shadow/src/grpunconv.c

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/*
* grpunconv - update /etc/group with information from /etc/gshadow.
*
* Copyright (C) 1996, Michael Meskes <meskes@debian.org>
* using sources from Marek Michalkiewicz
* <marekm@i17linuxb.ists.pwr.wroc.pl>
* This program may be freely used and distributed. If you improve
* it, please send me your changes. Thanks!
*/
#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 "nscd.h"
#include "prototypes.h"
#ifdef SHADOWGRP
#include "groupio.h"
#include "sgroupio.h"
/*
* Global variables
*/
static int group_locked = 0;
static int gshadow_locked = 0;
/* local function prototypes */
static void fail_exit (int);
static void fail_exit (int status)
{
if (group_locked)
gr_unlock ();
if (gshadow_locked)
sgr_unlock ();
exit (status);
}
int main (int argc, char **argv)
{
const struct group *gr;
struct group grent;
const struct sgrp *sg;
char *Prog = argv[0];
setlocale (LC_ALL, "");
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
if (!sgr_file_present ())
exit (0); /* no /etc/gshadow, nothing to do */
if (!gr_lock ()) {
fprintf (stderr, _("%s: can't lock group file\n"), Prog);
fail_exit (5);
}
group_locked++;
if (!gr_open (O_RDWR)) {
fprintf (stderr, _("%s: can't open group file\n"), Prog);
fail_exit (1);
}
if (!sgr_lock ()) {
fprintf (stderr, _("%s: can't lock shadow group file\n"), Prog);
fail_exit (5);
}
gshadow_locked++;
if (!sgr_open (O_RDWR)) {
fprintf (stderr, _("%s: can't open shadow group file\n"), Prog);
fail_exit (1);
}
/*
* Update group passwords if non-shadow password is "x".
*/
gr_rewind ();
while ((gr = gr_next ())) {
sg = sgr_locate (gr->gr_name);
if (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)) {
fprintf (stderr,
_
("%s: can't update entry for group %s\n"),
Prog, grent.gr_name);
fail_exit (3);
}
}
}
if (!sgr_close ()) {
fprintf (stderr, _("%s: can't update shadow group file\n"),
Prog);
fail_exit (3);
}
if (!gr_close ()) {
fprintf (stderr, _("%s: can't update group file\n"), Prog);
fail_exit (3);
}
if (unlink (SGROUP_FILE) != 0) {
fprintf (stderr, _("%s: can't delete shadow group file\n"),
Prog);
fail_exit (3);
}
sgr_unlock ();
gr_unlock ();
nscd_flush_cache ("group");
return 0;
}
#else /* !SHADOWGRP */
int main (int argc, char **argv)
{
fprintf (stderr,
"%s: not configured for shadow group support.\n", argv[0]);
exit (1);
}
#endif /* !SHADOWGRP */