/*
- * Copyright 1991 - 1993, Julianne Frances Haugh
+ * Copyright (c) 1991 - 1993, Julianne Frances Haugh
+ * Copyright (c) 1996 - 2000, Marek Michałkiewicz
+ * Copyright (c) 2000 - 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 <grp.h>
#include <stdio.h>
#include <sys/types.h>
+#ifdef ACCT_TOOLS_SETUID
#ifdef USE_PAM
#include "pam_defs.h"
#include <pwd.h>
#endif /* USE_PAM */
+#endif /* ACCT_TOOLS_SETUID */
#include "chkname.h"
#include "defines.h"
#include "getdef.h"
#include "prototypes.h"
#ifdef SHADOWGRP
#include "sgroupio.h"
-static int is_shadow_grp;
#endif
/*
* exit status values
*/
+/*@-exitarg@*/
#define E_SUCCESS 0 /* success */
#define E_USAGE 2 /* invalid command syntax */
#define E_BAD_ARG 3 /* invalid argument to option */
/*
* Global variables
*/
-static char *group_name;
+const char *Prog;
+
+static /*@null@*/char *group_name;
static gid_t group_id;
-static char *empty_list = NULL;
+static /*@null@*/char *group_passwd;
+static /*@null@*/char *empty_list = NULL;
-static char *Prog;
+static bool oflg = false; /* permit non-unique group ID to be specified with -g */
+static bool gflg = false; /* ID value for the new group */
+static bool fflg = false; /* if group already exists, do nothing and exit(0) */
+static bool rflg = false; /* create a system account */
+static bool pflg = false; /* new encrypted password */
-static int oflg = 0; /* permit non-unique group ID to be specified with -g */
-static int gflg = 0; /* ID value for the new group */
-static int fflg = 0; /* if group already exists, do nothing and exit(0) */
+#ifdef SHADOWGRP
+static bool is_shadow_grp;
+#endif
/* local function prototypes */
-static void usage (void);
-static void new_grent (struct group *);
+static void usage (int status);
+static void new_grent (struct group *grent);
#ifdef SHADOWGRP
-static void new_sgent (struct sgrp *);
+static void new_sgent (struct sgrp *sgent);
#endif
static void grp_update (void);
-static void find_new_gid (void);
static void check_new_name (void);
static void close_files (void);
static void open_files (void);
-static void fail_exit (int);
-static gid_t get_gid (const char *gidstr);
+static void process_flags (int argc, char **argv);
+static void check_flags (void);
+static void check_perms (void);
/*
* usage - display usage message and exit
*/
-static void usage (void)
+static void usage (int status)
{
- fprintf (stderr, _("Usage: groupadd [options] GROUP\n"
- "\n"
- "Options:\n"
- " -f, --force force exit with success status if the\n"
- " specified group already exists\n"
- " -g, --gid GID use GID for the new group\n"
- " -h, --help display this help message and exit\n"
- " -K, --key KEY=VALUE overrides /etc/login.defs defaults\n"
- " -o, --non-unique allow create group with duplicate\n"
- " (non-unique) GID\n"
- "\n"));
- exit (E_USAGE);
+ FILE *usageout = (E_SUCCESS != status) ? stderr : stdout;
+ (void) fprintf (usageout,
+ _("Usage: %s [options] GROUP\n"
+ "\n"
+ "Options:\n"),
+ Prog);
+ (void) fputs (_(" -f, --force exit successfully if the group already exists,\n"
+ " and cancel -g if the GID is already used\n"), usageout);
+ (void) fputs (_(" -g, --gid GID use GID for the new group\n"), usageout);
+ (void) fputs (_(" -h, --help display this help message and exit\n"), usageout);
+ (void) fputs (_(" -K, --key KEY=VALUE override /etc/login.defs defaults\n"), usageout);
+ (void) fputs (_(" -o, --non-unique allow to create groups with duplicate\n"
+ " (non-unique) GID\n"), usageout);
+ (void) fputs (_(" -p, --password PASSWORD use this encrypted password for the new group\n"), usageout);
+ (void) fputs (_(" -r, --system create a system account\n"), usageout);
+ (void) fputs ("\n", usageout);
+ exit (status);
}
/*
{
memzero (grent, sizeof *grent);
grent->gr_name = group_name;
- grent->gr_passwd = SHADOW_PASSWD_STRING; /* XXX warning: const */
+ if (pflg) {
+ grent->gr_passwd = group_passwd;
+ } else {
+ grent->gr_passwd = SHADOW_PASSWD_STRING; /* XXX warning: const */
+ }
grent->gr_gid = group_id;
grent->gr_mem = &empty_list;
}
{
memzero (sgent, sizeof *sgent);
sgent->sg_name = group_name;
- sgent->sg_passwd = "!"; /* XXX warning: const */
+ if (pflg) {
+ sgent->sg_passwd = group_passwd;
+ } else {
+ sgent->sg_passwd = "!"; /* XXX warning: const */
+ }
sgent->sg_adm = &empty_list;
sgent->sg_mem = &empty_list;
}
struct sgrp sgrp;
#endif /* SHADOWGRP */
+ /*
+ * To add the group, we need to update /etc/group.
