1 /* 2 * Copyright (c) 1997-2000 by Sun Microsystems, Inc. 3 * All rights reserved. 4 */ 5 6 #if defined(LIBC_SCCS) && !defined(lint) 7 static const char sccsid[] = "@(#)daemon.c 8.1 (Berkeley) 6/4/93"; 8 static const char rcsid[] = "$Id: daemon.c,v 8.2 1999/10/13 16:39:20 vixie Exp $"; 9 #endif /* LIBC_SCCS and not lint */ 10 11 /* 12 * Copyright (c) 1990, 1993 13 * The Regents of the University of California. All rights reserved. 14 * 15 * Redistribution and use in source and binary forms, with or without 16 * modification, are permitted provided that the following conditions 17 * are met: 18 * 1. Redistributions of source code must retain the above copyright 19 * notice, this list of conditions and the following disclaimer. 20 * 2. Redistributions in binary form must reproduce the above copyright 21 * notice, this list of conditions and the following disclaimer in the 22 * documentation and/or other materials provided with the distribution. 23 * 3. All advertising materials mentioning features or use of this software 24 * must display the following acknowledgement: 25 * This product includes software developed by the University of 26 * California, Berkeley and its contributors. 27 * 4. Neither the name of the University nor the names of its contributors 28 * may be used to endorse or promote products derived from this software 29 * without specific prior written permission. 30 * 31 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 32 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 33 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 34 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 35 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 39 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 40 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 41 * SUCH DAMAGE. 42 */ 43 44 #pragma ident "%Z%%M% %I% %E% SMI" 45 46 #include "port_before.h" 47 48 #include <fcntl.h> 49 #include <paths.h> 50 #include <unistd.h> 51 52 #include "port_after.h" 53 54 #ifndef NEED_DAEMON 55 int __bind_daemon__; 56 #else 57 58 int 59 daemon(int nochdir, int noclose) { 60 int fd; 61 62 switch (fork()) { 63 case -1: 64 return (-1); 65 case 0: 66 break; 67 default: 68 _exit(0); 69 } 70 71 if (setsid() == -1) 72 return (-1); 73 74 if (!nochdir) 75 (void)chdir("/"); 76 77 if (!noclose && (fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) { 78 (void)dup2(fd, STDIN_FILENO); 79 (void)dup2(fd, STDOUT_FILENO); 80 (void)dup2(fd, STDERR_FILENO); 81 if (fd > 2) 82 (void)close (fd); 83 } 84 return (0); 85 } 86 #endif 87