frr/vtysh/vtysh.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 this program; see the file COPYING; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <zebra.h>

#include <sys/un.h>
#include <setjmp.h>
#include <sys/wait.h>
#include <sys/resource.h>
#include <sys/stat.h>

/* readline carries some ancient definitions around */
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wstrict-prototypes"
#include <readline/readline.h>
#include <readline/history.h>
#pragma GCC diagnostic pop

#include <dirent.h>
#include <stdio.h>
#include <string.h>

#include "linklist.h"
#include "command.h"
#include "memory.h"
#include "filter.h"
#include "vtysh/vtysh.h"
#include "vtysh/vtysh_daemons.h"
#include "log.h"
#include "vrf.h"
#include "libfrr.h"
#include "command_graph.h"
#include "frrstr.h"
#include "json.h"
#include "ferr.h"

DEFINE_MTYPE_STATIC(MVTYSH, VTYSH_CMD, "Vtysh cmd copy");

/* Struct VTY. */
struct vty *vty;

/* VTY shell pager name. */
char *vtysh_pager_name = NULL;

/* VTY should add timestamp */
bool vtysh_add_timestamp;

/* VTY shell client structure */
struct vtysh_client {
	int fd;
	const char *name;
	int flag;
	char path[MAXPATHLEN];
	struct vtysh_client *next;
};

/* Some utility functions for working on vtysh-specific vty tasks */

static FILE *vty_open_pager(struct vty *vty)
{
	if (vty->is_paged)
		return vty->of;

	if (!vtysh_pager_name)
		return NULL;

	vty->of_saved = vty->of;
	vty->of = popen(vtysh_pager_name, "w");
	if (vty->of == NULL) {
		vty->of = vty->of_saved;
		perror("popen");
		exit(1);
	}

	vty->is_paged = true;

	return vty->of;
}

static int vty_close_pager(struct vty *vty)
{
	if (!vty->is_paged)
		return 0;

	fflush(vty->of);
	if (pclose(vty->of) == -1) {
		perror("pclose");
		exit(1);
	}

	vty->of = vty->of_saved;
	vty->is_paged = false;

	return 0;
}

static void vtysh_pager_envdef(bool fallback)
{
	char *pager_defined;

	pager_defined = getenv("VTYSH_PAGER");

	if (pager_defined)
		vtysh_pager_name = strdup(pager_defined);
	else if (fallback)
		vtysh_pager_name = strdup(VTYSH_PAGER);
}

/* --- */

struct vtysh_client vtysh_client[] = {
	{.fd = -1, .name = "zebra", .flag = VTYSH_ZEBRA, .next = NULL},
	{.fd = -1, .name = "ripd", .flag = VTYSH_RIPD, .next = NULL},
	{.fd = -1, .name = "ripngd", .flag = VTYSH_RIPNGD, .next = NULL},
	{.fd = -1, .name = "ospfd", .flag = VTYSH_OSPFD, .next = NULL},
	{.fd = -1, .name = "ospf6d", .flag = VTYSH_OSPF6D, .next = NULL},
	{.fd = -1, .name = "ldpd", .flag = VTYSH_LDPD, .next = NULL},
	{.fd = -1, .name = "bgpd", .flag = VTYSH_BGPD, .next = NULL},
	{.fd = -1, .name = "isisd", .flag = VTYSH_ISISD, .next = NULL},
	{.fd = -1, .name = "pimd", .flag = VTYSH_PIMD, .next = NULL},
	{.fd = -1, .name = "nhrpd", .flag = VTYSH_NHRPD, .next = NULL},
	{.fd = -1, .name = "eigrpd", .flag = VTYSH_EIGRPD, .next = NULL},
	{.fd = -1, .name = "babeld", .flag = VTYSH_BABELD, .next = NULL},
	{.fd = -1, .name = "sharpd", .flag = VTYSH_SHARPD, .next = NULL},
	{.fd = -1, .name = "fabricd", .flag = VTYSH_FABRICD, .next = NULL},
	{.fd = -1, .name = "watchfrr", .flag = VTYSH_WATCHFRR, .next = NULL},
	{.fd = -1, .name = "pbrd", .flag = VTYSH_PBRD, .next = NULL},
	{.fd = -1, .name = "staticd", .flag = VTYSH_STATICD, .next = NULL},
	{.fd = -1, .name = "bfdd", .flag = VTYSH_BFDD, .next = NULL},
	{.fd = -1, .name = "vrrpd", .flag = VTYSH_VRRPD, .next = NULL},
	{.fd = -1, .name = "pathd", .flag = VTYSH_PATHD, .next = NULL},
	{.fd = -1, .name = "pim6d", .flag = VTYSH_PIM6D, .next = NULL},
};

/* Searches for client by name, returns index */
static int vtysh_client_lookup(const char *name)
{
	int idx = -1;

	for (unsigned int i = 0; i < array_size(vtysh_client); i++) {
		if (strmatch(vtysh_client[i].name, name)) {
			idx = i;
			break;
		}
	}

	return idx;
}

enum vtysh_write_integrated vtysh_write_integrated =
	WRITE_INTEGRATED_UNSPECIFIED;

static int vtysh_reconnect(struct vtysh_client *vclient);

static void vclient_close(struct vtysh_client *vclient)
{
	if (vclient->fd >= 0) {
		if (vty->of)
			vty_out(vty,
				"Warning: closing connection to %s because of an I/O error!\n",
				vclient->name);
		close(vclient->fd);
		/* indicate as candidate for reconnect */
		vclient->fd = VTYSH_WAS_ACTIVE;
	}
}

/*
 * Send a CLI command to a client and read the response.
 *
 * Output will be printed to vty->of. If you want to suppress output, set that
 * to NULL.
 *
 * vclient
 *    the client to send the command to
 *
 * line
 *    the command to send
 *
 * callback
 *    if non-null, this will be called with each line of output received from
 *    the client passed in the second parameter
 *
 * cbarg
 *    optional first argument to pass to callback
 *
 * Returns:
 *    a status code
 */
static int vtysh_client_run(struct vtysh_client *vclient, const char *line,
			    void (*callback)(void *, const char *), void *cbarg)
{
	int ret;
	char stackbuf[4096];
	char *buf = stackbuf;
	size_t bufsz = sizeof(stackbuf);
	char *bufvalid, *end = NULL;
	char terminator[3] = {0, 0, 0};

	/* vclinet was previously active, try to reconnect */
	if (vclient->fd == VTYSH_WAS_ACTIVE) {
		ret = vtysh_reconnect(vclient);
		if (ret < 0)
			goto out_err;
	}

	if (vclient->fd < 0)
		return CMD_SUCCESS;

	ret = write(vclient->fd, line, strlen(line) + 1);
	if (ret <= 0) {
		/* close connection and try to reconnect */
		vclient_close(vclient);
		ret = vtysh_reconnect(vclient);
		if (ret < 0)
			goto out_err;
		/* retry line */
		ret = write(vclient->fd, line, strlen(line) + 1);
		if (ret <= 0)
			goto out_err;
	}

	bufvalid = buf;
	do {
		ssize_t nread =
			read(vclient->fd, bufvalid, buf + bufsz - bufvalid - 1);

		if (nread < 0 && (errno == EINTR || errno == EAGAIN))
			continue;

		if (nread <= 0) {
			if (vty->of)
				vty_out(vty,
					"vtysh: error reading from %s: %s (%d)",
					vclient->name, safe_strerror(errno),
					errno);
			goto out_err;
		}

		bufvalid += nread;

		/* Null terminate so we may pass this to *printf later. */
		bufvalid[0] = '\0';

		/*
		 * We expect string output from daemons, so instead of looking
		 * for the full 3 null bytes of the terminator, we check for
		 * just one instead and assume it is the first byte of the
		 * terminator. The presence of the full terminator is checked
		 * later.
		 */
		if (bufvalid - buf >= 4)
			end = memmem(bufvalid - 4, 4, "\0", 1);

		/*
		 * calculate # bytes we have, up to & not including the
		 * terminator if present
		 */
		size_t textlen = (end ? end : bufvalid) - buf;
		bool b = false;

		/* feed line processing callback if present */
		while (callback && bufvalid > buf && (end > buf || !end)) {
			textlen = (end ? end : bufvalid) - buf;
			char *eol = memchr(buf, '\n', textlen);
			if (eol)
				/* line break */
				*eol++ = '\0';
			else if (end == buf)
				/*
				 * no line break, end of input, no text left
				 * before end; nothing to write
				 */
				b = true;
			else if (end)
				/* no nl, end of input, but some text left */
				eol = end;
			else if (bufvalid == buf + bufsz - 1) {
				/*
				 * no nl, no end of input, no buffer space;
				 * realloc
				 */
				char *new;

				bufsz *= 2;
				if (buf == stackbuf) {
					new = XMALLOC(MTYPE_TMP, bufsz);
					memcpy(new, stackbuf, sizeof(stackbuf));
				} else
					new = XREALLOC(MTYPE_TMP, buf, bufsz);

				bufvalid = bufvalid - buf + new;
				buf = new;
				/* if end != NULL, we won't be reading more
				 * data... */
				assert(end == NULL);
				b = true;
			} else
				b = true;

			if (b)
				break;

			/* eol is at line end now, either \n => \0 or \0\0\0 */
			assert(eol && eol <= bufvalid);

			if (vty->of)
				vty_out(vty, "%s\n", buf);

			callback(cbarg, buf);

			/* shift back data and adjust bufvalid */
			memmove(buf, eol, bufvalid - eol);
			bufvalid -= eol - buf;
			if (end)
				end -= eol - buf;
		}

		/* else if no callback, dump raw */
		if (!callback) {
			if (vty->of)
				vty_out(vty, "%s", buf);
			memmove(buf, buf + textlen, bufvalid - buf - textlen);
			bufvalid -= textlen;
			if (end)
				end -= textlen;

			/*
			 * ----------------------------------------------------
			 * At this point `buf` should be in one of two states:
			 * - Empty (i.e. buf == bufvalid)
			 * - Contains up to 4 bytes of the terminator
			 * ----------------------------------------------------
			 */
			assert(((buf == bufvalid)
				|| (bufvalid - buf <= 4 && buf[0] == 0x00)));
		}

		/* if we have the terminator, break */
		if (end && bufvalid - buf == 4) {
			assert(!memcmp(buf, terminator, 3));
			ret = buf[3];
			break;
		}

	} while (true);
	goto out;

out_err:
	vclient_close(vclient);
	ret = CMD_SUCCESS;
out:
	if (buf != stackbuf)
		XFREE(MTYPE_TMP, buf);
	return ret;
}

static int vtysh_client_run_all(struct vtysh_client *head_client,
				const char *line, int continue_on_err,
				void (*callback)(void *, const char *),
				void *cbarg)
{
	struct vtysh_client *client;
	int rc, rc_all = CMD_SUCCESS;
	int correct_instance = 0, wrong_instance = 0;

	for (client = head_client; client; client = client->next) {
		rc = vtysh_client_run(client, line, callback, cbarg);
		if (rc == CMD_NOT_MY_INSTANCE) {
			wrong_instance++;
			continue;
		}
		if (client->fd > 0)
			correct_instance++;
		if (rc != CMD_SUCCESS) {
			if (!continue_on_err)
				return rc;
			rc_all = rc;
		}
	}
	if (wrong_instance && !correct_instance && vty->of) {
		vty_out(vty,
			"%% [%s]: command ignored as it targets an instance that is not running\n",
			head_client->name);
		rc_all = CMD_WARNING_CONFIG_FAILED;
	}
	return rc_all;
}

/*
 * Execute command against all daemons.
 *
 * head_client
 *    where to start walking in the daemon list
 *
 * line
 *    the specific command to execute
 *
 * Returns:
 *    a status code
 */
static int vtysh_client_execute(struct vtysh_client *head_client,
				const char *line)
{
	return vtysh_client_run_all(head_client, line, 0, NULL, NULL);
}

/* Execute by name */
static int vtysh_client_execute_name(const char *name, const char *line)
{
	int ret = CMD_SUCCESS;
	int idx_client = -1;

	idx_client = vtysh_client_lookup(name);
	if (idx_client != -1)
		ret = vtysh_client_execute(&vtysh_client[idx_client], line);
	else {
		vty_out(vty, "Client not found\n");
		ret = CMD_WARNING;
	}

	return ret;
}

/*
 * Retrieve all running config from daemons and parse it with the vtysh config
 * parser. Returned output is not displayed to the user.
 *
 * head_client
 *    where to start walking in the daemon list
 *
 * line
 *    the specific command to execute
 */
static void vtysh_client_config(struct vtysh_client *head_client, char *line)
{
	/* watchfrr currently doesn't load any config, and has some hardcoded
	 * settings that show up in "show run".  skip it here (for now at
	 * least) so we don't get that mangled up in config-write.
	 */
	if (head_client->flag == VTYSH_WATCHFRR)
		return;

	/* suppress output to user */
	vty->of_saved = vty->of;
	vty->of = NULL;
	vtysh_client_run_all(head_client, line, 1, vtysh_config_parse_line,
			     NULL);
	vty->of = vty->of_saved;
}

/* Command execution over the vty interface. */
static int vtysh_execute_func(const char *line, int pager)
{
	int ret, cmd_stat;
	unsigned int i;
	vector vline;
	const struct cmd_element *cmd;
	int tried = 0;
	int saved_ret, saved_node;

	/* Split readline string up into the vector. */
	vline = cmd_make_strvec(line);

	if (vline == NULL)
		return CMD_SUCCESS;

	if (vtysh_add_timestamp && strncmp(line, "exit", 4)) {
		char ts[48];

		(void)frr_timestamp(3, ts, sizeof(ts));
		vty_out(vty, "%% %s\n\n", ts);
	}

	saved_ret = ret = cmd_execute(vty, line, &cmd, 1);
	saved_node = vty->node;

	/*
	 * If command doesn't succeeded in current node, try to walk up in node
	 * tree. Changing vty->node is enough to try it just out without actual
	 * walkup in the vtysh.
	 */
	while (ret != CMD_SUCCESS && ret != CMD_SUCCESS_DAEMON
	       && ret != CMD_WARNING && ret != CMD_WARNING_CONFIG_FAILED
	       && ret != CMD_ERR_AMBIGUOUS && ret != CMD_ERR_INCOMPLETE
	       && vty->node > CONFIG_NODE) {
		vty->node = node_parent(vty->node);
		ret = cmd_execute(vty, line, &cmd, 1);
		tried++;
	}

	vty->node = saved_node;

	/*
	 * If command succeeded in any other node than current (tried > 0) we
	 * have to move into node in the vtysh where it succeeded.
	 */
	if (ret == CMD_SUCCESS || ret == CMD_SUCCESS_DAEMON
	    || ret == CMD_WARNING) {
		while (tried-- > 0)
			vtysh_execute("exit");
	}
	/*
	 * If command didn't succeed in any node, continue with return value
	 * from first try.
	 */
	else if (tried) {
		ret = saved_ret;
	}

	cmd_free_strvec(vline);

	cmd_stat = ret;
	switch (ret) {
	case CMD_WARNING:
	case CMD_WARNING_CONFIG_FAILED:
		if (vty->type == VTY_FILE)
			vty_out(vty, "Warning...\n");
		break;
	case CMD_ERR_AMBIGUOUS:
		vty_out(vty, "%% Ambiguous command: %s\n", line);
		break;
	case CMD_ERR_NO_MATCH:
		vty_out(vty, "%% Unknown command: %s\n", line);
		break;
	case CMD_ERR_INCOMPLETE:
		vty_out(vty, "%% Command incomplete: %s\n", line);
		break;
	case CMD_SUCCESS_DAEMON: {
		/*
		 * FIXME: Don't open pager for exit commands. popen() causes
		 * problems if exited from vtysh at all. This hack shouldn't
		 * cause any problem but is really ugly.
		 */
		if (pager && strncmp(line, "exit", 4))
			vty_open_pager(vty);

		if (!strcmp(cmd->string, "configure")) {
			for (i = 0; i < array_size(vtysh_client); i++) {
				cmd_stat = vtysh_client_execute(
					&vtysh_client[i], line);
				if (cmd_stat == CMD_WARNING)
					break;
			}

			if (cmd_stat) {
				line = "end";
				vline = cmd_make_strvec(line);


				if (vline == NULL) {
					if (vty->is_paged)
						vty_close_pager(vty);
					return CMD_SUCCESS;
				}

				ret = cmd_execute_command(vline, vty, &cmd, 1);
				cmd_free_strvec(vline);
				if (ret != CMD_SUCCESS_DAEMON)
					break;
			} else if (cmd->func) {
				(*cmd->func)(cmd, vty, 0, NULL);
				break;
			}
		}

		cmd_stat = CMD_SUCCESS;
		struct vtysh_client *vc;
		for (i = 0; i < array_size(vtysh_client); i++) {
			if (cmd->daemon & vtysh_client[i].flag) {
				if (vtysh_client[i].fd < 0
				    && (cmd->daemon == vtysh_client[i].flag)) {
					for (vc = &vtysh_client[i]; vc;
					     vc = vc->next)
						if (vc->fd == VTYSH_WAS_ACTIVE)
							vtysh_reconnect(vc);
				}
				if (vtysh_client[i].fd < 0
				    && (cmd->daemon == vtysh_client[i].flag)) {
					bool any_inst = false;
					for (vc = &vtysh_client[i]; vc;
					     vc = vc->next)
						any_inst = any_inst
							   || (vc->fd > 0);
					if (!any_inst) {
						fprintf(stderr,
							"%s is not running\n",
							vtysh_client[i].name);
						cmd_stat = CMD_ERR_NO_DAEMON;
						break;
					}
				}
				cmd_stat = vtysh_client_execute(
					&vtysh_client[i], line);
				if (cmd_stat != CMD_SUCCESS)
					break;
			}
		}
		if (cmd_stat != CMD_SUCCESS && cmd_stat != CMD_ERR_NO_DAEMON)
			break;

		if (cmd->func)
			(*cmd->func)(cmd, vty, 0, NULL);
	}
	}
	if (vty->is_paged)
		vty_close_pager(vty);

	return cmd_stat;
}

int vtysh_execute_no_pager(const char *line)
{
	return vtysh_execute_func(line, 0);
}

int vtysh_execute(const char *line)
{
	return vtysh_execute_func(line, 1);
}

static char *trim(char *s)
{
	size_t size;
	char *end;

	size = strlen(s);

	if (!size)
		return s;

	end = s + size - 1;
	while (end >= s && isspace((unsigned char)*end))
		end--;
	*(end + 1) = '\0';

	while (*s && isspace((unsigned char)*s))
		s++;

	return s;
}

int vtysh_mark_file(const char *filename)
{
	struct vty *vty;
	FILE *confp = NULL;
	int ret;
	vector vline;
	int tried = 0;
	const struct cmd_element *cmd;
	int saved_ret, prev_node;
	int lineno = 0;
	char *vty_buf_copy = NULL;
	char *vty_buf_trimmed = NULL;

	if (strncmp("-", filename, 1) == 0)
		confp = stdin;
	else
		confp = fopen(filename, "r");

	if (confp == NULL) {
		fprintf(stderr, "%% Can't open config file %s due to '%s'.\n",
			filename, safe_strerror(errno));
		return CMD_ERR_NO_FILE;
	}

	vty = vty_new();
	vty->wfd = STDOUT_FILENO;
	vty->type = VTY_TERM;
	vty->node = CONFIG_NODE;

	vtysh_execute_no_pager("enable");
	vtysh_execute_no_pager("configure");
	vty_buf_copy = XCALLOC(MTYPE_VTYSH_CMD, VTY_BUFSIZ);

	while (fgets(vty->buf, VTY_BUFSIZ, confp)) {
		lineno++;
		tried = 0;
		strlcpy(vty_buf_copy, vty->buf, VTY_BUFSIZ);
		vty_buf_trimmed = trim(vty_buf_copy);

		if (vty_buf_trimmed[0] == '!' || vty_buf_trimmed[0] == '#') {
			vty_out(vty, "%s", vty->buf);
			continue;
		}

