[mirror_frr.git] / vtysh / vtysh_main.c

/* 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>

#include <readline/readline.h>
#include <readline/history.h>

#include <lib/version.h>
#include "getopt.h"
#include "command.h"
#include "memory.h"

#include "vtysh/vtysh.h"
#include "vtysh/vtysh_user.h"

/* VTY shell program name. */
char *progname;

/* Configuration file name and directory. */
char config_default[] = SYSCONFDIR VTYSH_DEFAULT_CONFIG;
char history_file[MAXPATHLEN];

/* Flag for indicate executing child command. */
int execute_flag = 0;

/* For sigsetjmp() & siglongjmp(). */
static sigjmp_buf jmpbuf;

/* Flag for avoid recursive siglongjmp() call. */
static int jmpflag = 0;

/* A static variable for holding the line. */
static char *line_read;

/* Master of threads. */
struct thread_master *master;

/* Command logging */
FILE *logfile;

/* SIGTSTP handler.  This function care user's ^Z input. */
void
sigtstp (int sig)
{
  /* Execute "end" command. */
  vtysh_execute ("end");
  
  /* Initialize readline. */
  rl_initialize ();
  printf ("\n");

  /* Check jmpflag for duplicate siglongjmp(). */
  if (! jmpflag)
    return;

  jmpflag = 0;

  /* Back to main command loop. */
  siglongjmp (jmpbuf, 1);
}

/* SIGINT handler.  This function care user's ^Z input.  */
void
sigint (int sig)
{
  /* Check this process is not child process. */
  if (! execute_flag)
    {
      rl_initialize ();
      printf ("\n");
      rl_forced_update_display ();
    }
}

/* Signale wrapper for vtysh. We don't use sigevent because
 * vtysh doesn't use threads. TODO */
RETSIGTYPE *
vtysh_signal_set (int signo, void (*func)(int))
{
  int ret;
  struct sigaction sig;
  struct sigaction osig;

  sig.sa_handler = func;
  sigemptyset (&sig.sa_mask);
  sig.sa_flags = 0;
#ifdef SA_RESTART
  sig.sa_flags |= SA_RESTART;
#endif /* SA_RESTART */

  ret = sigaction (signo, &sig, &osig);

  if (ret < 0) 
    return (SIG_ERR);
  else
    return (osig.sa_handler);
}

/* Initialization of signal handles. */
void
vtysh_signal_init ()
{
  vtysh_signal_set (SIGINT, sigint);
  vtysh_signal_set (SIGTSTP, sigtstp);
  vtysh_signal_set (SIGPIPE, SIG_IGN);
}

/* Help information display. */
static void
usage (int status)
{
  if (status != 0)
    fprintf (stderr, "Try `%s --help' for more information.\n", progname);
  else
    printf ("Usage : %s [OPTION...]\n\n" \
	    "Integrated shell for Quagga routing software suite. \n\n" \
	    "-b, --boot               Execute boot startup configuration\n" \
	    "-c, --command            Execute argument as command\n" \
	    "-d, --daemon             Connect only to the specified daemon\n" \
	    "-E, --echo               Echo prompt and command in -c mode\n" \
	    "-C, --dryrun             Check configuration for validity and exit\n" \
	    "-h, --help               Display this help and exit\n\n" \
	    "Note that multiple commands may be executed from the command\n" \
	    "line by passing multiple -c args, or by embedding linefeed\n" \
	    "characters in one or more of the commands.\n\n" \
	    "Report bugs to %s\n", progname, ZEBRA_BUG_ADDRESS);

  exit (status);
}

/* VTY shell options, we use GNU getopt library. */
struct option longopts[] = 
{
  { "boot",                 no_argument,             NULL, 'b'},
  /* For compatibility with older zebra/quagga versions */
  { "eval",                 required_argument,       NULL, 'e'},
  { "command",              required_argument,       NULL, 'c'},
  { "daemon",               required_argument,       NULL, 'd'},
  { "echo",                 no_argument,             NULL, 'E'},
  { "dryrun",		    no_argument,	     NULL, 'C'},
  { "help",                 no_argument,             NULL, 'h'},
  { "noerror",		    no_argument,	     NULL, 'n'},
  { 0 }
};

