Use *at() functions to pin the directory operating in to avoid being
redirected by unprivileged users replacing parts of paths by symlinks to
privileged files.
Introduce a path_info struct with the full path and dirfd and name
information for *at() functions, since the full path is needed for link
resolution, SELinux label lookup and ACL attributes.
Use *at() functions to pin the directory operating in to avoid being
redirected by unprivileged users replacing parts of paths by symlinks to
privileged files.
Use *at() functions to pin the directory operating in to avoid being
redirected by unprivileged users replacing parts of paths by symlinks to
privileged files.
Allow the compiler to verify the format string against the supplied
arguments.
chage.c:239:51: warning: format not a string literal, format string not checked [-Wformat-nonliteral]
239 | (void) strftime (buf, sizeof buf, format, tp);
| ^~~~~~
salt.c:102:22: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
102 | static /*@observer@*/const unsigned long SHA_get_salt_rounds (/*@null@*/int *prefered_rounds);
| ^~~~~
salt.c:110:22: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
110 | static /*@observer@*/const unsigned long YESCRYPT_get_salt_cost (/*@null@*/int *prefered_cost);
| ^~~~~
subordinateio.c:160:8: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
160 | static const bool range_exists(struct commonio_db *db, const char *owner)
| ^~~~~
Compilers are free to ignore the indented hint and modern optimizations
should create good code by themself.
(As such it is for example deprecated in C++17.)
Version 1.19.1 was released in June 2014.
configure.ac:697: warning: AM_PROG_MKDIR_P: this macro is deprecated, and will soon be removed.
configure.ac:697: You should use the Autoconf-provided 'AC_PROG_MKDIR_P' macro instead,
configure.ac:697: and use '$(MKDIR_P)' instead of '$(mkdir_p)'in your Makefile.am files.
./lib/autoconf/general.m4:2434: AC_DIAGNOSE is expanded from...
aclocal.m4:780: AM_PROG_MKDIR_P is expanded from...
m4/po.m4:23: AM_PO_SUBDIRS is expanded from...
m4/gettext.m4:57: AM_GNU_GETTEXT is expanded from...
configure.ac:697: the top level
configure.ac:697: warning: The macro `AC_TRY_LINK' is obsolete.
configure.ac:697: You should run autoupdate.
./lib/autoconf/general.m4:2920: AC_TRY_LINK is expanded from...
lib/m4sugar/m4sh.m4:692: _AS_IF_ELSE is expanded from...
lib/m4sugar/m4sh.m4:699: AS_IF is expanded from...
./lib/autoconf/general.m4:2249: AC_CACHE_VAL is expanded from...
./lib/autoconf/general.m4:2270: AC_CACHE_CHECK is expanded from...
m4/gettext.m4:365: gt_INTL_MACOSX is expanded from...
m4/gettext.m4:57: AM_GNU_GETTEXT is expanded from...
configure.ac:697: the top level
configure.ac:697: warning: The macro `AC_TRY_LINK' is obsolete.
configure.ac:697: You should run autoupdate.
./lib/autoconf/general.m4:2920: AC_TRY_LINK is expanded from...
lib/m4sugar/m4sh.m4:692: _AS_IF_ELSE is expanded from...
lib/m4sugar/m4sh.m4:699: AS_IF is expanded from...
./lib/autoconf/general.m4:2249: AC_CACHE_VAL is expanded from...
./lib/autoconf/general.m4:2270: AC_CACHE_CHECK is expanded from...
m4/gettext.m4:57: AM_GNU_GETTEXT is expanded from...
configure.ac:697: the top level
configure.ac:697: warning: The macro `AC_TRY_LINK' is obsolete.
configure.ac:697: You should run autoupdate.
./lib/autoconf/general.m4:2920: AC_TRY_LINK is expanded from...
lib/m4sugar/m4sh.m4:692: _AS_IF_ELSE is expanded from...
lib/m4sugar/m4sh.m4:699: AS_IF is expanded from...
./lib/autoconf/general.m4:2249: AC_CACHE_VAL is expanded from...
./lib/autoconf/general.m4:2270: AC_CACHE_CHECK is expanded from...
m4/iconv.m4:20: AM_ICONV_LINK is expanded from...
m4/gettext.m4:57: AM_GNU_GETTEXT is expanded from...
configure.ac:697: the top level
See https://www.gnu.org/software/libtool/manual/html_node/LT_005fINIT.html
configure.ac:25: warning: The macro `AM_ENABLE_STATIC' is obsolete.
configure.ac:25: You should run autoupdate.
m4/ltoptions.m4:259: AM_ENABLE_STATIC is expanded from...
configure.ac:25: the top level
configure.ac:26: warning: The macro `AM_ENABLE_SHARED' is obsolete.
configure.ac:26: You should run autoupdate.
m4/ltoptions.m4:205: AM_ENABLE_SHARED is expanded from...
configure.ac:26: the top level
It was hard to extend the option specification string passed to
getopt_long as the third argument.
The origian code had a branch with WITH_SELINUX ifdef condition. If
one wants to add one more option char with another ifdef condition
like ENABLE_SUBIDS to the spec, the one must enumerate the specs for
all combinations of the conditions:
* WITH_SELINUX && ENABLE_SUBIDS
* WITH_SELINUX && !ENABLE_SUBIDS
* !WITH_SELINUX && ENABLE_SUBIDS
* !WITH_SELINUX && !ENABLE_SUBIDS
With this change, you can append an option char to the spec.
Signed-off-by: Masatake YAMATO <yamato@redhat.com>
On systems with Linux kernel < 3.17, getentropy() and getrandom() may
exist but return ENOSYS. Use /dev/urandom as a fallback to avoid a hard
requirement on Linux kernel version.
Fixes#512.
Signed-off-by: Xi Ruoyao <xry111@xry111.site>
In order to remove some of the FIXMEs it was necessary to change the
code and call getulong() instead of getlong().
Signed-off-by: Iker Pedrosa <ipedrosa@redhat.com>
No need to redeclare a variable with the same name and type. Just keep
the one with the biggest scope.
Signed-off-by: Iker Pedrosa <ipedrosa@redhat.com>
"egrep" is an obsolete alias for grep -E and newer greps will warn on usage
of egrep, so let's just swap it out.
Signed-off-by: Sam James <sam@gentoo.org>
Git wants to ensure that you do not read .git owned by other users.
But we fetch+build as 'build' user, and run tests as root user. Those
tests calculate git topdir using git rev-parse --show-toplevel, which
git now fails.
Setting safe.directory, seems wrong. Let's just use bash to figure
out the top dir.
Generating salt value depends on /dev/urandom. But after the
function process_root_flag changed the root directory, It does
not exist.
So, generate salt value before changeing the directory.
Fixes: #514
The markdown output for the maintainers, authors and contributors list
was wrapped in a single line and it was difficult to read. I've created
an unordered list to get a better output. On top of that I've also added
myself as a maintainer.
Signed-off-by: Iker Pedrosa <ipedrosa@redhat.com>
This used to be 16 for historical reasons but these days basically every
distro configures --with-group-name-max-length=32 to make it match the
max Linux username length, make it default.
Signed-off-by: Jami Kettunen <jami.kettunen@protonmail.com>
C++ requires extern "C" linkage specification to call functions from a C
library. Enclose the function definitions in subid.h in an extern "C"
block if compiling in C++ mode to achieve this.
Signed-off-by: Alois Wohlschlager <alois1@gmx-topmail.de>
useradd warns that a system user ID less than SYS_UID_MIN is outside the
expected range, even though that ID has been specifically selected with
the "-u" option.
In my opinion all the user ID's below SYS_UID_MAX are for the system,
thus I change the condition to take that into account.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2004911
Signed-off-by: Iker Pedrosa <ipedrosa@redhat.com>
If /etc/nsswitch.conf doesn't exist podman crashes because shadow_logfd
is NULL. In order to avoid that load the log file descriptor with the
log_get_logfd() helper function.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2038811
Signed-off-by: Iker Pedrosa <ipedrosa@redhat.com>
C89 and POSIX.1-2001 define signal(2) as returning a pointer to a
function returning 'void'. K&R C signal(2) signature is obsolete.
Use 'void' directly.
Also, instead of writing the function pointer type explicitly, use
POSIX's 'sighandler_t'.
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
Systems on which <sys/time.h> conflicted with <time.h> are obsolete.
This macro has been marked as obsolete by autoconf documentation.
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
All current compilers support C89's 'const' keyword.
Autoconf declares this macro as obsolescent.
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
As autoconf documentation says, this macro is obsolescent, as no
current systems have the bug in S_ISDIR, S_ISREG, etc..
The affected systems were Tektronix UTekV, Amdahl UTS, and
Motorola System V/88.
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
INTERACTIVE Systems Corporation Unix is no longer sold, and Sun
said (long ago) that it would drop support for it on 2006-07-23.
So this macro has been obsolete for more than a decade.
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
'mode_t' is defined by POSIX.1-2001 in <sys/types.h>.
It's unlikely to be missing.
See mode_t(3).
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
'pid_t' is defined by POSIX.1-2001 in <sys/types.h>.
It's unlikely to be missing.
See pid_t(3).
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
'off_t' is defined by POSIX.1-2001 in <sys/types.h>.
It's unlikely to be missing.
See off_t(3).
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
'uid_t' is defined by POSIX.1-2001 in <sys/types.h>.
It's unlikely to be missing.
See uid_t(3).
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
The macro HAVE_RUSEROK is not being used anywhere.
As the Linux manual page says, ruserok(3) is present on the BDSs, Solaris, and many other systems. This function appeared in 4.2BSD. So we probably can rely on its existence.
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
The macro HAVE_GETADDRINFO is not being used anywhere.
BTW, the function is defined by POSIX.1-2001 and RFC 2553, so it's likely that it is always available.
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
The macro HAVE_SIGACTION is not being used anywhere.
BTW, the function is defined by SVr4 and POSIX.1-2001, so it's likely that it is always available.
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
The macro HAVE_GETTIMEOFDAY is not being used anywhere.
BTW, the function is defined by SVr4, 4.3BSD, and POSIX.1-2001, so
it's likely that it is always available.
POSIX.1-2008 marks it as obsolete, but only because
clock_gettime(2) provides more precission. Since gettimeofday(3)
is in use by many big projects, and it has no obvious dangers,
it's likely that it will continue to exist even if it's outside of
the POSIX standard.
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
The macro HAVE_GETHOSTNAME is not being used anywhere.
BTW, the function is defined by SVr4, 4.4BSD, and POSIX.1-2001, so
it's likely that it is always available.
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
The only place where the check was used was removed in 4e1afcd66.
BTW, it was unnecessary, since strchr(3) is defined by:
POSIX.1-2001, C89, SVr4, and 4.3BSD. Enough to rely on it.
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
GNU autoconf documentation marks this macro as obsolescent, as
current systems are compatible with POSIX.
Simplify code to unconditionally include <sys/wait.h>, and don't
redefine WIFEXITSTATUS() and WIFEXITED(), since they are mandated
by POSIX.
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
POSIX.1-2001 defines 'struct dirent' in <dirent.h>. It replaces
the old 'struct direct' found in BSDs. All of the systems that I
checked (including FreeBSD, NetBSD, and OpenBSD), now provide
<dirent.h> with 'struct dirent', as mandated by POSIX.
Since autoconf first checks <dirent.h> and only if it's missing it
checks other header files, it's clear that it will always find
<dirent.h>, so let's simplify.
GNU autoconf documentation declares this macro as obsolescent, and
acknowledges that all current systems with directory libraries
have <dirent.h>:
<https://www.gnu.org/software/autoconf/manual/autoconf-2.70/html_node/Particular-Headers.html>
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
Compilers are allowed to and do optimize memset(3) calls away for
pointers not accessed in the future. Since the memzero wrappers purpose
is exactly to unconditionally override memory (e.g. for stored
passwords) do not implement via regular memset(3), but via either
memset_s(3), explicit_bzero(3) or a hand written implementation using
volatile pointers.
See https://wiki.sei.cmu.edu/confluence/display/c/MSC06-C.+Beware+of+compiler+optimizations
run_part() and run_parts() do not modify their directory, name and
action arguments.
Also include the header in the implementation to provide the prototypes.
useradd.c:2495:59: warning: cast discards ‘const’ qualifier from pointer target type [-Wcast-qual]
2495 | if (run_parts ("/etc/shadow-maint/useradd-pre.d", (char*)user_name,
| ^
useradd.c:2495:24: warning: passing argument 1 of ‘run_parts’ discards ‘const’ qualifier from pointer target type [-Wdiscarded-qualifiers]
2495 | if (run_parts ("/etc/shadow-maint/useradd-pre.d", (char*)user_name,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from useradd.c:45:
../lib/run_part.h:2:22: note: expected ‘char *’ but argument is of type ‘const char *’
2 | int run_parts (char *directory, char *name, char *action);
| ~~~~~~^~~~~~~~~
useradd.c:2496:25: warning: passing argument 3 of ‘run_parts’ discards ‘const’ qualifier from pointer target type [-Wdiscarded-qualifiers]
2496 | "useradd")) {
| ^~~~~~~~~
nss_init() does not modify its path argument, thus declare it const.
Also drop superfluous prototype.
nss.c:54:31: warning: assignment discards ‘const’ qualifier from pointer target type [-Wdiscarded-qualifiers]
54 | nsswitch_path = NSSWITCH;
| ^
Function declarations with no argument declare functions taking an
arbitrary number of arguments. Use the special type void to declare
functions taking no argument.
C89 defined isdigit as a function that tests for any decimal-digit
character, defining the decimal digits as 0 1 2 3 4 5 6 7 8 9.
I don't own a copy of C89 to check, but check in C17:
7.4.1.5
5.2.1
More specifically:
> In both the source and execution basic character sets, the value
> of each character after 0 in the above list of decimal digits
> shall be one greater than the value of the previous.
And since in ascii(7), the character after '9' is ':', it's highly
unlikely that any implementation will ever accept any
_decimal digit_ other than 0..9.
POSIX simply defers to the ISO C standard.
This is exactly what we wanted from ISDIGIT(c), so just use it.
Non-standard implementations might have been slower or considered
other characters as digits in the past, but let's assume
implementations available today conform to ISO C89.
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
It wasn't being used at all. Let's remove it.
Use isdigit(3) directly in comments that referenced it.
Also, in those comments, remove an outdated reference to the fact
that ISDIGIT_LOCALE(c) might evaluate its argument more than once,
which could be true a few commits ago, until
IN_CTYPE_DEFINITION(c) was removed. Previously, the definition
for ISDIGIT_LOCALE(c) was:
#if defined (STDC_HEADERS) || (!defined (isascii) && !defined (HAVE_ISASCII))
# define IN_CTYPE_DOMAIN(c) 1
#else
# define IN_CTYPE_DOMAIN(c) isascii(c)
#endif
#define ISDIGIT_LOCALE(c) (IN_CTYPE_DOMAIN (c) && isdigit (c))
Which could evaluate 'c' twice on pre-C89 systems (which I hope
don't exist nowadays).
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
Due to the recent removal of IN_CTYPE_DOMAIN(), the uppercase
macros that wrapped these standard calls are now defined to be
equivalent. Therefore, there's no need for the wrappers, and it
is much more readable to use the standard calls directly.
However, hold on with ISDIGIT*(), since it's not so obvious what
to do with it.
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
The recent removal of STDC_HEADERS made IN_CTYPE_DOMAIN be defined
to 1 unconditionally. Remove the now unnecessary definition, and
propagate its truthness to expressions where it was used.
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
We're in 2021. C89 is everywhere; in fact, there are many other
assumptions in the code that wouldn't probably hold on
pre-standard C environments. Let's simplify and assume that C89
is available.
The specific assumptions are that:
- <string.h>, and <stdlib.h> are available
- strchr(3), strrchr(3), and strtok(3) are available
- isalpha(3), isspace(3), isdigit(3), and isupper(3) are available
I think we can safely assume we have all of those.
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
memset(3) has been in standard C since C89. It is also in
POSIX.1-2001, in SVr4, and in 4.3BSD (see memset(3) and memset(3p)).
We can assume that this function is always available.
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
memcpy(3) has been in standard C since C89. It is also in
POSIX.1-2001, in SVr4, and in 4.3BSD (see memcpy(3) and memcpy(3p)).
We can assume that this function is always available.
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
getgroups(2) has been in POSIX since POSIX.1-2001. It is also in
in SVr4 and in 4.3BSD (see getgroups(2) and getgroups(3p)).
We can assume that this function is always available.
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
strftime(3) has been in standard C since C89. It is also in
POSIX.1-2001, and in SVr4 (see strftime(3) and strftime(3p)).
We can assume that this function is always available.
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
sleep 2s before running newxidmap - it seems we were sometimes
racing, causing newxidmap to fail.
Make sure to remove /tmp/test-xidmap, for some reason they
were sometimes still there, causing test to fail.
Fix some irregular tabbing.
Signed-off-by: Serge Hallyn <serge@hallyn.com>
PARAMETERS:
According to the C2x charter, I reordered the parameters 'size'
and 'buf' from previously existing date_to_str() definitions.
C2x charter:
> 15. Application Programming Interfaces (APIs) should be
> self-documenting when possible. In particular, the order of
> parameters in function declarations should be arranged such that
> the size of an array appears before the array. The purpose is to
> allow Variable-Length Array (VLA) notation to be used. This not
> only makes the code's purpose clearer to human readers, but also
> makes static analysis easier. Any new APIs added to the Standard
> should take this into consideration.
I used 'long' for the date parameter, as some uses of the function
need to pass a negative value meaning "never".
FUNCTION BODY:
I didn't check '#ifdef HAVE_STRFTIME', which old definitions did,
since strftime(3) is guaranteed by the C89 standard, and all of
the conversion specifiers that we use are also specified by that
standard, so we don't need any extensions at all.
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
The build was failing with duplicate symbol errors with -fno-common.
This is the default in GCC 10 and later, and explicitly enabled in some
distributions to catch problems like this. There were two causes:
- Prog and shadow_logfd were defined in a header file that was included
in multiple other files. Fix this by defining them once in
shadowlog.c, and having extern declarations in the header.
- Most of the tools (except id/nologin) also define a Prog variable,
which is not intended to alias the one in the library. Fix
this by renaming Prog in the library to shadow_progname, which also
matches the new accessor functions for it.
We were overriding this when --enable-shared was passed. We can actually
just dump the conditional logic as libtool will do the right thing for
us here anyway.
Without this patch, libsubid is installed as .0.
Signed-off-by: Sam James <sam@gentoo.org>
The SIGCHLD handler could have been ignored by parent process.
Make sure that we have default handling activated.
Signed-off-by: Tobias Stoeckmann <tobias@stoeckmann.org>
This conforms to PAM documentation and it is needed to support
ambient capabilities with PAM + libcap-2.58+.
Signed-off-by: Björn Fischer <bf@CeBiTec.Uni-Bielefeld.DE>
Rename libsubid symbols to all be prefixed with subid_.
Don't export anything but the subid_*.
Closes#443
Signed-off-by: Serge Hallyn <serge@hallyn.com>
* Change to markdown format
* Include an introduction
* Remove the commit mailing list from the contacts
* Add the IRC channel to the contacts
* Move 'S/Key' section to doc/README.skey
* Move authors and maintainers to AUTHORS.md
Signed-off-by: Iker Pedrosa <ipedrosa@redhat.com>
Add an additional NULL check condition in spw_free() and pw_free() to
avoid freeing an already empty pointer.
Signed-off-by: Iker Pedrosa <ipedrosa@redhat.com>
Rename list_subid_ranges to getsubids to provide a system binary to
check the sub*ids of a user. The intention is to provide this binary
with any distribution that includes the subid feature, so that system
administrators can check the subid ranges of a given user.
Finally, add a man page to explain the behaviour of getsubids.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1980780
Signed-off-by: Iker Pedrosa <ipedrosa@redhat.com>
Always set SIGCHLD handler to default, even if the caller of vipw has
set SIGCHLD to ignore. If SIGCHLD is ignored no zombie processes would
be created, which in turn could mean that kill is called with an already
recycled pid.
Proof of Concept:
1. Compile nochld:
--
#include <signal.h>
#include <unistd.h>
int main(void) {
char *argv[] = { "vipw", NULL };
signal(SIGCHLD, SIG_IGN);
execvp("vipw", argv);
return 1;
}
--
2. Run nochld
3. Suspend child vi, which suspends vipw too:
`kill -STOP childpid`
4. Kill vi:
`kill -9 childpid`
5. You can see with ps that childpid is no zombie but disappeared
6. Bring vipw back into foreground
`fg`
The kill call sends SIGCONT to "childpid" which in turn could have been
already recycled for another process.
This is definitely not a vulnerability. It would take super user
operations, at which point an attacker would have already elevated
permissions.
Signed-off-by: Tobias Stoeckmann <tobias@stoeckmann.org>
Change SELinux labels for files copied from the skeleton directory to
the home directory.
This could cause gnome's graphical user adding to fail without copying
the full skeleton files.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2022658
Signed-off-by: Iker Pedrosa <ipedrosa@redhat.com>
When using groupdel with a prefix, groupdel will attempt to read a
passwd file to look for any user in the group. When the file does not
exist it cores with segmentation fault.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1986111
If a line in hushlogins file, e.g. /etc/hushlogins, starts with
'\0', then current code performs an out of boundary write.
If the line lacks a newline at the end, then another character is
overridden.
With strcspn both cases are solved.
Signed-off-by: Tobias Stoeckmann <tobias@stoeckmann.org>
During shadowtcb_move() the directory is temporarily changed to be
owned by root:root with permissions 0700. After the change is done,
the ownership and permissions were supposed to be restored. The
call for chown() was there, but the chmod() call was missing. This
resulted in the broken TCB functionality. The added chmod() fixes
the issue.
Close the selabel handle to update the file_context. This means that the
file_context will be remmaped and used by selabel_lookup() to return
the appropriate context to label the home folder.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1993081
Signed-off-by: Iker Pedrosa <ipedrosa@redhat.com>
Create the home and mail folders after the SELinux user has been set for
the added user. This will allow the folders to be created with the
SELinux user label.
