1/* $NetBSD$ */ 2 3#if defined(LIBC_SCCS) && !defined(lint) 4static const char sccsid[] = "@(#)daemon.c 8.1 (Berkeley) 6/4/93"; 5static const char rcsid[] = "Id: daemon.c,v 1.2 2005/04/27 04:56:10 sra Exp "; 6#endif /* LIBC_SCCS and not lint */ 7 8/* 9 * Copyright (c) 1990, 1993 10 * The Regents of the University of California. All rights reserved. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 */ 40 41#include "port_before.h" 42 43#include <fcntl.h> 44#include <paths.h> 45#include <unistd.h> 46 47#include "port_after.h" 48 49#ifndef NEED_DAEMON 50int __bind_daemon__; 51#else 52 53int 54daemon(int nochdir, int noclose) { 55 int fd; 56 57 switch (fork()) { 58 case -1: 59 return (-1); 60 case 0: 61 break; 62 default: 63 _exit(0); 64 } 65 66 if (setsid() == -1) 67 return (-1); 68 69 if (!nochdir) 70 (void)chdir("/"); 71 72 if (!noclose && (fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) { 73 (void)dup2(fd, STDIN_FILENO); 74 (void)dup2(fd, STDOUT_FILENO); 75 (void)dup2(fd, STDERR_FILENO); 76 if (fd > 2) 77 (void)close (fd); 78 } 79 return (0); 80} 81#endif 82 83/*! \file */ 84