		/* Split readline string up into the vector. */
		vline = cmd_make_strvec(vty->buf);

		if (vline == NULL) {
			vty_out(vty, "%s", vty->buf);
			continue;
		}

		/*
		 * Ignore the "end" lines, we will generate these where
		 * appropriate
		 */
		if (strlen(vty_buf_trimmed) == 3
		    && strncmp("end", vty_buf_trimmed, 3) == 0) {
			cmd_free_strvec(vline);
			continue;
		}

		prev_node = vty->node;
		saved_ret = ret = cmd_execute_command_strict(vline, vty, &cmd);

		/*
		 * If command doesn't succeeded in current node, try to walk up
		 * in node tree. Changing vty->node is enough to try it just
		 * out without actual walkup in the vtysh.
		 */
		while (ret != CMD_SUCCESS && ret != CMD_SUCCESS_DAEMON
		       && ret != CMD_WARNING && ret != CMD_WARNING_CONFIG_FAILED
		       && ret != CMD_ERR_AMBIGUOUS && ret != CMD_ERR_INCOMPLETE
		       && vty->node > CONFIG_NODE) {
			vty->node = node_parent(vty->node);
			ret = cmd_execute_command_strict(vline, vty, &cmd);
			tried++;
		}

		/*
		 * If command succeeded in any other node than current (tried >
		 * 0) we have to move into node in the vtysh where it
		 * succeeded.
		 */
		if (ret == CMD_SUCCESS || ret == CMD_SUCCESS_DAEMON
		    || ret == CMD_WARNING) {
			while (tried-- > 0)
				vty_out(vty, "exit\n");
		}
		/*
		 * If command didn't succeed in any node, continue with return
		 * value from first try.
		 */
		else if (tried) {
			ret = saved_ret;
			vty->node = prev_node;
		}

		cmd_free_strvec(vline);
		switch (ret) {
		case CMD_WARNING:
		case CMD_WARNING_CONFIG_FAILED:
			if (vty->type == VTY_FILE)
				fprintf(stderr, "line %d: Warning...: %s\n",
					lineno, vty->buf);
			fclose(confp);
			vty_close(vty);
			XFREE(MTYPE_VTYSH_CMD, vty_buf_copy);
			return ret;
		case CMD_ERR_AMBIGUOUS:
			fprintf(stderr, "line %d: %% Ambiguous command: %s\n",
				lineno, vty->buf);
			fclose(confp);
			vty_close(vty);
			XFREE(MTYPE_VTYSH_CMD, vty_buf_copy);
			return CMD_ERR_AMBIGUOUS;
		case CMD_ERR_NO_MATCH:
			fprintf(stderr, "line %d: %% Unknown command: %s\n",
				lineno, vty->buf);
			fclose(confp);
			vty_close(vty);
			XFREE(MTYPE_VTYSH_CMD, vty_buf_copy);
			return CMD_ERR_NO_MATCH;
		case CMD_ERR_INCOMPLETE:
			fprintf(stderr, "line %d: %% Command incomplete: %s\n",
				lineno, vty->buf);
			fclose(confp);
			vty_close(vty);
			XFREE(MTYPE_VTYSH_CMD, vty_buf_copy);
			return CMD_ERR_INCOMPLETE;
		case CMD_SUCCESS:
			vty_out(vty, "%s", vty->buf);
			if (strmatch(vty_buf_trimmed, "exit-vrf"))
				vty_out(vty, "end\n");
			break;
		case CMD_SUCCESS_DAEMON: {
			int cmd_stat;

			vty_out(vty, "%s", vty->buf);
			if (strmatch(vty_buf_trimmed, "exit-vrf"))
				vty_out(vty, "end\n");
			cmd_stat = vtysh_client_execute(&vtysh_client[0],
							vty->buf);
			if (cmd_stat != CMD_SUCCESS)
				break;

			if (cmd->func)
				(*cmd->func)(cmd, vty, 0, NULL);
		}
		}
	}
	/* This is the end */
	vty_out(vty, "\nend\n");
	vty_close(vty);
	XFREE(MTYPE_VTYSH_CMD, vty_buf_copy);

	if (confp != stdin)
		fclose(confp);

	return 0;
}

/* Configuration make from file. */
int vtysh_config_from_file(struct vty *vty, FILE *fp)
{
	int ret;
	const struct cmd_element *cmd;
	int lineno = 0;
	/* once we have an error, we remember & return that */
	int retcode = CMD_SUCCESS;

	while (fgets(vty->buf, VTY_BUFSIZ, fp)) {
		lineno++;

		ret = command_config_read_one_line(vty, &cmd, lineno, 1);

		switch (ret) {
		case CMD_WARNING:
		case CMD_WARNING_CONFIG_FAILED:
			if (vty->type == VTY_FILE)
				fprintf(stderr, "line %d: Warning[%d]...: %s\n",
					lineno, vty->node, vty->buf);
			retcode = ret;

			break;
		case CMD_ERR_AMBIGUOUS:
			fprintf(stderr,
				"line %d: %% Ambiguous command[%d]: %s\n",
				lineno, vty->node, vty->buf);
			retcode = CMD_ERR_AMBIGUOUS;
			break;
		case CMD_ERR_NO_MATCH:
			fprintf(stderr, "line %d: %% Unknown command[%d]: %s",
				lineno, vty->node, vty->buf);
			retcode = CMD_ERR_NO_MATCH;
			break;
		case CMD_ERR_INCOMPLETE:
			fprintf(stderr,
				"line %d: %% Command incomplete[%d]: %s\n",
				lineno, vty->node, vty->buf);
			retcode = CMD_ERR_INCOMPLETE;
			break;
		case CMD_SUCCESS_DAEMON: {
			unsigned int i;
			int cmd_stat = CMD_SUCCESS;

			for (i = 0; i < array_size(vtysh_client); i++) {
				if (cmd->daemon & vtysh_client[i].flag) {
					cmd_stat = vtysh_client_execute(
						&vtysh_client[i], vty->buf);
					/*
					 * CMD_WARNING - Can mean that the
					 * command was parsed successfully but
					 * it was already entered in a few
					 * spots. As such if we receive a
					 * CMD_WARNING from a daemon we
					 * shouldn't stop talking to the other
					 * daemons for the particular command.
					 */
					if (cmd_stat != CMD_SUCCESS
					    && cmd_stat != CMD_WARNING) {
						fprintf(stderr,
							"line %d: Failure to communicate[%d] to %s, line: %s\n",
							lineno, cmd_stat,
							vtysh_client[i].name,
							vty->buf);
						retcode = cmd_stat;
						break;
					}
				}
			}
			if (cmd_stat != CMD_SUCCESS)
				break;

			if (cmd->func)
				(*cmd->func)(cmd, vty, 0, NULL);
		}
		}
	}

	return (retcode);
}

/*
 * Function processes cli commands terminated with '?' character when entered
 * through either 'vtysh' or 'vtysh -c' interfaces.
 */
static int vtysh_process_questionmark(const char *input, int input_len)
{
	int ret, width = 0;
	unsigned int i;
	vector vline, describe;
	struct cmd_token *token;

	if (!input)
		return 1;

	vline = cmd_make_strvec(input);

	/* In case of '> ?'. */
	if (vline == NULL) {
		vline = vector_init(1);
		vector_set(vline, NULL);
	} else if (input_len && isspace((unsigned char)input[input_len - 1]))
		vector_set(vline, NULL);

	describe = cmd_describe_command(vline, vty, &ret);

	/* Ambiguous and no match error. */
	switch (ret) {
	case CMD_ERR_AMBIGUOUS:
		cmd_free_strvec(vline);
		vector_free(describe);
		vty_out(vty, "%% Ambiguous command.\n");
		rl_on_new_line();
		return 0;
	case CMD_ERR_NO_MATCH:
		cmd_free_strvec(vline);
		if (describe)
			vector_free(describe);
		vty_out(vty, "%% There is no matched command.\n");
		rl_on_new_line();
		return 0;
	}

	/* Get width of command string. */
	width = 0;
	for (i = 0; i < vector_active(describe); i++)
		if ((token = vector_slot(describe, i)) != NULL) {
			if (token->text[0] == '\0')
				continue;

			int len = strlen(token->text);

			if (width < len)
				width = len;
		}

	for (i = 0; i < vector_active(describe); i++)
		if ((token = vector_slot(describe, i)) != NULL) {
			if (!token->desc)
				vty_out(vty, "  %-s\n", token->text);
			else
				vty_out(vty, "  %-*s  %s\n", width, token->text,
					token->desc);

			if (IS_VARYING_TOKEN(token->type)) {
				const char *ref = vector_slot(
					vline, vector_active(vline) - 1);

				vector varcomps = vector_init(VECTOR_MIN_SIZE);
				cmd_variable_complete(token, ref, varcomps);

				if (vector_active(varcomps) > 0) {
					int rows, cols;
					rl_get_screen_size(&rows, &cols);

					char *ac = cmd_variable_comp2str(
						varcomps, cols);
					vty_out(vty, "%s\n", ac);
					XFREE(MTYPE_TMP, ac);
				}

				vector_free(varcomps);
			}
		}

	cmd_free_strvec(vline);
	vector_free(describe);

	return 0;
}

/*
 * Entry point for user commands terminated with '?' character and typed through
 * the usual vtysh's stdin interface. This is the function being registered with
 * readline() api's.
 */
static int vtysh_rl_describe(int a, int b)
{
	int ret;

	vty_out(vty, "\n");

	ret = vtysh_process_questionmark(rl_line_buffer, rl_end);
	rl_on_new_line();

	return ret;
}

/*
 * Function in charged of processing vtysh instructions terminating with '?'
 * character and received through the 'vtysh -c' interface. If user's
 * instruction is well-formatted, we will call the same processing routine
 * utilized by the traditional vtysh's stdin interface.
 */
int vtysh_execute_command_questionmark(char *input)
{
	int input_len, qmark_count = 0;
	const char *str;

	if (!(input && *input))
		return 1;

	/* Finding out question_mark count and strlen */
	for (str = input; *str; ++str) {
		if (*str == '?')
			qmark_count++;
	}
	input_len = str - input;

	/*
	 * Verify that user's input terminates in '?' and that patterns such as
	 * 'cmd ? subcmd ?' are prevented.
	 */
	if (qmark_count != 1 || input[input_len - 1] != '?')
		return 1;

	/*
	 * Questionmark-processing function is not expecting to receive '?'
	 * character in input string.
	 */
	input[input_len - 1] = '\0';

	return vtysh_process_questionmark(input, input_len - 1);
}

/* Result of cmd_complete_command() call will be stored here
 * and used in new_completion() in order to put the space in
 * correct places only. */
int complete_status;

static char *command_generator(const char *text, int state)
{
	vector vline;
	static char **matched = NULL;
	static int index = 0;

	/* First call. */
	if (!state) {
		index = 0;

		if (vty->node == AUTH_NODE || vty->node == AUTH_ENABLE_NODE)
			return NULL;

		vline = cmd_make_strvec(rl_line_buffer);
		if (vline == NULL)
			return NULL;

		if (rl_end &&
		    isspace((unsigned char)rl_line_buffer[rl_end - 1]))
			vector_set(vline, NULL);

		matched = cmd_complete_command(vline, vty, &complete_status);
		cmd_free_strvec(vline);
	}

	if (matched && matched[index]) {
		XCOUNTFREE(MTYPE_COMPLETION, matched[index]);
		return matched[index++];
	}

	XFREE(MTYPE_TMP, matched);

	return NULL;
}

static char **new_completion(const char *text, int start, int end)
{
	char **matches;

	matches = rl_completion_matches(text, command_generator);

	if (matches) {
		rl_point = rl_end;
		if (complete_status != CMD_COMPLETE_FULL_MATCH)
			/* only append a space on full match */
			rl_completion_append_character = '\0';
	}

	return matches;
}

/* Vty node structures. */
#ifdef HAVE_BGPD
static struct cmd_node bgp_node = {
	.name = "bgp",
	.node = BGP_NODE,
	.parent_node = CONFIG_NODE,
	.prompt = "%s(config-router)# ",
};
#endif /* HAVE_BGPD */

static struct cmd_node rip_node = {
	.name = "rip",
	.node = RIP_NODE,
	.parent_node = CONFIG_NODE,
	.prompt = "%s(config-router)# ",
};

#ifdef HAVE_ISISD
static struct cmd_node isis_node = {
	.name = "isis",
	.node = ISIS_NODE,
	.parent_node = CONFIG_NODE,
	.prompt = "%s(config-router)# ",
};
#endif /* HAVE_ISISD */

#ifdef HAVE_FABRICD
static struct cmd_node openfabric_node = {
	.name = "openfabric",
	.node = OPENFABRIC_NODE,
	.parent_node = CONFIG_NODE,
	.prompt = "%s(config-router)# ",
};
#endif /* HAVE_FABRICD */

static struct cmd_node interface_node = {
	.name = "interface",
	.node = INTERFACE_NODE,
	.parent_node = CONFIG_NODE,
	.prompt = "%s(config-if)# ",
};

static struct cmd_node pw_node = {
	.name = "pw",
	.node = PW_NODE,
	.parent_node = CONFIG_NODE,
	.prompt = "%s(config-pw)# ",
};

static struct cmd_node segment_routing_node = {
	.name = "segment-routing",
	.node = SEGMENT_ROUTING_NODE,
	.parent_node = CONFIG_NODE,
	.prompt = "%s(config-sr)# ",
};

#if defined(HAVE_PATHD)
static struct cmd_node sr_traffic_eng_node = {
	.name = "sr traffic-eng",
	.node = SR_TRAFFIC_ENG_NODE,
	.parent_node = SEGMENT_ROUTING_NODE,
	.prompt = "%s(config-sr-te)# ",
};

static struct cmd_node srte_segment_list_node = {
	.name = "srte segment-list",
	.node = SR_SEGMENT_LIST_NODE,
	.parent_node = SR_TRAFFIC_ENG_NODE,
	.prompt = "%s(config-sr-te-segment-list)# ",
};

static struct cmd_node srte_policy_node = {
	.name = "srte policy",
	.node = SR_POLICY_NODE,
	.parent_node = SR_TRAFFIC_ENG_NODE,
	.prompt = "%s(config-sr-te-policy)# ",
};

static struct cmd_node srte_candidate_dyn_node = {
	.name = "srte candidate-dyn",
	.node = SR_CANDIDATE_DYN_NODE,
	.parent_node = SR_POLICY_NODE,
	.prompt = "%s(config-sr-te-candidate)# ",
};

static struct cmd_node pcep_node = {
	.name = "srte pcep",
	.node = PCEP_NODE,
	.parent_node = SR_TRAFFIC_ENG_NODE,
	.prompt = "%s(config-sr-te-pcep)# "
};

static struct cmd_node pcep_pcc_node = {
	.name = "srte pcep pcc",
	.node = PCEP_PCC_NODE,
	.parent_node = PCEP_NODE,
	.prompt = "%s(config-sr-te-pcep-pcc)# ",
};

static struct cmd_node pcep_pce_node = {
	.name = "srte pcep pce-peer",
	.node = PCEP_PCE_NODE,
	.parent_node = PCEP_NODE,
	.prompt = "%s(config-sr-te-pcep-pce-peer)# ",
};

static struct cmd_node pcep_pce_config_node = {
	.name = "srte pcep pce-config",
	.node = PCEP_PCE_CONFIG_NODE,
	.parent_node = PCEP_NODE,
	.prompt = "%s(pcep-sr-te-pcep-pce-config)# ",
};
#endif /* HAVE_PATHD */

static struct cmd_node vrf_node = {
	.name = "vrf",
	.node = VRF_NODE,
	.parent_node = CONFIG_NODE,
	.prompt = "%s(config-vrf)# ",
};

static struct cmd_node nh_group_node = {
	.name = "nexthop-group",
	.node = NH_GROUP_NODE,
	.parent_node = CONFIG_NODE,
	.prompt = "%s(config-nh-group)# ",
};

static struct cmd_node rmap_node = {
	.name = "routemap",
	.node = RMAP_NODE,
	.parent_node = CONFIG_NODE,
	.prompt = "%s(config-route-map)# ",
};

static struct cmd_node srv6_node = {
	.name = "srv6",
	.node = SRV6_NODE,
	.parent_node = SEGMENT_ROUTING_NODE,
	.prompt = "%s(config-srv6)# ",
};

static struct cmd_node srv6_locs_node = {
	.name = "srv6-locators",
	.node = SRV6_LOCS_NODE,
	.parent_node = SRV6_NODE,
	.prompt = "%s(config-srv6-locators)# ",
};

static struct cmd_node srv6_loc_node = {
	.name = "srv6-locator",
	.node = SRV6_LOC_NODE,
	.parent_node = SRV6_LOCS_NODE,
	.prompt = "%s(config-srv6-locator)# ",
};

#ifdef HAVE_PBRD
static struct cmd_node pbr_map_node = {
	.name = "pbr-map",
	.node = PBRMAP_NODE,
	.parent_node = CONFIG_NODE,
	.prompt = "%s(config-pbr-map)# ",
};
#endif /* HAVE_PBRD */

static struct cmd_node zebra_node = {
	.name = "zebra",
	.node = ZEBRA_NODE,
	.parent_node = CONFIG_NODE,
	.prompt = "%s(config-router)# ",
};

