FD.io VPP  v19.08.3-2-gbabecb413
Vector Packet Processing
cli.c
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1 /*
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:
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
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.
14  */
15 /*
16  * cli.c: Unix stdin/socket CLI.
17  *
18  * Copyright (c) 2008 Eliot Dresselhaus
19  *
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:
27  *
28  * The above copyright notice and this permission notice shall be
29  * included in all copies or substantial portions of the Software.
30  *
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.
38  */
39 /**
40  * @file
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.
44  */
45 /*? %%clicmd:group_label Command line session %% ?*/
46 /*? %%syscfg:group_label Command line session %% ?*/
47 
48 #include <vlib/vlib.h>
49 #include <vlib/unix/unix.h>
50 
51 #include <ctype.h>
52 #include <fcntl.h>
53 #include <sys/stat.h>
54 #include <termios.h>
55 #include <signal.h>
56 #include <unistd.h>
57 #include <arpa/telnet.h>
58 #include <sys/ioctl.h>
59 #include <sys/types.h>
60 #include <unistd.h>
61 #include <limits.h>
62 #include <netinet/tcp.h>
63 #include <math.h>
64 
65 /** ANSI escape code. */
66 #define ESC "\x1b"
67 
68 /** ANSI Control Sequence Introducer. */
69 #define CSI ESC "["
70 
71 /** ANSI clear screen. */
72 #define ANSI_CLEAR CSI "2J" CSI "1;1H"
73 /** ANSI reset color settings. */
74 #define ANSI_RESET CSI "0m"
75 /** ANSI Start bold text. */
76 #define ANSI_BOLD CSI "1m"
77 /** ANSI Stop bold text. */
78 #define ANSI_DIM CSI "2m"
79 /** ANSI Start dark red text. */
80 #define ANSI_DRED ANSI_DIM CSI "31m"
81 /** ANSI Start bright red text. */
82 #define ANSI_BRED ANSI_BOLD CSI "31m"
83 /** ANSI clear line cursor is on. */
84 #define ANSI_CLEARLINE CSI "2K"
85 /** ANSI scroll screen down one line. */
86 #define ANSI_SCROLLDN CSI "1T"
87 /** ANSI save cursor position. */
88 #define ANSI_SAVECURSOR CSI "s"
89 /** ANSI restore cursor position if previously saved. */
90 #define ANSI_RESTCURSOR CSI "u"
91 
92 /** Maximum depth into a byte stream from which to compile a Telnet
93  * protocol message. This is a safety measure. */
94 #define UNIX_CLI_MAX_DEPTH_TELNET 24
95 
96 /** Maximum terminal width we will accept */
97 #define UNIX_CLI_MAX_TERMINAL_WIDTH 512
98 /** Maximum terminal height we will accept */
99 #define UNIX_CLI_MAX_TERMINAL_HEIGHT 512
100 /** Default terminal height */
101 #define UNIX_CLI_DEFAULT_TERMINAL_HEIGHT 24
102 /** Default terminal width */
103 #define UNIX_CLI_DEFAULT_TERMINAL_WIDTH 80
104 
105 /** A CLI banner line. */
106 typedef struct
107 {
108  u8 *line; /**< The line to print. */
109  u32 length; /**< The length of the line without terminating NUL. */
111 
112 #define _(a) { .line = (u8 *)(a), .length = sizeof(a) - 1 }
113 /** Plain welcome banner. */
114 static unix_cli_banner_t unix_cli_banner[] = {
115  _(" _______ _ _ _____ ___ \n"),
116  _(" __/ __/ _ \\ (_)__ | | / / _ \\/ _ \\\n"),
117  _(" _/ _// // / / / _ \\ | |/ / ___/ ___/\n"),
118  _(" /_/ /____(_)_/\\___/ |___/_/ /_/ \n"),
119  _("\n")
120 };
121 
122 /** ANSI color welcome banner. */
123 static unix_cli_banner_t unix_cli_banner_color[] = {
124  _(ANSI_BRED " _______ _ " ANSI_RESET " _ _____ ___ \n"),
125  _(ANSI_BRED " __/ __/ _ \\ (_)__ " ANSI_RESET " | | / / _ \\/ _ \\\n"),
126  _(ANSI_BRED " _/ _// // / / / _ \\" ANSI_RESET " | |/ / ___/ ___/\n"),
127  _(ANSI_BRED " /_/ /____(_)_/\\___/" ANSI_RESET " |___/_/ /_/ \n"),
128  _("\n")
129 };
130 
131 #undef _
132 
133 /** Pager line index */
134 typedef struct
135 {
136  /** Index into pager_vector */
138 
139  /** Offset of the string in the line */
141 
142  /** Length of the string in the line */
145 
146 
147 /** Unix CLI session. */
148 typedef struct
149 {
150  /** The file index held by unix.c */
152 
153  /** Vector of output pending write to file descriptor. */
155 
156  /** Vector of input saved by Unix input node to be processed by
157  CLI process. */
159 
160  /** This session has command history. */
162  /** Array of vectors of commands in the history. */
164  /** The command currently pointed at by the history cursor. */
166  /** How far from the end of the history array the user has browsed. */
168 
169  /** Maximum number of history entries this session will store. */
171 
172  /** Current command line counter */
174 
175  /** The string being searched for in the history. */
177  /** If non-zero then the CLI is searching in the history array.
178  * - @c -1 means search backwards.
179  * - @c 1 means search forwards.
180  */
182 
183  /** Position of the insert cursor on the current input line */
185 
186  /** Line mode or char mode */
188 
189  /** Set if the CRLF mode wants CR + LF */
191 
192  /** Can we do ANSI output? */
194 
195  /** Has the session started? */
197 
198  /** Disable the pager? */
200 
201  /** Whether the session is interactive or not.
202  * Controls things like initial banner, the CLI prompt etc. */
204 
205  /** Whether the session is attached to a socket. */
207 
208  /** If EPIPE has been detected, prevent further write-related
209  * activity on the descriptor.
210  */
212 
213  /** Pager buffer */
215 
216  /** Index of line fragments in the pager buffer */
218 
219  /** Line number of top of page */
221 
222  /** Terminal width */
224 
225  /** Terminal height */
227 
228  /** Process node identifier */
230 
231  /** The current direction of cursor travel.
232  * This is important since when advancing left-to-right, at the
233  * right hand edge of the console the terminal typically defers
234  * wrapping the cursor to the next line until a character is
235  * actually displayed.
236  * This messes up our heuristic for whether to use ANSI to return
237  * the cursor to the end of the line and instead we have to
238  * nudge the cursor to the next line.
239  * A Value of @c 0 means we're advancing left-to-right; @c 1 means
240  * the opposite.
241  */
243 
245 
246 /** Resets the pager buffer and other data.
247  * @param f The CLI session whose pager needs to be reset.
248  */
249 always_inline void
251 {
252  u8 **p;
253 
254  f->pager_start = 0;
255 
256  vec_free (f->pager_index);
257  f->pager_index = 0;
258 
259  vec_foreach (p, f->pager_vector)
260  {
261  vec_free (*p);
262  }
263  vec_free (f->pager_vector);
264  f->pager_vector = 0;
265 }
266 
267 /** Release storage used by a CLI session.
268  * @param f The CLI session whose storage needs to be released.
269  */
270 always_inline void
272 {
273  vec_free (f->output_vector);
274  vec_free (f->input_vector);
276 }
277 
278 /** CLI actions */
279 typedef enum
280 {
281  UNIX_CLI_PARSE_ACTION_NOACTION = 0, /**< No action */
282  UNIX_CLI_PARSE_ACTION_CRLF, /**< Carriage return, newline or enter */
283  UNIX_CLI_PARSE_ACTION_TAB, /**< Tab key */
284  UNIX_CLI_PARSE_ACTION_ERASE, /**< Erase cursor left */
285  UNIX_CLI_PARSE_ACTION_ERASERIGHT, /**< Erase cursor right */
286  UNIX_CLI_PARSE_ACTION_UP, /**< Up arrow */
287  UNIX_CLI_PARSE_ACTION_DOWN, /**< Down arrow */
288  UNIX_CLI_PARSE_ACTION_LEFT, /**< Left arrow */
289  UNIX_CLI_PARSE_ACTION_RIGHT, /**< Right arrow */
290  UNIX_CLI_PARSE_ACTION_HOME, /**< Home key (jump to start of line) */
291  UNIX_CLI_PARSE_ACTION_END, /**< End key (jump to end of line) */
292  UNIX_CLI_PARSE_ACTION_WORDLEFT, /**< Jump cursor to start of left word */
293  UNIX_CLI_PARSE_ACTION_WORDRIGHT, /**< Jump cursor to start of right word */
294  UNIX_CLI_PARSE_ACTION_ERASELINELEFT, /**< Erase line to left of cursor */
295  UNIX_CLI_PARSE_ACTION_ERASELINERIGHT, /**< Erase line to right & including cursor */
296  UNIX_CLI_PARSE_ACTION_ERASEWORDLEFT, /**< Erase word left */
297  UNIX_CLI_PARSE_ACTION_CLEAR, /**< Clear the terminal */
298  UNIX_CLI_PARSE_ACTION_REVSEARCH, /**< Search backwards in command history */
299  UNIX_CLI_PARSE_ACTION_FWDSEARCH, /**< Search forwards in command history */
300  UNIX_CLI_PARSE_ACTION_YANK, /**< Undo last erase action */
301  UNIX_CLI_PARSE_ACTION_TELNETIAC, /**< Telnet control code */
302 
303  UNIX_CLI_PARSE_ACTION_PAGER_CRLF, /**< Enter pressed (CR, CRLF, LF, etc) */
304  UNIX_CLI_PARSE_ACTION_PAGER_QUIT, /**< Exit the pager session */
305  UNIX_CLI_PARSE_ACTION_PAGER_NEXT, /**< Scroll to next page */
306  UNIX_CLI_PARSE_ACTION_PAGER_DN, /**< Scroll to next line */
307  UNIX_CLI_PARSE_ACTION_PAGER_UP, /**< Scroll to previous line */
308  UNIX_CLI_PARSE_ACTION_PAGER_TOP, /**< Scroll to first line */
309  UNIX_CLI_PARSE_ACTION_PAGER_BOTTOM, /**< Scroll to last line */
310  UNIX_CLI_PARSE_ACTION_PAGER_PGDN, /**< Scroll to next page */
311  UNIX_CLI_PARSE_ACTION_PAGER_PGUP, /**< Scroll to previous page */
312  UNIX_CLI_PARSE_ACTION_PAGER_REDRAW, /**< Clear and redraw the page on the terminal */
313  UNIX_CLI_PARSE_ACTION_PAGER_SEARCH, /**< Search the pager buffer */
314 
315  UNIX_CLI_PARSE_ACTION_PARTIALMATCH, /**< Action parser found a partial match */
316  UNIX_CLI_PARSE_ACTION_NOMATCH /**< Action parser did not find any match */
318 
319 /** @brief Mapping of input buffer strings to action values.
320  * @note This won't work as a hash since we need to be able to do
321  * partial matches on the string.
322  */
323 typedef struct
324 {
325  u8 *input; /**< Input string to match. */
326  u32 len; /**< Length of input without final NUL. */
327  unix_cli_parse_action_t action; /**< Action to take when matched. */
329 
330 /** @brief Given a capital ASCII letter character return a @c NUL terminated
331  * string with the control code for that letter.
332  *
333  * @param c An ASCII character.
334  * @return A @c NUL terminated string of type @c u8[].
335  *
336  * @par Example
337  * @c CTL('A') returns <code>{ 0x01, 0x00 }</code> as a @c u8[].
338  */
339 #define CTL(c) (u8[]){ (c) - '@', 0 }
340 
341 #define _(a,b) { .input = (u8 *)(a), .len = sizeof(a) - 1, .action = (b) }
342 /**
343  * Patterns to match on a CLI input stream.
344  * @showinitializer
345  */
346 static unix_cli_parse_actions_t unix_cli_parse_strings[] = {
347  /* Line handling */
348  _("\r\n", UNIX_CLI_PARSE_ACTION_CRLF), /* Must be before '\r' */
350  _("\r\0", UNIX_CLI_PARSE_ACTION_CRLF), /* Telnet does this */
352 
353  /* Unix shell control codes */
356  _(CTL ('P'), UNIX_CLI_PARSE_ACTION_UP),
359  _(CTL ('E'), UNIX_CLI_PARSE_ACTION_END),
366  _(ESC "b", UNIX_CLI_PARSE_ACTION_WORDLEFT), /* Alt-B */
367  _(ESC "f", UNIX_CLI_PARSE_ACTION_WORDRIGHT), /* Alt-F */
368  _("\b", UNIX_CLI_PARSE_ACTION_ERASE), /* ^H */
369  _("\x7f", UNIX_CLI_PARSE_ACTION_ERASE), /* Backspace */
370  _("\t", UNIX_CLI_PARSE_ACTION_TAB), /* ^I */
371 
372  /* VT100 Normal mode - Broadest support */
379  _(CSI "3~", UNIX_CLI_PARSE_ACTION_ERASERIGHT), /* Delete */
380  _(CSI "1;5D", UNIX_CLI_PARSE_ACTION_WORDLEFT), /* C-Left */
381  _(CSI "1;5C", UNIX_CLI_PARSE_ACTION_WORDRIGHT), /* C-Right */
382 
383  /* VT100 Application mode - Some Gnome Terminal functions use these */
384  _(ESC "OA", UNIX_CLI_PARSE_ACTION_UP),
390 
391  /* ANSI X3.41-1974 - sent by Microsoft Telnet and PuTTY */
394 
395  /* Emacs-ish history search */
398 
399  /* Other protocol things */
400  _("\xff", UNIX_CLI_PARSE_ACTION_TELNETIAC), /* IAC */
401  _("\0", UNIX_CLI_PARSE_ACTION_NOACTION), /* NUL */
403 };
404 
405 /**
406  * Patterns to match when a CLI session is in the pager.
407  * @showinitializer
408  */
409 static unix_cli_parse_actions_t unix_cli_parse_pager[] = {
410  /* Line handling */
411  _("\r\n", UNIX_CLI_PARSE_ACTION_PAGER_CRLF), /* Must be before '\r' */
413  _("\r\0", UNIX_CLI_PARSE_ACTION_PAGER_CRLF), /* Telnet does this */
415 
416  /* Pager commands */
422 
423  /* VT100 */
428 
429  /* VT100 Application mode */
434 
435  /* ANSI X3.41-1974 */
440 
441  /* Other protocol things */
442  _("\xff", UNIX_CLI_PARSE_ACTION_TELNETIAC), /* IAC */
443  _("\0", UNIX_CLI_PARSE_ACTION_NOACTION), /* NUL */
445 };
446 
447 #undef _
448 
449 /** CLI session events. */
450 typedef enum
451 {
452  UNIX_CLI_PROCESS_EVENT_READ_READY, /**< A file descriptor has data to be read. */
453  UNIX_CLI_PROCESS_EVENT_QUIT, /**< A CLI session wants to close. */
455 
456 /** CLI session telnet negotiation timer events. */
457 typedef enum
458 {
459  UNIX_CLI_NEW_SESSION_EVENT_ADD, /**< Add a CLI session to the new session list */
461 
462 /** Each new session is stored on a list with a deadline after which
463  * a prompt is issued, in case the session TELNET negotiation fails to
464  * complete. */
465 typedef struct
466 {
467  uword cf_index; /**< Session index of the new session. */
468  f64 deadline; /**< Deadline after which the new session must have a prompt. */
470 
471 /** CLI global state. */
472 typedef struct
473 {
474  /** Prompt string for CLI. */
476 
477  /** Vec pool of CLI sessions. */
479 
480  /** Vec pool of unused session indices. */
482 
483  /** The session index of the stdin cli */
485 
486  /** File pool index of current input. */
488 
489  /** New session process node identifier */
491 
492  /** List of new sessions */
495 
496 /** CLI global state */
498 
499 /**
500  * @brief Search for a byte sequence in the action list.