Signed-off-by: Iker Pedrosa <ipedrosa@redhat.com>
The buggy code was introduced nearly 5 years ago at the
commit 08fd4b69e8. The
desired behavior is that SIGKILL will be sent to the
child if it does not exit within 2 seconds after it
receives SIGTERM. However, SIGALRM is masked while
waiting for the child so it cannot wake the program
up after 2 seconds to send SIGKILL.
An example shows the buggy behavior, which exists in
Ubuntu 18.04 LTS (with login 1:4.5-1ubuntu2).
```bash
user1@localhost:~$ su user2 -c '
_term() {
echo SIGTERM received
}
trap _term TERM
while true; do
sleep 1
echo still alive
done'
Password:
still alive
Session terminated, terminating shell...Terminated
SIGTERM received
still alive
still alive
still alive
still alive
```
(SIGTERM is sent in another user1's terminal by
executing `killall su`.)
Here is the desired behavior, which shows what the
commit fixes.
```bash
user1@localhost:~$ su user2 -c '
_term() {
echo SIGTERM received
}
trap _term TERM
while true; do
sleep 1
echo still alive
done'
Password:
still alive
Session terminated, terminating shell...Terminated
SIGTERM received
still alive
still alive
...killed.
user1@localhost:~$ echo $?
255
```
In some circumstances I want the default behaviour of useradd to
not add user entries to the lastlog and faillog databases. Allowing
this options behaviour to be controlled by the config file
/etc/default/useradd.
`sgent` is only initialized in `get_group()` if `is_shadowgrp` is true.
So we should also only attempt to free it if this is actually the case.
Can otherwise lead to:
```
free() double free detected in tcache 2 (gpasswd)
```
The GitHub and Debian permanently moved to HTTPS URLs and redirect
there. The Gentoo URL does not redirect to HTTPS, but still use it to
address certain kinds of attacks. Lastly, the NetBSD URL is only
available using HTTP.
subuid_count won't get used by usr_update(), but since we're passing it
as an argument we have to make sure it's always defined. So just define
it as pre-set to 0.
Closes#402
Signed-off-by: Serge Hallyn <serge@hallyn.com>
xml2po is deprecated. We've previously replaced xml2po with
itstool in man/generate_translations.mak, but there was still
an instance of it that only is exercised for 'make dist'.
Update that one. Now 'make dist' succeeds on a ubuntu focal
or newer host where xml2po is not available.
Signed-off-by: Serge Hallyn <serge@hallyn.com>
If SHA_CRYPT_MIN_ROUNDS and SHA_CRYPT_MAX_ROUNDS are both unspecified,
use SHA_ROUNDS_DEFAULT.
Previously, the code fell through, calling shadow_random(-1, -1). This
ultimately set rounds = (unsigned long) -1, which ends up being a very
large number! This then got capped to SHA_ROUNDS_MAX later in the
function.
The new behavior matches BCRYPT_get_salt_rounds().
Bug: https://bugs.gentoo.org/808195
Fixes: https://github.com/shadow-maint/shadow/issues/393
useradd generates an empty subid range when adding a new user. This is
caused because there are two variables, one local and the other one
global, that have a very similar name and they are used indistinctly in
the code. The local variable loads the SUB_*ID_COUNT configuration from
the login.defs file, while the global variable, which holds a value of
0, is used to generate the subid range. Causing the empty subid range
problem.
I've merged the two variables in the local one and removed the global
variable. I prefer to do it this way to reduce the scope of it but I'm
open to doing it the other way round.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1990653
Signed-off-by: Iker Pedrosa <ipedrosa@redhat.com>
When the -S and -a options are used for passwd to list the status
of all passwords, there is a chance the pw_passwd field of struct
passwd will be NULL. This can be due to 'files compat' being set
for passwd in /etc/nsswitch.conf and the usage of some features
not available in the 'files' mode (e.g. a plus sign at the start
of a line).
Example:
germ161:~ # grep passwd /etc/nsswitch.conf
passwd: files compat
germ161:~ # rpm -qa shadow
shadow-4.2.1-34.20.x86_64
germ161:~ # grep passwd /etc/nsswitch.conf
passwd: files compat
germ161:~ # grep + /etc/passwd
+@nisgroup
germ161:~ # passwd -S -a > /dev/null
Segmentation fault (core dumped)
With this commit:
germ161:~ # passwd -S -a > /dev/null
passwd: malformed password data obtained for user +@nisgroup
The only way of removing a group from the supplementary list is to use
-G option, and list all groups that the user is a member of except for
the one that wants to be removed. The problem lies when there's a user
that contains both local and remote groups, and the group to be removed
is a local one. As we need to include the remote group with -G option
the command will fail.
This reverts commit 140510de9d. This way,
it would be possible to remove the remote groups from the supplementary
list.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1967641
Resolves: https://github.com/shadow-maint/shadow/issues/338
Signed-off-by: Iker Pedrosa <ipedrosa@redhat.com>
new*idmap has a dependency with libeconf since commit
c464ec5570. I'm just adding it to the
Makefile to be able to compile in distributions that include libeconf.
Signed-off-by: Iker Pedrosa <ipedrosa@redhat.com>
Since bbf4b79, we stopped shipping /etc/default/useradd, and therefore
install of shadow does not auto-create /etc/default. So when useradd
tries to save a new default, it needs to create the directory.
Closes#390.
Signed-off-by: Serge Hallyn <serge@hallyn.com>
libsubid's Makefile.am was always setting enable-shared in its LDFLAGS.
Do that only if not building static.
Closes#387
Signed-off-by: Serge Hallyn <shallyn@cisco.com>
There's a better way to do this, and I hope to clean that up,
but this fixes out of tree builds for me right now.
Closes#386
Signed-off-by: Serge Hallyn <serge@hallyn.com>
In 9eb191edc4 I included a free() that
frees the members variable, which in turn causes the comma_to_list()
function to return an array of empty elements. The array variable holds
a list of pointers that point to offsets of the members variable. When
the function succeeds freeing members variable causes the elements of
the array variable to point to an empty string.
This is causing several regressions in our internal testing environment.
So, I'm reverting the change.
Signed-off-by: Iker Pedrosa <ipedrosa@redhat.com>
Most Linux distributions, including Fedora and RHEL 8, are shipping
with libxcrypt >= 4.0.
Since that version of libxcrypt the provided family of crypt_gensalt()
functions are able to use automatic entropy drawn from secure system
ressources, like arc4random(), getentropy() or getrandom().
Anyways, the settings generated by crypt_gensalt() are always
guaranteed to works with the crypt() function.
Using crypt_gensalt() is also needed to make proper use of newer
hashing methods, like yescrypt, provided by libxcrypt.
Signed-off-by: Björn Esser <besser82@fedoraproject.org>
The functions crypt(3), crypt_gensalt(3), and their
feature test macros may be defined in there.
Signed-off-by: Björn Esser <besser82@fedoraproject.org>
In a previous commit we introduced /dev/urandom as a source to obtain
random bytes from. This may not be available on all systems, or when
operating inside of a chroot.
Almost all systems provide functions to obtain random bytes from
secure system ressources. Thus we should prefer to use these, and
fall back to /dev/urandom, if there is no such function present, as
a last resort.
Signed-off-by: Björn Esser <besser82@fedoraproject.org>
Error: RESOURCE_LEAK (CWE-772): [#def1]
shadow-4.8.1/lib/commonio.c:320: alloc_fn: Storage is returned from allocation function "fopen_set_perms".
shadow-4.8.1/lib/commonio.c:320: var_assign: Assigning: "bkfp" = storage returned from "fopen_set_perms(backup, "w", &sb)".
shadow-4.8.1/lib/commonio.c:329: noescape: Resource "bkfp" is not freed or pointed-to in "putc".
shadow-4.8.1/lib/commonio.c:334: noescape: Resource "bkfp" is not freed or pointed-to in "fflush".
shadow-4.8.1/lib/commonio.c:339: noescape: Resource "bkfp" is not freed or pointed-to in "fileno".
shadow-4.8.1/lib/commonio.c:342: leaked_storage: Variable "bkfp" going out of scope leaks the storage it points to.
340| || (fclose (bkfp) != 0)) {
341| /* FIXME: unlink the backup file? */
342|-> return -1;
343| }
344|
Error: RESOURCE_LEAK (CWE-772): [#def2]
shadow-4.8.1/libmisc/addgrps.c:69: alloc_fn: Storage is returned from allocation function "malloc".
shadow-4.8.1/libmisc/addgrps.c:69: var_assign: Assigning: "grouplist" = storage returned from "malloc(i * 4UL)".
shadow-4.8.1/libmisc/addgrps.c:73: noescape: Resource "grouplist" is not freed or pointed-to in "getgroups". [Note: The source code implementation of the function has been overridden by a builtin model.]
shadow-4.8.1/libmisc/addgrps.c:126: leaked_storage: Variable "grouplist" going out of scope leaks the storage it points to.
124| }
125|
126|-> return 0;
127| }
128| #else /* HAVE_SETGROUPS && !USE_PAM */
Error: RESOURCE_LEAK (CWE-772): [#def3]
shadow-4.8.1/libmisc/chowntty.c:62: alloc_fn: Storage is returned from allocation function "getgr_nam_gid".
shadow-4.8.1/libmisc/chowntty.c:62: var_assign: Assigning: "grent" = storage returned from "getgr_nam_gid(getdef_str("TTYGROUP"))".
shadow-4.8.1/libmisc/chowntty.c:98: leaked_storage: Variable "grent" going out of scope leaks the storage it points to.
96| */
97| #endif
98|-> }
99|
Error: RESOURCE_LEAK (CWE-772): [#def4]
shadow-4.8.1/libmisc/copydir.c:742: open_fn: Returning handle opened by "open". [Note: The source code implementation of the function has been overridden by a user model.]
shadow-4.8.1/libmisc/copydir.c:742: var_assign: Assigning: "ifd" = handle returned from "open(src, 0)".
shadow-4.8.1/libmisc/copydir.c:748: leaked_handle: Handle variable "ifd" going out of scope leaks the handle.
746| #ifdef WITH_SELINUX
747| if (set_selinux_file_context (dst, NULL) != 0) {
748|-> return -1;
749| }
750| #endif /* WITH_SELINUX */
Error: RESOURCE_LEAK (CWE-772): [#def5]
shadow-4.8.1/libmisc/copydir.c:751: open_fn: Returning handle opened by "open". [Note: The source code implementation of the function has been overridden by a user model.]
shadow-4.8.1/libmisc/copydir.c:751: var_assign: Assigning: "ofd" = handle returned from "open(dst, 577, statp->st_mode & 0xfffU)".
shadow-4.8.1/libmisc/copydir.c:752: noescape: Resource "ofd" is not freed or pointed-to in "fchown_if_needed".
shadow-4.8.1/libmisc/copydir.c:775: leaked_handle: Handle variable "ofd" going out of scope leaks the handle.
773| ) {
774| (void) close (ifd);
775|-> return -1;
776| }
777|
Error: RESOURCE_LEAK (CWE-772): [#def7]
shadow-4.8.1/libmisc/idmapping.c:188: alloc_fn: Storage is returned from allocation function "xmalloc".
shadow-4.8.1/libmisc/idmapping.c:188: var_assign: Assigning: "buf" = storage returned from "xmalloc(bufsize)".
shadow-4.8.1/libmisc/idmapping.c:188: var_assign: Assigning: "pos" = "buf".
shadow-4.8.1/libmisc/idmapping.c:213: noescape: Resource "buf" is not freed or pointed-to in "write".
shadow-4.8.1/libmisc/idmapping.c:219: leaked_storage: Variable "pos" going out of scope leaks the storage it points to.
shadow-4.8.1/libmisc/idmapping.c:219: leaked_storage: Variable "buf" going out of scope leaks the storage it points to.
217| }
218| close(fd);
219|-> }
Error: RESOURCE_LEAK (CWE-772): [#def8]
shadow-4.8.1/libmisc/list.c:211: alloc_fn: Storage is returned from allocation function "xstrdup".
shadow-4.8.1/libmisc/list.c:211: var_assign: Assigning: "members" = storage returned from "xstrdup(comma)".
shadow-4.8.1/libmisc/list.c:217: var_assign: Assigning: "cp" = "members".
shadow-4.8.1/libmisc/list.c:218: noescape: Resource "cp" is not freed or pointed-to in "strchr".
shadow-4.8.1/libmisc/list.c:244: leaked_storage: Variable "cp" going out of scope leaks the storage it points to.
shadow-4.8.1/libmisc/list.c:244: leaked_storage: Variable "members" going out of scope leaks the storage it points to.
242| if ('\0' == *members) {
243| *array = (char *) 0;
244|-> return array;
245| }
246|
Error: RESOURCE_LEAK (CWE-772): [#def11]
shadow-4.8.1/libmisc/myname.c:61: alloc_fn: Storage is returned from allocation function "xgetpwnam".
shadow-4.8.1/libmisc/myname.c:61: var_assign: Assigning: "pw" = storage returned from "xgetpwnam(cp)".
shadow-4.8.1/libmisc/myname.c:67: leaked_storage: Variable "pw" going out of scope leaks the storage it points to.
65| }
66|
67|-> return xgetpwuid (ruid);
68| }
69|
Error: RESOURCE_LEAK (CWE-772): [#def12]
shadow-4.8.1/libmisc/user_busy.c:260: alloc_fn: Storage is returned from allocation function "opendir".
shadow-4.8.1/libmisc/user_busy.c:260: var_assign: Assigning: "task_dir" = storage returned from "opendir(task_path)".
shadow-4.8.1/libmisc/user_busy.c:262: noescape: Resource "task_dir" is not freed or pointed-to in "readdir".
shadow-4.8.1/libmisc/user_busy.c:278: leaked_storage: Variable "task_dir" going out of scope leaks the storage it points to.
276| _("%s: user %s is currently used by process %d\n"),
277| Prog, name, pid);
278|-> return 1;
279| }
280| }
Error: RESOURCE_LEAK (CWE-772): [#def20]
shadow-4.8.1/src/newgrp.c:162: alloc_fn: Storage is returned from allocation function "xgetspnam".
shadow-4.8.1/src/newgrp.c:162: var_assign: Assigning: "spwd" = storage returned from "xgetspnam(pwd->pw_name)".
shadow-4.8.1/src/newgrp.c:234: leaked_storage: Variable "spwd" going out of scope leaks the storage it points to.
232| }
233|
234|-> return;
235|
236| failure:
Error: RESOURCE_LEAK (CWE-772): [#def21]
shadow-4.8.1/src/passwd.c:530: alloc_fn: Storage is returned from allocation function "xstrdup".
shadow-4.8.1/src/passwd.c:530: var_assign: Assigning: "cp" = storage returned from "xstrdup(crypt_passwd)".
shadow-4.8.1/src/passwd.c:551: noescape: Resource "cp" is not freed or pointed-to in "strlen".
shadow-4.8.1/src/passwd.c:554: noescape: Resource "cp" is not freed or pointed-to in "strcat". [Note: The source code implementation of the function has been overridden by a builtin model.]
shadow-4.8.1/src/passwd.c:555: overwrite_var: Overwriting "cp" in "cp = newpw" leaks the storage that "cp" points to.
553| strcpy (newpw, "!");
554| strcat (newpw, cp);
555|-> cp = newpw;
556| }
557| return cp;
Using the random() function to obtain pseudo-random bytes
for generating salt strings is considered to be dangerous.
See CWE-327.
We really should use a more reliable source for obtaining
pseudo-random bytes like /dev/urandom.
Fixes#376.
Signed-off-by: Björn Esser <besser82@fedoraproject.org>
In the previous commit we refactored the functions converting the
rounds number into a string for use with the crypt() function, to
not require any static buffer anymore.
Add some clarifying comments about how the minimum required buffer
length is computed inside of these functions.
Signed-off-by: Björn Esser <besser82@fedoraproject.org>
* Move all pre-processor defines to the top of the file.
* Unify the gensalt() function to be useable for all supported
hash methods.
* Drop the gensalt_{b,yes}crypt() functions in favor of the
previous change.
* Refactor the functions converting the rounds number into
a string for use with the crypt() function, to not require
any static buffer anymore.
* Clarify the comment about how crypt_make_salt() chooses the used
hash method from the settings in the login.defs file.
* Use memset() to fill static buffers with zero before using them.
* Use a fixed amount of 16 random base64-chars for the
sha{256,512}crypt hash methods, which is effectively still less
than the recommendation from NIST (>= 128 bits), but the maximum
those methods can effectively use (approx. 90 bits).
* Rename ROUNDS_{MIN,MAX} to SHA_ROUNDS_{MIN,MAX}.
* Bugfixes in the logic of setting rounds in BCRYPT_salt_rounds().
* Likewise for YESCRYPT_salt_cost().
* Fix formatting and white-space errors.
Signed-off-by: Björn Esser <besser82@fedoraproject.org>
The corresponding functions for the other hash methods all take
a pointer to an integer value as the only paramater, so this
particular function should do so as well.
Signed-off-by: Björn Esser <besser82@fedoraproject.org>
Error: RESOURCE_LEAK (CWE-772): [#def28]
shadow-4.8.1/src/useradd.c:1905: open_fn: Returning handle opened by "open". [Note: The source code implementation of the function has been overridden by a user model.]
shadow-4.8.1/src/useradd.c:1905: var_assign: Assigning: "fd" = handle returned from "open("/var/log/faillog", 2)".
shadow-4.8.1/src/useradd.c:1906: noescape: Resource "fd" is not freed or pointed-to in "lseek".
shadow-4.8.1/src/useradd.c:1917: leaked_handle: Handle variable "fd" going out of scope leaks the handle.
1915| /* continue */
1916| }
1917|-> }
1918|
1919| static void lastlog_reset (uid_t uid)
Error: RESOURCE_LEAK (CWE-772): [#def29]
shadow-4.8.1/src/useradd.c:1938: open_fn: Returning handle opened by "open". [Note: The source code implementation of the function has been overridden by a user model.]
shadow-4.8.1/src/useradd.c:1938: var_assign: Assigning: "fd" = handle returned from "open("/var/log/lastlog", 2)".
shadow-4.8.1/src/useradd.c:1939: noescape: Resource "fd" is not freed or pointed-to in "lseek".
shadow-4.8.1/src/useradd.c:1950: leaked_handle: Handle variable "fd" going out of scope leaks the handle.
1948| /* continue */
1949| }
1950|-> }
1951|
1952| static void tallylog_reset (const char *user_name)
Error: RESOURCE_LEAK (CWE-772): [#def30]
shadow-4.8.1/src/useradd.c:2109: alloc_fn: Storage is returned from allocation function "strdup".
shadow-4.8.1/src/useradd.c:2109: var_assign: Assigning: "bhome" = storage returned from "strdup(prefix_user_home)".
shadow-4.8.1/src/useradd.c:2131: noescape: Resource "bhome" is not freed or pointed-to in "strtok".
shadow-4.8.1/src/useradd.c:2207: leaked_storage: Variable "bhome" going out of scope leaks the storage it points to.
2205| }
2206| #endif
2207|-> }
2208| }
2209|
Following the discussion https://github.com/shadow-maint/shadow/pull/345
I have changed the documentation to clarify the behaviour of subid
delegation when any subid source except files is configured.
Error: RESOURCE_LEAK (CWE-772): [#def31]
shadow-4.8.1/src/usermod.c:813: alloc_fn: Storage is returned from allocation function "__gr_dup".
shadow-4.8.1/src/usermod.c:813: var_assign: Assigning: "ngrp" = storage returned from "__gr_dup(grp)".
shadow-4.8.1/src/usermod.c:892: leaked_storage: Variable "ngrp" going out of scope leaks the storage it points to.
890| }
891| }
892|-> }
893|
894| #ifdef SHADOWGRP
Error: RESOURCE_LEAK (CWE-772): [#def32]
shadow-4.8.1/src/usermod.c:933: alloc_fn: Storage is returned from allocation function "__sgr_dup".
shadow-4.8.1/src/usermod.c:933: var_assign: Assigning: "nsgrp" = storage returned from "__sgr_dup(sgrp)".
shadow-4.8.1/src/usermod.c:1031: leaked_storage: Variable "nsgrp" going out of scope leaks the storage it points to.
1029| }
1030| }
1031|-> }
1032| #endif /* SHADOWGRP */
1033|
Error: RESOURCE_LEAK (CWE-772): [#def34]
shadow-4.8.1/src/usermod.c:1161: alloc_fn: Storage is returned from allocation function "getgr_nam_gid".
shadow-4.8.1/src/usermod.c:1161: var_assign: Assigning: "grp" = storage returned from "getgr_nam_gid(optarg)".
shadow-4.8.1/src/usermod.c:1495: leaked_storage: Variable "grp" going out of scope leaks the storage it points to.
1493| }
1494| #endif /* ENABLE_SUBIDS */
1495|-> }
1496|
1497| /*
Error: RESOURCE_LEAK (CWE-772): [#def35]
shadow-4.8.1/src/usermod.c:1991: open_fn: Returning handle opened by "open". [Note: The source code implementation of the function has been overridden by a user model.]
shadow-4.8.1/src/usermod.c:1991: var_assign: Assigning: "fd" = handle returned from "open("/var/log/lastlog", 2)".
shadow-4.8.1/src/usermod.c:2000: noescape: Resource "fd" is not freed or pointed-to in "lseek".
shadow-4.8.1/src/usermod.c:2000: noescape: Resource "fd" is not freed or pointed-to in "read". [Note: The source code implementation of the function has been overridden by a builtin model.]
shadow-4.8.1/src/usermod.c:2003: noescape: Resource "fd" is not freed or pointed-to in "lseek".
shadow-4.8.1/src/usermod.c:2032: leaked_handle: Handle variable "fd" going out of scope leaks the handle.
