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/*
* 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 "attr.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
*/
static const char Prog[] = "grpunconv";
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;
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 (Prog);
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 (MAYBE_UNUSED int argc, char **argv)
{
fprintf (stderr,
"%s: not configured for shadow group support.\n", argv[0]);
exit (1);
}
#endif /* !SHADOWGRP */
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