daemonize.c
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/**
* \file
* Disconnect from parent process and let all standard file handles
* point to /dev/null.
*
* \author Georg Hopp
*
* \copyright
* Copyright © 2012 Georg Hopp
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h> // for printf() and fprintf()
#include <unistd.h> // for getopt
#include <stdlib.h>
void daemonize(void) {
pid_t pid;
if (0 > ((pid = fork()))) {
perror("deamoinze[fork]");
exit(EXIT_FAILURE);
} else if (0 != pid) {
exit(EXIT_SUCCESS);
}
// make new child session leader
setsid();
// connect all standard streams to /dev/null
stderr = freopen("/dev/null", "w", stderr);
stdin = freopen("/dev/null", "r", stdin);
stdout = freopen("/dev/null", "w", stdout);
}