#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)daemon.c 8.1 (Berkeley) 6/4/93";
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/lib/libc/gen/daemon.c,v 1.8 2007/01/09 00:27:53 imp Exp $");
#ifndef VARIANT_PRE1050
#include <mach/mach.h>
#include <servers/bootstrap.h>
#endif
#include "namespace.h"
#include <errno.h>
#include <fcntl.h>
#include <paths.h>
#include <stdlib.h>
#include <signal.h>
#include <unistd.h>
#include "un-namespace.h"
#ifndef VARIANT_PRE1050
static void
move_to_root_bootstrap(void)
{
mach_port_t parent_port = 0;
mach_port_t previous_port = 0;
do {
if (previous_port) {
mach_port_deallocate(mach_task_self(), previous_port);
previous_port = parent_port;
} else {
previous_port = bootstrap_port;
}
if (bootstrap_parent(previous_port, &parent_port) != 0) {
return;
}
} while (parent_port != previous_port);
task_set_bootstrap_port(mach_task_self(), parent_port);
bootstrap_port = parent_port;
}
#endif
int daemon(int, int) __DARWIN_1050(daemon);
int
daemon(nochdir, noclose)
int nochdir, noclose;
{
struct sigaction osa, sa;
int fd;
pid_t newgrp;
int oerrno;
int osa_ok;
sigemptyset(&sa.sa_mask);
sa.sa_handler = SIG_IGN;
sa.sa_flags = 0;
osa_ok = _sigaction(SIGHUP, &sa, &osa);
#ifndef VARIANT_PRE1050
move_to_root_bootstrap();
#endif
switch (fork()) {
case -1:
return (-1);
case 0:
break;
default:
_exit(0);
}
newgrp = setsid();
oerrno = errno;
if (osa_ok != -1)
_sigaction(SIGHUP, &osa, NULL);
if (newgrp == -1) {
errno = oerrno;
return (-1);
}
if (!nochdir)
(void)chdir("/");
if (!noclose && (fd = _open(_PATH_DEVNULL, O_RDWR, 0)) != -1) {
(void)_dup2(fd, STDIN_FILENO);
(void)_dup2(fd, STDOUT_FILENO);
(void)_dup2(fd, STDERR_FILENO);
if (fd > 2)
(void)_close(fd);
}
return (0);
}