New upstream version 4.15.1
This commit is contained in:
Chris Hofstaedtler
+285
@@ -0,0 +1,285 @@
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/*
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* SPDX-FileCopyrightText: 1989 - 1994, Julianne Frances Haugh
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* SPDX-FileCopyrightText: 1996 - 2000, Marek Michałkiewicz
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* SPDX-FileCopyrightText: 2001 - 2006, Tomasz Kłoczko
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* SPDX-FileCopyrightText: 2007 - 2010, Nicolas François
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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/*
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* Separated from setup.c. --marekm
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*/
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#include <config.h>
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#ident "$Id$"
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#include <assert.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <stdio.h>
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#include <ctype.h>
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#include "alloc.h"
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#include "prototypes.h"
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#include "defines.h"
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#include <pwd.h>
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#include "getdef.h"
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#include "shadowlog.h"
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#include "string/sprintf.h"
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#ifndef USE_PAM
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static void
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addenv_path(const char *varname, const char *dirname, const char *filename)
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{
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char *buf;
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xasprintf(&buf, "%s/%s", dirname, filename);
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addenv(varname, buf);
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free(buf);
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}
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static void read_env_file (const char *filename)
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{
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FILE *fp;
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char buf[1024];
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char *cp, *name, *val;
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fp = fopen (filename, "r");
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if (NULL == fp) {
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return;
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}
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while (fgets (buf, (int)(sizeof buf), fp) == buf) {
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cp = strrchr (buf, '\n');
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if (NULL == cp) {
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break;
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}
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*cp = '\0';
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cp = buf;
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/* ignore whitespace and comments */
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while (isspace (*cp)) {
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cp++;
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}
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if (('\0' == *cp) || ('#' == *cp)) {
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continue;
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}
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/*
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* ignore lines which don't follow the name=value format
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* (for example, the "export NAME" shell commands)
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*/
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name = cp;
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while (('\0' != *cp) && !isspace (*cp) && ('=' != *cp)) {
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cp++;
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}
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if ('=' != *cp) {
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continue;
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}
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/* NUL-terminate the name */
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*cp = '\0';
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cp++;
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val = cp;
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#if 0 /* XXX untested, and needs rewrite with fewer goto's :-) */
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/*
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(state, char_type) -> (state, action)
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state: unquoted, single_quoted, double_quoted, escaped, double_quoted_escaped
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char_type: normal, white, backslash, single, double
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action: remove_curr, remove_curr_skip_next, remove_prev, finish XXX
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*/
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no_quote:
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if (*cp == '\\') {
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/* remove the backslash */
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remove_char (cp);
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/* skip over the next character */
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if (*cp)
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cp++;
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goto no_quote;
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} else if (*cp == '\'') {
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/* remove the quote */
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remove_char (cp);
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/* now within single quotes */
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goto s_quote;
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} else if (*cp == '"') {
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/* remove the quote */
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remove_char (cp);
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/* now within double quotes */
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goto d_quote;
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} else if (*cp == '\0') {
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/* end of string */
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goto finished;
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} else if (isspace (*cp)) {
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/* unescaped whitespace - end of string */
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*cp = '\0';
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goto finished;
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} else {
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cp++;
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goto no_quote;
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}
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s_quote:
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if (*cp == '\'') {
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/* remove the quote */
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remove_char (cp);
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/* unquoted again */
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goto no_quote;
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} else if (*cp == '\0') {
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/* end of string */
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goto finished;
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} else {
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/* preserve everything within single quotes */
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cp++;
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goto s_quote;
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}
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d_quote:
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if (*cp == '\"') {
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/* remove the quote */
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remove_char (cp);
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/* unquoted again */
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goto no_quote;
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} else if (*cp == '\\') {
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cp++;
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/* if backslash followed by double quote, remove backslash
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else skip over the backslash and following char */
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if (*cp == '"')
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remove_char (cp - 1);
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else if (*cp)
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cp++;
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goto d_quote;
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}
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else if (*cp == '\0') {
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/* end of string */
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goto finished;
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} else {
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/* preserve everything within double quotes */
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goto d_quote;
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}
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finished:
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#endif /* 0 */
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/*
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* XXX - should handle quotes, backslash escapes, etc.
