2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 * cli.c: Unix stdin/socket CLI.
18 * Copyright (c) 2008 Eliot Dresselhaus
20 * Permission is hereby granted, free of charge, to any person obtaining
21 * a copy of this software and associated documentation files (the
22 * "Software"), to deal in the Software without restriction, including
23 * without limitation the rights to use, copy, modify, merge, publish,
24 * distribute, sublicense, and/or sell copies of the Software, and to
25 * permit persons to whom the Software is furnished to do so, subject to
26 * the following conditions:
28 * The above copyright notice and this permission notice shall be
29 * included in all copies or substantial portions of the Software.
31 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
32 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
33 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
34 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
35 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
36 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
37 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
41 * @brief Unix stdin/socket command line interface.
42 * Provides a command line interface so humans can interact with VPP.
43 * This is predominantly a debugging and testing mechanism.
45 /*? %%clicmd:group_label Command line session %% ?*/
46 /*? %%syscfg:group_label Command line session %% ?*/
48 #include <vlib/vlib.h>
49 #include <vlib/unix/unix.h>
50 #include <vppinfra/timer.h>
58 #include <arpa/telnet.h>
59 #include <sys/ioctl.h>
61 /** ANSI escape code. */
64 /** ANSI Control Sequence Introducer. */
67 /** ANSI clear screen. */
68 #define ANSI_CLEAR CSI "2J" CSI "1;1H"
69 /** ANSI reset color settings. */
70 #define ANSI_RESET CSI "0m"
71 /** ANSI Start bold text. */
72 #define ANSI_BOLD CSI "1m"
73 /** ANSI Stop bold text. */
74 #define ANSI_DIM CSI "2m"
75 /** ANSI Start dark red text. */
76 #define ANSI_DRED ANSI_DIM CSI "31m"
77 /** ANSI Start bright red text. */
78 #define ANSI_BRED ANSI_BOLD CSI "31m"
79 /** ANSI clear line cursor is on. */
80 #define ANSI_CLEARLINE CSI "2K"
81 /** ANSI scroll screen down one line. */
82 #define ANSI_SCROLLDN CSI "1T"
83 /** ANSI save cursor position. */
84 #define ANSI_SAVECURSOR CSI "s"
85 /** ANSI restore cursor position if previously saved. */
86 #define ANSI_RESTCURSOR CSI "u"
88 /** Maximum depth into a byte stream from which to compile a Telnet
89 * protocol message. This is a saftey measure. */
90 #define UNIX_CLI_MAX_DEPTH_TELNET 24
92 /** Unix standard in */
93 #define UNIX_CLI_STDIN_FD 0
96 /** A CLI banner line. */
99 u8 *line; /**< The line to print. */
100 u32 length; /**< The length of the line without terminating NUL. */
103 #define _(a) { .line = (u8 *)(a), .length = sizeof(a) - 1 }
104 /** Plain welcome banner. */
105 static unix_cli_banner_t unix_cli_banner[] = {
106 _(" _______ _ _ _____ ___ \n"),
107 _(" __/ __/ _ \\ (_)__ | | / / _ \\/ _ \\\n"),
108 _(" _/ _// // / / / _ \\ | |/ / ___/ ___/\n"),
109 _(" /_/ /____(_)_/\\___/ |___/_/ /_/ \n"),
113 /** ANSI color welcome banner. */
114 static unix_cli_banner_t unix_cli_banner_color[] = {
115 _(ANSI_BRED " _______ _ " ANSI_RESET " _ _____ ___ \n"),
116 _(ANSI_BRED " __/ __/ _ \\ (_)__ " ANSI_RESET " | | / / _ \\/ _ \\\n"),
117 _(ANSI_BRED " _/ _// // / / / _ \\" ANSI_RESET " | |/ / ___/ ___/\n"),
118 _(ANSI_BRED " /_/ /____(_)_/\\___/" ANSI_RESET " |___/_/ /_/ \n"),
124 /** Pager line index */
127 /** Index into pager_vector */
130 /** Offset of the string in the line */
133 /** Length of the string in the line */
135 } unix_cli_pager_index_t;
138 /** Unix CLI session. */
141 /** The file index held by unix.c */
144 /** Vector of output pending write to file descriptor. */
147 /** Vector of input saved by Unix input node to be processed by
151 /** This session has command history. */
153 /** Array of vectors of commands in the history. */
154 u8 **command_history;
155 /** The command currently pointed at by the history cursor. */
157 /** How far from the end of the history array the user has browsed. */
160 /** Maximum number of history entries this session will store. */
163 /** Current command line counter */
166 /** The string being searched for in the history. */
168 /** If non-zero then the CLI is searching in the history array.
169 * - @c -1 means search backwards.
170 * - @c 1 means search forwards.
174 /** Position of the insert cursor on the current input line */
177 /** Line mode or char mode */
180 /** Set if the CRLF mode wants CR + LF */
183 /** Can we do ANSI output? */
186 /** Has the session started? */
189 /** Disable the pager? */
195 /** Index of line fragments in the pager buffer */
196 unix_cli_pager_index_t *pager_index;
198 /** Line number of top of page */
201 /** Terminal width */
204 /** Terminal height */
207 /** Process node identifier */
208 u32 process_node_index;
211 /** Resets the pager buffer and other data.
212 * @param f The CLI session whose pager needs to be reset.
215 unix_cli_pager_reset (unix_cli_file_t * f)
221 vec_free (f->pager_index);
224 vec_foreach (p, f->pager_vector)
228 vec_free (f->pager_vector);
232 /** Release storage used by a CLI session.
233 * @param f The CLI session whose storage needs to be released.
236 unix_cli_file_free (unix_cli_file_t * f)
238 vec_free (f->output_vector);
239 vec_free (f->input_vector);
240 unix_cli_pager_reset (f);
246 UNIX_CLI_PARSE_ACTION_NOACTION = 0, /**< No action */
247 UNIX_CLI_PARSE_ACTION_CRLF, /**< Carriage return, newline or enter */
248 UNIX_CLI_PARSE_ACTION_TAB, /**< Tab key */
249 UNIX_CLI_PARSE_ACTION_ERASE, /**< Erase cursor left */
250 UNIX_CLI_PARSE_ACTION_ERASERIGHT, /**< Erase cursor right */
251 UNIX_CLI_PARSE_ACTION_UP, /**< Up arrow */
252 UNIX_CLI_PARSE_ACTION_DOWN, /**< Down arrow */
253 UNIX_CLI_PARSE_ACTION_LEFT, /**< Left arrow */
254 UNIX_CLI_PARSE_ACTION_RIGHT, /**< Right arrow */
255 UNIX_CLI_PARSE_ACTION_HOME, /**< Home key (jump to start of line) */
256 UNIX_CLI_PARSE_ACTION_END, /**< End key (jump to end of line) */
257 UNIX_CLI_PARSE_ACTION_WORDLEFT, /**< Jump cursor to start of left word */
258 UNIX_CLI_PARSE_ACTION_WORDRIGHT, /**< Jump cursor to start of right word */
259 UNIX_CLI_PARSE_ACTION_ERASELINELEFT, /**< Erase line to left of cursor */
260 UNIX_CLI_PARSE_ACTION_ERASELINERIGHT, /**< Erase line to right & including cursor */
261 UNIX_CLI_PARSE_ACTION_CLEAR, /**< Clear the terminal */
262 UNIX_CLI_PARSE_ACTION_REVSEARCH, /**< Search backwards in command history */
263 UNIX_CLI_PARSE_ACTION_FWDSEARCH, /**< Search forwards in command history */
264 UNIX_CLI_PARSE_ACTION_YANK, /**< Undo last erase action */
265 UNIX_CLI_PARSE_ACTION_TELNETIAC, /**< Telnet control code */
267 UNIX_CLI_PARSE_ACTION_PAGER_CRLF, /**< Enter pressed (CR, CRLF, LF, etc) */
268 UNIX_CLI_PARSE_ACTION_PAGER_QUIT, /**< Exit the pager session */
269 UNIX_CLI_PARSE_ACTION_PAGER_NEXT, /**< Scroll to next page */
270 UNIX_CLI_PARSE_ACTION_PAGER_DN, /**< Scroll to next line */
271 UNIX_CLI_PARSE_ACTION_PAGER_UP, /**< Scroll to previous line */
272 UNIX_CLI_PARSE_ACTION_PAGER_TOP, /**< Scroll to first line */
273 UNIX_CLI_PARSE_ACTION_PAGER_BOTTOM, /**< Scroll to last line */
274 UNIX_CLI_PARSE_ACTION_PAGER_PGDN, /**< Scroll to next page */
275 UNIX_CLI_PARSE_ACTION_PAGER_PGUP, /**< Scroll to previous page */
276 UNIX_CLI_PARSE_ACTION_PAGER_REDRAW, /**< Clear and redraw the page on the terminal */
277 UNIX_CLI_PARSE_ACTION_PAGER_SEARCH, /**< Search the pager buffer */
279 UNIX_CLI_PARSE_ACTION_PARTIALMATCH, /**< Action parser found a partial match */
280 UNIX_CLI_PARSE_ACTION_NOMATCH /**< Action parser did not find any match */
281 } unix_cli_parse_action_t;
283 /** @brief Mapping of input buffer strings to action values.
284 * @note This won't work as a hash since we need to be able to do
285 * partial matches on the string.
289 u8 *input; /**< Input string to match. */
290 u32 len; /**< Length of input without final NUL. */
291 unix_cli_parse_action_t action; /**< Action to take when matched. */
292 } unix_cli_parse_actions_t;
294 /** @brief Given a capital ASCII letter character return a @c NUL terminated
295 * string with the control code for that letter.
297 * @param c An ASCII character.
298 * @return A @c NUL terminated string of type @c u8[].
301 * @c CTL('A') returns <code>{ 0x01, 0x00 }</code> as a @c u8[].
303 #define CTL(c) (u8[]){ (c) - '@', 0 }
305 #define _(a,b) { .input = (u8 *)(a), .len = sizeof(a) - 1, .action = (b) }
307 * Patterns to match on a CLI input stream.
