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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 12:50:00 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 12:50:00 +0000 |
commit | 333f7ecfa3e040191c66b2b92f6c117ca2cbac1d (patch) | |
tree | 178a8f140927896970f47930dae9213161268f10 /src/groupmod.c | |
parent | Initial commit. (diff) | |
download | shadow-333f7ecfa3e040191c66b2b92f6c117ca2cbac1d.tar.xz shadow-333f7ecfa3e040191c66b2b92f6c117ca2cbac1d.zip |
Adding upstream version 1:4.8.1.upstream/1%4.8.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/groupmod.c | 885 |
1 files changed, 885 insertions, 0 deletions
diff --git a/src/groupmod.c b/src/groupmod.c new file mode 100644 index 0000000..1dca5fc --- /dev/null +++ b/src/groupmod.c @@ -0,0 +1,885 @@ +/* + * Copyright (c) 1991 - 1994, Julianne Frances Haugh + * Copyright (c) 1996 - 2000, Marek Michałkiewicz + * Copyright (c) 2000 - 2006, Tomasz Kłoczko + * Copyright (c) 2007 - 2011, Nicolas François + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the copyright holders or contributors may not be used to + * endorse or promote products derived from this software without + * specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A + * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <config.h> + +#ident "$Id$" + +#include <ctype.h> +#include <fcntl.h> +#include <getopt.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 "groupio.h" +#include "pwio.h" +#include "nscd.h" +#include "sssd.h" +#include "prototypes.h" +#ifdef SHADOWGRP +#include "sgroupio.h" +#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 */ +#define E_GID_IN_USE 4 /* gid already in use (and no -o) */ +#define E_NOTFOUND 6 /* specified group doesn't exist */ +#define E_NAME_IN_USE 9 /* group name already in use */ +#define E_GRP_UPDATE 10 /* can't update group file */ +#define E_CLEANUP_SERVICE 11 /* can't setup cleanup service */ +#define E_PAM_USERNAME 12 /* can't determine your username for use with pam */ +#define E_PAM_ERROR 13 /* pam returned an error, see Syslog facility id groupmod */ + + +/* + * Global variables + */ +const char *Prog; + +#ifdef SHADOWGRP +static bool is_shadow_grp; +#endif /* SHADOWGRP */ +static char *group_name; +static char *group_newname; +static char *group_passwd; +static gid_t group_id; +static gid_t group_newid; + +static const char* prefix = ""; + +static struct cleanup_info_mod info_passwd; +static struct cleanup_info_mod info_group; +#ifdef SHADOWGRP +static struct cleanup_info_mod info_gshadow; +#endif + +static bool + oflg = false, /* permit non-unique group ID to be specified with -g */ + gflg = false, /* new ID value for the group */ + nflg = false, /* a new name has been specified for the group */ + pflg = false; /* new encrypted password */ + +/* local function prototypes */ +static void usage (int status); +static void new_grent (struct group *); + +#ifdef SHADOWGRP +static void new_sgent (struct sgrp *); +#endif +static void grp_update (void); +static void check_new_gid (void); +static void check_new_name (void); +static void process_flags (int, char **); +static void lock_files (void); +static void prepare_failure_reports (void); +static void open_files (void); +static void close_files (void); +static void update_primary_groups (gid_t ogid, gid_t ngid); + +/* + * usage - display usage message and exit + */ + +static void usage (int status) +{ + FILE *usageout = (E_SUCCESS != status) ? stderr : stdout; + (void) fprintf (usageout, + _("Usage: %s [options] GROUP\n" + "\n" + "Options:\n"), + Prog); + (void) fputs (_(" -g, --gid GID change the group ID to GID\n"), usageout); + (void) fputs (_(" -h, --help display this help message and exit\n"), usageout); + (void) fputs (_(" -n, --new-name NEW_GROUP change the name to NEW_GROUP\n"), usageout); + (void) fputs (_(" -o, --non-unique allow to use a duplicate (non-unique) GID\n"), usageout); + (void) fputs (_(" -p, --password PASSWORD change the password to this (encrypted)\n" + " PASSWORD\n"), usageout); + (void) fputs (_(" -R, --root CHROOT_DIR directory to chroot into\n"), usageout); + (void) fputs (_(" -P, --prefix PREFIX_DIR prefix directory where are located the /etc/* files\n"), usageout); + (void) fputs ("\n", usageout); + exit (status); +} + +/* + * new_grent - updates the values in a group file entry + * + * new_grent() takes all of the values that have been entered and fills + * in a (struct group) with them. + */ +static void new_grent (struct group *grent) +{ + if (nflg) { + grent->gr_name = xstrdup (group_newname); + } + + if (gflg) { + grent->gr_gid = group_newid; + } + + if ( pflg +#ifdef SHADOWGRP + && ( (!is_shadow_grp) + || (strcmp (grent->gr_passwd, SHADOW_PASSWD_STRING) != 0)) +#endif + ) { + /* Update the password in group if there is no gshadow + * file or if the password is currently in group + * (gr_passwd != "x"). We do not force the usage of + * shadow passwords if it was not the case before. + */ + grent->gr_passwd = group_passwd; + } +} + +#ifdef SHADOWGRP +/* + * new_sgent - updates the values in a shadow group file entry + * + * new_sgent() takes all of the values that have been entered and fills + * in a (struct sgrp) with them. + */ +static void new_sgent (struct sgrp *sgent) +{ + if (nflg) { + sgent->sg_name = xstrdup (group_newname); + } + + /* Always update the shadowed password if there is a shadow entry + * (even if shadowed passwords might not be enabled for this group + * (gr_passwd != "x")). + * It seems better to update the password in both places in case a + * shadow and a non shadow entry exist. + * This might occur only if there were already both entries. + */ + if (pflg) { + sgent->sg_passwd = group_passwd; + } +} +#endif /* SHADOWGRP */ + +/* + * grp_update - update group file entries + * + * grp_update() updates the new records in the memory databases. + */ +static void grp_update (void) +{ + struct group grp; + const struct group *ogrp; + +#ifdef SHADOWGRP + struct sgrp sgrp; + const struct sgrp *osgrp = NULL; +#endif /* SHADOWGRP */ + + /* + * Get the current settings for this group. + */ + ogrp = gr_locate (group_name); + if (NULL == ogrp) { + fprintf (stderr, + _("%s: group '%s' does not exist in %s\n"), + Prog, group_name, gr_dbname ()); + exit (E_GRP_UPDATE); + } + grp = *ogrp; + new_grent (&grp); +#ifdef SHADOWGRP + if ( is_shadow_grp + && (pflg || nflg)) { + osgrp = sgr_locate (group_name); + if (NULL != osgrp) { + sgrp = *osgrp; + new_sgent (&sgrp); + } else if ( pflg + && (strcmp (grp.gr_passwd, SHADOW_PASSWD_STRING) == 0)) { + static char *empty = NULL; + /* If there is a gshadow file with no entries for + * the group, but the group file indicates a + * shadowed password, we force the creation of a + * gshadow entry when a new password is requested. + */ + memset (&sgrp, 0, sizeof sgrp); + sgrp.sg_name = xstrdup (grp.gr_name); + sgrp.sg_passwd = xstrdup (grp.gr_passwd); + sgrp.sg_adm = ∅ + sgrp.sg_mem = dup_list (grp.gr_mem); + new_sgent (&sgrp); + osgrp = &sgrp; /* entry needs to be committed */ + } + } +#endif /* SHADOWGRP */ + + if (gflg) { + update_primary_groups (ogrp->gr_gid, group_newid); + } + + /* + * Write out the new group file entry. + */ + 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); + } + if (nflg && (gr_remove (group_name) == 0)) { + fprintf (stderr, + _("%s: cannot remove entry '%s' from %s\n"), + Prog, grp.gr_name, gr_dbname ()); + exit (E_GRP_UPDATE); + } + +#ifdef SHADOWGRP + /* + * Make sure there was a shadow entry to begin with. + */ + if (NULL != osgrp) { + /* + * Write out the new shadow group entries as well. + */ + if (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); + } + if (nflg && (sgr_remove (group_name) == 0)) { + fprintf (stderr, + _("%s: cannot remove entry '%s' from %s\n"), + Prog, group_name, sgr_dbname ()); + exit (E_GRP_UPDATE); + } + } +#endif /* SHADOWGRP */ +} + +/* + * check_new_gid - check the new GID value for uniqueness + * + * check_new_gid() insures that the new GID value is unique. + */ +static void check_new_gid (void) +{ + /* + * First, the easy stuff. If the ID can be duplicated, or if the ID + * didn't really change, just return. If the ID didn't change, turn + * off those flags. No sense doing needless work. + */ + if (group_id == group_newid) { + gflg = 0; + return; + } + + if (oflg || + (getgrgid (group_newid) == NULL) /* local, no need for xgetgrgid */ + ) { + return; + } + + /* + * Tell the user what they did wrong. + */ + fprintf (stderr, + _("%s: GID '%lu' already exists\n"), + Prog, (unsigned long int) group_newid); + exit (E_GID_IN_USE); +} + +/* + * check_new_name - check the new name for uniqueness + * + * check_new_name() insures that the new name does not exist already. + * You can't have the same name twice, period. + */ +static void check_new_name (void) +{ + /* + * Make sure they are actually changing the name. + */ + if (strcmp (group_name, group_newname) == 0) { + nflg = 0; + return; + } + + if (is_valid_group_name (group_newname)) { + + /* + * If the entry is found, too bad. + */ + /* local, no need for xgetgrnam */ + if (prefix_getgrnam (group_newname) != NULL) { + fprintf (stderr, + _("%s: group '%s' already exists\n"), + Prog, group_newname); + exit (E_NAME_IN_USE); + } + return; + } + + /* + * All invalid group names land here. + */ + + fprintf (stderr, + _("%s: invalid group name '%s'\n"), + Prog, group_newname); + exit (E_BAD_ARG); +} + +/* + * process_flags - perform command line argument setting + * + * process_flags() interprets the command line arguments and sets the + * values that the user will be created with accordingly. The values + * are checked for sanity. + */ +static void process_flags (int argc, char **argv) +{ + int c; + static struct option long_options[] = { + {"gid", required_argument, NULL, 'g'}, + {"help", no_argument, NULL, 'h'}, + {"new-name", required_argument, NULL, 'n'}, + {"non-unique", no_argument, NULL, 'o'}, + {"password", required_argument, NULL, 'p'}, + {"root", required_argument, NULL, 'R'}, + {"prefix", required_argument, NULL, 'P'}, + {NULL, 0, NULL, '\0'} + }; + while ((c = getopt_long (argc, argv, "g:hn:op:R:P:", + long_options, NULL)) != -1) { + switch (c) { + case 'g': + gflg = true; + if ( (get_gid (optarg, &group_newid) == 