/* Virtual terminal interface shell. * Copyright (C) 2000 Kunihiro Ishiguro * * This file is part of GNU Zebra. * * GNU Zebra 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, or (at your option) any * later version. * * GNU Zebra 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 GNU Zebra; see the file COPYING.  If not, write to the Free * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA * 02111-1307, USA.   */#include <zebra.h>#include <sys/un.h>#include <setjmp.h>#include <sys/wait.h>#include <pwd.h>//huxuekun#include <unistd.h>#include <termios.h>#include <readline/readline.h>#include <readline/history.h>#include "thread.h"#include "version.h"#include "getopt.h"#include "command.h"#include "memory.h"//#include "log.h"#include "prefix.h"#include "sys_status.h"#include "vtysh/vtysh_user.h" //#include "sys_ssl.h"extern int Debug;int verify_client=0;struct thread_master *master;/* SIGTSTP handler.  This function care user's ^Z input. */voidrestart_status_connect_all (int sig){  syslog (LOG_INFO, "trap sigusr1");  status_connect_close ();  status_connect_all ();}/**  * @brief: SIGUSR1 handler. * @description: show error messages , then exit */intmain (int argc, char **argv, char **env){  int opt ;  static char optstr[]="dv";  struct thread thread;  while ((opt = getopt (argc, argv, optstr))!=-1)     {           switch (opt) 	{	case 0:	  break;	case 'd':	  Debug = 1;	  break;	 case 'v':	  verify_client = 1;	  break;	  	default:	  	  break;	}	      }    master = thread_master_create ();  if(!Debug) if (fork ())	      exit(0); ssl_init(); status_serv_inet(); status_connect_all ();  //jhb add 2004-04-08, we must after vtysh_connect_all  //because we transfer hostname to syslogd  #ifdef WATCH_DOG//huxuekun: 2003.2.10  init_watch_dog();  thread_add_timer(master, watch_dog, NULL, WATCHDOG_TIMER);#endif 	   while (thread_fetch (master, &thread))    thread_call (&thread);  /* Not reached... */#ifdef WATCH_DOG  stop_watch_dog();#endif  exit (0);  }#ifdef WATCH_DOG/* huxuekun: 2003.2.10 * */static void init_watch_dog(void){  printf("in init_wathc_dog\n");  iopl(3);  outb(WATCHDOG_TIMER_INTVAL, WATCHDOG_TIMER_PORT);  inb(WATCHDOG_TIMER_START); //start watch_dog counter}int watch_dog(struct thread *t){  inb(WATCHDOG_TIMER_STOP); //stop watch_dog counter  inb(WATCHDOG_TIMER_START); //restart watch_dog counter//  syslog(LOG_INFO, "watch_dog works!");  //for test  thread_add_timer(master, watch_dog, NULL, WATCHDOG_TIMER);}static void stop_watch_dog(void){  inb(WATCHDOG_TIMER_STOP); //stop watch_dog counter}	#endif // end WATCH_DO