shadow/lib/lockpw.c

/*
 * Copyright (c) 1992       , Julianne Frances Haugh
 * Copyright (c) 1996 - 1998, Marek Michałkiewicz
 * Copyright (c) 2005       , Tomasz Kłoczko
 * 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. The name of the copyright holders or contributors may not be used to
 *    endorse or promote products derived from this software without
 *    specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 THE COPYRIGHT
 * HOLDERS 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>

#ifndef HAVE_LCKPWDF

#ident "$Id$"

#include "prototypes.h"
#include "defines.h"
#include "pwio.h"
#include "shadowio.h"
/*
 * lckpwdf - lock the password files
 */
int lckpwdf (void)
{
	int i;

	/*
	 * We have 15 seconds to lock the whole mess
	 */

	for (i = 0; i < 15; i++)
		if (pw_lock ())
			break;
		else
			sleep (1);

	/*
	 * Did we run out of time?
	 */

	if (i == 15)
		return -1;

	/*
	 * Nope, use any remaining time to lock the shadow password
	 * file.
	 */

	for (; i < 15; i++)
		if (spw_lock ())
			break;
		else
			sleep (1);

	/*
	 * Out of time yet?
	 */

	if (i == 15) {
		pw_unlock ();
		return -1;
	}

	/*
	 * Nope - and both files are now locked.
	 */

	return 0;
}

/*
 * ulckpwdf - unlock the password files
 */

int ulckpwdf (void)
{

	/*
	 * Unlock both files.
	 */

	return (pw_unlock () && spw_unlock ())? 0 : -1;
}
#else
extern int errno;		/* warning: ANSI C forbids an empty source file */
#endif