/*
- * Copyright 1990 - 1994, Julianne Frances Haugh
+ * Copyright (c) 1990 - 1994, Julianne Frances Haugh
+ * Copyright (c) 1996 - 2000, Marek Michałkiewicz
+ * Copyright (c) 2001 - 2006, Tomasz Kłoczko
+ * Copyright (c) 2007 - 2009, Nicolas François
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
- * 3. Neither the name of Julianne F. Haugh nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
+ * 3. The name of the copyright holders or contributors may not be used to
+ * endorse or promote products derived from this software without
+ * specific prior written permission.
*
- * THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL JULIE HAUGH OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <config.h>
#include <errno.h>
#include <fcntl.h>
+#include <getopt.h>
#include <grp.h>
#include <pwd.h>
#include <signal.h>
#include <stdio.h>
#include <sys/types.h>
#include "defines.h"
-#include "exitcodes.h"
#include "groupio.h"
#include "nscd.h"
#include "prototypes.h"
-#ifdef SHADOWGRP
+#ifdef SHADOWGRP
#include "sgroupio.h"
#endif
+/*@-exitarg@*/
+#include "exitcodes.h"
+
/*
* Global variables
*/
-static char *Prog;
+/* The name of this command, as it is invoked */
+char *Prog;
#ifdef SHADOWGRP
-static int is_shadowgrp;
+/* Indicate if shadow groups are enabled on the system
+ * (/etc/gshadow present) */
+static bool is_shadowgrp;
#endif
-static int
- aflg = 0, Aflg = 0, dflg = 0, Mflg = 0, rflg = 0, Rflg = 0;
-
-unsigned int bywho = -1;
+/* Flags set by options */
+static bool aflg = false;
+static bool Aflg = false;
+static bool dflg = false;
+static bool Mflg = false;
+static bool rflg = false;
+static bool Rflg = false;
+/* The name of the group that is being affected */
+static char *group = NULL;
+/* The name of the user being added (-a) or removed (-d) from group */
+static char *user = NULL;
+/* The new list of members set with -M */
+static char *members = NULL;
+#ifdef SHADOWGRP
+/* The new list of group administrators set with -A */
+static char *admins = NULL;
+#endif
+/* The name of the caller */
+static char *myname = NULL;
+/* The UID of the caller */
+static uid_t bywho;
+/* Indicate if gpasswd was called by root */
+#define amroot (0 == bywho)
+/* The number of retries for th user to provide and repeat a new password */
#ifndef RETRIES
#define RETRIES 3
#endif
/* local function prototypes */
-static void usage (void);
-static RETSIGTYPE catch_signals (int);
-static int check_list (const char *);
+static void usage (int status);
+static RETSIGTYPE catch_signals (int killed);
+static bool is_valid_user_list (const char *users);
+static void process_flags (int argc, char **argv);
+static void check_flags (int argc, int opt_index);
+static void open_files (void);
+static void close_files (void);
+#ifdef SHADOWGRP
+static void get_group (struct group *gr, struct sgrp *sg);
+static void check_perms (const struct group *gr, const struct sgrp *sg);
+static void update_group (struct group *gr, struct sgrp *sg);
+static void change_passwd (struct group *gr, struct sgrp *sg);
+#else
+static void get_group (struct group *gr);
+static void check_perms (const struct group *gr);
+static void update_group (struct group *gr);
+static void change_passwd (struct group *gr);
+#endif
+static void log_gpasswd_failure (const char *suffix);
+static void log_gpasswd_failure_system (unused void *arg);
+static void log_gpasswd_failure_group (unused void *arg);
+#ifdef SHADOWGRP
+static void log_gpasswd_failure_gshadow (unused void *arg);
+#endif
+static void log_gpasswd_success (const char *suffix);
+static void log_gpasswd_success_system (unused void *arg);
+static void log_gpasswd_success_group (unused void *arg);
+#ifdef SHADOWGRP
+static void log_gpasswd_success_gshadow (unused void *arg);
+#endif
/*
* usage - display usage message
*/
-static void usage (void)
+static void usage (int status)
{
- fprintf (stderr, _("Usage: %s [-r|-R] group\n"), Prog);
- fprintf (stderr, _(" %s [-a user] group\n"), Prog);
- fprintf (stderr, _(" %s [-d user] group\n"), Prog);
-#ifdef SHADOWGRP
- fprintf (stderr,
- _(" %s [-A user,...] [-M user,...] group\n"), Prog);
+ FILE *usageout = (E_SUCCESS != status) ? stderr : stdout;
+ (void) fprintf (usageout,
+ _("Usage: %s [option] GROUP\n"
+ "\n"
+ "Options:\n"),
+ Prog);
+ (void) fputs (_(" -a, --add USER add USER to GROUP\n"), usageout);
+ (void) fputs (_(" -d, --delete USER remove USER from GROUP\n"), usageout);
+ (void) fputs (_(" -h, --help display this help message and exit\n"), usageout);
+ (void) fputs (_(" -r, --remove-password remove the GROUP's password\n"), usageout);
+ (void) fputs (_(" -R, --restrict restrict access to GROUP to its members\n"), usageout);
+ (void) fputs (_(" -M, --members USER,... set the list of members of GROUP\n"), usageout);
+#ifdef SHADOWGRP
+ (void) fputs (_(" -A, --administrators ADMIN,...\n"
+ " set the list of administrators for GROUP\n"), usageout);
+ (void) fputs (_("Except for the -A and -M options, the options cannot be combined.\n"), usageout);
#else
- fprintf (stderr, _(" %s [-M user,...] group\n"), Prog);
+ (void) fputs (_("The options cannot be combined.\n"), usageout);
#endif
- exit (E_USAGE);
+ exit (status);
}
/*
{
static TERMIO sgtty;
- if (killed)
+ if (0 != killed) {
STTY (0, &sgtty);
- else
+ } else {
GTTY (0, &sgtty);
+ }
- if (killed) {
- putchar ('\n');
- fflush (stdout);
+ if (0 != killed) {
+ (void) putchar ('\n');
+ (void) fflush (stdout);
exit (killed);
}
}
/*
- * check_list - check a comma-separated list of user names for validity
+ * is_valid_user_list - check a comma-separated list of user names for validity
+ *
+ * is_valid_user_list scans a comma-separated list of user names and
+ * checks that each listed name exists is the user database.
