listitem>
 	  <para>
 	    Use the specified number of rounds to encrypt the passwords.
@@ -170,7 +218,8 @@
 	  </para>
 	  <para>
 	    By default, the number of rounds is defined by the
-	    SHA_CRYPT_MIN_ROUNDS and SHA_CRYPT_MAX_ROUNDS variables in
+	    <option>SHA_CRYPT_MIN_ROUNDS</option> and
+	    <option>SHA_CRYPT_MAX_ROUNDS</option> variables in
 	    <filename>/etc/login.defs</filename>.
 	  </para>
 	</listitem>
@@ -184,22 +233,20 @@
       Remember to set permissions or umask to prevent readability of
       unencrypted files by other users.
     </para>
-    <para condition="no_pam">
-      You should make sure the passwords and the encryption method respect
-      the system's password policy.
-    </para>
   </refsect1>
 
-  <refsect1 id='configuration' condition="no_pam">
+  <refsect1 id='configuration'>
     <title>CONFIGURATION</title>
     <para>
       The following configuration variables in
       <filename>/etc/login.defs</filename> change the behavior of this
       tool:
     </para>
-    <variablelist>
+    <variablelist condition="no_pam">
       &ENCRYPT_METHOD;
       &MD5_CRYPT_ENAB;
+    </variablelist>
+    <variablelist>
       &SHA_CRYPT_MIN_ROUNDS; <!--documents also SHA_CRYPT_MAX_ROUNDS-->
     </variablelist>
   </refsect1>
@@ -207,19 +254,19 @@
   <refsect1 id='files'>
     <title>FILES</title>
     <variablelist>
-      <varlistentry condition="no_pam">
+      <varlistentry>
 	<term><filename>/etc/passwd</filename></term>
 	<listitem>
 	  <para>User account information.</para>
 	</listitem>
       </varlistentry>
-      <varlistentry condition="no_pam">
+      <varlistentry>
 	<term><filename>/etc/shadow</filename></term>
 	<listitem>
 	  <para>Secure user account information.</para>
 	</listitem>
       </varlistentry>
-      <varlistentry condition="no_pam">
+      <varlistentry>
 	<term><filename>/etc/login.defs</filename></term>
 	<listitem>
 	  <para>Shadow password suite configuration.</para>
@@ -243,7 +290,7 @@
       <citerefentry>
 	<refentrytitle>newusers</refentrytitle><manvolnum>8</manvolnum>
       </citerefentry>,
-      <phrase condition="no_pam">
+      <phrase>
 	<citerefentry>
 	  <refentrytitle>login.defs</refentrytitle><manvolnum>5</manvolnum>
 	</citerefentry>,

man/chsh.1.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
    Copyright (c) 1990       , Julianne Frances Haugh
-   Copyright (c) 2007 - 2008, Nicolas François
+   Copyright (c) 2007 - 2011, Nicolas François
    All rights reserved.
   
    Redistribution and use in source and binary forms, with or without
@@ -32,14 +32,36 @@
   "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
 <!ENTITY CHSH_AUTH             SYSTEM "login.defs.d/CHSH_AUTH.xml">
 <!ENTITY LOGIN_STRING          SYSTEM "login.defs.d/LOGIN_STRING.xml">
+<!-- SHADOW-CONFIG-HERE -->
 ]>
 
 <refentry id='chsh.1'>
   <!-- $Id$ -->
+  <refentryinfo>
+    <author>
+      <firstname>Julianne Frances</firstname>
+      <surname>Haugh</surname>
+      <contrib>Creation, 1990</contrib>
+    </author>
+    <author>
+      <firstname>Thomas</firstname>
+      <surname>Kłoczko</surname>
+      <email>kloczek@pld.org.pl</email>
+      <contrib>shadow-utils maintainer, 2000 - 2007</contrib>
+    </author>
+    <author>
+      <firstname>Nicolas</firstname>
+      <surname>François</surname>
+      <email>nicolas.francois@centraliens.net</email>
+      <contrib>shadow-utils maintainer, 2007 - now</contrib>
+    </author>
+  </refentryinfo>
   <refmeta>
     <refentrytitle>chsh</refentrytitle>
     <manvolnum>1</manvolnum>
     <refmiscinfo class="sectdesc">User Commands</refmiscinfo>
+    <refmiscinfo class="source">shadow-utils</refmiscinfo>
+    <refmiscinfo class="version">&SHADOW_UTILS_VERSION;</refmiscinfo>
   </refmeta>
   <refnamediv id='name'>
     <refname>chsh</refname>
@@ -63,7 +85,7 @@
     <para>
       The <command>chsh</command> command changes the user login shell.
       This determines the name of the user's initial login command. A normal
-      user may only change the login shell for her own account, the
+      user may only change the login shell for her own account; the
       superuser may change the login shell for any account.
     </para>
 
@@ -83,7 +105,19 @@
       </varlistentry>
       <varlistentry>
 	<term>
-	  <option>-s</option>, <option>--shell</option> <replaceable>SHELL</replaceable>
+	  <option>-R</option>, <option>--root</option>&nbsp;<replaceable>CHROOT_DIR</replaceable>
+	</term>
+	<listitem>
+	  <para>
+	    Apply changes in the <replaceable>CHROOT_DIR</replaceable>
+	    directory and use the configuration files from the
+	    <replaceable>CHROOT_DIR</replaceable> directory.
+	  </para>
+	</listitem>
+      </varlistentry>
+      <varlistentry>
+	<term>
+	  <option>-s</option>, <option>--shell</option>&nbsp;<replaceable>SHELL</replaceable>
 	</term>
         <listitem>                                                                                                                   
 	  <para>

man/config.xml.in

@@ -1 +1,2 @@
 <!ENTITY GROUP_NAME_MAX_LENGTH '@GROUP_NAME_MAX_LENGTH@'>
+<!ENTITY SHADOW_UTILS_VERSION '@VERSION@'>

man/cs/Makefile.am

@@ -2,24 +2,25 @@
 mandir = @mandir@/cs
 
 man_MANS = \
-	expiry.1 \
+	man1/expiry.1 \
-	faillog.5 \
+	man5/faillog.5 \
-	faillog.8 \
+	man8/faillog.8 \
-	gpasswd.1 \
+	man1/gpasswd.1 \
-	groupadd.8 \
+	man8/groupadd.8 \
-	groupdel.8 \
+	man8/groupdel.8 \
-	groupmod.8 \
+	man8/groupmod.8 \
-	groups.1 \
+	man1/groups.1 \
-	grpck.8 \
+	man8/grpck.8 \
-	gshadow.5 \
+	man5/gshadow.5 \
-	lastlog.8 \
+	man8/lastlog.8 \
-	nologin.8 \
+	man8/nologin.8 \
-	passwd.5 \
+	man5/passwd.5 \
-	shadow.5 \
+	man5/shadow.5 \
-	su.1 \
+	man1/su.1 \
-	vipw.8
+	man8/vipw.8
 
 EXTRA_DIST = $(man_MANS) \
-	id.1 \
+	man1/id.1 \
-	groupmems.8 \
+	man8/groupmems.8 \
-	logoutd.8
+	man8/logoutd.8
+