/* Read a string, and return a pointer to it.  Returns NULL on EOF. */
char *
vtysh_rl_gets ()
{
  HIST_ENTRY *last;
  /* If the buffer has already been allocated, return the memory
   * to the free pool. */
  if (line_read)
    {
      free (line_read);
      line_read = NULL;
    }
     
  /* Get a line from the user.  Change prompt according to node.  XXX. */
  line_read = readline (vtysh_prompt ());
     
  /* If the line has any text in it, save it on the history. But only if
   * last command in history isn't the same one. */
  if (line_read && *line_read)
    {
      using_history();
      last = previous_history();
      if (!last || strcmp (last->line, line_read) != 0) {
	add_history (line_read);
	append_history(1,history_file);
      }
    }
     
  return (line_read);
}

static void log_it(const char *line)
{
  time_t t = time(NULL);
  struct tm *tmp = localtime(&t);
  char *user = getenv("USER") ? : "boot";
  char tod[64];

  strftime(tod, sizeof tod, "%Y%m%d-%H:%M.%S", tmp);
  
  fprintf(logfile, "%s:%s %s\n", tod, user, line);
}

/* VTY shell main routine. */
int
main (int argc, char **argv, char **env)
{
  char *p;
  int opt;
  int dryrun = 0;
  int boot_flag = 0;
  const char *daemon_name = NULL;
  struct cmd_rec {
    const char *line;
    struct cmd_rec *next;
  } *cmd = NULL;
  struct cmd_rec *tail = NULL;
  int echo_command = 0;
  int no_error = 0;

  /* Preserve name of myself. */
  progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]);

  /* if logging open now */
  if ((p = getenv("VTYSH_LOG")) != NULL)
      logfile = fopen(p, "a");

  /* Option handling. */
  while (1) 
    {
      opt = getopt_long (argc, argv, "be:c:d:nEhC", longopts, 0);
    
      if (opt == EOF)
	break;

      switch (opt) 
	{
	case 0:
	  break;
	case 'b':
	  boot_flag = 1;
	  break;
	case 'e':
	case 'c':
	  {
	    struct cmd_rec *cr;
	    cr = XMALLOC(0, sizeof(*cr));
	    cr->line = optarg;
	    cr->next = NULL;
	    if (tail)
	      tail->next = cr;
	    else
	      cmd = cr;
	    tail = cr;
	  }
	  break;
	case 'd':
	  daemon_name = optarg;
	  break;
	case 'n':
	  no_error = 1;
	  break;
	case 'E':
	  echo_command = 1;
	  break;
	case 'C':
	  dryrun = 1;
	  break;
	case 'h':
	  usage (0);
	  break;
	default:
	  usage (1);
	  break;
	}
    }

  /* Initialize user input buffer. */
  line_read = NULL;
  setlinebuf(stdout);

  /* Signal and others. */
  vtysh_signal_init ();

  /* Make vty structure and register commands. */
  vtysh_init_vty ();
  vtysh_init_cmd ();
  vtysh_user_init ();
  vtysh_config_init ();

  vty_init_vtysh ();

  /* Read vtysh configuration file before connecting to daemons. */
  vtysh_read_config (config_default);

  /* Start execution only if not in dry-run mode */
  if(dryrun)
    return(0);
  
  /* Ignore error messages */
  if (no_error)
    freopen("/dev/null", "w", stdout);

  /* Make sure we pass authentication before proceeding. */
  vtysh_auth ();

  /* Do not connect until we have passed authentication. */
  if (vtysh_connect_all (daemon_name) <= 0)
    {
      fprintf(stderr, "Exiting: failed to connect to any daemons.\n");
      exit(1);
    }

