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
wwspawn(struct ww * wp,char * file,char ** argv)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