daemon.c revision 178825
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. 13178825Sdfr * 3. Neither the name of the University nor the names of its contributors 1455682Smarkm * may be used to endorse or promote products derived from this software 1555682Smarkm * without specific prior written permission. 1655682Smarkm * 1755682Smarkm * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 1855682Smarkm * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1955682Smarkm * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2055682Smarkm * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2155682Smarkm * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2255682Smarkm * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2355682Smarkm * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2455682Smarkm * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2555682Smarkm * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2655682Smarkm * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2755682Smarkm * SUCH DAMAGE. 2855682Smarkm */ 2955682Smarkm 3055682Smarkm#if defined(LIBC_SCCS) && !defined(lint) 3155682Smarkmstatic char sccsid[] = "@(#)daemon.c 8.1 (Berkeley) 6/4/93"; 3255682Smarkm#endif /* LIBC_SCCS and not lint */ 3355682Smarkm 3455682Smarkm#ifdef HAVE_CONFIG_H 3555682Smarkm#include <config.h> 3655682Smarkm#endif 3755682Smarkm 38178825SdfrRCSID("$Id: daemon.c 14773 2005-04-12 11:29:18Z lha $"); 3955682Smarkm 4055682Smarkm#ifndef HAVE_DAEMON 4155682Smarkm 4255682Smarkm#ifdef HAVE_FCNTL_H 4355682Smarkm#include <fcntl.h> 4455682Smarkm#endif 4555682Smarkm#ifdef HAVE_PATHS_H 4655682Smarkm#include <paths.h> 4755682Smarkm#endif 4855682Smarkm#ifdef HAVE_UNISTD_H 4955682Smarkm#include <unistd.h> 5055682Smarkm#endif 5155682Smarkm 5255682Smarkm#include "roken.h" 5355682Smarkm 54178825Sdfrint ROKEN_LIB_FUNCTION 5555682Smarkmdaemon(int nochdir, int noclose) 5655682Smarkm{ 5755682Smarkm int fd; 5855682Smarkm 5955682Smarkm switch (fork()) { 6055682Smarkm case -1: 6155682Smarkm return (-1); 6255682Smarkm case 0: 6355682Smarkm break; 6455682Smarkm default: 6555682Smarkm _exit(0); 6655682Smarkm } 6755682Smarkm 6855682Smarkm if (setsid() == -1) 6955682Smarkm return (-1); 7055682Smarkm 7155682Smarkm if (!nochdir) 7255682Smarkm chdir("/"); 7355682Smarkm 7455682Smarkm if (!noclose && (fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) { 7555682Smarkm dup2(fd, STDIN_FILENO); 7655682Smarkm dup2(fd, STDOUT_FILENO); 7755682Smarkm dup2(fd, STDERR_FILENO); 7855682Smarkm if (fd > 2) 7955682Smarkm close (fd); 8055682Smarkm } 8155682Smarkm return (0); 8255682Smarkm} 8355682Smarkm 8455682Smarkm#endif /* HAVE_DAEMON */ 85