2030| }
2031| }
2032|-> }
2033|
2034| /*
Error: RESOURCE_LEAK (CWE-772): [#def36]
shadow-4.8.1/src/usermod.c:2052: open_fn: Returning handle opened by "open". [Note: The source code implementation of the function has been overridden by a user model.]
shadow-4.8.1/src/usermod.c:2052: var_assign: Assigning: "fd" = handle returned from "open("/var/log/faillog", 2)".
shadow-4.8.1/src/usermod.c:2061: noescape: Resource "fd" is not freed or pointed-to in "lseek".
shadow-4.8.1/src/usermod.c:2061: noescape: Resource "fd" is not freed or pointed-to in "read". [Note: The source code implementation of the function has been overridden by a builtin model.]
shadow-4.8.1/src/usermod.c:2064: noescape: Resource "fd" is not freed or pointed-to in "lseek".
shadow-4.8.1/src/usermod.c:2092: leaked_handle: Handle variable "fd" going out of scope leaks the handle.
2090| }
2091| }
2092|-> }
2093|
2094| #ifndef NO_MOVE_MAILBOX
Clarify that the subid delegation can only come from one source.
Moreover, add an example of what might happen if the subid source is NSS
and useradd is executed.
Related: https://github.com/shadow-maint/shadow/issues/331
Closes#331
1. drop 'has_any_range' nss method as it is not useful
2. do not try to create a subid range in newusers when using nss for
subids, since that's not possible.
Signed-off-by: Serge Hallyn <serge@hallyn.com>
(cherry picked from commit 88a434adbdcf4a8640793fd58bcd2ba77598349d)
Following alexey-tikhonov's suggestion.
Since we've dropped the 'owner' field in the data returned for
get_subid_ranges, we can just return a single allocated array of
simple structs. This means we can return a ** instead of ***, and
we can get rid of the subid_free_ranges() helper, since the caller
can just free() the returned data.
Signed-off-by: Serge Hallyn <serge@hallyn.com>
The rest of the run isn't likely to get much better, is it?
Thanks to Alexey for pointing this out.
Signed-off-by: Serge Hallyn <serge@hallyn.com>
Cc: Alexey Tikhonov <atikhono@redhat.com>
Closes: 339
struct subordinate_range is pretty closely tied to the existing
subid code and /etc/subuid format, so it includes an owner. Dropping
that or even renaming it is more painful than I'd first thought.
So introduce a 'struct subid_range' which is only the start and
count, leaving 'struct subordinate_range' as the owner, start and
count.
Signed-off-by: Serge Hallyn <serge@hallyn.com>
Closes#325
Add a new subid_init() function which can be used to specify the
stream on which error messages should be printed. (If you want to
get fancy you can redirect that to memory :) If subid_init() is
not called, use stderr. If NULL is passed, then /dev/null will
be used.
This patch also fixes up the 'Prog', which previously had to be
defined by any program linking against libsubid. Now, by default
in libsubid it will show (subid). Once subid_init() is called,
it will use the first variable passed to subid_init().
Signed-off-by: Serge Hallyn <serge@hallyn.com>
When uid 0 maps host uid 0 into the child userns newer kernels require
CAP_SETFCAP be retained as this allows the caller to create fscaps that
are valid in the ancestor userns. This was a security issue (in very
rare circumstances). So whenever host uid 0 is mapped, retain
CAP_SETFCAP if the caller had it.
Userspace won't need to set CAP_SETFCAP on newuidmap as this is really
only a scenario that real root should be doing which always has
CAP_SETFCAP. And if they don't then they are in a locked-down userns.
(LXC sometimes maps host uid 0 during chown operations in a helper
userns but will not rely on newuidmap for that. But we don't want to
risk regressing callers that want to rely on this behavior.)
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Include the new HMAC_CRYPTO_ALGO key that is needed by pam_timestamp to
select the algorithm that is going to be used to calculate the message
authentication code.
pam_timestamp is currently using an embedded algorithm to calculate the
HMAC message, but the idea is to improve this behaviour by relying on
openssl's implementation. On top of that, the ability to change the
algorithm with a simple configuration change allows to simplify the
process of removing unsecure algorithms.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1947294
Once opened, keep the selabel database open for further lookups.
Register an exit handler to close the database.
Signed-off-by: Christian Göttsche <cgzones@googlemail.com>
Acked-by: James Carter <jwcart2@gmail.com>
Search the SELinux selabel database for the file type to be created.
Not specifying the file mode can cause an incorrect file context to be
returned.
Also prepare contexts in commonio_close() for the generic database
filename, not with the backup suffix appended, to ensure the desired
file context after the final rename.
Closes: #322
Signed-off-by: Christian Göttsche <cgzones@googlemail.com>
Acked-by: James Carter <jwcart2@gmail.com>
matchpathcon(3) is deprecated in favor of selabel_lookup(3).
Signed-off-by: Christian Göttsche <cgzones@googlemail.com>
Acked-by: James Carter <jwcart2@gmail.com>
Return 0 on setfscreatecon(3) failure, like set_selinux_file_context().
Signed-off-by: Christian Göttsche <cgzones@googlemail.com>
Acked-by: James Carter <jwcart2@gmail.com>
These retrieved contexts are just passed to libselinux functions and not
printed or otherwise made available to the outside, so a context
translation to human readable MCS/MLS labels is not needed.
(see man:setrans.conf(5))
The typedef security_context_t is deprecated, see
9eb9c93275
Signed-off-by: Christian Göttsche <cgzones@googlemail.com>
Acked-by: James Carter <jwcart2@gmail.com>
This retrieved context is just passed to libselinux functions and not
printed or otherwise made available to the outside, so a context
translation to human readable MCS/MLS labels is not needed.
(see man:setrans.conf(5))
The typedef security_context_t is deprecated, see
9eb9c93275
Signed-off-by: Christian Göttsche <cgzones@googlemail.com>
Acked-by: James Carter <jwcart2@gmail.com>
Currently, supplying a relative path via the --prefix flag to the
useradd command triggers a bug in the creation of home directories. The
code seems to unintentionally prepend a leading "/" to all paths,
quietly transforming a relative prefixed home path into an absolute
path. This can be seen in the following strace logs from running
"useradd --create-home --prefix tmp/root squat":
```
access("tmp/root//home/squat", F_OK) = -1 ENOENT (No such file or directory)
access("/mp", F_OK) = 0
access("/mp/root", F_OK) = 0
access("/mp/root/home", F_OK) = 0
access("/mp/root/home/squat", F_OK) = -1 ENOENT (No such file or directory)
mkdir("/mp/root/home/squat", 000) = 0
chown("/mp/root/home/squat", 0, 0) = 0
chmod("/mp/root/home/squat", 0755) = 0
chown("tmp/root//home/squat", 1000, 1000) = -1 ENOENT (No such file or directory)
chmod("tmp/root//home/squat", 0700) = -1 ENOENT (No such file or directory)
```
Note that the relative path is correctly probed in the beginning and it
is only during the recursive creation that the path is turned into an
absolute path. This invocation results in the creation of a "/mp"
hierarchy in the root of the filesystem.
Similar problems occur when using `--prefix ./tmp/root`.
This commit fixes the handling of relative paths by not assuming that
the given path is anchored with a "/".
Signed-off-by: Lucas Servén Marín <lserven@gmail.com>
Otherwise our su -p uses bash if that is what root was
configured to use, and then fails to read /root/ for
.bash_profile. This caused an unexpected error message
in /tmp/err, failing the test.
Signed-off-by: Serge Hallyn <serge@hallyn.com>
Closes#154
When starting any operation to do with subuid delegation, check
nsswitch for a module to use. If none is specified, then use
the traditional /etc/subuid and /etc/subgid files.
Currently only one module is supported, and there is no fallback
to the files on errors. Several possibilities could be considered:
1. in case of connection error, fall back to files
2. in case of unknown user, also fall back to files
etc...
When non-files nss module is used, functions to edit the range
are not supported. It may make sense to support it, but it also
may make sense to require another tool to be used.
libsubordinateio also uses the nss_ helpers. This is how for instance
lxc could easily be converted to supporting nsswitch.
Add a set of test cases, including a dummy libsubid_zzz module. This
hardcodes values such that:
'ubuntu' gets 200000 - 300000
'user1' gets 100000 - 165536
'error' emulates an nss module error
'unknown' emulates a user unknown to the nss module
'conn' emulates a connection error ot the nss module
Changes to libsubid:
Change the list_owner_ranges api: return a count instead of making the array
null terminated.
This is a breaking change, so bump the libsubid abi major number.
Rename free_subuid_range and free_subgid_range to ungrant_subuid_range,
because otherwise it's confusing with free_subid_ranges which frees
memory.
Run libsubid tests in jenkins
Switch argument order in find_subid_owners
Move the db locking into subordinateio.c
Signed-off-by: Serge Hallyn <serge@hallyn.com>
Issue #297 reported seeing
*** Warning: Linking the shared library libsubid.la against the
*** static library ../libmisc/libmisc.a is not portable!
which commit b5fb1b38ee was supposed
to fix. But a few commits later it's back. So try to fix it
in the way the bug reporter suggested. This broke builds some
other ways, namely a few missing library specifications, so add
those.
Signed-off-by: Serge Hallyn <serge@hallyn.com>
* login & su: Treat an empty passwd field as invalid
Otherwise it's treated like the “require no password” clause while it probably
should be treated like a normal su that can't validate anyway.
A similar change should be done for USE_PAM.
* su & login: Introduce PREVENT_NO_AUTH
man/usermod.8.xml: specify what happens when the current home directory
doesn't exist if using -d and -m options. Moreover, specify what happens
when the group ownership is changed and the uid's don't match in -u and
-g options.
man/shadow.5.xml: indicate the exact time and timezone for the dates.
Moreover, clarify that when the password expires the user won't be able
to login.
man/chage.1.xml: Indicate that -d option with a value of 0 forces the
user to change his password. Besides, set an example on how to use -E
option. Finally, add a general note to clarify that chage only takes
charge of local users and another note to indicate that it doesn't check
inconsistencies between shadow and passwd files.
covscan issue:
Error: RESOURCE_LEAK (CWE-772): [#def39] [important]
src/useradd.c:728: alloc_fn: Storage is returned from allocation function "get_local_group".
src/useradd.c:728: var_assign: Assigning: "grp" = storage returned from "get_local_group(list)".
src/useradd.c:728: overwrite_var: Overwriting "grp" in "grp = get_local_group(list)" leaks the storage that "grp" points to.
726| * GID values, otherwise the string is looked up as is.
727| */
728|-> grp = get_local_group (list);
729|
730| /*
Existing help output advertises --force as a long opt.
-f, --force delete group even if it is the primary group of a user
But errors when the long opt is used.
groupdel: unrecognized option '--force'
Signed-off-by: Jamin W. Collins <jamin.collins@gmail.com>
The login.defs is shared between more upstream projects (util-linux,
etc.). We need to improve compatibility between the projects do not
report valid, but foreign items.
Addresses: https://github.com/shadow-maint/shadow/issues/276
Signed-off-by: Karel Zak <kzak@redhat.com>
Some of these tests seem wrong. The assume that
su -- -c command
should work, whereas -- should mean pass all remaining arguments
along to the command.
Add some new tests based on examples in Issue 253
Signed-off-by: Serge Hallyn <shallyn@cisco.com>
It's now possible to run commands as other users without shell
interpolation by using "--exec":
Read /etc/shadow as root without specifying user:
```
su --exec /bin/cat -- /etc/shadow
```
Or specify user:
```
su --exec /bin/cat root -- /etc/shadow
```
Mechanical rename distinguishing this variable from intended changes
supporting executing commands without using an interpretive shell
(i.e. no '/bin/sh -c').
In preparation for supporting --exec I was testing the robustness
of "--" handling and it became apparent that things are currently
a bit broken in `su`.
Since "--" is currently of limited utility, as the subsequent
words are simply passed to the shell after "-c","command_string",
it seems to have gone unnoticed for ages.
However, with --exec, it's expected that "--" would be an almost
required separator with every such usage, considering the
following flags must be passed verbatim to execve() and will
likely begin with hyphens looking indistinguishable from any
other flags in lieu of shell interpolation to worry about.
For some practical context of the existing situation, this
invocation doesn't work today:
```
$ su --command ls -- flags for shell
No passwd entry for user 'flags'
$
```
This should just run ls as root with "flags","for","shell"
forwarded to the shell after "-c","ls".
The "--" should block "flags" from being treated as the user.
That particular issue isn't a getopt one per-se, it's arguably
just a bug in su.c's implementation.
It *seemed* like an easy fix for this would be to add a check if
argv[optind-1] were "--" before treating argv[optind] as USER.
But testing that fix revealed getopt was rearranging things when
encountering "--", the "--" would always separate the handled
opts from the unhandled ones. USER would become shifted to
*after* "--" even when it occurred before it!
If we change the command to specify the user, it works as-is:
```
$ su --command ls root -- flags for shell
Password:
testfile
$
```
But what's rather surprising is how that works; the argv winds up:
"su","--command","ls","--","root","flags","for","shell"
with optind pointing at "root".
That arrangement of argv is indistinguishable from omitting the
user and having "root","flags","for","shell" as the stuff after
"--".
This makes it non-trivial to fix the bug of omitting user
treating the first word after "--" as the user, which one could
argue is a potentially serious security bug if you omit the user,
expect the command to run as root, and the first word after "--"
is a valid user, and what follows that something valid and
potentially destructive not only running in unintended form but
as whatever user happened to be the first word after "--".
So, it seems like something important to fix, and getopt seems to
be getting in the way of fixing it properly without being more
trouble than replacing getopt.
In disbelief of what I was seeing getopt doing with argv here, I
took a glance at the getopt source and found the following:
```
/* The special ARGV-element '--' means premature end of options.
Skip it like a null option,
then exchange with previous non-options as if it were an option,
then skip everything else like a non-option. */
if (d->optind != argc && !strcmp (argv[d->optind], "--"))
```
I basically never use getopt personally because ages ago it
annoyed me with its terrible API for what little it brought to
the table, and this brings it to a whole new level of awful.
This is a stability fix, not a security fix, because the affected -o
option can only be used by root and it takes a modified passwd file.
If a gecos field for a user has BUFSIZ characters without commas and an
equals sign (i.e. a huge slop/extra field) and chfn is called with -o,
then a buffer overflow occurs.
It is not possible to trigger this with shadow tools. Therefore, the
passwd file must be modified manually.
I have fixed this unlikely case the easiest and cleanest way possible.
Since chfn bails out if more than 80 characters excluding commas are
supposed to be written into gecos field, we can stop processing early on
if -o argument is too long.
Signed-off-by: Tobias Stoeckmann <tobias@stoeckmann.org>
This is merely a stability fix, not a security fix.
As the root user, it is possible to set time values which later on
result in signed integer overflows.
For this to work, an sgetspent implementation must be used which
supports long values (glibc on amd64 only parses 32 bit, not 64).
Either use musl or simply call configure with following environment
variable:
$ ac_cv_func_sgetspent=no ./configure
Also it is recommended to compile with -fsanitize=undefined or
-ftrapv to see these issues easily.
Examples to trigger issues when calling "chage -l user":
$ chage -d 9223372036854775807 user
$ chage -d 106751991167300 user
$ chage -M 9999 user
$ chage -d 90000000000000 user
$ chage -I 90000000000000 user
$ chage -M 9999 user
$ chage -E 9223372036854775807 user
While at it, I fixed casting issues which could lead to signed integer
overflows on systems which still have a 32 bit time_t.
Signed-off-by: Tobias Stoeckmann <tobias@stoeckmann.org>
Closes#154
Currently this has three functions: one which returns the
list of subuid ranges for a user, one returning the subgids,
and one which frees the ranges lists.
I might be mistaken about what -disable-man means; some of
the code suggests it means just don't re-generate them, but
not totally ignore them. But that doesn't seem to really work,
so let's just ignore man/ when -disable-man.
Remove --disable-shared. I'm not sure why it was there, but it stems
from long, long ago, and I suspect it comes from some ancient
toolchain bug.
Create a tests/run_some, a shorter version of run_all. I'll
slowly add tests to this as I verify they work, then I can
work on fixing the once which don't.
Also, don't touch man/ if not -enable-man.
Changelog:
Apr 22: change the subid list api as recomended by Dan Walsh.
Apr 23: implement get_subid_owner
Apr 24: implement range add/release
Apr 25: finish tests and rebase
May 10: make @owner const
Signed-off-by: Serge Hallyn <serge@hallyn.com>
Now that travis supports more architectures let's make sure we test on
all of them and that we enable Coverity too.
Signed-off-by: Christian Brauner <christian@brauner.io>
Do not include <sys/prctl.h> we don't have <sys/capability.h>, we don't
need prctl in that case anyway.
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
According to crypt(5), MD5 and DES should not be used for new
hashes. Also the default number of SHA rounds chosen by libc is orders
of magnitude too low for modern hardware. Let's warn the users about
weak choices.
Signed-off-by: Topi Miettinen <toiwoton@gmail.com>
Explanation: clarify the useradd -d parameter as it does create directory HOME_DIR if it doesn't exit.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1677005
Changelog: [serge] minor tweak to the text
The useradd program should be consistent with userdel and usermod and use the
MAIL_SPOOL_DIR variable as the default spool, if it is defined. Otherwise,
don't create a new mailbox, because it won't be cleaned up by userdel when run
with the -r flag.
In case there is a regular user with a process running on a system
with uid falling into a namespaced uid range of another user.
The user with the colliding namespaced uid range will not be
allowed to be deleted without forcing the action with -f.
The user_busy() is adjusted to check whether the suspected process
is really a namespaced process in a different namespace.
updated Dutch translation for shadow version 4.8 (pot file from 2019-12-01).
I updated the translation for Debian
and on request of the Debian package maintainer Bálint Réczey I am creating this pull request
Although it is a good idea to check for an inadvertent typo
in the shell name it is possible that the shell might not be present
on the system yet when the user is added.
This option can be used to set a separate mode for useradd(8) and
newusers(8) to create the home directories with.
If this option is not set, the current behavior of using UMASK
or the default umask is preserved.
There are many distributions that set UMASK to 077 by default just
to create home directories not readable by others and use things like
/etc/profile, bashrc or sudo configuration files to set a less
restrictive
umask. This has always resulted in bug reports because it is hard
to follow as users tend to change files like bashrc and are not about
setting the umask to counteract the umask set in /etc/login.defs.
A recent change in sudo has also resulted in many bug reports about
this. sudo now tries to respect the umask set by pam modules and on
systems where pam does not set a umask, the login.defs UMASK value is
used.
This commit adds a from= field to the end of the useradd log entry.
Casting user_name to tallylog_reset to silence a compiler warning.
Changelog: Fixing tabs
Changelog: Changing function prototype to const char* to match user_name declaration.
This option can be used to set a separate mode for useradd(8) and
newusers(8) to create the home directories with.
If this option is not set, the current behavior of using UMASK
or the default umask is preserved.
There are many distributions that set UMASK to 077 by default just
to create home directories not readable by others and use things like
/etc/profile, bashrc or sudo configuration files to set a less
restrictive
umask. This has always resulted in bug reports because it is hard
to follow as users tend to change files like bashrc and are not about
setting the umask to counteract the umask set in /etc/login.defs.
A recent change in sudo has also resulted in many bug reports about
this. sudo now tries to respect the umask set by pam modules and on
systems where pam does not set a umask, the login.defs UMASK value is
used.
If SSH_ORIGINAL_COMMAND is set, it will be added to the syslog entry.
Closes#123.
Changelog: (SEH squashed commit): Fixing indentation
Changelog: (SEH) break up long line
`make` runs each line in a shell and bails out on error,
however, the shell is not started with `-e`, so commands in
`for` loops can fail without the error actually causing
`make` to bail out with a failure status.
For instance, the following make snippet will end
successfully, printing 'SUCCESS', despite the first `chmod`
failing:
all:
touch a b
for i in a-missing-file a b; do \
chmod 666 $$i; \
done
@echo SUCCESS
To prevent wrong paths in install scripts from remaining
unnoticed, let's activate `set -e` in the `for` loop
subshells.
Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
Suggesting mode 2770 is dangerous because it makes the binary writeable
by all members of the owning group which is supposed to be normal
end-users. Suggest 2710 instead as is usual for s[ug]id binaries,
allowing execution but neither reading nor writing.
Signed-off-by: Michael Weiser <michael.weiser@gmx.de>
Here's a sad story:
* 70971457 is merged into shadow, allowing newgidmap/newuidmap to be
installed with file caps rather than setuid.
* https://bugs.archlinux.org/task/63248 is filed to take advantage of
this.
* The arch maintainer of the 'shadow' package notices that this doesn't
work, and submits a pull request to fix this in shadow.
* edf7547ad5 is merged, fixing the post install hooks.
The problem here is that distros have been building shadow with PAM for
O(years), but the install hooks have silently failed due to the
combination of the directory mismatch (suidubins vs suidsbins) and later
success with setuid'ing newgidmap/newuidmap.
With the install hooks fixed, those of us (Arch[1] and Gentoo[2] so far)
who never built shadow explicitly with --enable-account-tools-setuid are
now getting setuid account tools, and don't have PAM configuration
suitable for use with setuid account management tools.
It's entirely unclear to me why you'd want this, but I assume there's
some reason out there for it existing. Regardless, setuid binaries are
dangerous and shouldn't be enabled by default without good reason.
[1] https://bugs.archlinux.org/task/64836
[2] https://bugs.gentoo.org/702252
This reverts commit e293aa9cfc.
See https://github.com/shadow-maint/shadow/issues/196
Some distros still care about `/bin` vs `/usr/bin`. This commit makes
it so all binaries are always installed to `/bin`/`/sbin`. The only way to
restore the previous behaviour of installing some binaries to
`/usr/bin`/`/usr/sbin` is to revert the patch.
Synchronize how passwd(5) and shadow(5) describe the password field.
Reorder the descriptions more logically.