+ * Make sure failures will be reported.
+ */
+ add_cleanup (cleanup_report_add_group_group, group_name);
+#ifdef SHADOWGRP
+ if (is_shadow_grp) {
+ /* We also need to update /etc/gshadow */
+ add_cleanup (cleanup_report_add_group_gshadow, group_name);
+ }
+#endif
+
/*
* Create the initial entries for this new group.
*/
new_grent (&grp);
#ifdef SHADOWGRP
new_sgent (&sgrp);
+ if (is_shadow_grp && pflg) {
+ grp.gr_passwd = SHADOW_PASSWD_STRING; /* XXX warning: const */
+ }
#endif /* SHADOWGRP */
/*
* Write out the new group file entry.
*/
- if (!gr_update (&grp)) {
- fprintf (stderr, _("%s: error adding new group entry\n"), Prog);
- fail_exit (E_GRP_UPDATE);
+ if (gr_update (&grp) == 0) {
+ fprintf (stderr,
+ _("%s: failed to prepare the new %s entry '%s'\n"),
+ Prog, gr_dbname (), grp.gr_name);
+ exit (E_GRP_UPDATE);
}
#ifdef SHADOWGRP
/*
* Write out the new shadow group entries as well.
*/
- if (is_shadow_grp && !sgr_update (&sgrp)) {
- fprintf (stderr, _("%s: error adding new group entry\n"), Prog);
- fail_exit (E_GRP_UPDATE);
+ if (is_shadow_grp && (sgr_update (&sgrp) == 0)) {
+ fprintf (stderr,
+ _("%s: failed to prepare the new %s entry '%s'\n"),
+ Prog, sgr_dbname (), sgrp.sg_name);
+ exit (E_GRP_UPDATE);
}
#endif /* SHADOWGRP */
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "adding group", group_name,
- group_id, 1);
-#endif
- SYSLOG ((LOG_INFO, "new group: name=%s, GID=%u",
- group_name, (unsigned int) group_id));
-}
-
-/*
- * find_new_gid - find the next available GID
- *
- * find_new_gid() locates the next highest unused GID in the group
- * file, or checks the given group ID against the existing ones for
- * uniqueness.
- */
-static void find_new_gid (void)
-{
- const struct group *grp;
- gid_t gid_min, gid_max;
-
- gid_min = getdef_unum ("GID_MIN", 1000);
- gid_max = getdef_unum ("GID_MAX", 60000);
-
- /*
- * Start with some GID value if the user didn't provide us with
- * one already.
- */
-
- if (!gflg)
- group_id = gid_min;
-
- /*
- * Search the entire group file, either looking for this GID (if the
- * user specified one with -g) or looking for the largest unused
- * value.
