mirror of https://gitee.com/openkylin/openssh.git
83 lines
2.3 KiB
C
83 lines
2.3 KiB
C
|
/* $OpenBSD: daemon.c,v 1.6 2005/08/08 08:05:33 espie Exp $ */
|
||
|
|
/*-
|
||
|
|
* 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.
|
||
|
|
* 3. 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.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* OPENBSD ORIGINAL: lib/libc/gen/daemon.c */
|
||
|
|
|
||
|
|
#include "includes.h"
|
||
|
|
|
||
|
|
#ifndef HAVE_DAEMON
|
||
|
|
|
||
|
|
#include <sys/types.h>
|
||
|
|
|
||
|
|
#ifdef HAVE_SYS_STAT_H
|
||
|
|
# include <sys/stat.h>
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef HAVE_FCNTL_H
|
||
|
|
# include <fcntl.h>
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef HAVE_UNISTD_H
|
||
|
|
# include <unistd.h>
|
||
|
|
#endif
|
||
|
|
|
||
|
|
int
|
||
|
|
daemon(int nochdir, int noclose)
|
||
|
|
{
|
||
|
|
int fd;
|
||
|
|
|
||
|
|
switch (fork()) {
|
||
|
|
case -1:
|
||
|
|
return (-1);
|
||
|
|
case 0:
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
_exit(0);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (setsid() == -1)
|
||
|
|
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);
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* !HAVE_DAEMON */
|
||
|
|
|