Signed-off-by: Topi Miettinen <toiwoton@gmail.com>
Closes#185
If vipw is suspended (e.g. via control-Z) and then resumed, it often gets
immediately suspended. This is easier to reproduce on a multi-core system.
root@buster:~# /usr/sbin/vipw
[1]+ Stopped /usr/sbin/vipw
root@buster:~# fg
/usr/sbin/vipw
[1]+ Stopped /usr/sbin/vipw
root@buster:~# fg
[vipw resumes on the second fg]
The problem is that vipw forks a child process and calls waitpid() with the
WUNTRACED flag. When the child process (running the editor) is suspended, the
parent sends itself SIGSTOP to suspend the main vipw process. However, because
the main vipw is in the same process group as the editor which received the ^Z,
the kernel already sent the main vipw SIGTSTP.
If the main vipw receives SIGTSTP before the child, it will be suspended and
then, once resumed, will proceed to suspend itself again.
To fix this, run the child process in its own process group as the foreground
process group. That way, control-Z will only affect the child process and the
parent can use the existing logic to suspend the parent.
Using hard-coded access vector ids is deprecated and can lead to issues with custom SELinux policies.
Switch to `selinux_check_access()`.
Also use the libselinux log callback and log if available to audit.
This makes it easier for users to catch SELinux denials.
Drop legacy shortcut logic for passwd, which avoided a SELinux check if uid 0 changes a password of a user which username equals the current SELinux user identifier.
Nowadays usernames rarely match SELinux user identifiers and the benefit of skipping a SELinux check is negligible.
Signed-off-by: Christian Göttsche <cgzones@googlemail.com>
With this, it is possible for Linux distributors to store their
supplied default configuration files somewhere below /usr, while
/etc only contains the changes made by the user. The new option
--enable-vendordir defines where the shadow suite should additional
look for login.defs if this file is not in /etc.
libeconf is a key/value configuration file reading library, which
handles the split of configuration files in different locations
and merges them transparently for the application.
suidubins should be suidusbins, since these binaries are installed
${prefix}/sbin. This historically hasn't broken the build because
chmod of newgidmap/newuidmap succeeds, causing make to think the command
succeeded. Configuring shadow with --with-fcaps removes these final two
entries and exposes the chmod failure to make.
Some distros don't care about the split between /bin, /sbin, /usr/bin,
and /usr/sbin, so let them easily stuff binaries wherever they want.
This also fixes a problem during installation where-in a loop of 'chmod
4755' calls will mostly fail. However, because the last two succeed
(newuidmap/newgidmap), make considers the command to be a success.
Somewhat not-amusingly, configuring shadow with --with-fcaps will cause
installation to fail because the final chmod call is now a failing one.
Fix formatting of login.defs comments. Variables are preceeded by "#"
without space, comments are preceeded by "# ". It makes the file machine
parseable again.
Signed-off-by: Stanislav Brabec <sbrabec@suse.cz>
A configure error occurs when /bin/sh -> dash:
checking for is_selinux_enabled in -lselinux... yes
checking for semanage_connect in -lsemanage... yes
configure: 16322: test: yesyes: unexpected operator
Use "=" instead of "==" since dash doesn't support this operator.
Signed-off-by: Yi Zhao <yi.zhao@windriver.com>
new switch added to useradd command, --btrfs-subvolume-home. When
specified *and* the filesystem is detected as btrfs, it will create a
subvolume for user's home instead of a plain directory. This is done via
`btrfs subvolume` command. Specifying the new switch while trying to
create home on non-btrfs will result in an error.
userdel -r will handle and remove this subvolume transparently via
`btrfs subvolume` command. Previosuly this failed as you can't rmdir a
subvolume.
usermod, when moving user's home across devices, will detect if the home
is a subvolume and issue an error messages instead of copying it. Moving
user's home (as subvolume) on same btrfs works transparently.
As the lockfiles have PID in the name, there can be no conflict
in the name with other process, so there is no point in using
O_EXCL and it only can fail if there is a stale lockfile from
previous execution that crashed for some reason.
The implementation of prefix option dropped the use of lckpwdf().
However that is incorrect as other tools manipulating the shadow passwords
such as PAM use lckpwdf() and do not know anything about the
shadow's own locking mechanism.
This reverts the implementation to use lckpwdf() if prefix option
is not used.
From <https://github.com/shadow-maint/shadow/pull/71>:
```
The third field in the /etc/shadow file (sp_lstchg) contains the date of
the last password change expressed as the number of days since Jan 1, 1970.
As this is a relative time, creating a user today will result in:
username:17238:0:99999:7:::
whilst creating the same user tomorrow will result in:
username:17239:0:99999:7:::
This has an impact for the Reproducible Builds[0] project where we aim to
be independent of as many elements the build environment as possible,
including the current date.
This patch changes the behaviour to use the SOURCE_DATE_EPOCH[1]
environment variable (instead of Jan 1, 1970) if valid.
```
This updated PR adds some missing calls to gettime (). This was originally
filed by Johannes Schauer in Debian as #917773 [2].
[0] https://reproducible-builds.org/
[1] https://reproducible-builds.org/specs/source-date-epoch/
[2] https://bugs.debian.org/917773
- translated by Jean-Philippe MENGUAL
- proofread by the debian-l10n-french mailing list contributors
Signed-off-by: Alban VIDAL <alban.vidal@zordhak.fr>
In case the home directory is not a real home directory
(owned by the user) but things like / or /var or similar,
it is unsafe to change ownership of home directory content.
The test checks whether the home directory is owned by the
user him/herself, if not no ownership modification of contents
is performed.
As the large uids are usually provided by remote user identity and
authentication service, which also provide user login tracking,
there is no need to create a huge sparse file for them on every local
machine.
fixup! login.defs: Add LASTLOG_UID_MAX variable to limit lastlog to small uids.
simplify the condition for setting the euid of the process. Now it is
always set when we are running as root, the issue was introduced with
the commit 52c081b02c
Changelog: 2018-11-24 - seh - enforce that euid only gets set to ruid if
it currently == 0 (i.e. really was setuid-*root*).
Closes: https://github.com/genuinetools/img/issues/191
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
Signed-off-by: Serge Hallyn <shallyn@cisco.com>
Commit 1ecca8439d ("new[ug]idmap: not require CAP_SYS_ADMIN in the parent userNS")
does contain a wrong commit message, is lacking an explanation of the
issue, misses some simplifications and hardening features. This commit
tries to rectify this.
In (crazy) environment where all capabilities are dropped from the
capability bounding set apart from CAP_SET{G,U}ID setuid- and
fscaps-based new{g,u}idmap binaries behave differently when writing
complex mappings for an unprivileged user:
1. newuidmap is setuid
unshare -U sleep infinity &
newuidmap $? 0 100000 65536
First file_ns_capable(file, ns, CAP_SYS_ADMIN) is hit. This calls into
cap_capable() and hits the loop
for (;;) {
/* Do we have the necessary capabilities? */
if (ns == cred->user_ns)
return cap_raised(cred->cap_effective, cap) ? 0 : -EPERM;
/*
* If we're already at a lower level than we're looking for,
* we're done searching.
*/
if (ns->level <= cred->user_ns->level)
return -EPERM;
/*
* The owner of the user namespace in the parent of the
* user namespace has all caps.
*/
if ((ns->parent == cred->user_ns) && uid_eq(ns->owner, cred->euid))
return 0;
/*
* If you have a capability in a parent user ns, then you have
* it over all children user namespaces as well.
*/
ns = ns->parent;
}
The first check fails and falls through to the end of the loop and
retrieves the parent user namespace and checks whether CAP_SYS_ADMIN is
available there which isn't.
2. newuidmap has CAP_SETUID as fscaps set
unshare -U sleep infinity &
newuidmap $? 0 100000 65536
The first file_ns_capable() check for CAP_SYS_ADMIN is passed since the
euid has not been changed:
if ((ns->parent == cred->user_ns) && uid_eq(ns->owner, cred->euid))
return 0;
Now new_idmap_permitted() is hit which calls ns_capable(ns->parent,
CAP_SET{G,U}ID). This check passes since CAP_SET{G,U}ID is available in
the parent user namespace.
Now file_ns_capable(file, ns->parent, CAP_SETUID) is hit and the
cap_capable() loop (see above) is entered again. This passes
if (ns == cred->user_ns)
return cap_raised(cred->cap_effective, cap) ? 0 : -EPERM;
since CAP_SET{G,U}ID is available in the parent user namespace. Now the
mapping can be written.
There is no need for this descrepancy between setuid and fscaps based
new{g,u}idmap binaries. The solution is to do a
seteuid() back to the unprivileged uid and PR_SET_KEEPCAPS to keep
CAP_SET{G,U}ID. The seteuid() will cause the
file_ns_capable(file, ns, CAP_SYS_ADMIN) check to pass and the
PR_SET_KEEPCAPS for CAP_SET{G,U}ID will cause the CAP_SET{G,U}ID to
pass.
Fixes: 1ecca8439d ("new[ug]idmap: not require CAP_SYS_ADMIN in the parent userNS")
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
do not install newuidmap/newgidmap as suid binaries. Running these
tools with the same euid as the owner of the user namespace to
configure requires only CAP_SETUID and CAP_SETGID instead of requiring
CAP_SYS_ADMIN when it is installed as a suid binary.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
if the euid!=owner of the userns, the kernel returns EPERM when trying
to write the uidmap and there is no CAP_SYS_ADMIN in the parent
namespace.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
Some distributions, notably Fedora, have the following order of nsswitch
modules by default:
passwd: sss files
group: sss files
The advantage of serving local users through SSSD is that the nss_sss
module has a fast mmapped-cache that speeds up NSS lookups compared to
accessing the disk an opening the files on each NSS request.
Traditionally, this has been done with the help of nscd, but using nscd
in parallel with sssd is cumbersome, as both SSSD and nscd use their own
independent caching, so using nscd in setups where sssd is also serving
users from some remote domain (LDAP, AD, ...) can result in a bit of
unpredictability.
More details about why Fedora chose to use sss before files can be found
on e.g.:
https://fedoraproject.org//wiki/Changes/SSSDCacheForLocalUsers
or:
https://docs.pagure.org/SSSD.sssd/design_pages/files_provider.html
Now, even though sssd watches the passwd and group files with the help
of inotify, there can still be a small window where someone requests a
user or a group, finds that it doesn't exist, adds the entry and checks
again. Without some support in shadow-utils that would explicitly drop
the sssd caches, the inotify watch can fire a little late, so a
combination of commands like this:
getent passwd user || useradd user; getent passwd user
can result in the second getent passwd not finding the newly added user
as the racy behaviour might still return the cached negative hit from
the first getent passwd.
This patch more or less copies the already existing support that
shadow-utils had for dropping nscd caches, except using the "sss_cache"
tool that sssd ships.
Sometimes getlogin() may fail, e.g., in a chroot() environment or due to NSS
misconfiguration. Loggin UID allows for investigation and troubleshooting in
such situation.
When "su -l" is used the behaviour is described as similar to
a direct login. However login.c is doing a setup_env(pw) and then a
pam_getenvlist() in this scenario. But su.c is doing it the other
way around. Which means that the value of PATH from /etc/environment
is overriden. I think this is a bug because:
The man-page claims that "-l": "provides an environment similar
to what the user would expect had the user logged in directly."
And login.c is using the PATH from /etc/environment.
This will fix:
https://bugs.launchpad.net/ubuntu/+source/shadow/+bug/984390
This allows shadow-utils to build on systems like Adélie, which have no
<utmp.h> header or `struct utmp`. We use a <utmpx.h>-based daemon,
utmps[1], which uses `struct utmpx` only.
Tested both `login` and `logoutd` with utmps and both work correctly.
[1]: http://skarnet.org/software/utmps/
Equivalent of `mkdir -p`. It will create all parent directories.
Example: `useradd -d /home2/testu1 -m testu1`
Based on https://github.com/shadow-maint/shadow/pull/2 by Thorsten Kukuk
and Thorsten Behrens which was Code from pwdutils 3.2.2 with slight adaptations.
Adapted to so it applies to current code.
Otherwise our spw_next() will cause us to skip an entry.
Ideally we'd be able to do an swp_rewind(1), but I don't
see a helper for this.
Closes#60
Signed-off-by: Serge Hallyn <shallyn@cisco.com>
Translate remaining strings to Norwegian bokmål (nb). Also, cure previous translation of excessive anglicism and apply a more consistent use of actual Norwegian syntax.
This is necessary to match the kernel-side policy of "self-mapping in a
user namespace is fine, but you cannot drop groups" -- a policy that was
created in order to stop user namespaces from allowing trivial privilege
escalation by dropping supplementary groups that were "blacklisted" from
certain paths.
This is the simplest fix for the underlying issue, and effectively makes
it so that unless a user has a valid mapping set in /etc/subgid (which
only administrators can modify) -- and they are currently trying to use
that mapping -- then /proc/$pid/setgroups will be set to deny. This
workaround is only partial, because ideally it should be possible to set
an "allow_setgroups" or "deny_setgroups" flag in /etc/subgid to allow
administrators to further restrict newgidmap(1).
We also don't write anything in the "allow" case because "allow" is the
default, and users may have already written "deny" even if they
technically are allowed to use setgroups. And we don't write anything if
the setgroups policy is already "deny".
Ref: https://bugs.launchpad.net/ubuntu/+source/shadow/+bug/1729357
Fixes: CVE-2018-7169
Reported-by: Craig Furman <craig.furman89@gmail.com>
Signed-off-by: Aleksa Sarai <asarai@suse.de>
In case a system uses remote identity server (LDAP) the group lookup
can be very slow. We avoid it when we already know the user has the
group membership.
Do not reset the pid_child to 0 if the child process is still
running. This else-condition can be reached with pid being -1,
therefore explicitly test this condition.
This is a regression fix for CVE-2017-2616. If su receives a
signal like SIGTERM, it is not propagated to the child.
Reported-by: Radu Duta <raduduta@gmail.com>
Signed-off-by: Tobias Stoeckmann <tobias@stoeckmann.org>
The third field in the /etc/shadow file (sp_lstchg) contains the date of
the last password change expressed as the number of days since Jan 1, 1970.
As this is a relative time, creating a user today will result in:
username:17238:0:99999:7:::
whilst creating the same user tomorrow will result in:
username:17239:0:99999:7:::
This has an impact for the Reproducible Builds[0] project where we aim to
be independent of as many elements the build environment as possible,
including the current date.
This patch changes the behaviour to use the SOURCE_DATE_EPOCH[1]
environment variable (instead of Jan 1, 1970) if valid.
[0] https://reproducible-builds.org/
[1] https://reproducible-builds.org/specs/source-date-epoch/
Signed-off-by: Chris Lamb <lamby@debian.org>
If ptr->line == NULL for an entry, the first cycle will exit,
but the second one will happily write past entries buffer.
We actually do not want to exit the first cycle prematurely
on ptr->line == NULL.
Signed-off-by: Tomas Mraz <tmraz@fedoraproject.org>
If su is compiled with PAM support, it is possible for any local user
to send SIGKILL to other processes with root privileges. There are
only two conditions. First, the user must be able to perform su with
a successful login. This does NOT have to be the root user, even using
su with the same id is enough, e.g. "su $(whoami)". Second, SIGKILL
can only be sent to processes which were executed after the su process.
It is not possible to send SIGKILL to processes which were already
running. I consider this as a security vulnerability, because I was
able to write a proof of concept which unlocked a screen saver of
another user this way.
This reverts the behavior of "useradd --root" to using the settings
from login.defs in the target root directory, not the root of the
executed useradd command.
Without this patch, PAM enabled builds crash when encountering an
invalid key in login.defs or key overrides because of array overflows
To reproduce, simply
useradd -K Windows=broken
Signed-off-by: Bernhard Rosenkränzer <bero@lindev.ch>
Signed-off-by: Serge Hallyn <serge@hallyn.com>
Previously, the allocation was optimized for an outdated
deployment style (that of /etc/group alongside nss_db). The issue
here is that this results in extremely poor performance when using
SSSD, Winbind or nss_ldap.
There were actually two serious bugs here that have been addressed:
1) Running getgrent() loops won't work in most SSSD or Winbind
environments, as full group enumeration is disabled by default.
This could easily result in auto-allocating a group that was
already in use. (This might result in a security issue as well, if
the shared GID is a privileged group).
2) For system groups, the loop was always iterating through the
complete SYS_GID_MIN->SYS_GID_MAX range. On SSSD and Winbind, this
means hundreds of round-trips to LDAP (unless the GIDs were
specifically configured to be ignored by the SSSD or winbindd).
To a user with a slow connection to their LDAP server, this would
appear as if groupadd -r was hung. (Though it would eventually
complete).
This patch changes the algorithm to be more favorable for LDAP
environments, at the expense of some performance when using nss_db.
Given that the DB is a local service, this should have a negligible
effect from a user's perspective.
With the new algorithm, we simply first iterate through all entries
in the local database with gr_next(), recording the IDs that are in
use. We then start from the highest presumed-available entry and
call getgrgid() to see if it is available. We continue this until
we come to the first unused GID. We then select that and return it.
If we make it through all the remaining IDs without finding a free
one, we start over from the beginning of the range and try to find
room in one of the gaps in the range.
The patch was originally written by Stephen Gallagher and applied
identically also to the user allocation by Tomáš Mráz.
Signed-off-by: Serge Hallyn <serge@hallyn.com>
The useradd application resets the user data in /var/log/faillog, if it
exists and a new user is created.
pam_tally2 is used in many distributions.
Check for /var/log/tallylog and reset the user there.
Patch was written by Josef Moellers <jmoellers@suse.de>.
https://bugzilla.suse.com/show_bug.cgi?id=980486
Otherwise we get build warnings like:
sgroupio.c:255:6: warning: implicit declaration of function 'getdef_bool' [-Wimplicit-function-declaration]
shadowio.c:131:6: warning: implicit declaration of function 'getdef_bool' [-Wimplicit-function-declaration]
Enable the automake feature to produce silent output by default.
When compiling code, we now see things like:
$ make
CC addgrps.o
CC age.o
CC audit_help.o
...
This can be disabled via configure's --disable-silent-rules or
by passing V=1 to make.
Custom output (like in the man subdirs) don't (yet) respect this
feature. More work will be needed to clean those up.
Since xz is fairly common nowadays, and is typically smaller/faster than
bzip2 for people to decompress, switch shadow over too. We also merge
the two init locations into configure.ac to match newer autotools style.
The min automake version is bumped to 1.11 too since that's when xz was
released.
The autoconf/automake guys want AC_INIT to be passed the details of the
package directly rather than going through AM_INIT_AUTOMAKE. Update them
both to use the newer style.
This also allows us to pass in contact details for the project.
We set the minimum autoconf version to 2.64 as that's the first one to
support passing the homepage URL in to AC_INIT. That's a pretty old
release by now, so it shouldn't be a problem.
These assignments were pasted as is into the Makefile and
ended up as part of a rule. (Usually the .PRECIOUS rule
which is why the build system never attempted to execute it
as commands, hiding the problem.)
Signed-off-by: Wolfgang Bumiller <wry.git@bumiller.com>
Reported-by: Rahel A <ra00177@surrey.ac.uk>
Should have been: '[...] but only checkS [...]'.
So there was a missing 's'. Architectures isn't the right word either.
I decided to write the whole sentence new.
Some of the supplied tools use functions which are not signal-safe.
Most of the times it's exit() vs. _exit().
In other times it's how the standard output or standard error is
handled. FILE-related functions shall be avoided, therefore I replaced
them with write().
Also there is no need to call closelog(). At worst, it allows to
trigger a deadlock by issuing different signal types at bad timings.
But as these fixes are about race conditions, expect bad timings in
general for these bugs to be triggered. :)
Catch up with Automake's [1], which was part of v1.6b, cut 2002-07-28
[2]. Avoids:
$ autoreconf -v -f --install
...
libmisc/Makefile.am:4: warning: 'INCLUDES' is the old name for 'AM_CPPFLAGS' (or '*_CPPFLAGS')
...
src/Makefile.am:10: warning: 'INCLUDES' is the old name for 'AM_CPPFLAGS' (or '*_CPPFLAGS')
...
Consolidating with the earlier AM_CPPFLAGS avoids:
$ autoreconf -v -f --install
src/Makefile.am:72: warning: AM_CPPFLAGS multiply defined in condition TRUE ...
src/Makefile.am:10: ... 'AM_CPPFLAGS' previously defined here
autoreconf-2.69: Leaving directory `.'
[1]: http://git.savannah.gnu.org/cgit/automake.git/commit/?id=1415d22f6203206bc393fc4ea233123ba579222d
Summary: automake.in (generate_makefile): Suggest using AM_CPPFLAGS instead of INCLUDES
Date: 2002-07-09
[2]: http://git.savannah.gnu.org/cgit/automake.git/tag/?id=Release-1-6b
This functionality is useful because there is now a feature
of Linux-PAM's pam_lastlog module to block expired users (users
which did not login recently enough) from login. This commit
complements it so the sysadmin is able to unblock such expired user.
Signed-off-by: Tomáš Mráz <tmraz@fedoraproject.org>
We intend to not create subuids for system users. However we are
checking for command line flags after we check whether -r flag
was set, so it was never found to be true. Fix that.
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
- Use an allocation of 65536 uids and gids to allow for POSIX-compliant
user owned namespaces.
- Don't allocate a uid/gid map to system users.
Unfortunately checking for --system isn't quite enough as some
distribution wrappers always call useradd without --system and take care
of choosing a uid and gid themselves, so also check whether the
requested uid/gid is in the user range.
This is taken from a patch I wrote for Ubuntu a couple years ago and
which somehow didn't make it upstream.
Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>
The current implementation of subuid/subgid support in usermod requires the
user to be a local user present in /etc/passwd. There doesn't seem to be a
good reason for this; subuids should work equally well for users whose
records are in other NSS databases.
Bug-Ubuntu: https://bugs.launchpad.net/bugs/1475749
Author: Steve Langasek <steve.langasek@ubuntu.com>
Acked-by: Serge Hallyn <serge.hallyn@ubuntu.com>
The functions __gr_dup and __pw_dup do not explicitly zero the
memory which hold the passwords after free. The gr_free and pw_free
functions do this explicitly.
