masqmail

annotate src/child.c @ 421:f37384470855

find changesets by author, revision, files, or words in the commit message
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
rev   line source
meillo@367 1 /*
meillo@367 2 ** child.c
meillo@367 3 ** Copyright (C) 2000 by Oliver Kurth,
meillo@367 4 **
meillo@367 5 ** This program is free software; you can redistribute it and/or modify
meillo@367 6 ** it under the terms of the GNU General Public License as published by
meillo@367 7 ** the Free Software Foundation; either version 2 of the License, or
meillo@367 8 ** (at your option) any later version.
meillo@367 9 **
meillo@367 10 ** This program is distributed in the hope that it will be useful,
meillo@367 11 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
meillo@367 12 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
meillo@367 13 ** GNU General Public License for more details.
meillo@367 14 **
meillo@367 15 ** You should have received a copy of the GNU General Public License
meillo@367 16 ** along with this program; if not, write to the Free Software
meillo@367 17 ** Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
meillo@367 18 */
meillo@0 19
meillo@0 20 #include <errno.h>
meillo@0 21 #include <stdio.h>
meillo@0 22 #include <stdlib.h>
meillo@0 23 #include <unistd.h>
meillo@0 24 #include <signal.h>
meillo@0 25 #include <sys/types.h>
meillo@0 26 #include <sys/socket.h>
meillo@0 27 #include <syslog.h>
meillo@0 28 #include <string.h>
meillo@0 29
meillo@0 30 #include "masqmail.h"
meillo@0 31
meillo@0 32
meillo@10 33 int
meillo@10 34 child(const char *command)
meillo@0 35 {
meillo@10 36 int pipe[2];
meillo@0 37
meillo@10 38 if (socketpair(AF_UNIX, SOCK_STREAM, 0, pipe) == 0) {
meillo@10 39 pid_t pid;
meillo@0 40
meillo@10 41 pid = fork();
meillo@391 42 if (pid == -1) {
meillo@391 43 return -1;
meillo@401 44
meillo@391 45 } else if (pid == 0) {
meillo@391 46 /* child */
meillo@401 47 char *argv[] = { "/bin/sh", "-c", (char *)command,
meillo@401 48 NULL };
meillo@10 49 int i, max_fd = sysconf(_SC_OPEN_MAX);
meillo@401 50
meillo@10 51 dup2(pipe[0], 0);
meillo@10 52 dup2(pipe[0], 1);
meillo@10 53 dup2(pipe[0], 2);
meillo@0 54
meillo@401 55 if (max_fd <= 0) {
meillo@10 56 max_fd = 64;
meillo@401 57 }
meillo@401 58 for (i = 3; i < max_fd; i++) {
meillo@10 59 close(i);
meillo@10 60 }
meillo@401 61 execve(*argv, argv, NULL);
meillo@391 62 logwrite(LOG_ALERT, "execve failed: %s\n",
meillo@391 63 strerror(errno));
meillo@262 64 _exit(1);
meillo@401 65
meillo@10 66 } else {
meillo@391 67 /* parent */
meillo@10 68 close(pipe[0]);
meillo@10 69 return pipe[1];
meillo@10 70 }
meillo@10 71 }
meillo@10 72 return -2;
meillo@0 73 }