--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/child.c	Fri Sep 26 17:05:23 2008 +0200
@@ -0,0 +1,79 @@
+/* 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 volatile sigchild_seen = 0;
+
+static
+void sigchild_handler(int sig)
+{
+  sigchild_seen = 1;
+  signal(SIGHUP, sigchild_handler);
+}
+
+int child(const char *command)
+{
+  int pipe[2];
+
+  if (socketpair(AF_UNIX, SOCK_STREAM, 0, pipe) == 0){
+    pid_t pid;
+      
+    /*
+    sigchild_seen = 0;
+    signal(SIGCHLD, sigchild_handler);
+    */
+
+    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;
+}
+
+