To guarantee same behaviour, it's possible to call these *_free
functions directly from __*_dup, because the memory is initialized
with zeros at the beginning. Calling free(NULL) has no negative
effect and can be considered safe these days.
This is helpful when using configuration management tools such as
Puppet, where you are managing the groups in a central location and you
don't need this safeguard.
Signed-off-by: "Jesse W. Hathaway" <jesse@mbuki-mvuki.org>
Acked-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Currently the error is just:
newuidmap: Target [pid] is owned by a different user
With this patch it will be like:
newuidmap: Target [pid] is owned by a different user: uid:0 pw_uid:0 st_uid:0, gid:0 pw_gid:0 st_gid:99
Why is this useful? Well, in my case...
The grsecurity kernel-hardening patch includes an option to make parts
of /proc unreadable, such as /proc/pid/ dirs for processes not owned by
the current uid. This comes with an option to make /proc/pid/
directories readable by a specific gid; sysadmins and the like are then
put into that group so they can see a full 'ps'.
This means that the check in new[ug]idmap fails, as in the above quoted
error - /proc/[targetpid] is owned by root, but the group is 99 so that
users in group 99 can see the process.
Some Googling finds dozens of people hitting this problem, but not
*knowing* that they have hit this problem, because the errors and
circumstances are non-obvious.
Some graceful way of handling this and not failing, will be next ;) But
in the meantime it'd be nice to have new[ug]idmap emit a more useful
error, so that it's easier to troubleshoot.
Thanks!
Signed-off-by: Hank Leininger <hlein@korelogic.com>
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
passwd, shadow, group, gshadow etc. can be managed via nss -
e.g. system default accounts can be specified using nss_altfiles,
rather than in /etc/. Thus despite having default accounts, these
files can be missing on disk and thus should be opened with O_CREATE
whenever they are attempted to be opened in O_RDWR modes.
When compiled with PAM certain settings are not used, however they are
still defined in the stock login.defs file. Thus every command reports
them as "unknown setting contact administrator".
Alternative would be to parse stock login.defs and comment out/remove
settings that are not applied, when compiled with PAM.
Prevent chmod failure message from displaying if the failure
was due to the backup file not existing.
If there is no backup file present and if no changes have been
made, then this error would always appear since the backup
file isn't created in this situation.
Signed-off-by: Duncan Eastoe <deastoe@Brocade.com>
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
When referring to USERGROUPS_ENAB, the German mentions /etc/default/useradd
when it should be /etc/login.defs (like the original English does).
Reported-by: Stefan Kiesler <heavymetal@gmx.de>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Change suggested by Nicolas François as performance optimization.
Performance penalty would be really noticeable when usernames are
stored in remote databases (ldap).
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Until now only exact username specification in /etc/sub[ug]id file allowed the
mapping. This prevented normal use for those users who use multiple usernames
with the same UID, as it rejected mapping even though it was allowed for
another username with the same UID.
This patch initially retains the old behaviour, for performance's sake. In the
first pass, new[ug]idmap only searches for exact username match.
If that yields no valid results, it continues into another loop, which does UID
resolution and comparison. If either definition (numeric UID mapping
specification or mapping specification for another username with the same UID as
current username) is found, it is used.
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
We're losing the svn history (which we could probably keep if we tried
hard enough) but don't consider that worthwhile.
Note these tests are destructive, so run them only in a throwaway
environment like a chroot, container, or vm.
The tests/run.all script should be the one which launches all the tests.
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
This built-in check is simpler than the previous method and, most
importantly, works when cross-compiling.
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Currently shadow fails to build from source and is flagged as
out-of-date. This is due to a usage of PATH_MAX, which is not defined
on GNU/Hurd. The attached patch solves this problem by allocating a
fixed number of 32 bytes for the string proc_dir_name in files
src/procuidmap.c and src/procgidmap.c. (In fact only 18 bytes are
needed)
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Users may otherwise be confused and think that because the kernel
does not restrict uid mappings to the root user (within his
current uid mappings), newuidmap will ignore /etc/subuid for the
root user. It will not.
Reported-by: Philippe Grégoire <gregoirep@hotmail.com>
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
The number of ranges should be the ceiling of the number of arguments divided
by three.
Without this fix newuidmap and newgidmap always report and error and fail,
which is very much not what we want.
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
* man/login.defs.d/SUB_GID_COUNT.xml: Document newusers behavior
when the user already have subordinate group IDs.
* man/login.defs.d/SUB_UID_COUNT.xml: Likewise.
* man/login.defs.d/SUB_GID_COUNT.xml: Fix typo (MAX<->MIN).
* man/login.defs.d/SUB_UID_COUNT.xml: Likewise.
* libmisc/find_new_sub_gids.c: Remove dead code.
find_new_sub_gids() is always called with *range_count set to 0.
It's more difficult to keep the subordinate GIDs and UIDs
synchronized, than for the user's UID/GId because the count of
subordinate IDs may differ.
* libmisc/find_new_sub_uids.c: Likewise.
* lib/subordinateio.h, lib/subordinateio.c: Remove APIs that are
no more needed: is_sub_uid_range_free(), is_sub_gid_range_free(),
is_range_free().
* src/su.c: Terminate the child (if needed) before closing the PAM
session. This is probably more correct, and avoid reporting
termination from signals possibly sent by PAM modules (e.g. former
versions of pam_systemd). Debian#670132
* src/su.c: When a SIGTSTP is caught, reset caught to 0. There is
no need to kill the child in such case after su is resumed. This
remove the "Session terminated, terminating shell...
...terminated." messages in such case.
* libmisc/idmapping.h: Document what the upper and lower fields
are in struct map_range.
* man/newgidmap.1.xml: Document when the gid, gidlower and count
argument are.
* man/newuidmap.1.xml: Likewise for uid, uidlower and count.
* libmisc/salt.c (shadow_random): Use long instead of size_t.
Compatibility with size_t is easier to check since it's used for
smaller numbers (salt size).
* man/login.defs.d/SUB_GID_COUNT.xml: Document that the behavior
of useradd and newusers depends on the existence of /etc/subgid.
* man/login.defs.d/SUB_UID_COUNT.xml: Likewise for /etc/subuid.
* src/useradd.c: Change message in case of find_new_sub_uids /
find_new_sub_gids failure. This complements the messages already
provided by these APIs.
* configure.in: Add configure options --enable-subordinate-ids /
--disable-subordinate-ids. Enabled by default.
* lib/prototypes.h: Include <config.h> before using its macros.
* lib/commonio.h, lib/commonio.c: Define commonio_append only when
ENABLE_SUBIDS is defined.
* lib/prototypes.h, libmisc/find_new_sub_gids.c,
libmisc/find_new_sub_uids.c: Likewise.
* lib/subordinateio.h, lib/subordinateio.c: Likewise.
* libmisc/user_busy.c: Only check if subordinate IDs are in use if
ENABLE_SUBIDS is defined.
* src/Makefile.am: Create newgidmap and newuidmap only if
ENABLE_SUBIDS is defined.
* src/newusers.c: Check for ENABLE_SUBIDS to enable support for
subordinate IDs.
* src/useradd.c: Likewise.
* src/userdel.c: Likewise.
* src/usermod.c: Likewise.
* man/Makefile.am: Install man1/newgidmap.1, man1/newuidmap.1,
man5/subgid.5, and man5/subuid.5 only if ENABLE_SUBIDS is defined.
* man/fr/Makefile.am: Install man1/newgidmap.1, man1/newuidmap.1,
man5/subgid.5, and man5/subuid.5 (not translated yet).
* man/generate_mans.mak: Add xsltproc conditionals
subids/no_subids.
* man/login.defs.d/SUB_GID_COUNT.xml: Add dependency on subids
condition.
* man/login.defs.d/SUB_UID_COUNT.xml: Likewise.
* man/usermod.8.xml: Document options for subordinate IDs and
reference subgid(5) / subuid(5) depending on the subids condition.
rlogin support is old school code, so newer C libraries drop support for
ruserok (like uClibc, optionally). But shadow doesn't build with that,
so have it check for ruserok to optionally enable rlogin.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* lib/groupmem.c (__gr_dup): Support libc which define other
fields in struct group.
* lib/pwmem.c: Likewise for struct passwd.
* lib/shadowmem.c: Likewise for struct spwd.
* lib/sgroupio.c: Apply same logic, even if this structure is
defined internally.
In find_new_sub_{u,g}ids, check for min, count and max values.
In idmapping.c:get_map_ranges(), make sure that the value passed
in for ranges did not overflow. Couldn't happen with the current
code, but this is a sanity check for any future potential mis-uses.
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
subordinate_parse is supposed to return a static structure that
represents one line in /etc/subuid or /etc/subgid. I goofed and
failed to make the variable rangebuf that holds the username of
in the returned structure static.
Add this missing static specification.
Author: <Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
These files list the set of subordinate uids and gids that users are allowed
to use. The expect use case is with the user namespace but other uses are
allowed.
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
To support files that do not have a simple unique key implement
commonio_append to allow new entries to be added.
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
* libmisc/salt.c: random() max value is 2^31-1 (same as RAND_MAX
on GNU). As it is not clear whether on some systems the max value
can exceed this number and whether some systems have max values
which would be lower, we take this into account when defining the
salt size and number of rounds for SHA encrypted passwords. Higher
values are favored.
Review b10cba0e0a and 7a16f4582d:
* lib/groupio.c (merge_group_entries): Do not allocate more than
necessary (sizeof char* instead of char).
Thanks for Tomáš Mráz (alioth#313962)
* lib/groupio.c (merge_group_entries): Document that new_members
is correctly NULL terminated. (alioth:#313940)
Align previous ChangeLog entries.
* Changelog: Update documentation of 2013-07-28 mancha entry.
* lib/prototypes.h, lib/encrypt.c: Update splint marker,
pw_encrypt can return NULL.
* lib/encrypt.c: Fix outdated statement on GNU crypt.
* src/chgpasswd.c: Improve diagnostic to user when pw_encrypt
fails and use fail_exit() instead of exit().
* src/chpasswd.c: Likewise.
* src/newusers.c: Likewise.
* src/passwd.c: Likewise when new password is encrypted.
* src/newgrp.c: Improve diagnostic to user and syslog when
pw_encrypt fails. Do not apply 1s penalty as this is not an
invalid password issue.
* src/passwd.c: Likewise when password is checked.
* libmisc/setupenv.c: xstrdup the static char* temp_pw_dir /
temp_pw_shell. That way we can continue to use pw_free() without
segving. Thanks to Serge Hallyn for the patch.
a salt that violates specs. On Linux, crypt() also fails with
DES/MD5 salts in FIPS140 mode. Rather than exit() on NULL returns
we send them back to the caller for appropriate handling.
man5, man8 subdirectories. This fix the generation of .so links
which did not point to a path relative to the top-level manual
hierarchy.
* man/generate_mans.mak: Update man paths accordingly.
* man/Makefile.am: Likewise.
* man/da/Makefile.am: Likewise.
* man/de/Makefile.am: Likewise.
* man/fr/Makefile.am: Likewise.
* man/it/Makefile.am: Likewise.
* man/pl/Makefile.am: Likewise.
* man/ru/Makefile.am: Likewise.
* man/sv/Makefile.am: Likewise.
* man/zh_CN/Makefile.am: Likewise.
enabled. This is not done by pam_lastlog. This was broken on
2011-07-23.
* NEWS, libmisc/utmp.c: Do not log in wtmp when PAM is enabled.
This is done by pam_lastlog.
* lib/nscd.c: Add missing newline to error message.
* lib/nscd.c: If nscd is installed but not in use, then running
`nscd -i` will exit(1). We shouldn't warn in this case since this
is not abnormal behavior.
libmisc/copydir.c, lib/selinux.c: Move set_selinux_file_context()
and reset_selinux_file_context() from libmisc/copydir.c to
lib/selinux.c.
* lib/commonio.c: Use set_selinux_file_context() and
reset_selinux_file_context() instead of using the existing
database SELinux context to set the context for the newly created
files.
* lib/commonio.c: Avoid multiple statements per line.
* lib/commonio.c: Ignore fclose return value when the file was
open read only or was not changed, or if an error is already
reported.
annotations.
* src/pwconv.c, src/pwunconv.c, src/grpconv.c, src/grpunconv.c:
Ignore return value of spw_rewind, pw_rewind, sgr_rewind, and
gr_rewind.
* lib/commonio.h: Both head and tail cannot be owned. Set tail as
dependent.
* src/expiry.c: Ignore return value of expire ().
* src/expiry.c: The catch_signals function does not use its sig
parameter.
* src/userdel.c: Last audit_logger parameter is a
shadow_audit_result, use SHADOW_AUDIT_FAILURE instead of 0.
src/chsh.c, src/groupadd.c, src/groupdel.c, src/groupmems.c,
src/groupmod.c, src/newusers.c, src/useradd.c, src/userdel.c,
src/usermod.c: Provide the PAM error
message instead of our own, and log error to syslog.
* src/groupmems.c: Exit with exit rather than fail_exit in usage().
* src/newusers.c: Check the number of arguments.
* src/newusers.c: Do not create the home directory when it is not
changed.
* src/useradd.c: Set the group password to "!" rather "x" if there
are no gshadow file.
* src/pwck.c: optind cannot be greater than argc.
* src/pwck.c: If spw_opened, then is_shadow is implicitly set.
* src/pwck.c: Do not report passwd entry without x password and a
shadow entry in --quiet mode (no interaction with the caller)
* src/pwck.c: Do not check if the last password change is in the
future if the time is set to 0.
audit after the potential chroot.
* src/groupadd.c: Check atexit failures.
* src/groupadd.c: Return E_SUCCESS instead of exit'ing at the end
of main().
po/POTFILES.in: Add process_root_flag() to process the --root
option and chroot so that the chroot config is used and changes
are applied to the chroot.
man/sv/Makefile.am, man/pl/Makefile.am, man/zh_CN/Makefile.am,
man/it/Makefile.am, man/Makefile.am: Include man_nopam in
EXTRA_DIST only when USE_PAM (they are already in man_MANS
otherwise).
* lib/prototypes, libmisc/basename.c (Basename): Input is a
constant string.
* lib/prototypes.h, lib/spawn.h, lib/spawn.c, src/userdel.c,
lib/nscd.c, lib/Makefile.am: Delete spawn.h. Move from spawn.h to
prototypes.h.
* src/userdel.c: Remove unused variables.
* lib/nscd.c: Remove unused header files.
* lib/nscd.c: Add the program name to error messages.
* lib/nscd.c: Indicate when nscd does not terminate normally (signal).
* lib/spawn.c: Updated header.
* lib/spawn.c: Flush stdout and stderr to avoid inheriting from
ongoing buffers.
* lib/spawn.c: Avoid implicit conversion of pointer to boolean.
* lib/spawn.c: Replace perror by a complete message.
* lib/spawn.c: Continue to wait for the child if another child
terminates.
* lib/prototypes.h: The name field from cleanup_info_mod is a
constant string. (username).
* src/grpconv.c: At the end of main, the passwd and shadow files
are locked. No need to check before unlocking. No need to set the
lock as false neither since there cannot be anymore failures.
strtoday(). But we need to support "-1" specifically.
* src/chage.c: Fix usage: LOGIN is mandatory.
* src/chage.c: Display disabled expiry or last change as "-1"
instead of 1969-12-31. 1969-12-31 is still supported as input from
the user.
* src/chage.c: Exit cleanly with fail_exit() (lock files were not
removed).
USER_DEFAULTS_FILE.
* src/useradd.c: Fix cut&paste issue causing bad warning when
the useradd.default file contains an invalid INACTIVE= value.
* src/useradd.c: Added missing end of line for rename errors.
* src/useradd.c: Added -D synopsis to the usage message.
* src/useradd.c: Do not scale_age(-1), just use -1.
* src/useradd.c: Added FIXME to be fixed later.
* src/useradd.c: Allow -e -1 when there is no shadow file.
* src/useradd.c: Fail, but do not print the usage message when the
-e argument is not valid.
* src/useradd.c: No need to check for oflg since uflg is
already checked.
save_caller_context() is allocated and freed.
* src/su.c: Added missing #endif indication
* src/su.c save_caller_context(): password only needed if
SU_ACCESS and !USE_PAM.
instead of 'x'. Only when it is confirmed that a shadow entry is
(will be) added, set the passwd's password to 'x'.
* src/newusers.c: An invalid line is an error. A failure needs to
be reported.
* lib/Makefile.am: Added lib/spawn.c and lib/spawn.h.
* lib/nscd.c, lib/spawn.c, lib/spawn.h: It is not possible to
differentiate between an nscd failure, and a failure to execute
due to no nscd with posix_spawn. Use our own run_command routine.
* src/userdel.c: Use run_command()
* src/usermod.c (date_to_str): buf needs to be unique (e.g.
independent from negativ), and is an out buffer.
* src/usermod.c: Ignore return value from snprintf, and force
nul-termination of buffer.
* src/usermod.c: Improve memory management.
* src/usermod.c: An audit bloc was not reachable, moved above on
success to move the home directory.
* src/usermod.c: Ignore close() return value for the mailbox
(opened read only).
set to 'x' in passwd and there are no entry in shadow for the
user.
* NEWS, src/chgpasswd.c: Create a gshadow entry if the password is
set to 'x' in group and there are no entry in gshadow for the
group.
set to 'x' in passwd and there are no entry in shadow for the
user.
* NEWS, src/chgpasswd.c: Create a gshadow entry if the password is
set to 'x' in group and there are no entry in gshadow for the
group.
options are provided.
* src/pwunconv.c: Re-indent.
* src/pwunconv.c: Open the shadow file read only.
* src/grpunconv.c: Exit after printing usage when arguments or
options are provided.
* src/grpunconv.c: Open the gshadow file read only.
not return.
* src/chpasswd.c: Reindent.
* src/chpasswd.c: Remove dead code. No need to set crypt_method
to NULL when it is already NULL. sflg is only set if crypt_method
is not NULL.
return.
* src/faillog.c: Fix message: this is faillog, not lastlog.
* src/faillog.c: Check that there are no extra arguments after
parsing the options.
not return.
* src/chgpasswd.c: Split usage in smaller parts. Those parts are
already translated for chpasswd. Usage is now closer to
chpasswd's.
* src/chgpasswd.c: Remove dead code. No need to set crypt_method
to NULL when it is already NULL. sflg is only set if crypt_method
is not NULL.
* src/grpck.c: Avoid implicit conversion of pointer to boolean.
* src/grpck.c: Remove dead code. argc cannot be lower than optind.
Avoid checking twice in a row for NULL != list[i].
invalid configuration.
* libmisc/find_new_gid.c, libmisc/find_new_uid.c: Updated
comments.
* libmisc/find_new_gid.c, libmisc/find_new_uid.c: Be more strict
on the loop stop conditions. Stop if we passed the limit, even if
the limit itself was never noticed.
indicate why locking failed.
* NEWS, lib/commonio.c: Fix the sort algorithm in case of NIS. NIS
entries were dropped.
* lib/commonio.c: NIS entries can start by '+' or '-'.
exists but there are no shadow entries, an entry has to be created
if the password is changed and passwd requires a shadow entry, or
if aging features are used (-e or -f). Document this and also that
-e and -f require a shadow file.
provided. Update the error message.
* src/usermod.c (process_flags): Check option compatibility and
dependency before options are discarded when no changes are
requested.
* src/su.c: Added function prototypes.
* src/su.c: Rename shellstr parameter to shellname to avoid
collision with static variable.
* NEWS, src/su.c: Added support for PAM modules which change
PAM_USER.
child and listening for signal in the parent from run_shell().
prepare_pam_close_session() is now executed before the creation of
the pam session and before the UID is changed. This allows to
close the session as root.
use the pwent global variable to communicate between APIs of
different files. Added boolean parameter su_to_root to
check_su_auth().
* src/su.c (check_perms): Return the passwd entry of the finally
authenticated user. Remove usage of the pwent variable.
* src/su.c: The password of the caller is the one from the
spwd structure only if the passwd's password is 'x'.
after the switch to the final subsystem. The previous architecture
forced to always change the environment (the shell starts with a
'*' and was thus restricted, and change_environment could not be
reset to false).
definition of shellstr, PATH and IFS is not influenced (getenv,
getdef, restricted_shell) by and does not influence (addenv does
not change environ) the authentication. And the authentication
does not overwrite those definitions. This will ease an extraction
from the big main() function.
commands executed with -c. This prevents tty hijacking which could
lead to execution with the caller's privileges. This required to
forward signals from the terminal (SIGINT, SIGQUIT, SIGTSTP) to
the executed command.
Makefile.
* man/Makefile.am: Build zh_CN pages.
* man/generate_translations.mak: Add config.xml to CLEANFILES.
* man/po/zh_CN.po: limits, groups, faillog, expiry should not be
translated (command name, file name), also this broke the build
system as they are used to derive manpage names.
Makefile.
* man/Makefile.am: Build zh_CN pages.
* man/generate_translations.mak: Add config.xml to CLEANFILES.
* man/po/zh_CN.po: limits, groups, faillog, expiry should not be
translated (command name, file name), also this broke the build
system as they are used to derive manpage names.
entry validity before commits to databases.
* libmisc/fields.c, libmisc/Makefile.am, lib/fields.c,
lib/Makefile.am, po/POTFILES.in: fields.c moved from libmisc to
lib.
for autogen.sh)
* configure.in, man/po/Makefile.in.in, man/po/Makefile.in:
Makefile.in.in replaced by Makefile.in to avoid config.status
issues when there are multiple po directories.
* man/po/LINGUAS: Adapted to above change.
* man/po/POTFILES.in, man/po/XMLFILES: POTFILES.in replaced by
XMLFILES.
* man/Makefile.am: generate_mans.deps shall be included by make,
not automake.
* libmisc/copydir.c: Missing parenthesis in comment.
* libmisc/chowndir.c: Fixed memory leak on failed realloc().
* libmisc/chowndir.c: Make sure the buffer for the path is large
enough.