*
- * check_list scans a comma-separated list of user names and checks
- * that each listed name exists.
+ * It returns true if the list of users is valid.
*/
-static int check_list (const char *users)
+static bool is_valid_user_list (const char *users)
{
- const char *start, *end;
- char username[32];
- int errors = 0;
- size_t len;
-
- for (start = users; start && *start; start = end) {
- if ((end = strchr (start, ','))) {
- len = end - start;
+ char *username, *end;
+ bool is_valid = true;
+ char *tmpusers = xstrdup (users);
+
+ for (username = tmpusers;
+ (NULL != username) && ('\0' != *username);
+ username = end) {
+ end = strchr (username, ',');
+ if (NULL != end) {
+ *end = '\0';
end++;
- } else {
- len = strlen (start);
}
- if (len > sizeof (username) - 1)
- len = sizeof (username) - 1;
- strncpy (username, start, len);
- username[len] = '\0';
-
/*
* This user must exist.
*/
- if (!getpwnam (username)) { /* local, no need for xgetpwnam */
- fprintf (stderr, _("%s: unknown user %s\n"),
- Prog, username);
- errors++;
+ /* local, no need for xgetpwnam */
+ if (getpwnam (username) == NULL) {
+ fprintf (stderr, _("%s: user '%s' does not exist\n"),
+ Prog, username);
+ is_valid = false;
+ }
+ }
+
+ free (tmpusers);
+
+ return is_valid;
+}
+
+static void failure (void)
+{
+ fprintf (stderr, _("%s: Permission denied.\n"), Prog);
+ log_gpasswd_failure (": Permission denied");
+ exit (E_NOPERM);
+}
+
+/*
+ * process_flags - process the command line options and arguments
+ */
+static void process_flags (int argc, char **argv)
+{
+ int flag;
+ int option_index = 0;
+ static struct option long_options[] = {
+ {"add", required_argument, NULL, 'a'},
+ {"delete", required_argument, NULL, 'd'},
+ {"help", no_argument, NULL, 'h'},
+ {"remove-password", no_argument, NULL, 'r'},
+ {"restrict", no_argument, NULL, 'R'},
+ {"administrators", required_argument, NULL, 'A'},
+ {"members", required_argument, NULL, 'M'},
+ {NULL, 0, NULL, '\0'}
+ };
+
+ while ((flag = getopt_long (argc, argv, "a:A:d:ghM:rR", long_options, &option_index)) != -1) {
+ switch (flag) {
+ case 'a': /* add a user */
+ aflg = true;
+ user = optarg;
+ /* local, no need for xgetpwnam */
+ if (getpwnam (user) == NULL) {
+ fprintf (stderr,
+ _("%s: user '%s' does not exist\n"),
+ Prog, user);
+ exit (E_BAD_ARG);
+ }
+ break;
+#ifdef SHADOWGRP
+ case 'A': /* set the list of administrators */
+ if (!is_shadowgrp) {
+ fprintf (stderr,
+ _("%s: shadow group passwords required for -A\n"),
+ Prog);
+ exit (E_GSHADOW_NOTFOUND);
+ }
+ admins = optarg;
+ if (!is_valid_user_list (admins)) {
+ exit (E_BAD_ARG);
+ }
+ Aflg = true;
+ break;
+#endif /* SHADOWGRP */
+ case 'd': /* delete a user */
+ dflg = true;
+ user = optarg;
+ break;
+ case 'g': /* no-op from normal password */
+ break;
+ case 'h':
+ usage (E_SUCCESS);
+ break;
+ case 'M': /* set the list of members */
+ members = optarg;
+ if (!is_valid_user_list (members)) {
+ exit (E_BAD_ARG);
+ }
+ Mflg = true;
+ break;
+ case 'r': /* remove group password */
+ rflg = true;
+ break;
+ case 'R': /* restrict group password */
+ Rflg = true;
+ break;
+ default:
+ usage (E_USAGE);
+ }
+ }
+
+ /* Get the name of the group that is being affected. */
+ group = argv[optind];
+
+ check_flags (argc, optind);
+}
+
+/*
+ * check_flags - check the validity of options
+ */
+static void check_flags (int argc, int opt_index)
+{
+ int exclusive = 0;
+ /*
+ * Make sure exclusive flags are exclusive
+ */
+ if (aflg) {
+ exclusive++;
+ }
+ if (dflg) {
+ exclusive++;
+ }
+ if (rflg) {
+ exclusive++;
+ }
+ if (Rflg) {
+ exclusive++;
+ }
+ if (Aflg || Mflg) {
+ exclusive++;
+ }
+ if (exclusive > 1) {
+ usage (E_USAGE);
+ }
+
+ /*
+ * Make sure one (and only one) group was provided
+ */
+ if ((argc != (opt_index+1)) || (NULL == group)) {
+ usage (E_USAGE);
+ }
+}
+
+/*
+ * open_files - lock and open the group databases
+ *
+ * It will call exit in case of error.
