git.m6w6.name Git - awesomized/libmemcached/blob - memcached/daemon.c

   1 /*    $Header: /cvsroot/wikipedia/willow/src/bin/willow/daemon.c,v 1.1 2005/05/02 19:15:21 kateturner Exp $    */
   2 /*    $NetBSD: daemon.c,v 1.9 2003/08/07 16:42:46 agc Exp $    */
   3 /*-
   4  * Copyright (c) 1990, 1993
   5  *    The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <config.h>
  33
  34 #if defined __SUNPRO_C || defined __DECC || defined __HP_cc
  35 # pragma ident "@(#)$Header: /cvsroot/wikipedia/willow/src/bin/willow/daemon.c,v 1.1 2005/05/02 19:15:21 kateturner Exp $"
  36 # pragma ident "$NetBSD: daemon.c,v 1.9 2003/08/07 16:42:46 agc Exp $"
  37 #endif
  38
  39 #include <fcntl.h>
  40 #include <stdio.h>
  41 #include <stdlib.h>
  42 #include <unistd.h>
  43
  44 #include "memcached.h"
  45
  46 int daemonize(int nochdir, int noclose)
  47 {
  48     int fd;
  49
  50     switch (fork()) {
  51     case -1:
  52         return (-1);
  53     case 0:
  54         break;
  55     default:
  56         _exit(EXIT_SUCCESS);
  57     }
  58
  59     if (setsid() == -1)
  60         return (-1);
  61
  62     if (nochdir == 0) {
  63         if(chdir("/") != 0) {
  64             perror("chdir");
  65             return (-1);
  66         }
  67     }
  68
  69     if (noclose == 0 && (fd = open("/dev/null", O_RDWR, 0)) != -1) {
  70         if(dup2(fd, STDIN_FILENO) < 0) {
  71             perror("dup2 stdin");
  72             return (-1);
  73         }
  74         if(dup2(fd, STDOUT_FILENO) < 0) {
  75             perror("dup2 stdout");
  76             return (-1);
  77         }
  78         if(dup2(fd, STDERR_FILENO) < 0) {
  79             perror("dup2 stderr");
  80             return (-1);
  81         }
  82
  83         if (fd > STDERR_FILENO) {
  84             if(close(fd) < 0) {
  85                 perror("close");
  86                 return (-1);
  87             }
  88         }
  89     }
  90     return (0);
  91 }