  /* If eval mode. */
  if (cmd)
    {
      /* Enter into enable node. */
      vtysh_execute ("enable");

      while (cmd != NULL)
        {
	  int ret;
	  char *eol;

	  while ((eol = strchr(cmd->line, '\n')) != NULL)
	    {
	      *eol = '\0';

	      if (echo_command)
		printf("%s%s\n", vtysh_prompt(), cmd->line);
	      
	      if (logfile)
		log_it(cmd->line);

	      ret = vtysh_execute_no_pager(cmd->line);
	      if (!no_error &&
		  ! (ret == CMD_SUCCESS ||
		     ret == CMD_SUCCESS_DAEMON ||
		     ret == CMD_WARNING))
		exit(1);

	      cmd->line = eol+1;
	    }

	  if (echo_command)
	    printf("%s%s\n", vtysh_prompt(), cmd->line);

	  if (logfile)
	    log_it(cmd->line);

	  ret = vtysh_execute_no_pager(cmd->line);
	  if (!no_error &&
	      ! (ret == CMD_SUCCESS ||
		 ret == CMD_SUCCESS_DAEMON ||
		 ret == CMD_WARNING))
	    exit(1);

	  {
	    struct cmd_rec *cr;
	    cr = cmd;
	    cmd = cmd->next;
	    XFREE(0, cr);
	  }
        }
      exit (0);
    }
  
  /* Boot startup configuration file. */
  if (boot_flag)
    {
      if (vtysh_read_config (integrate_default))
	{
	  fprintf (stderr, "Can't open configuration file [%s]\n",
		   integrate_default);
	  exit (1);
	}
      else
	exit (0);
    }

  vtysh_pager_init ();

  vtysh_readline_init ();

  vty_hello (vty);

  /* Enter into enable node. */
  vtysh_execute ("enable");

  /* Preparation for longjmp() in sigtstp(). */
  sigsetjmp (jmpbuf, 1);
  jmpflag = 1;

  snprintf(history_file, sizeof(history_file), "%s/.history_quagga", getenv("HOME"));
  read_history(history_file);
  /* Main command loop. */
  while (vtysh_rl_gets ())
    vtysh_execute (line_read);

  history_truncate_file(history_file,1000);
  printf ("\n");