310 static unix_cli_parse_actions_t unix_cli_parse_strings[] = {
312 _("\r\n", UNIX_CLI_PARSE_ACTION_CRLF), /* Must be before '\r' */
313 _("\n", UNIX_CLI_PARSE_ACTION_CRLF),
314 _("\r\0", UNIX_CLI_PARSE_ACTION_CRLF), /* Telnet does this */
315 _("\r", UNIX_CLI_PARSE_ACTION_CRLF),
317 /* Unix shell control codes */
318 _(CTL ('B'), UNIX_CLI_PARSE_ACTION_LEFT),
319 _(CTL ('F'), UNIX_CLI_PARSE_ACTION_RIGHT),
320 _(CTL ('P'), UNIX_CLI_PARSE_ACTION_UP),
321 _(CTL ('N'), UNIX_CLI_PARSE_ACTION_DOWN),
322 _(CTL ('A'), UNIX_CLI_PARSE_ACTION_HOME),
323 _(CTL ('E'), UNIX_CLI_PARSE_ACTION_END),
324 _(CTL ('D'), UNIX_CLI_PARSE_ACTION_ERASERIGHT),
325 _(CTL ('U'), UNIX_CLI_PARSE_ACTION_ERASELINELEFT),
326 _(CTL ('K'), UNIX_CLI_PARSE_ACTION_ERASELINERIGHT),
327 _(CTL ('Y'), UNIX_CLI_PARSE_ACTION_YANK),
328 _(CTL ('L'), UNIX_CLI_PARSE_ACTION_CLEAR),
329 _(ESC "b", UNIX_CLI_PARSE_ACTION_WORDLEFT), /* Alt-B */
330 _(ESC "f", UNIX_CLI_PARSE_ACTION_WORDRIGHT), /* Alt-F */
331 _("\b", UNIX_CLI_PARSE_ACTION_ERASE), /* ^H */
332 _("\x7f", UNIX_CLI_PARSE_ACTION_ERASE), /* Backspace */
333 _("\t", UNIX_CLI_PARSE_ACTION_TAB), /* ^I */
335 /* VT100 Normal mode - Broadest support */
336 _(CSI "A", UNIX_CLI_PARSE_ACTION_UP),
337 _(CSI "B", UNIX_CLI_PARSE_ACTION_DOWN),
338 _(CSI "C", UNIX_CLI_PARSE_ACTION_RIGHT),
339 _(CSI "D", UNIX_CLI_PARSE_ACTION_LEFT),
340 _(CSI "H", UNIX_CLI_PARSE_ACTION_HOME),
341 _(CSI "F", UNIX_CLI_PARSE_ACTION_END),
342 _(CSI "3~", UNIX_CLI_PARSE_ACTION_ERASERIGHT), /* Delete */
343 _(CSI "1;5D", UNIX_CLI_PARSE_ACTION_WORDLEFT), /* C-Left */
344 _(CSI "1;5C", UNIX_CLI_PARSE_ACTION_WORDRIGHT), /* C-Right */
346 /* VT100 Application mode - Some Gnome Terminal functions use these */
347 _(ESC "OA", UNIX_CLI_PARSE_ACTION_UP),
348 _(ESC "OB", UNIX_CLI_PARSE_ACTION_DOWN),
349 _(ESC "OC", UNIX_CLI_PARSE_ACTION_RIGHT),
350 _(ESC "OD", UNIX_CLI_PARSE_ACTION_LEFT),
351 _(ESC "OH", UNIX_CLI_PARSE_ACTION_HOME),
352 _(ESC "OF", UNIX_CLI_PARSE_ACTION_END),
354 /* ANSI X3.41-1974 - sent by Microsoft Telnet and PuTTY */
355 _(CSI "1~", UNIX_CLI_PARSE_ACTION_HOME),
356 _(CSI "4~", UNIX_CLI_PARSE_ACTION_END),
358 /* Emacs-ish history search */
359 _(CTL ('S'), UNIX_CLI_PARSE_ACTION_FWDSEARCH),
360 _(CTL ('R'), UNIX_CLI_PARSE_ACTION_REVSEARCH),
362 /* Other protocol things */
363 _("\xff", UNIX_CLI_PARSE_ACTION_TELNETIAC), /* IAC */
364 _("\0", UNIX_CLI_PARSE_ACTION_NOACTION), /* NUL */
365 _(NULL, UNIX_CLI_PARSE_ACTION_NOMATCH)
369 * Patterns to match when a CLI session is in the pager.
372 static unix_cli_parse_actions_t unix_cli_parse_pager[] = {
374 _("\r\n", UNIX_CLI_PARSE_ACTION_PAGER_CRLF), /* Must be before '\r' */
375 _("\n", UNIX_CLI_PARSE_ACTION_PAGER_CRLF),
376 _("\r\0", UNIX_CLI_PARSE_ACTION_PAGER_CRLF), /* Telnet does this */
377 _("\r", UNIX_CLI_PARSE_ACTION_PAGER_CRLF),
380 _(" ", UNIX_CLI_PARSE_ACTION_PAGER_NEXT),
381 _("q", UNIX_CLI_PARSE_ACTION_PAGER_QUIT),
382 _(CTL ('L'), UNIX_CLI_PARSE_ACTION_PAGER_REDRAW),
383 _(CTL ('R'), UNIX_CLI_PARSE_ACTION_PAGER_REDRAW),
384 _("/", UNIX_CLI_PARSE_ACTION_PAGER_SEARCH),
387 _(CSI "A", UNIX_CLI_PARSE_ACTION_PAGER_UP),
388 _(CSI "B", UNIX_CLI_PARSE_ACTION_PAGER_DN),
389 _(CSI "H", UNIX_CLI_PARSE_ACTION_PAGER_TOP),
390 _(CSI "F", UNIX_CLI_PARSE_ACTION_PAGER_BOTTOM),
392 /* VT100 Application mode */
393 _(ESC "OA", UNIX_CLI_PARSE_ACTION_PAGER_UP),
394 _(ESC "OB", UNIX_CLI_PARSE_ACTION_PAGER_DN),
395 _(ESC "OH", UNIX_CLI_PARSE_ACTION_PAGER_TOP),
396 _(ESC "OF", UNIX_CLI_PARSE_ACTION_PAGER_BOTTOM),
398 /* ANSI X3.41-1974 */
399 _(CSI "1~", UNIX_CLI_PARSE_ACTION_PAGER_TOP),
400 _(CSI "4~", UNIX_CLI_PARSE_ACTION_PAGER_BOTTOM),
401 _(CSI "5~", UNIX_CLI_PARSE_ACTION_PAGER_PGUP),
402 _(CSI "6~", UNIX_CLI_PARSE_ACTION_PAGER_PGDN),
404 /* Other protocol things */
405 _("\xff", UNIX_CLI_PARSE_ACTION_TELNETIAC), /* IAC */
406 _("\0", UNIX_CLI_PARSE_ACTION_NOACTION), /* NUL */
407 _(NULL, UNIX_CLI_PARSE_ACTION_NOMATCH)
412 /** CLI session events. */
415 UNIX_CLI_PROCESS_EVENT_READ_READY, /**< A file descriptor has data to be read. */
416 UNIX_CLI_PROCESS_EVENT_QUIT, /**< A CLI session wants to close. */
417 } unix_cli_process_event_type_t;
419 /** CLI global state. */
422 /** Prompt string for CLI. */
425 /** Vec pool of CLI sessions. */
426 unix_cli_file_t *cli_file_pool;
428 /** Vec pool of unused session indices. */
429 u32 *unused_cli_process_node_indices;
431 /** The session index of the stdin cli */
432 u32 stdin_cli_file_index;
434 /** File pool index of current input. */
435 u32 current_input_file_index;
438 /** CLI global state */
439 static unix_cli_main_t unix_cli_main;
442 * @brief Search for a byte sequence in the action list.
444 * Searches the @ref unix_cli_parse_actions_t list in @a a for a match with
445 * the bytes in @a input of maximum length @a ilen bytes.
446 * When a match is made @a *matched indicates how many bytes were matched.
447 * Returns a value from the enum @ref unix_cli_parse_action_t to indicate
448 * whether no match was found, a partial match was found or a complete
449 * match was found and what action, if any, should be taken.
451 * @param[in] a Actions list to search within.
452 * @param[in] input String fragment to search for.
453 * @param[in] ilen Length of the string in 'input'.
454 * @param[out] matched Pointer to an integer that will contain the number
455 * of bytes matched when a complete match is found.
457 * @return Action from @ref unix_cli_parse_action_t that the string fragment
459 * @ref UNIX_CLI_PARSE_ACTION_PARTIALMATCH is returned when the
460 * whole input string matches the start of at least one action.
461 * @ref UNIX_CLI_PARSE_ACTION_NOMATCH is returned when there is no
464 static unix_cli_parse_action_t
465 unix_cli_match_action (unix_cli_parse_actions_t * a,
466 u8 * input, u32 ilen, i32 * matched)
474 /* see if the start of the input buffer exactly matches the current
476 if (memcmp (input, a->input, a->len) == 0)
484 /* if the first ilen characters match, flag this as a partial -
485 * meaning keep collecting bytes in case of a future match */
486 if (memcmp (input, a->input, ilen) == 0)
490 /* check next action */
495 UNIX_CLI_PARSE_ACTION_PARTIALMATCH : UNIX_CLI_PARSE_ACTION_NOMATCH;
499 /** Add bytes to the output vector and then flagg the I/O system that bytes
500 * are available to be sent.
503 unix_cli_add_pending_output (unix_file_t * uf,
504 unix_cli_file_t * cf,
505 u8 * buffer, uword buffer_bytes)
507 unix_main_t *um = &unix_main;
509 vec_add (cf->output_vector, buffer, buffer_bytes);
510 if (vec_len (cf->output_vector) > 0)
512 int skip_update = 0 != (uf->flags & UNIX_FILE_DATA_AVAILABLE_TO_WRITE);
513 uf->flags |= UNIX_FILE_DATA_AVAILABLE_TO_WRITE;
515 um->file_update (uf, UNIX_FILE_UPDATE_MODIFY);
519 /** Delete all bytes from the output vector and flag the I/O system
520 * that no more bytes are available to be sent.
523 unix_cli_del_pending_output (unix_file_t * uf,
524 unix_cli_file_t * cf, uword n_bytes)
526 unix_main_t *um = &unix_main;
528 vec_delete (cf->output_vector, n_bytes, 0);
529 if (vec_len (cf->output_vector) <= 0)
531 int skip_update = 0 == (uf->flags & UNIX_FILE_DATA_AVAILABLE_TO_WRITE);
532 uf->flags &= ~UNIX_FILE_DATA_AVAILABLE_TO_WRITE;
534 um->file_update (uf, UNIX_FILE_UPDATE_MODIFY);
538 /** @brief A bit like strchr with a buffer length limit.
539 * Search a buffer for the first instance of a character up to the limit of
540 * the buffer length. If found then return the position of that character.
542 * The key departure from strchr is that if the character is not found then
543 * return the buffer length.
545 * @param chr The byte value to search for.
546 * @param str The buffer in which to search for the value.
547 * @param len The depth into the buffer to search.
549 * @return The index of the first occurence of \c chr. If \c chr is not
550 * found then \c len instead.
553 unix_vlib_findchr (u8 chr, u8 * str, word len)
556 for (i = 0; i < len; i++, str++)
564 /** @brief Send a buffer to the CLI stream if possible, enqueue it otherwise.
565 * Attempts to write given buffer to the file descriptor of the given
566 * Unix CLI session. If that session already has data in the output buffer
567 * or if the write attempt tells us to try again later then the given buffer
568 * is appended to the pending output buffer instead.
570 * This is typically called only from \c unix_vlib_cli_output_cooked since
571 * that is where CRLF handling occurs or from places where we explicitly do
572 * not want cooked handling.
574 * @param cf Unix CLI session of the desired stream to write to.
575 * @param uf The Unix file structure of the desired stream to write to.
576 * @param buffer Pointer to the buffer that needs to be written.
577 * @param buffer_bytes The number of bytes from \c buffer to write.
580 unix_vlib_cli_output_raw (unix_cli_file_t * cf,
581 unix_file_t * uf, u8 * buffer, uword buffer_bytes)
585 if (vec_len (cf->output_vector) == 0)
586 n = write (uf->file_descriptor, buffer, buffer_bytes);
588 if (n < 0 && errno != EAGAIN)
590 clib_unix_warning ("write");
592 else if ((word) n < (word) buffer_bytes)
594 /* We got EAGAIN or we already have stuff in the buffer;
595 * queue up whatever didn't get sent for later. */
598 unix_cli_add_pending_output (uf, cf, buffer + n, buffer_bytes - n);
602 /** @brief Process a buffer for CRLF handling before outputting it to the CLI.
604 * @param cf Unix CLI session of the desired stream to write to.
605 * @param uf The Unix file structure of the desired stream to write to.
606 * @param buffer Pointer to the buffer that needs to be written.
607 * @param buffer_bytes The number of bytes from \c buffer to write.
