1 /* $OpenBSD: wwspawn.c,v 1.10 2003/08/01 22:01:38 david Exp $ */ 2 /* $NetBSD: wwspawn.c,v 1.4 1995/12/21 08:39:57 mycroft Exp $ */ 3 4 /* 5 * Copyright (c) 1983, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Edward Wang at The University of California, Berkeley. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)wwspawn.c 8.1 (Berkeley) 6/6/93"; 39 #else 40 static char rcsid[] = "$OpenBSD: wwspawn.c,v 1.10 2003/08/01 22:01:38 david Exp $"; 41 #endif 42 #endif /* not lint */ 43 44 #include "ww.h" 45 #include <sys/signal.h> 46 #include <signal.h> 47 #include <unistd.h> 48 49 /* 50 * There is a dead lock with vfork and closing of pseudo-ports. 51 * So we have to be sneaky about error reporting. 52 */ 53 wwspawn(wp, file, argv) 54 struct ww *wp; 55 char *file; 56 char **argv; 57 { 58 pid_t pid; 59 pid_t ret; 60 char erred = 0; 61 sigset_t sigset, osigset; 62 63 sigemptyset(&sigset); 64 sigaddset(&sigset, SIGCHLD); 65 sigprocmask(SIG_BLOCK, &sigset, &osigset); 66 67 switch (pid = vfork()) { 68 case -1: 69 wwerrno = WWE_SYS; 70 ret = -1; 71 break; 72 case 0: 73 if (wwenviron(wp) >= 0) 74 execvp(file, argv); 75 erred = 1; 76 _exit(1); 77 default: 78 if (erred) { 79 wwerrno = WWE_SYS; 80 ret = -1; 81 } else { 82 wp->ww_pid = pid; 83 wp->ww_state = WWS_HASPROC; 84 ret = pid; 85 } 86 } 87 88 sigprocmask(SIG_SETMASK, &osigset, (sigset_t *)0); 89 90 if (wp->ww_socket >= 0) { 91 (void) close(wp->ww_socket); 92 wp->ww_socket = -1; 93 } 94 return ret; 95 } 96