  /* Rest in peace. */
  exit (0);
}
Commit	Line	Data
718e3744	1	/* Virtual terminal interface shell.
	2	* Copyright (C) 2000 Kunihiro Ishiguro
	3	*
	4	* This file is part of GNU Zebra.
	5	*
	6	* GNU Zebra is free software; you can redistribute it and/or modify it
	7	* under the terms of the GNU General Public License as published by the
	8	* Free Software Foundation; either version 2, or (at your option) any
	9	* later version.
	10	*
	11	* GNU Zebra is distributed in the hope that it will be useful, but
	12	* WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	* General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with GNU Zebra; see the file COPYING. If not, write to the Free
	18	* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
	19	* 02111-1307, USA.
	20	*/
	21
	22	#include <zebra.h>
	23
	24	#include <sys/un.h>
	25	#include <setjmp.h>
	26	#include <sys/wait.h>
	27	#include <pwd.h>
	28
	29	#include <readline/readline.h>
	30	#include <readline/history.h>
	31
5e4fa164	32	#include <lib/version.h>
718e3744	33	#include "getopt.h"
718e3744	34	#include "command.h"
f366ad31	35	#include "memory.h"
718e3744	36
	37	#include "vtysh/vtysh.h"
	38	#include "vtysh/vtysh_user.h"
b094d260	39
718e3744	40	/* VTY shell program name. */
	41	char *progname;
	42
67e29abc	43	/* Configuration file name and directory. */
718e3744	44	char config_default[] = SYSCONFDIR VTYSH_DEFAULT_CONFIG;
3f4ab7f9	45	char history_file[MAXPATHLEN];
718e3744	46
718e3744	47	/* Flag for indicate executing child command. */
	48	int execute_flag = 0;
	49
	50	/* For sigsetjmp() & siglongjmp(). */
	51	static sigjmp_buf jmpbuf;
	52
	53	/* Flag for avoid recursive siglongjmp() call. */
	54	static int jmpflag = 0;
	55
	56	/* A static variable for holding the line. */
	57	static char *line_read;
	58
	59	/* Master of threads. */
	60	struct thread_master *master;
b094d260	61
57fb9748 SH	62	/* Command logging */
	63	FILE *logfile;
	64
718e3744	65	/* SIGTSTP handler. This function care user's ^Z input. */
	66	void
	67	sigtstp (int sig)
	68	{
	69	/* Execute "end" command. */
	70	vtysh_execute ("end");
	71
	72	/* Initialize readline. */
	73	rl_initialize ();
	74	printf ("\n");
	75
	76	/* Check jmpflag for duplicate siglongjmp(). */
	77	if (! jmpflag)
	78	return;
	79
	80	jmpflag = 0;
	81
	82	/* Back to main command loop. */
	83	siglongjmp (jmpbuf, 1);
	84	}
	85
	86	/* SIGINT handler. This function care user's ^Z input. */
	87	void
	88	sigint (int sig)
	89	{
	90	/* Check this process is not child process. */
	91	if (! execute_flag)
	92	{
	93	rl_initialize ();
	94	printf ("\n");
	95	rl_forced_update_display ();
	96	}
	97	}
	98
e42f5a37	99	/* Signale wrapper for vtysh. We don't use sigevent because
e42f5a37	100	* vtysh doesn't use threads. TODO */
718e3744	101	RETSIGTYPE *
e42f5a37	102	vtysh_signal_set (int signo, void (*func)(int))
718e3744	103	{
	104	int ret;
	105	struct sigaction sig;
	106	struct sigaction osig;
	107
	108	sig.sa_handler = func;
	109	sigemptyset (&sig.sa_mask);
	110	sig.sa_flags = 0;
	111	#ifdef SA_RESTART
	112	sig.sa_flags \|= SA_RESTART;
	113	#endif /* SA_RESTART */
	114
	115	ret = sigaction (signo, &sig, &osig);
	116
	117	if (ret < 0)
	118	return (SIG_ERR);
	119	else
	120	return (osig.sa_handler);
	121	}
	122
	123	/* Initialization of signal handles. */
	124	void
e42f5a37	125	vtysh_signal_init ()
718e3744	126	{
e42f5a37	127	vtysh_signal_set (SIGINT, sigint);
	128	vtysh_signal_set (SIGTSTP, sigtstp);
	129	vtysh_signal_set (SIGPIPE, SIG_IGN);
718e3744	130	}
b094d260	131
718e3744	132	/* Help information display. */
	133	static void
	134	usage (int status)
	135	{
	136	if (status != 0)
	137	fprintf (stderr, "Try `%s --help' for more information.\n", progname);
	138	else
95e735b5	139	printf ("Usage : %s [OPTION...]\n\n" \