- */
- setgrent ();
- while ((grp = getgrent ())) {
- if (strcmp (group_name, grp->gr_name) == 0) {
- if (fflg) {
- fail_exit (E_SUCCESS);
- }
- fprintf (stderr, _("%s: name %s is not unique\n"),
- Prog, group_name);
- fail_exit (E_NAME_IN_USE);
- }
- if (gflg && group_id == grp->gr_gid) {
- if (fflg) {
- /* turn off -g and search again */
- gflg = 0;
- setgrent ();
- continue;
- }
- fprintf (stderr, _("%s: GID %u is not unique\n"),
- Prog, (unsigned int) group_id);
- fail_exit (E_GID_IN_USE);
- }
- if (!gflg && grp->gr_gid >= group_id) {
- if (grp->gr_gid > gid_max)
- continue;
- group_id = grp->gr_gid + 1;
- }
- }
- if (!gflg && group_id == gid_max + 1) {
- for (group_id = gid_min; group_id < gid_max; group_id++) {
- /* local, no need for xgetgrgid */
- if (!getgrgid (group_id))
- break;
- }
- if (group_id == gid_max) {
- fprintf (stderr, _("%s: can't get unique GID\n"), Prog);
- fail_exit (E_GID_IN_USE);
- }
- }
}
/*
*/
static void check_new_name (void)
{
- if (check_group_name (group_name))
+ if (is_valid_group_name (group_name)) {
return;
+ }
/*
* All invalid group names land here.
*/
- fprintf (stderr, _("%s: %s is not a valid group name\n"),
- Prog, group_name);
+ fprintf (stderr, _("%s: '%s' is not a valid group name\n"),
+ Prog, group_name);
exit (E_BAD_ARG);
}
*/
static void close_files (void)
{
- if (!gr_close ()) {
- fprintf (stderr, _("%s: cannot rewrite group file\n"), Prog);
- fail_exit (E_GRP_UPDATE);
+ /* First, write the changes in the regular group database */
+ if (gr_close () == 0) {
+ fprintf (stderr,
+ _("%s: failure while writing changes to %s\n"),
+ Prog, gr_dbname ());
+ exit (E_GRP_UPDATE);
}
- gr_unlock ();
+#ifdef WITH_AUDIT
+ audit_logger (AUDIT_ADD_GROUP, Prog,
+ "adding group to /etc/group",
+ group_name, (unsigned int) group_id,
+ SHADOW_AUDIT_SUCCESS);
+#endif
+ SYSLOG ((LOG_INFO, "group added to %s: name=%s, GID=%u",
+ gr_dbname (), group_name, (unsigned int) group_id));
+ del_cleanup (cleanup_report_add_group_group);
+
+ cleanup_unlock_group (NULL);
+ del_cleanup (cleanup_unlock_group);
+
+ /* Now, write the changes in the shadow database */
#ifdef SHADOWGRP
- if (is_shadow_grp && !sgr_close ()) {
- fprintf (stderr,
- _("%s: cannot rewrite shadow group file\n"), Prog);
- fail_exit (E_GRP_UPDATE);
+ if (is_shadow_grp) {
+ if (sgr_close () == 0) {
+ fprintf (stderr,
+ _("%s: failure while writing changes to %s\n"),
+ Prog, sgr_dbname ());
+ exit (E_GRP_UPDATE);
+ }
+#ifdef WITH_AUDIT
+ audit_logger (AUDIT_ADD_GROUP, Prog,
+ "adding group to /etc/gshadow",
+ group_name, (unsigned int) group_id,
+ SHADOW_AUDIT_SUCCESS);
+#endif
+ SYSLOG ((LOG_INFO, "group added to %s: name=%s",
+ sgr_dbname (), group_name));
+ del_cleanup (cleanup_report_add_group_gshadow);
+
+ cleanup_unlock_gshadow (NULL);
+ del_cleanup (cleanup_unlock_gshadow);
}
- if (is_shadow_grp)
- sgr_unlock ();
#endif /* SHADOWGRP */
+
+ /* Report success at the system level */
+#ifdef WITH_AUDIT
+ audit_logger (AUDIT_ADD_GROUP, Prog,
+ "",
+ group_name, (unsigned int) group_id,
+ SHADOW_AUDIT_SUCCESS);
+#endif
+ SYSLOG ((LOG_INFO, "new group: name=%s, GID=%u",
+ group_name, (unsigned int) group_id));
+ del_cleanup (cleanup_report_add_group);
}
/*
*/
