Admin/exec_process/exec_process.c

   fclose(pid_file);
 
 
   /* setsid */
 
-  if (getgid() == getpid()) fail("Cannot set session id");
-  setsid();
+  if (setsid() == -1) {
+    pid_t pid = fork();
+    if (pid == -1) fail("Cannot set session id (failed to fork)");
+    else if (pid != 0) exit(0);
+    else if (setsid() == -1) fail("Cannot set session id (after fork)");
+  }
 
 
   /* exec */
 
   char *cmd_line[4];