#ifdef HAVE_BGPD
static struct cmd_node bgp_vpnv4_node = {
	.name = "bgp vpnv4",
	.node = BGP_VPNV4_NODE,
	.parent_node = BGP_NODE,
	.prompt = "%s(config-router-af)# ",
	.no_xpath = true,
};

static struct cmd_node bgp_vpnv6_node = {
	.name = "bgp vpnv6",
	.node = BGP_VPNV6_NODE,
	.parent_node = BGP_NODE,
	.prompt = "%s(config-router-af)# ",
	.no_xpath = true,
};

static struct cmd_node bgp_flowspecv4_node = {
	.name = "bgp ipv4 flowspec",
	.node = BGP_FLOWSPECV4_NODE,
	.parent_node = BGP_NODE,
	.prompt = "%s(config-router-af)# ",
	.no_xpath = true,
};

static struct cmd_node bgp_flowspecv6_node = {
	.name = "bgp ipv6 flowspec",
	.node = BGP_FLOWSPECV6_NODE,
	.parent_node = BGP_NODE,
	.prompt = "%s(config-router-af)# ",
	.no_xpath = true,
};

static struct cmd_node bgp_ipv4_node = {
	.name = "bgp ipv4 unicast",
	.node = BGP_IPV4_NODE,
	.parent_node = BGP_NODE,
	.prompt = "%s(config-router-af)# ",
	.no_xpath = true,
};

static struct cmd_node bgp_ipv4m_node = {
	.name = "bgp ipv4 multicast",
	.node = BGP_IPV4M_NODE,
	.parent_node = BGP_NODE,
	.prompt = "%s(config-router-af)# ",
	.no_xpath = true,
};

static struct cmd_node bgp_ipv4l_node = {
	.name = "bgp ipv4 labeled unicast",
	.node = BGP_IPV4L_NODE,
	.parent_node = BGP_NODE,
	.prompt = "%s(config-router-af)# ",
	.no_xpath = true,
};

static struct cmd_node bgp_ipv6_node = {
	.name = "bgp ipv6",
	.node = BGP_IPV6_NODE,
	.parent_node = BGP_NODE,
	.prompt = "%s(config-router-af)# ",
	.no_xpath = true,
};

static struct cmd_node bgp_ipv6m_node = {
	.name = "bgp ipv6 multicast",
	.node = BGP_IPV6M_NODE,
	.parent_node = BGP_NODE,
	.prompt = "%s(config-router-af)# ",
	.no_xpath = true,
};

static struct cmd_node bgp_evpn_node = {
	.name = "bgp evpn",
	.node = BGP_EVPN_NODE,
	.parent_node = BGP_NODE,
	.prompt = "%s(config-router-af)# ",
	.no_xpath = true,
};

static struct cmd_node bgp_evpn_vni_node = {
	.name = "bgp evpn vni",
	.node = BGP_EVPN_VNI_NODE,
	.parent_node = BGP_EVPN_NODE,
	.prompt = "%s(config-router-af-vni)# ",
};

static struct cmd_node bgp_ipv6l_node = {
	.name = "bgp ipv6 labeled unicast",
	.node = BGP_IPV6L_NODE,
	.parent_node = BGP_NODE,
	.prompt = "%s(config-router-af)# ",
	.no_xpath = true,
};

#ifdef ENABLE_BGP_VNC
static struct cmd_node bgp_vnc_defaults_node = {
	.name = "bgp vnc defaults",
	.node = BGP_VNC_DEFAULTS_NODE,
	.parent_node = BGP_NODE,
	.prompt = "%s(config-router-vnc-defaults)# ",
};

static struct cmd_node bgp_vnc_nve_group_node = {
	.name = "bgp vnc nve",
	.node = BGP_VNC_NVE_GROUP_NODE,
	.parent_node = BGP_NODE,
	.prompt = "%s(config-router-vnc-nve-group)# ",
};

static struct cmd_node bgp_vrf_policy_node = {
	.name = "bgp vrf policy",
	.node = BGP_VRF_POLICY_NODE,
	.parent_node = BGP_NODE,
	.prompt = "%s(config-router-vrf-policy)# ",
};

static struct cmd_node bgp_vnc_l2_group_node = {
	.name = "bgp vnc l2",
	.node = BGP_VNC_L2_GROUP_NODE,
	.parent_node = BGP_NODE,
	.prompt = "%s(config-router-vnc-l2-group)# ",
};
#endif /* ENABLE_BGP_VNC */

static struct cmd_node bmp_node = {
	.name = "bmp",
	.node = BMP_NODE,
	.parent_node = BGP_NODE,
	.prompt = "%s(config-bgp-bmp)# "
};

static struct cmd_node bgp_srv6_node = {
	.name = "bgp srv6",
	.node = BGP_SRV6_NODE,
	.parent_node = BGP_NODE,
	.prompt = "%s(config-router-srv6)# ",
};
#endif /* HAVE_BGPD */

#ifdef HAVE_OSPFD
static struct cmd_node ospf_node = {
	.name = "ospf",
	.node = OSPF_NODE,
	.parent_node = CONFIG_NODE,
	.prompt = "%s(config-router)# ",
};
#endif /* HAVE_OSPFD */

#ifdef HAVE_EIGRPD
static struct cmd_node eigrp_node = {
	.name = "eigrp",
	.node = EIGRP_NODE,
	.parent_node = CONFIG_NODE,
	.prompt = "%s(config-router)# ",
};
#endif /* HAVE_EIGRPD */

#ifdef HAVE_BABELD
static struct cmd_node babel_node = {
	.name = "babel",
	.node = BABEL_NODE,
	.parent_node = CONFIG_NODE,
	.prompt = "%s(config-router)# ",
};
#endif /* HAVE_BABELD */

static struct cmd_node ripng_node = {
	.name = "ripng",
	.node = RIPNG_NODE,
	.parent_node = CONFIG_NODE,
	.prompt = "%s(config-router)# ",
};

#ifdef HAVE_OSPF6D
static struct cmd_node ospf6_node = {
	.name = "ospf6",
	.node = OSPF6_NODE,
	.parent_node = CONFIG_NODE,
	.prompt = "%s(config-ospf6)# ",
};
#endif /* HAVE_OSPF6D */

#ifdef HAVE_LDPD
static struct cmd_node ldp_node = {
	.name = "ldp",
	.node = LDP_NODE,
	.parent_node = CONFIG_NODE,
	.prompt = "%s(config-ldp)# ",
};

static struct cmd_node ldp_ipv4_node = {
	.name = "ldp ipv4",
	.node = LDP_IPV4_NODE,
	.parent_node = LDP_NODE,
	.prompt = "%s(config-ldp-af)# ",
};

static struct cmd_node ldp_ipv6_node = {
	.name = "ldp ipv6",
	.node = LDP_IPV6_NODE,
	.parent_node = LDP_NODE,
	.prompt = "%s(config-ldp-af)# ",
};

static struct cmd_node ldp_ipv4_iface_node = {
	.name = "ldp ipv4 interface",
	.node = LDP_IPV4_IFACE_NODE,
	.parent_node = LDP_IPV4_NODE,
	.prompt = "%s(config-ldp-af-if)# ",
};

static struct cmd_node ldp_ipv6_iface_node = {
	.name = "ldp ipv6 interface",
	.node = LDP_IPV6_IFACE_NODE,
	.parent_node = LDP_IPV6_NODE,
	.prompt = "%s(config-ldp-af-if)# ",
};

static struct cmd_node ldp_l2vpn_node = {
	.name = "ldp l2vpn",
	.node = LDP_L2VPN_NODE,
	.parent_node = CONFIG_NODE,
	.prompt = "%s(config-l2vpn)# ",
};

static struct cmd_node ldp_pseudowire_node = {
	.name = "ldp",
	.node = LDP_PSEUDOWIRE_NODE,
	.parent_node = LDP_L2VPN_NODE,
	.prompt = "%s(config-l2vpn-pw)# ",
};
#endif /* HAVE_LDPD */

static struct cmd_node keychain_node = {
	.name = "keychain",
	.node = KEYCHAIN_NODE,
	.parent_node = CONFIG_NODE,
	.prompt = "%s(config-keychain)# ",
};

static struct cmd_node keychain_key_node = {
	.name = "keychain key",
	.node = KEYCHAIN_KEY_NODE,
	.parent_node = KEYCHAIN_NODE,
	.prompt = "%s(config-keychain-key)# ",
};

struct cmd_node link_params_node = {
	.name = "link-params",
	.node = LINK_PARAMS_NODE,
	.parent_node = INTERFACE_NODE,
	.prompt = "%s(config-link-params)# ",
	.no_xpath = true,
};

#ifdef HAVE_BGPD
static struct cmd_node rpki_node = {
	.name = "rpki",
	.node = RPKI_NODE,
	.parent_node = CONFIG_NODE,
	.prompt = "%s(config-rpki)# ",
};
#endif /* HAVE_BGPD */

#if HAVE_BFDD > 0
static struct cmd_node bfd_node = {
	.name = "bfd",
	.node = BFD_NODE,
	.parent_node = CONFIG_NODE,
	.prompt = "%s(config-bfd)# ",
};

static struct cmd_node bfd_peer_node = {
	.name = "bfd peer",
	.node = BFD_PEER_NODE,
	.parent_node = BFD_NODE,
	.prompt = "%s(config-bfd-peer)# ",
};

static struct cmd_node bfd_profile_node = {
	.name = "bfd profile",
	.node = BFD_PROFILE_NODE,
	.parent_node = BFD_NODE,
	.prompt = "%s(config-bfd-profile)# ",
};
#endif /* HAVE_BFDD */

/* Defined in lib/vty.c */
extern struct cmd_node vty_node;

/* When '^Z' is received from vty, move down to the enable mode. */
static int vtysh_end(void)
{
	switch (vty->node) {
	case VIEW_NODE:
	case ENABLE_NODE:
		/* Nothing to do. */
		break;
	default:
		vty->node = ENABLE_NODE;
		break;
	}
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_REALLYALL, vtysh_end_all, vtysh_end_all_cmd, "end",
	"End current mode and change to enable mode\n")
{
	return vtysh_end();
}

DEFUNSH(VTYSH_ZEBRA, srv6, srv6_cmd,
	"srv6",
	"Segment-Routing SRv6 configuration\n")
{
	vty->node = SRV6_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_ZEBRA, srv6_locators, srv6_locators_cmd,
	"locators",
	"Segment-Routing SRv6 locators configuration\n")
{
	vty->node = SRV6_LOCS_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_ZEBRA, srv6_locator, srv6_locator_cmd,
	"locator WORD",
	"Segment Routing SRv6 locator\n"
	"Specify locator-name\n")
{
	vty->node = SRV6_LOC_NODE;
	return CMD_SUCCESS;
}

#ifdef HAVE_BGPD
DEFUNSH(VTYSH_BGPD, router_bgp, router_bgp_cmd,
	"router bgp [(1-4294967295) [<view|vrf> WORD]]",
	ROUTER_STR BGP_STR AS_STR
	"BGP view\nBGP VRF\n"
	"View/VRF name\n")
{
	vty->node = BGP_NODE;
	return CMD_SUCCESS;
}

#ifdef KEEP_OLD_VPN_COMMANDS
DEFUNSH(VTYSH_BGPD, address_family_vpnv4, address_family_vpnv4_cmd,
	"address-family vpnv4 [unicast]",
	"Enter Address Family command mode\n"
	"Address Family\n"
	"Address Family modifier\n")
{
	vty->node = BGP_VPNV4_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_BGPD, address_family_vpnv6, address_family_vpnv6_cmd,
	"address-family vpnv6 [unicast]",
	"Enter Address Family command mode\n"
	"Address Family\n"
	"Address Family modifier\n")
{
	vty->node = BGP_VPNV6_NODE;
	return CMD_SUCCESS;
}
#endif /* KEEP_OLD_VPN_COMMANDS */

DEFUNSH(VTYSH_BGPD, address_family_ipv4, address_family_ipv4_cmd,
	"address-family ipv4 [unicast]",
	"Enter Address Family command mode\n"
	"Address Family\n"
	"Address Family Modifier\n")
{
	vty->node = BGP_IPV4_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_BGPD, address_family_flowspecv4, address_family_flowspecv4_cmd,
	"address-family ipv4 flowspec",
	"Enter Address Family command mode\n"
	"Address Family\n"
	"Address Family Modifier\n")
{
	vty->node = BGP_FLOWSPECV4_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_BGPD, address_family_flowspecv6, address_family_flowspecv6_cmd,
	"address-family ipv6 flowspec",
	"Enter Address Family command mode\n"
	"Address Family\n"
	"Address Family Modifier\n")
{
	vty->node = BGP_FLOWSPECV6_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_BGPD, address_family_ipv4_multicast,
	address_family_ipv4_multicast_cmd, "address-family ipv4 multicast",
	"Enter Address Family command mode\n"
	"Address Family\n"
	"Address Family modifier\n")
{
	vty->node = BGP_IPV4M_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_BGPD, address_family_ipv4_vpn, address_family_ipv4_vpn_cmd,
	"address-family ipv4 vpn",
	"Enter Address Family command mode\n"
	"Address Family\n"
	"Address Family modifier\n")
{
	vty->node = BGP_VPNV4_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_BGPD, address_family_ipv4_labeled_unicast,
	address_family_ipv4_labeled_unicast_cmd,
	"address-family ipv4 labeled-unicast",
	"Enter Address Family command mode\n"
	"Address Family\n"
	"Address Family modifier\n")
{
	vty->node = BGP_IPV4L_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_BGPD, address_family_ipv6, address_family_ipv6_cmd,
	"address-family ipv6 [unicast]",
	"Enter Address Family command mode\n"
	"Address Family\n"
	"Address Family modifier\n")
{
	vty->node = BGP_IPV6_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_BGPD, address_family_ipv6_multicast,
	address_family_ipv6_multicast_cmd, "address-family ipv6 multicast",
	"Enter Address Family command mode\n"
	"Address Family\n"
	"Address Family modifier\n")
{
	vty->node = BGP_IPV6M_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_BGPD, address_family_ipv6_vpn, address_family_ipv6_vpn_cmd,
	"address-family ipv6 vpn",
	"Enter Address Family command mode\n"
	"Address Family\n"
	"Address Family modifier\n")
{
	vty->node = BGP_VPNV6_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_BGPD, address_family_ipv6_labeled_unicast,
	address_family_ipv6_labeled_unicast_cmd,
	"address-family ipv6 labeled-unicast",
	"Enter Address Family command mode\n"
	"Address Family\n"
	"Address Family modifier\n")
{
	vty->node = BGP_IPV6L_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_BGPD,
	rpki,
	rpki_cmd,
	"rpki",
	"Enable rpki and enter rpki configuration mode\n")
{
	vty->node = RPKI_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_BGPD,
	bmp_targets,
	bmp_targets_cmd,
	"bmp targets BMPTARGETS",
	"BGP Monitoring Protocol\n"
	"Create BMP target group\n"
	"Name of the BMP target group\n")
{
	vty->node = BMP_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_BGPD,
        bgp_srv6,
        bgp_srv6_cmd,
        "segment-routing srv6",
        "Segment-Routing configuration\n"
        "Segment-Routing SRv6 configuration\n")
{
	vty->node = BGP_SRV6_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_BGPD,
        exit_bgp_srv6,
        exit_bgp_srv6_cmd,
        "exit",
        "exit Segment-Routing SRv6 configuration\n")
{
	if (vty->node == BGP_SRV6_NODE)
		vty->node = BGP_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_BGPD,
        quit_bgp_srv6,
        quit_bgp_srv6_cmd,
        "quit",
        "quit Segment-Routing SRv6 configuration\n")
{
	if (vty->node == BGP_SRV6_NODE)
		vty->node = BGP_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_BGPD, address_family_evpn, address_family_evpn_cmd,
	"address-family <l2vpn evpn>",
	"Enter Address Family command mode\n"
	"Address Family\n"
	"Address Family modifier\n")
{
	vty->node = BGP_EVPN_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_BGPD, bgp_evpn_vni, bgp_evpn_vni_cmd, "vni " CMD_VNI_RANGE,
	"VXLAN Network Identifier\n"
	"VNI number\n")
{
	vty->node = BGP_EVPN_VNI_NODE;
	return CMD_SUCCESS;
}

#if defined(ENABLE_BGP_VNC)
DEFUNSH(VTYSH_BGPD, vnc_defaults, vnc_defaults_cmd, "vnc defaults",
	"VNC/RFP related configuration\n"
	"Configure default NVE group\n")
{
	vty->node = BGP_VNC_DEFAULTS_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_BGPD, vnc_nve_group, vnc_nve_group_cmd, "vnc nve-group NAME",
	"VNC/RFP related configuration\n"
	"Configure a NVE group\n"
	"Group name\n")
{
	vty->node = BGP_VNC_NVE_GROUP_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_BGPD, vnc_vrf_policy, vnc_vrf_policy_cmd, "vrf-policy NAME",
	"Configure a VRF policy group\n"
	"Group name\n")
{
	vty->node = BGP_VRF_POLICY_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_BGPD, vnc_l2_group, vnc_l2_group_cmd, "vnc l2-group NAME",
	"VNC/RFP related configuration\n"
	"Configure a L2 group\n"
	"Group name\n")
{
	vty->node = BGP_VNC_L2_GROUP_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_BGPD, exit_vnc_config, exit_vnc_config_cmd, "exit-vnc",
	"Exit from VNC configuration mode\n")
{
	if (vty->node == BGP_VNC_DEFAULTS_NODE
	    || vty->node == BGP_VNC_NVE_GROUP_NODE
	    || vty->node == BGP_VNC_L2_GROUP_NODE)
		vty->node = BGP_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_BGPD, exit_vrf_policy, exit_vrf_policy_cmd, "exit-vrf-policy",
	"Exit from VRF policy configuration mode\n")
{
	if (vty->node == BGP_VRF_POLICY_NODE)
		vty->node = BGP_NODE;
	return CMD_SUCCESS;
}
#endif
#endif /* HAVE_BGPD */

DEFUNSH(VTYSH_KEYS, key_chain, key_chain_cmd, "key chain WORD",
	"Authentication key management\n"
	"Key-chain management\n"
	"Key-chain name\n")
{
	vty->node = KEYCHAIN_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_KEYS, key, key_cmd, "key (0-2147483647)",
	"Configure a key\n"
	"Key identifier number\n")
{
	vty->node = KEYCHAIN_KEY_NODE;
	return CMD_SUCCESS;
}

#ifdef HAVE_RIPD
DEFUNSH(VTYSH_RIPD, router_rip, router_rip_cmd, "router rip [vrf NAME]",
	ROUTER_STR "RIP\n" VRF_CMD_HELP_STR)
{
	vty->node = RIP_NODE;
	return CMD_SUCCESS;
}
#endif /* HAVE_RIPD */