610 unix_vlib_cli_output_cooked (unix_cli_file_t * cf,
612 u8 * buffer, uword buffer_bytes)
614 word end = 0, start = 0;
616 while (end < buffer_bytes)
620 /* iterate the line on \n's so we can insert a \r before it */
621 end = unix_vlib_findchr ('\n',
623 buffer_bytes - start) + start;
627 /* otherwise just send the whole buffer */
631 unix_vlib_cli_output_raw (cf, uf, buffer + start, end - start);
635 if (end < buffer_bytes)
637 unix_vlib_cli_output_raw (cf, uf, (u8 *) "\r\n", 2);
638 end++; /* skip the \n that we already sent */
645 /** @brief Output the CLI prompt */
647 unix_cli_cli_prompt (unix_cli_file_t * cf, unix_file_t * uf)
649 unix_cli_main_t *cm = &unix_cli_main;
651 unix_vlib_cli_output_raw (cf, uf, cm->cli_prompt, vec_len (cm->cli_prompt));
654 /** @brief Output a pager prompt and show number of buffered lines */
656 unix_cli_pager_prompt (unix_cli_file_t * cf, unix_file_t * uf)
661 h = cf->pager_start + (cf->height - 1);
662 if (h > vec_len (cf->pager_index))
663 h = vec_len (cf->pager_index);
665 prompt = format (0, "\r%s-- more -- (%d-%d/%d)%s",
666 cf->ansi_capable ? ANSI_BOLD : "",
669 vec_len (cf->pager_index),
670 cf->ansi_capable ? ANSI_RESET : "");
672 unix_vlib_cli_output_cooked (cf, uf, prompt, vec_len (prompt));
677 /** @brief Output a pager "skipping" message */
679 unix_cli_pager_message (unix_cli_file_t * cf, unix_file_t * uf,
680 char *message, char *postfix)
684 prompt = format (0, "\r%s-- %s --%s%s",
685 cf->ansi_capable ? ANSI_BOLD : "",
686 message, cf->ansi_capable ? ANSI_RESET : "", postfix);
688 unix_vlib_cli_output_cooked (cf, uf, prompt, vec_len (prompt));
693 /** @brief Erase the printed pager prompt */
695 unix_cli_pager_prompt_erase (unix_cli_file_t * cf, unix_file_t * uf)
697 if (cf->ansi_capable)
699 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\r", 1);
700 unix_vlib_cli_output_cooked (cf, uf,
701 (u8 *) ANSI_CLEARLINE,
702 sizeof (ANSI_CLEARLINE) - 1);
708 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\r", 1);
709 for (i = 0; i < cf->width - 1; i++)
710 unix_vlib_cli_output_cooked (cf, uf, (u8 *) " ", 1);
711 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\r", 1);
715 /** @brief Uses an ANSI escape sequence to move the cursor */
717 unix_cli_ansi_cursor (unix_cli_file_t * cf, unix_file_t * uf, u16 x, u16 y)
721 str = format (0, "%s%d;%dH", CSI, y, x);
723 unix_vlib_cli_output_cooked (cf, uf, str, vec_len (str));
728 /** Redraw the currently displayed page of text.
729 * @param cf CLI session to redraw the pager buffer of.
730 * @param uf Unix file of the CLI session.
733 unix_cli_pager_redraw (unix_cli_file_t * cf, unix_file_t * uf)
735 unix_cli_pager_index_t *pi = NULL;
739 /* No active pager? Do nothing. */
740 if (!vec_len (cf->pager_index))
743 if (cf->ansi_capable)
745 /* If we have ANSI, send the clear screen sequence */
746 unix_vlib_cli_output_cooked (cf, uf,
748 sizeof (ANSI_CLEAR) - 1);
752 /* Otherwise make sure we're on a blank line */
753 unix_cli_pager_prompt_erase (cf, uf);
756 /* (Re-)send the current page of content */
757 for (i = 0; i < cf->height - 1 &&
758 i + cf->pager_start < vec_len (cf->pager_index); i++)
760 pi = &cf->pager_index[cf->pager_start + i];
761 line = cf->pager_vector[pi->line] + pi->offset;
763 unix_vlib_cli_output_cooked (cf, uf, line, pi->length);
765 /* if the last line didn't end in newline, add a newline */
766 if (pi && line[pi->length - 1] != '\n')
767 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1);
769 unix_cli_pager_prompt (cf, uf);
772 /** @brief Process and add a line to the pager index.
773 * In normal operation this function will take the given character string
774 * found in @c line and with length @c len_or_index and iterates the over the
775 * contents, adding each line of text discovered within it to the
776 * pager index. Lines are identified by newlines ("<code>\\n</code>") and by
777 * strings longer than the width of the terminal.
779 * If instead @c line is @c NULL then @c len_or_index is taken to mean the
780 * index of an existing line in the pager buffer; this simply means that the
781 * input line does not need to be cloned since we alreayd have it. This is
782 * typical if we are reindexing the pager buffer.
784 * @param cf The CLI session whose pager we are adding to.
785 * @param line The string of text to be indexed into the pager buffer.
786 * If @c line is @c NULL then the mode of operation
787 * changes slightly; see the description above.
788 * @param len_or_index If @c line is a pointer to a string then this parameter
789 * indicates the length of that string; Otherwise this
790 * value provides the index in the pager buffer of an
791 * existing string to be indexed.
794 unix_cli_pager_add_line (unix_cli_file_t * cf, u8 * line, word len_or_index)
798 word line_index, len;
799 u32 width = cf->width;
800 unix_cli_pager_index_t *pi;
804 /* Use a line already in the pager buffer */
805 line_index = len_or_index;
806 p = cf->pager_vector[line_index];
812 /* Add a copy of the raw string to the pager buffer */
813 p = vec_new (u8, len);
814 clib_memcpy (p, line, len);
816 /* store in pager buffer */
817 line_index = vec_len (cf->pager_vector);
818 vec_add1 (cf->pager_vector, p);
824 /* Find the next line, or run to terminal width, or run to EOL */
826 j = unix_vlib_findchr ((u8) '\n', p, l < width ? l : width);
828 if (j < l && p[j] == '\n') /* incl \n */
831 /* Add the line to the index */
832 k = vec_len (cf->pager_index);
833 vec_validate (cf->pager_index, k);
834 pi = &cf->pager_index[k];
836 pi->line = line_index;
845 /** @brief Reindex entire pager buffer.
846 * Resets the current pager index and then re-adds the lines in the pager
847 * buffer to the index.
849 * Additionally this function attempts to retain the current page start
850 * line offset by searching for the same top-of-screen line in the new index.
852 * @param cf The CLI session whose pager buffer should be reindexed.
855 unix_cli_pager_reindex (unix_cli_file_t * cf)
857 word i, old_line, old_offset;
858 unix_cli_pager_index_t *pi;
860 /* If there is nothing in the pager buffer then make sure the index
861 * is empty and move on.
863 if (cf->pager_vector == 0)
865 vec_reset_length (cf->pager_index);
869 /* Retain a pointer to the current page start line so we can
872 pi = &cf->pager_index[cf->pager_start];
874 old_offset = pi->offset;
876 /* Re-add the buffered lines to the index */
877 vec_reset_length (cf->pager_index);
878 vec_foreach_index (i, cf->pager_vector)
880 unix_cli_pager_add_line (cf, NULL, i);
883 /* Attempt to re-locate the previously stored page start line */
884 vec_foreach_index (i, cf->pager_index)
886 pi = &cf->pager_index[i];
888 if (pi->line == old_line &&
889 (pi->offset <= old_offset || pi->offset + pi->length > old_offset))
897 /* In case the start line was not found (rare), ensure the pager start
898 * index is within bounds
900 if (cf->pager_start >= vec_len (cf->pager_index))
902 if (!cf->height || vec_len (cf->pager_index) < (cf->height - 1))
905 cf->pager_start = vec_len (cf->pager_index) - (cf->height - 1);
909 /** VLIB CLI output function.
911 * If the terminal has a pager configured then this function takes care
912 * of collating output into the pager buffer; ensuring only the first page
913 * is displayed and any lines in excess of the first page are buffered.
915 * If the maximum number of index lines in the buffer is exceeded then the
916 * pager is cancelled and the contents of the current buffer are sent to the
919 * If there is no pager configured then the output is sent directly to the
922 * @param cli_file_index Index of the CLI session where this output is
924 * @param buffer String of printabe bytes to be output.
925 * @param buffer_bytes The number of bytes in @c buffer to be output.
928 unix_vlib_cli_output (uword cli_file_index, u8 * buffer, uword buffer_bytes)
930 unix_main_t *um = &unix_main;
931 unix_cli_main_t *cm = &unix_cli_main;
935 cf = pool_elt_at_index (cm->cli_file_pool, cli_file_index);
936 uf = pool_elt_at_index (um->file_pool, cf->unix_file_index);
938 if (cf->no_pager || um->cli_pager_buffer_limit == 0 || cf->height == 0)
940 unix_vlib_cli_output_cooked (cf, uf, buffer, buffer_bytes);
944 word row = vec_len (cf->pager_index);
946 unix_cli_pager_index_t *pi;
948 /* Index and add the output lines to the pager buffer. */
949 unix_cli_pager_add_line (cf, buffer, buffer_bytes);
951 /* Now iterate what was added to display the lines.
952 * If we reach the bottom of the page, display a prompt.
954 while (row < vec_len (cf->pager_index))
956 if (row < cf->height - 1)
958 /* output this line */
959 pi = &cf->pager_index[row];
960 line = cf->pager_vector[pi->line] + pi->offset;
961 unix_vlib_cli_output_cooked (cf, uf, line, pi->length);
963 /* if the last line didn't end in newline, and we're at the
964 * bottom of the page, add a newline */
965 if (line[pi->length - 1] != '\n' && row == cf->height - 2)
966 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1);
970 /* Display the pager prompt every 10 lines */
972 unix_cli_pager_prompt (cf, uf);
977 /* Check if we went over the pager buffer limit */
978 if (vec_len (cf->pager_index) > um->cli_pager_buffer_limit)
980 /* Stop using the pager for the remainder of this CLI command */
983 /* If we likely printed the prompt, erase it */
984 if (vec_len (cf->pager_index) > cf->height - 1)
985 unix_cli_pager_prompt_erase (cf, uf);
987 /* Dump out the contents of the buffer */
988 for (row = cf->pager_start + (cf->height - 1);
989 row < vec_len (cf->pager_index); row++)
991 pi = &cf->pager_index[row];
992 line = cf->pager_vector[pi->line] + pi->offset;
993 unix_vlib_cli_output_cooked (cf, uf, line, pi->length);
996 unix_cli_pager_reset (cf);
1001 /** Identify whether a terminal type is ANSI capable.
1003 * Compares the string given in @c term with a list of terminal types known
1004 * to support ANSI escape sequences.
1006 * This list contains, for example, @c xterm, @c screen and @c ansi.
1008 * @param term A string with a terminal type in it.
1009 * @param len The length of the string in @c term.
1011 * @return @c 1 if the terminal type is recognized as supporting ANSI
1012 * terminal sequences; @c 0 otherwise.
1015 unix_cli_terminal_type (u8 * term, uword len)
1017 /* This may later be better done as a hash of some sort. */
1019 if (strncasecmp(a, (char *)term, (size_t)len) == 0) return 1; \
1024 _("xterm-256color"); /* iTerm on Mac */
1026 _("ansi"); /* Microsoft Telnet */
1032 /** @brief Emit initial welcome banner and prompt on a connection. */
1034 unix_cli_file_welcome (unix_cli_main_t * cm, unix_cli_file_t * cf)
1036 unix_main_t *um = &unix_main;
1037 unix_file_t *uf = pool_elt_at_index (um->file_pool, cf->unix_file_index);
1038 unix_cli_banner_t *banner;
1042 * Put the first bytes directly into the buffer so that further output is
1043 * queued until everything is ready. (oterwise initial prompt can appear
1044 * mid way through VPP initialization)
1046 unix_cli_add_pending_output (uf, cf, (u8 *) "\r", 1);
1048 if (!um->cli_no_banner)
1050 if (cf->ansi_capable)
1052 banner = unix_cli_banner_color;
1053 len = ARRAY_LEN (unix_cli_banner_color);
1057 banner = unix_cli_banner;
1058 len = ARRAY_LEN (unix_cli_banner);
1061 for (i = 0; i < len; i++)
1063 unix_vlib_cli_output_cooked (cf, uf,
1064 banner[i].line, banner[i].length);
1069 unix_cli_cli_prompt (cf, uf);
1074 /** @brief A failsafe triggered on a timer to ensure we send the prompt
1075 * to telnet sessions that fail to negotiate the terminal type. */
1077 unix_cli_file_welcome_timer (any arg, f64 delay)
1079 unix_cli_main_t *cm = &unix_cli_main;
1080 unix_cli_file_t *cf;
1083 /* Check the connection didn't close already */
1084 if (pool_is_free_index (cm->cli_file_pool, (uword) arg))
1087 cf = pool_elt_at_index (cm->cli_file_pool, (uword) arg);
1090 unix_cli_file_welcome (cm, cf);
1093 /** @brief A mostly no-op Telnet state machine.