501  *
502  * Searches the @ref unix_cli_parse_actions_t list in @a a for a match with
503  * the bytes in @a input of maximum length @a ilen bytes.
504  * When a match is made @a *matched indicates how many bytes were matched.
505  * Returns a value from the enum @ref unix_cli_parse_action_t to indicate
506  * whether no match was found, a partial match was found or a complete
507  * match was found and what action, if any, should be taken.
508  *
509  * @param[in] a Actions list to search within.
510  * @param[in] input String fragment to search for.
511  * @param[in] ilen Length of the string in 'input'.
512  * @param[out] matched Pointer to an integer that will contain the number
513  * of bytes matched when a complete match is found.
514  *
515  * @return Action from @ref unix_cli_parse_action_t that the string fragment
516  * matches.
517  * @ref UNIX_CLI_PARSE_ACTION_PARTIALMATCH is returned when the
518  * whole input string matches the start of at least one action.
519  * @ref UNIX_CLI_PARSE_ACTION_NOMATCH is returned when there is no
520  * match at all.
521  */
524  u8 * input, u32 ilen, i32 * matched)
525 {
526  u8 partial = 0;
527 
528  while (a->input)
529  {
530  if (ilen >= a->len)
531  {
532  /* see if the start of the input buffer exactly matches the current
533  * action string. */
534  if (memcmp (input, a->input, a->len) == 0)
535  {
536  *matched = a->len;
537  return a->action;
538  }
539  }
540  else
541  {
542  /* if the first ilen characters match, flag this as a partial -
543  * meaning keep collecting bytes in case of a future match */
544  if (memcmp (input, a->input, ilen) == 0)
545  partial = 1;
546  }
547 
548  /* check next action */
549  a++;
550  }
551 
552  return partial ?
554 }
555 
556 
557 /** Add bytes to the output vector and then flagg the I/O system that bytes
558  * are available to be sent.
559  */
560 static void
562  unix_cli_file_t * cf,
563  u8 * buffer, uword buffer_bytes)
564 {
566 
567  vec_add (cf->output_vector, buffer, buffer_bytes);
568  if (vec_len (cf->output_vector) > 0)
569  {
570  int skip_update = 0 != (uf->flags & UNIX_FILE_DATA_AVAILABLE_TO_WRITE);
572  if (!skip_update)
574  }
575 }
576 
577 /** Delete all bytes from the output vector and flag the I/O system
578  * that no more bytes are available to be sent.
579  */
580 static void
582  unix_cli_file_t * cf, uword n_bytes)
583 {
585 
586  vec_delete (cf->output_vector, n_bytes, 0);
587  if (vec_len (cf->output_vector) <= 0)
588  {
589  int skip_update = 0 == (uf->flags & UNIX_FILE_DATA_AVAILABLE_TO_WRITE);
591  if (!skip_update)
593  }
594 }
595 
596 /** @brief A bit like strchr with a buffer length limit.
597  * Search a buffer for the first instance of a character up to the limit of
598  * the buffer length. If found then return the position of that character.
599  *
600  * The key departure from strchr is that if the character is not found then
601  * return the buffer length.
602  *
603  * @param chr The byte value to search for.
604  * @param str The buffer in which to search for the value.
605  * @param len The depth into the buffer to search.
606  *
607  * @return The index of the first occurrence of \c chr. If \c chr is not
608  * found then \c len instead.
609  */
612 {
613  word i = 0;
614  for (i = 0; i < len; i++, str++)
615  {
616  if (*str == chr)
617  return i;
618  }
619  return len;
620 }
621 
622 /** @brief Send a buffer to the CLI stream if possible, enqueue it otherwise.
623  * Attempts to write given buffer to the file descriptor of the given
624  * Unix CLI session. If that session already has data in the output buffer
625  * or if the write attempt tells us to try again later then the given buffer
626  * is appended to the pending output buffer instead.
627  *
628  * This is typically called only from \c unix_vlib_cli_output_cooked since
629  * that is where CRLF handling occurs or from places where we explicitly do
630  * not want cooked handling.
631  *
632  * @param cf Unix CLI session of the desired stream to write to.
633  * @param uf The Unix file structure of the desired stream to write to.
634  * @param buffer Pointer to the buffer that needs to be written.
635  * @param buffer_bytes The number of bytes from \c buffer to write.
636  */
637 static void
639  clib_file_t * uf, u8 * buffer, uword buffer_bytes)
640 {
641  int n = 0;
642 
643  if (cf->has_epipe) /* don't try writing anything */
644  return;
645 
646  if (vec_len (cf->output_vector) == 0)
647  {
648  if (cf->is_socket)
649  /* If it's a socket we use MSG_NOSIGNAL to prevent SIGPIPE */
650  n = send (uf->file_descriptor, buffer, buffer_bytes, MSG_NOSIGNAL);
651  else
652  n = write (uf->file_descriptor, buffer, buffer_bytes);
653  }
654 
655  if (n < 0 && errno != EAGAIN)
656  {
657  if (errno == EPIPE)
658  {
659  /* connection closed on us */
660  unix_main_t *um = &unix_main;
661  cf->has_epipe = 1;
664  uf->private_data);
665  }
666  else
667  {
668  clib_unix_warning ("write");
669  }
670  }
671  else if ((word) n < (word) buffer_bytes)
672  {
673  /* We got EAGAIN or we already have stuff in the buffer;
674  * queue up whatever didn't get sent for later. */
675  if (n < 0)
676  n = 0;
677  unix_cli_add_pending_output (uf, cf, buffer + n, buffer_bytes - n);
678  }
679 }
680 
681 /** @brief Process a buffer for CRLF handling before outputting it to the CLI.
682  *
683  * @param cf Unix CLI session of the desired stream to write to.
684  * @param uf The Unix file structure of the desired stream to write to.
685  * @param buffer Pointer to the buffer that needs to be written.
686  * @param buffer_bytes The number of bytes from \c buffer to write.
687  */
688 static void
690  clib_file_t * uf,
691  u8 * buffer, uword buffer_bytes)
692 {
693  word end = 0, start = 0;
694 
695  while (end < buffer_bytes)
696  {
697  if (cf->crlf_mode)
698  {
699  /* iterate the line on \n's so we can insert a \r before it */
700  end = unix_vlib_findchr ('\n',
701  buffer + start,
702  buffer_bytes - start) + start;
703  }
704  else
705  {
706  /* otherwise just send the whole buffer */
707  end = buffer_bytes;
708  }
709 
710  unix_vlib_cli_output_raw (cf, uf, buffer + start, end - start);
711 
712  if (cf->crlf_mode)
713  {
714  if (end < buffer_bytes)
715  {
716  unix_vlib_cli_output_raw (cf, uf, (u8 *) "\r\n", 2);
717  end++; /* skip the \n that we already sent */
718  }
719  start = end;
720  }
721  }
722 
723  /* Use the last character to determine the last direction of the cursor. */
724  if (buffer_bytes > 0)
725  cf->cursor_direction = (buffer[buffer_bytes - 1] == (u8) '\b');
726 }
727 
728 /** @brief Moves the terminal cursor one character to the left, with
729  * special handling when it reaches the left edge of the terminal window.
730  *
731  * Ordinarily we can simply send a '\b' to move the cursor left, however
732  * most terminals will not reverse-wrap to the end of the previous line
733  * if the cursor is in the left-most column. To counter this we must
734  * check the cursor position + prompt length modulo terminal width and
735  * if available use some other means, such as ANSI terminal escape
736  * sequences, to move the cursor.
737  *
738  * @param cf Unix CLI session of the desired stream to write to.
739  * @param uf The Unix file structure of the desired stream to write to.
740  */
741 static void
743 {
745  static u8 *ansi = 0; /* assumes no reentry */
746  u32 position;
747 
748  if (!cf->is_interactive || !cf->ansi_capable || !cf->width)
749  {
750  /* No special handling for dumb terminals */
751  unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b", 1);
752  return;
753  }
754 
755  position = ((u32) vec_len (cm->cli_prompt) + cf->cursor) % cf->width;
756 
757  if (position != 0)
758  {
759  /* No special handling required if we're not at the left edge */
760  unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\b", 1);
761  return;
762  }
763 
764  if (!cf->cursor_direction)
765  {
766  /* Special handling for when we are at the left edge but
767  * the cursor was going left-to-right, but in this situation
768  * xterm-like terminals actually hide the cursor off the right
769  * edge. A \b here seems to jump one char too many, so let's
770  * force the cursor onto the next line instead.
771  */
772  if (cf->cursor < vec_len (cf->current_command))
774  1);
775  else
776  unix_vlib_cli_output_cooked (cf, uf, (u8 *) " ", 1);
777  unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\r", 1);
778  }
779 
780  /* Relocate the cursor at the right hand edge one line above */
781  ansi = format (ansi, CSI "A" CSI "%dC", cf->width - 1);
782  unix_vlib_cli_output_cooked (cf, uf, ansi, vec_len (ansi));
783  vec_reset_length (ansi); /* keep the vec around for next time */
784  cf->cursor_direction = 1; /* going backwards now */
785 }
786 
787 /** @brief Output the CLI prompt */
788 static void
790 {
792 
793  if (cf->is_interactive) /* Only interactive sessions get a prompt */
795  vec_len (cm->cli_prompt));
796 }
797 
798 /** @brief Output a pager prompt and show number of buffered lines */
799 static void
801 {
802  u8 *prompt;
803  u32 h;
804 
805  h = cf->pager_start + (cf->height - 1);
806  if (h > vec_len (cf->pager_index))
807  h = vec_len (cf->pager_index);
808 
809  prompt = format (0, "\r%s-- more -- (%d-%d/%d)%s",
810  cf->ansi_capable ? ANSI_BOLD : "",
811  cf->pager_start + 1,
812  h,
813  vec_len (cf->pager_index),
814  cf->ansi_capable ? ANSI_RESET : "");
815 
816  unix_vlib_cli_output_cooked (cf, uf, prompt, vec_len (prompt));
817 
818  vec_free (prompt);
819 }
820 
821 /** @brief Output a pager "skipping" message */
822 static void
824  char *message, char *postfix)
825 {
826  u8 *prompt;
827 
828  prompt = format (0, "\r%s-- %s --%s%s",
829  cf->ansi_capable ? ANSI_BOLD : "",
830  message, cf->ansi_capable ? ANSI_RESET : "", postfix);
831 
832  unix_vlib_cli_output_cooked (cf, uf, prompt, vec_len (prompt));
833 
834  vec_free (prompt);
835 }
836 
837 /** @brief Erase the printed pager prompt */
838 static void
840 {
841  if (cf->ansi_capable)
842  {
843  unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\r", 1);
845  (u8 *) ANSI_CLEARLINE,
846  sizeof (ANSI_CLEARLINE) - 1);
847  }
848  else
849  {
850  int i;
851 
852  unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\r", 1);
853  for (i = 0; i < cf->width - 1; i++)
854  unix_vlib_cli_output_cooked (cf, uf, (u8 *) " ", 1);
855  unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\r", 1);
856  }
857 }
858 
859 /** @brief Uses an ANSI escape sequence to move the cursor */
860 static void
862 {
863  u8 *str;
864 
865  str = format (0, "%s%d;%dH", CSI, y, x);
866 
867  unix_vlib_cli_output_cooked (cf, uf, str, vec_len (str));
868 
869  vec_free (str);
870 }
871 
872 /** Redraw the currently displayed page of text.
873  * @param cf CLI session to redraw the pager buffer of.
874  * @param uf Unix file of the CLI session.
875  */
876 static void
878 {
879  unix_cli_pager_index_t *pi = NULL;
880  u8 *line = NULL;
881  word i;
882 
883  /* No active pager? Do nothing. */
884  if (!vec_len (cf->pager_index))
885  return;
886 
887  if (cf->ansi_capable)
888  {
889  /* If we have ANSI, send the clear screen sequence */
891  (u8 *) ANSI_CLEAR,
892  sizeof (ANSI_CLEAR) - 1);
893  }
894  else
895  {
896  /* Otherwise make sure we're on a blank line */
898  }
899 
900  /* (Re-)send the current page of content */
901  for (i = 0; i < cf->height - 1 &&
902  i + cf->pager_start < vec_len (cf->pager_index); i++)
903  {
904  pi = &cf->pager_index[cf->pager_start + i];
905  line = cf->pager_vector[pi->line] + pi->offset;
906 
907  unix_vlib_cli_output_cooked (cf, uf, line, pi->length);
908  }
909  /* if the last line didn't end in newline, add a newline */
910  if (pi && line[pi->length - 1] != '\n')
911  unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1);
912 
913  unix_cli_pager_prompt (cf, uf);
914 }
915 
916 /** @brief Process and add a line to the pager index.
917  * In normal operation this function will take the given character string
918  * found in @c line and with length @c len_or_index and iterates the over the
919  * contents, adding each line of text discovered within it to the
920  * pager index. Lines are identified by newlines ("<code>\\n</code>") and by
921  * strings longer than the width of the terminal.
922  *
923  * If instead @c line is @c NULL then @c len_or_index is taken to mean the
924  * index of an existing line in the pager buffer; this simply means that the
925  * input line does not need to be cloned since we already have it. This is
926  * typical if we are reindexing the pager buffer.
927  *
928  * @param cf The CLI session whose pager we are adding to.
929  * @param line The string of text to be indexed into the pager buffer.
930  * If @c line is @c NULL then the mode of operation
931  * changes slightly; see the description above.
932  * @param len_or_index If @c line is a pointer to a string then this parameter
933  * indicates the length of that string; Otherwise this
934  * value provides the index in the pager buffer of an
935  * existing string to be indexed.
936  */
937 static void
938 unix_cli_pager_add_line (unix_cli_file_t * cf, u8 * line, word len_or_index)
939 {
940  u8 *p = NULL;
941  word i, j, k;
942  word line_index, len;
943  u32 width = cf->width;
945 
946  if (line == NULL)
947  {
948  /* Use a line already in the pager buffer */
949  line_index = len_or_index;
950  if (cf->pager_vector != NULL)
951  p = cf->pager_vector[line_index];
952  len = vec_len (p);
953  }
954  else
955  {
956  len = len_or_index;
957  /* Add a copy of the raw string to the pager buffer */
958  p = vec_new (u8, len);
959  clib_memcpy (p, line, len);
960 
961  /* store in pager buffer */
962  line_index = vec_len (cf->pager_vector);
963  vec_add1 (cf->pager_vector, p);
964  }
965 
966  i = 0;
967  while (i < len)
968  {
969  /* Find the next line, or run to terminal width, or run to EOL */
970  int l = len - i;
971  j = unix_vlib_findchr ((u8) '\n', p, l < width ? l : width);
972 
973  if (j < l && p[j] == '\n') /* incl \n */
974  j++;
975 
976  /* Add the line to the index */
977  k = vec_len (cf->pager_index);
978  vec_validate (cf->pager_index, k);
979  pi = &cf->pager_index[k];
980 
981  pi->line = line_index;
982  pi->offset = i;
983  pi->length = j;
984 
985  i += j;
986  p += j;
987  }
988 }
989 
990 /** @brief Reindex entire pager buffer.
991  * Resets the current pager index and then re-adds the lines in the pager
992  * buffer to the index.
993  *
994  * Additionally this function attempts to retain the current page start
995  * line offset by searching for the same top-of-screen line in the new index.
996  *
997  * @param cf The CLI session whose pager buffer should be reindexed.
998  */
999 static void
1001 {
1002  word i, old_line, old_offset;
1004 
1005  /* If there is nothing in the pager buffer then make sure the index
1006  * is empty and move on.
