view src/child.c @ 171:349518b940db

added support for STARTTLS wrappers added the route config option `instant_helo' which causes masqmail, as SMTP client, not to wait for the server's 220 greeting. Instead if says EHLO right at once. You'll need this for STARTTLS wrappers that usually eat the greeting line.
author meillo@marmaro.de
date Thu, 22 Jul 2010 23:30:05 +0200
parents 98cda87105a7
children
line wrap: on
line source

/* child.c, Copyright (C) 2000 by Oliver Kurth,
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <syslog.h>
#include <string.h>

#include "masqmail.h"


int
child(const char *command)
{
	int pipe[2];

	if (socketpair(AF_UNIX, SOCK_STREAM, 0, pipe) == 0) {
		pid_t pid;

		pid = fork();
		if (pid == 0) {
			int i, max_fd = sysconf(_SC_OPEN_MAX);
			/* child */
			dup2(pipe[0], 0);
			dup2(pipe[0], 1);
			dup2(pipe[0], 2);

			if (max_fd <= 0)
				max_fd = 64;
			for (i = 3; i < max_fd; i++)
				close(i);

			{
				char *argv[] = { "/bin/sh", "-c", (char *) command, NULL };
				execve(*argv, argv, NULL);
			}
			logwrite(LOG_ALERT, "execve failed: %s\n", strerror(errno));
			_exit(EXIT_FAILURE);
		} else if (pid == -1) {
			return -1;
		} else {
			close(pipe[0]);
			return pipe[1];
		}
	}
	return -2;
}