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 37 #ifndef lint 38 static char sccsid[] = "@(#)wwspawn.c 8.1 (Berkeley) 6/6/93"; 39 static char rcsid[] = 40 "$FreeBSD: src/usr.bin/window/wwspawn.c,v 1.4.2.1 2001/05/17 09:45:02 obrien Exp $"; 41 #endif /* not lint */ 42 43 #include "ww.h" 44 #include <signal.h> 45 46 /* 47 * There is a dead lock with vfork and closing of pseudo-ports. 48 * So we have to be sneaky about error reporting. 49 */ 50 wwspawn(wp, file, argv) 51 register struct ww *wp; 52 char *file; 53 char **argv; 54 { 55 int pid; 56 int ret; 57 char erred = 0; 58 int s; 59 60 s = sigblock(sigmask(SIGCHLD)); 61 switch (pid = vfork()) { 62 case -1: 63 wwerrno = WWE_SYS; 64 ret = -1; 65 break; 66 case 0: 67 if (wwenviron(wp) >= 0) 68 execvp(file, argv); 69 erred = 1; 70 _exit(1); 71 default: 72 if (erred) { 73 wwerrno = WWE_SYS; 74 ret = -1; 75 } else { 76 wp->ww_pid = pid; 77 wp->ww_state = WWS_HASPROC; 78 ret = pid; 79 } 80 } 81 (void) sigsetmask(s); 82 if (wp->ww_socket >= 0) { 83 (void) close(wp->ww_socket); 84 wp->ww_socket = -1; 85 } 86 return ret; 87 } 88