mirror of
https://github.com/openstreetmap/mod_tile.git
synced 2025-08-01 07:43:30 +00:00
97 lines
2.7 KiB
C
97 lines
2.7 KiB
C
/*-
|
|
* Copyright (c) 1990, 1993
|
|
*The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include "config.h"
|
|
#ifndef HAVE_DAEMON
|
|
|
|
#ifdef HAVE_SYS_CDEFS_C
|
|
#include <sys/cdefs.h>
|
|
#endif
|
|
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <stdlib.h>
|
|
#include <signal.h>
|
|
#include <unistd.h>
|
|
#ifdef HAVE_PATHS_H
|
|
#include <paths.h>
|
|
#endif
|
|
#ifndef _PATH_DEVNULL
|
|
#define _PATH_DEVNULL "/dev/null"
|
|
#endif
|
|
|
|
int
|
|
daemon(nochdir, noclose)
|
|
int nochdir, noclose;
|
|
{
|
|
struct sigaction osa, sa;
|
|
int fd;
|
|
pid_t newgrp;
|
|
int oerrno;
|
|
int osa_ok;
|
|
|
|
/* A SIGHUP may be thrown when the parent exits below. */
|
|
sigemptyset(&sa.sa_mask);
|
|
sa.sa_handler = SIG_IGN;
|
|
sa.sa_flags = 0;
|
|
osa_ok = sigaction(SIGHUP, &sa, &osa);
|
|
|
|
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) {
|
|
dup2(fd, STDIN_FILENO);
|
|
dup2(fd, STDOUT_FILENO);
|
|
dup2(fd, STDERR_FILENO);
|
|
if (fd > 2)
|
|
close(fd);
|
|
}
|
|
return (0);
|
|
}
|
|
#endif
|