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vtysh.c
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// SPDX-License-Identifier: GPL-2.0-or-later
/* Virtual terminal interface shell.
* Copyright (C) 2000 Kunihiro Ishiguro
*/
#include <zebra.h>
#include <pwd.h>
#include <grp.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 "network.h"
#include "filter.h"
#include "vtysh/vtysh.h"
#include "lib/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;
static bool stderr_tty;
static bool stderr_stdout_same;
/* 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);
}
/* --- */
/*
* When updating this array, remember to change the array size here and in
* vtysh.h
*/
struct vtysh_client vtysh_client[] = {
{.name = "mgmtd", .flag = VTYSH_MGMTD},
{.name = "zebra", .flag = VTYSH_ZEBRA},
{.name = "ripd", .flag = VTYSH_RIPD},
{.name = "ripngd", .flag = VTYSH_RIPNGD},
{.name = "ospfd", .flag = VTYSH_OSPFD},
{.name = "ospf6d", .flag = VTYSH_OSPF6D},
{.name = "ldpd", .flag = VTYSH_LDPD},
{.name = "bgpd", .flag = VTYSH_BGPD},
{.name = "isisd", .flag = VTYSH_ISISD},
{.name = "pimd", .flag = VTYSH_PIMD},
{.name = "nhrpd", .flag = VTYSH_NHRPD},
{.name = "eigrpd", .flag = VTYSH_EIGRPD},
{.name = "babeld", .flag = VTYSH_BABELD},
{.name = "sharpd", .flag = VTYSH_SHARPD},
{.name = "fabricd", .flag = VTYSH_FABRICD},
{.name = "watchfrr", .flag = VTYSH_WATCHFRR},
{.name = "pbrd", .flag = VTYSH_PBRD},
{.name = "staticd", .flag = VTYSH_STATICD},
{.name = "bfdd", .flag = VTYSH_BFDD},
{.name = "vrrpd", .flag = VTYSH_VRRPD},
{.name = "pathd", .flag = VTYSH_PATHD},
{.name = "pim6d", .flag = VTYSH_PIM6D},
};
/* 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;
}
}
static ssize_t vtysh_client_receive(struct vtysh_client *vclient, char *buf,
size_t bufsz, int *pass_fd)
{
struct iovec iov[1] = {
{
.iov_base = buf,
.iov_len = bufsz,
},
};
union {
uint8_t buf[CMSG_SPACE(sizeof(int))];
struct cmsghdr align;
} u;
struct msghdr mh = {
.msg_iov = iov,
.msg_iovlen = array_size(iov),
.msg_control = u.buf,
.msg_controllen = sizeof(u.buf),
};
struct cmsghdr *cmh = CMSG_FIRSTHDR(&mh);
ssize_t ret;
cmh->cmsg_level = SOL_SOCKET;
cmh->cmsg_type = SCM_RIGHTS;
cmh->cmsg_len = CMSG_LEN(sizeof(int));
memset(CMSG_DATA(cmh), -1, sizeof(int));
do {
ret = recvmsg(vclient->fd, &mh, 0);
if (ret >= 0 || (errno != EINTR && errno != EAGAIN))
break;
} while (true);
if (cmh->cmsg_len == CMSG_LEN(sizeof(int))) {
int fd;
memcpy(&fd, CMSG_DATA(cmh), sizeof(int));
if (fd != -1) {
if (pass_fd)
*pass_fd = fd;
else
close(fd);
}
}
return ret;
}
/*
* 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 *pass_fd)
{
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;
nread = vtysh_client_receive(
vclient, bufvalid, buf + bufsz - bufvalid - 1, pass_fd);
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, NULL);
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;
char *vty_buf_copy = XCALLOC(MTYPE_VTYSH_CMD, VTY_BUFSIZ);
char *vty_buf_trimmed = NULL;
while (fgets(vty->buf, VTY_BUFSIZ, fp)) {
lineno++;
strlcpy(vty_buf_copy, vty->buf, VTY_BUFSIZ);
vty_buf_trimmed = trim(vty_buf_copy);
/*
* Ignore the "end" lines, we will generate these where
* appropriate, otherwise we never execute
* XFRR_end_configuration, and start/end markers do not work.
*/
if (strmatch(vty_buf_trimmed, "end"))
continue;
if (strmatch(vty_buf_trimmed, "exit") &&
vty->node == CONFIG_NODE) {
fprintf(stderr, "line %d: Warning[%d]...: %s\n", lineno,
vty->node, "early exit from config file");
break;
}
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);
}
}
}
XFREE(MTYPE_VTYSH_CMD, vty_buf_copy);
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");