2b22a6909d
Closes #325 Add a new subid_init() function which can be used to specify the stream on which error messages should be printed. (If you want to get fancy you can redirect that to memory :) If subid_init() is not called, use stderr. If NULL is passed, then /dev/null will be used. This patch also fixes up the 'Prog', which previously had to be defined by any program linking against libsubid. Now, by default in libsubid it will show (subid). Once subid_init() is called, it will use the first variable passed to subid_init(). Signed-off-by: Serge Hallyn <serge@hallyn.com>
292 lines
7.8 KiB
C
292 lines
7.8 KiB
C
/*
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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) 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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* grpconv - create or update /etc/gshadow with information from
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* /etc/group.
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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 <errno.h>
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#include <fcntl.h>
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#include <grp.h>
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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 <time.h>
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#include <unistd.h>
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#include <getopt.h>
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#include "nscd.h"
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#include "sssd.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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FILE *shadow_logfd = NULL;
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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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struct sgrp sgent;
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Prog = Basename (argv[0]);
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shadow_logfd = stderr;
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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 ("grpconv");
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process_flags (argc, argv);
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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, _("%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_CREAT | O_RDWR) == 0) {
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fprintf (stderr, _("%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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* Remove /etc/gshadow entries for groups not in /etc/group.
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*/
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(void) sgr_rewind ();
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while ((sg = sgr_next ()) != NULL) {
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if (gr_locate (sg->sg_name) != NULL) {
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continue;
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}
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if (sgr_remove (sg->sg_name) == 0) {
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/*
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* This shouldn't happen (the entry exists) but...
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*/
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fprintf (stderr,
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_("%s: cannot remove entry '%s' from %s\n"),
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Prog, sg->sg_name, sgr_dbname ());
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fail_exit (3);
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}
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(void) sgr_rewind ();
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}
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/*
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* Update shadow group passwords if non-shadow password is not "x".
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* Add any missing shadow group entries.
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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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/* update existing shadow group entry */
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sgent = *sg;
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if (strcmp (gr->gr_passwd, SHADOW_PASSWD_STRING) != 0)
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sgent.sg_passwd = gr->gr_passwd;
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} else {
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static char *empty = 0;
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/* add new shadow group entry */
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memset (&sgent, 0, sizeof sgent);
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sgent.sg_name = gr->gr_name;
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sgent.sg_passwd = gr->gr_passwd;
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sgent.sg_adm = ∅
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}
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/*
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* XXX - sg_mem is redundant, it is currently always a copy
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* of gr_mem. Very few programs actually use sg_mem, and all
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* of them are in the shadow suite. Maybe this field could
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* be used for something else? Any suggestions?
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*/
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sgent.sg_mem = gr->gr_mem;
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if (sgr_update (&sgent) == 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, sgr_dbname (), sgent.sg_name);
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fail_exit (3);
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}
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/* remove password from /etc/group */
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grent = *gr;
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grent.gr_passwd = SHADOW_PASSWD_STRING; /* XXX warning: const */
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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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if (sgr_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, sgr_dbname ());
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SYSLOG ((LOG_ERR, "failure while writing changes to %s", sgr_dbname ()));
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fail_exit (3);
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}
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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 (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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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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nscd_flush_cache ("group");
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sssd_flush_cache (SSSD_DB_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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