+
−/* child.c, Copyright (C) 2000 by Oliver Kurth,
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− *
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− * This program is free software; you can redistribute it and/or modify
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− * it under the terms of the GNU General Public License as published by
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− * the Free Software Foundation; either version 2 of the License, or
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− * (at your option) any later version.
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− *
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− * This program is distributed in the hope that it will be useful,
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− * but WITHOUT ANY WARRANTY; without even the implied warranty of
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− * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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− * GNU General Public License for more details.
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− *
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− * You should have received a copy of the GNU General Public License
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− * along with this program; if not, write to the Free Software
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− * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
− */
+
−
+
−#include <errno.h>
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−#include <stdio.h>
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−#include <stdlib.h>
+
−#include <unistd.h>
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−#include <signal.h>
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−#include <sys/types.h>
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−#include <sys/socket.h>
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−#include <syslog.h>
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−#include <string.h>
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−
+
−#include "masqmail.h"
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−
+
−
+
−int
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−child(const char *command)
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−{
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−	int pipe[2];
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−
+
−	if (socketpair(AF_UNIX, SOCK_STREAM, 0, pipe) == 0) {
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−		pid_t pid;
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−
+
−		pid = fork();
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−		if (pid == 0) {
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−			int i, max_fd = sysconf(_SC_OPEN_MAX);
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−			/* child */
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−			dup2(pipe[0], 0);
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−			dup2(pipe[0], 1);
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−			dup2(pipe[0], 2);
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−
+
−			if (max_fd <= 0)
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−				max_fd = 64;
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−			for (i = 3; i < max_fd; i++)
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−				close(i);
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−
+
−			{
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−				char *argv[] = { "/bin/sh", "-c", (char *) command, NULL };
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−				execve(*argv, argv, NULL);
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−			}
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−			logwrite(LOG_ALERT, "execve failed: %s\n", strerror(errno));
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−			_exit(EXIT_FAILURE);
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−		} else if (pid == -1) {
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−			return -1;
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−		} else {
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−			close(pipe[0]);
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−			return pipe[1];
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−		}
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−	}
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−	return -2;
+
−}