ee43f47f45
passwd, shadow, group, gshadow etc. can be managed via nss - e.g. system default accounts can be specified using nss_altfiles, rather than in /etc/. Thus despite having default accounts, these files can be missing on disk and thus should be opened with O_CREATE whenever they are attempted to be opened in O_RDWR modes.
251 lines
6.5 KiB
C
251 lines
6.5 KiB
C
/*
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* Copyright (c) 1996 , Michael Meskes
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* Copyright (c) 1996 - 2000, Marek Michałkiewicz
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* Copyright (c) 2002 - 2006, Tomasz Kłoczko
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* Copyright (c) 2008 - 2011, Nicolas François
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the copyright holders or contributors may not be used to
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* endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* grpunconv - update /etc/group with information from /etc/gshadow.
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*
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*/
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#include <config.h>
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#ident "$Id$"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <fcntl.h>
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#include <time.h>
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#include <unistd.h>
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#include <grp.h>
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#include <getopt.h>
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#include "nscd.h"
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#include "prototypes.h"
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/*@-exitarg@*/
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#include "exitcodes.h"
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#ifdef SHADOWGRP
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#include "groupio.h"
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#include "sgroupio.h"
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/*
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* Global variables
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*/
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const char *Prog;
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static bool gr_locked = false;
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static bool sgr_locked = false;
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/* local function prototypes */
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static void fail_exit (int status);
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static void usage (int status);
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static void process_flags (int argc, char **argv);
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static void fail_exit (int status)
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{
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if (gr_locked) {
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if (gr_unlock () == 0) {
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fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, gr_dbname ());
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SYSLOG ((LOG_ERR, "failed to unlock %s", gr_dbname ()));
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/* continue */
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}
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}
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if (sgr_locked) {
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if (sgr_unlock () == 0) {
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fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, sgr_dbname ());
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SYSLOG ((LOG_ERR, "failed to unlock %s", sgr_dbname ()));
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/* continue */
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}
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}
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exit (status);
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}
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static void usage (int status)
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{
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FILE *usageout = (E_SUCCESS != status) ? stderr : stdout;
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(void) fprintf (usageout,
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_("Usage: %s [options]\n"
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"\n"
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"Options:\n"),
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Prog);
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(void) fputs (_(" -h, --help display this help message and exit\n"), usageout);
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(void) fputs (_(" -R, --root CHROOT_DIR directory to chroot into\n"), usageout);
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(void) fputs ("\n", usageout);
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exit (status);
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}
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/*
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* process_flags - parse the command line options
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*
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* It will not return if an error is encountered.
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*/
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static void process_flags (int argc, char **argv)
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{
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/*
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* Parse the command line options.
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*/
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int c;
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static struct option long_options[] = {
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{"help", no_argument, NULL, 'h'},
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{"root", required_argument, NULL, 'R'},
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{NULL, 0, NULL, '\0'}
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};
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while ((c = getopt_long (argc, argv, "hR:",
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long_options, NULL)) != -1) {
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switch (c) {
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case 'h':
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usage (E_SUCCESS);
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/*@notreached@*/break;
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case 'R': /* no-op, handled in process_root_flag () */
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break;
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default:
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usage (E_USAGE);
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}
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}
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if (optind != argc) {
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usage (E_USAGE);
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}
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}
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int main (int argc, char **argv)
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{
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const struct group *gr;
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struct group grent;
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const struct sgrp *sg;
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Prog = Basename (argv[0]);
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(void) setlocale (LC_ALL, "");
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(void) bindtextdomain (PACKAGE, LOCALEDIR);
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(void) textdomain (PACKAGE);
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process_root_flag ("-R", argc, argv);
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OPENLOG ("grpunconv");
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process_flags (argc, argv);
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if (sgr_file_present () == 0) {
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exit (0); /* no /etc/gshadow, nothing to do */
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}
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if (gr_lock () == 0) {
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fprintf (stderr,
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_("%s: cannot lock %s; try again later.\n"),
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Prog, gr_dbname ());
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fail_exit (5);
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}
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gr_locked = true;
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if (gr_open (O_CREAT | O_RDWR) == 0) {
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fprintf (stderr,
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_("%s: cannot open %s\n"), Prog, gr_dbname ());
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fail_exit (1);
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}
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if (sgr_lock () == 0) {
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fprintf (stderr,
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_("%s: cannot lock %s; try again later.\n"),
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Prog, sgr_dbname ());
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fail_exit (5);
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}
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sgr_locked = true;
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if (sgr_open (O_RDONLY) == 0) {
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fprintf (stderr,
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_("%s: cannot open %s\n"), Prog, sgr_dbname ());
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fail_exit (1);
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}
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/*
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* Update group passwords if non-shadow password is "x".
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*/
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(void) gr_rewind ();
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while ((gr = gr_next ()) != NULL) {
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sg = sgr_locate (gr->gr_name);
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if ( (NULL != sg)
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&& (strcmp (gr->gr_passwd, SHADOW_PASSWD_STRING) == 0)) {
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/* add password to /etc/group */
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grent = *gr;
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grent.gr_passwd = sg->sg_passwd;
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if (gr_update (&grent) == 0) {
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fprintf (stderr,
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_("%s: failed to prepare the new %s entry '%s'\n"),
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Prog, gr_dbname (), grent.gr_name);
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fail_exit (3);
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}
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}
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}
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(void) sgr_close (); /* was only open O_RDONLY */
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if (gr_close () == 0) {
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fprintf (stderr,
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_("%s: failure while writing changes to %s\n"),
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Prog, gr_dbname ());
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SYSLOG ((LOG_ERR, "failure while writing changes to %s", gr_dbname ()));
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fail_exit (3);
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}
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if (unlink (SGROUP_FILE) != 0) {
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fprintf (stderr,
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_("%s: cannot delete %s\n"),
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Prog, SGROUP_FILE);
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SYSLOG ((LOG_ERR, "cannot delete %s", SGROUP_FILE));
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fail_exit (3);
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}
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if (gr_unlock () == 0) {
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fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, gr_dbname ());
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SYSLOG ((LOG_ERR, "failed to unlock %s", gr_dbname ()));
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/* continue */
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}
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if (sgr_unlock () == 0) {
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fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, sgr_dbname ());
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SYSLOG ((LOG_ERR, "failed to unlock %s", sgr_dbname ()));
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/* continue */
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}
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nscd_flush_cache ("group");
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return 0;
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}
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#else /* !SHADOWGRP */
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int main (int unused(argc), char **argv)
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{
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fprintf (stderr,
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"%s: not configured for shadow group support.\n", argv[0]);
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exit (1);
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}
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#endif /* !SHADOWGRP */
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