1094 * Process Telnet command bytes in a way that ensures we're mostly
1095 * transparent to the Telnet protocol. That is, it's mostly a no-op.
1097 * @return -1 if we need more bytes, otherwise a positive integer number of
1098 * bytes to consume from the input_vector, not including the initial
1102 unix_cli_process_telnet (unix_main_t * um,
1103 unix_cli_file_t * cf,
1104 unix_file_t * uf, u8 * input_vector, uword len)
1106 /* Input_vector starts at IAC byte.
1107 * See if we have a complete message; if not, return -1 so we wait for more.
1108 * if we have a complete message, consume those bytes from the vector.
1113 return -1; /* want more bytes */
1115 switch (input_vector[1])
1118 /* two IAC's in a row means to pass through 0xff.
1119 * since that makes no sense here, just consume it.
1128 /* Expect 3 bytes */
1129 if (vec_len (input_vector) < 3)
1130 return -1; /* want more bytes */
1137 /* Sub option - search ahead for IAC SE to end it */
1139 for (i = 3; i < len && i < UNIX_CLI_MAX_DEPTH_TELNET; i++)
1141 if (input_vector[i - 1] == IAC && input_vector[i] == SE)
1143 /* We have a complete message; see if we care about it */
1144 switch (input_vector[2])
1147 if (input_vector[3] != 0)
1149 /* See if the terminal type is ANSI capable */
1151 unix_cli_terminal_type (input_vector + 4, i - 5);
1152 /* If session not started, we can release the pause */
1154 /* Send the welcome banner and initial prompt */
1155 unix_cli_file_welcome (&unix_cli_main, cf);
1160 if (i != 8) /* check message is correct size */
1163 clib_net_to_host_u16 (*((u16 *) (input_vector + 3)));
1165 clib_net_to_host_u16 (*((u16 *) (input_vector + 5)));
1166 /* reindex pager buffer */
1167 unix_cli_pager_reindex (cf);
1169 unix_cli_pager_redraw (cf, uf);
1175 /* Consume it all */
1181 if (i == UNIX_CLI_MAX_DEPTH_TELNET)
1182 consume = 1; /* hit max search depth, advance one byte */
1185 return -1; /* want more bytes */
1203 /* Simple one-byte messages */
1208 /* Are You There - trigger a visible response */
1210 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "fd.io VPP\n", 10);
1214 /* Unknown command! Eat the IAC byte */
1221 /** @brief Process actionable input.
1222 * Based on the \c action process the input; this typically involves
1223 * searching the command history or editing the current command line.
1226 unix_cli_line_process_one (unix_cli_main_t * cm,
1228 unix_cli_file_t * cf,
1230 u8 input, unix_cli_parse_action_t action)
1234 u8 **possible_commands;
1239 case UNIX_CLI_PARSE_ACTION_NOACTION:
1242 case UNIX_CLI_PARSE_ACTION_REVSEARCH:
1243 case UNIX_CLI_PARSE_ACTION_FWDSEARCH:
1244 if (!cf->has_history || !cf->history_limit)
1246 if (cf->search_mode == 0)
1248 /* Erase the current command (if any) */
1249 for (j = 0; j < (vec_len (cf->current_command)); j++)
1250 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b \b", 3);
1252 vec_reset_length (cf->search_key);
1253 vec_reset_length (cf->current_command);
1254 if (action == UNIX_CLI_PARSE_ACTION_REVSEARCH)
1255 cf->search_mode = -1;
1257 cf->search_mode = 1;
1262 if (action == UNIX_CLI_PARSE_ACTION_REVSEARCH)
1263 cf->search_mode = -1;
1265 cf->search_mode = 1;
1267 cf->excursion += cf->search_mode;
1272 case UNIX_CLI_PARSE_ACTION_ERASELINELEFT:
1273 /* Erase the command from the cursor to the start */
1275 /* Shimmy forwards to the new end of line position */
1276 delta = vec_len (cf->current_command) - cf->cursor;
1277 for (j = cf->cursor; j > delta; j--)
1278 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b", 1);
1279 /* Zap from here to the end of what is currently displayed */
1280 for (; j < (vec_len (cf->current_command)); j++)
1281 unix_vlib_cli_output_cooked (cf, uf, (u8 *) " ", 1);
1282 /* Get back to the start of the line */
1283 for (j = 0; j < (vec_len (cf->current_command)); j++)
1284 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b", 1);
1286 j = vec_len (cf->current_command) - cf->cursor;
1287 memmove (cf->current_command, cf->current_command + cf->cursor, j);
1288 _vec_len (cf->current_command) = j;
1290 /* Print the new contents */
1291 unix_vlib_cli_output_cooked (cf, uf, cf->current_command, j);
1292 /* Shimmy back to the start */
1293 for (j = 0; j < (vec_len (cf->current_command)); j++)
1294 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b", 1);
1297 cf->search_mode = 0;
1300 case UNIX_CLI_PARSE_ACTION_ERASELINERIGHT:
1301 /* Erase the command from the cursor to the end */
1303 /* Zap from cursor to end of what is currently displayed */
1304 for (j = cf->cursor; j < (vec_len (cf->current_command)); j++)
1305 unix_vlib_cli_output_cooked (cf, uf, (u8 *) " ", 1);
1306 /* Get back to where we were */
1307 for (j = cf->cursor; j < (vec_len (cf->current_command)); j++)
1308 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b", 1);
1310 /* Truncate the line at the cursor */
1311 _vec_len (cf->current_command) = cf->cursor;
1313 cf->search_mode = 0;
1316 case UNIX_CLI_PARSE_ACTION_LEFT:
1319 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b", 1);
1323 cf->search_mode = 0;
1326 case UNIX_CLI_PARSE_ACTION_RIGHT:
1327 if (cf->cursor < vec_len (cf->current_command))
1329 /* have to emit the character under the cursor */
1330 unix_vlib_cli_output_cooked (cf, uf,
1331 cf->current_command + cf->cursor, 1);
1335 cf->search_mode = 0;
1338 case UNIX_CLI_PARSE_ACTION_UP:
1339 case UNIX_CLI_PARSE_ACTION_DOWN:
1340 if (!cf->has_history || !cf->history_limit)
1342 cf->search_mode = 0;
1343 /* Erase the command */
1344 for (j = cf->cursor; j < (vec_len (cf->current_command)); j++)
1345 unix_vlib_cli_output_cooked (cf, uf, (u8 *) " ", 1);
1346 for (j = 0; j < (vec_len (cf->current_command)); j++)
1347 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b \b", 3);
1348 vec_reset_length (cf->current_command);
1349 if (vec_len (cf->command_history))
1351 if (action == UNIX_CLI_PARSE_ACTION_UP)
1356 cf->excursion += delta;
1358 if (cf->excursion == vec_len (cf->command_history))
1360 /* down-arrowed to last entry - want a blank line */
1361 _vec_len (cf->current_command) = 0;
1363 else if (cf->excursion < 0)
1365 /* up-arrowed over the start to the end, want a blank line */
1366 cf->excursion = vec_len (cf->command_history);
1367 _vec_len (cf->current_command) = 0;
1371 if (cf->excursion > (i32) vec_len (cf->command_history) - 1)
1372 /* down-arrowed past end - wrap to start */
1375 /* Print the command at the current position */
1376 prev = cf->command_history[cf->excursion];
1377 vec_validate (cf->current_command, vec_len (prev) - 1);
1379 clib_memcpy (cf->current_command, prev, vec_len (prev));
1380 _vec_len (cf->current_command) = vec_len (prev);
1381 unix_vlib_cli_output_cooked (cf, uf, cf->current_command,
1382 vec_len (cf->current_command));
1384 cf->cursor = vec_len (cf->current_command);
1390 case UNIX_CLI_PARSE_ACTION_HOME:
1391 if (vec_len (cf->current_command) && cf->cursor > 0)
1395 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b", 1);
1400 cf->search_mode = 0;
1403 case UNIX_CLI_PARSE_ACTION_END:
1404 if (vec_len (cf->current_command) &&
1405 cf->cursor < vec_len (cf->current_command))
1407 unix_vlib_cli_output_cooked (cf, uf,
1408 cf->current_command + cf->cursor,
1409 vec_len (cf->current_command) -
1411 cf->cursor = vec_len (cf->current_command);
1414 cf->search_mode = 0;
1417 case UNIX_CLI_PARSE_ACTION_WORDLEFT:
1418 if (vec_len (cf->current_command) && cf->cursor > 0)
1422 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b", 1);
1425 while (j && isspace (cf->current_command[j]))
1427 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b", 1);
1430 while (j && !isspace (cf->current_command[j]))
1432 if (isspace (cf->current_command[j - 1]))
1434 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b", 1);
1441 cf->search_mode = 0;
1444 case UNIX_CLI_PARSE_ACTION_WORDRIGHT:
1445 if (vec_len (cf->current_command) &&
1446 cf->cursor < vec_len (cf->current_command))
1448 int e = vec_len (cf->current_command);
1450 while (j < e && !isspace (cf->current_command[j]))
1452 while (j < e && isspace (cf->current_command[j]))
1454 unix_vlib_cli_output_cooked (cf, uf,
1455 cf->current_command + cf->cursor,
1460 cf->search_mode = 0;
1464 case UNIX_CLI_PARSE_ACTION_ERASE:
1465 if (vec_len (cf->current_command))
1467 if (cf->cursor == vec_len (cf->current_command))
1469 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b \b", 3);
1470 _vec_len (cf->current_command)--;
1473 else if (cf->cursor > 0)
1475 /* shift everything at & to the right of the cursor left by 1 */
1476 j = vec_len (cf->current_command) - cf->cursor;
1477 memmove (cf->current_command + cf->cursor - 1,
1478 cf->current_command + cf->cursor, j);
1479 _vec_len (cf->current_command)--;
1481 /* redraw the rest of the line */
1482 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b", 1);
1483 unix_vlib_cli_output_cooked (cf, uf,
1484 cf->current_command + cf->cursor,
1486 unix_vlib_cli_output_cooked (cf, uf, (u8 *) " \b\b", 3);
1487 /* and shift the terminal cursor back where it should be */
1489 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b", 1);
1492 cf->search_mode = 0;
1494 vec_reset_length (cf->search_key);
1497 case UNIX_CLI_PARSE_ACTION_ERASERIGHT:
1498 if (vec_len (cf->current_command))
1500 if (cf->cursor < vec_len (cf->current_command))
1502 /* shift everything to the right of the cursor left by 1 */
1503 j = vec_len (cf->current_command) - cf->cursor - 1;
1504 memmove (cf->current_command + cf->cursor,
1505 cf->current_command + cf->cursor + 1, j);
1506 _vec_len (cf->current_command)--;
1507 /* redraw the rest of the line */
1508 unix_vlib_cli_output_cooked (cf, uf,
1509 cf->current_command + cf->cursor,
1511 unix_vlib_cli_output_cooked (cf, uf, (u8 *) " \b", 2);
1512 /* and shift the terminal cursor back where it should be */
1515 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b", 1);
1517 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b", 1);
1521 else if (input == 'D' - '@')
1523 /* ^D with no command entered = quit */
1524 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "quit\n", 5);
1525 vlib_process_signal_event (um->vlib_main,
1526 vlib_current_process (um->vlib_main),
1527 UNIX_CLI_PROCESS_EVENT_QUIT,
1528 cf - cm->cli_file_pool);
1530 cf->search_mode = 0;
1532 vec_reset_length (cf->search_key);
1535 case UNIX_CLI_PARSE_ACTION_CLEAR:
1536 /* If we're in ANSI mode, clear the screen.
1537 * Then redraw the prompt and any existing command input, then put
1538 * the cursor back where it was in that line.