+ */
+static void open_files (void)
+{
+ if (gr_lock () == 0) {
+ fprintf (stderr,
+ _("%s: cannot lock %s; try again later.\n"),
+ Prog, gr_dbname ());
+ exit (E_NOPERM);
+ }
+ add_cleanup (cleanup_unlock_group, NULL);
+
+#ifdef SHADOWGRP
+ if (is_shadowgrp) {
+ if (sgr_lock () == 0) {
+ fprintf (stderr,
+ _("%s: cannot lock %s; try again later.\n"),
+ Prog, sgr_dbname ());
+ exit (E_NOPERM);
+ }
+ add_cleanup (cleanup_unlock_gshadow, NULL);
+ }
+#endif /* SHADOWGRP */
+
+ add_cleanup (log_gpasswd_failure_system, NULL);
+
+ if (gr_open (O_RDWR) == 0) {
+ fprintf (stderr,
+ _("%s: cannot open %s\n"),
+ Prog, gr_dbname ());
+ SYSLOG ((LOG_WARN, "cannot open %s", gr_dbname ()));
+ exit (E_NOPERM);
+ }
+
+#ifdef SHADOWGRP
+ if (is_shadowgrp) {
+ if (sgr_open (O_RDWR) == 0) {
+ fprintf (stderr,
+ _("%s: cannot open %s\n"),
+ Prog, sgr_dbname ());
+ SYSLOG ((LOG_WARN, "cannot open %s", sgr_dbname ()));
+ exit (E_NOPERM);
+ }
+ add_cleanup (log_gpasswd_failure_gshadow, NULL);
+ }
+#endif /* SHADOWGRP */
+
+ add_cleanup (log_gpasswd_failure_group, NULL);
+ del_cleanup (log_gpasswd_failure_system);
+}
+
+static void log_gpasswd_failure (const char *suffix)
+{
+#ifdef WITH_AUDIT
+ char buf[1024];
+#endif
+ if (aflg) {
+ SYSLOG ((LOG_ERR,
+ "%s failed to add user %s to group %s%s",
+ myname, user, group, suffix));
+#ifdef WITH_AUDIT
+ snprintf (buf, 1023,
+ "%s failed to add user %s to group %s%s",
+ myname, user, group, suffix);
+ buf[1023] = '\0';
+ audit_logger (AUDIT_USER_ACCT, Prog,
+ buf,
+ group, AUDIT_NO_ID,
+ SHADOW_AUDIT_FAILURE);
+#endif
+ } else if (dflg) {
+ SYSLOG ((LOG_ERR,
+ "%s failed to remove user %s from group %s%s",
+ myname, user, group, suffix));
+#ifdef WITH_AUDIT
+ snprintf (buf, 1023,
+ "%s failed to remove user %s from group %s%s",
+ myname, user, group, suffix);
+ buf[1023] = '\0';
+ audit_logger (AUDIT_USER_ACCT, Prog,
+ buf,
+ group, AUDIT_NO_ID,
+ SHADOW_AUDIT_FAILURE);
+#endif
+ } else if (rflg) {
+ SYSLOG ((LOG_ERR,
+ "%s failed to remove password of group %s%s",
+ myname, group, suffix));
+#ifdef WITH_AUDIT
+ snprintf (buf, 1023,
+ "%s failed to remove password of group %s%s",
+ myname, group, suffix);
+ buf[1023] = '\0';
+ audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
+ buf,
+ group, AUDIT_NO_ID,
+ SHADOW_AUDIT_FAILURE);
+#endif
+ } else if (Rflg) {
+ SYSLOG ((LOG_ERR,
+ "%s failed to restrict access to group %s%s",
+ myname, group, suffix));
+#ifdef WITH_AUDIT
+ snprintf (buf, 1023,
+ "%s failed to restrict access to group %s%s",
+ myname, group, suffix);
+ buf[1023] = '\0';
+ audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
+ buf,
+ group, AUDIT_NO_ID,
+ SHADOW_AUDIT_FAILURE);
+#endif
+ } else if (Aflg || Mflg) {
+#ifdef SHADOWGRP
+ if (Aflg) {
+ SYSLOG ((LOG_ERR,
+ "%s failed to set the administrators of group %s to %s%s",
+ myname, group, admins, suffix));
+#ifdef WITH_AUDIT
+ snprintf (buf, 1023,
+ "%s failed to set the administrators of group %s to %s%s",
+ myname, group, admins, suffix);
+ buf[1023] = '\0';
+ audit_logger (AUDIT_USER_ACCT, Prog,
+ buf,
+ group, AUDIT_NO_ID,
+ SHADOW_AUDIT_FAILURE);
+#endif
+ }
+#endif /* SHADOWGRP */
+ if (Mflg) {
+ SYSLOG ((LOG_ERR,
+ "%s failed to set the members of group %s to %s%s",
+ myname, group, members, suffix));
+#ifdef WITH_AUDIT
+ snprintf (buf, 1023,
+ "%s failed to set the members of group %s to %s%s",
+ myname, group, members, suffix);
+ buf[1023] = '\0';
+ audit_logger (AUDIT_USER_ACCT, Prog,
+ buf,
+ group, AUDIT_NO_ID,
+ SHADOW_AUDIT_FAILURE);
+#endif
+ }
+ } else {
+ SYSLOG ((LOG_ERR,
+ "%s failed to change password of group %s%s",
+ myname, group, suffix));
+#ifdef WITH_AUDIT
+ snprintf (buf, 1023,
+ "%s failed to change password of group %s%s",
+ myname, group, suffix);
+ buf[1023] = '\0';
+ audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
+ buf,
+ group, AUDIT_NO_ID,
+ SHADOW_AUDIT_FAILURE);
+#endif
+ }
+}
+
+static void log_gpasswd_failure_system (unused void *arg)
+{
+ log_gpasswd_failure ("");
+}
+
+static void log_gpasswd_failure_group (unused void *arg)
+{
+ char buf[1024];
+ snprintf (buf, 1023, " in %s", gr_dbname ());
+ buf[1023] = '\0';
+ log_gpasswd_failure (buf);
+}
+
+#ifdef SHADOWGRP
+static void log_gpasswd_failure_gshadow (unused void *arg)
+{
+ char buf[1024];
+ snprintf (buf, 1023, " in %s", sgr_dbname ());
+ buf[1023] = '\0';
+ log_gpasswd_failure (buf);
+}
+#endif /* SHADOWGRP */
+
+static void log_gpasswd_success (const char *suffix)
+{
+#ifdef WITH_AUDIT
+ char buf[1024];
+#endif
+ if (aflg) {
+ SYSLOG ((LOG_INFO,
+ "user %s added by %s to group %s%s",
+ user, myname, group, suffix));
+#ifdef WITH_AUDIT
+ snprintf (buf, 1023,
+ "user %s added by %s to group %s%s",
+ user, myname, group, suffix);
+ buf[1023] = '\0';
+ audit_logger (AUDIT_USER_ACCT, Prog,
+ buf,
+ group, AUDIT_NO_ID,
+ SHADOW_AUDIT_SUCCESS);
+#endif
+ } else if (dflg) {
+ SYSLOG ((LOG_INFO,
+ "user %s removed by %s from group %s%s",
+ user, myname, group, suffix));
+#ifdef WITH_AUDIT
+ snprintf (buf, 1023,