* libmisc/remove_tree.c: Remove check for NULL before free().
selinux_file_context renamed set_selinux_file_context.
* lib/protoypes.h, libmisc/copydir.c, src/useradd.c:
Added reset_selinux_file_context.
* src/useradd.c: Check the return value of
set_selinux_file_context and reset_selinux_file_context.
* libmisc/copydir.c: Check the return value of
reset_selinux_file_context.
boolean.
* libmisc/basename.c: Avoid implicit conversion of pointer to
boolean.
* libmisc/basename.c, lib/prototypes.h (Basename): Return a
constant string.
* libmisc/basename.c, libmisc/obscure.c, lib/prototypes.h,
libmisc/xmalloc.c, libmisc/getdate.h, libmisc/system.c,
libmisc/getgr_nam_gid.c, libmisc/failure.c, libmisc/valid.c: Add
splint annotations.
* libmisc/chowndir.c: Avoid memory leak.
* libmisc/chowndir.c: Do not check *printf/*puts return value.
* libmisc/chowntty.c: Avoid implicit conversion between integer
types.
* libmisc/obscure.c: Return a bool when possible instead of int.
* libmisc/shell.c: Do not check *printf/*puts return value.
* libmisc/shell.c: Do not check execle return value.
* libmisc/setupenv.c: Avoid implicit conversion between integer
types.
* libmisc/xmalloc.c: size should not be zero to avoid returning
NULL pointers.
* libmisc/hushed.c: Do not check *printf/*puts return value.
* libmisc/system.c: Avoid implicit conversion of integer to
boolean. safe_system last argument is a boolean.
* libmisc/system.c: Check return value of dup2.
* libmisc/system.c: Do not check *printf/*puts return value.
* libmisc/system.c: Do not check execve return value.
* libmisc/salt.c: Do not check *printf/*puts return value.
* libmisc/loginprompt.c: Do not check gethostname return value.
* libmisc/find_new_gid.c, libmisc/find_new_uid.c: Do not check
gr_rewind/pw_rewind return value.
* libmisc/ttytype.c: Limit the number of parsed characters in the
sscanf format.
* libmisc/ttytype.c: Test if a type was really read.
* libmisc/sub.c: Do not check *printf/*puts return value.
* libmisc/sub.c: Avoid implicit conversion of integer to boolean.
* src/userdel.c: Fix typo in comment.
* src/userdel.c: Avoid implicit conversion of boolean to integer.
* src/userdel.c: safe_system last argument is a boolean.
* src/newusers.c: Avoid implicit conversion of boolean to integer.
* src/newusers.c: Avoid implicit conversion of integer to boolean.
* src/usermod.c: Add brackets.
* src/usermod.c: Avoid implicit conversion of characters or
integers to booleans.
* src/vipw.c: Avoid implicit conversion of integer to boolean.
* src/su.c: Avoid implicit conversion of integer to boolean.
* src/su.c: Add brackets.
* src/useradd.c: Avoid implicit conversion of characters or
integers to booleans.
instead of an int.
* libmisc/obscure.c, libmisc/tz.c, src/passwd.c, lib/encrypt.c,
libmisc/copydir.c, lib/prototypes.h: Add splint annotations.
* libmisc/tz.c: Fix some const issues.
* libmisc/tz.c: Avoid multi-statements lines.
* libmisc/tz.c: Add brackets.
* libmisc/copydir.c: Do not check *printf/*puts return value.
* libmisc/copydir.c: Fail if we cannot set or reset the SELinux
fscreate context.
* libmisc/copydir.c: Use xmalloc instead of malloc.
* libmisc/copydir.c: Do not check lutimes return value
* src/vipw.c: Avoid implicit conversion of integer to boolean.
* src/su.c (iswheel): Return a bool instead of an int.
* src/passwd.c: Remove insert_crypt_passwd(). Use xstrdup instead.
* src/passwd.c: Return constant strings when sufficient.
* src/passwd.c: Do not check *printf/*puts return value.
* src/passwd.c: Avoid implicit conversion of character to boolean.
* src/passwd.c: Do not check sleep return value.
* src/sulogin.c: Do not check *printf/*puts return value.
* lib/encrypt.c: Do not check fprintf return value.
copy the extended attributes (the SELinux context is hence reset)
* src/usermod.c: Copy the extended attributes.
* src/useradd.c: Only reset the SELinux context.
libmisc/sulog.c, libmisc/hushed.c, libmisc/failure.c,
libmisc/loginprompt.c, libmisc/ttytype.c,
libmisc/pam_pass_non_interractive.c, src/userdel.c, src/login.c,
lib/commonio.c, lib/commonio.h: Fix some const issues.
* libmisc/motd.c: Avoid multi-statements lines.
* libmisc/motd.c: Support long MOTD_FILE.
* libmisc/list.c, lib/prototypes.h: Revert previous change.
dup_list and is_on_list are used with members as defined for the
group structure, and thus even if the list is not modified, the
list elements cannot be constant strings.
* libmisc/system.c: Avoid C++ comments.
* src/vipw.c: WITH_TCB cannot be tested inside a gettextized
string. Split the Usage string.
* lib/commonio.h: Re-indent.
* src/useradd.c: spool is a constant string.
* src/useradd.c: Set the new copy_tree's paramater 'copy_root' to false
2010-04-04 Nicolas François <nicolas.francois@centraliens.net>
* src/usermod.c: move_home() is only called if mflg is set.
* src/usermod.c: Fail is -m is provided but the old home directory
is not a directory.
* src/usermod.c: Use the previous improvement of copy_tree to
provide better error diagnosis.
* src/usermod.c: When rename() is used, also change the ownership.
* src/usermod.c: Do not change the ownership of the root directory
twice.
* src/usermod.c: When -u is provided, only change the ownership of
the home directory if it is a directory.
* src/usermod.c: Also change ownerships when -g is used.
2010-04-04 Nicolas François <nicolas.francois@centraliens.net>
* lib/prototypes.h, libmisc/copydir.c: Add the old UID and GID to
copy_tree to detect when ownership shall be changed.
* libmisc/copydir.c: Document the behavior when the IDs are set to
-1.
* lib/prototypes.h, libmisc/copydir.c (copy_tree): Add parameter
copy_root.
* libmisc/copydir.c: error() and ctx can be static.
* libmisc/copydir.c (copy_hardlink): Remove parameter src.
2010-04-04 Nicolas François <nicolas.francois@centraliens.net>
* libmisc/chowndir.c: Dynamically allocate memory to support
path longer than 1024 characters.
* libmisc/chowndir.c: Fix typos in documentation.
* libmisc/chowndir.c: Support and document the behavior when a old
or new ID is set to -1.
* libmisc/chowndir.c: Improved error detection when chown fails.
* libmisc/chowndir.c: Harmonize error handling strategy when an
error occurs: stop changing ownership as soon as an error was
detected.
* src/login_nopam.c: Limit the scope of variables end, lineno, i,
str_len.
* src/logoutd.c: Limit the scope of variable c.
* src/vipw.c: Re-indent.
* src/vipw.c: Close the file after the creation of the backup.
* src/useradd.c (set_default): Close input file on failure.
* src/useradd.c: Limit the scope of variables spool, file, fd, gr,
gid, mode.
* src/passwd.c: Limit the scope of variables last and ok.
* src/chage.c: Fix typo (non breaking space).
* src/login.c: Limit the scope of variables erasechar killchar, c,
failed.
* src/groups.c: Limit the scope of variable ngroups, pri_grp, i.
* src/id.c: Limit the scope of variable i.
no more used.
* lib/groupmem.c: Limit the scope of variable i.
* lib/shadow.c: Avoid implicit conversion of pointers and integers
to booleans.
* lib/shadow.c: Added brackets.
* libmisc/limits.c: Limit the scope of variable tmpmask.
* libmisc/copydir.c: Close opened file on failure.
* libmisc/loginprompt.c: Limit the scope of variable envc.
* libmisc/find_new_uid.c, libmisc/find_new_gid.c: Limit the scope
of variable id.
* NEWS, libmisc/limits.c, man/limits.5.xml: Add support for
infinite limits.
* NEWS, libmisc/limits.c, man/limits.5.xml: Add support for @group
syntax.
they are already specified in number of days since Epoch. Return
-2 in case of errors to support the specification of -1.
* src/usermod.c, src/useradd.c: Adapt to the new error value of
strtoday().
* src/chage.c: Remove isnum(). Adapt to the new error value of
strtoday(). Support for numerical dates is moved to strtoday().
* src/pwck.c: Add support for TCB.
* src/pwck.c: Use spw_dbname() instead of spw_file since TCB
changes from a file to another depending on the user. Also use
pw_dbname() for consistency.
-a option.
* NEWS, man/faillog.8.xml, src/faillog.c: Extend the -a option to
the non-display mode. This changes the default behavior of the -l,
-m, -r, -t options when -a is not specified (restrict to existing
users).
man/pwconv.8.xml, man/useradd.8.xml, man/userdel.8.xml,
man/usermod.8.xml, man/vipw.8.xml: Document the usage of the
TCB_AUTH_GROUP, TCB_SYMLINKS, and USE_TCB configuration
parameters.
* man/pwconv.8.xml, man/pwck.8.xml: Document the behavior when
USE_TCB is enabled.
translation.
* lib/tcbfuncs.c: Indicate the name of the program in error
messages. Avoid perror.
* src/useradd.c: Re-indent.
* src/useradd.c: Add more strings for translation. Indicate the
name of the program in error messages.
* src/userdel.c: Re-indent.
* src/userdel.c: Add more strings for translation. Indicate the
name of the program in error messages.
* lib/shadowio.c: Added brackets and parenthesis.
* lib/shadowio.c: Document the sections closed by #endif
* lib/shadowio.c: Avoid negation of comparisons.
* lib/shadowio.c: Avoid implicit conversion of integer to booleans
and booleans to integers.
* src/vipw.c: Avoid implicit conversion of pointers or integers to
booleans.
* src/vipw.c: Added brackets and parenthesis.
* src/vipw.c: Limit the definition of some variables and macros to
the WITH_TCB scope.
* src/vipw.c: Avoid assignment in comparisons.
* src/vipw.c: Replace PASSWD_FILE (resp. GROUP_FILE and
SGROUP_FILE) by pw_dbname () (resp. gr_dbname () and sgr_dbname ()).
This is more consistent with the shadow file handling and may be
useful to allow edition of another partition's files.
* NEWS: Add support for TCB.
* lib/tcbfuncs.h, lib/tcbfuncs.c, lib/Makefile.am: New library to
support TCB.
* lib/prototypes, libmisc/copydir.c (remove_tree): Add boolean
parameter remove_root.
* configure.in: Add conditional WITH_TCB.
* src/userdel.c, src/usermod.c: Add support for TCB. Update call to
remove_tree().
* src/pwconv.c, src/pwunconv.c: Should not be used with TCB enabled.
* src/vipw.c: Add support for TCB. Update call to remove_tree().
* src/useradd.c: Add support for TCB. Open the shadow file outside
of open_files().
* src/chage.c: Add support for TCB.
* src/Makefile.am: Install passwd sgid shadow when TCB is enabled.
* lib/getdefs.c, man/vipw.8.xml, man/login.defs.5.xml,
man/login.defs/TCB_AUTH_GROUP.xml, man/login.defs/USE_TCB.xml,
man/login.defs/TCB_SYMLINKS.xml, man/generate_mans.mak,
man/generate_mans.deps, man/Makefile.am: New configuration
parameters: TCB_AUTH_GROUP, TCB_SYMLINKS, USE_TCB.
* lib/shadowio.c, lib/commonio.c: Add support for TCB.
--preserve-environment. This sanitation was disabled on Debian
since quite some time with no reported issues, and sanitize_env()
documentation agrees that it should be useless as all modern
Unixes will handle setuid executables properly. This Fixes
Alioth#312287.
* src/su.c: Add more messages for translation.
* src/su.c: Ignore kill() return value when sending the TERM
signal. If it fails, a KILL should be sent anyway.
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. See http://bugs.gentoo.org/282094
* NEWS, man/su.1.xml: Document su's exit values.
po/Makefile.in.in: Removing and restoring the config.xml file
broke parallel builds. Build the manpages based on *.xml-config
files instead of *.xml files. The *.xml do not include config.xml
anymore, which permits to run xml2po without needing to remove
config.xml. The config.xml is restored in the *.xml-config files.
* man/groupadd.8.xml: Implementation of the above.
* man/generate_mans.deps: Updated dependencies
spwd. (start with the primitive types)
* lib/shadowmem.c: Avoid memzero() on a possibly NULL pointer.
* lib/groupmem.c: Only copy the required fields of the struct
group. (start with the primitive types)
* lib/groupmem.c: Avoid memzero() on a possibly NULL pointer.
* lib/groupmem.c: Free gr_mem in addition to its elements.
* lib/sgroupio.c: The struct sgrp has no primitive types to be
copied initially.
* lib/sgroupio.c: Avoid memzero() on a possibly NULL pointer.
* lib/sgroupio.c: Free sg_mem and sg_add in addition to their
elements.
* lib/pwmem.c: Only copy the required fields of the struct
passwd. (start with the primitive types)
src/chpasswd.c, src/groupmems.c, src/usermod.c, src/chgpasswd.c,
src/vipw.c, src/su.c, src/useradd.c, src/groupmod.c, src/passwd.c,
src/groupadd.c, src/chage.c, src/faillog.c, src/chsh.c: Use
booleans for tests.
* src/userdel.c, src/gpasswd.c, src/groupmems.c, src/usermod.c,
src/groupmod.c, src/passwd.c: Use a break even after usage().
src/newusers.c, src/chpasswd.c, src/groupmems.c, src/usermod.c,
src/chgpasswd.c, src/vipw.c, src/su.c, src/useradd.c,
src/groupmod.c, src/passwd.c, src/groupadd.c, src/chage.c,
src/faillog.c, src/chsh.c: If someone uses the -h/--help options,
the usage should not go to stderr nor should the utility exit with
non-zero status. All of the shadow utils do just this
unfortunately, so convert them over to sanity.
* man/groupmems.8.xml, man/gpasswd.1.xml: Added option -h/--help.
* NEWS, libmisc/find_new_gid.c, libmisc/find_new_uid.c: Since
system accounts are allocated from SYS_?ID_MIN to SYS_?ID_MAX in
reverse order, accounts are packed close to SYS_?ID_MAX if
SYS_?ID_MIN is already used but there are still dome gaps.
getpwent / getgrent for system accounts. Trying the low-IDs with
getpwuid / getgrgid should be more efficient on LDAP configured
systems with many accounts.
libmisc/xgetpwuid.c, libmisc/xgetgrgid.c, libmisc/xgetspnam.c: Do
not limit the size of the buffer to hold the group or user
structure. It used to be limited to 16k, which caused issues with
groups having many users.
* man/su.1.xml: Improve the documentation of the su behavior
regarding environment variables.
* man/su.1.xml: Document that the login.defs file is used.
* po/shadow.pot, man/po/shadow-man-pages.pot: Regenerated.
* po/*.po, man/po/*.po: Updated PO files.
* man/passwd.1.xml: passwd -u does not reset the expiry field.
* NEWS, src/userdel.c: When USERGROUPS_ENAB is enabled, remove the
user's group when the user was the only member. This is still not
complete, as the user could have been specified twice in the
members.
* NEWS, src/userdel.c: Do not fail when -r is used and the home
directory does not exist.
Harmonize formatting of login.defs and default/useradd variables.
Use an <option> tag.
* man/usermod.8.xml: Added reference to gshadow(5).
* man/login.defs.d/USERDEL_CMD.xml: Shorten the lines of the
USERDEL_CMD example.
man/groupadd.8.xml, man/usermod.8.xml, man/chgpasswd.8.xml,
man/groupmod.8.xml: Added warning: passwords set with these tools
may not respect the password policy.
lib/prototypes.h: Move user_busy() to libmisc/user_busy.c.
* NEWS, libmisc/user_busy.c: On Linux, do not check if an user is
logged in with utmp, but check if the user is running some
processes. If not on Linux, continue to search for an utmp record,
but make sure the process recorded in the utmp entry is still
running.
shell as a shell script when the direct execution of the user's
shell failed with ENOEXEC and the user's shell has a shebang. The
interpreter might not be the right one. Executing the user's
shell with sh -c might be better, but I'm not sure we should try
harder when there is a failure. Note: The removed code was only
included #ifndef __linux__.
with a NULL argument.
* src/useradd.c: Replace PATH_MAX by a fixed constant. The buffer
was not meant as a storage for a path.
* src/useradd.c, src/newusers.c, src/chpasswd.c: Better detection
of fgets errors. Lines shall end with a \n, unless we reached the
end of file.
* libmisc/copydir.c: Avoid PATH_MAX. Support file paths with any
length. Added readlink_malloc().
and the password field in passwd is not 'x'.
* src/grpck.c: Warn if a group has an entry in group and gshadow,
and the password field in group is not 'x'.
man/login.defs.d/MD5_CRYPT_ENAB.xml,
man/login.defs.d/SHA_CRYPT_MIN_ROUNDS.xml: Updated note for PAM
enabled versions. These variables are only used for group
passwords in this case.
changing the passwords with PAM.
* src/newusers.c: Split the usage string in smaller parts to
allow enabling single parts.
* man/newusers.8.xml: Indicate the options and configuration
variables valid for PAM and non-PAM versions.
* man/newusers.8.xml: Added pointer to /etc/pam.d/chpasswd.
libmisc/pam_pass_non_interractive.c, libmisc/Makefile.am: Renamed.
* libmisc/pam_pass_non_interractive.c, lib/prototypes.h:
non_interactive_password and non_interactive_pam_conv do not need
to be externally visible.
* libmisc/pam_pass_non_interractive.c: Added declaration of
ni_conv.
* libmisc/pam_pass_non_interractive.c: Only compile ifdef USE_PAM.
* libmisc/pam_pass_non_interractive.c, lib/prototypes.h:
Added do_pam_passwd_non_interractive().
* src/chpasswd.c: Use do_pam_passwd_non_interractive().
* man/chpasswd.8.xml: Describe the PAM enabled chpasswd behavior.
* man/chpasswd.8.xml: Differentiate the files and configurations
needed for PAM and non PAM versions.
instead of only the username.
* src/chpasswd.c: PAM enabled chpasswd do may change the password
database (for the user where the password update succeeded) even
if there were a failure for one user. Do not indicate that changes
were ignored.
unlink() in case of failure of fopen_set_perms() or
create_backup().
* lib/commonio.c: Should the backup file be unlink'ed in case of
failure of create_backup()?
* libmisc/chowntty.c, libmisc/rlogin.c, libmisc/sub.c,
src/newusers.c, libmisc/sulog.c, libmisc/system.c, src/logoutd.c,
src/groups.c, src/id.c, lib/encrypt.c, libmisc/audit_help.c,
libmisc/limits.c: Return EXIT_FAILURE instead of 1, and
EXIT_SUCCESS instead of 0.
* libmisc/audit_help.c: Replace an fprintf() by fputs().
* libmisc/audit_help.c: Remove documentation of the audit_logger
returned values. The function returns void.
* libmisc/system.c: Only return status if waitpid succeeded.
Return -1 otherwise.
with PAM.
* src/chpasswd.c: Split the usage string in smaller parts to
allows enabling single parts.
* src/chpasswd.c: Do not set a global lock on the password files.
This is done by PAM each time a password is updated.
man/useradd.8.xml: Added note to warn about insecurity in using
--password.
* man/groupmod.8.xml: Removed not regarding default if --password
is not used. This was a cut&paste from groupadd.8.xml.
* man/passwd.1.xml: Split some paragraphs.
* man/passwd.1.xml: Recommend other encryption methods than DES.
* libmisc/copydir.c: Added assert to help splint.
* libmisc/copydir.c: Free allocated structures in cas of failure.
* libmisc/copydir.c: Avoid implicit conversion of pointers to
booleans.
* libmisc/copydir.c: Use buffers of size PATH_MAX instead of 1024
for filenames.
* libmisc/copydir.c: Use fchmod and fchown to change the mode of
the opened file.
* libmisc/copydir.c: Indicate the mode to open(), even if we chmod
later.
* src/useradd.c: Replace peror by an strerror and avoid an
intermediate buffer.
* src/useradd.c: Save errno between the failure and the report by
perror/strerror.
* src/useradd.c: Prefer xmalloc to malloc.
limit with getlog() / getulong(). This also means, in case of
non-PAM enabled systems, that the umask specified on the GECOS
fields should start with a 0 if specified in octal. (it used to be
force to octal). Do the appropriate cast and range checking.
lib/pwio.c, lib/pwio.h, lib/shadowio.c, lib/shadowio.h: Added
splint annotations. The *_locate() and *_next() functions
currently return an observer. As the structure are often modified
by the caller, it could maybe be changed to exposed later. (and
non-const).
* src/newgrp.c: audit_buf is only used in newgrp. Make it static.
* src/newgrp.c: Ignore the return value of fputs().
* src/newgrp.c: Use exit(EXIT_FAILURE) instead of exit(1).
* libmisc/setupenv.c: Added brackets and parenthesis.
* libmisc/setupenv.c: Ignore the return value of fclose (file
opened read-only)
* libmisc/setupenv.c: Ignore the return value of puts().
* libmisc/setupenv.c:Avoid implicit conversion of pointers to
booleans.
* libmisc/age.c: Added brackets and parenthesis.
* libmisc/age.c: Ignore the return value of fclose (file opened
read-only)
* libmisc/age.c: Ignore puts() return value.
* libmisc/age.c: Use exit(EXIT_FAILURE) instead of exit(1).
* libmisc/age.c: Avoid assignments in comparisons.
* src/lastlog.c: Added splint annotations.
* src/lastlog.c: Avoid global pwent.
* src/lastlog.c: Cast ID to ulongs and use ulong formats for IDs.
* src/lastlog.c: Avoid assignment in comparisons.
* src/lastlog.c: Ignore fclose() return value since the file is
only opened for reading.
used_gids.
