NetBSD/lib/libc/gen/daemon.c

68 lines
2.5 KiB
C
Raw Normal View History

1993-03-21 12:45:37 +03:00
/*-
* Copyright (c) 1990 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 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.
*/
#if defined(LIBC_SCCS) && !defined(lint)
1993-08-01 21:54:45 +04:00
/*static char sccsid[] = "from: @(#)daemon.c 5.3 (Berkeley) 12/28/90";*/
static char rcsid[] = "$Id: daemon.c,v 1.3 1993/12/19 08:44:42 pk Exp $";
1993-03-21 12:45:37 +03:00
#endif /* LIBC_SCCS and not lint */
#include <sys/fcntl.h>
#include <unistd.h>
#include <paths.h>
daemon(nochdir, noclose)
int nochdir, noclose;
{
int cpid;
if ((cpid = fork()) == -1)
return (-1);
if (cpid)
exit(0);
(void) setsid();
if (!nochdir)
(void) chdir("/");
if (!noclose) {
int devnull = open(_PATH_DEVNULL, O_RDWR, 0);
if (devnull != -1) {
(void) dup2(devnull, STDIN_FILENO);
(void) dup2(devnull, STDOUT_FILENO);
(void) dup2(devnull, STDERR_FILENO);
if (devnull > 2)
(void) close(devnull);
}
}
return (0);
1993-03-21 12:45:37 +03:00
}