1007  */
1008  if (cf->pager_vector == 0)
1009  {
1011  return;
1012  }
1013 
1014  /* Retain a pointer to the current page start line so we can
1015  * find it later
1016  */
1017  pi = &cf->pager_index[cf->pager_start];
1018  old_line = pi->line;
1019  old_offset = pi->offset;
1020 
1021  /* Re-add the buffered lines to the index */
1024  {
1025  unix_cli_pager_add_line (cf, NULL, i);
1026  }
1027 
1028  /* Attempt to re-locate the previously stored page start line */
1030  {
1031  pi = &cf->pager_index[i];
1032 
1033  if (pi->line == old_line &&
1034  (pi->offset <= old_offset || pi->offset + pi->length > old_offset))
1035  {
1036  /* Found it! */
1037  cf->pager_start = i;
1038  break;
1039  }
1040  }
1041 
1042  /* In case the start line was not found (rare), ensure the pager start
1043  * index is within bounds
1044  */
1045  if (cf->pager_start >= vec_len (cf->pager_index))
1046  {
1047  if (!cf->height || vec_len (cf->pager_index) < (cf->height - 1))
1048  cf->pager_start = 0;
1049  else
1050  cf->pager_start = vec_len (cf->pager_index) - (cf->height - 1);
1051  }
1052 }
1053 
1054 /** VLIB CLI output function.
1055  *
1056  * If the terminal has a pager configured then this function takes care
1057  * of collating output into the pager buffer; ensuring only the first page
1058  * is displayed and any lines in excess of the first page are buffered.
1059  *
1060  * If the maximum number of index lines in the buffer is exceeded then the
1061  * pager is cancelled and the contents of the current buffer are sent to the
1062  * terminal.
1063  *
1064  * If there is no pager configured then the output is sent directly to the
1065  * terminal.
1066  *
1067  * @param cli_file_index Index of the CLI session where this output is
1068  * directed.
1069  * @param buffer String of printabe bytes to be output.
1070  * @param buffer_bytes The number of bytes in @c buffer to be output.
1071  */
1072 static void
1073 unix_vlib_cli_output (uword cli_file_index, u8 * buffer, uword buffer_bytes)
1074 {
1075  unix_main_t *um = &unix_main;
1078  unix_cli_file_t *cf;
1079  clib_file_t *uf;
1080 
1081  cf = pool_elt_at_index (cm->cli_file_pool, cli_file_index);
1083 
1084  if (cf->no_pager || um->cli_pager_buffer_limit == 0 || cf->height == 0)
1085  {
1086  unix_vlib_cli_output_cooked (cf, uf, buffer, buffer_bytes);
1087  }
1088  else
1089  {
1090  word row = vec_len (cf->pager_index);
1091  u8 *line;
1093 
1094  /* Index and add the output lines to the pager buffer. */
1095  unix_cli_pager_add_line (cf, buffer, buffer_bytes);
1096 
1097  /* Now iterate what was added to display the lines.
1098  * If we reach the bottom of the page, display a prompt.
1099  */
1100  while (row < vec_len (cf->pager_index))
1101  {
1102  if (row < cf->height - 1)
1103  {
1104  /* output this line */
1105  pi = &cf->pager_index[row];
1106  line = cf->pager_vector[pi->line] + pi->offset;
1107  unix_vlib_cli_output_cooked (cf, uf, line, pi->length);
1108 
1109  /* if the last line didn't end in newline, and we're at the
1110  * bottom of the page, add a newline */
1111  if (line[pi->length - 1] != '\n' && row == cf->height - 2)
1112  unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1);
1113  }
1114  else
1115  {
1116  /* Display the pager prompt every 10 lines */
1117  if (!(row % 10))
1118  unix_cli_pager_prompt (cf, uf);
1119  }
1120  row++;
1121  }
1122 
1123  /* Check if we went over the pager buffer limit */
1124  if (vec_len (cf->pager_index) > um->cli_pager_buffer_limit)
1125  {
1126  /* Stop using the pager for the remainder of this CLI command */
1127  cf->no_pager = 2;
1128 
1129  /* If we likely printed the prompt, erase it */
1130  if (vec_len (cf->pager_index) > cf->height - 1)
1131  unix_cli_pager_prompt_erase (cf, uf);
1132 
1133  /* Dump out the contents of the buffer */
1134  for (row = cf->pager_start + (cf->height - 1);
1135  row < vec_len (cf->pager_index); row++)
1136  {
1137  pi = &cf->pager_index[row];
1138  line = cf->pager_vector[pi->line] + pi->offset;
1139  unix_vlib_cli_output_cooked (cf, uf, line, pi->length);
1140  }
1141 
1142  unix_cli_pager_reset (cf);
1143  }
1144  }
1145 }
1146 
1147 /** Identify whether a terminal type is ANSI capable.
1148  *
1149  * Compares the string given in @c term with a list of terminal types known
1150  * to support ANSI escape sequences.
1151  *
1152  * This list contains, for example, @c xterm, @c screen and @c ansi.
1153  *
1154  * @param term A string with a terminal type in it.
1155  * @param len The length of the string in @c term.
1156  *
1157  * @return @c 1 if the terminal type is recognized as supporting ANSI
1158  * terminal sequences; @c 0 otherwise.
1159  */
1160 static u8
1162 {
1163  /* This may later be better done as a hash of some sort. */
1164 #define _(a) do { \
1165  if (strncasecmp(a, (char *)term, (size_t)len) == 0) return 1; \
1166  } while(0)
1167 
1168  _("xterm");
1169  _("xterm-color");
1170  _("xterm-256color"); /* iTerm on Mac */
1171  _("screen");
1172  _("screen-256color"); /* Screen and tmux */
1173  _("ansi"); /* Microsoft Telnet */
1174 #undef _
1175 
1176  return 0;
1177 }
1178 
1179 /** Identify whether a terminal type is non-interactive.
1180  *
1181  * Compares the string given in @c term with a list of terminal types known
1182  * to be non-interactive, as send by tools such as @c vppctl .
1183  *
1184  * This list contains, for example, @c vppctl.
1185  *
1186  * @param term A string with a terminal type in it.
1187  * @param len The length of the string in @c term.
1188  *
1189  * @return @c 1 if the terminal type is recognized as being non-interactive;
1190  * @c 0 otherwise.
1191  */
1192 static u8
1194 {
1195  /* This may later be better done as a hash of some sort. */
1196 #define _(a) do { \
1197  if (strncasecmp(a, (char *)term, (size_t)len) == 0) return 1; \
1198  } while(0)
1199 
1200  _("vppctl");
1201 #undef _
1202 
1203  return 0;
1204 }
1205 
1206 /** Set a session to be non-interactive. */
1207 static void
1209 {
1210  /* Non-interactive sessions don't get these */
1211  cf->is_interactive = 0;
1212  cf->no_pager = 1;
1213  cf->history_limit = 0;
1214  cf->has_history = 0;
1215  cf->line_mode = 1;
1216 }
1217 
1218 /** @brief Emit initial welcome banner and prompt on a connection. */
1219 static void
1221 {
1222  unix_main_t *um = &unix_main;
1225  unix_cli_banner_t *banner;
1226  int i, len;
1227 
1228  /* Mark the session as started if we get here */
1229  cf->started = 1;
1230 
1231  if (!(cf->is_interactive)) /* No banner for non-interactive sessions */
1232  return;
1233 
1234  /*
1235  * Put the first bytes directly into the buffer so that further output is
1236  * queued until everything is ready. (oterwise initial prompt can appear
1237  * mid way through VPP initialization)
1238  */
1239  unix_cli_add_pending_output (uf, cf, (u8 *) "\r", 1);
1240 
1241  if (!um->cli_no_banner)
1242  {
1243  if (cf->ansi_capable)
1244  {
1245  banner = unix_cli_banner_color;
1246  len = ARRAY_LEN (unix_cli_banner_color);
1247  }
1248  else
1249  {
1250  banner = unix_cli_banner;
1251  len = ARRAY_LEN (unix_cli_banner);
1252  }
1253 
1254  for (i = 0; i < len; i++)
1255  {
1257  banner[i].line, banner[i].length);
1258  }
1259  }
1260 
1261  /* Prompt. */
1262  unix_cli_cli_prompt (cf, uf);
1263 
1264 }
1265 
1266 /**
1267  * @brief A failsafe manager that ensures CLI sessions issue an initial
1268  * prompt if TELNET negotiation fails.
1269  */
1270 static uword
1272  vlib_frame_t * f)
1273 {
1275  uword event_type, *event_data = 0;
1276  f64 wait = 10.0;
1277 
1278  while (1)
1279  {
1280  if (vec_len (cm->new_sessions) > 0)
1281  wait = vlib_process_wait_for_event_or_clock (vm, wait);
1282  else
1284 
1285  event_type = vlib_process_get_events (vm, &event_data);
1286 
1287  switch (event_type)
1288  {
1289  case ~0: /* no events => timeout */
1290  break;
1291 
1293  {
1294  /* Add an identifier to the new session list */
1296 
1297  ns.cf_index = event_data[0];
1298  ns.deadline = vlib_time_now (vm) + 1.0;
1299 
1300  vec_add1 (cm->new_sessions, ns);
1301 
1302  if (wait > 0.1)
1303  wait = 0.1; /* force a re-evaluation soon, but not too soon */
1304  }
1305  break;
1306 
1307  default:
1308  clib_warning ("BUG: unknown event type 0x%wx", event_type);
1309  break;
1310  }
1311 
1312  vec_reset_length (event_data);
1313 
1315  {
1316  /* Scan the list looking for expired deadlines.
1317  * Emit needed prompts and remove from the list.
1318  * While scanning, look for the nearest new deadline
1319  * for the next iteration.
1320  * Since the list is ordered with newest sessions first
1321  * we can make assumptions about expired sessions being
1322  * contiguous at the beginning and the next deadline is the
1323  * next entry on the list, if any.
1324  */
1325  f64 now = vlib_time_now (vm);
1327  word index = 0;
1328 
1329  wait = INFINITY;
1330 
1331  vec_foreach (nsp, cm->new_sessions)
1332  {
1334  {
1335  /* Deadline reached */
1336  unix_cli_file_t *cf;
1337 
1338  /* Mark the highwater */
1339  index++;
1340 
1341  /* Check the connection didn't close already */
1342  if (pool_is_free_index (cm->cli_file_pool, nsp->cf_index))
1343  continue;
1344 
1345  cf = pool_elt_at_index (cm->cli_file_pool, nsp->cf_index);
1346 
1347  if (!cf->started)
1348  unix_cli_file_welcome (cm, cf);
1349  }
1350  else
1351  {
1352  wait = nsp->deadline - now;
1353  break;
1354  }
1355  }
1356 
1357  if (index)
1358  {
1359  /* We have sessions to remove */
1360  vec_delete (cm->new_sessions, index, 0);
1361  }
1362  }
1363  }
1364 
1365  return 0;
1366 }
1367 
1368 
1369 /** @brief A mostly no-op Telnet state machine.
1370  * Process Telnet command bytes in a way that ensures we're mostly
1371  * transparent to the Telnet protocol. That is, it's mostly a no-op.
1372  *
1373  * @return -1 if we need more bytes, otherwise a positive integer number of
1374  * bytes to consume from the input_vector, not including the initial
1375  * IAC byte.
1376  */
1377 static i32
1379  unix_cli_file_t * cf,
1380  clib_file_t * uf, u8 * input_vector, uword len)
1381 {
1382  /* Input_vector starts at IAC byte.
1383  * See if we have a complete message; if not, return -1 so we wait for more.
1384  * if we have a complete message, consume those bytes from the vector.
1385  */
1386  i32 consume = 0;
1387 
1388  if (len == 1)
1389  return -1; /* want more bytes */
1390 
1391  switch (input_vector[1])
1392  {
1393  case IAC:
1394  /* two IAC's in a row means to pass through 0xff.
1395  * since that makes no sense here, just consume it.
1396  */
1397  consume = 1;
1398  break;
1399 
1400  case WILL:
1401  case WONT:
1402  case DO:
1403  case DONT:
1404  /* Expect 3 bytes */
1405  if (len < 3)
1406  return -1; /* want more bytes */
1407 
1408  consume = 2;
1409  break;
1410 
1411  case SB:
1412  {
1413  /* Sub option - search ahead for IAC SE to end it */
1414  i32 i;
1415  for (i = 3; i < len && i < UNIX_CLI_MAX_DEPTH_TELNET; i++)
1416  {
1417  if (input_vector[i - 1] == IAC && input_vector[i] == SE)
1418  {
1419  /* We have a complete message; see if we care about it */
1420  switch (input_vector[2])
1421  {
1422  case TELOPT_TTYPE:
1423  if (input_vector[3] != 0)
1424  break;
1425  {
1426  /* See if the the terminal type is recognized */
1427  u8 *term = input_vector + 4;
1428  uword len = i - 5;
1429 
1430  /* See if the terminal type is ANSI capable */
1431  cf->ansi_capable =
1432  unix_cli_terminal_type_ansi (term, len);
1433 
1434  /* See if the terminal type indicates non-interactive */
1435  if (unix_cli_terminal_type_noninteractive (term, len))
1437  }
1438 
1439  /* If session not started, we can release the pause */
1440  if (!cf->started)
1441  /* Send the welcome banner and initial prompt */
1442  unix_cli_file_welcome (&unix_cli_main, cf);
1443  break;
1444 
1445  case TELOPT_NAWS:
1446  /* Window size */
1447  if (i != 8) /* check message is correct size */
1448  break;
1449 
1450  cf->width =
1451  clib_net_to_host_u16 (*((u16 *) (input_vector + 3)));
1454  if (cf->width == 0)
1456 
1457  cf->height =
1458  clib_net_to_host_u16 (*((u16 *) (input_vector + 5)));
1461  if (cf->height == 0)
1463 
1464  /* reindex pager buffer */
1466  /* redraw page */
1467  unix_cli_pager_redraw (cf, uf);
1468  break;
1469 
1470  default:
1471  break;
1472  }
1473  /* Consume it all */
1474  consume = i;
1475  break;
1476  }
1477  }
1478 
1479  if (i == UNIX_CLI_MAX_DEPTH_TELNET)
1480  consume = 1; /* hit max search depth, advance one byte */
1481 
1482  if (consume == 0)
1483  return -1; /* want more bytes */
1484 
1485  break;
1486  }
1487 
1488  case GA:
1489  case EL:
1490  case EC:
1491  case AO:
1492  case IP:
1493  case BREAK:
1494  case DM:
1495  case NOP:
1496  case SE:
1497  case EOR:
1498  case ABORT:
1499  case SUSP:
1500  case xEOF:
1501  /* Simple one-byte messages */
1502  consume = 1;
1503  break;
1504 
1505  case AYT:
1506  /* Are You There - trigger a visible response */
1507  consume = 1;
1508  unix_vlib_cli_output_cooked (cf, uf, (u8 *) "fd.io VPP\n", 10);
1509  break;
1510 
1511  default:
1512  /* Unknown command! Eat the IAC byte */
1513  break;
1514  }
1515 
1516  return consume;
1517 }
1518 
1519 /** @brief Process actionable input.
1520  * Based on the \c action process the input; this typically involves
1521  * searching the command history or editing the current command line.