* libmisc/find_new_gid.c: Use getdef_ulong and cast to git_t to
get GID values.
* libmisc/find_new_gid.c: Use UL as a prefix for ulong values.
* libmisc/find_new_uid.c: Likewise.
default to 32.
* libmisc/chkname.c: Use USER_NAME_MAX_LENGTH.
* src/login.c: Use USER_NAME_MAX_LENGTH instead of the default 32.
username also needs to be bigger than USER_NAME_MAX_LENGTH because
it has to be nul-terminated.
change the terminal configuration. setup_tty() is just a best
effort configuration of the terminal.
* src/login.c: Ignore failures when setting the terminal
configuration.
* src/login.c: Fail if the ERASECHAR or KILLCHAR configurations
are not compatible with a cc_t type.
of global utent/utxent variables. Only reuse the ut_id and maybe
the ut_host fields from utmp.
* lib/prototypes.h, libmisc/utmp.c: Removed checkutmp(),
setutmp(), setutmpx().
* lib/prototypes.h, libmisc/utmp.c: Added get_current_utmp(),
prepare_utmp(), prepare_utmpx(), setutmp(), setutmpx().
* libmisc/utmp.c (is_my_tty): Only compare the name of the utmp
line with ttyname(). (No stat of the two terminals to compare the
devices).
* libmisc/utmp.c: Use getaddrinfo() to get the address of the
host.
* configure.in: Check for getaddrinfo().
* configure.in: Use AC_CHECK_MEMBERS to check for the existence of
fields in the utmp/utmpx structures.
* configure.in: Reject systems with utmpx support but no ut_id
field in utmp. This could be fixed later if needed.
* src/login.c: Use the new utmp functions. This also simplifies
the failtmp() handling.
* src/login.c: passwd_free() renamed to pw_free() and
shadow_free() renamed to spw_free()
* lib/shadowio.c: Use spw_free() for shadow_free().
* lib/groupmem.c: Added gr_free().
* lib/groupio.c: Use gr_free() for group_free().
* lib/pwmem.c: Include define.h before prototypes.h
* lib/pwmem.c: Added pw_free().
* lib/pwio.c: Use pw_free() for passwd_free().
* lib/sgroupio.c: Added sgr_free().
* lib/sgroupio.c: Use sgr_free() for gshadow_free().
* lib/prototypes.h: Added gr_free(), pw_free(), sgr_free(),
spw_free().
is always coming from xgetpwnam. There is no need to copy pwd to
pwent, this was not a good idea anyway as the strings from pwd
were not duplicated.
* src/login.c: Always free the pwd and spwd structure when we
retrieve a new one. This will clear the password of the previous
user from the memory.
* src/login.c: user_passwd is used to keep point to the password
of the user being authenticated.
* src/login.c: (non PAM) Fail if the user's entry cannot be found
after the user updated her password (if expire() requested an
update).
* src/login.c: If the user does not exist on the system, there is
no need to build a pwd structure (with shell).
username as first parameter of failtmp to avoid issues with
non-null terminated ut_user, unavailability of ut_user, incomplete
username (that should not happen currently).
username as first parameter of failtmp to avoid issues with
non-null terminated ut_user, unavailability of ut_user, incomplete
username (that should not happen currently).
* groupmems has a testsuite now
* long user names are tested for gpasswd
* groups and id arenot receiving updates
* tests with UID/GID sets to (*id_t)-1 already exist.
terminal termio flags. Reset echoprt, noflsh, tostop. This
behavior seems to have change by mistake in earlier releases
(4.0.8, for no obvious reason).
SELinux user for user's login.
* NEWS, src/usermod.c, man/usermod.8.xml: Likewise.
* libmisc/system.c, libmisc/Makefile.am, lib/prototypes.h: Added
safe_system(). Used to run semanage.
* lib/prototypes.h, libmisc/copydir.c: Make a
selinux_file_context() an extern function.
* libmisc/copydir.c: Reset SELinux to create files with default
contexts at the end of copy_tree().
* NEWS, src/userdel.c: Delete the SELinux user mapping for user's
login.
never set ifndef USE_PAM. Change the prototype of setup_uid_gid()
when USE_PAM is not defined. This permits to remove add_groups
from PAM builds. setup_uid_gid is already subject to
HAVE_INITGROUPS.
ifndef USE_PAM.
* lib/prototypes.h: Remove the declaration of add_cons_grps(). The
function does not exist.
* libmisc/age.c (setup_uid_gid): is_console is never set ifndef
USE_PAM. Change the prototype of setup_uid_gid() when USE_PAM is
not defined. This permits to remove add_groups from PAM builds.
setup_uid_gid is already subject to HAVE_INITGROUPS.
* libmisc/pwd2spwd.c (pwd_to_spwd): pwd_to_spwd() is not used in
PAM builds.
src/passwd.c, src/pwck.c, src/pwconv.c, src/useradd.c,
src/usermod.c: On Jan 01, 1970, do not set the sp_lstchg field to
0 (which means that the password shall be changed during the next
login), but use -1 (password aging disabled).
* src/passwd.c: Do not check sp_min if sp_lstchg is null or -1.
value should be -1 (no aging) rather than 0 (password must be
changed).
* src/chage.c: For password expiration and inactivity, indicate
that the password must be changed when sp_lstchg is null rather
than indicating that expiration and inactivity are not enabled.
database before calling spw_remove().
* NEWS, src/userdel.c: When the user's group is removed, make sure
the group is in the gshadow database before calling sgr_remove().
* src/userdel.c: Improve warning's wording.
expansion. Make sure config.xml does not exist when the POT file
is created in order to keep the configurations in the POT file
* man/generate_translations.mak: make sure config.xml does not
exist neither when the translated XML is generated. Add the
missing %config; (strip out by xml2po). and make sure config.xml
is present when the translated manpage is generated.
* man/generate_mans.mak: config.xml is needed for the generation
of manpages (already in the .deps for the English manpages, but
needed for the translations).
* man/Makefile.am: Added missing CREATE_HOME.xml.
as newgrp.
* man/login.defs.5.xml: vipw does not use any variable.
* man/login.defs.5.xml: In PAM enabled configurations, login still
uses some login.defs variables.
users with -u.
* src/faillog.c: Do not call print_one() for users which do not
exist.
* src/faillog.c: Make sure the user's entry is not outside the
faillog file and initialize the faillog structure in that case.
* src/faillog.c: Move print_one() closer to print().
* src/faillog.c: reset(), setmax(), set_locktime() can also change
entries of user which do not exist.
* src/faillog.c: reset(), setmax() and set_locktime() shall not
create entries for users which have no entries if the value has to
be set to 0.
* src/faillog.c: reset(), setmax() and set_locktime(): better
handling of users whose entry is outside the faillog file.
* src/faillog.c: Improved option handling. Options can now be
specified in any order.
* src/faillog.c: Improved warnings when options are not
compatible or when the faillog cannot be open with the right mode.
* src/faillog.c: Only fstat the faillog file once.
* man/faillog.8.xml: Improved documentation.
compiled when disabled at configuration time.
* src/chgpasswd.c: Make sure the SHA related variables is not
compiled when disabled at configuration time.
* src/chgpasswd.c: Fix the test for getlong() failure.
clash with the structure.
* src/lastlog.c: check the offset in print_one() so that it is
used for the display of one entry or a set of entries.
* src/lastlog.c: Do not loop over the whole user database when -u
is used with a single user.
* src/lastlog.c: Check the size of the lastlog file so that we
can identify failures to read.
when the changes are committed to the system. Do not log failure
for on-memory changes to audit or syslog. Make sure failures and
inconsistencies will be reported in case of unexpected failures
(e.g. malloc failures). Only specify an audit message if it is not
implicitly implied by the type argument. Removed fail_exit
(replaced by atexit(do_cleanups)). Log failures in case of
permission denied.
messages not related to an account.
* lib/prototypes.h, libmisc/cleanup.c, libmisc/cleanup_group.c,
libmisc/cleanup_user.c, libmisc/Makefile.am: Added stack of
cleanup functions to be executed on exit.
* NEWS, src/groupadd.c, src/groupdel.c, src/groupmod.c: Only
report success to audit and syslog when the changes are committed
to the system. Do not log failure for on-memory changes to audit
or syslog. Make sure failures and inconsistencies will be reported
in case of unexpected failures (e.g. malloc failures). Only
specify an audit message if it is not implicitly implied by the
type argument. Removed fail_exit (replaced by atexit(do_cleanups)).
configure option. The configure behavior encoded is:
<no option> -> default of 16 (like today);
--with-group-name-max-length -> default of 16;
--without-group-name-max-length -> no max length;
--with-group-name-max-length=n > max is set to n.
utmp.c to chowntty.c. checkutmp() now only uses an existing utmp
entry if the pid matches and ut_line matches with the current tty.
This fixes a possible DOS when entries can be forged in the utmp
file.
* libmisc/chowntty.c, src/login.c, lib/prototypes.h: Remove the
tty argument from chown_tty. chown_tty always changes stdin and
does not need this argument anymore.
man/grpck.8.xml: Sorted SEE ALSO references.
* man/gshadow.5.xml: Added reference to grpck(8) and grpconv(8).
* man/pwck.8.xml: Added reference to grpck(8).
* man/shadow.5.xml: Added reference to pwck(8).
* man/passwd.5.xml: Added reference to pwck(8).
* man/grpck.8.xml: Added reference to pwck(8).
parameter of -f. Fix the getopt optstring, remove the parsing of
username in the -f processing block, and remove unnecessary checks
(username cannot be parsed twice anymore), better documentation of
the synopsis.
caller, not the user login tries to authenticate.
* src/login.c: Use pwd->pw_name instead of pwd->pw_uid. This might
be more precise (name must be unique, uid might not be).
* src/pwck.c: Only unlock files if they were locked before (e.g.
not in read-only mode).
* src/pwck.c: Quote the username in error messages (harmonization
with other messages).
* libmisc/find_new_gid.c: Fixed typo (s/grp->gr_gid/group_id/).
* libmisc/find_new_gid.c: Likewise.
to create a home directory for new users.
* src/useradd.c, man/useradd.8.xml: New -M/--no-create-home option
and CREATE_HOME usage. System accounts are not impacted by
CREATE_HOME.
* man/useradd.8.xml: Indicate that a new group is created by
default.
* src/useradd.c: Removed TODO item (moved to the TODO file).
Thanks to Peter Vrabec.
* NEWS, libmisc/find_new_gid.c, libmisc/find_new_uid.c: Build an
index of used IDs to avoid a database request for each id in the
allowed range (when the highest allowed ID is already used).
This speedups the addition of users or groups when the highest
allowed ID is already used. The additional memory usage of the
tools should be acceptable when UID_MAX/SYS_UID_MAX are set to a
reasonable number.
* src/userdel.c, src/newusers.c, src/chpasswd.c, src/chfn.c,
src/groupmems.c, src/usermod.c, src/groupdel.c, src/chgpasswd.c,
src/useradd.c, src/groupmod.c, src/groupadd.c, src/chage.c,
src/chsh.c: If the username cannot be determined, report it as
such (not a PAM authentication failure).
--disable-account-tools-setuid options. This permits to disable
the PAM authentication of the caller for chage, chgpasswd,
chpasswd, groupadd, groupdel, groupmod, newusers, useradd,
userdel, and usermod. This authentication is not necessary when
these tools are not installed setuid root.
enable/disable the usage of PAM to authenticate the callers of
account management tools: chage, chgpasswd, chpasswd, groupadd,
groupdel, groupmod, useradd, userdel, usermod.
* src/Makefile.am: Do not link the above tools with libpam if
account-tools-setuid is disabled.
* src/userdel.c, src/newusers.c, src/chpasswd.c, src/usermod.c,
src/groupdel.c, src/chgpasswd.c, src/useradd.c, src/groupmod.c,
src/groupadd.c, src/chage.c: Implement ACCT_TOOLS_SETUID
(--enable-account-tools-setuid).
* etc/pam.d/Makefile.am: Install the pam service file for the
above tools only when needed.
* src/useradd.c, src/userdel.c, src/usermod.c: It is no more
needed to initialize retval to PAM_SUCCESS.
undefining some configuration macros when the file is included
multiple times.
* libmisc/xgetXXbyYY.c, libmisc/xgetpwnam.c, libmisc/xgetpwuid.c,
libmisc/xgetgrgid.c, libmisc/xgetgrnam.c, libmisc/xgetspnam.c:
Include <config.h> from teh compiled C file, not the included
getXXbyYY.c.
src/groupmems.c, src/usermod.c, src/groupdel.c, src/chgpasswd.c,
src/useradd.c, src/groupmod.c, src/groupadd.c, src/chage.c,
src/chsh.c: Simplify the PAM error handling. Do not keep the pamh
handle, but terminate the PAM transaction as soon as possible if
there are no PAM session opened.
src/newusers.c, src/pwconv.c, src/chpasswd.c, src/logoutd.c,
src/chfn.c, src/groupmems.c, src/usermod.c, src/pwunconv.c,
src/expiry.c, src/groupdel.c, src/chgpasswd.c, src/useradd.c,
src/su.c, src/groupmod.c, src/passwd.c, src/pwck.c,
src/groupadd.c, src/chage.c, src/login.c, src/grpconv.c,
src/groups.c, src/grpunconv.c, src/chsh.c: Prog is now global (not
static to the file) so that it can be used by the helper functions
of libmisc.
* lib/prototypes.h: Added extern char *Prog.
* libmisc/find_new_gid.c, libmisc/find_new_uid.c: Indicate the
program name with the warning.
shadow_audit_result for the result argument of audit_logger().
This permits stronger type checking and a better readability of
the results (SHADOW_AUDIT_FAILURE/SHADOW_AUDIT_SUCCESS constants).
* src/groupadd.c, src/groupdel.c, src/useradd.c, src/userdel.c:
Use the SHADOW_AUDIT_FAILURE/SHADOW_AUDIT_SUCCESS results instead
of 0 or 1 in audit_logger().
shadow_audit_result for the result argument of audit_logger().
This permits stronger type checking and a better readability of
the results (SHADOW_AUDIT_FAILURE/SHADOW_AUDIT_SUCCESS constants).
* src/groupadd.c, src/groupdel.c, src/useradd.c, src/userdel.c:
Use the SHADOW_AUDIT_FAILURE/SHADOW_AUDIT_SUCCESS results instead
of 0 or 1 in audit_logger().
audit.
* src/userdel.c: Log successful removal of home directory to audit
only in case of success.
* src/userdel.c: Move the audit log of failure to remove the home
directory before the call to function that may exit.
* src/userdel.c: Document that errors is only used to count errors
during the removal of the home directory.
changes have started to be reported to syslog.
* src/userdel.c: Fix some result parameters sent to
audit_logger().
* NEWS: Following changes from a patch contributed by Steve Grubb
<sgrubb@redhat.com>
* src/groupadd.c: Log to audit with type AUDIT_ADD_GROUP instead
of AUDIT_USER_CHAUTHTOK.
* src/groupdel.c: Log to audit with type AUDIT_DEL_GROUP instead
of AUDIT_USER_CHAUTHTOK.
* src/useradd.c: Log to audit with type AUDIT_ADD_USER /
AUDIT_ADD_GROUP / AUDIT_USYS_CONFIG instead of
AUDIT_USER_CHAUTHTOK.
* src/useradd.c: Add missing logs to audit.
* src/userdel.c: Log to audit with type AUDIT_DEL_USER /
AUDIT_DEL_GROUP instead of AUDIT_USER_CHAUTHTOK.
* src/userdel.c: Add missing logs to audit.
const. Duplicate this structure before working on it.
* src/groupmems.c: Do not fail and do not display warnings if a
close failure happens with the --list option. (Files are opened
read-only).
prototypes of the static functions.
* src/grpconv.c: Fail if unexpected parameters are provided.
* src/grpconv.c: Indicate that argc is not used in the no
SHADOWGRP version.
Include <sys/types.h> before <pwd.h> and <grp.h>. It is necessary
for the definition of uid_t and gid_t.
* lib/pwmem.c: do not include <pwd.h>, "pwio.h" is sufficient
here.
* configure.in, libmisc/copydir.c: futimes() and lutimes() are not
standard. Check if they are implemented before using them. Do not
set the time of links if lutimes() does not exist, and use
utimes() as a replacement for futimes().
the list, not adduser. This fixes a segmentation fault for every
call of groupmems -d.
* libmisc/list.c: Add assertions to help identifying these issues.
* libmisc/list.c: Avoid implicit conversion of pointers to
booleans.
* src/userdel.c: Add log to syslog when the mail file could not be
removed.
* src/userdel.c: Give more context an error message (merge with
perror()).
* src/usermod.c: Harmonize some error messages.
* src/chage.c, src/chfn.c, src/chgpasswd.c, src/chpasswd.c,
src/chsh.c, src/gpasswd.c, src/groupadd.c, src/groupmems.c,
src/groupmod.c, src/grpck.c, src/grpconv.c, src/grpunconv.c,
src/passwd.c, src/pwck.c, src/pwconv.c, src/pwunconv.c,
src/useradd.c, src/userdel.c, src/usermod.c: Harmonize the error
message sent to stderr in case of *_update () failure.
* src/chage.c, src/chsh.c, src/groupadd.c, src/passwd.c: Do not
log to syslog when pw_update() or spw_update() fail.
* src/newusers.c: Do not log specific error message to stderr when
sgr_update() fails.
* src/pwconv.c: Remove duplicated definition of Prog.
src/newgrp.c, src/passwd.c, src/su.c: Use the same stderr and
syslog warnings when the username cannot be determined.
* src/newgrp.c: Reuse the same stderr message for groups which do
not exist in the system.
* src/grpconv.c, src/grpunconv.c, src/pwconv.c, src/pwunconv.c,
src/vipw.c: Open syslog with the right identification name.
* src/vipw.c: Log unlock errors to syslog.
* src/vipw.c: Log edits to syslog.
* src/chage.c, src/chfn.c, src/chsh.c, src/gpasswd.c,
src/groupadd.c, src/groupdel.c, src/groupmod.c, src/grpconv.c,
src/grpunconv.c, src/passwd.c, src/pwck.c, src/pwunconv.c,
src/useradd.c, src/usermod.c: Harmonize the syslog levels. Failure
to close or unlock are errors. Failure to open files are warnings.
support for long options --add (-a), --delete (-d),
--remove-password (-r), --restrict (-R), --administrators (-A),
and --members (-M)
* man/gpasswd.1.xml: Document the new long options.
* src/gpasswd.c: The sgrp structure is only used if SHADOWGRP is
defined.
files. Report errors to stderr and syslog, but continue.
* src/grpconv.c: Check failure to unlock files. Report errors to
stderr and syslog, but continue.
src/groupadd.c, src/groupdel.c, src/groupmems.c, src/groupmod.c,
src/grpconv.c, src/grpunconv.c, src/newusers.c, src/pwconv.c,
src/pwunconv.c, src/useradd.c, src/userdel.c: Harmonize the name
of the variables keeping the lock status, to match the shadow
library prefixes.
src/gpasswd.c, src/groupadd.c, src/groupdel.c, src/groupmems.c,
src/groupmod.c, src/grpck.c, src/grpconv.c, src/grpunconv.c,
src/newusers.c, src/passwd.c, src/pwck.c, src/pwconv.c,
src/pwunconv.c, src/useradd.c, src/userdel.c, src/usermod.c: In
case of a lock failure, indicate to the user that she can try
again later. Do not log to syslog.
the --lock an --unlock options do not lock or unlock the user
account anymore. They only lock or unlock the user's password.
* man/passwd.1.xml: Document above change. Document how an account
can be locked and what a password lock means.
* src/pwck.c: Report failure to unlock files to stderr and
syslog.
* src/pwck.c: Report failure to sort to stderr, and exit with
E_CANTSORT.
* man/pwck.8.xml: Document return code 6 (E_CANTSORT).
* src/groupmems.c: members() renamed display_members() to
avoid name clash with its members argument.
* src/groupmems.c: Report failure to unlock to syslog.
* src/groupmems.c: Harmonize error messages.
* src/groupmems.c: Report failures to write the new group file to
syslog (gr_close() failure).
* src/groupmems.c: Don't use fail_exit for non-failure exit.
* src/chsh.c: Use fail_exit() instead of exit(), this avoid
calling closelog() every times.
* src/chsh.c: Ignore the return value or pam_end().
* src/chsh.c: Simplify the PAM error handling.
* src/chsh.c: Report failure to unlock files to stderr and
syslog.
* src/chpasswd.c: Added support for syslog.
* src/chpasswd.c: Report failure to unlock files to stderr and
syslog.
* src/chpasswd.c: Simplify the PAM error handling.
* src/chpasswd.c: Report failure during *_close() to syslog.
* src/chpasswd.c: Ignore the return value or pam_end().
* src/chgpasswd.c: Added support for syslog.
* src/chgpasswd.c: Report failure to unlock files to stderr and
syslog.
* src/chgpasswd.c: Simplify the PAM error handling.
* src/chgpasswd.c: Report failure during *_close() to syslog.
* src/chgpasswd.c: Ignore the return value or pam_end().
gshadow to stderr.
* src/userdel.c: Fail in case of failure during the write of a
user or group database. Report errors to syslog.
* src/userdel.c: Do not unlock non locked files.
* src/userdel.c: Report failure to unlock the passwd or shadow
file to stderr and syslog.
file to stderr and syslog.
* src/newusers.c: In case of error when files are open or closed,
indicate the failing file.
* src/newusers.c: Do not try to unlock the files manually since
this is done in fail_exit.
locked. Report failures to unlock to stderr and syslog.
* src/chfn.c: Is case of failure, use fail_exit() rather than
exit().
* src/chfn.c: Ignore the return value of pam_end().
lib/sgroupio.c, lib/sgroupio.h, lib/shadowio.c, lib/shadowio.h:
Added *_dbname() functions to retrieve the name of the databases.
* lib/groupio.c, lib/groupio.h, lib/pwio.c, lib/pwio.h,
lib/sgroupio.c, lib/sgroupio.h, lib/shadowio.c, lib/shadowio.h:
*_name() functions renamed *setname().