1540 if (cf->ansi_capable)
1541 unix_vlib_cli_output_cooked (cf, uf,
1543 sizeof (ANSI_CLEAR) - 1);
1545 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1);
1547 unix_vlib_cli_output_raw (cf, uf,
1548 cm->cli_prompt, vec_len (cm->cli_prompt));
1549 unix_vlib_cli_output_raw (cf, uf,
1550 cf->current_command,
1551 vec_len (cf->current_command));
1552 for (j = cf->cursor; j < vec_len (cf->current_command); j++)
1553 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b", 1);
1557 case UNIX_CLI_PARSE_ACTION_TAB:
1558 if (cf->cursor < vec_len (cf->current_command))
1560 /* if we are in the middle of a line, complete only if
1561 * the cursor points to whitespace */
1562 if (isspace (cf->current_command[cf->cursor]))
1564 /* save and clear any input that is after the cursor */
1565 vec_resize (save, vec_len (cf->current_command) - cf->cursor);
1566 clib_memcpy (save, cf->current_command + cf->cursor,
1567 vec_len (cf->current_command) - cf->cursor);
1568 _vec_len (cf->current_command) = cf->cursor;
1572 unix_vlib_cli_output_raw (cf, uf, (u8 *) "\a", 1);
1577 vlib_cli_get_possible_completions (cf->current_command);
1578 if (vec_len (possible_commands) == 1)
1581 u8 *completed = possible_commands[0];
1583 /* find the last word of current_command */
1584 while (j >= 1 && !isspace (cf->current_command[j - 1]))
1587 unix_vlib_cli_output_raw (cf, uf, (u8 *) "\b", 1);
1589 _vec_len (cf->current_command) = j;
1591 /* replace it with the newly expanded command */
1592 vec_append (cf->current_command, completed);
1594 /* echo to the terminal */
1595 unix_vlib_cli_output_raw (cf, uf, completed, vec_len (completed));
1597 /* add one trailing space if needed */
1598 if (vec_len (save) == 0)
1600 vec_add1 (cf->current_command, ' ');
1601 unix_vlib_cli_output_raw (cf, uf, (u8 *) " ", 1);
1604 cf->cursor = vec_len (cf->current_command);
1607 else if (vec_len (possible_commands) >= 2)
1609 u8 **possible_command;
1610 uword max_command_len = 0, min_command_len = ~0;
1613 vec_foreach (possible_command, possible_commands)
1615 if (vec_len (*possible_command) > max_command_len)
1617 max_command_len = vec_len (*possible_command);
1619 if (vec_len (*possible_command) < min_command_len)
1621 min_command_len = vec_len (*possible_command);
1625 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1);
1628 vec_foreach (possible_command, possible_commands)
1630 if (i + max_command_len >= cf->width)
1632 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1);
1635 unix_vlib_cli_output_raw (cf, uf, *possible_command,
1636 vec_len (*possible_command));
1637 for (j = vec_len (*possible_command); j < max_command_len + 2;
1640 unix_vlib_cli_output_raw (cf, uf, (u8 *) " ", 1);
1642 i += max_command_len + 2;
1645 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1);
1647 /* rewrite prompt */
1648 unix_cli_cli_prompt (cf, uf);
1649 unix_vlib_cli_output_raw (cf, uf, cf->current_command,
1650 vec_len (cf->current_command));
1652 /* count length of last word */
1655 while (j >= 1 && !isspace (cf->current_command[j - 1]))
1661 /* determine smallest common command */
1662 for (; i < min_command_len; i++)
1666 vec_foreach (possible_command, possible_commands)
1670 common = (*possible_command)[i];
1672 else if (common != (*possible_command)[i])
1680 vec_add1 (cf->current_command, common);
1682 unix_vlib_cli_output_raw (cf, uf, (u8 *) & common, 1);
1692 unix_vlib_cli_output_raw (cf, uf, (u8 *) "\a", 1);
1695 if (vec_len (save) > 0)
1697 /* restore remaining input if tab was hit in the middle of a line */
1698 unix_vlib_cli_output_raw (cf, uf, save, vec_len (save));
1699 for (j = 0; j < vec_len (save); j++)
1701 unix_vlib_cli_output_raw (cf, uf, (u8 *) "\b", 1);
1703 vec_append (cf->current_command, save);
1706 vec_free (possible_commands);
1709 case UNIX_CLI_PARSE_ACTION_YANK:
1714 case UNIX_CLI_PARSE_ACTION_PAGER_QUIT:
1716 unix_cli_pager_prompt_erase (cf, uf);
1717 unix_cli_pager_reset (cf);
1718 unix_cli_cli_prompt (cf, uf);
1721 case UNIX_CLI_PARSE_ACTION_PAGER_NEXT:
1722 case UNIX_CLI_PARSE_ACTION_PAGER_PGDN:
1723 /* show next page of the buffer */
1724 if (cf->height + cf->pager_start < vec_len (cf->pager_index))
1727 unix_cli_pager_index_t *pi = NULL;
1729 int m = cf->pager_start + (cf->height - 1);
1730 unix_cli_pager_prompt_erase (cf, uf);
1732 j < vec_len (cf->pager_index) && cf->pager_start < m;
1733 j++, cf->pager_start++)
1735 pi = &cf->pager_index[j];
1736 line = cf->pager_vector[pi->line] + pi->offset;
1737 unix_vlib_cli_output_cooked (cf, uf, line, pi->length);
1739 /* if the last line didn't end in newline, add a newline */
1740 if (pi && line[pi->length - 1] != '\n')
1741 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1);
1742 unix_cli_pager_prompt (cf, uf);
1746 if (action == UNIX_CLI_PARSE_ACTION_PAGER_NEXT)
1747 /* no more in buffer, exit, but only if it was <space> */
1752 case UNIX_CLI_PARSE_ACTION_PAGER_DN:
1753 case UNIX_CLI_PARSE_ACTION_PAGER_CRLF:
1754 /* display the next line of the buffer */
1755 if (cf->pager_start < vec_len (cf->pager_index) - (cf->height - 1))
1758 unix_cli_pager_index_t *pi;
1760 unix_cli_pager_prompt_erase (cf, uf);
1761 pi = &cf->pager_index[cf->pager_start + (cf->height - 1)];
1762 line = cf->pager_vector[pi->line] + pi->offset;
1763 unix_vlib_cli_output_cooked (cf, uf, line, pi->length);
1765 /* if the last line didn't end in newline, add a newline */
1766 if (line[pi->length - 1] != '\n')
1767 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1);
1768 unix_cli_pager_prompt (cf, uf);
1772 if (action == UNIX_CLI_PARSE_ACTION_PAGER_CRLF)
1773 /* no more in buffer, exit, but only if it was <enter> */
1779 case UNIX_CLI_PARSE_ACTION_PAGER_UP:
1780 /* scroll the page back one line */
1781 if (cf->pager_start > 0)
1784 unix_cli_pager_index_t *pi = NULL;
1787 if (cf->ansi_capable)
1789 pi = &cf->pager_index[cf->pager_start];
1790 line = cf->pager_vector[pi->line] + pi->offset;
1791 unix_cli_pager_prompt_erase (cf, uf);
1792 unix_vlib_cli_output_cooked (cf, uf, (u8 *) ANSI_SCROLLDN,
1793 sizeof (ANSI_SCROLLDN) - 1);
1794 unix_vlib_cli_output_cooked (cf, uf, (u8 *) ANSI_SAVECURSOR,
1795 sizeof (ANSI_SAVECURSOR) - 1);
1796 unix_cli_ansi_cursor (cf, uf, 1, 1);
1797 unix_vlib_cli_output_cooked (cf, uf, (u8 *) ANSI_CLEARLINE,
1798 sizeof (ANSI_CLEARLINE) - 1);
1799 unix_vlib_cli_output_cooked (cf, uf, line, pi->length);
1800 unix_vlib_cli_output_cooked (cf, uf, (u8 *) ANSI_RESTCURSOR,
1801 sizeof (ANSI_RESTCURSOR) - 1);
1802 unix_cli_pager_prompt_erase (cf, uf);
1803 unix_cli_pager_prompt (cf, uf);
1807 int m = cf->pager_start + (cf->height - 1);
1808 unix_cli_pager_prompt_erase (cf, uf);
1809 for (j = cf->pager_start;
1810 j < vec_len (cf->pager_index) && j < m; j++)
1812 pi = &cf->pager_index[j];
1813 line = cf->pager_vector[pi->line] + pi->offset;
1814 unix_vlib_cli_output_cooked (cf, uf, line, pi->length);
1816 /* if the last line didn't end in newline, add a newline */
1817 if (pi && line[pi->length - 1] != '\n')
1818 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1);
1819 unix_cli_pager_prompt (cf, uf);
1824 case UNIX_CLI_PARSE_ACTION_PAGER_TOP:
1825 /* back to the first page of the buffer */
1826 if (cf->pager_start > 0)
1829 unix_cli_pager_index_t *pi = NULL;
1831 cf->pager_start = 0;
1832 int m = cf->pager_start + (cf->height - 1);
1833 unix_cli_pager_prompt_erase (cf, uf);
1834 for (j = cf->pager_start; j < vec_len (cf->pager_index) && j < m;
1837 pi = &cf->pager_index[j];
1838 line = cf->pager_vector[pi->line] + pi->offset;
1839 unix_vlib_cli_output_cooked (cf, uf, line, pi->length);
1841 /* if the last line didn't end in newline, add a newline */
1842 if (pi && line[pi->length - 1] != '\n')
1843 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1);
1844 unix_cli_pager_prompt (cf, uf);
1848 case UNIX_CLI_PARSE_ACTION_PAGER_BOTTOM:
1849 /* skip to the last page of the buffer */
1850 if (cf->pager_start < vec_len (cf->pager_index) - (cf->height - 1))
1853 unix_cli_pager_index_t *pi = NULL;
1855 cf->pager_start = vec_len (cf->pager_index) - (cf->height - 1);
1856 unix_cli_pager_prompt_erase (cf, uf);
1857 unix_cli_pager_message (cf, uf, "skipping", "\n");
1858 for (j = cf->pager_start; j < vec_len (cf->pager_index); j++)
1860 pi = &cf->pager_index[j];
1861 line = cf->pager_vector[pi->line] + pi->offset;
1862 unix_vlib_cli_output_cooked (cf, uf, line, pi->length);
1864 /* if the last line didn't end in newline, add a newline */
1865 if (pi && line[pi->length - 1] != '\n')
1866 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1);
1867 unix_cli_pager_prompt (cf, uf);
1871 case UNIX_CLI_PARSE_ACTION_PAGER_PGUP:
1872 /* wander back one page in the buffer */
1873 if (cf->pager_start > 0)
1876 unix_cli_pager_index_t *pi = NULL;
1879 if (cf->pager_start >= cf->height)
1880 cf->pager_start -= cf->height - 1;
1882 cf->pager_start = 0;
1883 m = cf->pager_start + cf->height - 1;
1884 unix_cli_pager_prompt_erase (cf, uf);
1885 for (j = cf->pager_start; j < vec_len (cf->pager_index) && j < m;
1888 pi = &cf->pager_index[j];
1889 line = cf->pager_vector[pi->line] + pi->offset;
1890 unix_vlib_cli_output_cooked (cf, uf, line, pi->length);
1892 /* if the last line didn't end in newline, add a newline */
1893 if (pi && line[pi->length - 1] != '\n')
1894 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1);
1895 unix_cli_pager_prompt (cf, uf);
1899 case UNIX_CLI_PARSE_ACTION_PAGER_REDRAW:
1900 /* Redraw the current pager screen */
1901 unix_cli_pager_redraw (cf, uf);
1904 case UNIX_CLI_PARSE_ACTION_PAGER_SEARCH:
1905 /* search forwards in the buffer */
1909 case UNIX_CLI_PARSE_ACTION_CRLF:
1911 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1);
1913 if (cf->has_history && cf->history_limit)
1915 if (cf->command_history
1916 && vec_len (cf->command_history) >= cf->history_limit)
1918 vec_free (cf->command_history[0]);
1919 vec_delete (cf->command_history, 1, 0);
1921 /* Don't add blank lines to the cmd history */
1922 if (vec_len (cf->current_command))
1924 /* Don't duplicate the previous command */
1925 j = vec_len (cf->command_history);
1927 (vec_len (cf->current_command) !=
1928 vec_len (cf->command_history[j - 1])
1929 || memcmp (cf->current_command, cf->command_history[j - 1],
1930 vec_len (cf->current_command)) != 0))
1932 /* copy the command to the history */
1934 vec_append (c, cf->current_command);
1935 vec_add1 (cf->command_history, c);
1936 cf->command_number++;
1939 cf->excursion = vec_len (cf->command_history);
1942 cf->search_mode = 0;
1943 vec_reset_length (cf->search_key);
1948 case UNIX_CLI_PARSE_ACTION_PARTIALMATCH:
1949 case UNIX_CLI_PARSE_ACTION_NOMATCH:
1950 if (vec_len (cf->pager_index))
1954 else if (cf->has_history && cf->search_mode && isprint (input))
1956 int k, limit, offset;
1959 vec_add1 (cf->search_key, input);
1962 for (j = 0; j < vec_len (cf->command_history); j++)
1964 if (cf->excursion > (i32) vec_len (cf->command_history) - 1)
1966 else if (cf->excursion < 0)
1967 cf->excursion = vec_len (cf->command_history) - 1;
1969 item = cf->command_history[cf->excursion];
1971 limit = (vec_len (cf->search_key) > vec_len (item)) ?