#ifdef HAVE_RIPNGD
DEFUNSH(VTYSH_RIPNGD, router_ripng, router_ripng_cmd, "router ripng [vrf NAME]",
	ROUTER_STR "RIPng\n" VRF_CMD_HELP_STR)
{
	vty->node = RIPNG_NODE;
	return CMD_SUCCESS;
}
#endif /* HAVE_RIPNGD */

#ifdef HAVE_OSPFD
DEFUNSH(VTYSH_OSPFD, router_ospf, router_ospf_cmd,
	"router ospf [(1-65535)] [vrf NAME]",
	"Enable a routing process\n"
	"Start OSPF configuration\n"
	"Instance ID\n"
	VRF_CMD_HELP_STR)
{
	vty->node = OSPF_NODE;
	return CMD_SUCCESS;
}
#endif /* HAVE_OSPFD */

#ifdef HAVE_EIGRPD
DEFUNSH(VTYSH_EIGRPD, router_eigrp, router_eigrp_cmd, "router eigrp (1-65535) [vrf NAME]",
	"Enable a routing process\n"
	"Start EIGRP configuration\n"
	"AS number to use\n"
	VRF_CMD_HELP_STR)
{
	vty->node = EIGRP_NODE;
	return CMD_SUCCESS;
}
#endif /* HAVE_EIGRPD */

#ifdef HAVE_BABELD
DEFUNSH(VTYSH_BABELD, router_babel, router_babel_cmd, "router babel",
	"Enable a routing process\n"
	"Make Babel instance command\n")
{
	vty->node = BABEL_NODE;
	return CMD_SUCCESS;
}
#endif /* HAVE_BABELD */

#ifdef HAVE_OSPF6D
DEFUNSH(VTYSH_OSPF6D, router_ospf6, router_ospf6_cmd, "router ospf6 [vrf NAME]",
	ROUTER_STR OSPF6_STR VRF_CMD_HELP_STR)
{
	vty->node = OSPF6_NODE;
	return CMD_SUCCESS;
}
#endif

#if defined(HAVE_LDPD)
DEFUNSH(VTYSH_LDPD, ldp_mpls_ldp, ldp_mpls_ldp_cmd, "mpls ldp",
	"Global MPLS configuration subcommands\n"
	"Label Distribution Protocol\n")
{
	vty->node = LDP_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_LDPD, ldp_address_family_ipv4, ldp_address_family_ipv4_cmd,
	"address-family ipv4",
	"Configure Address Family and its parameters\n"
	"IPv4\n")
{
	vty->node = LDP_IPV4_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_LDPD, ldp_address_family_ipv6, ldp_address_family_ipv6_cmd,
	"address-family ipv6",
	"Configure Address Family and its parameters\n"
	"IPv6\n")
{
	vty->node = LDP_IPV6_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_LDPD, ldp_exit_address_family, ldp_exit_address_family_cmd,
	"exit-address-family", "Exit from Address Family configuration mode\n")
{
	if (vty->node == LDP_IPV4_NODE || vty->node == LDP_IPV6_NODE)
		vty->node = LDP_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_LDPD, ldp_interface_ifname, ldp_interface_ifname_cmd,
	"interface IFNAME",
	"Enable LDP on an interface and enter interface submode\n"
	"Interface's name\n")
{
	switch (vty->node) {
	case LDP_IPV4_NODE:
		vty->node = LDP_IPV4_IFACE_NODE;
		break;
	case LDP_IPV6_NODE:
		vty->node = LDP_IPV6_IFACE_NODE;
		break;
	default:
		break;
	}

	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_LDPD, ldp_l2vpn_word_type_vpls, ldp_l2vpn_word_type_vpls_cmd,
	"l2vpn WORD type vpls",
	"Configure l2vpn commands\n"
	"L2VPN name\n"
	"L2VPN type\n"
	"Virtual Private LAN Service\n")
{
	vty->node = LDP_L2VPN_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_LDPD, ldp_member_pseudowire_ifname,
	ldp_member_pseudowire_ifname_cmd, "member pseudowire IFNAME",
	"L2VPN member configuration\n"
	"Pseudowire interface\n"
	"Interface's name\n")
{
	vty->node = LDP_PSEUDOWIRE_NODE;
	return CMD_SUCCESS;
}
#endif

#ifdef HAVE_ISISD
DEFUNSH(VTYSH_ISISD, router_isis, router_isis_cmd,
	"router isis WORD [vrf NAME]",
	ROUTER_STR
	"ISO IS-IS\n"
	"ISO Routing area tag\n" VRF_CMD_HELP_STR)
{
	vty->node = ISIS_NODE;
	return CMD_SUCCESS;
}
#endif /* HAVE_ISISD */

#ifdef HAVE_FABRICD
DEFUNSH(VTYSH_FABRICD, router_openfabric, router_openfabric_cmd, "router openfabric WORD",
	ROUTER_STR
	"OpenFabric routing protocol\n"
	"ISO Routing area tag\n")
{
	vty->node = OPENFABRIC_NODE;
	return CMD_SUCCESS;
}
#endif /* HAVE_FABRICD */

DEFUNSH(VTYSH_SR, segment_routing, segment_routing_cmd,
	"segment-routing",
	"Configure segment routing\n")
{
	vty->node = SEGMENT_ROUTING_NODE;
	return CMD_SUCCESS;
}

#if defined (HAVE_PATHD)
DEFUNSH(VTYSH_PATHD, sr_traffic_eng, sr_traffic_eng_cmd,
	"traffic-eng",
	"Configure SR traffic engineering\n")
{
	vty->node = SR_TRAFFIC_ENG_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_PATHD, srte_segment_list, srte_segment_list_cmd,
	"segment-list WORD$name",
	"Segment List\n"
	"Segment List Name\n")
{
	vty->node = SR_SEGMENT_LIST_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_PATHD, srte_policy, srte_policy_cmd,
	"policy color (0-4294967295) endpoint <A.B.C.D|X:X::X:X>",
	"Segment Routing Policy\n"
	"SR Policy color\n"
	"SR Policy color value\n"
	"SR Policy endpoint\n"
	"SR Policy endpoint IPv4 address\n"
	"SR Policy endpoint IPv6 address\n")
{
	vty->node = SR_POLICY_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_PATHD, srte_policy_candidate_dyn_path,
	srte_policy_candidate_dyn_path_cmd,
	"candidate-path preference (0-4294967295) name WORD dynamic",
	"Segment Routing Policy Candidate Path\n"
	"Segment Routing Policy Candidate Path Preference\n"
	"Administrative Preference\n"
	"Segment Routing Policy Candidate Path Name\n"
	"Symbolic Name\n"
	"Dynamic Path\n")
{
	vty->node = SR_CANDIDATE_DYN_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_PATHD, pcep, pcep_cmd,
	"pcep",
	"Configure SR pcep\n")
{
	vty->node = PCEP_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_PATHD, pcep_cli_pcc, pcep_cli_pcc_cmd,
	"pcc",
	"PCC configuration\n")
{
	vty->node = PCEP_PCC_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_PATHD, pcep_cli_pce, pcep_cli_pce_cmd,
	"pce WORD",
	"PCE configuration\n"
	"Peer name\n")
{
	vty->node = PCEP_PCE_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_PATHD, pcep_cli_pcep_pce_config, pcep_cli_pcep_pce_config_cmd,
	"pce-config WORD",
	"PCEP peer Configuration Group\n"
	"PCEP peer Configuration Group name\n")
{
	vty->node = PCEP_PCE_CONFIG_NODE;
	return CMD_SUCCESS;
}

#endif /* HAVE_PATHD */

DEFUNSH(VTYSH_RMAP, vtysh_route_map, vtysh_route_map_cmd,
	"route-map RMAP_NAME <deny|permit> (1-65535)",
	"Create route-map or enter route-map command mode\n"
	"Route map tag\n"
	"Route map denies set operations\n"
	"Route map permits set operations\n"
	"Sequence to insert to/delete from existing route-map entry\n")
{
	vty->node = RMAP_NODE;
	return CMD_SUCCESS;
}

#ifdef HAVE_PBRD
DEFUNSH(VTYSH_PBRD, vtysh_pbr_map, vtysh_pbr_map_cmd,
	"pbr-map PBRMAP seq (1-700)",
	"Create pbr-map or enter pbr-map command mode\n"
	"The name of the PBR MAP\n"
	"Sequence to insert to/delete from existing pbr-map entry\n"
	"Sequence number\n")
{
	vty->node = PBRMAP_NODE;
	return CMD_SUCCESS;
}

DEFSH(VTYSH_PBRD, vtysh_no_pbr_map_cmd, "no pbr-map PBRMAP [seq (1-700)]",
	NO_STR
	"Delete pbr-map\n"
	"The name of  the PBR MAP\n"
	"Sequence to delete from existing pbr-map entry\n"
	"Sequence number\n")
#endif /* HAVE_PBRD */

#if HAVE_BFDD > 0
DEFUNSH(VTYSH_BFDD, bfd_enter, bfd_enter_cmd, "bfd", "Configure BFD peers\n")
{
	vty->node = BFD_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_BFDD, bfd_peer_enter, bfd_peer_enter_cmd,
	"peer <A.B.C.D|X:X::X:X> [{multihop|local-address <A.B.C.D|X:X::X:X>|interface IFNAME|vrf NAME}]",
	"Configure peer\n"
	"IPv4 peer address\n"
	"IPv6 peer address\n"
	"Configure multihop\n"
	"Configure local address\n"
	"IPv4 local address\n"
	"IPv6 local address\n"
	INTERFACE_STR
	"Configure interface name to use\n"
	"Configure VRF\n"
	"Configure VRF name\n")
{
	vty->node = BFD_PEER_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_BFDD, bfd_profile_enter, bfd_profile_enter_cmd,
	"profile BFDPROF",
	BFD_PROFILE_STR
	BFD_PROFILE_NAME_STR)
{
	vty->node = BFD_PROFILE_NODE;
	return CMD_SUCCESS;
}
#endif /* HAVE_BFDD */

DEFUNSH(VTYSH_ALL, vtysh_line_vty, vtysh_line_vty_cmd, "line vty",
	"Configure a terminal line\n"
	"Virtual terminal\n")
{
	vty->node = VTY_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_REALLYALL, vtysh_enable, vtysh_enable_cmd, "enable",
	"Turn on privileged mode command\n")
{
	vty->node = ENABLE_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_REALLYALL, vtysh_disable, vtysh_disable_cmd, "disable",
	"Turn off privileged mode command\n")
{
	if (vty->node == ENABLE_NODE)
		vty->node = VIEW_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_REALLYALL, vtysh_config_terminal, vtysh_config_terminal_cmd,
	"configure [terminal]",
	"Configuration from vty interface\n"
	"Configuration terminal\n")
{
	vty->node = CONFIG_NODE;
	return CMD_SUCCESS;
}

static int vtysh_exit(struct vty *vty)
{
	struct cmd_node *cnode = vector_lookup(cmdvec, vty->node);

	if (vty->node == VIEW_NODE || vty->node == ENABLE_NODE)
		exit(0);
	if (cnode->node_exit)
		cnode->node_exit(vty);
	if (cnode->parent_node)
		vty->node = cnode->parent_node;

	if (vty->node == CONFIG_NODE) {
		/* resync in case one of the daemons is somewhere else */
		vtysh_execute("end");
		vtysh_execute("configure");
	}
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_REALLYALL, vtysh_exit_all, vtysh_exit_all_cmd, "exit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit(vty);
}

DEFUNSH(VTYSH_REALLYALL, vtysh_quit_all, vtysh_quit_all_cmd, "quit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit_all(self, vty, argc, argv);
}

#ifdef HAVE_BGPD
DEFUNSH(VTYSH_BGPD, exit_address_family, exit_address_family_cmd,
	"exit-address-family", "Exit from Address Family configuration mode\n")
{
	if (vty->node == BGP_IPV4_NODE || vty->node == BGP_IPV4M_NODE
	    || vty->node == BGP_IPV4L_NODE || vty->node == BGP_VPNV4_NODE
	    || vty->node == BGP_VPNV6_NODE || vty->node == BGP_IPV6_NODE
	    || vty->node == BGP_IPV6L_NODE || vty->node == BGP_IPV6M_NODE
	    || vty->node == BGP_EVPN_NODE
	    || vty->node == BGP_FLOWSPECV4_NODE
	    || vty->node == BGP_FLOWSPECV6_NODE)
		vty->node = BGP_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_BGPD, exit_vni, exit_vni_cmd, "exit-vni", "Exit from VNI mode\n")
{
	if (vty->node == BGP_EVPN_VNI_NODE)
		vty->node = BGP_EVPN_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_BGPD, rpki_exit, rpki_exit_cmd, "exit",
	"Exit current mode and down to previous mode\n")
{
	vtysh_exit(vty);
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_BGPD, rpki_quit, rpki_quit_cmd, "quit",
	"Exit current mode and down to previous mode\n")
{
	return rpki_exit(self, vty, argc, argv);
}

DEFUNSH(VTYSH_BGPD, bmp_exit, bmp_exit_cmd, "exit",
	"Exit current mode and down to previous mode\n")
{
	vtysh_exit(vty);
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_BGPD, bmp_quit, bmp_quit_cmd, "quit",
	"Exit current mode and down to previous mode\n")
{
	return bmp_exit(self, vty, argc, argv);
}
#endif /* HAVE_BGPD */

DEFUNSH(VTYSH_VRF, exit_vrf_config, exit_vrf_config_cmd, "exit-vrf",
	"Exit from VRF configuration mode\n")
{
	if (vty->node == VRF_NODE)
		vty->node = CONFIG_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_ZEBRA, exit_srv6_config, exit_srv6_config_cmd, "exit",
	"Exit from SRv6 configuration mode\n")
{
	if (vty->node == SRV6_NODE)
		vty->node = SEGMENT_ROUTING_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_ZEBRA, exit_srv6_locs_config, exit_srv6_locs_config_cmd, "exit",
	"Exit from SRv6-locator configuration mode\n")
{
	if (vty->node == SRV6_LOCS_NODE)
		vty->node = SRV6_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_ZEBRA, exit_srv6_loc_config, exit_srv6_loc_config_cmd, "exit",
	"Exit from SRv6-locators configuration mode\n")
{
	if (vty->node == SRV6_LOC_NODE)
		vty->node = SRV6_LOCS_NODE;
	return CMD_SUCCESS;
}

#ifdef HAVE_RIPD
DEFUNSH(VTYSH_RIPD, vtysh_exit_ripd, vtysh_exit_ripd_cmd, "exit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit(vty);
}

DEFUNSH(VTYSH_RIPD, vtysh_quit_ripd, vtysh_quit_ripd_cmd, "quit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit_ripd(self, vty, argc, argv);
}
#endif /* HAVE_RIPD */

#ifdef HAVE_RIPNGD
DEFUNSH(VTYSH_RIPNGD, vtysh_exit_ripngd, vtysh_exit_ripngd_cmd, "exit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit(vty);
}

DEFUNSH(VTYSH_RIPNGD, vtysh_quit_ripngd, vtysh_quit_ripngd_cmd, "quit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit_ripngd(self, vty, argc, argv);
}
#endif /* HAVE_RIPNGD */

DEFUNSH(VTYSH_RMAP, vtysh_exit_rmap, vtysh_exit_rmap_cmd, "exit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit(vty);
}

DEFUNSH(VTYSH_RMAP, vtysh_quit_rmap, vtysh_quit_rmap_cmd, "quit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit_rmap(self, vty, argc, argv);
}

#ifdef HAVE_PBRD
DEFUNSH(VTYSH_PBRD, vtysh_exit_pbr_map, vtysh_exit_pbr_map_cmd, "exit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit(vty);
}

DEFUNSH(VTYSH_PBRD, vtysh_quit_pbr_map, vtysh_quit_pbr_map_cmd, "quit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit_rmap(self, vty, argc, argv);
}
#endif /* HAVE_PBRD */

#ifdef HAVE_BGPD
DEFUNSH(VTYSH_BGPD, vtysh_exit_bgpd, vtysh_exit_bgpd_cmd, "exit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit(vty);
}

DEFUNSH(VTYSH_BGPD, vtysh_quit_bgpd, vtysh_quit_bgpd_cmd, "quit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit_bgpd(self, vty, argc, argv);
}
#endif /* HAVE_BGPD */

#ifdef HAVE_OSPFD
DEFUNSH(VTYSH_OSPFD, vtysh_exit_ospfd, vtysh_exit_ospfd_cmd, "exit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit(vty);
}

DEFUNSH(VTYSH_OSPFD, vtysh_quit_ospfd, vtysh_quit_ospfd_cmd, "quit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit_ospfd(self, vty, argc, argv);
}
#endif /* HAVE_OSPFD */

#ifdef HAVE_EIGRPD
DEFUNSH(VTYSH_EIGRPD, vtysh_exit_eigrpd, vtysh_exit_eigrpd_cmd, "exit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit(vty);
}

DEFUNSH(VTYSH_EIGRPD, vtysh_quit_eigrpd, vtysh_quit_eigrpd_cmd, "quit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit(vty);
}
#endif /* HAVE_EIGRPD */

#ifdef HAVE_BABELD
DEFUNSH(VTYSH_BABELD, vtysh_exit_babeld, vtysh_exit_babeld_cmd, "exit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit(vty);
}

DEFUNSH(VTYSH_BABELD, vtysh_quit_babeld, vtysh_quit_babeld_cmd, "quit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit(vty);
}
#endif /* HAVE_BABELD */

#ifdef HAVE_OSPF6D
DEFUNSH(VTYSH_OSPF6D, vtysh_exit_ospf6d, vtysh_exit_ospf6d_cmd, "exit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit(vty);
}

DEFUNSH(VTYSH_OSPF6D, vtysh_quit_ospf6d, vtysh_quit_ospf6d_cmd, "quit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit_ospf6d(self, vty, argc, argv);
}
#endif /* HAVE_OSPF6D */

#if defined(HAVE_LDPD)
DEFUNSH(VTYSH_LDPD, vtysh_exit_ldpd, vtysh_exit_ldpd_cmd, "exit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit(vty);
}

ALIAS(vtysh_exit_ldpd, vtysh_quit_ldpd_cmd, "quit",
      "Exit current mode and down to previous mode\n")
#endif

#ifdef HAVE_ISISD
DEFUNSH(VTYSH_ISISD, vtysh_exit_isisd, vtysh_exit_isisd_cmd, "exit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit(vty);
}

DEFUNSH(VTYSH_ISISD, vtysh_quit_isisd, vtysh_quit_isisd_cmd, "quit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit_isisd(self, vty, argc, argv);
}
#endif /* HAVE_ISISD */