1522  */
1523 static int
1525  unix_main_t * um,
1526  unix_cli_file_t * cf,
1527  clib_file_t * uf,
1528  u8 input, unix_cli_parse_action_t action)
1529 {
1530  u8 *prev;
1531  u8 *save = 0;
1532  u8 **possible_commands;
1533  int j, delta;
1534 
1535  switch (action)
1536  {
1538  break;
1539 
1542  if (!cf->has_history || !cf->history_limit)
1543  break;
1544  if (cf->search_mode == 0)
1545  {
1546  /* Erase the current command (if any) */
1547  for (; cf->cursor > 0; cf->cursor--)
1548  {
1550  unix_vlib_cli_output_cooked (cf, uf, (u8 *) " ", 1);
1552  }
1553 
1556 
1557  if (action == UNIX_CLI_PARSE_ACTION_REVSEARCH)
1558  cf->search_mode = -1;
1559  else
1560  cf->search_mode = 1;
1561  }
1562  else
1563  {
1564  if (action == UNIX_CLI_PARSE_ACTION_REVSEARCH)
1565  cf->search_mode = -1;
1566  else
1567  cf->search_mode = 1;
1568 
1569  cf->excursion += cf->search_mode;
1570  goto search_again;
1571  }
1572  break;
1573 
1575  /* Erase the command from the cursor to the start */
1576 
1577  j = cf->cursor;
1578  /* Shimmy backwards to the new end of line position */
1579  delta = vec_len (cf->current_command) - cf->cursor;
1580  for (; cf->cursor > delta; cf->cursor--)
1582  /* Zap from here to the end of what is currently displayed */
1583  for (; cf->cursor < vec_len (cf->current_command); cf->cursor++)
1584  unix_vlib_cli_output_cooked (cf, uf, (u8 *) " ", 1);
1585  /* Get back to the start of the line */
1586  for (; cf->cursor > 0; cf->cursor--)
1588 
1589  /* Delete the desired text from the command */
1590  memmove (cf->current_command, cf->current_command + j, delta);
1591  _vec_len (cf->current_command) = delta;
1592 
1593  /* Print the new contents */
1594  unix_vlib_cli_output_cooked (cf, uf, cf->current_command, delta);
1595  cf->cursor = delta; /* for backspace tracking */
1596 
1597  /* Shimmy back to the start */
1598  for (; cf->cursor > 0; cf->cursor--)
1600 
1601  cf->search_mode = 0;
1602  break;
1603 
1605  /* Erase the command from the cursor to the end */
1606 
1607  j = cf->cursor;
1608  /* Zap from cursor to end of what is currently displayed */
1609  for (; cf->cursor < (vec_len (cf->current_command)); cf->cursor++)
1610  unix_vlib_cli_output_cooked (cf, uf, (u8 *) " ", 1);
1611  /* Get back to where we were */
1612  for (; cf->cursor > j; cf->cursor--)
1614 
1615  /* Truncate the line at the cursor */
1616  _vec_len (cf->current_command) = cf->cursor;
1617 
1618  cf->search_mode = 0;
1619  break;
1620 
1622  /* calculate num of caracter to be erased */
1623  delta = 0;
1624  while (cf->cursor > delta
1625  && cf->current_command[cf->cursor - delta - 1] == ' ')
1626  delta++;
1627  while (cf->cursor > delta
1628  && cf->current_command[cf->cursor - delta - 1] != ' ')
1629  delta++;
1630 
1631  if (vec_len (cf->current_command))
1632  {
1633  if (cf->cursor > 0)
1634  {
1635  /* move cursor left delta times */
1636  for (j = delta; j > 0; j--, cf->cursor--)
1638  save = cf->current_command + cf->cursor;
1639 
1640  /* redraw remainder of line */
1641  memmove (cf->current_command + cf->cursor,
1642  cf->current_command + cf->cursor + delta,
1643  _vec_len (cf->current_command) - cf->cursor - delta);
1645  cf->current_command + cf->cursor,
1646  _vec_len (cf->current_command) -
1647  cf->cursor);
1648  cf->cursor += _vec_len (cf->current_command) - cf->cursor;
1649 
1650  /* print delta amount of blank spaces,
1651  * then finally fix the cursor position */
1652  for (j = delta; j > 0; j--, cf->cursor--)
1654  for (j = delta; j > 0; j--, cf->cursor++)
1655  unix_vlib_cli_output_cooked (cf, uf, (u8 *) " ", 1);
1656  for (; (cf->current_command + cf->cursor) > save; cf->cursor--)
1658  _vec_len (cf->current_command) -= delta;
1659  }
1660  }
1661  cf->search_mode = 0;
1662  cf->excursion = 0;
1664  break;
1665 
1667  if (cf->cursor > 0)
1668  {
1670  cf->cursor--;
1671  }
1672 
1673  cf->search_mode = 0;
1674  break;
1675 
1677  if (cf->cursor < vec_len (cf->current_command))
1678  {
1679  /* have to emit the character under the cursor */
1681  cf->current_command + cf->cursor, 1);
1682  cf->cursor++;
1683  }
1684 
1685  cf->search_mode = 0;
1686  break;
1687 
1690  if (!cf->has_history || !cf->history_limit)
1691  break;
1692  cf->search_mode = 0;
1693  /* Erase the command */
1694  for (; cf->cursor < vec_len (cf->current_command); cf->cursor++)
1695  unix_vlib_cli_output_cooked (cf, uf, (u8 *) " ", 1);
1696  for (; cf->cursor > 0; cf->cursor--)
1697  {
1699  unix_vlib_cli_output_cooked (cf, uf, (u8 *) " ", 1);
1701  }
1703  if (vec_len (cf->command_history))
1704  {
1705  if (action == UNIX_CLI_PARSE_ACTION_UP)
1706  delta = -1;
1707  else
1708  delta = 1;
1709 
1710  cf->excursion += delta;
1711 
1712  if (cf->excursion == vec_len (cf->command_history))
1713  {
1714  /* down-arrowed to last entry - want a blank line */
1715  _vec_len (cf->current_command) = 0;
1716  }
1717  else if (cf->excursion < 0)
1718  {
1719  /* up-arrowed over the start to the end, want a blank line */
1720  cf->excursion = vec_len (cf->command_history);
1721  _vec_len (cf->current_command) = 0;
1722  }
1723  else
1724  {
1725  if (cf->excursion > (i32) vec_len (cf->command_history) - 1)
1726  /* down-arrowed past end - wrap to start */
1727  cf->excursion = 0;
1728 
1729  /* Print the command at the current position */
1730  prev = cf->command_history[cf->excursion];
1731  vec_validate (cf->current_command, vec_len (prev) - 1);
1732 
1733  clib_memcpy (cf->current_command, prev, vec_len (prev));
1734  _vec_len (cf->current_command) = vec_len (prev);
1736  vec_len (cf->current_command));
1737  }
1738  }
1739  cf->cursor = vec_len (cf->current_command);
1740  break;
1741 
1743  if (vec_len (cf->current_command) && cf->cursor > 0)
1744  {
1745  for (; cf->cursor > 0; cf->cursor--)
1747  }
1748 
1749  cf->search_mode = 0;
1750  break;
1751 
1753  if (vec_len (cf->current_command) &&
1754  cf->cursor < vec_len (cf->current_command))
1755  {
1757  cf->current_command + cf->cursor,
1758  vec_len (cf->current_command) -
1759  cf->cursor);
1760  cf->cursor = vec_len (cf->current_command);
1761  }
1762 
1763  cf->search_mode = 0;
1764  break;
1765 
1767  if (vec_len (cf->current_command) && cf->cursor > 0)
1768  {
1770  cf->cursor--;
1771 
1772  while (cf->cursor && isspace (cf->current_command[cf->cursor]))
1773  {
1775  cf->cursor--;
1776  }
1777  while (cf->cursor && !isspace (cf->current_command[cf->cursor]))
1778  {
1779  if (isspace (cf->current_command[cf->cursor - 1]))
1780  break;
1782  cf->cursor--;
1783  }
1784 
1785  }
1786 
1787  cf->search_mode = 0;
1788  break;
1789 
1791  if (vec_len (cf->current_command) &&
1792  cf->cursor < vec_len (cf->current_command))
1793  {
1794  int e = vec_len (cf->current_command);
1795  j = cf->cursor;
1796  while (j < e && !isspace (cf->current_command[j]))
1797  j++;
1798  while (j < e && isspace (cf->current_command[j]))
1799  j++;
1801  cf->current_command + cf->cursor,
1802  j - cf->cursor);
1803  cf->cursor = j;
1804  }
1805 
1806  cf->search_mode = 0;
1807  break;
1808 
1809 
1811  if (vec_len (cf->current_command))
1812  {
1813  if (cf->cursor == vec_len (cf->current_command))
1814  {
1816  cf->cursor--;
1817  unix_vlib_cli_output_cooked (cf, uf, (u8 *) " ", 1);
1818  cf->cursor++;
1820  cf->cursor--;
1821  _vec_len (cf->current_command)--;
1822  }
1823  else if (cf->cursor > 0)
1824  {
1825  /* shift everything at & to the right of the cursor left by 1 */
1826  j = vec_len (cf->current_command) - cf->cursor;
1827  memmove (cf->current_command + cf->cursor - 1,
1828  cf->current_command + cf->cursor, j);
1829  _vec_len (cf->current_command)--;
1830 
1831  /* redraw the rest of the line */
1833  cf->cursor--;
1835  cf->current_command + cf->cursor,
1836  j);
1837  cf->cursor += j;
1838  /* erase last char */
1839  unix_vlib_cli_output_cooked (cf, uf, (u8 *) " ", 1);
1840  cf->cursor++;
1841 
1842  /* and shift the terminal cursor back where it should be */
1843  j += 2; /* account for old string length and offset position */
1844  while (--j)
1845  {
1847  cf->cursor--;
1848  }
1849  }
1850  }
1851  cf->search_mode = 0;
1852  cf->excursion = 0;
1854  break;
1855 
1857  if (vec_len (cf->current_command))
1858  {
1859  if (cf->cursor < vec_len (cf->current_command))
1860  {
1861  /* shift everything to the right of the cursor left by 1 */
1862  j = vec_len (cf->current_command) - cf->cursor - 1;
1863  memmove (cf->current_command + cf->cursor,
1864  cf->current_command + cf->cursor + 1, j);
1865  _vec_len (cf->current_command)--;
1866  /* redraw the rest of the line */
1868  cf->current_command + cf->cursor,
1869  j);
1870  cf->cursor += j;
1871  unix_vlib_cli_output_cooked (cf, uf, (u8 *) " ", 1);
1872  cf->cursor++;
1874  cf->cursor--;
1875  /* and shift the terminal cursor back where it should be */
1876  if (j)
1877  {
1879  cf->cursor--;
1880  while (--j)
1881  {
1883  cf->cursor--;
1884  }
1885  }
1886  }
1887  }
1888  else if (input == 'D' - '@')
1889  {
1890  /* ^D with no command entered = quit */
1891  unix_vlib_cli_output_cooked (cf, uf, (u8 *) "quit\n", 5);
1895  cf - cm->cli_file_pool);
1896  }
1897  cf->search_mode = 0;
1898  cf->excursion = 0;
1900  break;
1901 
1903  /* If we're in ANSI mode, clear the screen.
1904  * Then redraw the prompt and any existing command input, then put
1905  * the cursor back where it was in that line.
1906  */
1907  if (cf->ansi_capable)
1909  (u8 *) ANSI_CLEAR,
1910  sizeof (ANSI_CLEAR) - 1);
1911  else
1912  unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1);
1913 
1914  unix_vlib_cli_output_raw (cf, uf,
1915  cm->cli_prompt, vec_len (cm->cli_prompt));
1917  cf->current_command,
1918  vec_len (cf->current_command));
1919  j = cf->cursor;
1920  cf->cursor = vec_len (cf->current_command);
1921  for (; cf->cursor > j; cf->cursor--)
1923 
1924  break;
1925 
1927  if (cf->cursor < vec_len (cf->current_command))
1928  {
1929  /* if we are in the middle of a line, complete only if
1930  * the cursor points to whitespace */
1931  if (isspace (cf->current_command[cf->cursor]))
1932  {
1933  /* save and clear any input that is after the cursor */
1934  vec_resize (save, vec_len (cf->current_command) - cf->cursor);
1935  clib_memcpy (save, cf->current_command + cf->cursor,
1936  vec_len (cf->current_command) - cf->cursor);
1937  _vec_len (cf->current_command) = cf->cursor;
1938  }
1939  else
1940  {
1941  unix_vlib_cli_output_raw (cf, uf, (u8 *) "\a", 1);
1942  break;
1943  }
1944  }
1945  possible_commands =
1947  if (vec_len (possible_commands) == 1)
1948  {
1949  u8 *completed = possible_commands[0];
1950  j = cf->cursor;
1951 
1952  /* find the last word of current_command */
1953  while (j >= 1 && !isspace (cf->current_command[j - 1]))
1954  {
1956  cf->cursor--;
1957  j--;
1958  }
1959  _vec_len (cf->current_command) = j;
1960 
1961  /* replace it with the newly expanded command */
1962  vec_append (cf->current_command, completed);
1963 
1964  /* echo to the terminal */
1965  unix_vlib_cli_output_cooked (cf, uf, completed,
1966  vec_len (completed));
1967 
1968  /* add one trailing space if needed */
1969  if (vec_len (save) == 0)
1970  {
1971  vec_add1 (cf->current_command, ' ');
1972  unix_vlib_cli_output_cooked (cf, uf, (u8 *) " ", 1);
1973  }
1974 
1975  cf->cursor = vec_len (cf->current_command);
1976 
1977  }
1978  else if (vec_len (possible_commands) >= 2)
1979  {
1980  u8 **possible_command;
1981  uword max_command_len = 0, min_command_len = ~0;
1982  u32 i;
1983 
1984  vec_foreach (possible_command, possible_commands)
1985  {
1986  if (vec_len (*possible_command) > max_command_len)
1987  max_command_len = vec_len (*possible_command);
1988  if (vec_len (*possible_command) < min_command_len)
1989  min_command_len = vec_len (*possible_command);
1990  }
1991 
1992  unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1);
1993 
1994  i = 0;
1995  vec_foreach (possible_command, possible_commands)
1996  {
1997  if (i + max_command_len >= cf->width)
1998  {
1999  unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1);
2000  i = 0;
2001  }
2002  unix_vlib_cli_output_cooked (cf, uf, *possible_command,
2003  vec_len (*possible_command));
2004  for (j = vec_len (*possible_command); j < max_command_len + 2;
2005  j++)
2006  {
2007  unix_vlib_cli_output_cooked (cf, uf, (u8 *) " ", 1);
2008  }
2009  i += max_command_len + 2;
2010  }
2011 
2012  unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1);
2013 
2014  /* rewrite prompt */
2015  unix_cli_cli_prompt (cf, uf);
2017  vec_len (cf->current_command));
2018 
2019  /* count length of last word */
2020  j = cf->cursor;
2021  i = 0;
2022  while (j >= 1 && !isspace (cf->current_command[j - 1]))
2023  {
2024  j--;
2025  i++;
2026  }
2027 
2028  /* determine smallest common command */
2029  for (; i < min_command_len; i++)
2030  {
2031  u8 common = '\0';
2032  int stop = 0;
2033 
2034  vec_foreach (possible_command, possible_commands)
2035  {
2036  if (common == '\0')
2037  {
2038  common = (*possible_command)[i];
2039  }
2040  else if (common != (*possible_command)[i])
2041  {
2042  stop = 1;
2043  break;
2044  }
2045  }
2046 
2047  if (!stop)
2048  {
2049  vec_add1 (cf->current_command, common);
2050  cf->cursor++;
2051  unix_vlib_cli_output_cooked (cf, uf, (u8 *) & common, 1);
2052  }
2053  else
2054  {
2055  break;
2056  }
2057  }
2058  }
2059  else
2060  {
2061  unix_vlib_cli_output_raw (cf, uf, (u8 *) "\a", 1);
2062  }
2063 
2064  if (vec_len (save) > 0)
2065  {
2066  /* restore remaining input if tab was hit in the middle of a line */
2067  unix_vlib_cli_output_cooked (cf, uf, save, vec_len (save));
2068  cf->cursor += vec_len (save);
2069  for (j = 0; j < vec_len (save); j++, cf->cursor--)
2071  vec_append (cf->current_command, save);
2072  vec_free (save);
2073  }
2074  vec_free (possible_commands);
2075 
2076  break;
2078  /* TODO */
2079  break;
2080 
2081 
2083  pager_quit:
2084  unix_cli_pager_prompt_erase (cf, uf);
2085  unix_cli_pager_reset (cf);
2086  unix_cli_cli_prompt (cf, uf);
2087  break;
2088 
2091  /* show next page of the buffer */
2092  if (cf->height + cf->pager_start <= vec_len (cf->pager_index))
2093  {
2094  u8 *line = NULL;
2095  unix_cli_pager_index_t *pi = NULL;