static void open_files (void)
{
- if (!gr_lock ()) {
- fprintf (stderr, _("%s: unable to lock group file\n"), Prog);
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "locking group file",
- group_name, -1, 0);
-#endif
+ /* First, lock the databases */
+ if (gr_lock () == 0) {
+ fprintf (stderr,
+ _("%s: cannot lock %s; try again later.\n"),
+ Prog, gr_dbname ());
exit (E_GRP_UPDATE);
}
- if (!gr_open (O_RDWR)) {
- fprintf (stderr, _("%s: unable to open group file\n"), Prog);
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "opening group file",
- group_name, -1, 0);
-#endif
- fail_exit (E_GRP_UPDATE);
- }
+ add_cleanup (cleanup_unlock_group, NULL);
+
#ifdef SHADOWGRP
- if (is_shadow_grp && !sgr_lock ()) {
- fprintf (stderr,
- _("%s: unable to lock shadow group file\n"), Prog);
- fail_exit (E_GRP_UPDATE);
- }
- if (is_shadow_grp && !sgr_open (O_RDWR)) {
- fprintf (stderr,
- _("%s: unable to open shadow group file\n"), Prog);
- fail_exit (E_GRP_UPDATE);
+ if (is_shadow_grp) {
+ if (sgr_lock () == 0) {
+ fprintf (stderr,
+ _("%s: cannot lock %s; try again later.\n"),
+ Prog, sgr_dbname ());
+ exit (E_GRP_UPDATE);
+ }
+ add_cleanup (cleanup_unlock_gshadow, NULL);
}
#endif /* SHADOWGRP */
-}
-/*
- * fail_exit - exit with an error code after unlocking files
- */
-static void fail_exit (int code)
-{
- (void) gr_unlock ();
+ /*
+ * Now if the group is not added, it's our fault.
+ * Make sure failures will be reported.
+ */
+ add_cleanup (cleanup_report_add_group, group_name);
+
+ /* And now open the databases */
+ 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_GRP_UPDATE);
+ }
+
#ifdef SHADOWGRP
- if (is_shadow_grp)
- sgr_unlock ();
-#endif
-#ifdef WITH_AUDIT
- if (code != E_SUCCESS)
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "adding group",
- group_name, -1, 0);
-#endif
- exit (code);
+ if (is_shadow_grp) {
+ 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_GRP_UPDATE);
+ }
+ }
+#endif /* SHADOWGRP */
}
/*
- * get_id - validate and get group ID
+ * process_flags - parse the command line options
+ *
+ * It will not return if an error is encountered.
*/
-static gid_t get_gid (const char *gidstr)
+static void process_flags (int argc, char **argv)
{
- long val;
- char *errptr;
-
- val = strtol (gidstr, &errptr, 10);
- if (*errptr || errno == ERANGE || val < 0) {
- fprintf (stderr, _("%s: invalid numeric argument '%s'\n"), Prog,
- gidstr);
- exit (E_BAD_ARG);
+ /*
+ * Parse the command line options.
+ */
+ char *cp;
+ int option_index = 0;
+ int c;
+ static struct option long_options[] = {
+ {"force", no_argument, NULL, 'f'},
+ {"gid", required_argument, NULL, 'g'},
+ {"help", no_argument, NULL, 'h'},
+ {"key", required_argument, NULL, 'K'},
+ {"non-unique", no_argument, NULL, 'o'},
+ {"password", required_argument, NULL, 'p'},
+ {"system", no_argument, NULL, 'r'},
+ {NULL, 0, NULL, '\0'}
+ };
+
+ while ((c =
+ getopt_long (argc, argv, "fg:hK:op:r", long_options,
+ &option_index)) != -1) {
+ switch (c) {
+ case 'f':
+ /*
+ * "force" - do nothing, just exit(0), if the
+ * specified group already exists. With -g, if
+ * specified gid already exists, choose another
+ * (unique) gid (turn off -g). Based on the RedHat's
+ * patch from shadow-utils-970616-9.
