masqmail-0.2
view src/child.c @ 162:52c82d755215
replaced the MD5 implementation with the one of Solar Designer
Until now, the sample code of RFC 1321 was used. It had an ugly license.
Now we use the implementation of Solar Designer, which is in the Public Domain.
http://openwall.info/wiki/people/solar/software/public-domain-source-code/md5
| author | meillo@marmaro.de |
|---|---|
| date | Sun, 18 Jul 2010 22:01:04 +0200 |
| parents | 26e34ae9a3e3 |
| children |
line source
1 /* child.c, Copyright (C) 2000 by Oliver Kurth,
2 *
3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License as published by
5 * the Free Software Foundation; either version 2 of the License, or
6 * (at your option) any later version.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
16 */
18 #include <errno.h>
19 #include <stdio.h>
20 #include <stdlib.h>
21 #include <unistd.h>
22 #include <signal.h>
23 #include <sys/types.h>
24 #include <sys/socket.h>
25 #include <syslog.h>
26 #include <string.h>
28 #include "masqmail.h"
31 int
32 child(const char *command)
33 {
34 int pipe[2];
36 if (socketpair(AF_UNIX, SOCK_STREAM, 0, pipe) == 0) {
37 pid_t pid;
39 pid = fork();
40 if (pid == 0) {
41 int i, max_fd = sysconf(_SC_OPEN_MAX);
42 /* child */
43 dup2(pipe[0], 0);
44 dup2(pipe[0], 1);
45 dup2(pipe[0], 2);
47 if (max_fd <= 0)
48 max_fd = 64;
49 for (i = 3; i < max_fd; i++)
50 close(i);
52 {
53 char *argv[] = { "/bin/sh", "-c", (char *) command, NULL };
54 execve(*argv, argv, NULL);
55 }
56 logwrite(LOG_ALERT, "execve failed: %s\n", strerror(errno));
57 _exit(EXIT_FAILURE);
58 } else if (pid == -1) {
59 return -1;
60 } else {
61 close(pipe[0]);
62 return pipe[1];
63 }
64 }
65 return -2;
66 }