/*    $Header: /cvsroot/wikipedia/willow/src/bin/willow/daemon.c,v 1.1 2005/05/02 19:15:21 kateturner Exp $    */

/*    $NetBSD: daemon.c,v 1.9 2003/08/07 16:42:46 agc Exp $    */

/*-

 * Copyright (c) 1990, 1993

 *    The Regents of the University of California.  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 the University 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 THE REGENTS 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 REGENTS 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.

 */

#if defined __SUNPRO_C || defined __DECC || defined __HP_cc

# pragma ident "@(#)$Header: /cvsroot/wikipedia/willow/src/bin/willow/daemon.c,v 1.1 2005/05/02 19:15:21 kateturner Exp $"

# pragma ident "$NetBSD: daemon.c,v 1.9 2003/08/07 16:42:46 agc Exp $"

#endif

#include <fcntl.h>

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

#include "memcached.h"

int daemonize(int nochdir, int noclose)

{

    int fd;

    switch (fork()) {

    case -1:

        return (-1);

    case 0:

        break;

    default:

        _exit(EXIT_SUCCESS);

    }

    if (setsid() == -1)

        return (-1);

    if (nochdir == 0) {

        if(chdir("/") != 0) {

            perror("chdir");

            return (-1);

        }

    }

    if (noclose == 0 && (fd = open("/dev/null", O_RDWR, 0)) != -1) {

        if(dup2(fd, STDIN_FILENO) < 0) {

            perror("dup2 stdin");

            return (-1);

        }

        if(dup2(fd, STDOUT_FILENO) < 0) {

            perror("dup2 stdout");

            return (-1);

        }

        if(dup2(fd, STDERR_FILENO) < 0) {

            perror("dup2 stderr");

            return (-1);

        }

        if (fd > STDERR_FILENO) {

            if(close(fd) < 0) {

                perror("close");

                return (-1);

            }

        }

    }

    return (0);

}