+ */
+ fflg = true;
+ break;
+ case 'g':
+ gflg = true;
+ if ( (get_gid (optarg, &group_id) == 0)
+ || (group_id == (gid_t)-1)) {
+ fprintf (stderr,
+ _("%s: invalid group ID '%s'\n"),
+ Prog, optarg);
+ exit (E_BAD_ARG);
+ }
+ break;
+ case 'h':
+ usage (E_SUCCESS);
+ break;
+ case 'K':
+ /*
+ * override login.defs defaults (-K name=value)
+ * example: -K GID_MIN=100 -K GID_MAX=499
+ * note: -K GID_MIN=10,GID_MAX=499 doesn't work yet
+ */
+ cp = strchr (optarg, '=');
+ if (NULL == cp) {
+ fprintf (stderr,
+ _("%s: -K requires KEY=VALUE\n"),
+ Prog);
+ exit (E_BAD_ARG);
+ }
+ /* terminate name, point to value */
+ *cp++ = '\0';
+ if (putdef_str (optarg, cp) < 0) {
+ exit (E_BAD_ARG);
+ }
+ break;
+ case 'o':
+ oflg = true;
+ break;
+ case 'p':
+ pflg = true;
+ group_passwd = optarg;
+ break;
+ case 'r':
+ rflg = true;
+ break;
+ default:
+ usage (E_USAGE);
+ }
}
- return val;
+
+ /*
+ * Check the flags consistency
+ */
+ if (optind != argc - 1) {
+ usage (E_USAGE);
+ }
+ group_name = argv[optind];
+
+ check_flags ();
}
/*
- * main - groupadd command
+ * check_flags - check flags and parameters consistency
+ *
+ * It will not return if an error is encountered.
*/
-
-int main (int argc, char **argv)
+static void check_flags (void)
{
-#ifdef USE_PAM
- pam_handle_t *pamh = NULL;
- int retval;
-#endif
+ /* -o does not make sense without -g */
+ if (oflg && !gflg) {
+ usage (E_USAGE);
+ }
+
+ check_new_name ();
-#ifdef WITH_AUDIT
- audit_help_open ();
-#endif
/*
- * Get my name so that I can use it to report errors.
+ * Check if the group already exist.
*/
- Prog = Basename (argv[0]);
-
- setlocale (LC_ALL, "");
- bindtextdomain (PACKAGE, LOCALEDIR);
- textdomain (PACKAGE);
-
- OPENLOG ("groupadd");
+ /* local, no need for xgetgrnam */
+ if (getgrnam (group_name) != NULL) {
+ /* The group already exist */
+ if (fflg) {
+ /* OK, no need to do anything */
+ exit (E_SUCCESS);
+ }
+ fprintf (stderr,
+ _("%s: group '%s' already exists\n"),
+ Prog, group_name);
+ exit (E_NAME_IN_USE);
+ }
- {
- /*
- * Parse the command line options.
+ if (gflg && (getgrgid (group_id) != NULL)) {
+ /* A GID was specified, and a group already exist with that GID
+ * - either we will use this GID anyway (-o)
+ * - either we ignore the specified GID and
+ * we will use another one (-f)
+ * - either it is a failure
*/
- char *cp;
- int option_index = 0;
- int c;
- static struct option long_options[] = {
- {"force", no_argument, NULL, 'f'},
- {"gid", required_argument, NULL, 'g'},
- {"help", no_argument, NULL, 'h'},
- {"key", required_argument, NULL, 'K'},
- {"non-unique", required_argument, NULL, 'o'},
- {NULL, 0, NULL, '\0'}
- };
-
- while ((c =
- getopt_long (argc, argv, "fg:hK:o", long_options,
- &option_index)) != -1) {
- switch (c) {
- case 'f':
- /*
- * "force" - do nothing, just exit(0), if the
- * specified group already exists. With -g, if
- * specified gid already exists, choose another
- * (unique) gid (turn off -g). Based on the RedHat's
- * patch from shadow-utils-970616-9.
- */
- fflg++;
- break;
- case 'g':
- gflg++;
- group_id = get_gid (optarg);
- break;
- case 'h':
- usage ();
- break;
- case 'K':
- /*
- * override login.defs defaults (-K name=value)
- * example: -K GID_MIN=100 -K GID_MAX=499
- * note: -K GID_MIN=10,GID_MAX=499 doesn't work yet
- */
- cp = strchr (optarg, '=');
- if (!cp) {
- fprintf (stderr,
- _
- ("%s: -K requires KEY=VALUE\n"),
- Prog);
- exit (E_BAD_ARG);
- }
- /* terminate name, point to value */
- *cp++ = '\0';
- if (putdef_str (optarg, cp) < 0)
- exit (E_BAD_ARG);
- break;
- case 'o':
- oflg++;
- break;
- default:
- usage ();
- }
+ if (oflg) {
+ /* Continue with this GID */
+ } else if (fflg) {
+ /* Turn off -g, we can use any GID */
+ gflg = false;
+ } else {
+ fprintf (stderr,
+ _("%s: GID '%lu' already exists\n"),
+ Prog, (unsigned long int) group_id);
+ exit (E_GID_IN_USE);
}
}
+}
- if (oflg && !gflg)
- usage ();
-
- if (optind != argc - 1)
- usage ();
-
- group_name = argv[argc - 1];
- check_new_name ();
-
+/*
+ * check_perms - check if the caller is allowed to add a group
+ *
+ * With PAM support, the setuid bit can be set on groupadd to allow
+ * non-root users to groups.