1972 vec_len (item) : vec_len (cf->search_key);
1974 for (offset = 0; offset <= vec_len (item) - limit; offset++)
1976 for (k = 0; k < limit; k++)
1978 if (item[k + offset] != cf->search_key[k])
1981 goto found_at_offset;
1989 for (j = 0; j < vec_len (cf->current_command); j++)
1990 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b \b", 3);
1992 vec_validate (cf->current_command, vec_len (item) - 1);
1993 clib_memcpy (cf->current_command, item, vec_len (item));
1994 _vec_len (cf->current_command) = vec_len (item);
1996 unix_vlib_cli_output_cooked (cf, uf, cf->current_command,
1997 vec_len (cf->current_command));
1998 cf->cursor = vec_len (cf->current_command);
2002 cf->excursion += cf->search_mode;
2005 unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\nNo match...", 12);
2006 vec_reset_length (cf->search_key);
2007 vec_reset_length (cf->current_command);
2008 cf->search_mode = 0;
2012 else if (isprint (input)) /* skip any errant control codes */
2014 if (cf->cursor == vec_len (cf->current_command))
2017 vec_add1 (cf->current_command, input);
2020 /* Echo the character back to the client */
2021 unix_vlib_cli_output_raw (cf, uf, &input, 1);
2025 /* Insert at cursor: resize +1 byte, move everything over */
2026 j = vec_len (cf->current_command) - cf->cursor;
2027 vec_add1 (cf->current_command, (u8) 'A');
2028 memmove (cf->current_command + cf->cursor + 1,
2029 cf->current_command + cf->cursor, j);
2030 cf->current_command[cf->cursor] = input;
2031 /* Redraw the line */
2033 unix_vlib_cli_output_raw (cf, uf,
2034 cf->current_command + cf->cursor, j);
2035 /* Put terminal cursor back */
2037 unix_vlib_cli_output_raw (cf, uf, (u8 *) "\b", 1);
2043 /* no-op - not printable or otherwise not actionable */
2050 case UNIX_CLI_PARSE_ACTION_TELNETIAC:
2056 /** @brief Process input bytes on a stream to provide line editing and
2057 * command history in the CLI. */
2059 unix_cli_line_edit (unix_cli_main_t * cm,
2060 unix_main_t * um, unix_cli_file_t * cf)
2062 unix_file_t *uf = pool_elt_at_index (um->file_pool, cf->unix_file_index);
2065 for (i = 0; i < vec_len (cf->input_vector); i++)
2067 unix_cli_parse_action_t action;
2069 unix_cli_parse_actions_t *a;
2071 /* If we're in the pager mode, search the pager actions */
2073 vec_len (cf->pager_index) ? unix_cli_parse_pager :
2074 unix_cli_parse_strings;
2076 /* See if the input buffer is some sort of control code */
2077 action = unix_cli_match_action (a, &cf->input_vector[i],
2078 vec_len (cf->input_vector) - i,
2083 case UNIX_CLI_PARSE_ACTION_PARTIALMATCH:
2086 /* There was a partial match which means we need more bytes
2087 * than the input buffer currently has.
2088 * Since the bytes before here have been processed, shift
2089 * the remaining contents to the start of the input buffer.
2091 vec_delete (cf->input_vector, i, 0);
2093 return 1; /* wait for more */
2095 case UNIX_CLI_PARSE_ACTION_TELNETIAC:
2096 /* process telnet options */
2097 matched = unix_cli_process_telnet (um, cf, uf,
2098 cf->input_vector + i,
2099 vec_len (cf->input_vector) - i);
2104 /* There was a partial match which means we need more bytes
2105 * than the input buffer currently has.
2106 * Since the bytes before here have been processed, shift
2107 * the remaining contents to the start of the input buffer.
2109 vec_delete (cf->input_vector, i, 0);
2111 return 1; /* wait for more */
2116 /* process the action */
2117 if (!unix_cli_line_process_one (cm, um, cf, uf,
2118 cf->input_vector[i], action))
2120 /* CRLF found. Consume the bytes from the input_vector */
2121 vec_delete (cf->input_vector, i + matched, 0);
2122 /* And tell our caller to execute cf->input_command */
2130 vec_reset_length (cf->input_vector);
2134 /** @brief Process input to a CLI session. */
2136 unix_cli_process_input (unix_cli_main_t * cm, uword cli_file_index)
2138 unix_main_t *um = &unix_main;
2140 unix_cli_file_t *cf = pool_elt_at_index (cm->cli_file_pool, cli_file_index);
2141 unformat_input_t input;
2142 int vlib_parse_eval (u8 *);
2145 /* Try vlibplex first. Someday... */
2146 if (0 && vlib_parse_eval (cf->input_vector) == 0)
2151 /* just treat whatever we got as a complete line of input */
2152 cf->current_command = cf->input_vector;
2156 /* Line edit, echo, etc. */
2157 if (unix_cli_line_edit (cm, um, cf))
2158 /* want more input */
2165 vec_reset_length (lv);
2166 lv = format (lv, "%U[%d]: %v",
2167 format_timeval, 0 /* current bat-time */ ,
2168 0 /* current bat-format */ ,
2169 cli_file_index, cf->input_vector);
2171 int rv __attribute__ ((unused)) =
2172 write (um->log_fd, lv, vec_len (lv));
2176 /* Copy our input command to a new string */
2177 unformat_init_vector (&input, cf->current_command);
2179 /* Remove leading white space from input. */
2180 (void) unformat (&input, "");
2182 cm->current_input_file_index = cli_file_index;
2183 cf->pager_start = 0; /* start a new pager session */
2185 if (unformat_check_input (&input) != UNFORMAT_END_OF_INPUT)
2186 vlib_cli_input (um->vlib_main, &input, unix_vlib_cli_output,
2189 /* Zero buffer since otherwise unformat_free will call vec_free on it. */
2192 unformat_free (&input);
2194 /* Re-fetch pointer since pool may have moved. */
2195 cf = pool_elt_at_index (cm->cli_file_pool, cli_file_index);
2196 uf = pool_elt_at_index (um->file_pool, cf->unix_file_index);
2199 /* reset vector; we'll re-use it later */
2201 vec_reset_length (cf->input_vector);
2203 vec_reset_length (cf->current_command);
2205 if (cf->no_pager == 2)
2207 /* Pager was programmatically disabled */
2208 unix_cli_pager_message (cf, uf, "pager buffer overflowed", "\n");
2209 cf->no_pager = um->cli_no_pager;
2212 if (vec_len (cf->pager_index) == 0
2213 || vec_len (cf->pager_index) < cf->height)
2215 /* There was no need for the pager */
2216 unix_cli_pager_reset (cf);
2219 unix_cli_cli_prompt (cf, uf);
2223 /* Display the pager prompt */
2224 unix_cli_pager_prompt (cf, uf);
2227 /* Any residual data in the input vector? */
2228 if (vec_len (cf->input_vector))
2232 /** Destroy a CLI session.
2233 * @note If we destroy the @c stdin session this additionally signals
2234 * the shutdown of VPP.
2237 unix_cli_kill (unix_cli_main_t * cm, uword cli_file_index)
2239 unix_main_t *um = &unix_main;
2240 unix_cli_file_t *cf;
2244 cf = pool_elt_at_index (cm->cli_file_pool, cli_file_index);
2245 uf = pool_elt_at_index (um->file_pool, cf->unix_file_index);
2247 /* Quit/EOF on stdin means quit program. */
2248 if (uf->file_descriptor == UNIX_CLI_STDIN_FD)
2249 clib_longjmp (&um->vlib_main->main_loop_exit, VLIB_MAIN_LOOP_EXIT_CLI);
2251 vec_free (cf->current_command);
2252 vec_free (cf->search_key);
2254 for (i = 0; i < vec_len (cf->command_history); i++)
2255 vec_free (cf->command_history[i]);
2257 vec_free (cf->command_history);
2259 unix_file_del (um, uf);
2261 unix_cli_file_free (cf);
2262 pool_put (cm->cli_file_pool, cf);
2265 /** Handle system events. */
2267 unix_cli_process (vlib_main_t * vm,
2268 vlib_node_runtime_t * rt, vlib_frame_t * f)
2270 unix_cli_main_t *cm = &unix_cli_main;
2275 unix_cli_process_event_type_t event_type;
2276 vlib_process_wait_for_event (vm);
2277 event_type = vlib_process_get_events (vm, &data);
2281 case UNIX_CLI_PROCESS_EVENT_READ_READY:
2282 for (i = 0; i < vec_len (data); i++)
2283 unix_cli_process_input (cm, data[i]);
2286 case UNIX_CLI_PROCESS_EVENT_QUIT:
2287 /* Kill this process. */
2288 for (i = 0; i < vec_len (data); i++)
2289 unix_cli_kill (cm, data[i]);
2294 _vec_len (data) = 0;
2300 vlib_node_set_state (vm, rt->node_index, VLIB_NODE_STATE_DISABLED);
2302 /* Add node index so we can re-use this process later. */
2303 vec_add1 (cm->unused_cli_process_node_indices, rt->node_index);
2308 /** Called when a CLI session file descriptor can be written to without
2310 static clib_error_t *
2311 unix_cli_write_ready (unix_file_t * uf)
2313 unix_cli_main_t *cm = &unix_cli_main;
2314 unix_cli_file_t *cf;
2317 cf = pool_elt_at_index (cm->cli_file_pool, uf->private_data);
2319 /* Flush output vector. */
2320 n = write (uf->file_descriptor,
2321 cf->output_vector, vec_len (cf->output_vector));
2323 if (n < 0 && errno != EAGAIN)
2324 return clib_error_return_unix (0, "write");
2327 unix_cli_del_pending_output (uf, cf, n);
2329 return /* no error */ 0;
2332 /** Called when a CLI session file descriptor has data to be read. */
2333 static clib_error_t *
2334 unix_cli_read_ready (unix_file_t * uf)
2336 unix_main_t *um = &unix_main;
2337 unix_cli_main_t *cm = &unix_cli_main;
2338 unix_cli_file_t *cf;
2340 int n, n_read, n_try;
2342 cf = pool_elt_at_index (cm->cli_file_pool, uf->private_data);
2347 l = vec_len (cf->input_vector);
2348 vec_resize (cf->input_vector, l + n_try);
2350 n = read (uf->file_descriptor, cf->input_vector + l, n_try);
2353 if (n < 0 && errno != EAGAIN)
2354 return clib_error_return_unix (0, "read");
2356 n_read = n < 0 ? 0 : n;
2357 _vec_len (cf->input_vector) = l + n_read;
2361 vlib_process_signal_event (um->vlib_main,
2362 cf->process_node_index,
2364 ? UNIX_CLI_PROCESS_EVENT_QUIT
2365 : UNIX_CLI_PROCESS_EVENT_READ_READY),
2366 /* event data */ uf->private_data);
2368 return /* no error */ 0;
2371 /** Store a new CLI session.