2096 
2097  int m = cf->pager_start + (cf->height - 1);
2098  unix_cli_pager_prompt_erase (cf, uf);
2099  for (j = m;
2100  j < vec_len (cf->pager_index) && cf->pager_start < m;
2101  j++, cf->pager_start++)
2102  {
2103  pi = &cf->pager_index[j];
2104  line = cf->pager_vector[pi->line] + pi->offset;
2105  unix_vlib_cli_output_cooked (cf, uf, line, pi->length);
2106  }
2107  /* if the last line didn't end in newline, add a newline */
2108  if (pi && line[pi->length - 1] != '\n')
2109  unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1);
2110  unix_cli_pager_prompt (cf, uf);
2111  }
2112  else
2113  {
2114  if (action == UNIX_CLI_PARSE_ACTION_PAGER_NEXT)
2115  /* no more in buffer, exit, but only if it was <space> */
2116  goto pager_quit;
2117  }
2118  break;
2119 
2122  /* display the next line of the buffer */
2123  if (cf->height + cf->pager_start <= vec_len (cf->pager_index))
2124  {
2125  u8 *line;
2127 
2128  unix_cli_pager_prompt_erase (cf, uf);
2129  pi = &cf->pager_index[cf->pager_start + (cf->height - 1)];
2130  line = cf->pager_vector[pi->line] + pi->offset;
2131  unix_vlib_cli_output_cooked (cf, uf, line, pi->length);
2132  cf->pager_start++;
2133  /* if the last line didn't end in newline, add a newline */
2134  if (line[pi->length - 1] != '\n')
2135  unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1);
2136  unix_cli_pager_prompt (cf, uf);
2137  }
2138  else
2139  {
2140  if (action == UNIX_CLI_PARSE_ACTION_PAGER_CRLF)
2141  /* no more in buffer, exit, but only if it was <enter> */
2142  goto pager_quit;
2143  }
2144 
2145  break;
2146 
2148  /* scroll the page back one line */
2149  if (cf->pager_start > 0)
2150  {
2151  u8 *line = NULL;
2152  unix_cli_pager_index_t *pi = NULL;
2153 
2154  cf->pager_start--;
2155  if (cf->ansi_capable)
2156  {
2157  pi = &cf->pager_index[cf->pager_start];
2158  line = cf->pager_vector[pi->line] + pi->offset;
2159  unix_cli_pager_prompt_erase (cf, uf);
2161  sizeof (ANSI_SCROLLDN) - 1);
2163  sizeof (ANSI_SAVECURSOR) - 1);
2164  unix_cli_ansi_cursor (cf, uf, 1, 1);
2166  sizeof (ANSI_CLEARLINE) - 1);
2167  unix_vlib_cli_output_cooked (cf, uf, line, pi->length);
2169  sizeof (ANSI_RESTCURSOR) - 1);
2170  unix_cli_pager_prompt_erase (cf, uf);
2171  unix_cli_pager_prompt (cf, uf);
2172  }
2173  else
2174  {
2175  int m = cf->pager_start + (cf->height - 1);
2176  unix_cli_pager_prompt_erase (cf, uf);
2177  for (j = cf->pager_start;
2178  j < vec_len (cf->pager_index) && j < m; j++)
2179  {
2180  pi = &cf->pager_index[j];
2181  line = cf->pager_vector[pi->line] + pi->offset;
2182  unix_vlib_cli_output_cooked (cf, uf, line, pi->length);
2183  }
2184  /* if the last line didn't end in newline, add a newline */
2185  if (pi && line[pi->length - 1] != '\n')
2186  unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1);
2187  unix_cli_pager_prompt (cf, uf);
2188  }
2189  }
2190  break;
2191 
2193  /* back to the first page of the buffer */
2194  if (cf->pager_start > 0)
2195  {
2196  u8 *line = NULL;
2197  unix_cli_pager_index_t *pi = NULL;
2198 
2199  cf->pager_start = 0;
2200  int m = cf->pager_start + (cf->height - 1);
2201  unix_cli_pager_prompt_erase (cf, uf);
2202  for (j = cf->pager_start; j < vec_len (cf->pager_index) && j < m;
2203  j++)
2204  {
2205  pi = &cf->pager_index[j];
2206  line = cf->pager_vector[pi->line] + pi->offset;
2207  unix_vlib_cli_output_cooked (cf, uf, line, pi->length);
2208  }
2209  /* if the last line didn't end in newline, add a newline */
2210  if (pi && line[pi->length - 1] != '\n')
2211  unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1);
2212  unix_cli_pager_prompt (cf, uf);
2213  }
2214  break;
2215 
2217  /* skip to the last page of the buffer */
2218  if (cf->pager_start < vec_len (cf->pager_index) - (cf->height - 1))
2219  {
2220  u8 *line = NULL;
2221  unix_cli_pager_index_t *pi = NULL;
2222 
2223  cf->pager_start = vec_len (cf->pager_index) - (cf->height - 1);
2224  unix_cli_pager_prompt_erase (cf, uf);
2225  unix_cli_pager_message (cf, uf, "skipping", "\n");
2226  for (j = cf->pager_start; j < vec_len (cf->pager_index); j++)
2227  {
2228  pi = &cf->pager_index[j];
2229  line = cf->pager_vector[pi->line] + pi->offset;
2230  unix_vlib_cli_output_cooked (cf, uf, line, pi->length);
2231  }
2232  /* if the last line didn't end in newline, add a newline */
2233  if (pi && line[pi->length - 1] != '\n')
2234  unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1);
2235  unix_cli_pager_prompt (cf, uf);
2236  }
2237  break;
2238 
2240  /* wander back one page in the buffer */
2241  if (cf->pager_start > 0)
2242  {
2243  u8 *line = NULL;
2244  unix_cli_pager_index_t *pi = NULL;
2245  int m;
2246 
2247  if (cf->pager_start >= cf->height)
2248  cf->pager_start -= cf->height - 1;
2249  else
2250  cf->pager_start = 0;
2251  m = cf->pager_start + cf->height - 1;
2252  unix_cli_pager_prompt_erase (cf, uf);
2253  for (j = cf->pager_start; j < vec_len (cf->pager_index) && j < m;
2254  j++)
2255  {
2256  pi = &cf->pager_index[j];
2257  line = cf->pager_vector[pi->line] + pi->offset;
2258  unix_vlib_cli_output_cooked (cf, uf, line, pi->length);
2259  }
2260  /* if the last line didn't end in newline, add a newline */
2261  if (pi && line[pi->length - 1] != '\n')
2262  unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1);
2263  unix_cli_pager_prompt (cf, uf);
2264  }
2265  break;
2266 
2268  /* Redraw the current pager screen */
2269  unix_cli_pager_redraw (cf, uf);
2270  break;
2271 
2273  /* search forwards in the buffer */
2274  break;
2275 
2276 
2278  crlf:
2279  unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1);
2280 
2281  if (cf->has_history && cf->history_limit)
2282  {
2283  if (cf->command_history
2284  && vec_len (cf->command_history) >= cf->history_limit)
2285  {
2286  vec_free (cf->command_history[0]);
2287  vec_delete (cf->command_history, 1, 0);
2288  }
2289  /* Don't add blank lines to the cmd history */
2290  if (vec_len (cf->current_command))
2291  {
2292  /* Don't duplicate the previous command */
2293  j = vec_len (cf->command_history);
2294  if (j == 0 ||
2295  (vec_len (cf->current_command) !=
2296  vec_len (cf->command_history[j - 1])
2297  || memcmp (cf->current_command, cf->command_history[j - 1],
2298  vec_len (cf->current_command)) != 0))
2299  {
2300  /* copy the command to the history */
2301  u8 *c = 0;
2302  vec_append (c, cf->current_command);
2303  vec_add1 (cf->command_history, c);
2304  cf->command_number++;
2305  }
2306  }
2307  cf->excursion = vec_len (cf->command_history);
2308  }
2309 
2310  cf->search_mode = 0;
2312  cf->cursor = 0;
2313 
2314  return 0;
2315 
2318  if (vec_len (cf->pager_index))
2319  {
2320  /* no-op for now */
2321  }
2322  else if (cf->has_history && cf->search_mode != 0 && isprint (input))
2323  {
2324  int k, limit, offset;
2325  u8 *item;
2326 
2327  vec_add1 (cf->search_key, input);
2328 
2329  search_again:
2330  for (j = 0; j < vec_len (cf->command_history); j++)
2331  {
2332  if (cf->excursion > (i32) vec_len (cf->command_history) - 1)
2333  cf->excursion = 0;
2334  else if (cf->excursion < 0)
2335  cf->excursion = vec_len (cf->command_history) - 1;
2336 
2337  item = cf->command_history[cf->excursion];
2338 
2339  limit = (vec_len (cf->search_key) > vec_len (item)) ?
2340  vec_len (item) : vec_len (cf->search_key);
2341 
2342  for (offset = 0; offset <= vec_len (item) - limit; offset++)
2343  {
2344  for (k = 0; k < limit; k++)
2345  {
2346  if (item[k + offset] != cf->search_key[k])
2347  goto next_offset;
2348  }
2349  goto found_at_offset;
2350 
2351  next_offset:
2352  ;
2353  }
2354  goto next;
2355 
2356  found_at_offset:
2357  for (; cf->cursor > 0; cf->cursor--)
2358  {
2360  unix_vlib_cli_output_cooked (cf, uf, (u8 *) " ", 1);
2362  }
2363 
2364  vec_validate (cf->current_command, vec_len (item) - 1);
2365  clib_memcpy (cf->current_command, item, vec_len (item));
2366  _vec_len (cf->current_command) = vec_len (item);
2367 
2369  vec_len (cf->current_command));
2370  cf->cursor = vec_len (cf->current_command);
2371  goto found;
2372 
2373  next:
2374  cf->excursion += cf->search_mode;
2375  }
2376 
2377  unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\nNo match...", 12);
2380  cf->search_mode = 0;
2381  cf->cursor = 0;
2382  goto crlf;
2383  }
2384  else if (isprint (input)) /* skip any errant control codes */
2385  {
2386  if (cf->cursor == vec_len (cf->current_command))
2387  {
2388  /* Append to end */
2389  vec_add1 (cf->current_command, input);
2390  cf->cursor++;
2391 
2392  /* Echo the character back to the client */
2393  unix_vlib_cli_output_cooked (cf, uf, &input, 1);
2394  }
2395  else
2396  {
2397  /* Insert at cursor: resize +1 byte, move everything over */
2398  j = vec_len (cf->current_command) - cf->cursor;
2399  vec_add1 (cf->current_command, (u8) 'A');
2400  memmove (cf->current_command + cf->cursor + 1,
2401  cf->current_command + cf->cursor, j);
2402  cf->current_command[cf->cursor] = input;
2403  /* Redraw the line */
2404  j++;
2406  cf->current_command + cf->cursor,
2407  j);
2408  cf->cursor += j;
2409  j--;
2410  /* Put terminal cursor back */
2411  for (; j > 0; j--, cf->cursor--)
2413  }
2414  }
2415  else
2416  {
2417  /* no-op - not printable or otherwise not actionable */
2418  }
2419 
2420  found:
2421 
2422  break;
2423 
2425  break;
2426  }
2427  return 1;
2428 }
2429 
2430 /** @brief Process input bytes on a stream to provide line editing and
2431  * command history in the CLI. */
2432 static int
2435 {
2437  int i;
2438 
2439  for (i = 0; i < vec_len (cf->input_vector); i++)
2440  {
2441  unix_cli_parse_action_t action;
2442  i32 matched = 0;
2444 
2445  /* If we're in the pager mode, search the pager actions */
2446  a =
2449 
2450  /* See if the input buffer is some sort of control code */
2451  action = unix_cli_match_action (a, &cf->input_vector[i],
2452  vec_len (cf->input_vector) - i,
2453  &matched);
2454 
2455  switch (action)
2456  {
2458  if (i)
2459  {
2460  /* There was a partial match which means we need more bytes
2461  * than the input buffer currently has.
2462  * Since the bytes before here have been processed, shift
2463  * the remaining contents to the start of the input buffer.
2464  */
2465  vec_delete (cf->input_vector, i, 0);
2466  }
2467  return 1; /* wait for more */
2468 
2470  /* process telnet options */
2471  matched = unix_cli_process_telnet (um, cf, uf,
2472  cf->input_vector + i,
2473  vec_len (cf->input_vector) - i);
2474  if (matched < 0)
2475  {
2476  /* There was a partial match which means we need more bytes
2477  * than the input buffer currently has.
2478  */
2479  if (i)
2480  {
2481  /*
2482  * Since the bytes before here have been processed, shift
2483  * the remaining contents to the start of the input buffer.
2484  */
2485  vec_delete (cf->input_vector, i, 0);
2486  }
2487  return 1; /* wait for more */
2488  }
2489  break;
2490 
2491  default:
2492  /* If telnet option processing switched us to line mode, get us
2493  * out of here!
2494  */
2495  if (cf->line_mode)
2496  {
2497  vec_delete (cf->input_vector, i, 0);
2498  cf->current_command = cf->input_vector;
2499  return 0;
2500  }
2501 
2502  /* process the action */
2503  if (!unix_cli_line_process_one (cm, um, cf, uf,
2504  cf->input_vector[i], action))
2505  {
2506  /* CRLF found. Consume the bytes from the input_vector */
2507  vec_delete (cf->input_vector, i + matched, 0);
2508  /* And tell our caller to execute cf->input_command */
2509  return 0;
2510  }
2511  }
2512 
2513  i += matched;
2514  }
2515 
2517  return 1;
2518 }
2519 
2520 /** @brief Process input to a CLI session. */
2521 static void
2523 {
2524  unix_main_t *um = &unix_main;
2526  clib_file_t *uf;
2527  unix_cli_file_t *cf = pool_elt_at_index (cm->cli_file_pool, cli_file_index);
2528  unformat_input_t input;
2529  int vlib_parse_eval (u8 *);
2530 
2531  cm->current_input_file_index = cli_file_index;
2532 
2533 more:
2534  /* Try vlibplex first. Someday... */
2535  if (0 && vlib_parse_eval (cf->input_vector) == 0)
2536  goto done;
2537 
2538 
2539  if (cf->line_mode)
2540  {
2541  /* just treat whatever we got as a complete line of input */
2542  cf->current_command = cf->input_vector;
2543  }
2544  else
2545  {
2546  /* Line edit, echo, etc. */
2547  if (unix_cli_line_edit (cm, um, fm, cf))
2548  /* want more input */
2549  return;
2550  }
2551 
2552  if (um->log_fd)
2553  {
2554  static u8 *lv;
2555  vec_reset_length (lv);
2556  lv = format (lv, "%U[%d]: %v",
2557  format_timeval, 0 /* current bat-time */ ,
2558  0 /* current bat-format */ ,
2559  cli_file_index, cf->current_command);
2560  int rv __attribute__ ((unused)) = write (um->log_fd, lv, vec_len (lv));
2561  }
2562 
2563  /* Build an unformat structure around our command */
2564  unformat_init_vector (&input, cf->current_command);
2565 
2566  /* Remove leading white space from input. */
2567  (void) unformat (&input, "");
2568 
2569  cf->pager_start = 0; /* start a new pager session */
2570 
2573  cli_file_index);
2574 
2575  /* Zero buffer since otherwise unformat_free will call vec_free on it. */
2576  input.buffer = 0;
2577 
2578  unformat_free (&input);
2579 
2580  /* Re-fetch pointer since pool may have moved. */
2581  cf = pool_elt_at_index (cm->cli_file_pool, cli_file_index);
2583 
2584 done:
2585  /* reset vector; we'll re-use it later */
2586  if (cf->line_mode)
2587  {
2589  cf->current_command = 0;
2590  }
2591  else
2592  {
2594  }
2595 
2596  if (cf->no_pager == 2)
2597  {
2598  /* Pager was programmatically disabled */
2599  unix_cli_pager_message (cf, uf, "pager buffer overflowed", "\n");
2600  cf->no_pager = um->cli_no_pager;
2601  }
2602 
2603  if (vec_len (cf->pager_index) == 0
2604  || vec_len (cf->pager_index) < cf->height)
2605  {
2606  /* There was no need for the pager */
2607  unix_cli_pager_reset (cf);
2608 
2609  /* Prompt. */
2610  unix_cli_cli_prompt (cf, uf);
2611  }
2612  else
2613  {
2614  /* Display the pager prompt */
2615  unix_cli_pager_prompt (cf, uf);
2616  }
2617 
2618  /* Any residual data in the input vector? */
2619  if (vec_len (cf->input_vector))
2620  goto more;
2621 
2622  /* For non-interactive sessions send a NUL byte.