+ * Without PAM support, only users who can write in the group databases
+ * can add groups.
+ *
+ * It will not return if the user is not allowed.
+ */
+static void check_perms (void)
+{
+#ifdef ACCT_TOOLS_SETUID
#ifdef USE_PAM
- retval = PAM_SUCCESS;
-
- {
- struct passwd *pampw;
- pampw = getpwuid (getuid ()); /* local, no need for xgetpwuid */
- if (pampw == NULL) {
- retval = PAM_USER_UNKNOWN;
- }
+ pam_handle_t *pamh = NULL;
+ int retval;
+ struct passwd *pampw;
- if (retval == PAM_SUCCESS) {
- retval = pam_start ("groupadd", pampw->pw_name,
- &conv, &pamh);
- }
+ pampw = getpwuid (getuid ()); /* local, no need for xgetpwuid */
+ if (NULL == pampw) {
+ fprintf (stderr,
+ _("%s: Cannot determine your user name.\n"),
+ Prog);
+ exit (1);
}
- if (retval == PAM_SUCCESS) {
+ retval = pam_start ("groupadd", pampw->pw_name, &conv, &pamh);
+
+ if (PAM_SUCCESS == retval) {
retval = pam_authenticate (pamh, 0);
- if (retval != PAM_SUCCESS) {
- pam_end (pamh, retval);
- }
}
- if (retval == PAM_SUCCESS) {
+ if (PAM_SUCCESS == retval) {
retval = pam_acct_mgmt (pamh, 0);
- if (retval != PAM_SUCCESS) {
- pam_end (pamh, retval);
- }
}
- if (retval != PAM_SUCCESS) {
+ if (NULL != pamh) {
+ (void) pam_end (pamh, retval);
+ }
+ if (PAM_SUCCESS != retval) {
fprintf (stderr, _("%s: PAM authentication failed\n"), Prog);
exit (1);
}
#endif /* USE_PAM */
+#endif /* ACCT_TOOLS_SETUID */
+}
-#ifdef SHADOWGRP
- is_shadow_grp = sgr_file_present ();
+/*
+ * main - groupadd command
+ */
+int main (int argc, char **argv)
+{
+#ifdef WITH_AUDIT
+ audit_help_open ();
#endif
+ atexit (do_cleanups);
+
+ /*
+ * Get my name so that I can use it to report errors.
+ */
+ Prog = Basename (argv[0]);
+
+ (void) setlocale (LC_ALL, "");
+ (void) bindtextdomain (PACKAGE, LOCALEDIR);
+ (void) textdomain (PACKAGE);
+
+ OPENLOG ("groupadd");
/*
- * Start with a quick check to see if the group exists.
+ * Parse the command line options.
*/
- if (getgrnam (group_name)) { /* local, no need for xgetgrnam */
- if (fflg) {
- exit (E_SUCCESS);
- }
- fprintf (stderr, _("%s: group %s exists\n"), Prog, group_name);
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "adding group",
- group_name, -1, 0);
+ process_flags (argc, argv);
+
+ check_perms ();
+
+#ifdef SHADOWGRP
+ is_shadow_grp = sgr_file_present ();
#endif
- exit (E_NAME_IN_USE);
- }
/*
* Do the hard stuff - open the files, create the group entries,
*/
open_files ();
- if (!gflg || !oflg)
- find_new_gid ();
+ if (!gflg) {
+ if (find_new_gid (rflg, &group_id, NULL) < 0) {
+ exit (E_GID_IN_USE);
+ }
+ }
grp_update ();
close_files ();
nscd_flush_cache ("group");
-#ifdef USE_PAM
- if (retval == PAM_SUCCESS)
- pam_end (pamh, PAM_SUCCESS);
-#endif /* USE_PAM */
exit (E_SUCCESS);
- /* NOT REACHED */
+ /*@notreached@*/
}
+
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