daemon.c revision 98937
1217309Snwhitehorn/*- 2251843Sbapt * Copyright (c) 1990, 1993 3217309Snwhitehorn * The Regents of the University of California. All rights reserved. 4224014Snwhitehorn * 5217309Snwhitehorn * Redistribution and use in source and binary forms, with or without 6251843Sbapt * modification, are permitted provided that the following conditions 7217309Snwhitehorn * are met: 8217309Snwhitehorn * 1. Redistributions of source code must retain the above copyright 9217309Snwhitehorn * notice, this list of conditions and the following disclaimer. 10217309Snwhitehorn * 2. Redistributions in binary form must reproduce the above copyright 11217309Snwhitehorn * notice, this list of conditions and the following disclaimer in the 12217309Snwhitehorn * documentation and/or other materials provided with the distribution. 13217309Snwhitehorn * 3. All advertising materials mentioning features or use of this software 14217309Snwhitehorn * must display the following acknowledgement: 15217309Snwhitehorn * This product includes software developed by the University of 16217309Snwhitehorn * California, Berkeley and its contributors. 17217309Snwhitehorn * 4. Neither the name of the University nor the names of its contributors 18217309Snwhitehorn * may be used to endorse or promote products derived from this software 19217309Snwhitehorn * without specific prior written permission. 20217309Snwhitehorn * 21217309Snwhitehorn * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22217309Snwhitehorn * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23217309Snwhitehorn * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24217309Snwhitehorn * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25217309Snwhitehorn * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26251843Sbapt * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27217309Snwhitehorn * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28217309Snwhitehorn * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29217309Snwhitehorn * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30217309Snwhitehorn * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31217309Snwhitehorn * SUCH DAMAGE. 32217309Snwhitehorn */ 33217309Snwhitehorn 34217309Snwhitehorn#include "includes.h" 35251843Sbapt 36217309Snwhitehorn#ifndef HAVE_DAEMON 37217309Snwhitehorn 38217309Snwhitehorn#if defined(LIBC_SCCS) && !defined(lint) 39217309Snwhitehornstatic char rcsid[] = "$OpenBSD: daemon.c,v 1.2 1996/08/19 08:22:13 tholo Exp $"; 40217309Snwhitehorn#endif /* LIBC_SCCS and not lint */ 41217309Snwhitehorn 42217309Snwhitehornint 43217309Snwhitehorndaemon(nochdir, noclose) 44217309Snwhitehorn int nochdir, noclose; 45217309Snwhitehorn{ 46217309Snwhitehorn int fd; 47217309Snwhitehorn 48217309Snwhitehorn switch (fork()) { 49251843Sbapt case -1: 50217309Snwhitehorn return (-1); 51217309Snwhitehorn case 0: 52217309Snwhitehorn#ifdef HAVE_CYGWIN 53217309Snwhitehorn register_9x_service(); 54217309Snwhitehorn#endif 55217309Snwhitehorn break; 56217309Snwhitehorn default: 57217309Snwhitehorn#ifdef HAVE_CYGWIN 58217309Snwhitehorn /* 59217309Snwhitehorn * This sleep avoids a race condition which kills the 60217309Snwhitehorn * child process if parent is started by a NT/W2K service. 61217309Snwhitehorn */ 62217309Snwhitehorn sleep(1); 63217309Snwhitehorn#endif 64217309Snwhitehorn _exit(0); 65217309Snwhitehorn } 66217309Snwhitehorn 67217309Snwhitehorn if (setsid() == -1) 68217309Snwhitehorn return (-1); 69217309Snwhitehorn 70217309Snwhitehorn if (!nochdir) 71217309Snwhitehorn (void)chdir("/"); 72217309Snwhitehorn 73217309Snwhitehorn if (!noclose && (fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) { 74217309Snwhitehorn (void)dup2(fd, STDIN_FILENO); 75217309Snwhitehorn (void)dup2(fd, STDOUT_FILENO); 76217309Snwhitehorn (void)dup2(fd, STDERR_FILENO); 77217309Snwhitehorn if (fd > 2) 78217309Snwhitehorn (void)close (fd); 79251843Sbapt } 80251843Sbapt return (0); 81251843Sbapt} 82251843Sbapt 83251843Sbapt#endif /* !HAVE_DAEMON */ 84217309Snwhitehorn 85217309Snwhitehorn