0) + || (group_newid == (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 'n': + nflg = true; + group_newname = optarg; + break; + case 'o': + oflg = true; + break; + case 'p': + group_passwd = optarg; + pflg = true; + break; + case 'R': /* no-op, handled in process_root_flag () */ + break; + case 'P': /* no-op, handled in process_prefix_flag () */ + break; + default: + usage (E_USAGE); + } + } + + if (oflg && !gflg) { + usage (E_USAGE); + } + + if (optind != (argc - 1)) { + usage (E_USAGE); + } + + group_name = argv[argc - 1]; +} + +/* + * close_files - close all of the files that were opened + * + * close_files() closes all of the files that were opened for this new + * group. This causes any modified entries to be written out. + */ +static void close_files (void) +{ + if (gr_close () == 0) { + fprintf (stderr, + _("%s: failure while writing changes to %s\n"), + Prog, gr_dbname ()); + exit (E_GRP_UPDATE); + } +#ifdef WITH_AUDIT + audit_logger (AUDIT_USER_ACCT, Prog, + info_group.audit_msg, + group_name, AUDIT_NO_ID, + SHADOW_AUDIT_SUCCESS); +#endif + SYSLOG ((LOG_INFO, + "group changed in %s (%s)", + gr_dbname (), info_group.action)); + del_cleanup (cleanup_report_mod_group); + + cleanup_unlock_group (NULL); + del_cleanup (cleanup_unlock_group); + +#ifdef SHADOWGRP + if ( is_shadow_grp + && (pflg || nflg)) { + 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_USER_ACCT, Prog, + info_gshadow.audit_msg, + group_name, AUDIT_NO_ID, + SHADOW_AUDIT_SUCCESS); +#endif + SYSLOG ((LOG_INFO, + "group changed in %s (%s)", + sgr_dbname (), info_gshadow.action)); + del_cleanup (cleanup_report_mod_gshadow); + + cleanup_unlock_gshadow (NULL); + del_cleanup (cleanup_unlock_gshadow); + } +#endif /* SHADOWGRP */ + + if (gflg) { + if (pw_close () == 0) { + fprintf (stderr, + _("%s: failure while writing changes to %s\n"), + Prog, pw_dbname ()); + exit (E_GRP_UPDATE); + } +#ifdef WITH_AUDIT + audit_logger (AUDIT_USER_ACCT, Prog, + info_passwd.audit_msg, + group_name, AUDIT_NO_ID, + SHADOW_AUDIT_SUCCESS); +#endif + SYSLOG ((LOG_INFO, + "group changed in %s (%s)", + pw_dbname (), info_passwd.action)); + del_cleanup (cleanup_report_mod_passwd); + + cleanup_unlock_passwd (NULL); + del_cleanup (cleanup_unlock_passwd); + } + +#ifdef WITH_AUDIT + audit_logger (AUDIT_USER_ACCT, Prog, + "modifying group", + group_name, AUDIT_NO_ID, + SHADOW_AUDIT_SUCCESS); +#endif +} + +/* + * prepare_failure_reports - Prepare the cleanup_info structure for logging + * of success and failure to syslog or audit. + */ +static void prepare_failure_reports (void) +{ + info_group.name = group_name; +#ifdef SHADOWGRP + info_gshadow.name = group_name; +#endif + info_passwd.name = group_name; + + info_group.audit_msg = xmalloc (512); +#ifdef SHADOWGRP + info_gshadow.audit_msg = xmalloc (512); +#endif + info_passwd.audit_msg = xmalloc (512); + + (void) snprintf (info_group.audit_msg, 511, + "changing %s; ", gr_dbname ()); +#ifdef SHADOWGRP + (void) snprintf (info_gshadow.audit_msg, 511, + "changing %s; ", sgr_dbname ()); +#endif + (void) snprintf (info_passwd.audit_msg, 511, + "changing %s; ", pw_dbname ()); + + info_group.action = info_group.audit_msg + + strlen (info_group.audit_msg); +#ifdef SHADOWGRP + info_gshadow.action = info_gshadow.audit_msg + + strlen (info_gshadow.audit_msg); +#endif + info_passwd.action = info_passwd.audit_msg + + strlen (info_passwd.audit_msg); + + (void) snprintf (info_group.action, + 511 - strlen (info_group.audit_msg), + "group %s/%lu", + group_name, (unsigned long int) group_id); +#ifdef SHADOWGRP + (void) snprintf (info_gshadow.action, + 511 - strlen (info_group.audit_msg), + "group %s", group_name); +#endif + (void) snprintf (info_passwd.action, + 511 - strlen (info_group.audit_msg), + "group %s/%lu", + group_name, (unsigned long int) group_id); + + if (nflg) { + strncat (info_group.action, ", new name: ", + 511 - strlen (info_group.audit_msg)); + strncat (info_group.action, group_newname, + 511 - strlen (info_group.audit_msg)); + +#ifdef SHADOWGRP + strncat (info_gshadow.action, ", new name: ", + 511 - strlen (info_gshadow.audit_msg)); + strncat (info_gshadow.action, group_newname, + 511 - strlen (info_gshadow.audit_msg)); +#endif + + strncat (info_passwd.action, ", new name: ", + 511 - strlen (info_passwd.audit_msg)); + strncat (info_passwd.action, group_newname, + 511 - strlen (info_passwd.audit_msg)); + } + if (pflg) { + strncat (info_group.action, ", new password", + 511 - strlen (info_group.audit_msg)); + +#ifdef SHADOWGRP + strncat (info_gshadow.action, ", new password", + 511 - strlen (info_gshadow.audit_msg)); +#endif + } + if (gflg) { + strncat (info_group.action, ", new gid: ", + 511 - strlen (info_group.audit_msg)); + (void) snprintf (info_group.action+strlen (info_group.action), + 511 - strlen (info_group.audit_msg), + "%lu", (unsigned long int) group_newid); + + strncat (info_passwd.action, ", new gid: ", + 511 - strlen (info_passwd.audit_msg)); + (void) snprintf (info_passwd.action+strlen (info_passwd.action), + 511 - strlen (info_passwd.audit_msg), + "%lu", (unsigned long int) group_newid); + } + info_group.audit_msg[511] = '\0'; +#ifdef SHADOWGRP + info_gshadow.audit_msg[511] = '\0'; +#endif + info_passwd.audit_msg[511] = '\0'; + +// FIXME: add a system cleanup + add_cleanup (cleanup_report_mod_group, &info_group); +#ifdef SHADOWGRP + if ( is_shadow_grp + && (pflg || nflg)) { + add_cleanup (cleanup_report_mod_gshadow, &info_gshadow); + } +#endif + if (gflg) { + add_cleanup (cleanup_report_mod_passwd, &info_passwd); + } + +} + +/* + * lock_files - lock the accounts databases + * + * lock_files() locks the group, gshadow, and passwd databases. + */ +static void lock_files (void) +{ + if (gr_lock () == 0) { + fprintf (stderr, + _("%s: cannot lock %s; try again later.\n"), + Prog, gr_dbname ()); + exit (E_GRP_UPDATE); + } + add_cleanup (cleanup_unlock_group, NULL); + +#ifdef SHADOWGRP + if ( is_shadow_grp + && (pflg || nflg)) { + 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 + + if (gflg) { + if (pw_lock () == 0) { + fprintf (stderr, + _("%s: cannot lock %s; try again later.\n"), + Prog, pw_dbname ()); + exit (E_GRP_UPDATE); + } + add_cleanup (cleanup_unlock_passwd, NULL); + } +} + + +/* + * open_files - open the accounts databases + * + * open_files() opens the group, gshadow, and passwd databases. + */ +static void open_files (void) +{ + if (gr_open (O_CREAT | 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 + && (pflg || nflg)) { + if (sgr_open (O_CREAT | 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 */ + + if (gflg) { + if (pw_open (O_CREAT | O_RDWR) == 0) { + fprintf (stderr, + _("%s: cannot open %s\n"), + Prog, pw_dbname ()); + SYSLOG ((LOG_WARN, "cannot open %s", gr_dbname ())); + exit (E_GRP_UPDATE); + } + } +} + +void update_primary_groups (gid_t