#if HAVE_BFDD > 0
DEFUNSH(VTYSH_BFDD, vtysh_exit_bfdd, vtysh_exit_bfdd_cmd, "exit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit(vty);
}

ALIAS(vtysh_exit_bfdd, vtysh_quit_bfdd_cmd, "quit",
      "Exit current mode and down to previous mode\n")
#endif

#ifdef HAVE_FABRICD
DEFUNSH(VTYSH_FABRICD, vtysh_exit_fabricd, vtysh_exit_fabricd_cmd, "exit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit(vty);
}

DEFUNSH(VTYSH_FABRICD, vtysh_quit_fabricd, vtysh_quit_fabricd_cmd, "quit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit_fabricd(self, vty, argc, argv);
}
#endif /* HAVE_FABRICD */

DEFUNSH(VTYSH_KEYS, vtysh_exit_keys, vtysh_exit_keys_cmd, "exit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit(vty);
}

DEFUNSH(VTYSH_KEYS, vtysh_quit_keys, vtysh_quit_keys_cmd, "quit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit_keys(self, vty, argc, argv);
}

DEFUNSH(VTYSH_SR, vtysh_exit_sr, vtysh_exit_sr_cmd, "exit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit(vty);
}

DEFUNSH(VTYSH_SR, vtysh_quit_sr, vtysh_quit_sr_cmd, "quit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit(vty);
}

#if defined(HAVE_PATHD)
DEFUNSH(VTYSH_PATHD, vtysh_exit_pathd, vtysh_exit_pathd_cmd, "exit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit(vty);
}

DEFUNSH(VTYSH_PATHD, vtysh_quit_pathd, vtysh_quit_pathd_cmd, "quit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit_pathd(self, vty, argc, argv);
}
#endif /* HAVE_PATHD */

DEFUNSH(VTYSH_ALL, vtysh_exit_line_vty, vtysh_exit_line_vty_cmd, "exit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit(vty);
}

DEFUNSH(VTYSH_ALL, vtysh_quit_line_vty, vtysh_quit_line_vty_cmd, "quit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit_line_vty(self, vty, argc, argv);
}

DEFUNSH(VTYSH_INTERFACE, vtysh_interface, vtysh_interface_cmd,
	"interface IFNAME [vrf NAME]",
	"Select an interface to configure\n"
	"Interface's name\n" VRF_CMD_HELP_STR)
{
	vty->node = INTERFACE_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_ZEBRA, vtysh_pseudowire, vtysh_pseudowire_cmd,
	"pseudowire IFNAME",
	"Static pseudowire configuration\n"
	"Pseudowire name\n")
{
	vty->node = PW_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_NH_GROUP,
	vtysh_nexthop_group, vtysh_nexthop_group_cmd,
	"nexthop-group NHGNAME",
	"Nexthop Group configuration\n"
	"Name of the Nexthop Group\n")
{
	vty->node = NH_GROUP_NODE;
	return CMD_SUCCESS;
}

DEFSH(VTYSH_NH_GROUP, vtysh_no_nexthop_group_cmd,
      "no nexthop-group NHGNAME",
      NO_STR
      "Nexthop Group Configuration\n"
      "Name of the Nexthop Group\n")

DEFUNSH(VTYSH_VRF, vtysh_vrf, vtysh_vrf_cmd, "vrf NAME",
	"Select a VRF to configure\n"
	"VRF's name\n")
{
	vty->node = VRF_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_VRF, vtysh_exit_vrf, vtysh_exit_vrf_cmd, "exit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit(vty);
}

DEFUNSH(VTYSH_VRF, vtysh_quit_vrf, vtysh_quit_vrf_cmd, "quit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit_vrf(self, vty, argc, argv);
}

DEFUNSH(VTYSH_NH_GROUP,
	vtysh_exit_nexthop_group, vtysh_exit_nexthop_group_cmd,
	"exit", "Exit current mode and down to previous mode\n")
{
	return vtysh_exit(vty);
}

DEFUNSH(VTYSH_NH_GROUP,
	vtysh_quit_nexthop_group, vtysh_quit_nexthop_group_cmd,
	"quit", "Exit current mode and down to previous mode\n")
{
	return vtysh_exit_nexthop_group(self, vty, argc, argv);
}

DEFUNSH(VTYSH_INTERFACE, vtysh_exit_interface, vtysh_exit_interface_cmd, "exit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit(vty);
}

DEFUNSH(VTYSH_INTERFACE, vtysh_quit_interface, vtysh_quit_interface_cmd, "quit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit_interface(self, vty, argc, argv);
}

DEFUNSH(VTYSH_ZEBRA, vtysh_exit_pseudowire, vtysh_exit_pseudowire_cmd, "exit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit(vty);
}

DEFUNSH(VTYSH_ZEBRA, vtysh_quit_pseudowire, vtysh_quit_pseudowire_cmd, "quit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit_pseudowire(self, vty, argc, argv);
}

static char *do_prepend(struct vty *vty, struct cmd_token **argv, int argc)
{
	const char *argstr[argc + 1];
	int i, off = 0;

	if (vty->node != VIEW_NODE) {
		off = 1;
		argstr[0] = "do";
	}

	for (i = 0; i < argc; i++)
		argstr[i + off] = argv[i]->arg;

	return frrstr_join(argstr, argc + off, " ");
}

static int show_per_daemon(struct vty *vty, struct cmd_token **argv, int argc,
			   const char *headline)
{
	unsigned int i;
	int ret = CMD_SUCCESS;
	char *line = do_prepend(vty, argv, argc);

	for (i = 0; i < array_size(vtysh_client); i++)
		if (vtysh_client[i].fd >= 0 || vtysh_client[i].next) {
			vty_out(vty, headline, vtysh_client[i].name);
			ret = vtysh_client_execute(&vtysh_client[i], line);
			vty_out(vty, "\n");
		}

	XFREE(MTYPE_TMP, line);

	return ret;
}

static int show_one_daemon(struct vty *vty, struct cmd_token **argv, int argc,
			   const char *name)
{
	int ret;
	char *line = do_prepend(vty, argv, argc);

	ret = vtysh_client_execute_name(name, line);

	XFREE(MTYPE_TMP, line);

	return ret;
}

DEFUN (vtysh_show_poll,
       vtysh_show_poll_cmd,
       "show thread poll",
       SHOW_STR
       "Thread information\n"
       "Thread Poll Information\n")
{
	return show_per_daemon(vty, argv, argc, "Thread statistics for %s:\n");
}

DEFUN (vtysh_show_thread,
       vtysh_show_thread_cmd,
       "show thread cpu [FILTER]",
       SHOW_STR
       "Thread information\n"
       "Thread CPU usage\n"
       "Display filter (rwtexb)\n")
{
	return show_per_daemon(vty, argv, argc, "Thread statistics for %s:\n");
}

DEFUN (vtysh_show_work_queues,
       vtysh_show_work_queues_cmd,
       "show work-queues",
       SHOW_STR
       "Work Queue information\n")
{
	return show_per_daemon(vty, argv, argc,
			       "Work queue statistics for %s:\n");
}

DEFUN (vtysh_show_work_queues_daemon,
       vtysh_show_work_queues_daemon_cmd,
       "show work-queues " DAEMONS_LIST,
       SHOW_STR
       "Work Queue information\n"
       DAEMONS_STR)
{
	return show_one_daemon(vty, argv, argc - 1, argv[argc - 1]->text);
}

DEFUNSH(VTYSH_ZEBRA, vtysh_link_params, vtysh_link_params_cmd, "link-params",
	LINK_PARAMS_STR)
{
	vty->node = LINK_PARAMS_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_ZEBRA, exit_link_params, exit_link_params_cmd, "exit-link-params",
	"Exit from Link Params configuration node\n")
{
	if (vty->node == LINK_PARAMS_NODE)
		vty->node = INTERFACE_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_ZEBRA, vtysh_exit_link_params, vtysh_exit_link_params_cmd, "exit",
	"Exit current mode and down to previous mode\n")
{
	if (vty->node == LINK_PARAMS_NODE)
		vty->node = INTERFACE_NODE;
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_ZEBRA, vtysh_quit_link_params, vtysh_quit_link_params_cmd, "quit",
	"Exit current mode and down to previous mode\n")
{
	return vtysh_exit_link_params(self, vty, argc, argv);
}

DEFUNSH_HIDDEN (0x00,
                vtysh_debug_all,
                vtysh_debug_all_cmd,
                "[no] debug all",
                NO_STR
                DEBUG_STR
                "Toggle all debugs on or off\n")
{
	return CMD_SUCCESS;
}

DEFUN (vtysh_show_debugging,
       vtysh_show_debugging_cmd,
       "show debugging",
       SHOW_STR
       DEBUG_STR)
{
	return show_per_daemon(vty, argv, argc, "");
}

DEFUN (vtysh_show_debugging_hashtable,
       vtysh_show_debugging_hashtable_cmd,
       "show debugging hashtable [statistics]",
       SHOW_STR
       DEBUG_STR
       "Statistics about hash tables\n"
       "Statistics about hash tables\n")
{
	bool stats = strmatch(argv[argc - 1]->text, "statistics");

	vty_out(vty, "\n");
	vty_out(vty,
		"Load factor (LF) - average number of elements across all buckets\n");
	vty_out(vty,
		"Full load factor (FLF) - average number of elements across full buckets\n\n");
	vty_out(vty,
		"Standard deviation (SD) is calculated for both the LF and FLF\n");
	vty_out(vty,
		"and indicates the typical deviation of bucket chain length\n");
	vty_out(vty, "from the value in the corresponding load factor.\n\n");

	return show_per_daemon(vty, argv, stats ? argc - 1 : argc,
			       "Hashtable statistics for %s:\n");
}

DEFUN (vtysh_show_error_code,
       vtysh_show_error_code_cmd,
       "show error <(1-4294967296)|all> [json]",
       SHOW_STR
       "Information on errors\n"
       "Error code to get info about\n"
       "Information on all errors\n"
       JSON_STR)
{
	uint32_t arg = 0;

	if (!strmatch(argv[2]->text, "all"))
		arg = strtoul(argv[2]->arg, NULL, 10);

	/* If it's not a shared code, send it to all the daemons */
	if (arg < LIB_FERR_START || arg > LIB_FERR_END) {
		show_per_daemon(vty, argv, argc, "");
		/* Otherwise, print it ourselves to avoid duplication */
	} else {
		bool json = strmatch(argv[argc - 1]->text, "json");

		if (!strmatch(argv[2]->text, "all"))
			arg = strtoul(argv[2]->arg, NULL, 10);

		log_ref_display(vty, arg, json);
	}

	return CMD_SUCCESS;
}

/* Northbound. */
DEFUN_HIDDEN (show_config_running,
       show_config_running_cmd,
       "show configuration running\
          [<json|xml> [translate WORD]]\
          [with-defaults]" DAEMONS_LIST,
       SHOW_STR
       "Configuration information\n"
       "Running configuration\n"
       "Change output format to JSON\n"
       "Change output format to XML\n"
       "Translate output\n"
       "YANG module translator\n"
       "Show default values\n"
       DAEMONS_STR)
{
	return show_one_daemon(vty, argv, argc - 1, argv[argc - 1]->text);
}

DEFUN (show_yang_operational_data,
       show_yang_operational_data_cmd,
       "show yang operational-data XPATH\
         [{\
	   format <json|xml>\
	   |translate WORD\
	 }]" DAEMONS_LIST,
       SHOW_STR
       "YANG information\n"
       "Show YANG operational data\n"
       "XPath expression specifying the YANG data path\n"
       "Set the output format\n"
       "JavaScript Object Notation\n"
       "Extensible Markup Language\n"
       "Translate operational data\n"
       "YANG module translator\n"
       DAEMONS_STR)
{
	return show_one_daemon(vty, argv, argc - 1, argv[argc - 1]->text);
}

DEFUN(show_yang_module, show_yang_module_cmd,
      "show yang module [module-translator WORD] " DAEMONS_LIST,
      SHOW_STR
      "YANG information\n"
      "Show loaded modules\n"
      "YANG module translator\n"
      "YANG module translator\n" DAEMONS_STR)
{
	return show_one_daemon(vty, argv, argc - 1, argv[argc - 1]->text);
}

DEFUN(show_yang_module_detail, show_yang_module_detail_cmd,
      "show yang module\
          [module-translator WORD]\
          WORD <compiled|summary|tree|yang|yin> " DAEMONS_LIST,
      SHOW_STR
      "YANG information\n"
      "Show loaded modules\n"
      "YANG module translator\n"
      "YANG module translator\n"
      "Module name\n"
      "Display compiled module in YANG format\n"
      "Display summary information about the module\n"
      "Display module in the tree (RFC 8340) format\n"
      "Display module in the YANG format\n"
      "Display module in the YIN format\n" DAEMONS_STR)
{
	return show_one_daemon(vty, argv, argc - 1, argv[argc - 1]->text);
}


DEFUNSH(VTYSH_ALL, debug_nb,
	debug_nb_cmd,
	"[no] debug northbound\
	   [<\
	    callbacks [{configuration|state|rpc}]\
	    |notifications\
	    |events\
	    |libyang\
	   >]",
	NO_STR
	DEBUG_STR
	"Northbound debugging\n"
	"Callbacks\n"
	"Configuration\n"
	"State\n"
	"RPC\n"
	"Notifications\n"
	"Events\n"
	"libyang debugging\n")
{
	return CMD_SUCCESS;
}

DEFUN (vtysh_show_history,
       vtysh_show_history_cmd,
       "show history",
       SHOW_STR
       "The list of commands stored in history\n")
{
	HIST_ENTRY **hlist = history_list();
	int i = 0;

	while (hlist[i]) {
		vty_out(vty, "%s\n", hlist[i]->line);
		i++;
	}
	return CMD_SUCCESS;
}

/* Memory */
DEFUN (vtysh_show_memory,
       vtysh_show_memory_cmd,
       "show memory [" DAEMONS_LIST "]",
       SHOW_STR
       "Memory statistics\n"
       DAEMONS_STR)
{
	if (argc == 3)
		return show_one_daemon(vty, argv, argc - 1,
				       argv[argc - 1]->text);

	return show_per_daemon(vty, argv, argc, "Memory statistics for %s:\n");
}

DEFUN (vtysh_show_modules,
       vtysh_show_modules_cmd,
       "show modules",
       SHOW_STR
       "Loaded modules\n")
{
	return show_per_daemon(vty, argv, argc, "Module information for %s:\n");
}

/* Logging commands. */
DEFUN (vtysh_show_logging,
       vtysh_show_logging_cmd,
       "show logging",
       SHOW_STR
       "Show current logging configuration\n")
{
	return show_per_daemon(vty, argv, argc,
			       "Logging configuration for %s:\n");
}

DEFUNSH(VTYSH_ALL, vtysh_debug_memstats,
	vtysh_debug_memstats_cmd, "[no] debug memstats-at-exit",
	NO_STR
	"Debug\n"
	"Print memory statistics at exit\n")
{
	return CMD_SUCCESS;
}

DEFUN(vtysh_debug_uid_backtrace,
      vtysh_debug_uid_backtrace_cmd,
      "[no] debug unique-id UID backtrace",
      NO_STR
      DEBUG_STR
      "Options per individual log message, by unique ID\n"
      "Log message unique ID (XXXXX-XXXXX)\n"
      "Add backtrace to log when message is printed\n")
{
	unsigned int i, ok = 0;
	int err = CMD_SUCCESS, ret;
	const char *uid;
	char line[64];

	if (!strcmp(argv[0]->text, "no")) {
		uid = argv[3]->arg;
		snprintfrr(line, sizeof(line),
			   "no debug unique-id %s backtrace", uid);
	} else {
		uid = argv[2]->arg;
		snprintfrr(line, sizeof(line), "debug unique-id %s backtrace",
			   uid);
	}

	for (i = 0; i < array_size(vtysh_client); i++)
		if (vtysh_client[i].fd >= 0 || vtysh_client[i].next) {
			ret = vtysh_client_execute(&vtysh_client[i], line);
			switch (ret) {
			case CMD_SUCCESS:
				ok++;
				break;
			case CMD_ERR_NOTHING_TODO:
				/* ignore this daemon
				 *
				 * note this doesn't need to handle instances
				 * of the same daemon individually because
				 * the same daemon will have the same UIDs
				 */
				break;
			default:
				if (err == CMD_SUCCESS)
					err = ret;
				break;
			}
		}

	if (err == CMD_SUCCESS && !ok) {
		vty_out(vty, "%% no running daemon recognizes unique-ID %s\n",
			uid);
		err = CMD_WARNING;
	}
	return err;
}

DEFUNSH(VTYSH_ALL, vtysh_service_password_encrypt,
	vtysh_service_password_encrypt_cmd, "service password-encryption",
	"Set up miscellaneous service\n"
	"Enable encrypted passwords\n")
{
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_ALL, no_vtysh_service_password_encrypt,
	no_vtysh_service_password_encrypt_cmd, "no service password-encryption",
	NO_STR
	"Set up miscellaneous service\n"
	"Enable encrypted passwords\n")
{
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_ALL, vtysh_config_password, vtysh_password_cmd,
	"password [(8-8)] LINE",
	"Modify the terminal connection password\n"
	"Specifies a HIDDEN password will follow\n"
	"The password string\n")
{
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_ALL, no_vtysh_config_password, no_vtysh_password_cmd,
	"no password", NO_STR
	"Modify the terminal connection password\n")
{
	vty_out(vty, NO_PASSWD_CMD_WARNING);

	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_ALL, vtysh_config_enable_password, vtysh_enable_password_cmd,
	"enable password [(8-8)] LINE",
	"Modify enable password parameters\n"
	"Assign the privileged level password\n"
	"Specifies a HIDDEN password will follow\n"
	"The 'enable' password string\n")
{
	return CMD_SUCCESS;
}

DEFUNSH(VTYSH_ALL, no_vtysh_config_enable_password,
	no_vtysh_enable_password_cmd, "no enable password", NO_STR
	"Modify enable password parameters\n"
	"Assign the privileged level password\n")
{
	vty_out(vty, NO_PASSWD_CMD_WARNING);

	return CMD_SUCCESS;
}

DEFUN (vtysh_write_terminal,
       vtysh_write_terminal_cmd,
       "write terminal ["DAEMONS_LIST"] [no-header]",
       "Write running configuration to memory, network, or terminal\n"
       "Write to terminal\n"
       DAEMONS_STR
       "Skip \"Building configuration...\" header\n")
{
	unsigned int i;
	char line[] = "do write terminal\n";

	if (!strcmp(argv[argc - 1]->arg, "no-header"))
		argc--;
	else {
		vty_out(vty, "Building configuration...\n");
		vty_out(vty, "\nCurrent configuration:\n");
		vty_out(vty, "!\n");
	}

	for (i = 0; i < array_size(vtysh_client); i++)
		if ((argc < 3)
		    || (strmatch(vtysh_client[i].name, argv[2]->text)))
			vtysh_client_config(&vtysh_client[i], line);