+ "user %s removed by %s from group %s%s",
+ user, myname, group, suffix);
+ buf[1023] = '\0';
+ audit_logger (AUDIT_USER_ACCT, Prog,
+ buf,
+ group, AUDIT_NO_ID,
+ SHADOW_AUDIT_SUCCESS);
+#endif
+ } else if (rflg) {
+ SYSLOG ((LOG_INFO,
+ "password of group %s removed by %s%s",
+ group, myname, suffix));
+#ifdef WITH_AUDIT
+ snprintf (buf, 1023,
+ "password of group %s removed by %s%s",
+ group, myname, suffix);
+ buf[1023] = '\0';
+ audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
+ buf,
+ group, AUDIT_NO_ID,
+ SHADOW_AUDIT_SUCCESS);
+#endif
+ } else if (Rflg) {
+ SYSLOG ((LOG_INFO,
+ "access to group %s restricted by %s%s",
+ group, myname, suffix));
+#ifdef WITH_AUDIT
+ snprintf (buf, 1023,
+ "access to group %s restricted by %s%s",
+ group, myname, suffix);
+ buf[1023] = '\0';
+ audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
+ buf,
+ group, AUDIT_NO_ID,
+ SHADOW_AUDIT_SUCCESS);
+#endif
+ } else if (Aflg || Mflg) {
+#ifdef SHADOWGRP
+ if (Aflg) {
+ SYSLOG ((LOG_INFO,
+ "administrators of group %s set by %s to %s%s",
+ group, myname, admins, suffix));
+#ifdef WITH_AUDIT
+ snprintf (buf, 1023,
+ "administrators of group %s set by %s to %s%s",
+ group, myname, admins, suffix);
+ buf[1023] = '\0';
+ audit_logger (AUDIT_USER_ACCT, Prog,
+ buf,
+ group, AUDIT_NO_ID,
+ SHADOW_AUDIT_SUCCESS);
+#endif
+ }
+#endif /* SHADOWGRP */
+ if (Mflg) {
+ SYSLOG ((LOG_INFO,
+ "members of group %s set by %s to %s%s",
+ group, myname, members, suffix));
+#ifdef WITH_AUDIT
+ snprintf (buf, 1023,
+ "members of group %s set by %s to %s%s",
+ group, myname, members, suffix);
+ buf[1023] = '\0';
+ audit_logger (AUDIT_USER_ACCT, Prog,
+ buf,
+ group, AUDIT_NO_ID,
+ SHADOW_AUDIT_SUCCESS);
+#endif
+ }
+ } else {
+ SYSLOG ((LOG_INFO,
+ "password of group %s changed by %s%s",
+ group, myname, suffix));
+#ifdef WITH_AUDIT
+ snprintf (buf, 1023,
+ "password of group %s changed by %s%s",
+ group, myname, suffix);
+ buf[1023] = '\0';
+ audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
+ buf,
+ group, AUDIT_NO_ID,
+ SHADOW_AUDIT_SUCCESS);
+#endif
+ }
+}
+
+static void log_gpasswd_success_system (unused void *arg)
+{
+ log_gpasswd_success ("");
+}
+
+static void log_gpasswd_success_group (unused void *arg)
+{
+ char buf[1024];
+ snprintf (buf, 1023, " in %s", gr_dbname ());
+ buf[1023] = '\0';
+ log_gpasswd_success (buf);
+}
+
+#ifdef SHADOWGRP
+static void log_gpasswd_success_gshadow (unused void *arg)
+{
+ char buf[1024];
+ snprintf (buf, 1023, " in %s", sgr_dbname ());
+ buf[1023] = '\0';
+ log_gpasswd_success (buf);
+}
+#endif /* SHADOWGRP */
+
+/*
+ * close_files - close and unlock the group databases
+ *
+ * This cause any changes in the databases to be committed.
+ *
+ * It will call exit in case of error.
+ */
+static void close_files (void)
+{
+ if (gr_close () == 0) {
+ fprintf (stderr,
+ _("%s: failure while writing changes to %s\n"),
+ Prog, gr_dbname ());
+ exit (E_NOPERM);
+ }
+ add_cleanup (log_gpasswd_success_group, NULL);
+ del_cleanup (log_gpasswd_failure_group);
+
+ cleanup_unlock_group (NULL);
+ del_cleanup (cleanup_unlock_group);
+
+#ifdef SHADOWGRP
+ if (is_shadowgrp) {
+ if (sgr_close () == 0) {
+ fprintf (stderr,
+ _("%s: failure while writing changes to %s\n"),
+ Prog, sgr_dbname ());
+ exit (E_NOPERM);
+ }
+ add_cleanup (log_gpasswd_success_gshadow, NULL);
+ del_cleanup (log_gpasswd_failure_gshadow);
+
+ cleanup_unlock_gshadow (NULL);
+ del_cleanup (cleanup_unlock_gshadow);
+ }
+#endif /* SHADOWGRP */
+
+ log_gpasswd_success_system (NULL);
+ del_cleanup (log_gpasswd_success_group);
+#ifdef SHADOWGRP
+ if (is_shadowgrp) {
+ del_cleanup (log_gpasswd_success_gshadow);
+ }
+#endif
+}
+
+/*
+ * check_perms - check if the user is allowed to change the password of
+ * the specified group.
+ *
+ * It only returns if the user is allowed.
+ */
+#ifdef SHADOWGRP
+static void check_perms (const struct group *gr, const struct sgrp *sg)
+#else
+static void check_perms (const struct group *gr)
+#endif
+{
+ /*
+ * Only root can use the -M and -A options.
+ */
+ if (!amroot && (Aflg || Mflg)) {
+ failure ();
+ }
+
+#ifdef SHADOWGRP
+ if (is_shadowgrp) {
+ /*
+ * The policy here for changing a group is that
+ * 1) you must be root or
+ * 2) you must be listed as an administrative member.
+ * Administrative members can do anything to a group that
+ * the root user can.
+ */
+ if (!amroot && !is_on_list (sg->sg_adm, myname)) {
+ failure ();
+ }
+ } else
+#endif /* SHADOWGRP */
+ {
+#ifdef FIRST_MEMBER_IS_ADMIN
+ /*
+ * The policy here for changing a group is that
+ * 1) you must be root or
+ * 2) you must be the first listed member of the group.
+ * The first listed member of a group can do anything to
+ * that group that the root user can. The rationale for
+ * this hack is that the FIRST user is probably the most
+ * important user in this entire group.
+ *
+ * This feature enabled by default could be a security
+ * problem when installed on existing systems where the
+ * first group member might be just a normal user.
