1 /* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Edward Wang at The University of California, Berkeley. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)wwspawn.c 8.1 (Berkeley) 6/6/93 37 * $FreeBSD: src/usr.bin/window/wwspawn.c,v 1.4.2.1 2001/05/17 09:45:02 obrien Exp $ 38 * $DragonFly: src/usr.bin/window/wwspawn.c,v 1.2 2003/06/17 04:29:34 dillon Exp $ 39 */ 40 41 #include "ww.h" 42 #include <signal.h> 43 44 /* 45 * There is a dead lock with vfork and closing of pseudo-ports. 46 * So we have to be sneaky about error reporting. 47 */ 48 wwspawn(wp, file, argv) 49 register struct ww *wp; 50 char *file; 51 char **argv; 52 { 53 int pid; 54 int ret; 55 char erred = 0; 56 int s; 57 58 s = sigblock(sigmask(SIGCHLD)); 59 switch (pid = vfork()) { 60 case -1: 61 wwerrno = WWE_SYS; 62 ret = -1; 63 break; 64 case 0: 65 if (wwenviron(wp) >= 0) 66 execvp(file, argv); 67 erred = 1; 68 _exit(1); 69 default: 70 if (erred) { 71 wwerrno = WWE_SYS; 72 ret = -1; 73 } else { 74 wp->ww_pid = pid; 75 wp->ww_state = WWS_HASPROC; 76 ret = pid; 77 } 78 } 79 (void) sigsetmask(s); 80 if (wp->ww_socket >= 0) { 81 (void) close(wp->ww_socket); 82 wp->ww_socket = -1; 83 } 84 return ret; 85 } 86