	/* Integrate vtysh specific configuration. */
	vty_open_pager(vty);
	vtysh_config_write();
	vtysh_config_dump();
	vty_close_pager(vty);
	vty_out(vty, "end\n");

	return CMD_SUCCESS;
}

DEFUN (vtysh_show_running_config,
       vtysh_show_running_config_cmd,
       "show running-config ["DAEMONS_LIST"] [no-header]",
       SHOW_STR
       "Current operating configuration\n"
       DAEMONS_STR
       "Skip \"Building configuration...\" header\n")
{
	return vtysh_write_terminal(self, vty, argc, argv);
}

DEFUN (vtysh_integrated_config,
       vtysh_integrated_config_cmd,
       "service integrated-vtysh-config",
       "Set up miscellaneous service\n"
       "Write configuration into integrated file\n")
{
	vtysh_write_integrated = WRITE_INTEGRATED_YES;
	return CMD_SUCCESS;
}

DEFUN (no_vtysh_integrated_config,
       no_vtysh_integrated_config_cmd,
       "no service integrated-vtysh-config",
       NO_STR
       "Set up miscellaneous service\n"
       "Write configuration into integrated file\n")
{
	vtysh_write_integrated = WRITE_INTEGRATED_NO;
	return CMD_SUCCESS;
}

static void backup_config_file(const char *fbackup)
{
	char *integrate_sav = NULL;

	size_t integrate_sav_sz = strlen(fbackup) + strlen(CONF_BACKUP_EXT) + 1;
	integrate_sav = malloc(integrate_sav_sz);
	strlcpy(integrate_sav, fbackup, integrate_sav_sz);
	strlcat(integrate_sav, CONF_BACKUP_EXT, integrate_sav_sz);

	/* Move current configuration file to backup config file. */
	if (unlink(integrate_sav) != 0 && errno != ENOENT)
		vty_out(vty, "Unlink failed for %s: %s\n", integrate_sav,
			strerror(errno));
	if (rename(fbackup, integrate_sav) != 0 && errno != ENOENT)
		vty_out(vty, "Error renaming %s to %s: %s\n", fbackup,
			integrate_sav, strerror(errno));
	free(integrate_sav);
}

int vtysh_write_config_integrated(void)
{
	unsigned int i;
	char line[] = "do write terminal\n";
	FILE *fp;
	int fd;
#ifdef FRR_USER
	struct passwd *pwentry;
#endif
#ifdef FRR_GROUP
	struct group *grentry;
#endif
	uid_t uid = -1;
	gid_t gid = -1;
	struct stat st;
	int err = 0;

	vty_out(vty, "Building Configuration...\n");

	backup_config_file(frr_config);
	fp = fopen(frr_config, "w");
	if (fp == NULL) {
		vty_out(vty,
			"%% Error: failed to open configuration file %s: %s\n",
			frr_config, safe_strerror(errno));
		return CMD_WARNING_CONFIG_FAILED;
	}
	fd = fileno(fp);

	for (i = 0; i < array_size(vtysh_client); i++)
		vtysh_client_config(&vtysh_client[i], line);

	vtysh_config_write();
	vty->of_saved = vty->of;
	vty->of = fp;
	vtysh_config_dump();
	vty->of = vty->of_saved;

	if (fchmod(fd, CONFIGFILE_MASK) != 0) {
		printf("%% Warning: can't chmod configuration file %s: %s\n",
		       frr_config, safe_strerror(errno));
		err++;
	}

#ifdef FRR_USER
	pwentry = getpwnam(FRR_USER);
	if (pwentry)
		uid = pwentry->pw_uid;
	else {
		printf("%% Warning: could not look up user \"%s\"\n", FRR_USER);
		err++;
	}
#endif
#ifdef FRR_GROUP
	grentry = getgrnam(FRR_GROUP);
	if (grentry)
		gid = grentry->gr_gid;
	else {
		printf("%% Warning: could not look up group \"%s\"\n",
		       FRR_GROUP);
		err++;
	}
#endif

	if (!fstat(fd, &st)) {
		if (st.st_uid == uid)
			uid = -1;
		if (st.st_gid == gid)
			gid = -1;
		if ((uid != (uid_t)-1 || gid != (gid_t)-1)
		    && fchown(fd, uid, gid)) {
			printf("%% Warning: can't chown configuration file %s: %s\n",
			       frr_config, safe_strerror(errno));
			err++;
		}
	} else {
		printf("%% Warning: stat() failed on %s: %s\n", frr_config,
		       safe_strerror(errno));
		err++;
	}

	fclose(fp);

	printf("Integrated configuration saved to %s\n", frr_config);
	if (err)
		return CMD_WARNING;

	printf("[OK]\n");
	return CMD_SUCCESS;
}

static bool want_config_integrated(void)
{
	struct stat s;

	switch (vtysh_write_integrated) {
	case WRITE_INTEGRATED_UNSPECIFIED:
		if (stat(frr_config, &s) && errno == ENOENT)
			return false;
		return true;
	case WRITE_INTEGRATED_NO:
		return false;
	case WRITE_INTEGRATED_YES:
		return true;
	}
	return true;
}

DEFUN (vtysh_write_memory,
       vtysh_write_memory_cmd,
       "write [<memory|file>]",
       "Write running configuration to memory, network, or terminal\n"
       "Write configuration to the file (same as write file)\n"
       "Write configuration to the file (same as write memory)\n")
{
	int ret = CMD_SUCCESS;
	char line[] = "do write memory\n";
	unsigned int i;

	vty_out(vty, "Note: this version of vtysh never writes vtysh.conf\n");

	/* If integrated frr.conf explicitely set. */
	if (want_config_integrated()) {
		ret = CMD_WARNING_CONFIG_FAILED;

		/* first attempt to use watchfrr if it's available */
		bool used_watchfrr = false;

		for (i = 0; i < array_size(vtysh_client); i++)
			if (vtysh_client[i].flag == VTYSH_WATCHFRR)
				break;
		if (i < array_size(vtysh_client) && vtysh_client[i].fd != -1) {
			used_watchfrr = true;
			ret = vtysh_client_execute(&vtysh_client[i],
						   "do write integrated");
		}

		/*
		 * If we didn't use watchfrr, fallback to writing the config
		 * ourselves
		 */
		if (!used_watchfrr) {
			printf("\nWarning: attempting direct configuration write without watchfrr.\nFile permissions and ownership may be incorrect, or write may fail.\n\n");
			ret = vtysh_write_config_integrated();
		}
		return ret;
	}

	vty_out(vty, "Building Configuration...\n");

	for (i = 0; i < array_size(vtysh_client); i++)
		ret = vtysh_client_execute(&vtysh_client[i], line);

	return ret;
}

DEFUN (vtysh_copy_running_config,
       vtysh_copy_running_config_cmd,
       "copy running-config startup-config",
       "Copy from one file to another\n"
       "Copy from current system configuration\n"
       "Copy to startup configuration\n")
{
	return vtysh_write_memory(self, vty, argc, argv);
}

DEFUN (vtysh_copy_to_running,
       vtysh_copy_to_running_cmd,
       "copy FILENAME running-config",
       "Apply a configuration file\n"
       "Configuration file to read\n"
       "Apply to current configuration\n")
{
	int ret;
	const char *fname = argv[1]->arg;

	ret = vtysh_read_config(fname, true);

	/* Return to enable mode - the 'read_config' api leaves us up a level */
	vtysh_execute_no_pager("enable");

	return ret;
}

DEFUN (vtysh_terminal_paginate,
       vtysh_terminal_paginate_cmd,
       "[no] terminal paginate",
       NO_STR
       "Set terminal line parameters\n"
       "Use pager for output scrolling\n")
{
	free(vtysh_pager_name);
	vtysh_pager_name = NULL;

	if (strcmp(argv[0]->text, "no"))
		vtysh_pager_envdef(true);
	return CMD_SUCCESS;
}

DEFUN (vtysh_terminal_length,
       vtysh_terminal_length_cmd,
       "[no] terminal length (0-4294967295)",
       NO_STR
       "Set terminal line parameters\n"
       "Set number of lines on a screen\n"
       "Number of lines on screen (0 for no pausing, nonzero to use pager)\n")
{
	int idx_number = 2;
	unsigned long lines;

	free(vtysh_pager_name);
	vtysh_pager_name = NULL;

	if (!strcmp(argv[0]->text, "no") || !strcmp(argv[1]->text, "no")) {
		/* "terminal no length" = use VTYSH_PAGER */
		vtysh_pager_envdef(true);
		return CMD_SUCCESS;
	}

	lines = strtoul(argv[idx_number]->arg, NULL, 10);
	if (lines != 0) {
		vty_out(vty,
			"%% The \"terminal length\" command is deprecated and its value is ignored.\n"
			"%% Please use \"terminal paginate\" instead with OS TTY length handling.\n");
		vtysh_pager_envdef(true);
	}

	return CMD_SUCCESS;
}

ALIAS_DEPRECATED(vtysh_terminal_length,
       vtysh_terminal_no_length_cmd,
       "terminal no length",
       "Set terminal line parameters\n"
       NO_STR
       "Set number of lines on a screen\n")

DEFUN (vtysh_show_daemons,
       vtysh_show_daemons_cmd,
       "show daemons",
       SHOW_STR
       "Show list of running daemons\n")
{
	unsigned int i;

	for (i = 0; i < array_size(vtysh_client); i++)
		if (vtysh_client[i].fd >= 0)
			vty_out(vty, " %s", vtysh_client[i].name);
	vty_out(vty, "\n");

	return CMD_SUCCESS;
}

/* Execute command in child process. */
static void execute_command(const char *command, int argc, const char *arg1,
			    const char *arg2)
{
	pid_t pid;
	int status;

	/* Call fork(). */
	pid = fork();

	if (pid < 0) {
		/* Failure of fork(). */
		fprintf(stderr, "Can't fork: %s\n", safe_strerror(errno));
		exit(1);
	} else if (pid == 0) {
		/* This is child process. */
		switch (argc) {
		case 0:
			execlp(command, command, (const char *)NULL);
			break;
		case 1:
			execlp(command, command, arg1, (const char *)NULL);
			break;
		case 2:
			execlp(command, command, arg1, arg2,
			       (const char *)NULL);
			break;
		}

		/* When execlp suceed, this part is not executed. */
		fprintf(stderr, "Can't execute %s: %s\n", command,
			safe_strerror(errno));
		exit(1);
	} else {
		/* This is parent. */
		execute_flag = 1;
		wait4(pid, &status, 0, NULL);
		execute_flag = 0;
	}
}

DEFUN (vtysh_ping,
       vtysh_ping_cmd,
       "ping WORD",
       "Send echo messages\n"
       "Ping destination address or hostname\n")
{
	int idx = 1;

	argv_find(argv, argc, "WORD", &idx);
	execute_command("ping", 1, argv[idx]->arg, NULL);
	return CMD_SUCCESS;
}

ALIAS(vtysh_ping, vtysh_ping_ip_cmd, "ping ip WORD",
      "Send echo messages\n"
      "IP echo\n"
      "Ping destination address or hostname\n")

DEFUN (vtysh_traceroute,
       vtysh_traceroute_cmd,
       "traceroute WORD",
       "Trace route to destination\n"
       "Trace route to destination address or hostname\n")
{
	int idx = 1;

	argv_find(argv, argc, "WORD", &idx);
	execute_command("traceroute", 1, argv[idx]->arg, NULL);
	return CMD_SUCCESS;
}

ALIAS(vtysh_traceroute, vtysh_traceroute_ip_cmd, "traceroute ip WORD",
      "Trace route to destination\n"
      "IP trace\n"
      "Trace route to destination address or hostname\n")

DEFUN (vtysh_mtrace,
       vtysh_mtrace_cmd,
       "mtrace WORD [WORD]",
       "Multicast trace route to multicast source\n"
       "Multicast trace route to multicast source address\n"
       "Multicast trace route for multicast group address\n")
{
	if (argc == 2)
		execute_command("mtracebis", 1, argv[1]->arg, NULL);
	else
		execute_command("mtracebis", 2, argv[1]->arg, argv[2]->arg);
	return CMD_SUCCESS;
}

DEFUN (vtysh_ping6,
       vtysh_ping6_cmd,
       "ping ipv6 WORD",
       "Send echo messages\n"
       "IPv6 echo\n"
       "Ping destination address or hostname\n")
{
	execute_command("ping6", 1, argv[2]->arg, NULL);
	return CMD_SUCCESS;
}

DEFUN (vtysh_traceroute6,
       vtysh_traceroute6_cmd,
       "traceroute ipv6 WORD",
       "Trace route to destination\n"
       "IPv6 trace\n"
       "Trace route to destination address or hostname\n")
{
	execute_command("traceroute6", 1, argv[2]->arg, NULL);
	return CMD_SUCCESS;
}

#if defined(HAVE_SHELL_ACCESS)
DEFUN (vtysh_telnet,
       vtysh_telnet_cmd,
       "telnet WORD",
       "Open a telnet connection\n"
       "IP address or hostname of a remote system\n")
{
	execute_command("telnet", 1, argv[1]->arg, NULL);
	return CMD_SUCCESS;
}

DEFUN (vtysh_telnet_port,
       vtysh_telnet_port_cmd,
       "telnet WORD PORT",
       "Open a telnet connection\n"
       "IP address or hostname of a remote system\n"
       "TCP Port number\n")
{
	execute_command("telnet", 2, argv[1]->arg, argv[2]->arg);
	return CMD_SUCCESS;
}

DEFUN (vtysh_ssh,
       vtysh_ssh_cmd,
       "ssh WORD",
       "Open an ssh connection\n"
       "[user@]host\n")
{
	execute_command("ssh", 1, argv[1]->arg, NULL);
	return CMD_SUCCESS;
}

DEFUN (vtysh_start_shell,
       vtysh_start_shell_cmd,
       "start-shell",
       "Start UNIX shell\n")
{
	execute_command("sh", 0, NULL, NULL);
	return CMD_SUCCESS;
}

DEFUN (vtysh_start_bash,
       vtysh_start_bash_cmd,
       "start-shell bash",
       "Start UNIX shell\n"
       "Start bash\n")
{
	execute_command("bash", 0, NULL, NULL);
	return CMD_SUCCESS;
}

DEFUN (vtysh_start_zsh,
       vtysh_start_zsh_cmd,
       "start-shell zsh",
       "Start UNIX shell\n"
       "Start Z shell\n")
{
	execute_command("zsh", 0, NULL, NULL);
	return CMD_SUCCESS;
}
#endif

DEFUN (config_list,
       config_list_cmd,
       "list [permutations]",
       "Print command list\n"
       "Print all possible command permutations\n")
{
	return cmd_list_cmds(vty, argc == 2);
}

DEFUN (vtysh_output_file,
       vtysh_output_file_cmd,
       "output file FILE",
       "Direct vtysh output to file\n"
       "Direct vtysh output to file\n"
       "Path to dump output to\n")
{
	const char *path = argv[argc - 1]->arg;
	vty->of = fopen(path, "a");
	if (!vty->of) {
		vty_out(vty, "Failed to open file '%s': %s\n", path,
			safe_strerror(errno));
		vty->of = stdout;
	}
	return CMD_SUCCESS;
}

DEFUN (no_vtysh_output_file,
       no_vtysh_output_file_cmd,
       "no output file [FILE]",
       NO_STR
       "Direct vtysh output to file\n"
       "Direct vtysh output to file\n"
       "Path to dump output to\n")
{
	if (vty->of != stdout) {
		fclose(vty->of);
		vty->of = stdout;
	}
	return CMD_SUCCESS;
}

DEFUN(find,
      find_cmd,
      "find REGEX...",
      "Find CLI command matching a regular expression\n"
      "Search pattern (POSIX regex)\n")
{
	return cmd_find_cmds(vty, argv, argc);
}

DEFUN_HIDDEN(show_cli_graph_vtysh,
	     show_cli_graph_vtysh_cmd,
	     "show cli graph",
	     SHOW_STR
	     "CLI reflection\n"
	     "Dump current command space as DOT graph\n")
{
	struct cmd_node *cn = vector_slot(cmdvec, vty->node);
	char *dot = cmd_graph_dump_dot(cn->cmdgraph);

	vty_out(vty, "%s\n", dot);
	XFREE(MTYPE_TMP, dot);
	return CMD_SUCCESS;
}

static void vtysh_install_default(enum node_type node)
{
	_install_element(node, &config_list_cmd);
	_install_element(node, &find_cmd);
	_install_element(node, &show_cli_graph_vtysh_cmd);
	_install_element(node, &vtysh_output_file_cmd);
	_install_element(node, &no_vtysh_output_file_cmd);
}

/* Making connection to protocol daemon. */
static int vtysh_connect(struct vtysh_client *vclient)
{
	int ret;
	int sock, len;
	struct sockaddr_un addr;
	struct stat s_stat;
	const char *path;

	if (!vclient->path[0])
		snprintf(vclient->path, sizeof(vclient->path), "%s/%s.vty",
			 vtydir, vclient->name);
	path = vclient->path;

	/* Stat socket to see if we have permission to access it. */
	ret = stat(path, &s_stat);
	if (ret < 0 && errno != ENOENT) {
		fprintf(stderr, "vtysh_connect(%s): stat = %s\n", path,
			safe_strerror(errno));
		exit(1);
	}

	if (ret >= 0) {
		if (!S_ISSOCK(s_stat.st_mode)) {
			fprintf(stderr, "vtysh_connect(%s): Not a socket\n",
				path);
			exit(1);
		}
	}

	sock = socket(AF_UNIX, SOCK_STREAM, 0);
	if (sock < 0) {
#ifdef DEBUG
		fprintf(stderr, "vtysh_connect(%s): socket = %s\n", path,
			safe_strerror(errno));
#endif /* DEBUG */
		return -1;
	}

	memset(&addr, 0, sizeof(struct sockaddr_un));
	addr.sun_family = AF_UNIX;
	strlcpy(addr.sun_path, path, sizeof(addr.sun_path));
#ifdef HAVE_STRUCT_SOCKADDR_UN_SUN_LEN
	len = addr.sun_len = SUN_LEN(&addr);
#else
	len = sizeof(addr.sun_family) + strlen(addr.sun_path);
#endif /* HAVE_STRUCT_SOCKADDR_UN_SUN_LEN */

	ret = connect(sock, (struct sockaddr *)&addr, len);
	if (ret < 0) {
#ifdef DEBUG
		fprintf(stderr, "vtysh_connect(%s): connect = %s\n", path,
			safe_strerror(errno));
#endif /* DEBUG */
		close(sock);
		return -1;
	}
	vclient->fd = sock;

	return 0;
}

static int vtysh_reconnect(struct vtysh_client *vclient)
{
	int ret;

	fprintf(stderr, "Warning: connecting to %s...", vclient->name);
	ret = vtysh_connect(vclient);
	if (ret < 0) {
		fprintf(stderr, "failed!\n");
		return ret;
	}
	fprintf(stderr, "success!\n");
	if (vtysh_client_execute(vclient, "enable") < 0)
		return -1;
	return vtysh_execute_no_pager("end");
}