+ * --marekm
+ */
+ if (!amroot) {
+ if (gr->gr_mem[0] == (char *) 0) {
+ failure ();
+ }
+
+ if (strcmp (gr->gr_mem[0], myname) != 0) {
+ failure ();
+ }
+ }
+#else /* ! FIRST_MEMBER_IS_ADMIN */
+ if (!amroot) {
+ failure ();
+ }
+#endif
+ }
+}
+
+/*
+ * update_group - Update the group information in the databases
+ */
+#ifdef SHADOWGRP
+static void update_group (struct group *gr, struct sgrp *sg)
+#else
+static void update_group (struct group *gr)
+#endif
+{
+ if (gr_update (gr) == 0) {
+ fprintf (stderr,
+ _("%s: failed to prepare the new %s entry '%s'\n"),
+ Prog, gr_dbname (), gr->gr_name);
+ exit (1);
+ }
+#ifdef SHADOWGRP
+ if (is_shadowgrp && (sgr_update (sg) == 0)) {
+ fprintf (stderr,
+ _("%s: failed to prepare the new %s entry '%s'\n"),
+ Prog, sgr_dbname (), sg->sg_name);
+ exit (1);
+ }
+#endif /* SHADOWGRP */
+}
+
+/*
+ * get_group - get the current information for the group
+ *
+ * The information are copied in group structure(s) so that they can be
+ * modified later.
+ *
+ * Note: If !is_shadowgrp, *sg will not be initialized.
+ */
+#ifdef SHADOWGRP
+static void get_group (struct group *gr, struct sgrp *sg)
+#else
+static void get_group (struct group *gr)
+#endif
+{
+ struct group const*tmpgr = NULL;
+#ifdef SHADOWGRP
+ struct sgrp const*tmpsg = NULL;
+#endif
+
+ if (gr_open (O_RDONLY) == 0) {
+ fprintf (stderr, _("%s: cannot open %s\n"), Prog, gr_dbname ());
+ SYSLOG ((LOG_WARN, "cannot open %s", gr_dbname ()));
+ exit (E_NOPERM);
+ }
+
+ tmpgr = gr_locate (group);
+ if (NULL == tmpgr) {
+ fprintf (stderr,
+ _("%s: group '%s' does not exist in %s\n"),
+ Prog, group, gr_dbname ());
+ exit (E_BAD_ARG);
+ }
+
+ *gr = *tmpgr;
+ gr->gr_name = xstrdup (tmpgr->gr_name);
+ gr->gr_passwd = xstrdup (tmpgr->gr_passwd);
+ gr->gr_mem = dup_list (tmpgr->gr_mem);
+
+ if (gr_close () == 0) {
+ fprintf (stderr,
+ _("%s: failure while closing read-only %s\n"),
+ Prog, gr_dbname ());
+ SYSLOG ((LOG_ERR,
+ "failure while closing read-only %s",
+ gr_dbname ()));
+ exit (E_NOPERM);
+ }
+
+#ifdef SHADOWGRP
+ if (is_shadowgrp) {
+ if (sgr_open (O_RDONLY) == 0) {
+ fprintf (stderr,
+ _("%s: cannot open %s\n"),
+ Prog, sgr_dbname ());
+ SYSLOG ((LOG_WARN, "cannot open %s", sgr_dbname ()));
+ exit (E_NOPERM);
+ }
+ tmpsg = sgr_locate (group);
+ if (NULL != tmpsg) {
+ *sg = *tmpsg;
+ sg->sg_name = xstrdup (tmpsg->sg_name);
+ sg->sg_passwd = xstrdup (tmpsg->sg_passwd);
+
+ sg->sg_mem = dup_list (tmpsg->sg_mem);
+ sg->sg_adm = dup_list (tmpsg->sg_adm);
+ } else {
+ sg->sg_name = xstrdup (group);
+ sg->sg_passwd = gr->gr_passwd;
+ gr->gr_passwd = SHADOW_PASSWD_STRING; /* XXX warning: const */
+
+ sg->sg_mem = dup_list (gr->gr_mem);
+
+ sg->sg_adm = (char **) xmalloc (sizeof (char *) * 2);
+#ifdef FIRST_MEMBER_IS_ADMIN
+ if (sg->sg_mem[0]) {
+ sg->sg_adm[0] = xstrdup (sg->sg_mem[0]);
+ sg->sg_adm[1] = NULL;
+ } else
+#endif
+ {
+ sg->sg_adm[0] = NULL;
+ }
+
+ }
+ if (sgr_close () == 0) {
+ fprintf (stderr,
+ _("%s: failure while closing read-only %s\n"),
+ Prog, sgr_dbname ());
+ SYSLOG ((LOG_ERR,
+ "failure while closing read-only %s",
+ sgr_dbname ()));
+ exit (E_NOPERM);
+ }
+ }
+#endif /* SHADOWGRP */
+}
+
+/*
+ * change_passwd - change the group's password
+ *
+ * Get the new password from the user and update the password in the
+ * group's structure.
+ *
+ * It will call exit in case of error.
+ */
+#ifdef SHADOWGRP
+static void change_passwd (struct group *gr, struct sgrp *sg)
+#else
+static void change_passwd (struct group *gr)
+#endif
+{
+ char *cp;
+ static char pass[BUFSIZ];
+ int retries;
+
+ /*
+ * A new password is to be entered and it must be encrypted, etc.
+ * The password will be prompted for twice, and both entries must be
+ * identical. There is no need to validate the old password since
+ * the invoker is either the group owner, or root.