2372 * @param name The name of the session.
2373 * @param fd The file descriptor for the session I/O.
2374 * @return The session ID.
2377 unix_cli_file_add (unix_cli_main_t * cm, char *name, int fd)
2379 unix_main_t *um = &unix_main;
2380 unix_cli_file_t *cf;
2381 unix_file_t template = { 0 };
2382 vlib_main_t *vm = um->vlib_main;
2385 name = (char *) format (0, "unix-cli-%s", name);
2387 if (vec_len (cm->unused_cli_process_node_indices) > 0)
2389 uword l = vec_len (cm->unused_cli_process_node_indices);
2391 /* Find node and give it new name. */
2392 n = vlib_get_node (vm, cm->unused_cli_process_node_indices[l - 1]);
2394 n->name = (u8 *) name;
2396 vlib_node_set_state (vm, n->index, VLIB_NODE_STATE_POLLING);
2398 _vec_len (cm->unused_cli_process_node_indices) = l - 1;
2402 static vlib_node_registration_t r = {
2403 .function = unix_cli_process,
2404 .type = VLIB_NODE_TYPE_PROCESS,
2405 .process_log2_n_stack_bytes = 16,
2409 vlib_register_node (vm, &r);
2412 n = vlib_get_node (vm, r.index);
2415 pool_get (cm->cli_file_pool, cf);
2416 memset (cf, 0, sizeof (*cf));
2418 template.read_function = unix_cli_read_ready;
2419 template.write_function = unix_cli_write_ready;
2420 template.file_descriptor = fd;
2421 template.private_data = cf - cm->cli_file_pool;
2423 cf->process_node_index = n->index;
2424 cf->unix_file_index = unix_file_add (um, &template);
2425 cf->output_vector = 0;
2426 cf->input_vector = 0;
2428 vlib_start_process (vm, n->runtime_index);
2430 vlib_process_t *p = vlib_get_process_from_node (vm, n);
2431 p->output_function = unix_vlib_cli_output;
2432 p->output_function_arg = cf - cm->cli_file_pool;
2434 return cf - cm->cli_file_pool;
2437 /** Telnet listening socket has a new connection. */
2438 static clib_error_t *
2439 unix_cli_listen_read_ready (unix_file_t * uf)
2441 unix_main_t *um = &unix_main;
2442 unix_cli_main_t *cm = &unix_cli_main;
2443 clib_socket_t *s = &um->cli_listen_socket;
2444 clib_socket_t client;
2446 clib_error_t *error;
2447 unix_cli_file_t *cf;
2450 error = clib_socket_accept (s, &client);
2454 client_name = (char *) format (0, "%U%c", format_sockaddr, &client.peer, 0);
2456 cf_index = unix_cli_file_add (cm, client_name, client.fd);
2457 cf = pool_elt_at_index (cm->cli_file_pool, cf_index);
2459 /* No longer need CLIB version of socket. */
2460 clib_socket_free (&client);
2462 vec_free (client_name);
2464 /* if we're supposed to run telnet session in character mode (default) */
2465 if (um->cli_line_mode == 0)
2468 * Set telnet client character mode, echo on, suppress "go-ahead".
2469 * Technically these should be negotiated, but this works.
2471 u8 charmode_option[] = {
2472 IAC, WONT, TELOPT_LINEMODE, /* server will do char-by-char */
2473 IAC, DONT, TELOPT_LINEMODE, /* client should do char-by-char */
2474 IAC, WILL, TELOPT_SGA, /* server willl supress GA */
2475 IAC, DO, TELOPT_SGA, /* client should supress Go Ahead */
2476 IAC, WILL, TELOPT_ECHO, /* server will do echo */
2477 IAC, DONT, TELOPT_ECHO, /* client should not echo */
2478 IAC, DO, TELOPT_TTYPE, /* client should tell us its term type */
2479 IAC, SB, TELOPT_TTYPE, 1, IAC, SE, /* now tell me ttype */
2480 IAC, DO, TELOPT_NAWS, /* client should tell us its window sz */
2481 IAC, SB, TELOPT_NAWS, 1, IAC, SE, /* now tell me window size */
2484 /* Enable history on this CLI */
2485 cf->history_limit = um->cli_history_limit;
2486 cf->has_history = cf->history_limit != 0;
2488 /* Make sure this session is in line mode */
2494 /* Setup the pager */
2495 cf->no_pager = um->cli_no_pager;
2497 uf = pool_elt_at_index (um->file_pool, cf->unix_file_index);
2499 /* Send the telnet options */
2500 unix_vlib_cli_output_raw (cf, uf, charmode_option,
2501 ARRAY_LEN (charmode_option));
2503 /* In case the client doesn't negotiate terminal type, use
2504 * a timer to kick off the initial prompt. */
2505 timer_call (unix_cli_file_welcome_timer, cf_index, 1);
2511 /** The system terminal has informed us that the window size
2515 unix_cli_resize_interrupt (int signum)
2517 unix_main_t *um = &unix_main;
2518 unix_cli_main_t *cm = &unix_cli_main;
2519 unix_cli_file_t *cf = pool_elt_at_index (cm->cli_file_pool,
2520 cm->stdin_cli_file_index);
2521 unix_file_t *uf = pool_elt_at_index (um->file_pool, cf->unix_file_index);
2525 /* Terminal resized, fetch the new size */
2526 if (ioctl (UNIX_CLI_STDIN_FD, TIOCGWINSZ, &ws) < 0)
2528 /* "Should never happen..." */
2529 clib_unix_warning ("TIOCGWINSZ");
2530 /* We can't trust ws.XXX... */
2533 cf->width = ws.ws_col;
2534 cf->height = ws.ws_row;
2536 /* Reindex the pager buffer */
2537 unix_cli_pager_reindex (cf);
2539 /* Redraw the page */
2540 unix_cli_pager_redraw (cf, uf);
2543 /** Handle configuration directives in the @em unix section. */
2544 static clib_error_t *
2545 unix_cli_config (vlib_main_t * vm, unformat_input_t * input)
2547 unix_main_t *um = &unix_main;
2548 unix_cli_main_t *cm = &unix_cli_main;
2550 clib_error_t *error = 0;
2551 unix_cli_file_t *cf;
2554 struct sigaction sa;
2558 /* We depend on unix flags being set. */
2559 if ((error = vlib_call_config_function (vm, unix_config)))
2562 if (um->flags & UNIX_FLAG_INTERACTIVE)
2564 /* Set stdin to be non-blocking. */
2565 if ((flags = fcntl (UNIX_CLI_STDIN_FD, F_GETFL, 0)) < 0)
2567 (void) fcntl (UNIX_CLI_STDIN_FD, F_SETFL, flags | O_NONBLOCK);
2569 cf_index = unix_cli_file_add (cm, "stdin", UNIX_CLI_STDIN_FD);
2570 cf = pool_elt_at_index (cm->cli_file_pool, cf_index);
2571 cm->stdin_cli_file_index = cf_index;
2573 /* If stdin is a tty and we are using chacracter mode, enable
2574 * history on the CLI and set the tty line discipline accordingly. */
2575 if (isatty (UNIX_CLI_STDIN_FD) && um->cli_line_mode == 0)
2577 /* Capture terminal resize events */
2578 memset (&sa, 0, sizeof (sa));
2579 sa.sa_handler = unix_cli_resize_interrupt;
2580 if (sigaction (SIGWINCH, &sa, 0) < 0)
2581 clib_panic ("sigaction");
2583 /* Retrieve the current terminal size */
2584 ioctl (UNIX_CLI_STDIN_FD, TIOCGWINSZ, &ws);
2585 cf->width = ws.ws_col;
2586 cf->height = ws.ws_row;
2588 if (cf->width == 0 || cf->height == 0)
2589 /* We have a tty, but no size. Stick to line mode. */
2592 /* Setup the history */
2593 cf->history_limit = um->cli_history_limit;
2594 cf->has_history = cf->history_limit != 0;
2596 /* Setup the pager */
2597 cf->no_pager = um->cli_no_pager;
2599 /* We're going to be in char by char mode */
2602 /* Save the original tty state so we can restore it later */
2603 tcgetattr (UNIX_CLI_STDIN_FD, &um->tio_stdin);
2606 /* Tweak the tty settings */
2607 tio = um->tio_stdin;
2608 /* echo off, canonical mode off, ext'd input processing off */
2609 tio.c_lflag &= ~(ECHO | ICANON | IEXTEN);
2610 tio.c_cc[VMIN] = 1; /* 1 byte at a time */
2611 tio.c_cc[VTIME] = 0; /* no timer */
2612 tcsetattr (UNIX_CLI_STDIN_FD, TCSAFLUSH, &tio);
2614 /* See if we can do ANSI/VT100 output */
2615 term = (u8 *) getenv ("TERM");
2617 cf->ansi_capable = unix_cli_terminal_type (term,
2624 /* No tty, so make sure these things are off */
2626 cf->history_limit = 0;
2627 cf->has_history = 0;
2631 /* Send banner and initial prompt */
2632 unix_cli_file_welcome (cm, cf);
2635 /* If we have socket config, LISTEN, otherwise, don't */
2636 clib_socket_t *s = &um->cli_listen_socket;
2637 if (s->config && s->config[0] != 0)
2640 unix_file_t template = { 0 };
2642 s->flags = SOCKET_IS_SERVER; /* listen, don't connect */
2643 error = clib_socket_init (s);
2648 template.read_function = unix_cli_listen_read_ready;
2649 template.file_descriptor = s->fd;
2651 unix_file_add (um, &template);
2654 /* Set CLI prompt. */
2655 if (!cm->cli_prompt)
2656 cm->cli_prompt = format (0, "VLIB: ");
2662 * This module has no configurable parameters.
2664 VLIB_CONFIG_FUNCTION (unix_cli_config, "unix-cli");
2666 /** Called when VPP is shutting down, this restores the system
2667 * terminal state if previously saved.
2669 static clib_error_t *
2670 unix_cli_exit (vlib_main_t * vm)
2672 unix_main_t *um = &unix_main;
2674 /* If stdin is a tty and we saved the tty state, reset the tty state */
2675 if (isatty (UNIX_CLI_STDIN_FD) && um->tio_isset)
2676 tcsetattr (UNIX_CLI_STDIN_FD, TCSAFLUSH, &um->tio_stdin);
2681 VLIB_MAIN_LOOP_EXIT_FUNCTION (unix_cli_exit);
2683 /** Set the CLI prompt.
2684 * @param prompt The C string to set the prompt to.
2685 * @note This setting is global; it impacts all current
2686 * and future CLI sessions.
2689 vlib_unix_cli_set_prompt (char *prompt)
2691 char *fmt = (prompt[strlen (prompt) - 1] == ' ') ? "%s" : "%s ";
2692 unix_cli_main_t *cm = &unix_cli_main;
2694 vec_free (cm->cli_prompt);
2695 cm->cli_prompt = format (0, fmt, prompt);
2698 /** CLI command to quit the terminal session.
2699 * @note If this is a stdin session then this will
2700 * shutdown VPP also.
2702 static clib_error_t *
2703 unix_cli_quit (vlib_main_t * vm,
2704 unformat_input_t * input, vlib_cli_command_t * cmd)
2706 unix_cli_main_t *cm = &unix_cli_main;
2708 vlib_process_signal_event (vm,
2709 vlib_current_process (vm),
2710 UNIX_CLI_PROCESS_EVENT_QUIT,
2711 cm->current_input_file_index);
2716 * Terminates the current CLI session.
