daemon.c revision 55682
155682Smarkm/*- 255682Smarkm * Copyright (c) 1990, 1993 355682Smarkm * The Regents of the University of California. All rights reserved. 455682Smarkm * 555682Smarkm * Redistribution and use in source and binary forms, with or without 655682Smarkm * modification, are permitted provided that the following conditions 755682Smarkm * are met: 855682Smarkm * 1. Redistributions of source code must retain the above copyright 955682Smarkm * notice, this list of conditions and the following disclaimer. 1055682Smarkm * 2. Redistributions in binary form must reproduce the above copyright 1155682Smarkm * notice, this list of conditions and the following disclaimer in the 1255682Smarkm * documentation and/or other materials provided with the distribution. 1355682Smarkm * 3. All advertising materials mentioning features or use of this software 1455682Smarkm * must display the following acknowledgement: 1555682Smarkm * This product includes software developed by the University of 1655682Smarkm * California, Berkeley and its contributors. 1755682Smarkm * 4. Neither the name of the University nor the names of its contributors 1855682Smarkm * may be used to endorse or promote products derived from this software 1955682Smarkm * without specific prior written permission. 2055682Smarkm * 2155682Smarkm * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2255682Smarkm * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2355682Smarkm * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2455682Smarkm * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2555682Smarkm * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2655682Smarkm * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2755682Smarkm * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2855682Smarkm * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2955682Smarkm * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3055682Smarkm * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3155682Smarkm * SUCH DAMAGE. 3255682Smarkm */ 3355682Smarkm 3455682Smarkm#if defined(LIBC_SCCS) && !defined(lint) 3555682Smarkmstatic char sccsid[] = "@(#)daemon.c 8.1 (Berkeley) 6/4/93"; 3655682Smarkm#endif /* LIBC_SCCS and not lint */ 3755682Smarkm 3855682Smarkm#ifdef HAVE_CONFIG_H 3955682Smarkm#include <config.h> 4055682Smarkm#endif 4155682Smarkm 4255682SmarkmRCSID("$Id: daemon.c,v 1.3 1997/10/04 21:55:48 joda Exp $"); 4355682Smarkm 4455682Smarkm#ifndef HAVE_DAEMON 4555682Smarkm 4655682Smarkm#ifdef HAVE_FCNTL_H 4755682Smarkm#include <fcntl.h> 4855682Smarkm#endif 4955682Smarkm#ifdef HAVE_PATHS_H 5055682Smarkm#include <paths.h> 5155682Smarkm#endif 5255682Smarkm#ifdef HAVE_UNISTD_H 5355682Smarkm#include <unistd.h> 5455682Smarkm#endif 5555682Smarkm 5655682Smarkm#include "roken.h" 5755682Smarkm 5855682Smarkmint 5955682Smarkmdaemon(int nochdir, int noclose) 6055682Smarkm{ 6155682Smarkm int fd; 6255682Smarkm 6355682Smarkm switch (fork()) { 6455682Smarkm case -1: 6555682Smarkm return (-1); 6655682Smarkm case 0: 6755682Smarkm break; 6855682Smarkm default: 6955682Smarkm _exit(0); 7055682Smarkm } 7155682Smarkm 7255682Smarkm if (setsid() == -1) 7355682Smarkm return (-1); 7455682Smarkm 7555682Smarkm if (!nochdir) 7655682Smarkm chdir("/"); 7755682Smarkm 7855682Smarkm if (!noclose && (fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) { 7955682Smarkm dup2(fd, STDIN_FILENO); 8055682Smarkm dup2(fd, STDOUT_FILENO); 8155682Smarkm dup2(fd, STDERR_FILENO); 8255682Smarkm if (fd > 2) 8355682Smarkm close (fd); 8455682Smarkm } 8555682Smarkm return (0); 8655682Smarkm} 8755682Smarkm 8855682Smarkm#endif /* HAVE_DAEMON */ 89