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ben-wpan/tools/lib/daemon.c

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/*
* lib/daemon.c - Helper functions for proper daemonification
*
* Written 2011 by Werner Almesberger
* Copyright 2011 Werner Almesberger
*
* 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.
*/
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include "daemon.h"
pid_t daemonize(void)
{
pid_t pid;
int i;
pid = fork();
if (pid < 0) {
perror("fork");
exit(1);
}
if (pid)
return pid;
if (setsid() < 0) {
perror("setsid");
exit(1);
}
for (i = 0; i <= 2; i++)
(void) close(i);
(void) chdir("/");
return 0;
}