2623  * Specifically this is because vppctl needs to see some traffic in
2624  * order to move on to closing the session. Commands with no output
2625  * would thus cause vppctl to hang indefinitely in non-interactive mode
2626  * since there is also no prompt sent after the command completes.
2627  */
2628  if (!cf->is_interactive)
2629  unix_vlib_cli_output_raw (cf, uf, (u8 *) "\0", 1);
2630 }
2631 
2632 /** Destroy a CLI session.
2633  * @note If we destroy the @c stdin session this additionally signals
2634  * the shutdown of VPP.
2635  */
2636 static void
2638 {
2639  unix_main_t *um = &unix_main;
2641  unix_cli_file_t *cf;
2642  clib_file_t *uf;
2643  int i;
2644 
2645  /* Validate cli_file_index */
2646  if (pool_is_free_index (cm->cli_file_pool, cli_file_index))
2647  return;
2648 
2649  cf = pool_elt_at_index (cm->cli_file_pool, cli_file_index);
2651 
2652  /* Quit/EOF on stdin means quit program. */
2653  if (uf->file_descriptor == STDIN_FILENO)
2655 
2656  vec_free (cf->current_command);
2657  vec_free (cf->search_key);
2658 
2659  for (i = 0; i < vec_len (cf->command_history); i++)
2660  vec_free (cf->command_history[i]);
2661 
2662  vec_free (cf->command_history);
2663 
2664  clib_file_del (fm, uf);
2665 
2666  unix_cli_file_free (cf);
2667  pool_put (cm->cli_file_pool, cf);
2668 }
2669 
2670 /** Handle system events. */
2671 static uword
2674 {
2676  uword i, *data = 0;
2677 
2678  while (1)
2679  {
2680  unix_cli_process_event_type_t event_type;
2682  event_type = vlib_process_get_events (vm, &data);
2683 
2684  switch (event_type)
2685  {
2687  for (i = 0; i < vec_len (data); i++)
2688  unix_cli_process_input (cm, data[i]);
2689  break;
2690 
2692  /* Kill this process. */
2693  for (i = 0; i < vec_len (data); i++)
2694  unix_cli_kill (cm, data[i]);
2695  goto done;
2696  }
2697 
2698  if (data)
2699  _vec_len (data) = 0;
2700  }
2701 
2702 done:
2703  vec_free (data);
2704 
2705  vlib_node_set_state (vm, rt->node_index, VLIB_NODE_STATE_DISABLED);
2706 
2707  /* Add node index so we can re-use this process later. */
2709 
2710  return 0;
2711 }
2712 
2713 /** Called when a CLI session file descriptor can be written to without
2714  * blocking. */
2715 static clib_error_t *
2717 {
2719  unix_cli_file_t *cf;
2720  int n;
2721 
2723 
2724  /* Flush output vector. */
2725  if (cf->is_socket)
2726  /* If it's a socket we use MSG_NOSIGNAL to prevent SIGPIPE */
2727  n = send (uf->file_descriptor,
2728  cf->output_vector, vec_len (cf->output_vector), MSG_NOSIGNAL);
2729  else
2730  n = write (uf->file_descriptor,
2731  cf->output_vector, vec_len (cf->output_vector));
2732 
2733  if (n < 0 && errno != EAGAIN)
2734  {
2735  if (errno == EPIPE)
2736  {
2737  /* connection closed on us */
2738  unix_main_t *um = &unix_main;
2739  cf->has_epipe = 1;
2742  uf->private_data);
2743  }
2744  else
2745  {
2746  return clib_error_return_unix (0, "write");
2747  }
2748  }
2749 
2750  else if (n > 0)
2751  unix_cli_del_pending_output (uf, cf, n);
2752 
2753  return /* no error */ 0;
2754 }
2755 
2756 /** Called when a CLI session file descriptor has data to be read. */
2757 static clib_error_t *
2759 {
2760  unix_main_t *um = &unix_main;
2762  unix_cli_file_t *cf;
2763  uword l;
2764  int n, n_read, n_try;
2765 
2767 
2768  n = n_try = 4096;
2769  while (n == n_try)
2770  {
2771  l = vec_len (cf->input_vector);
2772  vec_resize (cf->input_vector, l + n_try);
2773 
2774  n = read (uf->file_descriptor, cf->input_vector + l, n_try);
2775 
2776  /* Error? */
2777  if (n < 0 && errno != EAGAIN)
2778  return clib_error_return_unix (0, "read");
2779 
2780  n_read = n < 0 ? 0 : n;
2781  _vec_len (cf->input_vector) = l + n_read;
2782  }
2783 
2784  if (!(n < 0))
2786  cf->process_node_index,
2787  (n_read == 0
2790  /* event data */ uf->private_data);
2791 
2792  return /* no error */ 0;
2793 }
2794 
2795 /** Called when a CLI session file descriptor has an error condition. */
2796 static clib_error_t *
2798 {
2799  unix_main_t *um = &unix_main;
2801  unix_cli_file_t *cf;
2802 
2804  cf->has_epipe = 1; /* prevent writes while the close is pending */
2806  cf->process_node_index,
2808  /* event data */ uf->private_data);
2809 
2810  return /* no error */ 0;
2811 }
2812 
2813 /** Store a new CLI session.
2814  * @param name The name of the session.
2815  * @param fd The file descriptor for the session I/O.
2816  * @return The session ID.
2817  */
2818 static u32
2820 {
2821  unix_main_t *um = &unix_main;
2823  unix_cli_file_t *cf;
2824  clib_file_t template = { 0 };
2825  vlib_main_t *vm = um->vlib_main;
2826  vlib_node_t *n = 0;
2827  u8 *file_desc = 0;
2828 
2829  file_desc = format (0, "%s", name);
2830 
2831  name = (char *) format (0, "unix-cli-%s", name);
2832 
2834  {
2836  int i;
2837  vlib_main_t *this_vlib_main;
2838  u8 *old_name = 0;
2839 
2840  /*
2841  * Nodes are bulk-copied, so node name pointers are shared.
2842  * Find the cli node in all graph replicas, and give all of them
2843  * the same new name.
2844  * Then, throw away the old shared name-vector.
2845  */
2846  for (i = 0; i < vec_len (vlib_mains); i++)
2847  {
2848  this_vlib_main = vlib_mains[i];
2849  if (this_vlib_main == 0)
2850  continue;
2851  n = vlib_get_node (this_vlib_main,
2852  cm->unused_cli_process_node_indices[l - 1]);
2853  old_name = n->name;
2854  n->name = (u8 *) name;
2855  }
2856  vec_free (old_name);
2857 
2858  vlib_node_set_state (vm, n->index, VLIB_NODE_STATE_POLLING);
2859 
2860  _vec_len (cm->unused_cli_process_node_indices) = l - 1;
2861  }
2862  else
2863  {
2864  static vlib_node_registration_t r = {
2865  .function = unix_cli_process,
2866  .type = VLIB_NODE_TYPE_PROCESS,
2867  .process_log2_n_stack_bytes = 18,
2868  };
2869 
2870  r.name = name;
2871 
2873 
2874  vlib_register_node (vm, &r);
2875  vec_free (name);
2876 
2877  n = vlib_get_node (vm, r.index);
2880  }
2881 
2882  pool_get (cm->cli_file_pool, cf);
2883  clib_memset (cf, 0, sizeof (*cf));
2884 
2885  template.read_function = unix_cli_read_ready;
2886  template.write_function = unix_cli_write_ready;
2887  template.error_function = unix_cli_error_detected;
2888  template.file_descriptor = fd;
2889  template.private_data = cf - cm->cli_file_pool;
2890  template.description = file_desc;
2891 
2892  cf->process_node_index = n->index;
2893  cf->clib_file_index = clib_file_add (fm, &template);
2894  cf->output_vector = 0;
2895  cf->input_vector = 0;
2896 
2898 
2901  p->output_function_arg = cf - cm->cli_file_pool;
2902 
2903  return cf - cm->cli_file_pool;
2904 }
2905 
2906 /** Telnet listening socket has a new connection. */
2907 static clib_error_t *
2909 {
2910  unix_main_t *um = &unix_main;
2913  clib_socket_t *s = &um->cli_listen_socket;
2914  clib_socket_t client;
2915  char *client_name;
2916  clib_error_t *error;
2917  unix_cli_file_t *cf;
2918  u32 cf_index;
2919  int one;
2920 
2921  error = clib_socket_accept (s, &client);
2922  if (error)
2923  return error;
2924 
2925  /* Disable Nagle, ignore any errors doing so eg on PF_LOCAL socket */
2926  one = 1;
2927  (void) setsockopt (client.fd, IPPROTO_TCP, TCP_NODELAY,
2928  (void *) &one, sizeof (one));
2929 
2930  client_name = (char *) format (0, "%U%c", format_sockaddr, &client.peer, 0);
2931 
2932  cf_index = unix_cli_file_add (cm, client_name, client.fd);
2933  cf = pool_elt_at_index (cm->cli_file_pool, cf_index);
2934  cf->is_socket = 1;
2935 
2936  /* No longer need CLIB version of socket. */
2937  clib_socket_free (&client);
2938  vec_free (client_name);
2939 
2940  /* if we're supposed to run telnet session in character mode (default) */
2941  if (um->cli_line_mode == 0)
2942  {
2943  /*
2944  * Set telnet client character mode, echo on, suppress "go-ahead".
2945  * Technically these should be negotiated, but this works.
2946  */
2947  u8 charmode_option[] = {
2948  IAC, WONT, TELOPT_LINEMODE, /* server will do char-by-char */
2949  IAC, DONT, TELOPT_LINEMODE, /* client should do char-by-char */
2950  IAC, WILL, TELOPT_SGA, /* server willl supress GA */
2951  IAC, DO, TELOPT_SGA, /* client should supress Go Ahead */
2952  IAC, WILL, TELOPT_ECHO, /* server will do echo */
2953  IAC, DONT, TELOPT_ECHO, /* client should not echo */
2954  IAC, DO, TELOPT_TTYPE, /* client should tell us its term type */
2955  IAC, SB, TELOPT_TTYPE, 1, IAC, SE, /* now tell me ttype */
2956  IAC, DO, TELOPT_NAWS, /* client should tell us its window sz */
2957  IAC, SB, TELOPT_NAWS, 1, IAC, SE, /* now tell me window size */
2958  };
2959 
2960  /* Enable history on this CLI */
2961  cf->history_limit = um->cli_history_limit;
2962  cf->has_history = cf->history_limit != 0;
2963 
2964  /* This is an interactive session until we decide otherwise */
2965  cf->is_interactive = 1;
2966 
2967  /* Make sure this session is in line mode */
2968  cf->line_mode = 0;
2969 
2970  /* We need CRLF */
2971  cf->crlf_mode = 1;
2972 
2973  /* Setup the pager */
2974  cf->no_pager = um->cli_no_pager;
2975 
2976  /* Default terminal dimensions, should the terminal
2977  * fail to provide any.
2978  */
2981 
2982  /* Send the telnet options */
2984  unix_vlib_cli_output_raw (cf, uf, charmode_option,
2985  ARRAY_LEN (charmode_option));
2986 
2987  if (cm->new_session_process_node_index == ~0)
2988  {
2989  /* Create thw new session deadline process */
2991  vlib_process_create (um->vlib_main, "unix-cli-new-session",
2993  16 /* log2_n_stack_bytes */ );
2994  }
2995 
2996  /* In case the client doesn't negotiate terminal type, register
2997  * our session with a process that will emit the prompt if
2998  * a deadline passes */
3001  UNIX_CLI_NEW_SESSION_EVENT_ADD, cf_index);
3002 
3003  }
3004 
3005  return error;
3006 }
3007 
3008 /** The system terminal has informed us that the window size
3009  * has changed.
3010  */
3011 static void
3013 {
3017  cm->stdin_cli_file_index);
3019  struct winsize ws;
3020  (void) signum;
3021 
3022  /* Terminal resized, fetch the new size */
3023  if (ioctl (STDIN_FILENO, TIOCGWINSZ, &ws) < 0)
3024  {
3025  /* "Should never happen..." */
3026  clib_unix_warning ("TIOCGWINSZ");
3027  /* We can't trust ws.XXX... */
3028  return;
3029  }
3030 
3031  cf->width = ws.ws_col;
3034  if (cf->width == 0)
3036 
3037  cf->height = ws.ws_row;
3040  if (cf->height == 0)
3042 
3043  /* Reindex the pager buffer */
3045 
3046  /* Redraw the page */
3047  unix_cli_pager_redraw (cf, uf);
3048 }
3049 
3050 /** Handle configuration directives in the @em unix section. */
3051 static clib_error_t *
3053 {
3054  unix_main_t *um = &unix_main;
3057  int flags;
3058  clib_error_t *error = 0;
3059  unix_cli_file_t *cf;
3060  u32 cf_index;
3061  struct termios tio;
3062  struct sigaction sa;
3063  struct winsize ws;
3064  u8 *term;
3065 
3066  /* We depend on unix flags being set. */
3067  if ((error = vlib_call_config_function (vm, unix_config)))
3068  return error;
3069 
3070  if (um->flags & UNIX_FLAG_INTERACTIVE)
3071  {
3072  /* Set stdin to be non-blocking. */
3073  if ((flags = fcntl (STDIN_FILENO, F_GETFL, 0)) < 0)
3074  flags = 0;
3075  (void) fcntl (STDIN_FILENO, F_SETFL, flags | O_NONBLOCK);
3076 
3077  cf_index = unix_cli_file_add (cm, "stdin", STDIN_FILENO);
3078  cf = pool_elt_at_index (cm->cli_file_pool, cf_index);
3079  cm->stdin_cli_file_index = cf_index;
3080 
3081  /* If stdin is a tty and we are using chacracter mode, enable
3082  * history on the CLI and set the tty line discipline accordingly. */
3083  if (isatty (STDIN_FILENO) && um->cli_line_mode == 0)
3084  {
3085  /* Capture terminal resize events */
3086  clib_memset (&sa, 0, sizeof (sa));
3087  sa.sa_handler = unix_cli_resize_interrupt;
3088  if (sigaction (SIGWINCH, &sa, 0) < 0)
3089  clib_panic ("sigaction");
3090 
3091  /* Retrieve the current terminal size */
3092  ioctl (STDIN_FILENO, TIOCGWINSZ, &ws);
3093  cf->width = ws.ws_col;
3094  cf->height = ws.ws_row;
3095 
3096  if (cf->width == 0 || cf->height == 0)
3097  {
3098  /*
3099  * We have a tty, but no size. Use defaults.
3100  * vpp "unix interactive" inside emacs + gdb ends up here.