+ */
+ printf (_("Changing the password for group %s\n"), group);
+
+ for (retries = 0; retries < RETRIES; retries++) {
+ cp = getpass (_("New Password: "));
+ if (NULL == cp) {
+ exit (1);
+ }
+
+ STRFCPY (pass, cp);
+ strzero (cp);
+ cp = getpass (_("Re-enter new password: "));
+ if (NULL == cp) {
+ exit (1);
+ }
+
+ if (strcmp (pass, cp) == 0) {
+ strzero (cp);
+ break;
+ }
+
+ strzero (cp);
+ memzero (pass, sizeof pass);
+
+ if (retries + 1 < RETRIES) {
+ puts (_("They don't match; try again"));
}
}
- return errors;
-}
-static void failure (void)
-{
- fprintf (stderr, _("%s: Permission denied.\n"), Prog);
- exit (1);
+ if (retries == RETRIES) {
+ fprintf (stderr, _("%s: Try again later\n"), Prog);
+ exit (1);
+ }
+
+ cp = pw_encrypt (pass, crypt_make_salt (NULL, NULL));
+ memzero (pass, sizeof pass);
+#ifdef SHADOWGRP
+ if (is_shadowgrp) {
+ sg->sg_passwd = cp;
+ } else
+#endif
+ {
+ gr->gr_passwd = cp;
+ }
}
/*
* gpasswd - administer the /etc/group file
- *
- * -a user add user to the named group
- * -d user remove user from the named group
- * -r remove password from the named group
- * -R restrict access to the named group
- * -A user,... make list of users the administrative users
- * -M user,... make list of users the group members
*/
int main (int argc, char **argv)
{
- int flag;
- char *cp;
- int amroot;
- int retries;
- struct group const*gr = NULL;
struct group grent;
- static char pass[BUFSIZ];
-
-#ifdef SHADOWGRP
- struct sgrp const*sg = NULL;
+#ifdef SHADOWGRP
struct sgrp sgent;
- char *admins = NULL;
#endif
struct passwd *pw = NULL;
- char *myname;
- char *user = NULL;
- char *group = NULL;
- char *members = NULL;
#ifdef WITH_AUDIT
audit_help_open ();
#endif
sanitize_env ();
- setlocale (LC_ALL, "");
- bindtextdomain (PACKAGE, LOCALEDIR);
- textdomain (PACKAGE);
+ (void) setlocale (LC_ALL, "");
+ (void) bindtextdomain (PACKAGE, LOCALEDIR);
+ (void) textdomain (PACKAGE);
/*
* Make a note of whether or not this command was invoked by root.
* This will be used to bypass certain checks later on. Also, set
* the real user ID to match the effective user ID. This will
- * prevent the invoker from issuing signals which would interfer
+ * prevent the invoker from issuing signals which would interfere
* with this command.
*/
- amroot = getuid () == 0;
bywho = getuid ();
Prog = Basename (argv[0]);
#ifdef SHADOWGRP
is_shadowgrp = sgr_file_present ();
#endif
- while ((flag = getopt (argc, argv, "a:A:d:gM:rR")) != EOF) {
- switch (flag) {
- case 'a': /* add a user */
- user = optarg;
- /* local, no need for xgetpwnam */
- if (!getpwnam (user)) {
- fprintf (stderr,
- _("%s: unknown user %s\n"), Prog,
- user);
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
- "adding to group", user, -1, 0);
-#endif
- exit (1);
- }
- aflg++;
- break;
-#ifdef SHADOWGRP
- case 'A':
- if (!amroot) {
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
- "Listing administrators", NULL,
- bywho, 0);
-#endif
- failure ();
- }
- if (!is_shadowgrp) {
- fprintf (stderr,
- _
- ("%s: shadow group passwords required for -A\n"),
- Prog);
- exit (2);
- }
- admins = optarg;
- if (check_list (admins))
- exit (1);
- Aflg++;
- break;
-#endif
- case 'd': /* delete a user */
- dflg++;
- user = optarg;
- break;
- case 'g': /* no-op from normal password */
- break;
- case 'M':
- if (!amroot) {
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
- "listing members", NULL, bywho,
- 0);
-#endif
- failure ();
- }
- members = optarg;
- if (check_list (members))
- exit (1);
- Mflg++;
- break;
- case 'r': /* remove group password */
- rflg++;
- break;
- case 'R': /* restrict group password */
- Rflg++;
- break;
- default:
- usage ();
- }
- }
-
- /*
- * Make sure exclusive flags are exclusive
- */
-
- if (aflg + dflg + rflg + Rflg + (Aflg || Mflg) > 1)
- usage ();
/*
* Determine the name of the user that invoked this command. This
* can be executed and so many ways to trip up the routines that
* report the user name.
*/
-
pw = get_my_pwent ();
- if (!pw) {
- fprintf (stderr, _("Who are you?\n"));
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "user lookup", NULL,
- bywho, 0);
-#endif
- failure ();
+ if (NULL == pw) {
+ fprintf (stderr, _("%s: Cannot determine your user name.\n"),
+ Prog);
+ SYSLOG ((LOG_WARN,
+ "Cannot determine the user name of the caller (UID %lu)",
+ (unsigned long) getuid ()));
+ exit (E_NOPERM);
}
myname = xstrdup (pw->pw_name);
/*
- * Get the name of the group that is being affected. The group entry
- * will be completely replicated so it may be modified later on.
+ * Register an exit function to warn for any inconsistency that we
+ * could create.
*/
-
- if (!(group = argv[optind]))
- usage ();
-
- if (!gr_open (O_RDONLY)) {
- fprintf (stderr, _("%s: can't open file\n"), Prog);
- SYSLOG ((LOG_WARN, "cannot open /etc/group"));
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "opening /etc/group",
- group, -1, 0);
-#endif
- exit (1);
- }
-
- if (!(gr = gr_locate (group))) {
- fprintf (stderr, _("unknown group: %s\n"), group);
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "group lookup", group,
- -1, 0);
-#endif
- failure ();
- }
- grent = *gr;
- grent.gr_name = xstrdup (gr->gr_name);
- grent.gr_passwd = xstrdup (gr->gr_passwd);
-
- grent.gr_mem = dup_list (gr->gr_mem);
- if (!gr_close ()) {
- fprintf (stderr, _("%s: can't close file\n"), Prog);
- SYSLOG ((LOG_WARN, "cannot close /etc/group"));
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
- "closing /etc/group", group, -1, 0);
-#endif
- exit (1);
- }
-#ifdef SHADOWGRP
- if (!sgr_open (O_RDONLY)) {
- fprintf (stderr, _("%s: can't open shadow file\n"), Prog);
- SYSLOG ((LOG_WARN, "cannot open /etc/gshadow"));
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
- "opening /etc/gshadow", group, -1, 0);
-#endif
+ if (atexit (do_cleanups) != 0) {
+ fprintf(stderr, "%s: cannot set exit function\n", Prog);
exit (1);
}
- if ((sg = sgr_locate (group))) {
- sgent = *sg;
- sgent.sg_name = xstrdup (sg->sg_name);
- sgent.sg_passwd = xstrdup (sg->sg_passwd);
-
- sgent.sg_mem = dup_list (sg->sg_mem);
- sgent.sg_adm = dup_list (sg->sg_adm);
- } else {
- sgent.sg_name = xstrdup (group);
- sgent.sg_passwd = grent.gr_passwd;
- grent.gr_passwd = "!"; /* XXX warning: const */
-
- sgent.sg_mem = dup_list (grent.gr_mem);
-
- sgent.sg_adm = (char **) xmalloc (sizeof (char *) * 2);
-#ifdef FIRST_MEMBER_IS_ADMIN
- if (sgent.sg_mem[0]) {
- sgent.sg_adm[0] = xstrdup (sgent.sg_mem[0]);
- sgent.sg_adm[1] = 0;
- } else
-#endif
- sgent.sg_adm[0] = 0;
- sg = &sgent;
- }
- if (!sgr_close ()) {
- fprintf (stderr, _("%s: can't close shadow file\n"), Prog);
- SYSLOG ((LOG_WARN, "cannot close /etc/gshadow"));
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
- "closing /etc/gshadow", group, -1, 0);
-#endif
- exit (1);
- }
+ /* Parse the options */
+ process_flags (argc, argv);
/*
- * The policy here for changing a group is that 1) you must be root
- * or 2). you must be listed as an administrative member.
