shadow/src/pwunconv.c

/*
 * Copyright 1989 - 1994, Julianne Frances Haugh
 * 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. Neither the name of Julianne F. Haugh nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY JULIE HAUGH 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 JULIE HAUGH 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.
 */

#include <config.h>

#ident "$Id: pwunconv.c,v 1.21 2005/09/07 15:00:45 kloczek Exp $"

#include <fcntl.h>
#include <pwd.h>
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#include "defines.h"
#include "nscd.h"
#include "prototypes.h"
#include "pwio.h"
#include "shadowio.h"
/*
 * Global variables
 */
static int shadow_locked = 0, passwd_locked = 0;

char *l64a ();

/* local function prototypes */
static void fail_exit (int);

static void fail_exit (int status)
{
	if (shadow_locked)
		spw_unlock ();
	if (passwd_locked)
		pw_unlock ();
	exit (status);
}


int main (int argc, char **argv)
{
	const struct passwd *pw;
	struct passwd pwent;
	const struct spwd *spwd;

	char *Prog = argv[0];

	setlocale (LC_ALL, "");
	bindtextdomain (PACKAGE, LOCALEDIR);
	textdomain (PACKAGE);

	if (!spw_file_present ())
		/* shadow not installed, do nothing */
		exit (0);

	if (!pw_lock ()) {
		fprintf (stderr, _("%s: can't lock passwd file\n"), Prog);
		fail_exit (5);
	}
	passwd_locked++;
	if (!pw_open (O_RDWR)) {
		fprintf (stderr, _("%s: can't open passwd file\n"), Prog);
		fail_exit (1);
	}

	if (!spw_lock ()) {
		fprintf (stderr, _("%s: can't open shadow file\n"), Prog);
		fail_exit (5);
	}
	shadow_locked++;
	if (!spw_open (O_RDWR)) {
		fprintf (stderr, _("%s: can't open shadow file\n"), Prog);
		fail_exit (1);
	}

	pw_rewind ();
	while ((pw = pw_next ())) {
		if (!(spwd = spw_locate (pw->pw_name)))
			continue;

		pwent = *pw;

		/*
		 * Update password if non-shadow is "x".
		 */
		if (strcmp (pw->pw_passwd, SHADOW_PASSWD_STRING) == 0)
			pwent.pw_passwd = spwd->sp_pwdp;

		/*
		 * Password aging works differently in the two different
		 * systems. With shadow password files you apparently must
		 * have some aging information. The maxweeks or minweeks
		 * may not map exactly. In pwconv we set max == 10000,
		 * which is about 30 years. Here we have to undo that
		 * kludge. So, if maxdays == 10000, no aging information is
		 * put into the new file. Otherwise, the days are converted
		 * to weeks and so on.
		 */
		if (!pw_update (&pwent)) {
			fprintf (stderr,
				 _("%s: can't update entry for user %s\n"),
				 Prog, pwent.pw_name);
			fail_exit (3);
		}
	}

	if (!spw_close ()) {
		fprintf (stderr,
			 _("%s: can't update shadow password file\n"), Prog);
		fail_exit (3);
	}

	if (!pw_close ()) {
		fprintf (stderr, _("%s: can't update password file\n"), Prog);
		fail_exit (3);
	}

	if (unlink (SHADOW) != 0) {
		fprintf (stderr,
			 _("%s: can't delete shadow password file\n"), Prog);
		fail_exit (3);
	}

	spw_unlock ();
	pw_unlock ();

	nscd_flush_cache ("passwd");

	return 0;
}