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* like the shell does.
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*/
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addenv (name, val);
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}
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(void) fclose (fp);
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}
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#endif /* USE_PAM */
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/*
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* change to the user's home directory
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* set the HOME, SHELL, MAIL, PATH, and LOGNAME or USER environmental
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* variables.
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*/
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void setup_env (struct passwd *info)
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{
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#ifndef USE_PAM
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const char *envf;
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#endif
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const char *cp;
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/*
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* Change the current working directory to be the home directory
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* of the user. It is a fatal error for this process to be unable
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* to change to that directory. There is no "default" home
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* directory.
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*
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* We no longer do it as root - should work better on NFS-mounted
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* home directories. Some systems default to HOME=/, so we make
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* this a configurable option. --marekm
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*/
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if (chdir (info->pw_dir) == -1) {
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if (!getdef_bool ("DEFAULT_HOME") || chdir ("/") == -1) {
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fprintf (log_get_logfd(), _("Unable to cd to '%s'\n"),
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info->pw_dir);
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SYSLOG ((LOG_WARN,
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"unable to cd to `%s' for user `%s'\n",
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info->pw_dir, info->pw_name));
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closelog ();
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exit (EXIT_FAILURE);
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}
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(void) puts (_("No directory, logging in with HOME=/"));
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free (info->pw_dir);
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info->pw_dir = xstrdup ("/");
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}
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/*
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* Create the HOME environmental variable and export it.
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*/
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addenv ("HOME", info->pw_dir);
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/*
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* Create the SHELL environmental variable and export it.
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*/
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if ((NULL == info->pw_shell) || ('\0' == *info->pw_shell)) {
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free (info->pw_shell);
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info->pw_shell = xstrdup (SHELL);
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}
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addenv ("SHELL", info->pw_shell);
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/*
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* Export the user name. For BSD derived systems, it's "USER", for
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* all others it's "LOGNAME". We set both of them.
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*/
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addenv ("USER", info->pw_name);
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addenv ("LOGNAME", info->pw_name);
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/*
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* Create the PATH environmental variable and export it.
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*/
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cp = getdef_str ((info->pw_uid == 0) ? "ENV_SUPATH" : "ENV_PATH");
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if (NULL == cp) {
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/* not specified, use a minimal default */
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addenv ((info->pw_uid == 0) ? "PATH=/sbin:/bin:/usr/sbin:/usr/bin" : "PATH=/bin:/usr/bin", NULL);
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} else if (strchr (cp, '=')) {
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/* specified as name=value (PATH=...) */
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addenv (cp, NULL);
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} else {
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/* only value specified without "PATH=" */
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addenv ("PATH", cp);
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}
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#ifndef USE_PAM
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/*
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* Create the MAIL environmental variable and export it. login.defs
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* knows the prefix.
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*/
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if (getdef_bool ("MAIL_CHECK_ENAB")) {
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cp = getdef_str ("MAIL_DIR");
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if (NULL != cp) {
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addenv_path ("MAIL", cp, info->pw_name);
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} else {
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cp = getdef_str ("MAIL_FILE");
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if (NULL != cp) {
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addenv_path ("MAIL", info->pw_dir, cp);
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} else {
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#if defined(MAIL_SPOOL_FILE)
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addenv_path ("MAIL", info->pw_dir, MAIL_SPOOL_FILE);
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#elif defined(MAIL_SPOOL_DIR)
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addenv_path ("MAIL", MAIL_SPOOL_DIR, info->pw_name);
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#endif
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}
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}
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}
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/*
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* Read environment from optional config file. --marekm
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*/
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envf = getdef_str ("ENVIRON_FILE");
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if (NULL != envf) {
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read_env_file (envf);
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}
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#endif /* !USE_PAM */
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}
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