- * Administrative members can do anything to a group that the root
- * user can.
+ * Replicate the group so it can be modified later on.
*/
- if (!amroot && !is_on_list (sgent.sg_adm, myname)) {
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "modify group", group,
- -1, 0);
+#ifdef SHADOWGRP
+ get_group (&grent, &sgent);
+#else
+ get_group (&grent);
#endif
- failure ();
- }
-#else /* ! SHADOWGRP */
-#ifdef FIRST_MEMBER_IS_ADMIN
/*
- * The policy here for changing a group is that 1) you must bes root
- * or 2) you must be the first listed member of the group. The
- * first listed member of a group can do anything to that group that
- * the root user can. The rationale for this hack is that the FIRST
- * user is probably the most important user in this entire group.
+ * Check if the user is allowed to change the password of this group.
*/
- if (!amroot) {
- if (grent.gr_mem[0] == (char *) 0) {
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
- "modifying group", group, -1, 0);
-#endif
- failure ();
- }
-
- if (strcmp (grent.gr_mem[0], myname) != 0) {
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
- "modifying group", myname, -1, 0);
-#endif
- failure ();
- }
- }
+#ifdef SHADOWGRP
+ check_perms (&grent, &sgent);
#else
- /*
- * This feature enabled by default could be a security problem when
- * installed on existing systems where the first group member might
- * be just a normal user. --marekm
- */
- if (!amroot) {
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "modifying group",
- group, -1, 0);
-#endif
- failure ();
- }
+ check_perms (&grent);
#endif
-#endif /* SHADOWGRP */
-
/*
* Removing a password is straight forward. Just set the password
* field to a "".
*/
if (rflg) {
grent.gr_passwd = ""; /* XXX warning: const */
-#ifdef SHADOWGRP
+#ifdef SHADOWGRP
sgent.sg_passwd = ""; /* XXX warning: const */
#endif
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
- "deleting group password", group, -1, 1);
-#endif
- SYSLOG ((LOG_INFO, "remove password from group %s by %s",
- group, myname));
goto output;
} else if (Rflg) {
/*
* field to "!".
*/
grent.gr_passwd = "!"; /* XXX warning: const */
-#ifdef SHADOWGRP
+#ifdef SHADOWGRP
sgent.sg_passwd = "!"; /* XXX warning: const */
#endif
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
- "restrict access to group", group, -1, 1);
-#endif
- SYSLOG ((LOG_INFO, "restrict access to group %s by %s",
- group, myname));
goto output;
}
if (aflg) {
printf (_("Adding user %s to group %s\n"), user, group);
grent.gr_mem = add_list (grent.gr_mem, user);
-#ifdef SHADOWGRP
- sgent.sg_mem = add_list (sgent.sg_mem, user);
-#endif
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "adding group member",
- user, -1, 1);
+#ifdef SHADOWGRP
+ if (is_shadowgrp) {
+ sgent.sg_mem = add_list (sgent.sg_mem, user);
+ }
#endif
- SYSLOG ((LOG_INFO, "add member %s to group %s by %s", user,
- group, myname));
goto output;
}
* one, except the routine is different.
*/
if (dflg) {
- int removed = 0;
+ bool removed = false;
printf (_("Removing user %s from group %s\n"), user, group);
if (is_on_list (grent.gr_mem, user)) {
- removed = 1;
+ removed = true;
grent.gr_mem = del_list (grent.gr_mem, user);
}
-#ifdef SHADOWGRP
- if (is_on_list (sgent.sg_mem, user)) {
- removed = 1;
- sgent.sg_mem = del_list (sgent.sg_mem, user);
+#ifdef SHADOWGRP
+ if (is_shadowgrp) {
+ if (is_on_list (sgent.sg_mem, user)) {
+ removed = true;
+ sgent.sg_mem = del_list (sgent.sg_mem, user);
+ }
}
#endif
if (!removed) {
- fprintf (stderr, _("%s: unknown member %s\n"),
- Prog, user);
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
- "deleting member", user, -1, 0);
-#endif
- exit (1);
+ fprintf (stderr,
+ _("%s: user '%s' is not a member of '%s'\n"),
+ Prog, user, group);
+ exit (E_BAD_ARG);
}
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "deleting member",
- user, -1, 1);
-#endif
- SYSLOG ((LOG_INFO, "remove member %s from group %s by %s",
- user, group, myname));
goto output;
}
-#ifdef SHADOWGRP
+#ifdef SHADOWGRP
/*
- * Replacing the entire list of administators is simple. Check the
+ * Replacing the entire list of administrators is simple. Check the
* list to make sure everyone is a real user. Then slap the new list
* in place.
*/
if (Aflg) {
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "setting group admin",
- group, -1, 1);
-#endif
- SYSLOG ((LOG_INFO, "set administrators of %s to %s",
- group, admins));
sgent.sg_adm = comma_to_list (admins);
- if (!Mflg)
+ if (!Mflg) {
goto output;
+ }
}
-#endif
+#endif /* SHADOWGRP */
/*
* Replacing the entire list of members is simple. Check the list to
* place.
