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/* $Id$ */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <signal.h>
#include "osdep.h"
#include "cmsys.h"
int
daemonize(const char * pidfile, const char * logfile)
{
int fd;
char buf[32];
pid_t pid;
umask(022);
if ((pid = fork()) < 0) {
perror("Fork failed");
exit(1);
}
if (pid > 0)
exit(0);
if (setsid() < 0) {
perror("Setsid failed");
exit(-1);
}
if ((pid = fork()) < 0) {
perror("Fork failed");
exit(1);
}
if (pid > 0)
exit(0);
if (chdir("/") < 0) {
perror("Can't chdir to root");
exit(-1);
}
if (pidfile) {
if ((fd = creat(pidfile, 0644)) >= 0) {
snprintf(buf, sizeof(buf), "%d", (int)getpid());
write(fd, buf, strlen(buf));
close(fd);
} else
perror("Can't open PID file");
}
if (logfile) {
if ((fd = open(logfile, O_WRONLY | O_CREAT | O_APPEND, 0644)) < 0) {
perror("Can't open logfile");
exit(1);
}
if (fd != 2) {
dup2(fd, 2);
close(fd);
}
}
fd = getdtablesize();
while (fd > 2)
close(--fd);
if ((fd = open("/dev/null", O_RDWR)) < 0) {
perror("Can't open /dev/null");
exit(1);
}
dup2(fd, 0);
dup2(fd, 1);
if (!logfile)
dup2(fd, 2);
if (fd > 2)
close(fd);
Signal(SIGHUP, SIG_IGN);
Signal(SIGCHLD, SIG_IGN);
return 0;
}
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