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Diffstat (limited to 'src/grpconv.c')
-rw-r--r-- | src/grpconv.c | 286 |
1 files changed, 286 insertions, 0 deletions
diff --git a/src/grpconv.c b/src/grpconv.c new file mode 100644 index 0000000..f681f07 --- /dev/null +++ b/src/grpconv.c @@ -0,0 +1,286 @@ +/* + * Copyright (c) 1996 - 2000, Marek Michałkiewicz + * Copyright (c) 2002 - 2006, Tomasz Kłoczko + * Copyright (c) 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. + */ + +/* + * grpconv - create or update /etc/gshadow with information from + * /etc/group. + * + */ + +#include <config.h> +#ident "$Id$" + +#include <errno.h> +#include <fcntl.h> +#include <grp.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <time.h> +#include <unistd.h> +#include <getopt.h> +#include "nscd.h" +#include "prototypes.h" +/*@-exitarg@*/ +#include "exitcodes.h" +#ifdef SHADOWGRP +#include "groupio.h" +#include "sgroupio.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; + struct sgrp sgent; + + Prog = Basename (argv[0]); + + (void) setlocale (LC_ALL, ""); + (void) bindtextdomain (PACKAGE, LOCALEDIR); + (void) textdomain (PACKAGE); + + process_root_flag ("-R", argc, argv); + + OPENLOG ("grpconv"); + + process_flags (argc, argv); + + 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_CREAT | O_RDWR) == 0) { + fprintf (stderr, _("%s: cannot open %s\n"), Prog, sgr_dbname ()); + fail_exit (1); + } + + /* + * Remove /etc/gshadow entries for groups not in /etc/group. + */ + (void) sgr_rewind (); + while ((sg = sgr_next ()) != NULL) { + if (gr_locate (sg->sg_name) != NULL) { + continue; + } + + if (sgr_remove (sg->sg_name) == 0) { + /* + * This shouldn't happen (the entry exists) but... + */ + fprintf (stderr, + _("%s: cannot remove entry '%s' from %s\n"), + Prog, sg->sg_name, sgr_dbname ()); + fail_exit (3); + } + } + + /* + * Update shadow group passwords if non-shadow password is not "x". + * Add any missing shadow group entries. + */ + (void) gr_rewind (); + while ((gr = gr_next ()) != NULL) { + sg = sgr_locate (gr->gr_name); + if (NULL != sg) { + /* update existing shadow group entry */ + sgent = *sg; + if (strcmp (gr->gr_passwd, SHADOW_PASSWD_STRING) != 0) + sgent.sg_passwd = gr->gr_passwd; + } else { + static char *empty = 0; + + /* add new shadow group entry */ + memset (&sgent, 0, sizeof sgent); + sgent.sg_name = gr->gr_name; + sgent.sg_passwd = gr->gr_passwd; + sgent.sg_adm = ∅ + } + /* + * XXX - sg_mem is redundant, it is currently always a copy + * of gr_mem. Very few programs actually use sg_mem, and all + * of them are in the shadow suite. Maybe this field could + * be used for something else? Any suggestions? + */ + sgent.sg_mem = gr->gr_mem; + + if (sgr_update (&sgent) == 0) { + fprintf (stderr, + _("%s: failed to prepare the new %s entry '%s'\n"), + Prog, sgr_dbname (), sgent.sg_name); + fail_exit (3); + } + /* remove password from /etc/group */ + grent = *gr; + grent.gr_passwd = SHADOW_PASSWD_STRING; /* XXX warning: const */ + 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); + } + } + + if (sgr_close () == 0) { + fprintf (stderr, + _("%s: failure while writing changes to %s\n"), + Prog, sgr_dbname ()); + SYSLOG ((LOG_ERR, "failure while writing changes to %s", sgr_dbname ())); + fail_exit (3); + } + 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 (sgr_unlock () == 0) { + fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, sgr_dbname ()); + SYSLOG ((LOG_ERR, "failed to unlock %s", sgr_dbname ())); + /* continue */ + } + 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 */ + } + + nscd_flush_cache ("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 */ + |