1 /* @(#)wwspawn.c 8.1 (Berkeley) 6/6/93 */ 2 /* $NetBSD: wwspawn.c,v 1.10 2006/12/18 20:04:55 christos 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 #include <signal.h> 37 #include <unistd.h> 38 #include "ww.h" 39 40 /* 41 * There is a dead lock with vfork and closing of pseudo-ports. 42 * So we have to be sneaky about error reporting. 43 */ 44 int 45 wwspawn(struct ww *wp, char *file, char **argv) 46 { 47 int pid; 48 int ret; 49 char volatile erred; 50 sigset_t nsigset, osigset; 51 52 erred = 0; 53 54 sigemptyset(&nsigset); 55 sigaddset(&nsigset, SIGCHLD); 56 sigprocmask(SIG_BLOCK, &nsigset, &osigset); 57 58 switch (pid = vfork()) { 59 case -1: 60 wwerrno = WWE_SYS; 61 ret = -1; 62 break; 63 case 0: 64 if (wwenviron(wp) >= 0) 65 execvp(file, argv); 66 erred = 1; 67 _exit(1); 68 default: 69 if (erred) { 70 wwerrno = WWE_SYS; 71 ret = -1; 72 } else { 73 wp->ww_pid = pid; 74 wp->ww_state = WWS_HASPROC; 75 ret = pid; 76 } 77 } 78 79 sigprocmask(SIG_SETMASK, &osigset, (sigset_t *)0); 80 81 if (wp->ww_socket >= 0) { 82 (void) close(wp->ww_socket); 83 wp->ww_socket = -1; 84 } 85 return ret; 86 } 87