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Diffstat (limited to 'src/grpunconv.c')
| -rw-r--r-- | src/grpunconv.c | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/src/grpunconv.c b/src/grpunconv.c new file mode 100644 index 0000000..fc6cecf --- /dev/null +++ b/src/grpunconv.c @@ -0,0 +1,232 @@ +/* + * SPDX-FileCopyrightText: 1996 , Michael Meskes + * SPDX-FileCopyrightText: 1996 - 2000, Marek Michałkiewicz + * SPDX-FileCopyrightText: 2002 - 2006, Tomasz Kłoczko + * SPDX-FileCopyrightText: 2008 - 2011, Nicolas François + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +/* + * grpunconv - update /etc/group with information from /etc/gshadow. + * + */ + +#include <config.h> + +#ident "$Id$" + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <fcntl.h> +#include <time.h> +#include <unistd.h> +#include <grp.h> +#include <getopt.h> +#include "nscd.h" +#include "sssd.h" +#include "prototypes.h" +/*@-exitarg@*/ +#include "exitcodes.h" +#ifdef SHADOWGRP +#include "groupio.h" +#include "sgroupio.h" +#include "shadowlog.h" +/* + * Global variables + */ +const char *Prog; + +static bool gr_locked = false; +static bool sgr_locked = false; + +/* local function prototypes */ +static void fail_exit (int status); +static void usage (int status); +static void process_flags (int argc, char **argv); + +static void fail_exit (int status) +{ + if (gr_locked) { + if (gr_unlock () == 0) { + fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, gr_dbname ()); + SYSLOG ((LOG_ERR, "failed to unlock %s", gr_dbname ())); + /* continue */ + } + } + + if (sgr_locked) { + if (sgr_unlock () == 0) { + fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, sgr_dbname ()); + SYSLOG ((LOG_ERR, "failed to unlock %s", sgr_dbname ())); + /* continue */ + } + } + + exit (status); +} + +static void usage (int status) +{ + FILE *usageout = (E_SUCCESS != status) ? stderr : stdout; + (void) fprintf (usageout, + _("Usage: %s [options]\n" + "\n" + "Options:\n"), + Prog); + (void) fputs (_(" -h, --help display this help message and exit\n"), usageout); + (void) fputs (_(" -R, --root CHROOT_DIR directory to chroot into\n"), usageout); + (void) fputs ("\n", usageout); + exit (status); +} + +/* + * process_flags - parse the command line options + * + * It will not return if an error is encountered. + */ +static void process_flags (int argc, char **argv) +{ + /* + * Parse the command line options. + */ + int c; + static struct option long_options[] = { + {"help", no_argument, NULL, 'h'}, + {"root", required_argument, NULL, 'R'}, + {NULL, 0, NULL, '\0'} + }; + + while ((c = getopt_long (argc, argv, "hR:", + long_options, NULL)) != -1) { + switch (c) { + case 'h': + usage (E_SUCCESS); + /*@notreached@*/break; + case 'R': /* no-op, handled in process_root_flag () */ + break; + default: + usage (E_USAGE); + } + } + + if (optind != argc) { + usage (E_USAGE); + } +} + +int main (int argc, char **argv) +{ + const struct group *gr; + struct group grent; + const struct sgrp *sg; + + Prog = Basename (argv[0]); + log_set_progname(Prog); + log_set_logfd(stderr); + + (void) setlocale (LC_ALL, ""); + (void) bindtextdomain (PACKAGE, LOCALEDIR); + (void) textdomain (PACKAGE); + + process_root_flag ("-R", argc, argv); + + OPENLOG ("grpunconv"); + + process_flags (argc, argv); + + if (sgr_file_present () == 0) { + exit (0); /* no /etc/gshadow, nothing to do */ + } + + if (gr_lock () == 0) { + fprintf (stderr, + _("%s: cannot lock %s; try again later.\n"), + Prog, gr_dbname ()); + fail_exit (5); + } + gr_locked = true; + if (gr_open (O_CREAT | O_RDWR) == 0) { + fprintf (stderr, + _("%s: cannot open %s\n"), Prog, gr_dbname ()); + fail_exit (1); + } + + if (sgr_lock () == 0) { + fprintf (stderr, + _("%s: cannot lock %s; try again later.\n"), + Prog, sgr_dbname ()); + fail_exit (5); + } + sgr_locked = true; + if (sgr_open (O_RDONLY) == 0) { + fprintf (stderr, + _("%s: cannot open %s\n"), Prog, sgr_dbname ()); + fail_exit (1); + } + + /* + * Update group passwords if non-shadow password is "x". + */ + (void) gr_rewind (); + while ((gr = gr_next ()) != NULL) { + sg = sgr_locate (gr->gr_name); + if ( (NULL != sg) + && (strcmp (gr->gr_passwd, SHADOW_PASSWD_STRING) == 0)) { + /* add password to /etc/group */ + grent = *gr; + grent.gr_passwd = sg->sg_passwd; + if (gr_update (&grent) == 0) { + fprintf (stderr, + _("%s: failed to prepare the new %s entry '%s'\n"), + Prog, gr_dbname (), grent.gr_name); + fail_exit (3); + } + } + } + + (void) sgr_close (); /* was only open O_RDONLY */ + + if (gr_close () == 0) { + fprintf (stderr, + _("%s: failure while writing changes to %s\n"), + Prog, gr_dbname ()); + SYSLOG ((LOG_ERR, "failure while writing changes to %s", gr_dbname ())); + fail_exit (3); + } + + if (unlink (SGROUP_FILE) != 0) { + fprintf (stderr, + _("%s: cannot delete %s\n"), + Prog, SGROUP_FILE); + SYSLOG ((LOG_ERR, "cannot delete %s", SGROUP_FILE)); + fail_exit (3); + } + + if (gr_unlock () == 0) { + fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, gr_dbname ()); + SYSLOG ((LOG_ERR, "failed to unlock %s", gr_dbname ())); + /* continue */ + } + + if (sgr_unlock () == 0) { + fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, sgr_dbname ()); + SYSLOG ((LOG_ERR, "failed to unlock %s", sgr_dbname ())); + /* continue */ + } + + nscd_flush_cache ("group"); + sssd_flush_cache (SSSD_DB_GROUP); + + return 0; +} +#else /* !SHADOWGRP */ +int main (int unused(argc), char **argv) +{ + fprintf (stderr, + "%s: not configured for shadow group support.\n", argv[0]); + exit (1); +} +#endif /* !SHADOWGRP */ + |