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- Added daemon() replacement.

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This commit is contained in:
Guus Sliepen 2000-11-24 23:30:50 +00:00
parent cfb828784e
commit 0806605ce3
2 changed files with 118 additions and 0 deletions
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lib/daemon.c Normal file
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/*
daemon.c -- replacement daemon() for platforms that do not have it
Copyright (C) 2000 Ivo Timmermans <itimmermans@bigfoot.com>,
2000 Guus Sliepen <guus@sliepen.warande.net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
$Id: daemon.c,v 1.1.2.1 2000/11/24 23:30:50 guus Exp $
*/
#include "config.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <system.h>
#ifndef HAVE_DAEMON
int daemon(int nochdir, int noclose)
{
pid_t pid;
int fd;
pid = fork();
/* Check if forking failed */
if(pid < 0)
{
perror("fork");
exit(-1);
}
/* If we are the parent, terminate */
if(pid)
exit(0);
/* Detach by becoming the new process group leader */
if(setsid() < 0)
{
perror("setsid");
return -1;
}
/* Change working directory to the root (to avoid keeping mount points busy) */
if(!nochdir)
{
chdir("/");
}
/* Redirect stdin/out/err to /dev/null */
if(!noclose)
{
fd = open("/dev/null", O_RDWR);
if(fd < 0)
{
perror("opening /dev/null");
return -1;
}
else
{
dup2(fd, 0);
dup2(fd, 1);
dup2(fd, 2);
}
}
}
#endif

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/*
daemon.h -- header file for daemon.c
Copyright (C) 2000 Ivo Timmermans <itimmermans@bigfoot.com>,
2000 Guus Sliepen <guus@sliepen.warande.net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
$Id: daemon.h,v 1.1.2.1 2000/11/24 23:30:50 guus Exp $
*/
#ifndef __DAEMON_H__
#define __DAEMON_H__
#ifndef HAVE_DAEMON
extern int daemon(int, int);
#endif
#endif /* __DAEMON_H__ */