f366ad31	140	"Integrated shell for Quagga routing software suite. \n\n" \
95e735b5	141	"-b, --boot Execute boot startup configuration\n" \
f366ad31 AS	142	"-c, --command Execute argument as command\n" \
	143	"-d, --daemon Connect only to the specified daemon\n" \
	144	"-E, --echo Echo prompt and command in -c mode\n" \
876b8be0	145	"-C, --dryrun Check configuration for validity and exit\n" \
95e735b5	146	"-h, --help Display this help and exit\n\n" \
f366ad31 AS	147	"Note that multiple commands may be executed from the command\n" \
	148	"line by passing multiple -c args, or by embedding linefeed\n" \
	149	"characters in one or more of the commands.\n\n" \
95e735b5	150	"Report bugs to %s\n", progname, ZEBRA_BUG_ADDRESS);
95e735b5	151
718e3744	152	exit (status);
	153	}
	154
	155	/* VTY shell options, we use GNU getopt library. */
	156	struct option longopts[] =
	157	{
b094d260	158	{ "boot", no_argument, NULL, 'b'},
4991f6ca	159	/* For compatibility with older zebra/quagga versions */
718e3744	160	{ "eval", required_argument, NULL, 'e'},
4991f6ca	161	{ "command", required_argument, NULL, 'c'},
f366ad31 AS	162	{ "daemon", required_argument, NULL, 'd'},
f366ad31 AS	163	{ "echo", no_argument, NULL, 'E'},
876b8be0	164	{ "dryrun", no_argument, NULL, 'C'},
718e3744	165	{ "help", no_argument, NULL, 'h'},
914131f8	166	{ "noerror", no_argument, NULL, 'n'},
718e3744	167	{ 0 }
718e3744	168	};
b094d260	169
718e3744	170	/* Read a string, and return a pointer to it. Returns NULL on EOF. */
	171	char *
	172	vtysh_rl_gets ()
	173	{
4991f6ca	174	HIST_ENTRY *last;
718e3744	175	/* If the buffer has already been allocated, return the memory
95e735b5	176	* to the free pool. */
718e3744	177	if (line_read)
	178	{
	179	free (line_read);
	180	line_read = NULL;
	181	}
	182
	183	/* Get a line from the user. Change prompt according to node. XXX. */
	184	line_read = readline (vtysh_prompt ());
	185
4991f6ca	186	/* If the line has any text in it, save it on the history. But only if
95e735b5	187	* last command in history isn't the same one. */
718e3744	188	if (line_read && *line_read)
4991f6ca	189	{
	190	using_history();
	191	last = previous_history();
3f4ab7f9	192	if (!last \|\| strcmp (last->line, line_read) != 0) {
4991f6ca	193	add_history (line_read);
3f4ab7f9 TP	194	append_history(1,history_file);
3f4ab7f9 TP	195	}
4991f6ca	196	}
718e3744	197
	198	return (line_read);
	199	}
b094d260	200
57fb9748 SH	201	static void log_it(const char *line)
	202	{
	203	time_t t = time(NULL);
	204	struct tm *tmp = localtime(&t);
	205	char *user = getenv("USER") ? : "boot";
	206	char tod[64];
	207
	208	strftime(tod, sizeof tod, "%Y%m%d-%H:%M.%S", tmp);
	209
	210	fprintf(logfile, "%s:%s %s\n", tod, user, line);
	211	}
	212
718e3744	213	/* VTY shell main routine. */
	214	int
	215	main (int argc, char argv, char env)
	216	{
	217	char *p;
	218	int opt;
876b8be0	219	int dryrun = 0;
718e3744	220	int boot_flag = 0;
f366ad31 AS	221	const char *daemon_name = NULL;
	222	struct cmd_rec {
	223	const char *line;
	224	struct cmd_rec *next;
	225	} *cmd = NULL;
	226	struct cmd_rec *tail = NULL;
	227	int echo_command = 0;
914131f8	228	int no_error = 0;
718e3744	229
	230	/* Preserve name of myself. */
	231	progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]);
	232
57fb9748 SH	233	/* if logging open now */
	234	if ((p = getenv("VTYSH_LOG")) != NULL)
	235	logfile = fopen(p, "a");
	236
718e3744	237	/* Option handling. */
	238	while (1)
	239	{
914131f8	240	opt = getopt_long (argc, argv, "be:c:d:nEhC", longopts, 0);
718e3744	241
	242	if (opt == EOF)
	243	break;
	244
	245	switch (opt)
	246	{
	247	case 0:
	248	break;
	249	case 'b':
	250	boot_flag = 1;
	251	break;
	252	case 'e':
4991f6ca	253	case 'c':
f366ad31 AS	254	{
	255	struct cmd_rec *cr;
	256	cr = XMALLOC(0, sizeof(*cr));