3101  */
3104  }
3105 
3106  /* Setup the history */
3107  cf->history_limit = um->cli_history_limit;
3108  cf->has_history = cf->history_limit != 0;
3109 
3110  /* Setup the pager */
3111  cf->no_pager = um->cli_no_pager;
3112 
3113  /* This is an interactive session until we decide otherwise */
3114  cf->is_interactive = 1;
3115 
3116  /* We're going to be in char by char mode */
3117  cf->line_mode = 0;
3118 
3119  /* Save the original tty state so we can restore it later */
3120  tcgetattr (STDIN_FILENO, &um->tio_stdin);
3121  um->tio_isset = 1;
3122 
3123  /* Tweak the tty settings */
3124  tio = um->tio_stdin;
3125  /* echo off, canonical mode off, ext'd input processing off */
3126  tio.c_lflag &= ~(ECHO | ICANON | IEXTEN);
3127  /* disable XON/XOFF, so ^S invokes the history search */
3128  tio.c_iflag &= ~(IXON | IXOFF);
3129  tio.c_cc[VMIN] = 1; /* 1 byte at a time */
3130  tio.c_cc[VTIME] = 0; /* no timer */
3131  tio.c_cc[VSTOP] = _POSIX_VDISABLE; /* not ^S */
3132  tio.c_cc[VSTART] = _POSIX_VDISABLE; /* not ^Q */
3133  tcsetattr (STDIN_FILENO, TCSAFLUSH, &tio);
3134 
3135  /* See if we can do ANSI/VT100 output */
3136  term = (u8 *) getenv ("TERM");
3137  if (term != NULL)
3138  {
3139  int len = strlen ((char *) term);
3140  cf->ansi_capable = unix_cli_terminal_type_ansi (term, len);
3141  if (unix_cli_terminal_type_noninteractive (term, len))
3143  }
3144  }
3145  else
3146  {
3147  /* No tty, so make sure the session doesn't have tty-like features */
3149  }
3150 
3151  /* Send banner and initial prompt */
3152  unix_cli_file_welcome (cm, cf);
3153  }
3154 
3155  /* If we have socket config, LISTEN, otherwise, don't */
3156  clib_socket_t *s = &um->cli_listen_socket;
3157  if (s->config && s->config[0] != 0)
3158  {
3159  /* CLI listen. */
3160  clib_file_t template = { 0 };
3161 
3162  /* mkdir of file socketu, only under /run */
3163  if (strncmp (s->config, "/run", 4) == 0)
3164  {
3165  u8 *tmp = format (0, "%s", s->config);
3166  int i = vec_len (tmp);
3167  while (i && tmp[--i] != '/')
3168  ;
3169 
3170  tmp[i] = 0;
3171 
3172  if (i)
3173  vlib_unix_recursive_mkdir ((char *) tmp);
3174  vec_free (tmp);
3175  }
3176 
3177  s->flags = CLIB_SOCKET_F_IS_SERVER | /* listen, don't connect */
3178  CLIB_SOCKET_F_ALLOW_GROUP_WRITE; /* PF_LOCAL socket only */
3179  error = clib_socket_init (s);
3180 
3181  if (error)
3182  return error;
3183 
3184  template.read_function = unix_cli_listen_read_ready;
3185  template.file_descriptor = s->fd;
3186  template.description = format (0, "cli listener %s", s->config);
3187 
3188  clib_file_add (fm, &template);
3189  }
3190 
3191  /* Set CLI prompt. */
3192  if (!cm->cli_prompt)
3193  cm->cli_prompt = format (0, "VLIB: ");
3194 
3195  return 0;
3196 }
3197 
3198 /*?
3199  * This module has no configurable parameters.
3200 ?*/
3202 
3203 /** Called when VPP is shutting down, this restores the system
3204  * terminal state if previously saved.
3205  */
3206 static clib_error_t *
3208 {
3209  unix_main_t *um = &unix_main;
3210 
3211  /* If stdin is a tty and we saved the tty state, reset the tty state */
3212  if (isatty (STDIN_FILENO) && um->tio_isset)
3213  tcsetattr (STDIN_FILENO, TCSAFLUSH, &um->tio_stdin);
3214 
3215  return 0;
3216 }
3217 
3219 
3220 /** Set the CLI prompt.
3221  * @param prompt The C string to set the prompt to.
3222  * @note This setting is global; it impacts all current
3223  * and future CLI sessions.
3224  */
3225 void
3227 {
3228  char *fmt = (prompt[strlen (prompt) - 1] == ' ') ? "%s" : "%s ";
3230  if (cm->cli_prompt)
3231  vec_free (cm->cli_prompt);
3232  cm->cli_prompt = format (0, fmt, prompt);
3233 }
3234 
3235 static unix_cli_file_t *
3237 {
3238  if (!cm->cli_file_pool)
3239  return 0;
3241 }
3242 
3243 static unix_cli_file_t *
3245 {
3246  unix_cli_file_t *cf;
3247  if ((cf = unix_cli_file_if_exists (cm)) && !cf->is_interactive)
3248  return 0;
3249  return cf;
3250 }
3251 
3252 /** CLI command to quit the terminal session.
3253  * @note If this is a stdin session then this will
3254  * shutdown VPP also.
3255  */
3256 static clib_error_t *
3258  unformat_input_t * input, vlib_cli_command_t * cmd)
3259 {
3261  unix_cli_file_t *cf;
3262 
3263  if (!(cf = unix_cli_file_if_exists (cm)))
3264  return clib_error_return (0, "invalid session");
3265 
3266  /* Cosmetic: suppress the final prompt from appearing before we die */
3267  cf->is_interactive = 0;
3268  cf->started = 1;
3269 
3271  vlib_current_process (vm),
3274  return 0;
3275 }
3276 
3277 /*?
3278  * Terminates the current CLI session.
3279  *
3280  * If VPP is running in @em interactive mode and this is the console session
3281  * (that is, the session on @c stdin) then this will also terminate VPP.
3282 ?*/
3283 /* *INDENT-OFF* */
3284 VLIB_CLI_COMMAND (unix_cli_quit_command, static) = {
3285  .path = "quit",
3286  .short_help = "Exit CLI",
3287  .function = unix_cli_quit,
3288 };
3289 /* *INDENT-ON* */
3290 
3291 /* *INDENT-OFF* */
3292 VLIB_CLI_COMMAND (unix_cli_q_command, static) = {
3293  .path = "q",
3294  .short_help = "Exit CLI",
3295  .function = unix_cli_quit,
3296 };
3297 /* *INDENT-ON* */
3298 
3299 /** CLI command to execute a VPP command script. */
3300 static clib_error_t *
3302  unformat_input_t * input, vlib_cli_command_t * cmd)
3303 {
3304  char *file_name;
3305  int fd;
3306  unformat_input_t sub_input;
3307  clib_error_t *error;
3308 
3309  file_name = 0;
3310  fd = -1;
3311  error = 0;
3312 
3313  if (!unformat (input, "%s", &file_name))
3314  {
3315  error = clib_error_return (0, "expecting file name, got `%U'",
3316  format_unformat_error, input);
3317  goto done;
3318  }
3319 
3320  fd = open (file_name, O_RDONLY);
3321  if (fd < 0)
3322  {
3323  error = clib_error_return_unix (0, "failed to open `%s'", file_name);
3324  goto done;
3325  }
3326 
3327  /* Make sure its a regular file. */
3328  {
3329  struct stat s;
3330 
3331  if (fstat (fd, &s) < 0)
3332  {
3333  error = clib_error_return_unix (0, "failed to stat `%s'", file_name);
3334  goto done;
3335  }
3336 
3337  if (!(S_ISREG (s.st_mode) || S_ISLNK (s.st_mode)))
3338  {
3339  error = clib_error_return (0, "not a regular file `%s'", file_name);
3340  goto done;
3341  }
3342  }
3343 
3344  unformat_init_clib_file (&sub_input, fd);
3345 
3346  vlib_cli_input (vm, &sub_input, 0, 0);
3347  unformat_free (&sub_input);
3348 
3349 done:
3350  if (fd > 0)
3351  close (fd);
3352  vec_free (file_name);
3353 
3354  return error;
3355 }
3356 
3357 /*?
3358  * Executes a sequence of CLI commands which are read from a file. If
3359  * a command is unrecognised or otherwise invalid then the usual CLI
3360  * feedback will be generated, however execution of subsequent commands
3361  * from the file will continue.
3362  *
3363  * The VPP code is indifferent to the file location. However, if SELinux
3364  * is enabled, then the file needs to have an SELinux label the VPP
3365  * process is allowed to access. For example, if a file is created in
3366  * '<em>/usr/share/vpp/</em>', it will be allowed. However, files manually
3367  * created in '/tmp/' or '/home/<user>/' will not be accessible by the VPP
3368  * process when SELinux is enabled.
3369  *
3370  * @cliexpar
3371  * Sample file:
3372  * @clistart
3373  * <b><em>$ cat /usr/share/vpp/scripts/gigup.txt</em></b>
3374  * set interface state GigabitEthernet0/8/0 up
3375  * set interface state GigabitEthernet0/9/0 up
3376  * @cliend
3377  * Example of how to execute a set of CLI commands from a file:
3378  * @cliexcmd{exec /usr/share/vpp/scripts/gigup.txt}
3379 ?*/
3380 /* *INDENT-OFF* */
3381 VLIB_CLI_COMMAND (cli_exec, static) = {
3382  .path = "exec",
3383  .short_help = "exec <filename>",
3384  .function = unix_cli_exec,
3385  .is_mp_safe = 1,
3386 };
3387 /* *INDENT-ON* */
3388 
3389 /** CLI command to show various unix error statistics. */
3390 static clib_error_t *
3392  unformat_input_t * input, vlib_cli_command_t * cmd)
3393 {
3394  unix_main_t *um = &unix_main;
3395  clib_error_t *error = 0;
3396  int i, n_errors_to_show;
3397  unix_error_history_t *unix_errors = 0;
3398 
3399  n_errors_to_show = 1 << 30;
3400 
3402  {
3403  if (!unformat (input, "%d", &n_errors_to_show))
3404  {
3405  error =
3406  clib_error_return (0,
3407  "expecting integer number of errors to show, got `%U'",
3408  format_unformat_error, input);
3409  goto done;
3410  }
3411  }
3412 
3413  n_errors_to_show =
3414  clib_min (ARRAY_LEN (um->error_history), n_errors_to_show);
3415 
3416  i =
3417  um->error_history_index >
3418  0 ? um->error_history_index - 1 : ARRAY_LEN (um->error_history) - 1;
3419 
3420  while (n_errors_to_show > 0)
3421  {
3422  unix_error_history_t *eh = um->error_history + i;
3423 
3424  if (!eh->error)
3425  break;
3426 
3427  vec_add1 (unix_errors, eh[0]);
3428  n_errors_to_show -= 1;
3429  if (i == 0)
3430  i = ARRAY_LEN (um->error_history) - 1;
3431  else
3432  i--;
3433  }
3434 
3435  if (vec_len (unix_errors) == 0)
3436  vlib_cli_output (vm, "no Unix errors so far");
3437  else
3438  {
3439  vlib_cli_output (vm, "%Ld total errors seen", um->n_total_errors);
3440  for (i = vec_len (unix_errors) - 1; i >= 0; i--)
3441  {
3442  unix_error_history_t *eh = vec_elt_at_index (unix_errors, i);
3443  vlib_cli_output (vm, "%U: %U",
3444  format_time_interval, "h:m:s:u", eh->time,
3445  format_clib_error, eh->error);
3446  }
3447  vlib_cli_output (vm, "%U: time now",
3448  format_time_interval, "h:m:s:u", vlib_time_now (vm));
3449  }
3450 
3451 done:
3452  vec_free (unix_errors);
3453  return error;
3454 }
3455 
3456 /* *INDENT-OFF* */
3457 VLIB_CLI_COMMAND (cli_unix_show_errors, static) = {
3458  .path = "show unix errors",
3459  .short_help = "Show Unix system call error history",
3460  .function = unix_show_errors,
3461 };
3462 /* *INDENT-ON* */
3463 
3464 /** CLI command to show various unix error statistics. */
3465 static clib_error_t *
3467  unformat_input_t * input, vlib_cli_command_t * cmd)
3468 {
3469  clib_error_t *error = 0;
3471  clib_file_t *f;
3472  char path[PATH_MAX];
3473  u8 *s = 0;
3474 
3475  vlib_cli_output (vm, "%3s %6s %12s %12s %12s %-32s %s", "FD", "Thread",
3476  "Read", "Write", "Error", "File Name", "Description");
3477 
3478  /* *INDENT-OFF* */
3479  pool_foreach (f, fm->file_pool,(
3480  {
3481  int rv;
3482  s = format (s, "/proc/self/fd/%d%c", f->file_descriptor, 0);
3483  rv = readlink((char *) s, path, PATH_MAX - 1);
3484 
3485  path[rv < 0 ? 0 : rv] = 0;
3486 
3487  vlib_cli_output (vm, "%3d %6d %12d %12d %12d %-32s %v",
3488  f->file_descriptor, f->polling_thread_index,
3489  f->read_events, f->write_events, f->error_events,
3490  path, f->description);
3491  vec_reset_length (s);
3492  }));
3493  /* *INDENT-ON* */
3494  vec_free (s);
3495 
3496  return error;
3497 }
3498 
3499 /* *INDENT-OFF* */
3500 VLIB_CLI_COMMAND (cli_unix_show_files, static) = {
3501  .path = "show unix files",
3502  .short_help = "Show Unix files in use",
3503  .function = unix_show_files,
3504 };
3505 /* *INDENT-ON* */
3506 
3507 /** CLI command to show session command history. */
3508 static clib_error_t *
3510  unformat_input_t * input, vlib_cli_command_t * cmd)
3511 {
3513  unix_cli_file_t *cf;
3514  int i, j;
3515 
3516  if (!(cf = unix_cli_file_if_interactive (cm)))
3517  return clib_error_return (0, "invalid for non-interactive sessions");
3518 
3519  if (cf->has_history && cf->history_limit)
3520  {
3521  i = 1 + cf->command_number - vec_len (cf->command_history);
3522  for (j = 0; j < vec_len (cf->command_history); j++)
3523  vlib_cli_output (vm, "%d %v\n", i + j, cf->command_history[j]);
3524  }
3525  else
3526  {
3527  vlib_cli_output (vm, "History not enabled.\n");
3528  }
3529 
3530  return 0;
3531 }
3532 
3533 /*?
3534  * Displays the command history for the current session, if any.
3535 ?*/
3536 /* *INDENT-OFF* */
3537 VLIB_CLI_COMMAND (cli_unix_cli_show_history, static) = {
3538  .path = "history",
3539  .short_help = "Show current session command history",
3540  .function = unix_cli_show_history,
3541 };
3542 /* *INDENT-ON* */
3543 
3544 /** CLI command to show terminal status. */
3545 static clib_error_t *
3547  unformat_input_t * input, vlib_cli_command_t * cmd)
3548 {
3549  unix_main_t *um = &unix_main;
3551  unix_cli_file_t *cf;
3552  vlib_node_t *n;
3553 
3554  if (!(cf = unix_cli_file_if_exists (cm)))
3555  return clib_error_return (0, "invalid session");
3556 
3557  n = vlib_get_node (vm, cf->process_node_index);
3558 
3559  vlib_cli_output (vm, "Terminal name: %v\n", n->name);
3560  vlib_cli_output (vm, "Terminal mode: %s\n", cf->line_mode ?