*/
if (Mflg) {
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
- "setting group members", group, -1, 1);
-#endif
- SYSLOG ((LOG_INFO, "set members of %s to %s", group, members));
#ifdef SHADOWGRP
sgent.sg_mem = comma_to_list (members);
#endif
* be a tty. The typical keyboard signals are caught so the termio
* modes can be restored.
*/
- if (!isatty (0) || !isatty (1)) {
+ if ((isatty (0) == 0) || (isatty (1) == 0)) {
fprintf (stderr, _("%s: Not a tty\n"), Prog);
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "changing password",
- group, -1, 0);
-#endif
- exit (1);
+ exit (E_NOPERM);
}
catch_signals (0); /* save tty modes */
- signal (SIGHUP, catch_signals);
- signal (SIGINT, catch_signals);
- signal (SIGQUIT, catch_signals);
- signal (SIGTERM, catch_signals);
-#ifdef SIGTSTP
- signal (SIGTSTP, catch_signals);
-#endif
-
- /*
- * A new password is to be entered and it must be encrypted, etc.
- * The password will be prompted for twice, and both entries must be
- * identical. There is no need to validate the old password since
- * the invoker is either the group owner, or root.
- */
- printf (_("Changing the password for group %s\n"), group);
-
- for (retries = 0; retries < RETRIES; retries++) {
- if (!(cp = getpass (_("New Password: "))))
- exit (1);
-
- STRFCPY (pass, cp);
- strzero (cp);
- if (!(cp = getpass (_("Re-enter new password: "))))
- exit (1);
-
- if (strcmp (pass, cp) == 0) {
- strzero (cp);
- break;
- }
-
- strzero (cp);
- memzero (pass, sizeof pass);
-
- if (retries + 1 < RETRIES) {
- puts (_("They don't match; try again"));
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
- "changing password", group, -1, 0);
+ (void) signal (SIGHUP, catch_signals);
+ (void) signal (SIGINT, catch_signals);
+ (void) signal (SIGQUIT, catch_signals);
+ (void) signal (SIGTERM, catch_signals);
+#ifdef SIGTSTP
+ (void) signal (SIGTSTP, catch_signals);
#endif
- }
- }
-
- if (retries == RETRIES) {
- fprintf (stderr, _("%s: Try again later\n"), Prog);
- exit (1);
- }
- cp = pw_encrypt (pass, crypt_make_salt (NULL, NULL));
- memzero (pass, sizeof pass);
+ /* Prompt for the new password */
#ifdef SHADOWGRP
- if (is_shadowgrp)
- sgent.sg_passwd = cp;
- else
-#endif
- grent.gr_passwd = cp;
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "changing password", group,
- -1, 1);
+ change_passwd (&grent, &sgent);
+#else
+ change_passwd (&grent);
#endif
- SYSLOG ((LOG_INFO, "change the password for group %s by %s", group,
- myname));
/*
* This is the common arrival point to output the new group file.
* output, etc.
*/
output:
- if (setuid (0)) {
- fprintf (stderr, _("Cannot change ID to root.\n"));
+ if (setuid (0) != 0) {
+ fputs (_("Cannot change ID to root.\n"), stderr);
SYSLOG ((LOG_ERR, "can't setuid(0)"));
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "changing id to root",
- group, -1, 0);
-#endif
closelog ();
- exit (1);
+ exit (E_NOPERM);
}
pwd_init ();
- if (!gr_lock ()) {
- fprintf (stderr, _("%s: can't get lock\n"), Prog);
- SYSLOG ((LOG_WARN, "failed to get lock for /etc/group"));
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "locking /etc/group",
- group, -1, 0);
-#endif
- exit (1);
- }
-#ifdef SHADOWGRP
- if (is_shadowgrp && !sgr_lock ()) {
- fprintf (stderr, _("%s: can't get shadow lock\n"), Prog);
- SYSLOG ((LOG_WARN, "failed to get lock for /etc/gshadow"));
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
- "locking /etc/gshadow", group, -1, 0);
-#endif
- exit (1);
- }
-#endif
- if (!gr_open (O_RDWR)) {
- fprintf (stderr, _("%s: can't open file\n"), Prog);
- SYSLOG ((LOG_WARN, "cannot open /etc/group"));
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "opening /etc/group",
- group, -1, 0);
-#endif
- exit (1);
- }
-#ifdef SHADOWGRP
- if (is_shadowgrp && !sgr_open (O_RDWR)) {
- fprintf (stderr, _("%s: can't open shadow file\n"), Prog);
- SYSLOG ((LOG_WARN, "cannot open /etc/gshadow"));
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
- "opening /etc/gshadow", group, -1, 0);
-#endif
- exit (1);
- }
-#endif
- if (!gr_update (&grent)) {
- fprintf (stderr, _("%s: can't update entry\n"), Prog);
- SYSLOG ((LOG_WARN, "cannot update /etc/group"));
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "updating /etc/group",
- group, -1, 0);
-#endif
- exit (1);
- }
-#ifdef SHADOWGRP
- if (is_shadowgrp && !sgr_update (&sgent)) {
- fprintf (stderr, _("%s: can't update shadow entry\n"), Prog);
- SYSLOG ((LOG_WARN, "cannot update /etc/gshadow"));
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
- "updating /etc/gshadow", group, -1, 0);
-#endif
- exit (1);
- }
-#endif
- if (!gr_close ()) {
- fprintf (stderr, _("%s: can't re-write file\n"), Prog);
- SYSLOG ((LOG_WARN, "cannot re-write /etc/group"));
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
- "rewriting /etc/group", group, -1, 0);
-#endif
- exit (1);
- }
-#ifdef SHADOWGRP
- if (is_shadowgrp && !sgr_close ()) {
- fprintf (stderr, _("%s: can't re-write shadow file\n"), Prog);
- SYSLOG ((LOG_WARN, "cannot re-write /etc/gshadow"));
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
- "rewriting /etc/gshadow", group, -1, 0);
-#endif
- exit (1);
- }
- if (is_shadowgrp)
- sgr_unlock ();
-#endif
- if (!gr_unlock ()) {
- fprintf (stderr, _("%s: can't unlock file\n"), Prog);
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
- "unlocking group file", group, -1, 0);
+ open_files ();
+
+#ifdef SHADOWGRP
+ update_group (&grent, &sgent);
+#else
+ update_group (&grent);
#endif
- exit (1);
- }
+
+ close_files ();
nscd_flush_cache ("group");
exit (E_SUCCESS);
}
+
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