masqmail

annotate src/child.c @ 209:10da50168dab

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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 21:58:15 +0200
parents 26e34ae9a3e3
children fc1c6425c024
rev   line source
meillo@0 1 /* child.c, Copyright (C) 2000 by Oliver Kurth,
meillo@0 2 *
meillo@0 3 * This program is free software; you can redistribute it and/or modify
meillo@0 4 * it under the terms of the GNU General Public License as published by
meillo@0 5 * the Free Software Foundation; either version 2 of the License, or
meillo@0 6 * (at your option) any later version.
meillo@10 7 *
meillo@0 8 * This program is distributed in the hope that it will be useful,
meillo@0 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
meillo@0 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
meillo@0 11 * GNU General Public License for more details.
meillo@0 12 *
meillo@0 13 * You should have received a copy of the GNU General Public License
meillo@0 14 * along with this program; if not, write to the Free Software
meillo@0 15 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
meillo@0 16 */
meillo@0 17
meillo@0 18 #include <errno.h>
meillo@0 19 #include <stdio.h>
meillo@0 20 #include <stdlib.h>
meillo@0 21 #include <unistd.h>
meillo@0 22 #include <signal.h>
meillo@0 23 #include <sys/types.h>
meillo@0 24 #include <sys/socket.h>
meillo@0 25 #include <syslog.h>
meillo@0 26 #include <string.h>
meillo@0 27
meillo@0 28 #include "masqmail.h"
meillo@0 29
meillo@0 30
meillo@10 31 int
meillo@10 32 child(const char *command)
meillo@0 33 {
meillo@10 34 int pipe[2];
meillo@0 35
meillo@10 36 if (socketpair(AF_UNIX, SOCK_STREAM, 0, pipe) == 0) {
meillo@10 37 pid_t pid;
meillo@0 38
meillo@10 39 pid = fork();
meillo@10 40 if (pid == 0) {
meillo@10 41 int i, max_fd = sysconf(_SC_OPEN_MAX);
meillo@10 42 /* child */
meillo@10 43 dup2(pipe[0], 0);
meillo@10 44 dup2(pipe[0], 1);
meillo@10 45 dup2(pipe[0], 2);
meillo@0 46
meillo@10 47 if (max_fd <= 0)
meillo@10 48 max_fd = 64;
meillo@10 49 for (i = 3; i < max_fd; i++)
meillo@10 50 close(i);
meillo@10 51
meillo@10 52 {
meillo@10 53 char *argv[] = { "/bin/sh", "-c", (char *) command, NULL };
meillo@10 54 execve(*argv, argv, NULL);
meillo@10 55 }
meillo@10 56 logwrite(LOG_ALERT, "execve failed: %s\n", strerror(errno));
meillo@10 57 _exit(EXIT_FAILURE);
meillo@10 58 } else if (pid == -1) {
meillo@10 59 return -1;
meillo@10 60 } else {
meillo@10 61 close(pipe[0]);
meillo@10 62 return pipe[1];
meillo@10 63 }
meillo@10 64 }
meillo@10 65 return -2;
meillo@0 66 }