* src/grpck.c, src/pwck.c: Likewise.
* lib/groupio.h, lib/pwio.h, lib/sgroupio.h, lib/shadowio.h: Added
the name of the arguments to the prototypes.
* src/chage, src/chfn.c, src/chgpasswd.c, src/chpasswd.c,
src/chsh.c, src/gpasswd.c, src/groupadd.c, src/groupdel.c,
src/groupmod.c, src/grpck.c, src/grpconv.c, src/grpunconv.c,
src/newusers.c, src/passwd.c, src/pwck.c, src/pwconv.c,
src/pwunconv.c, src/useradd.c, src/userdel.c, src/usermod.c:
Harmonize the erro & syslog messages in case of failure of the
*_lock(), *_open(), *_close(), *_unlock(), *_remove() functions.
* src/chgpasswd.c, src/chpasswd.c, src/usermod.c: Avoid
capitalized messages.
* src/chpasswd.c, src/useradd.c, src/usermod.c: Harmonize messages
in case of inexistent entries.
* src/usermod.c: Harmonize messages in case of already existing
entries.
* src/newusers.c, src/useradd.c: Simplify PAM error handling.
* src/useradd.c: Report failures to unlock files (stderr, syslog,
and audit). But do not fail (continue).
* src/useradd.c (open_files): Do not report to syslog & audit
failures to lock or open the databases. This might be harmless,
and the logs were not already informed that a change was
requested.
* src/usermod.c: It's not the account which is unlocked, but its
password.
group or gshadow files were previously locked.
* src/groupadd.c: Make sure failures are reported to syslog/audit
after the change is mentioned.
* src/groupmod.c: Add logging to syslog & audit on lock/unlock
failures.
* src/groupmod.c: Make sure issues are reported to syslog or audit
after the change is mentioned.
* src/groupdel.c: Only call gr_unlock() and sgr_unlock() in the
group or gshadow files were previously locked.
* src/groupdel.c: Simplify the handling of PAM errors.
src/groupmod.c, src/grpck.c, src/login.c, src/logoutd.c,
src/newgrp.c, src/newusers.c, src/passwd.c, src/pwck.c,
src/suauth.c, src/useradd.c, src/userdel.c, src/usermod.c,
src/vipw.c: Complete the switch from the `' quotation style to ''.
Do it also in SYSLOG messages. Quote some parameters. All this
permits to merge some messages.
* src/groupmems.c: Added Prog global variable to indicate the name
of the program in error messages.
2008-07-22 Lukáš Kuklínek <lkukline@redhat.com>
* NEWS, src/groupmems.c: Check if the user added to group actually
exist. RedHat bug #455603
* NEWS, src/groupmems.c: Check if the group exists in the group
local database (/etc/group). RedHat bug #456088
effects. This avoid checking if the user exists in the local passwd
file if not necessary, and thus allow to add LDAP users to local
groups. (The user is already checked against the system
configuration with getpwnam()). Thanks to Dan Kopecek.
update_faillog(). Report errors (but don't fail) if the file
exist, but open(), lseek(), read(), write(), or close() fails.
* src/usermod.c: Add brackets and parenthesis.
* src/usermod.c: Ignore the return value of pam_end() before
exiting.
* src/usermod.c: Ignore the return value of strftime(),
snprintf(), and puts().
* src/usermod.c: Check the return value of gmtime() and asctime(),
and output the raw time_t on failures.
booleans.
* libmisc/env.c: Add brackets and parenthesis.
* libmisc/env.c: Ignore the return value of puts() and fputs().
* libmisc/env.c: Avoid multi-statements lines.
booleans.
* libmisc/utmp.c: Add brackets and parenthesis.
* libmisc/utmp.c: Exit with the EXIT_FAILURE status code in case
of failure.
* libmisc/utmp.c: Avoid assignments in comparisons.
* lib/prototypes.h, libmisc/utmp.c: Change setutmp()'s prototype
to return an int because pututline() and pututxline() may fail.
* libmisc/limits.c: Avoid implicit conversion of pointers /
integers to booleans.
* libmisc/limits.c: Ignore the return value of umask(). We will
never return to the original umask.
* libmisc/limits.c: Avoid multi-statements lines.
* libmisc/limits.c: Added default to a switch(). Report invalid
limit strings to syslog.
* libmisc/limits.c: Ignore the return value of fclose().
/etc/limits is open read-only.
* libmisc/limits.c: Ignore the return value of fputs() and
sleep().
* libmisc/limits.c: Check the return value of nice() and
set_filesize_limit(), and report errors to syslog.
* libmisc/ulimit.c, lib/prototypes.h: Return failures of
set_filesize_limit(). Change the prototype to return an int
instead of void.
libmisc/find_new_uid.c, libmisc/Makefile.am, lib/prototypes.h:
Split find_new_ids.c into find_new_gid.c and find_new_uid.c to
ease the description of login.defs variables in the different
tools.
booleans.
* lib/defines.h: Ignore return values of setlocale() except the
first call.
* lib/defines.h: Fix a splint observer warning by using an
intermediate variable (old_locale).
reading or writing at an unspecified location. Log to syslog in
case of failure when reading a faillog entry or writing in
faillog or btmp.
* libmisc/failure.c: Check if the file exist before opening it.
* libmisc/failure.c: Log failures of open() and close() when
necessary.
* src/lastlog.c: umin and umax do not need to be signed long. Use
an unsigned long which might be needed to parse a GID or UID. Add
the has_umin and has_umax to replace the -1 values.
* src/lastlog.c: Cast dates to time_t.
* src/lastlog.c: Prefix lastlog errors with "lastlog: ".
value of spwd.sp_flag.
* lib/shadow.c: Add brackets.
* lib/shadow.c: Avoid implicit conversion of pointers to
booleans.
* lib/shadow.c: The size argument of fgets is an int, not a
size_t.
* lib/gshadow.c: Remove __setsgNIS() -never used).
* lib/gshadow.c: Avoid multi-statements lines.
* lib/gshadow.c: Avoid assignments in comparisons.
* lib/gshadow.c: ptr[nelem] is a string. Initialize it to NULL
instead of '\0'.
* lib/gshadow.c: Add brackets and parenthesis.
* lib/gshadow.c: The size argument of strncpy is a size_t and the
size argument of fgets is an int.
* lib/getdef.c: Added TODOs because of lack of error checking.
* lib/getdef.c: The size argument of fgets is an int, not a
size_t.
* lib/getdef.c: Avoid multi-statements lines.
* src/login.c: Use a %lu format and cast group and user IDs to
unsigned long integers.
* src/login.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
prototypes.
* src/chage.c: The ID argument of audit_logger is an unsigned
int. Use AUDIT_NO_ID instead of -1.
* src/chage.c: print_date() received a time_t.
* src/chage.c: Use SHADOW_SP_FLAG_UNSET for the initial
value of spwent.sp_flag.
unsigned long integers.
* src/pwck.c: Cast number of days to a long integer.
* src/pwck.c: Use the SCALE macro instead of (24L * 3600L)
for the values to be set in /etc/shadow.
* src/pwck.c: Use SHADOW_SP_FLAG_UNSET for the initial
value of spent.sp_flag.
int. Use AUDIT_NO_ID instead of -1.
* src/groupmod.c: Use a %lu format and cast group and user IDs to
unsigned long integers.
* src/groupmod.c: Cast the parsed GID/UID to a gid_t/uid_t.
int. Use AUDIT_NO_ID instead of -1.
* src/useradd.c: Cast the parsed GID/UID to a gid_t/uid_t.
* src/useradd.c: The size argument of fgets is an int, not a
size_t.
* src/useradd.c: Cast number of days to a long integer.
* src/useradd.c: Use SHADOW_SP_FLAG_UNSET for the initial
value of spent.sp_flag.
* src/useradd.c: Use a %lu format and cast group and user IDs to
unsigned long integers.
* src/newusers.c: Comment why we use both getgrgid() and
gr_locate_gid().
* src/newusers.c: Cast the parsed GID/UID to a gid_t/uid_t.
* src/newusers.c: Cast the number of days to a long integer.
* src/newusers.c: Use SHADOW_SP_FLAG_UNSET for the initial
value of spent.sp_flag.
* src/newusers.c: The size argument of fgets is an int, not a
size_t.
long integer.
* src/usermod.c: Cast UIDs and GIDs to uid_t and gid_t after
checking the ranges.
* src/usermod.c: The ID argument of audit_logger is an unsigned
int.
* src/usermod.c: read() returns a ssize_t.
* src/usermod.c: Cast the return value of malloc and make sure it
receives a size_t.
int.
* src/gpasswd.c: Ignore the return value of signal(). The signal
handlers are only changed for the last steps of gpasswd, and there
is no need to restore them.
unsigned long integers.
* src/newgrp.c: The ID argument of audit_logger is an unsigned
int.
* src/newgrp.c: Ignore the return value of signal() (the signal
handlers are assumed to be the default one and are restored
later).
* src/newgrp.c: Do not checl if a pid_t is < 0, check if equal
to (pid_t)-1.
prototypes.
* libmisc/copydir.c: Use a size_t for the length of strings.
* libmisc/copydir.c: Cast the return value of malloc().
* libmisc/copydir.c: The size argument of write() is a size_t.
might be defined in this header file.
* lib/defines.h: Prefer checking if HAVE_LOCALE_H or ENABLE_NLS
are defined (rather than set to non 0).
* lib/defines.h: The dummy implementations of bindtextdomain() and
textdomain() should return a pointer. Return NULL instead of
/* empty */
* lib/defines.h: Define SHADOW_SP_FLAG_UNSET, to be used for the
initialization of sp_flag field of the shadow structures.
* lib/defines.h: Define LC_ALL, needed even if HAVE_LOCALE_H is
not defined.
* libmisc/log.c: Add brackets and parenthesis.
* libmisc/log.c: read() returns a ssize_t (note size_t).
* libmisc/log.c: Avoid implicit conversion of pointers to
booleans.
* libmisc/log.c: Ignore return value of time() when use with a
non NULL argument.
* libmisc/age.c: Avoid implicit conversion of pointers to
booleans.
* libmisc/age.c: Avoid assignments in comparisons.
* libmisc/age.c: Ignore the return value of printf(), puts(),
fputs() and fflush().
* libmisc/age.c: Add brackets and parenthesis.
* libmisc/age.c: Cast the return value of time() to long and
converted to a date.
Propagate this time to the callers (the get_remote_string() and
do_rlogin() functions).
* libmisc/rlogin.c: Add brackets and parenthesis.
* libmisc/rlogin.c: Avoid multi-statements lines.
* libmisc/rlogin.c: Avoid assignments in comparisons.
* libmisc/rlogin.c: Avoid implicit conversion of pointers to
booleans.
* libmisc/failure.c: read() returns a ssize_t.
* libmisc/failure.c: Add brackets and parenthesis.
* libmisc/failure.c: Ignore return value of time() when use with a
non NULL argument.
libmisc/loginprompt.c, libmisc/ttytype.c, libmisc/tz.c,
src/login_nopam.c, src/chpasswd.c, src/chgpasswd.c, lib/port.c:
The size argument of fgets is an int, not a size_t.
* libmisc/loginprompt.c: Ignore the return value from signal()
when the signal handlers are restored.
* src/chpasswd.c: Cast the return value of time() to a long
integer.
* src/chpasswd.c: Use the SCALE macro instead of (24L * 3600L)
for the values to be set in /etc/shadow.
* src/su.c: Add brackets and parenthesis.
* src/su.c: Avoid implicit conversion of pointers / integers
/ chars to booleans.
* src/su.c: Ignore the return value of pam_end() before
exiting.
* src/su.c: Avoid assignments in comparisons.
* src/su.c: Avoid multi-statements lines.
* lib/nscd.c: Always warn when the nscd cache cannot be flushed.
* lib/nscd.c: Avoid assignments in comparisons.
* lib/nscd.c: Ignore the return value of fputs() when printing
errors.
* lib/port.c: Change isttytime() prototype to return a bool.
* lib/port.c: Ignore the return value of fclose () (file open
read-only).
* lib/port.c: Avoid multi-statements lines.
and printf().
* src/id.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/id.c: Add brackets and parenthesis.
* src/id.c: Avoid implicit conversion of pointers / integers
to booleans.
* src/chsh.c: restricted_shell() renamed is_restricted_shell().
check_shell() renamed shell_is_listed().
* src/chsh.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/chsh.c: Avoid implicit conversion of pointers / integers
to booleans.
* src/chsh.c: Ignore the return value of pam_end() before
exiting.
integers.
* src/grpunconv.c: Add brackets and parenthesis.
* src/grpunconv.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/grpunconv.c: Avoid implicit conversion of pointers / integers
to booleans.
bindtextdomain(), and textdomain().
* src/sulogin.c: Avoid implicit conversion of pointers / integers
/ chars to booleans.
* src/sulogin.c: Avoid assignments in comparisons.
* src/sulogin.c: Ignore the return value of alarm().
* src/groups.c: Add brackets and parenthesis.
* src/groups.c: Avoid implicit conversion of pointers / integers
to booleans.
* src/groups.c: Avoid assignments in comparisons.
* src/groups.c: Ignore the return value of putchar(), printf()
* src/groups.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/grpconv.c: Add brackets and parenthesis.
* src/grpconv.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/grpconv.c: Avoid implicit conversion of pointers / integers
to booleans.
* src/faillog.c: Avoid implicit conversion of pointers / integers
/ chars to booleans.
* src/faillog.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/faillog.c: Add brackets and parenthesis.
* src/login.c: Ignore the return value of pam_end() before
exiting.
* src/login.c: Use a bool when possible instead of int integers.
* src/login.c: Add brackets and parenthesis.
* src/login.c: Ignore the return values of fflush(), putchar(), puts().
* src/login.c: Ignore the return value of fclose() for read-only
files.
* src/login.c: Avoid assignments in comparisons.
* src/login.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
integers.
* src/groupadd.c: Add brackets and parenthesis.
* src/groupadd.c: Avoid implicit conversion of pointers / integers
/ chars to booleans.
* src/groupadd.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/groupadd.c: Ignore the return value of pam_end() before
exiting.
* src/passwd.c: Avoid assignments in comparisons.
* src/passwd.c: Add brackets and parenthesis.
* src/passwd.c: Avoid implicit conversion of pointers / integers /
chars to booleans.
* src/passwd.c: Move the "context_t c" declaration at the
beginning check_selinux_access.
* src/passwd.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
integers.
* src/groupmod.c: Avoid assignments in comparisons.
* src/groupmod.c: Add brackets and parenthesis.
* src/groupmod.c: Avoid implicit conversion of pointers / integers
/ chars to booleans.
* src/groupmod.c: Use a %lu format to print GIDs, and cast the GID
to (unsigned long int).
* src/groupmod.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/groupmod.c: Ignore the return value of pam_end() before
exiting.
* src/useradd.c: Avoid implicit conversion of pointers / integers
/ chars to booleans.
* src/useradd.c: Add brackets and parenthesis.
* src/useradd.c: Avoid assignments in comparisons.
* src/useradd.c: Ignore the return value of fclose() for read-only
files.
* src/useradd.c: Ignore the return value of fflush() before
closing the files.
* src/useradd.c: Avoid multi-statements lines.
* src/useradd.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/useradd.c: Ignore the return value of pam_end() before
exiting.
* src/vipw.c: Ignore the return value of umask(), when the mask is
set again to the old value.
* src/vipw.c: Avoid implicit conversion of pointers / integers to
booleans.
* src/vipw.c: Add brackets and parenthesis.
* src/vipw.c: Avoid assignments in comparisons.
* src/vipw.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/vipw.c: Add missing termination of the longopts parameter
for getopt_long().
integers.
* src/chgpasswd.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/chgpasswd.c: Avoid implicit conversion of integers to
booleans.
integers.
* src/groupdel.c: Avoid implicit conversion of pointers / integers to
booleans.
* src/groupdel.c: Avoid assignments in comparisons.
* src/groupdel.c: Ignore the return value of pam_end() before
exiting.
* src/groupdel.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
bindtextdomain(), and textdomain().
* src/expiry.c: Add brackets and parenthesis.
* src/expiry.c: Avoid assignments in comparisons.
* src/expiry.c: Avoid implicit conversion of pointers to booleans.
* src/usermod.c: Add brackets and parenthesis.
* src/usermod.c: Avoid implicit conversion of pointers / integers
/ chars to booleans.
* src/usermod.c: Avoid assignments in comparisons.
* src/usermod.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/usermod.c: Ignore the return value of pam_end() before
exiting.
long_options before the blocks of code.
* src/groupmems.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/groupmems.c: Ignore the return value of pam_end() before
exiting.
* src/chfn.c: Avoid implicit conversion of integers / chars to
booleans.
* src/chfn.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/logoutd.c: Avoid implicit conversion of pointers / integers
/ chars to booleans.
* src/logoutd.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/logoutd.c: Add brackets and parenthesis.
integers.
* src/chpasswd.c: Avoid implicit conversion of pointers / integers
/ chars to booleans.
* src/chpasswd.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/pwconv.c: Add brackets and parenthesis.
* src/pwconv.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/pwconv.c: Avoid implicit conversion of pointers / integers /
chars to booleans.
* src/newusers.c: Use a bool when possible instead of int
integers.
* src/newusers.c: Avoid implicit conversion of pointers / integers
/ chars to booleans.
* src/newusers.c: Ignore the return value of pam_end() before
exiting.
* src/newusers.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/newusers.c: Avoid multi-statements lines.
* src/newusers.c: Add brackets and parenthesis.
* src/gpasswd.c: Avoid implicit conversion of pointers / integers
/ chars to booleans.
* src/gpasswd.c: Ignore the return value of putchar() and fflush()
before exiting.
* src/gpasswd.c: check_list() renamed is_valid_user_list(), and
return a bool.
* src/gpasswd.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/lastlog.c: Avoid implicit conversion of pointers / integers
/ chars to booleans.
* src/lastlog.c: Add brackets and parenthesis.
* src/lastlog.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
deleted_user_group, was_member, was_admin, and the
options' flags.
* src/userdel.c: Change path_prefix() prototype to return a bool.
* src/userdel.c: Ignore return value of setlocale(),
bindtextdomain(), and textdomain().
* src/userdel.c: Ignore the return value from pam_end() since we
are exiting anyway just afterwards.
* src/userdel.c: Avoid implicit conversion of pointers /
integers / chars to booleans.
* src/userdel.c: Add brackets and parenthesis.
* src/userdel.c: Avoid assignments in comparisons.
* src/userdel.c: Do not ignore the return value of the *_unlock()
functions.
booleans true and false instead. Change the prototypes of
list_match(), user_match(), from_match(), and string_match()
accordingly. Also use booleans internally.
* src/login_nopam.c: Add brackets and parenthesis.
* src/login_nopam.c: Avoid implicit conversion of pointers /
integers / chars to booleans.
* src/login_nopam.c: Avoid assignments in comparisons.
The default parameter should also be a bool.
* libmisc/console.c: Add brackets and parenthesis.
* libmisc/console.c: Avoid assignments in comparisons.
* libmisc/console.c: Change console() prototype to return a bool.
* lib/sgroupio.c: Add brackets.
* lib/sgroupio.c: Avoid implicit conversion of pointers / integers to booleans.
* lib/sgroupio.c: The changed, isopen, locked, and readonly fields of the db are booleans.
* lib/sgroupio.h, lib/sgroupio.c: sgr_file_present returns a bool.
* lib/sgroupio.h: Add protection against multiple inclusions.
* lib/sgroupio.c: Add brackets.
* lib/sgroupio.c: Avoid implicit conversion of pointers / integers to booleans.
* lib/sgroupio.c: The changed, isopen, locked, and readonly fields of the db are booleans.
* lib/sgroupio.h, lib/sgroupio.c: sgr_file_present returns a bool.
* lib/sgroupio.h: Add protection against multiple inclusions.
* lib/port.c: Avoid multiple statement on the same line.
* lib/port.c: Add brackets and parenthesis.
* lib/port.c: Avoid assignments in comparisons.
* lib/port.c: Fix typo comparision -> comparison (in comment).
* lib/commonio.h: Include defines.h to get the definition of bool.
* lib/commonio.h: commonio_present returns a bool
* lib/commonio.c: Implement above changes.
* lib/commonio.c: add argument names in prototypes.
* lib/commonio.c: name_is_nis returns a bool.
* lib/commonio.c: nscd_need_reload is a bool.
* lib/commonio.c: Improve types (use size_t / pid_t when needed instead of int).
* lib/commonio.c: Avoid assignments in comparisons.
* lib/commonio.c: Add brackets and parenthesis.
* lib/commonio.c: Avoid implicit conversion of pointers / integers to booleans
* lib/commonio.c: The return values of utime is not checked on purpose.
* libmisc/ttytype.c: Avoid assignments in comparisons.
* libmisc/ttytype.c: Add brackets and parenthesis.
* libmisc/ttytype.c: The return values of fclose is not checked on purpose.
* libmisc/loginprompt.c: Add brackets.
* libmisc/loginprompt.c: Avoid assignments in comparisons.
* libmisc/loginprompt.c: The return values of fclose and fflush are not checked on purpose.
* Avoid assignments in comparisons.
* (hushed) Change type of found to bool.
* Add brackets.
* Always check if the user or the shell is in
the file. Do not check the first character of the line first. This
is simpler and match better with the HUSHLOGIN_FILE documentation.
check_user_name) renamed to is_valid_user_name (resp.
is_valid_group_name). is_valid_user_name and is_valid_group_name
return a bool.
* src/grpck.c, src/newusers.c, src/usermod.c, src/useradd.c,
src/groupmod.c, src/pwck.c, src/groupadd.c: Use is_valid_user_name
and is_valid_group_name, following above change.
* libmisc/chkname.c: Avoid implicit conversion of chars to
booleans. Add brackets and parenthesis.
externinterrno;/* warning: ANSI C forbids an empty source file */
#endif
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