/* | |
* daemon.c - "daemonize" a process | |
*/ | |
#include <stdlib.h> | |
#include <unistd.h> | |
#include <fcntl.h> | |
int daemon(int nochdir, int noclose) | |
{ | |
int nullfd; | |
pid_t f; | |
if ( !nochdir ) { | |
if ( chdir("/") ) | |
return -1; | |
} | |
if ( !noclose ) { | |
if ( (nullfd = open("/dev/null", O_RDWR)) < 0 || | |
dup2(nullfd, 0) < 0 || | |
dup2(nullfd, 1) < 0 || | |
dup2(nullfd, 2) < 0 ) | |
return -1; | |
close(nullfd); | |
} | |
f = fork(); | |
if ( f < 0 ) | |
return -1; | |
else if ( f > 0 ) | |
_exit(0); | |
return setsid(); | |
} | |