11.10Sabs/* $NetBSD: daemon.c,v 1.10 2012/06/25 22:32:43 abs Exp $ */ 21.4Scgd 31.1Scgd/*- 41.4Scgd * Copyright (c) 1990, 1993 51.4Scgd * The Regents of the University of California. All rights reserved. 61.1Scgd * 71.1Scgd * Redistribution and use in source and binary forms, with or without 81.1Scgd * modification, are permitted provided that the following conditions 91.1Scgd * are met: 101.1Scgd * 1. Redistributions of source code must retain the above copyright 111.1Scgd * notice, this list of conditions and the following disclaimer. 121.1Scgd * 2. Redistributions in binary form must reproduce the above copyright 131.1Scgd * notice, this list of conditions and the following disclaimer in the 141.1Scgd * documentation and/or other materials provided with the distribution. 151.9Sagc * 3. Neither the name of the University nor the names of its contributors 161.1Scgd * may be used to endorse or promote products derived from this software 171.1Scgd * without specific prior written permission. 181.1Scgd * 191.1Scgd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 201.1Scgd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 211.1Scgd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 221.1Scgd * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 231.1Scgd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 241.1Scgd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 251.1Scgd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 261.1Scgd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 271.1Scgd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 281.1Scgd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 291.1Scgd * SUCH DAMAGE. 301.1Scgd */ 311.1Scgd 321.5Schristos#include <sys/cdefs.h> 331.1Scgd#if defined(LIBC_SCCS) && !defined(lint) 341.4Scgd#if 0 351.4Scgdstatic char sccsid[] = "@(#)daemon.c 8.1 (Berkeley) 6/4/93"; 361.4Scgd#else 371.10Sabs__RCSID("$NetBSD: daemon.c,v 1.10 2012/06/25 22:32:43 abs Exp $"); 381.4Scgd#endif 391.1Scgd#endif /* LIBC_SCCS and not lint */ 401.1Scgd 411.7Sjtc#include "namespace.h" 421.4Scgd#include <fcntl.h> 431.4Scgd#include <paths.h> 441.6Skleink#include <stdlib.h> 451.1Scgd#include <unistd.h> 461.7Sjtc 471.7Sjtc#ifdef __weak_alias 481.8Smycroft__weak_alias(daemon,_daemon) 491.7Sjtc#endif 501.1Scgd 511.4Scgdint 521.10Sabsdaemon(int nochdir, int noclose) 531.1Scgd{ 541.4Scgd int fd; 551.1Scgd 561.4Scgd switch (fork()) { 571.4Scgd case -1: 581.1Scgd return (-1); 591.4Scgd case 0: 601.4Scgd break; 611.4Scgd default: 621.4Scgd _exit(0); 631.4Scgd } 641.4Scgd 651.4Scgd if (setsid() == -1) 661.4Scgd return (-1); 671.4Scgd 681.1Scgd if (!nochdir) 691.4Scgd (void)chdir("/"); 701.4Scgd 711.4Scgd if (!noclose && (fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) { 721.4Scgd (void)dup2(fd, STDIN_FILENO); 731.4Scgd (void)dup2(fd, STDOUT_FILENO); 741.4Scgd (void)dup2(fd, STDERR_FILENO); 751.6Skleink if (fd > STDERR_FILENO) 761.6Skleink (void)close(fd); 771.1Scgd } 781.3Spk return (0); 791.1Scgd} 80