88 lines
1.9 KiB
C
88 lines
1.9 KiB
C
/*
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daemon.c -- replacement daemon() for platforms that do not have it
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Copyright (C) 2000 Ivo Timmermans <itimmermans@bigfoot.com>,
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2000 Guus Sliepen <guus@sliepen.warande.net>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id: daemon.c,v 1.1.2.1 2000/11/24 23:30:50 guus Exp $
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*/
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#include "config.h"
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <system.h>
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#ifndef HAVE_DAEMON
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int daemon(int nochdir, int noclose)
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{
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pid_t pid;
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int fd;
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pid = fork();
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/* Check if forking failed */
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if(pid < 0)
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{
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perror("fork");
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exit(-1);
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}
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/* If we are the parent, terminate */
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if(pid)
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exit(0);
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/* Detach by becoming the new process group leader */
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if(setsid() < 0)
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{
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perror("setsid");
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return -1;
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}
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/* Change working directory to the root (to avoid keeping mount points busy) */
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if(!nochdir)
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{
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chdir("/");
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}
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/* Redirect stdin/out/err to /dev/null */
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if(!noclose)
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{
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fd = open("/dev/null", O_RDWR);
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if(fd < 0)
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{
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perror("opening /dev/null");
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return -1;
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}
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else
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{
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dup2(fd, 0);
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dup2(fd, 1);
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dup2(fd, 2);
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}
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}
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}
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#endif
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