masqmail

view src/child.c @ 421:f37384470855

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Changed lockdir to /var/lock/masqmail; Create lockdir and piddir on startup. Moved the lockdir out of the spool dir. (When /var/lock is a ramdisk we do well to have the lock files there.) Added the new configure option --with-lockdir to change that location. Nontheless, if we run_as_user, then lock files are always stored in the spool dir directly. Instead of installing the lockdir and piddir at installation time, we create them on startup time now if they are missing. This is necessary if lockdir or piddir are a tmpfs.
author markus schnalke <meillo@marmaro.de>
date Wed, 30 May 2012 09:38:38 +0200
parents 0ca270ca11fa
children
line source
1 /*
2 ** child.c
3 ** Copyright (C) 2000 by Oliver Kurth,
4 **
5 ** This program is free software; you can redistribute it and/or modify
6 ** it under the terms of the GNU General Public License as published by
7 ** the Free Software Foundation; either version 2 of the License, or
8 ** (at your option) any later version.
9 **
10 ** This program is distributed in the hope that it will be useful,
11 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
12 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 ** GNU General Public License for more details.
14 **
15 ** You should have received a copy of the GNU General Public License
16 ** along with this program; if not, write to the Free Software
17 ** Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18 */
19
20 #include <errno.h>
21 #include <stdio.h>
22 #include <stdlib.h>
23 #include <unistd.h>
24 #include <signal.h>
25 #include <sys/types.h>
26 #include <sys/socket.h>
27 #include <syslog.h>
28 #include <string.h>
29
30 #include "masqmail.h"
31
32
33 int
34 child(const char *command)
35 {
36 int pipe[2];
37
38 if (socketpair(AF_UNIX, SOCK_STREAM, 0, pipe) == 0) {
39 pid_t pid;
40
41 pid = fork();
42 if (pid == -1) {
43 return -1;
44
45 } else if (pid == 0) {
46 /* child */
47 char *argv[] = { "/bin/sh", "-c", (char *)command,
48 NULL };
49 int i, max_fd = sysconf(_SC_OPEN_MAX);
50
51 dup2(pipe[0], 0);
52 dup2(pipe[0], 1);
53 dup2(pipe[0], 2);
54
55 if (max_fd <= 0) {
56 max_fd = 64;
57 }
58 for (i = 3; i < max_fd; i++) {
59 close(i);
60 }
61 execve(*argv, argv, NULL);
62 logwrite(LOG_ALERT, "execve failed: %s\n",
63 strerror(errno));
64 _exit(1);
65
66 } else {
67 /* parent */
68 close(pipe[0]);
69 return pipe[1];
70 }
71 }
72 return -2;
73 }