	257	cr->line = optarg;
	258	cr->next = NULL;
	259	if (tail)
	260	tail->next = cr;
	261	else
	262	cmd = cr;
	263	tail = cr;
	264	}
	265	break;
	266	case 'd':
	267	daemon_name = optarg;
	268	break;
914131f8 SH	269	case 'n':
	270	no_error = 1;
	271	break;
f366ad31 AS	272	case 'E':
f366ad31 AS	273	echo_command = 1;
718e3744	274	break;
876b8be0 PJ	275	case 'C':
	276	dryrun = 1;
	277	break;
718e3744	278	case 'h':
	279	usage (0);
	280	break;
718e3744	281	default:
	282	usage (1);
	283	break;
	284	}
	285	}
	286
	287	/* Initialize user input buffer. */
	288	line_read = NULL;
0fbd62a1	289	setlinebuf(stdout);
718e3744	290
718e3744	291	/* Signal and others. */
e42f5a37	292	vtysh_signal_init ();
718e3744	293
	294	/* Make vty structure and register commands. */
	295	vtysh_init_vty ();
	296	vtysh_init_cmd ();
	297	vtysh_user_init ();
	298	vtysh_config_init ();
	299
	300	vty_init_vtysh ();
	301
f366ad31	302	/* Read vtysh configuration file before connecting to daemons. */
e7168df4	303	vtysh_read_config (config_default);
718e3744	304
876b8be0 PJ	305	/* Start execution only if not in dry-run mode */
	306	if(dryrun)
	307	return(0);
	308
914131f8 SH	309	/* Ignore error messages */
	310	if (no_error)
	311	freopen("/dev/null", "w", stdout);
	312
f366ad31 AS	313	/* Make sure we pass authentication before proceeding. */
	314	vtysh_auth ();
	315
	316	/* Do not connect until we have passed authentication. */
	317	if (vtysh_connect_all (daemon_name) <= 0)
	318	{
	319	fprintf(stderr, "Exiting: failed to connect to any daemons.\n");
	320	exit(1);
	321	}
	322
95e735b5	323	/* If eval mode. */
f366ad31	324	if (cmd)
718e3744	325	{
f366ad31 AS	326	/* Enter into enable node. */
	327	vtysh_execute ("enable");
	328
	329	while (cmd != NULL)
	330	{
57fb9748	331	int ret;
f366ad31 AS	332	char *eol;
	333
	334	while ((eol = strchr(cmd->line, '\n')) != NULL)
	335	{
	336	*eol = '\0';
57fb9748	337
f366ad31	338	if (echo_command)
57fb9748 SH	339	printf("%s%s\n", vtysh_prompt(), cmd->line);
	340
	341	if (logfile)
	342	log_it(cmd->line);
	343
	344	ret = vtysh_execute_no_pager(cmd->line);
914131f8 SH	345	if (!no_error &&
	346	! (ret == CMD_SUCCESS \|\|
	347	ret == CMD_SUCCESS_DAEMON \|\|
	348	ret == CMD_WARNING))
57fb9748 SH	349	exit(1);
57fb9748 SH	350
f366ad31 AS	351	cmd->line = eol+1;
f366ad31 AS	352	}
57fb9748	353
f366ad31 AS	354	if (echo_command)
f366ad31 AS	355	printf("%s%s\n", vtysh_prompt(), cmd->line);
57fb9748 SH	356
	357	if (logfile)
	358	log_it(cmd->line);
	359
	360	ret = vtysh_execute_no_pager(cmd->line);
914131f8 SH	361	if (!no_error &&
	362	! (ret == CMD_SUCCESS \|\|
	363	ret == CMD_SUCCESS_DAEMON \|\|
	364	ret == CMD_WARNING))
57fb9748	365	exit(1);
f366ad31 AS	366
	367	{
	368	struct cmd_rec *cr;
	369	cr = cmd;
	370	cmd = cmd->next;
	371	XFREE(0, cr);
	372	}
	373	}
718e3744	374	exit (0);
	375	}
	376
	377	/* Boot startup configuration file. */
	378	if (boot_flag)
	379	{
e7168df4	380	if (vtysh_read_config (integrate_default))
	381	{
	382	fprintf (stderr, "Can't open configuration file [%s]\n",
	383	integrate_default);
	384	exit (1);
	385	}
	386	else
	387	exit (0);
718e3744	388	}
	389
	390	vtysh_pager_init ();
	391
	392	vtysh_readline_init ();
	393
	394	vty_hello (vty);
	395
e7168df4	396	/* Enter into enable node. */
	397	vtysh_execute ("enable");
	398
718e3744	399	/* Preparation for longjmp() in sigtstp(). */
	400	sigsetjmp (jmpbuf, 1);
	401	jmpflag = 1;
	402
3f4ab7f9 TP	403	snprintf(history_file, sizeof(history_file), "%s/.history_quagga", getenv("HOME"));
3f4ab7f9 TP	404	read_history(history_file);
718e3744	405	/* Main command loop. */
	406	while (vtysh_rl_gets ())
	407	vtysh_execute (line_read);
	408
3f4ab7f9	409	history_truncate_file(history_file,1000);
718e3744	410	printf ("\n");
	411
	412	/* Rest in peace. */
	413	exit (0);
	414	}