/* Return true if str ends with suffix, else return false */
static int ends_with(const char *str, const char *suffix)
{
	if (!str || !suffix)
		return 0;
	size_t lenstr = strlen(str);
	size_t lensuffix = strlen(suffix);
	if (lensuffix > lenstr)
		return 0;
	return strncmp(str + lenstr - lensuffix, suffix, lensuffix) == 0;
}

static void vtysh_client_sorted_insert(struct vtysh_client *head_client,
				       struct vtysh_client *client)
{
	struct vtysh_client *prev_node, *current_node;

	prev_node = head_client;
	current_node = head_client->next;
	while (current_node) {
		if (strcmp(current_node->path, client->path) > 0)
			break;

		prev_node = current_node;
		current_node = current_node->next;
	}
	client->next = current_node;
	prev_node->next = client;
}

#define MAXIMUM_INSTANCES 10

static void vtysh_update_all_instances(struct vtysh_client *head_client)
{
	struct vtysh_client *client;
	DIR *dir;
	struct dirent *file;
	int n = 0;

	if (head_client->flag != VTYSH_OSPFD)
		return;

	/* ls vty_sock_dir and look for all files ending in .vty */
	dir = opendir(vtydir);
	if (dir) {
		while ((file = readdir(dir)) != NULL) {
			if (frrstr_startswith(file->d_name, "ospfd-")
			    && ends_with(file->d_name, ".vty")) {
				if (n == MAXIMUM_INSTANCES) {
					fprintf(stderr,
						"Parsing %s, client limit(%d) reached!\n",
						vtydir, n);
					break;
				}
				client = (struct vtysh_client *)malloc(
					sizeof(struct vtysh_client));
				client->fd = -1;
				client->name = "ospfd";
				client->flag = VTYSH_OSPFD;
				snprintf(client->path, sizeof(client->path),
					 "%s/%s", vtydir, file->d_name);
				client->next = NULL;
				vtysh_client_sorted_insert(head_client, client);
				n++;
			}
		}
		closedir(dir);
	}
}

static int vtysh_connect_all_instances(struct vtysh_client *head_client)
{
	struct vtysh_client *client;
	int rc = 0;

	vtysh_update_all_instances(head_client);

	client = head_client->next;
	while (client) {
		if (vtysh_connect(client) == 0)
			rc++;
		client = client->next;
	}

	return rc;
}

int vtysh_connect_all(const char *daemon_name)
{
	unsigned int i;
	int rc = 0;
	int matches = 0;

	for (i = 0; i < array_size(vtysh_client); i++) {
		if (!daemon_name
		    || !strcmp(daemon_name, vtysh_client[i].name)) {
			matches++;
			if (vtysh_connect(&vtysh_client[i]) == 0)
				rc++;

			rc += vtysh_connect_all_instances(&vtysh_client[i]);
		}
	}
	if (!matches)
		fprintf(stderr, "Error: no daemons match name %s!\n",
			daemon_name);
	return rc;
}

/* To disable readline's filename completion. */
static char *vtysh_completion_entry_function(const char *ignore,
					     int invoking_key)
{
	return NULL;
}

void vtysh_readline_init(void)
{
	/* readline related settings. */
	char *disable_bracketed_paste =
		XSTRDUP(MTYPE_TMP, "set enable-bracketed-paste off");

	rl_initialize();
	rl_parse_and_bind(disable_bracketed_paste);
	rl_bind_key('?', (rl_command_func_t *)vtysh_rl_describe);
	rl_completion_entry_function = vtysh_completion_entry_function;
	rl_attempted_completion_function = new_completion;

	XFREE(MTYPE_TMP, disable_bracketed_paste);
}

char *vtysh_prompt(void)
{
	static char buf[512];

	snprintf(buf, sizeof(buf), cmd_prompt(vty->node), cmd_hostname_get());
	return buf;
}

static void vtysh_ac_line(void *arg, const char *line)
{
	vector comps = arg;
	size_t i;
	for (i = 0; i < vector_active(comps); i++)
		if (!strcmp(line, (char *)vector_slot(comps, i)))
			return;
	vector_set(comps, XSTRDUP(MTYPE_COMPLETION, line));
}

static void vtysh_autocomplete(vector comps, struct cmd_token *token)
{
	char accmd[256];
	size_t i;

	snprintf(accmd, sizeof(accmd), "autocomplete %d %s %s", token->type,
		 token->text, token->varname ? token->varname : "-");

	vty->of_saved = vty->of;
	vty->of = NULL;
	for (i = 0; i < array_size(vtysh_client); i++)
		vtysh_client_run_all(&vtysh_client[i], accmd, 1, vtysh_ac_line,
				     comps);
	vty->of = vty->of_saved;
}

static const struct cmd_variable_handler vtysh_var_handler[] = {
	{/* match all */
	 .tokenname = NULL,
	 .varname = NULL,
	 .completions = vtysh_autocomplete},
	{.completions = NULL}};

void vtysh_uninit(void)
{
	if (vty->of != stdout)
		fclose(vty->of);
}

void vtysh_init_vty(void)
{
	cmd_defer_tree(true);

	/* Make vty structure. */
	vty = vty_new();
	vty->type = VTY_SHELL;
	vty->node = VIEW_NODE;

	/* set default output */
	vty->of = stdout;
	vtysh_pager_envdef(false);

	/* Initialize commands. */
	cmd_init(0);
	cmd_variable_handler_register(vtysh_var_handler);

	/* bgpd */
#ifdef HAVE_BGPD
	install_node(&bgp_node);
	install_element(CONFIG_NODE, &router_bgp_cmd);
	install_element(BGP_NODE, &vtysh_exit_bgpd_cmd);
	install_element(BGP_NODE, &vtysh_quit_bgpd_cmd);
	install_element(BGP_NODE, &vtysh_end_all_cmd);

	install_node(&bgp_vpnv4_node);
	install_element(BGP_NODE, &address_family_ipv4_vpn_cmd);
#ifdef KEEP_OLD_VPN_COMMANDS
	install_element(BGP_NODE, &address_family_vpnv4_cmd);
#endif /* KEEP_OLD_VPN_COMMANDS */
	install_element(BGP_VPNV4_NODE, &vtysh_exit_bgpd_cmd);
	install_element(BGP_VPNV4_NODE, &vtysh_quit_bgpd_cmd);
	install_element(BGP_VPNV4_NODE, &vtysh_end_all_cmd);
	install_element(BGP_VPNV4_NODE, &exit_address_family_cmd);

	install_node(&bgp_vpnv6_node);
	install_element(BGP_NODE, &address_family_ipv6_vpn_cmd);
#ifdef KEEP_OLD_VPN_COMMANDS
	install_element(BGP_NODE, &address_family_vpnv6_cmd);
#endif /* KEEP_OLD_VPN_COMMANDS */
	install_element(BGP_VPNV6_NODE, &vtysh_exit_bgpd_cmd);
	install_element(BGP_VPNV6_NODE, &vtysh_quit_bgpd_cmd);
	install_element(BGP_VPNV6_NODE, &vtysh_end_all_cmd);
	install_element(BGP_VPNV6_NODE, &exit_address_family_cmd);

	install_node(&bgp_flowspecv4_node);
	install_element(BGP_NODE, &address_family_flowspecv4_cmd);
	install_element(BGP_FLOWSPECV4_NODE, &vtysh_exit_bgpd_cmd);
	install_element(BGP_FLOWSPECV4_NODE, &vtysh_quit_bgpd_cmd);
	install_element(BGP_FLOWSPECV4_NODE, &vtysh_end_all_cmd);
	install_element(BGP_FLOWSPECV4_NODE, &exit_address_family_cmd);

	install_node(&bgp_flowspecv6_node);
	install_element(BGP_NODE, &address_family_flowspecv6_cmd);
	install_element(BGP_FLOWSPECV6_NODE, &vtysh_exit_bgpd_cmd);
	install_element(BGP_FLOWSPECV6_NODE, &vtysh_quit_bgpd_cmd);
	install_element(BGP_FLOWSPECV6_NODE, &vtysh_end_all_cmd);
	install_element(BGP_FLOWSPECV6_NODE, &exit_address_family_cmd);

	install_node(&bgp_ipv4_node);
	install_element(BGP_NODE, &address_family_ipv4_cmd);
	install_element(BGP_IPV4_NODE, &vtysh_exit_bgpd_cmd);
	install_element(BGP_IPV4_NODE, &vtysh_quit_bgpd_cmd);
	install_element(BGP_IPV4_NODE, &vtysh_end_all_cmd);
	install_element(BGP_IPV4_NODE, &exit_address_family_cmd);

	install_node(&bgp_ipv4m_node);
	install_element(BGP_NODE, &address_family_ipv4_multicast_cmd);
	install_element(BGP_IPV4M_NODE, &vtysh_exit_bgpd_cmd);
	install_element(BGP_IPV4M_NODE, &vtysh_quit_bgpd_cmd);
	install_element(BGP_IPV4M_NODE, &vtysh_end_all_cmd);
	install_element(BGP_IPV4M_NODE, &exit_address_family_cmd);

	install_node(&bgp_ipv4l_node);
	install_element(BGP_NODE, &address_family_ipv4_labeled_unicast_cmd);
	install_element(BGP_IPV4L_NODE, &vtysh_exit_bgpd_cmd);
	install_element(BGP_IPV4L_NODE, &vtysh_quit_bgpd_cmd);
	install_element(BGP_IPV4L_NODE, &vtysh_end_all_cmd);
	install_element(BGP_IPV4L_NODE, &exit_address_family_cmd);

	install_node(&bgp_ipv6_node);
	install_element(BGP_NODE, &address_family_ipv6_cmd);
	install_element(BGP_IPV6_NODE, &vtysh_exit_bgpd_cmd);
	install_element(BGP_IPV6_NODE, &vtysh_quit_bgpd_cmd);
	install_element(BGP_IPV6_NODE, &vtysh_end_all_cmd);
	install_element(BGP_IPV6_NODE, &exit_address_family_cmd);

	install_node(&bgp_ipv6m_node);
	install_element(BGP_NODE, &address_family_ipv6_multicast_cmd);
	install_element(BGP_IPV6M_NODE, &vtysh_exit_bgpd_cmd);
	install_element(BGP_IPV6M_NODE, &vtysh_quit_bgpd_cmd);
	install_element(BGP_IPV6M_NODE, &vtysh_end_all_cmd);
	install_element(BGP_IPV6M_NODE, &exit_address_family_cmd);

	install_node(&bgp_ipv6l_node);
	install_element(BGP_NODE, &address_family_ipv6_labeled_unicast_cmd);
	install_element(BGP_IPV6L_NODE, &vtysh_exit_bgpd_cmd);
	install_element(BGP_IPV6L_NODE, &vtysh_quit_bgpd_cmd);
	install_element(BGP_IPV6L_NODE, &vtysh_end_all_cmd);
	install_element(BGP_IPV6L_NODE, &exit_address_family_cmd);

#if defined(ENABLE_BGP_VNC)
	install_node(&bgp_vrf_policy_node);
	install_element(BGP_NODE, &vnc_vrf_policy_cmd);
	install_element(BGP_VRF_POLICY_NODE, &vtysh_exit_bgpd_cmd);
	install_element(BGP_VRF_POLICY_NODE, &vtysh_quit_bgpd_cmd);
	install_element(BGP_VRF_POLICY_NODE, &vtysh_end_all_cmd);
	install_element(BGP_VRF_POLICY_NODE, &exit_vrf_policy_cmd);

	install_node(&bgp_vnc_defaults_node);
	install_element(BGP_NODE, &vnc_defaults_cmd);
	install_element(BGP_VNC_DEFAULTS_NODE, &vtysh_exit_bgpd_cmd);
	install_element(BGP_VNC_DEFAULTS_NODE, &vtysh_quit_bgpd_cmd);
	install_element(BGP_VNC_DEFAULTS_NODE, &vtysh_end_all_cmd);
	install_element(BGP_VNC_DEFAULTS_NODE, &exit_vnc_config_cmd);

	install_node(&bgp_vnc_nve_group_node);
	install_element(BGP_NODE, &vnc_nve_group_cmd);
	install_element(BGP_VNC_NVE_GROUP_NODE, &vtysh_exit_bgpd_cmd);
	install_element(BGP_VNC_NVE_GROUP_NODE, &vtysh_quit_bgpd_cmd);
	install_element(BGP_VNC_NVE_GROUP_NODE, &vtysh_end_all_cmd);
	install_element(BGP_VNC_NVE_GROUP_NODE, &exit_vnc_config_cmd);

	install_node(&bgp_vnc_l2_group_node);
	install_element(BGP_NODE, &vnc_l2_group_cmd);
	install_element(BGP_VNC_L2_GROUP_NODE, &vtysh_exit_bgpd_cmd);
	install_element(BGP_VNC_L2_GROUP_NODE, &vtysh_quit_bgpd_cmd);
	install_element(BGP_VNC_L2_GROUP_NODE, &vtysh_end_all_cmd);
	install_element(BGP_VNC_L2_GROUP_NODE, &exit_vnc_config_cmd);
#endif

	install_node(&bgp_evpn_node);
	install_element(BGP_NODE, &address_family_evpn_cmd);
	install_element(BGP_EVPN_NODE, &vtysh_quit_bgpd_cmd);
	install_element(BGP_EVPN_NODE, &vtysh_exit_bgpd_cmd);
	install_element(BGP_EVPN_NODE, &vtysh_end_all_cmd);
	install_element(BGP_EVPN_NODE, &exit_address_family_cmd);

	install_node(&bgp_evpn_vni_node);
	install_element(BGP_EVPN_NODE, &bgp_evpn_vni_cmd);
	install_element(BGP_EVPN_VNI_NODE, &vtysh_exit_bgpd_cmd);
	install_element(BGP_EVPN_VNI_NODE, &vtysh_quit_bgpd_cmd);
	install_element(BGP_EVPN_VNI_NODE, &vtysh_end_all_cmd);
	install_element(BGP_EVPN_VNI_NODE, &exit_vni_cmd);

	install_node(&rpki_node);
	install_element(CONFIG_NODE, &rpki_cmd);
	install_element(RPKI_NODE, &rpki_exit_cmd);
	install_element(RPKI_NODE, &rpki_quit_cmd);
	install_element(RPKI_NODE, &vtysh_end_all_cmd);

	install_node(&bmp_node);
	install_element(BGP_NODE, &bmp_targets_cmd);
	install_element(BMP_NODE, &bmp_exit_cmd);
	install_element(BMP_NODE, &bmp_quit_cmd);
	install_element(BMP_NODE, &vtysh_end_all_cmd);

	install_node(&bgp_srv6_node);
	install_element(BGP_NODE, &bgp_srv6_cmd);
	install_element(BGP_SRV6_NODE, &exit_bgp_srv6_cmd);
	install_element(BGP_SRV6_NODE, &quit_bgp_srv6_cmd);
	install_element(BGP_SRV6_NODE, &vtysh_end_all_cmd);
#endif /* HAVE_BGPD */

	/* ripd */
	install_node(&rip_node);
#ifdef HAVE_RIPD
	install_element(CONFIG_NODE, &router_rip_cmd);
	install_element(RIP_NODE, &vtysh_exit_ripd_cmd);
	install_element(RIP_NODE, &vtysh_quit_ripd_cmd);
	install_element(RIP_NODE, &vtysh_end_all_cmd);
#endif /* HAVE_RIPD */

	/* ripngd */
	install_node(&ripng_node);
#ifdef HAVE_RIPNGD
	install_element(CONFIG_NODE, &router_ripng_cmd);
	install_element(RIPNG_NODE, &vtysh_exit_ripngd_cmd);
	install_element(RIPNG_NODE, &vtysh_quit_ripngd_cmd);
	install_element(RIPNG_NODE, &vtysh_end_all_cmd);
#endif /* HAVE_RIPNGD */

	/* ospfd */
#ifdef HAVE_OSPFD
	install_node(&ospf_node);
	install_element(CONFIG_NODE, &router_ospf_cmd);
	install_element(OSPF_NODE, &vtysh_exit_ospfd_cmd);
	install_element(OSPF_NODE, &vtysh_quit_ospfd_cmd);
	install_element(OSPF_NODE, &vtysh_end_all_cmd);
#endif /* HAVE_OSPFD */

	/* ospf6d */
#ifdef HAVE_OSPF6D
	install_node(&ospf6_node);
	install_element(CONFIG_NODE, &router_ospf6_cmd);
	install_element(OSPF6_NODE, &vtysh_exit_ospf6d_cmd);
	install_element(OSPF6_NODE, &vtysh_quit_ospf6d_cmd);
	install_element(OSPF6_NODE, &vtysh_end_all_cmd);
#endif /* HAVE_OSPF6D */