2718 * If VPP is running in @em interactive mode and this is the console session
2719 * (that is, the session on @c stdin) then this will also terminate VPP.
2722 VLIB_CLI_COMMAND (unix_cli_quit_command, static) = {
2724 .short_help = "Exit CLI",
2725 .function = unix_cli_quit,
2729 /** CLI command to execute a VPP command script. */
2730 static clib_error_t *
2731 unix_cli_exec (vlib_main_t * vm,
2732 unformat_input_t * input, vlib_cli_command_t * cmd)
2736 unformat_input_t sub_input;
2737 clib_error_t *error;
2743 if (!unformat (input, "%s", &file_name))
2745 error = clib_error_return (0, "expecting file name, got `%U'",
2746 format_unformat_error, input);
2750 fd = open (file_name, O_RDONLY);
2753 error = clib_error_return_unix (0, "failed to open `%s'", file_name);
2757 /* Make sure its a regular file. */
2761 if (fstat (fd, &s) < 0)
2763 error = clib_error_return_unix (0, "failed to stat `%s'", file_name);
2767 if (!(S_ISREG (s.st_mode) || S_ISLNK (s.st_mode)))
2769 error = clib_error_return (0, "not a regular file `%s'", file_name);
2774 unformat_init_unix_file (&sub_input, fd);
2776 vlib_cli_input (vm, &sub_input, 0, 0);
2777 unformat_free (&sub_input);
2782 vec_free (file_name);
2788 * Executes a sequence of CLI commands which are read from a file.
2790 * If a command is unrecognised or otherwise invalid then the usual CLI
2791 * feedback will be generated, however execution of subsequent commands
2792 * from the file will continue.
2795 VLIB_CLI_COMMAND (cli_exec, static) = {
2797 .short_help = "Execute commands from file",
2798 .function = unix_cli_exec,
2803 /** CLI command to show various unix error statistics. */
2804 static clib_error_t *
2805 unix_show_errors (vlib_main_t * vm,
2806 unformat_input_t * input, vlib_cli_command_t * cmd)
2808 unix_main_t *um = &unix_main;
2809 clib_error_t *error = 0;
2810 int i, n_errors_to_show;
2811 unix_error_history_t *unix_errors = 0;
2813 n_errors_to_show = 1 << 30;
2815 if (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2817 if (!unformat (input, "%d", &n_errors_to_show))
2820 clib_error_return (0,
2821 "expecting integer number of errors to show, got `%U'",
2822 format_unformat_error, input);
2828 clib_min (ARRAY_LEN (um->error_history), n_errors_to_show);
2831 um->error_history_index >
2832 0 ? um->error_history_index - 1 : ARRAY_LEN (um->error_history) - 1;
2834 while (n_errors_to_show > 0)
2836 unix_error_history_t *eh = um->error_history + i;
2841 vec_add1 (unix_errors, eh[0]);
2842 n_errors_to_show -= 1;
2844 i = ARRAY_LEN (um->error_history) - 1;
2849 if (vec_len (unix_errors) == 0)
2850 vlib_cli_output (vm, "no Unix errors so far");
2853 vlib_cli_output (vm, "%Ld total errors seen", um->n_total_errors);
2854 for (i = vec_len (unix_errors) - 1; i >= 0; i--)
2856 unix_error_history_t *eh = vec_elt_at_index (unix_errors, i);
2857 vlib_cli_output (vm, "%U: %U",
2858 format_time_interval, "h:m:s:u", eh->time,
2859 format_clib_error, eh->error);
2861 vlib_cli_output (vm, "%U: time now",
2862 format_time_interval, "h:m:s:u", vlib_time_now (vm));
2866 vec_free (unix_errors);
2871 VLIB_CLI_COMMAND (cli_unix_show_errors, static) = {
2872 .path = "show unix-errors",
2873 .short_help = "Show Unix system call error history",
2874 .function = unix_show_errors,
2878 /** CLI command to show session command history. */
2879 static clib_error_t *
2880 unix_cli_show_history (vlib_main_t * vm,
2881 unformat_input_t * input, vlib_cli_command_t * cmd)
2883 unix_cli_main_t *cm = &unix_cli_main;
2884 unix_cli_file_t *cf;
2887 cf = pool_elt_at_index (cm->cli_file_pool, cm->current_input_file_index);
2889 if (cf->has_history && cf->history_limit)
2891 i = 1 + cf->command_number - vec_len (cf->command_history);
2892 for (j = 0; j < vec_len (cf->command_history); j++)
2893 vlib_cli_output (vm, "%d %v\n", i + j, cf->command_history[j]);
2897 vlib_cli_output (vm, "History not enabled.\n");
2904 * Displays the command history for the current session, if any.
2907 VLIB_CLI_COMMAND (cli_unix_cli_show_history, static) = {
2909 .short_help = "Show current session command history",
2910 .function = unix_cli_show_history,
2914 /** CLI command to show terminal status. */
2915 static clib_error_t *
2916 unix_cli_show_terminal (vlib_main_t * vm,
2917 unformat_input_t * input, vlib_cli_command_t * cmd)
2919 unix_main_t *um = &unix_main;
2920 unix_cli_main_t *cm = &unix_cli_main;
2921 unix_cli_file_t *cf;
2924 cf = pool_elt_at_index (cm->cli_file_pool, cm->current_input_file_index);
2925 n = vlib_get_node (vm, cf->process_node_index);
2927 vlib_cli_output (vm, "Terminal name: %v\n", n->name);
2928 vlib_cli_output (vm, "Terminal mode: %s\n", cf->line_mode ?
2929 "line-by-line" : "char-by-char");
2930 vlib_cli_output (vm, "Terminal width: %d\n", cf->width);
2931 vlib_cli_output (vm, "Terminal height: %d\n", cf->height);
2932 vlib_cli_output (vm, "ANSI capable: %s\n",
2933 cf->ansi_capable ? "yes" : "no");
2934 vlib_cli_output (vm, "History enabled: %s%s\n",
2935 cf->has_history ? "yes" : "no", !cf->has_history
2936 || cf->history_limit ? "" :
2937 " (disabled by history limit)");
2938 if (cf->has_history)
2939 vlib_cli_output (vm, "History limit: %d\n", cf->history_limit);
2940 vlib_cli_output (vm, "Pager enabled: %s%s%s\n",
2941 cf->no_pager ? "no" : "yes",
2943 || cf->height ? "" : " (disabled by terminal height)",
2945 || um->cli_pager_buffer_limit ? "" :
2946 " (disabled by buffer limit)");
2948 vlib_cli_output (vm, "Pager limit: %d\n", um->cli_pager_buffer_limit);
2949 vlib_cli_output (vm, "CRLF mode: %s\n",
2950 cf->crlf_mode ? "CR+LF" : "LF");
2956 * Displays various information about the state of the current terminal
2960 * @cliexstart{show terminal}
2961 * Terminal name: unix-cli-stdin
2962 * Terminal mode: char-by-char
2963 * Terminal width: 123
2964 * Terminal height: 48
2966 * History enabled: yes
2968 * Pager enabled: yes
2969 * Pager limit: 100000
2974 VLIB_CLI_COMMAND (cli_unix_cli_show_terminal, static) = {
2975 .path = "show terminal",
2976 .short_help = "Show current session terminal settings",
2977 .function = unix_cli_show_terminal,
2981 /** CLI command to set terminal pager settings. */
2982 static clib_error_t *
2983 unix_cli_set_terminal_pager (vlib_main_t * vm,
2984 unformat_input_t * input,
2985 vlib_cli_command_t * cmd)
2987 unix_main_t *um = &unix_main;
2988 unix_cli_main_t *cm = &unix_cli_main;
2989 unix_cli_file_t *cf;
2990 unformat_input_t _line_input, *line_input = &_line_input;
2991 clib_error_t *error = 0;
2993 if (!unformat_user (input, unformat_line_input, line_input))
2996 cf = pool_elt_at_index (cm->cli_file_pool, cm->current_input_file_index);
2998 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3000 if (unformat (line_input, "on"))
3002 else if (unformat (line_input, "off"))
3004 else if (unformat (line_input, "limit %u", &um->cli_pager_buffer_limit))
3005 vlib_cli_output (vm,
3006 "Pager limit set to %u lines; note, this is global.\n",
3007 um->cli_pager_buffer_limit);
3010 error = clib_error_return (0, "unknown parameter: `%U`",
3011 format_unformat_error, line_input);
3017 unformat_free (line_input);
3023 * Enables or disables the terminal pager for this session. Generally
3024 * this defaults to enabled.
3026 * Additionally allows the pager buffer size to be set; though note that
3027 * this value is set globally and not per session.
3030 VLIB_CLI_COMMAND (cli_unix_cli_set_terminal_pager, static) = {
3031 .path = "set terminal pager",
3032 .short_help = "set terminal pager [on|off] [limit <lines>]",
3033 .function = unix_cli_set_terminal_pager,
3037 /** CLI command to set terminal history settings. */
3038 static clib_error_t *
3039 unix_cli_set_terminal_history (vlib_main_t * vm,
3040 unformat_input_t * input,
3041 vlib_cli_command_t * cmd)
3043 unix_cli_main_t *cm = &unix_cli_main;
3044 unix_cli_file_t *cf;
3045 unformat_input_t _line_input, *line_input = &_line_input;
3047 clib_error_t *error = 0;
3049 if (!unformat_user (input, unformat_line_input, line_input))
3052 cf = pool_elt_at_index (cm->cli_file_pool, cm->current_input_file_index);
3054 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3056 if (unformat (line_input, "on"))
3057 cf->has_history = 1;
3058 else if (unformat (line_input, "off"))
3059 cf->has_history = 0;
3060 else if (unformat (line_input, "limit %u", &cf->history_limit))
3064 error = clib_error_return (0, "unknown parameter: `%U`",
3065 format_unformat_error, line_input);
3069 /* If we reduced history size, or turned it off, purge the history */
3070 limit = cf->has_history ? cf->history_limit : 0;
3072 while (cf->command_history && vec_len (cf->command_history) >= limit)
3074 vec_free (cf->command_history[0]);
3075 vec_delete (cf->command_history, 1, 0);
3080 unformat_free (line_input);
3086 * Enables or disables the command history function of the current
3087 * terminal. Generally this defaults to enabled.
3089 * This command also allows the maximum size of the history buffer for
3090 * this session to be altered.
3093 VLIB_CLI_COMMAND (cli_unix_cli_set_terminal_history, static) = {
3094 .path = "set terminal history",
3095 .short_help = "set terminal history [on|off] [limit <lines>]",
3096 .function = unix_cli_set_terminal_history,
3100 /** CLI command to set terminal ANSI settings. */
3101 static clib_error_t *
3102 unix_cli_set_terminal_ansi (vlib_main_t * vm,
3103 unformat_input_t * input,
3104 vlib_cli_command_t * cmd)
3106 unix_cli_main_t *cm = &unix_cli_main;
3107 unix_cli_file_t *cf;
3109 cf = pool_elt_at_index (cm->cli_file_pool, cm->current_input_file_index);
3111 if (unformat (input, "on"))
3112 cf->ansi_capable = 1;
3113 else if (unformat (input, "off"))
3114 cf->ansi_capable = 0;
3116 return clib_error_return (0, "unknown parameter: `%U`",
3117 format_unformat_error, input);
3123 * Enables or disables the use of ANSI control sequences by this terminal.
3124 * The default will vary based on terminal detection at the start of the
3127 * ANSI control sequences are used in a small number of places to provide,
3128 * for example, color text output and to control the cursor in the pager.
3131 VLIB_CLI_COMMAND (cli_unix_cli_set_terminal_ansi, static) = {
3132 .path = "set terminal ansi",
3133 .short_help = "set terminal ansi [on|off]",
3134 .function = unix_cli_set_terminal_ansi,
3138 static clib_error_t *
3139 unix_cli_init (vlib_main_t * vm)
3144 VLIB_INIT_FUNCTION (unix_cli_init);
3147 * fd.io coding-style-patch-verification: ON
3150 * eval: (c-set-style "gnu")