1 /* $NetBSD: wwspawn.c,v 1.10 2006/12/18 20:04:55 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Edward Wang at The University of California, Berkeley. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)wwspawn.c 8.1 (Berkeley) 6/6/93"; 39 #else 40 __RCSID("$NetBSD: wwspawn.c,v 1.10 2006/12/18 20:04:55 christos Exp $"); 41 #endif 42 #endif /* not lint */ 43 44 #include <signal.h> 45 #include <unistd.h> 46 #include "ww.h" 47 48 /* 49 * There is a dead lock with vfork and closing of pseudo-ports. 50 * So we have to be sneaky about error reporting. 51 */ 52 int 53 wwspawn(struct ww *wp, char *file, char **argv) 54 { 55 int pid; 56 int ret; 57 char volatile erred; 58 sigset_t nsigset, osigset; 59 60 erred = 0; 61 62 sigemptyset(&nsigset); 63 sigaddset(&nsigset, SIGCHLD); 64 sigprocmask(SIG_BLOCK, &nsigset, &osigset); 65 66 switch (pid = vfork()) { 67 case -1: 68 wwerrno = WWE_SYS; 69 ret = -1; 70 break; 71 case 0: 72 if (wwenviron(wp) >= 0) 73 execvp(file, argv); 74 erred = 1; 75 _exit(1); 76 default: 77 if (erred) { 78 wwerrno = WWE_SYS; 79 ret = -1; 80 } else { 81 wp->ww_pid = pid; 82 wp->ww_state = WWS_HASPROC; 83 ret = pid; 84 } 85 } 86 87 sigprocmask(SIG_SETMASK, &osigset, (sigset_t *)0); 88 89 if (wp->ww_socket >= 0) { 90 (void) close(wp->ww_socket); 91 wp->ww_socket = -1; 92 } 93 return ret; 94 } 95