	/* ldpd */
#if defined(HAVE_LDPD)
	install_node(&ldp_node);
	install_element(CONFIG_NODE, &ldp_mpls_ldp_cmd);
	install_element(LDP_NODE, &vtysh_exit_ldpd_cmd);
	install_element(LDP_NODE, &vtysh_quit_ldpd_cmd);
	install_element(LDP_NODE, &vtysh_end_all_cmd);

	install_node(&ldp_ipv4_node);
	install_element(LDP_NODE, &ldp_address_family_ipv4_cmd);
	install_element(LDP_IPV4_NODE, &vtysh_exit_ldpd_cmd);
	install_element(LDP_IPV4_NODE, &vtysh_quit_ldpd_cmd);
	install_element(LDP_IPV4_NODE, &ldp_exit_address_family_cmd);
	install_element(LDP_IPV4_NODE, &vtysh_end_all_cmd);

	install_node(&ldp_ipv6_node);
	install_element(LDP_NODE, &ldp_address_family_ipv6_cmd);
	install_element(LDP_IPV6_NODE, &vtysh_exit_ldpd_cmd);
	install_element(LDP_IPV6_NODE, &vtysh_quit_ldpd_cmd);
	install_element(LDP_IPV6_NODE, &ldp_exit_address_family_cmd);
	install_element(LDP_IPV6_NODE, &vtysh_end_all_cmd);

	install_node(&ldp_ipv4_iface_node);
	install_element(LDP_IPV4_NODE, &ldp_interface_ifname_cmd);
	install_element(LDP_IPV4_IFACE_NODE, &vtysh_exit_ldpd_cmd);
	install_element(LDP_IPV4_IFACE_NODE, &vtysh_quit_ldpd_cmd);
	install_element(LDP_IPV4_IFACE_NODE, &vtysh_end_all_cmd);

	install_node(&ldp_ipv6_iface_node);
	install_element(LDP_IPV6_NODE, &ldp_interface_ifname_cmd);
	install_element(LDP_IPV6_IFACE_NODE, &vtysh_exit_ldpd_cmd);
	install_element(LDP_IPV6_IFACE_NODE, &vtysh_quit_ldpd_cmd);
	install_element(LDP_IPV6_IFACE_NODE, &vtysh_end_all_cmd);

	install_node(&ldp_l2vpn_node);
	install_element(CONFIG_NODE, &ldp_l2vpn_word_type_vpls_cmd);
	install_element(LDP_L2VPN_NODE, &vtysh_exit_ldpd_cmd);
	install_element(LDP_L2VPN_NODE, &vtysh_quit_ldpd_cmd);
	install_element(LDP_L2VPN_NODE, &vtysh_end_all_cmd);

	install_node(&ldp_pseudowire_node);
	install_element(LDP_L2VPN_NODE, &ldp_member_pseudowire_ifname_cmd);
	install_element(LDP_PSEUDOWIRE_NODE, &vtysh_exit_ldpd_cmd);
	install_element(LDP_PSEUDOWIRE_NODE, &vtysh_quit_ldpd_cmd);
	install_element(LDP_PSEUDOWIRE_NODE, &vtysh_end_all_cmd);
#endif

	/* eigrpd */
#ifdef HAVE_EIGRPD
	install_node(&eigrp_node);
	install_element(CONFIG_NODE, &router_eigrp_cmd);
	install_element(EIGRP_NODE, &vtysh_exit_eigrpd_cmd);
	install_element(EIGRP_NODE, &vtysh_quit_eigrpd_cmd);
	install_element(EIGRP_NODE, &vtysh_end_all_cmd);
#endif /* HAVE_EIGRPD */

	/* babeld */
#ifdef HAVE_BABELD
	install_node(&babel_node);
	install_element(CONFIG_NODE, &router_babel_cmd);
	install_element(BABEL_NODE, &vtysh_exit_babeld_cmd);
	install_element(BABEL_NODE, &vtysh_quit_babeld_cmd);
	install_element(BABEL_NODE, &vtysh_end_all_cmd);
#endif /* HAVE_BABELD */

	/* isisd */
#ifdef HAVE_ISISD
	install_node(&isis_node);
	install_element(CONFIG_NODE, &router_isis_cmd);
	install_element(ISIS_NODE, &vtysh_exit_isisd_cmd);
	install_element(ISIS_NODE, &vtysh_quit_isisd_cmd);
	install_element(ISIS_NODE, &vtysh_end_all_cmd);
#endif /* HAVE_ISISD */

	/* fabricd */
#ifdef HAVE_FABRICD
	install_node(&openfabric_node);
	install_element(CONFIG_NODE, &router_openfabric_cmd);
	install_element(OPENFABRIC_NODE, &vtysh_exit_fabricd_cmd);
	install_element(OPENFABRIC_NODE, &vtysh_quit_fabricd_cmd);
	install_element(OPENFABRIC_NODE, &vtysh_end_all_cmd);
#endif /* HAVE_FABRICD */

	/* pbrd */
#ifdef HAVE_PBRD
	install_node(&pbr_map_node);
	install_element(CONFIG_NODE, &vtysh_pbr_map_cmd);
	install_element(CONFIG_NODE, &vtysh_no_pbr_map_cmd);
	install_element(PBRMAP_NODE, &vtysh_exit_pbr_map_cmd);
	install_element(PBRMAP_NODE, &vtysh_quit_pbr_map_cmd);
	install_element(PBRMAP_NODE, &vtysh_end_all_cmd);
#endif /* HAVE_PBRD */

	/* bfdd */
#if HAVE_BFDD > 0
	install_node(&bfd_node);
	install_element(CONFIG_NODE, &bfd_enter_cmd);
	install_element(BFD_NODE, &vtysh_exit_bfdd_cmd);
	install_element(BFD_NODE, &vtysh_quit_bfdd_cmd);
	install_element(BFD_NODE, &vtysh_end_all_cmd);

	install_node(&bfd_peer_node);
	install_element(BFD_NODE, &bfd_peer_enter_cmd);
	install_element(BFD_PEER_NODE, &vtysh_exit_bfdd_cmd);
	install_element(BFD_PEER_NODE, &vtysh_quit_bfdd_cmd);
	install_element(BFD_PEER_NODE, &vtysh_end_all_cmd);

	install_node(&bfd_profile_node);
	install_element(BFD_NODE, &bfd_profile_enter_cmd);
	install_element(BFD_PROFILE_NODE, &vtysh_exit_bfdd_cmd);
	install_element(BFD_PROFILE_NODE, &vtysh_quit_bfdd_cmd);
	install_element(BFD_PROFILE_NODE, &vtysh_end_all_cmd);
#endif /* HAVE_BFDD */

	install_node(&segment_routing_node);
	install_element(CONFIG_NODE, &segment_routing_cmd);
	install_element(SEGMENT_ROUTING_NODE, &vtysh_exit_sr_cmd);
	install_element(SEGMENT_ROUTING_NODE, &vtysh_quit_sr_cmd);
	install_element(SEGMENT_ROUTING_NODE, &vtysh_end_all_cmd);

#if defined(HAVE_PATHD)
	install_node(&sr_traffic_eng_node);
	install_node(&srte_segment_list_node);
	install_node(&srte_policy_node);
	install_node(&srte_candidate_dyn_node);

	install_element(SR_TRAFFIC_ENG_NODE, &vtysh_exit_pathd_cmd);
	install_element(SR_TRAFFIC_ENG_NODE, &vtysh_quit_pathd_cmd);
	install_element(SR_SEGMENT_LIST_NODE, &vtysh_exit_pathd_cmd);
	install_element(SR_SEGMENT_LIST_NODE, &vtysh_quit_pathd_cmd);
	install_element(SR_POLICY_NODE, &vtysh_exit_pathd_cmd);
	install_element(SR_POLICY_NODE, &vtysh_quit_pathd_cmd);
	install_element(SR_CANDIDATE_DYN_NODE, &vtysh_exit_pathd_cmd);
	install_element(SR_CANDIDATE_DYN_NODE, &vtysh_quit_pathd_cmd);


	install_element(SR_TRAFFIC_ENG_NODE, &vtysh_end_all_cmd);
	install_element(SR_SEGMENT_LIST_NODE, &vtysh_end_all_cmd);
	install_element(SR_POLICY_NODE, &vtysh_end_all_cmd);
	install_element(SR_CANDIDATE_DYN_NODE, &vtysh_end_all_cmd);

	install_element(SEGMENT_ROUTING_NODE, &sr_traffic_eng_cmd);
	install_element(SR_TRAFFIC_ENG_NODE, &srte_segment_list_cmd);
	install_element(SR_TRAFFIC_ENG_NODE, &srte_policy_cmd);
	install_element(SR_POLICY_NODE, &srte_policy_candidate_dyn_path_cmd);

	install_node(&pcep_node);
	install_node(&pcep_pcc_node);
	install_node(&pcep_pce_node);
	install_node(&pcep_pce_config_node);

	install_element(PCEP_NODE, &vtysh_exit_pathd_cmd);
	install_element(PCEP_NODE, &vtysh_quit_pathd_cmd);
	install_element(PCEP_PCC_NODE, &vtysh_exit_pathd_cmd);
	install_element(PCEP_PCC_NODE, &vtysh_quit_pathd_cmd);
	install_element(PCEP_PCE_NODE, &vtysh_exit_pathd_cmd);
	install_element(PCEP_PCE_NODE, &vtysh_quit_pathd_cmd);
	install_element(PCEP_PCE_CONFIG_NODE, &vtysh_exit_pathd_cmd);
	install_element(PCEP_PCE_CONFIG_NODE, &vtysh_quit_pathd_cmd);

	install_element(PCEP_NODE, &vtysh_end_all_cmd);
	install_element(PCEP_PCC_NODE, &vtysh_end_all_cmd);
	install_element(PCEP_PCE_NODE, &vtysh_end_all_cmd);
	install_element(PCEP_PCE_CONFIG_NODE, &vtysh_end_all_cmd);

	install_element(SR_TRAFFIC_ENG_NODE, &pcep_cmd);
	install_element(PCEP_NODE, &pcep_cli_pcc_cmd);
	install_element(PCEP_NODE, &pcep_cli_pcep_pce_config_cmd);
	install_element(PCEP_NODE, &pcep_cli_pce_cmd);

#endif /* HAVE_PATHD */

	/* keychain */
	install_node(&keychain_node);
	install_element(CONFIG_NODE, &key_chain_cmd);
	install_element(KEYCHAIN_NODE, &key_chain_cmd);
	install_element(KEYCHAIN_NODE, &vtysh_exit_keys_cmd);
	install_element(KEYCHAIN_NODE, &vtysh_quit_keys_cmd);
	install_element(KEYCHAIN_NODE, &vtysh_end_all_cmd);

	install_node(&keychain_key_node);
	install_element(KEYCHAIN_NODE, &key_cmd);
	install_element(KEYCHAIN_KEY_NODE, &key_chain_cmd);
	install_element(KEYCHAIN_KEY_NODE, &vtysh_exit_keys_cmd);
	install_element(KEYCHAIN_KEY_NODE, &vtysh_quit_keys_cmd);
	install_element(KEYCHAIN_KEY_NODE, &vtysh_end_all_cmd);

	/* nexthop-group */
	install_node(&nh_group_node);
	install_element(CONFIG_NODE, &vtysh_nexthop_group_cmd);
	install_element(CONFIG_NODE, &vtysh_no_nexthop_group_cmd);
	install_element(NH_GROUP_NODE, &vtysh_end_all_cmd);
	install_element(NH_GROUP_NODE, &vtysh_exit_nexthop_group_cmd);
	install_element(NH_GROUP_NODE, &vtysh_quit_nexthop_group_cmd);

	/* zebra and all */
	install_node(&zebra_node);

	install_node(&interface_node);
	install_element(CONFIG_NODE, &vtysh_interface_cmd);
	install_element(INTERFACE_NODE, &vtysh_end_all_cmd);
	install_element(INTERFACE_NODE, &vtysh_exit_interface_cmd);
	install_element(INTERFACE_NODE, &vtysh_quit_interface_cmd);

	install_node(&link_params_node);
	install_element(INTERFACE_NODE, &vtysh_link_params_cmd);
	install_element(LINK_PARAMS_NODE, &exit_link_params_cmd);
	install_element(LINK_PARAMS_NODE, &vtysh_end_all_cmd);
	install_element(LINK_PARAMS_NODE, &vtysh_exit_link_params_cmd);
	install_element(LINK_PARAMS_NODE, &vtysh_quit_link_params_cmd);

	install_node(&pw_node);
	install_element(CONFIG_NODE, &vtysh_pseudowire_cmd);
	install_element(PW_NODE, &vtysh_end_all_cmd);
	install_element(PW_NODE, &vtysh_exit_pseudowire_cmd);
	install_element(PW_NODE, &vtysh_quit_pseudowire_cmd);

	install_node(&vrf_node);
	install_element(CONFIG_NODE, &vtysh_vrf_cmd);
	install_element(VRF_NODE, &exit_vrf_config_cmd);
	install_element(VRF_NODE, &vtysh_end_all_cmd);
	install_element(VRF_NODE, &vtysh_exit_vrf_cmd);
	install_element(VRF_NODE, &vtysh_quit_vrf_cmd);

	install_node(&rmap_node);
	install_element(CONFIG_NODE, &vtysh_route_map_cmd);
	install_element(RMAP_NODE, &vtysh_exit_rmap_cmd);
	install_element(RMAP_NODE, &vtysh_quit_rmap_cmd);
	install_element(RMAP_NODE, &vtysh_end_all_cmd);

	install_node(&vty_node);
	install_element(CONFIG_NODE, &vtysh_line_vty_cmd);
	install_element(VTY_NODE, &vtysh_exit_line_vty_cmd);
	install_element(VTY_NODE, &vtysh_quit_line_vty_cmd);
	install_element(VTY_NODE, &vtysh_end_all_cmd);


	struct cmd_node *node;
	for (unsigned int i = 0; i < vector_active(cmdvec); i++) {
		node = vector_slot(cmdvec, i);
		if (!node || node->node == VIEW_NODE)
			continue;
		vtysh_install_default(node->node);
	}

	/* vtysh */

	if (!user_mode)
		install_element(VIEW_NODE, &vtysh_enable_cmd);
	install_element(ENABLE_NODE, &vtysh_config_terminal_cmd);
	install_element(ENABLE_NODE, &vtysh_disable_cmd);

	/* "exit" command. */
	install_element(VIEW_NODE, &vtysh_exit_all_cmd);
	install_element(CONFIG_NODE, &vtysh_exit_all_cmd);
	install_element(VIEW_NODE, &vtysh_quit_all_cmd);
	install_element(CONFIG_NODE, &vtysh_quit_all_cmd);

	/* "end" command. */
	install_element(CONFIG_NODE, &vtysh_end_all_cmd);
	install_element(ENABLE_NODE, &vtysh_end_all_cmd);

	/* SRv6 Data-plane */
	install_node(&srv6_node);
	install_element(SEGMENT_ROUTING_NODE, &srv6_cmd);
	install_element(SRV6_NODE, &srv6_locators_cmd);
	install_element(SRV6_NODE, &exit_srv6_config_cmd);
	install_element(SRV6_NODE, &vtysh_end_all_cmd);

	install_node(&srv6_locs_node);
	install_element(SRV6_LOCS_NODE, &srv6_locator_cmd);
	install_element(SRV6_LOCS_NODE, &exit_srv6_locs_config_cmd);
	install_element(SRV6_LOCS_NODE, &vtysh_end_all_cmd);

	install_node(&srv6_loc_node);
	install_element(SRV6_LOC_NODE, &exit_srv6_loc_config_cmd);
	install_element(SRV6_LOC_NODE, &vtysh_end_all_cmd);

	install_element(ENABLE_NODE, &vtysh_show_running_config_cmd);
	install_element(ENABLE_NODE, &vtysh_copy_running_config_cmd);
	install_element(ENABLE_NODE, &vtysh_copy_to_running_cmd);

	/* "write terminal" command. */
	install_element(ENABLE_NODE, &vtysh_write_terminal_cmd);

	install_element(CONFIG_NODE, &vtysh_integrated_config_cmd);
	install_element(CONFIG_NODE, &no_vtysh_integrated_config_cmd);

	/* "write memory" command. */
	install_element(ENABLE_NODE, &vtysh_write_memory_cmd);

	install_element(CONFIG_NODE, &vtysh_terminal_paginate_cmd);
	install_element(VIEW_NODE, &vtysh_terminal_paginate_cmd);
	install_element(VIEW_NODE, &vtysh_terminal_length_cmd);
	install_element(VIEW_NODE, &vtysh_terminal_no_length_cmd);
	install_element(VIEW_NODE, &vtysh_show_daemons_cmd);

	install_element(VIEW_NODE, &vtysh_ping_cmd);
	install_element(VIEW_NODE, &vtysh_ping_ip_cmd);
	install_element(VIEW_NODE, &vtysh_traceroute_cmd);
	install_element(VIEW_NODE, &vtysh_traceroute_ip_cmd);
	install_element(VIEW_NODE, &vtysh_mtrace_cmd);
	install_element(VIEW_NODE, &vtysh_ping6_cmd);
	install_element(VIEW_NODE, &vtysh_traceroute6_cmd);
#if defined(HAVE_SHELL_ACCESS)
	install_element(VIEW_NODE, &vtysh_telnet_cmd);
	install_element(VIEW_NODE, &vtysh_telnet_port_cmd);
	install_element(VIEW_NODE, &vtysh_ssh_cmd);
#endif
#if defined(HAVE_SHELL_ACCESS)
	install_element(ENABLE_NODE, &vtysh_start_shell_cmd);
	install_element(ENABLE_NODE, &vtysh_start_bash_cmd);
	install_element(ENABLE_NODE, &vtysh_start_zsh_cmd);
#endif

	/* debugging */
	install_element(VIEW_NODE, &vtysh_show_error_code_cmd);
	install_element(ENABLE_NODE, &vtysh_show_debugging_cmd);
	install_element(ENABLE_NODE, &vtysh_show_debugging_hashtable_cmd);
	install_element(ENABLE_NODE, &vtysh_debug_all_cmd);
	install_element(CONFIG_NODE, &vtysh_debug_all_cmd);
	install_element(ENABLE_NODE, &vtysh_debug_memstats_cmd);
	install_element(CONFIG_NODE, &vtysh_debug_memstats_cmd);
	install_element(ENABLE_NODE, &vtysh_debug_uid_backtrace_cmd);
	install_element(CONFIG_NODE, &vtysh_debug_uid_backtrace_cmd);

	/* northbound */
	install_element(ENABLE_NODE, &show_config_running_cmd);
	install_element(ENABLE_NODE, &show_yang_operational_data_cmd);
	install_element(ENABLE_NODE, &show_yang_module_cmd);
	install_element(ENABLE_NODE, &show_yang_module_detail_cmd);
	install_element(ENABLE_NODE, &debug_nb_cmd);
	install_element(CONFIG_NODE, &debug_nb_cmd);

	/* misc lib show commands */
	install_element(VIEW_NODE, &vtysh_show_history_cmd);
	install_element(VIEW_NODE, &vtysh_show_memory_cmd);
	install_element(VIEW_NODE, &vtysh_show_modules_cmd);
	install_element(VIEW_NODE, &vtysh_show_work_queues_cmd);
	install_element(VIEW_NODE, &vtysh_show_work_queues_daemon_cmd);
	install_element(VIEW_NODE, &vtysh_show_thread_cmd);
	install_element(VIEW_NODE, &vtysh_show_poll_cmd);

	/* Logging */
	install_element(VIEW_NODE, &vtysh_show_logging_cmd);

	install_element(CONFIG_NODE, &vtysh_service_password_encrypt_cmd);
	install_element(CONFIG_NODE, &no_vtysh_service_password_encrypt_cmd);

	install_element(CONFIG_NODE, &vtysh_password_cmd);
	install_element(CONFIG_NODE, &no_vtysh_password_cmd);
	install_element(CONFIG_NODE, &vtysh_enable_password_cmd);
	install_element(CONFIG_NODE, &no_vtysh_enable_password_cmd);
}