ogid, gid_t ngid) +{ + struct passwd *pwd; + + prefix_setpwent (); + while ((pwd = prefix_getpwent ()) != NULL) { + if (pwd->pw_gid == ogid) { + const struct passwd *lpwd; + struct passwd npwd; + lpwd = pw_locate (pwd->pw_name); + if (NULL == lpwd) { + fprintf (stderr, + _("%s: user '%s' does not exist in %s\n"), + Prog, pwd->pw_name, pw_dbname ()); + exit (E_GRP_UPDATE); + } else { + npwd = *lpwd; + npwd.pw_gid = ngid; + if (pw_update (&npwd) == 0) { + fprintf (stderr, + _("%s: failed to prepare the new %s entry '%s'\n"), + Prog, pw_dbname (), npwd.pw_name); + exit (E_GRP_UPDATE); + } + } + } + } + prefix_endpwent (); +} + +/* + * main - groupmod command + * + */ +int main (int argc, char **argv) +{ +#ifdef ACCT_TOOLS_SETUID +#ifdef USE_PAM + pam_handle_t *pamh = NULL; + int retval; +#endif /* USE_PAM */ +#endif /* ACCT_TOOLS_SETUID */ + + /* + * 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); + + process_root_flag ("-R", argc, argv); + prefix = process_prefix_flag ("-P", argc, argv); + + OPENLOG ("groupmod"); +#ifdef WITH_AUDIT + audit_help_open (); +#endif + + if (atexit (do_cleanups) != 0) { + fprintf (stderr, + _("%s: Cannot setup cleanup service.\n"), + Prog); + exit (E_CLEANUP_SERVICE); + } + + process_flags (argc, argv); + +#ifdef ACCT_TOOLS_SETUID +#ifdef USE_PAM + { + struct passwd *pampw; + pampw = getpwuid (getuid ()); /* local, no need for xgetpwuid */ + if (NULL == pampw) { + fprintf (stderr, + _("%s: Cannot determine your user name.\n"), + Prog); + exit (E_PAM_USERNAME); + } + + retval = pam_start ("groupmod", pampw->pw_name, &conv, &pamh); + } + + if (PAM_SUCCESS == retval) { + retval = pam_authenticate (pamh, 0); + } + + if (PAM_SUCCESS == retval) { + retval = pam_acct_mgmt (pamh, 0); + } + + if (PAM_SUCCESS != retval) { + fprintf (stderr, _("%s: PAM: %s\n"), + Prog, pam_strerror (pamh, retval)); + SYSLOG((LOG_ERR, "%s", pam_strerror (pamh, retval))); + if (NULL != pamh) { + (void) pam_end (pamh, retval); + } + exit (E_PAM_ERROR); + } + (void) pam_end (pamh, retval); +#endif /* USE_PAM */ +#endif /* ACCT_TOOLS_SETUID */ + +#ifdef SHADOWGRP + is_shadow_grp = sgr_file_present (); +#endif + { + struct group *grp; + /* + * Start with a quick check to see if the group exists. + */ + grp = prefix_getgrnam (group_name); /* local, no need for xgetgrnam */ + if (NULL == grp) { + fprintf (stderr, + _("%s: group '%s' does not exist\n"), + Prog, group_name); + exit (E_NOTFOUND); + } else { + group_id = grp->gr_gid; + } + } + +#ifdef USE_NIS + /* + * Now make sure it isn't an NIS group. + */ + if (__isgrNIS ()) { + char *nis_domain; + char *nis_master; + + fprintf (stderr, + _("%s: group %s is a NIS group\n"), + Prog, group_name); + + if (!yp_get_default_domain (&nis_domain) && + !yp_master (nis_domain, "group.byname", &nis_master)) { + fprintf (stderr, + _("%s: %s is the NIS master\n"), + Prog, nis_master); + } + exit (E_NOTFOUND); + } +#endif + + if (gflg) { + check_new_gid (); + } + + if (nflg) { + check_new_name (); + } + + lock_files (); + + /* + * Now if the group is not changed, it's our fault. + * Make sure failures will be reported. + */ + prepare_failure_reports (); + + /* + * Do the hard stuff - open the files, create the group entries, + * then close and update the files. + */ + open_files (); + + grp_update (); + + close_files (); + + nscd_flush_cache ("group"); + sssd_flush_cache (SSSD_DB_GROUP); + + return E_SUCCESS; +} + |