3561  "line-by-line" : "char-by-char");
3562  vlib_cli_output (vm, "Terminal width: %d\n", cf->width);
3563  vlib_cli_output (vm, "Terminal height: %d\n", cf->height);
3564  vlib_cli_output (vm, "ANSI capable: %s\n",
3565  cf->ansi_capable ? "yes" : "no");
3566  vlib_cli_output (vm, "Interactive: %s\n",
3567  cf->is_interactive ? "yes" : "no");
3568  vlib_cli_output (vm, "History enabled: %s%s\n",
3569  cf->has_history ? "yes" : "no", !cf->has_history
3570  || cf->history_limit ? "" :
3571  " (disabled by history limit)");
3572  if (cf->has_history)
3573  vlib_cli_output (vm, "History limit: %d\n", cf->history_limit);
3574  vlib_cli_output (vm, "Pager enabled: %s%s%s\n",
3575  cf->no_pager ? "no" : "yes",
3576  cf->no_pager
3577  || cf->height ? "" : " (disabled by terminal height)",
3578  cf->no_pager
3579  || um->cli_pager_buffer_limit ? "" :
3580  " (disabled by buffer limit)");
3581  if (!cf->no_pager)
3582  vlib_cli_output (vm, "Pager limit: %d\n", um->cli_pager_buffer_limit);
3583  vlib_cli_output (vm, "CRLF mode: %s\n",
3584  cf->crlf_mode ? "CR+LF" : "LF");
3585 
3586  return 0;
3587 }
3588 
3589 /*?
3590  * Displays various information about the state of the current terminal
3591  * session.
3592  *
3593  * @cliexpar
3594  * @cliexstart{show terminal}
3595  * Terminal name: unix-cli-stdin
3596  * Terminal mode: char-by-char
3597  * Terminal width: 123
3598  * Terminal height: 48
3599  * ANSI capable: yes
3600  * Interactive: yes
3601  * History enabled: yes
3602  * History limit: 50
3603  * Pager enabled: yes
3604  * Pager limit: 100000
3605  * CRLF mode: LF
3606  * @cliexend
3607 ?*/
3608 /* *INDENT-OFF* */
3609 VLIB_CLI_COMMAND (cli_unix_cli_show_terminal, static) = {
3610  .path = "show terminal",
3611  .short_help = "Show current session terminal settings",
3612  .function = unix_cli_show_terminal,
3613 };
3614 /* *INDENT-ON* */
3615 
3616 /** CLI command to display a list of CLI sessions. */
3617 static clib_error_t *
3619  unformat_input_t * input,
3620  vlib_cli_command_t * cmd)
3621 {
3624  unix_cli_file_t *cf;
3625  clib_file_t *uf;
3626  vlib_node_t *n;
3627 
3628  vlib_cli_output (vm, "%-5s %-5s %-20s %s", "PNI", "FD", "Name", "Flags");
3629 
3630 #define fl(x, y) ( (x) ? toupper((y)) : tolower((y)) )
3631  /* *INDENT-OFF* */
3632  pool_foreach (cf, cm->cli_file_pool, ({
3633  uf = pool_elt_at_index (fm->file_pool, cf->clib_file_index);
3634  n = vlib_get_node (vm, cf->process_node_index);
3635  vlib_cli_output (vm,
3636  "%-5d %-5d %-20v %c%c%c%c%c\n",
3637  cf->process_node_index,
3638  uf->file_descriptor,
3639  n->name,
3640  fl (cf->is_interactive, 'i'),
3641  fl (cf->is_socket, 's'),
3642  fl (cf->line_mode, 'l'),
3643  fl (cf->has_epipe, 'p'),
3644  fl (cf->ansi_capable, 'a'));
3645  }));
3646  /* *INDENT-ON* */
3647 #undef fl
3648 
3649  return 0;
3650 }
3651 
3652 /*?
3653  * Displays a summary of all the current CLI sessions.
3654  *
3655  * Typically used to diagnose connection issues with the CLI
3656  * socket.
3657  *
3658  * @cliexpar
3659  * @cliexstart{show cli-sessions}
3660  * PNI FD Name Flags
3661  * 343 0 unix-cli-stdin IslpA
3662  * 344 7 unix-cli-local:20 ISlpA
3663  * 346 8 unix-cli-local:21 iSLpa
3664  * @cliexend
3665 
3666  * In this example we have the debug console of the running process
3667  * on stdin/out, we have an interactive socket session and we also
3668  * have a non-interactive socket session.
3669  *
3670  * Fields:
3671  *
3672  * - @em PNI: Process node index.
3673  * - @em FD: Unix file descriptor.
3674  * - @em Name: Name of the session.
3675  * - @em Flags: Various flags that describe the state of the session.
3676  *
3677  * @em Flags have the following meanings; lower-case typically negates
3678  * upper-case:
3679  *
3680  * - @em I Interactive session.
3681  * - @em S Connected by socket.
3682  * - @em s Not a socket, likely stdin.
3683  * - @em L Line-by-line mode.
3684  * - @em l Char-by-char mode.
3685  * - @em P EPIPE detected on connection; it will close soon.
3686  * - @em A ANSI-capable terminal.
3687 ?*/
3688 /* *INDENT-OFF* */
3689 VLIB_CLI_COMMAND (cli_unix_cli_show_cli_sessions, static) = {
3690  .path = "show cli-sessions",
3691  .short_help = "Show current CLI sessions",
3692  .function = unix_cli_show_cli_sessions,
3693 };
3694 /* *INDENT-ON* */
3695 
3696 /** CLI command to set terminal pager settings. */
3697 static clib_error_t *
3699  unformat_input_t * input,
3700  vlib_cli_command_t * cmd)
3701 {
3702  unix_main_t *um = &unix_main;
3704  unix_cli_file_t *cf;
3705  unformat_input_t _line_input, *line_input = &_line_input;
3706  clib_error_t *error = 0;
3707 
3708  if (!(cf = unix_cli_file_if_interactive (cm)))
3709  return clib_error_return (0, "invalid for non-interactive sessions");
3710 
3711  if (!unformat_user (input, unformat_line_input, line_input))
3712  return 0;
3713 
3714  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3715  {
3716  if (unformat (line_input, "on"))
3717  cf->no_pager = 0;
3718  else if (unformat (line_input, "off"))
3719  cf->no_pager = 1;
3720  else if (unformat (line_input, "limit %u", &um->cli_pager_buffer_limit))
3721  vlib_cli_output (vm,
3722  "Pager limit set to %u lines; note, this is global.\n",
3724  else
3725  {
3726  error = clib_error_return (0, "unknown parameter: `%U`",
3727  format_unformat_error, line_input);
3728  goto done;
3729  }
3730  }
3731 
3732 done:
3733  unformat_free (line_input);
3734 
3735  return error;
3736 }
3737 
3738 /*?
3739  * Enables or disables the terminal pager for this session. Generally
3740  * this defaults to enabled.
3741  *
3742  * Additionally allows the pager buffer size to be set; though note that
3743  * this value is set globally and not per session.
3744 ?*/
3745 /* *INDENT-OFF* */
3746 VLIB_CLI_COMMAND (cli_unix_cli_set_terminal_pager, static) = {
3747  .path = "set terminal pager",
3748  .short_help = "set terminal pager [on|off] [limit <lines>]",
3749  .function = unix_cli_set_terminal_pager,
3750 };
3751 /* *INDENT-ON* */
3752 
3753 /** CLI command to set terminal history settings. */
3754 static clib_error_t *
3756  unformat_input_t * input,
3757  vlib_cli_command_t * cmd)
3758 {
3760  unix_cli_file_t *cf;
3761  unformat_input_t _line_input, *line_input = &_line_input;
3762  u32 limit;
3763  clib_error_t *error = 0;
3764 
3765  if (!(cf = unix_cli_file_if_interactive (cm)))
3766  return clib_error_return (0, "invalid for non-interactive sessions");
3767 
3768  if (!unformat_user (input, unformat_line_input, line_input))
3769  return 0;
3770 
3771  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3772  {
3773  if (unformat (line_input, "on"))
3774  cf->has_history = 1;
3775  else if (unformat (line_input, "off"))
3776  cf->has_history = 0;
3777  else if (unformat (line_input, "limit %u", &cf->history_limit))
3778  ;
3779  else
3780  {
3781  error = clib_error_return (0, "unknown parameter: `%U`",
3782  format_unformat_error, line_input);
3783  goto done;
3784  }
3785 
3786  }
3787 
3788  /* If we reduced history size, or turned it off, purge the history */
3789  limit = cf->has_history ? cf->history_limit : 0;
3790  if (limit < vec_len (cf->command_history))
3791  {
3792  u32 i;
3793 
3794  /* How many items to remove from the start of history */
3795  limit = vec_len (cf->command_history) - limit;
3796 
3797  for (i = 0; i < limit; i++)
3798  vec_free (cf->command_history[i]);
3799 
3800  vec_delete (cf->command_history, limit, 0);
3801  }
3802 
3803 done:
3804  unformat_free (line_input);
3805 
3806  return error;
3807 }
3808 
3809 /*?
3810  * Enables or disables the command history function of the current
3811  * terminal. Generally this defaults to enabled.
3812  *
3813  * This command also allows the maximum size of the history buffer for
3814  * this session to be altered.
3815 ?*/
3816 /* *INDENT-OFF* */
3817 VLIB_CLI_COMMAND (cli_unix_cli_set_terminal_history, static) = {
3818  .path = "set terminal history",
3819  .short_help = "set terminal history [on|off] [limit <lines>]",
3820  .function = unix_cli_set_terminal_history,
3821 };
3822 /* *INDENT-ON* */
3823 
3824 /** CLI command to set terminal ANSI settings. */
3825 static clib_error_t *
3827  unformat_input_t * input,
3828  vlib_cli_command_t * cmd)
3829 {
3831  unix_cli_file_t *cf;
3832 
3833  if (!(cf = unix_cli_file_if_interactive (cm)))
3834  return clib_error_return (0, "invalid for non-interactive sessions");
3835 
3836  if (unformat (input, "on"))
3837  cf->ansi_capable = 1;
3838  else if (unformat (input, "off"))
3839  cf->ansi_capable = 0;
3840  else
3841  return clib_error_return (0, "unknown parameter: `%U`",
3842  format_unformat_error, input);
3843 
3844  return 0;
3845 }
3846 
3847 /*?
3848  * Enables or disables the use of ANSI control sequences by this terminal.
3849  * The default will vary based on terminal detection at the start of the
3850  * session.
3851  *
3852  * ANSI control sequences are used in a small number of places to provide,
3853  * for example, color text output and to control the cursor in the pager.
3854 ?*/
3855 /* *INDENT-OFF* */
3856 VLIB_CLI_COMMAND (cli_unix_cli_set_terminal_ansi, static) = {
3857  .path = "set terminal ansi",
3858  .short_help = "set terminal ansi [on|off]",
3859  .function = unix_cli_set_terminal_ansi,
3860 };
3861 /* *INDENT-ON* */
3862 
3863 static clib_error_t *
3865 {
3867 
3868  /* Breadcrumb to indicate the new session process
3869  * has not been started */
3871 
3872  return 0;
3873 }
3874 
3876 
3877 /*
3878  * fd.io coding-style-patch-verification: ON
3879  *
3880  * Local Variables:
3881  * eval: (c-set-style "gnu")
3882  * End:
3883  */
#define vec_validate(V, I)
Make sure vector is long enough for given index (no header, unspecified alignment) ...
Definition: vec.h:439
u32 history_limit
Maximum number of history entries this session will store.
Definition: cli.c:170
u32 command_number
Current command line counter.
Definition: cli.c:173
uword output_function_arg
Definition: node.h:612
u32 error_history_index
Definition: unix.h:68
unix_main_t unix_main
Definition: main.c:62
#define vec_foreach_index(var, v)
Iterate over vector indices.
u8 * format_clib_error(u8 *s, va_list *va)
Definition: error.c:191
static void clib_file_del(clib_file_main_t *um, clib_file_t *f)
Definition: file.h:109
static void unix_cli_ansi_cursor(unix_cli_file_t *cf, clib_file_t *uf, u16 x, u16 y)
Uses an ANSI escape sequence to move the cursor.
Definition: cli.c:861
#define UNIX_CLI_MAX_DEPTH_TELNET
Maximum depth into a byte stream from which to compile a Telnet protocol message. ...
Definition: cli.c:94
u32 flags
Definition: vhost_user.h:141
static clib_error_t * unix_cli_error_detected(clib_file_t *uf)
Called when a CLI session file descriptor has an error condition.
Definition: cli.c:2797
#define clib_min(x, y)
Definition: clib.h:302
u8 is_interactive
Whether the session is interactive or not.
Definition: cli.c:203
u32 pager_start
Line number of top of page.
Definition: cli.c:220
static void unix_vlib_cli_output_raw(unix_cli_file_t *cf, clib_file_t *uf, u8 *buffer, uword buffer_bytes)
Send a buffer to the CLI stream if possible, enqueue it otherwise.
Definition: cli.c:638
Action parser found a partial match.
Definition: cli.c:315
Carriage return, newline or enter.
Definition: cli.c:282
Telnet control code.
Definition: cli.c:301
static f64 vlib_process_wait_for_event_or_clock(vlib_main_t *vm, f64 dt)
Suspend a cooperative multi-tasking thread Waits for an event, or for the indicated number of seconds...
Definition: node_funcs.h:673
Search forwards in command history.
Definition: cli.c:299
static u8 unix_cli_terminal_type_noninteractive(u8 *term, uword len)
Identify whether a terminal type is non-interactive.
Definition: cli.c:1193
unix_cli_process_event_type_t
CLI session events.
Definition: cli.c:450
a
Definition: bitmap.h:538
Exit the pager session.
Definition: cli.c:304
u8 * input_vector
Vector of input saved by Unix input node to be processed by CLI process.
Definition: cli.c:158
static void unix_cli_pager_message(unix_cli_file_t *cf, clib_file_t *uf, char *message, char *postfix)
Output a pager "skipping" message.
Definition: cli.c:823
static uword * vlib_process_wait_for_event(vlib_main_t *vm)
Definition: node_funcs.h:593
static void unix_cli_del_pending_output(clib_file_t *uf, unix_cli_file_t *cf, uword n_bytes)
Delete all bytes from the output vector and flag the I/O system that no more bytes are available to b...
Definition: cli.c:581
static clib_error_t * unix_cli_show_terminal(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
CLI command to show terminal status.
Definition: cli.c:3546
static uword vlib_current_process(vlib_main_t *vm)
Definition: node_funcs.h:400
#define CTL(c)
Given a capital ASCII letter character return a NUL terminated string with the control code for that ...
Definition: cli.c:339
static unix_cli_parse_action_t unix_cli_match_action(unix_cli_parse_actions_t *a, u8 *input, u32 ilen, i32 *matched)
Search for a byte sequence in the action list.
Definition: cli.c:523
u8 * line
The line to print.
Definition: cli.c:108
u32 flags
Definition: unix.h:58
u32 width
Terminal width.
Definition: cli.c:223
Erase cursor right.
Definition: cli.c:285
u8 * cli_prompt
Prompt string for CLI.
Definition: cli.c:475
#define UNIX_CLI_DEFAULT_TERMINAL_WIDTH
Default terminal width.
Definition: cli.c:103
static void unix_cli_set_session_noninteractive(unix_cli_file_t *cf)
Set a session to be non-interactive.
Definition: cli.c:1208
u32 cli_pager_buffer_limit
Definition: unix.h:97
static clib_error_t * unix_show_files(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
CLI command to show various unix error statistics.
Definition: cli.c:3466
u8 ** command_history
Array of vectors of commands in the history.
Definition: cli.c:163
static void unix_vlib_cli_output(uword cli_file_index, u8 *buffer, uword buffer_bytes)
VLIB CLI output function.
Definition: cli.c:1073
clib_memset(h->entries, 0, sizeof(h->entries[0]) *entries)
u32 index
Definition: node.h:280
void vlib_unix_cli_set_prompt(char *prompt)
Set the CLI prompt.
Definition: cli.c:3226
static f64 vlib_time_now(vlib_main_t *vm)
Definition: main.h:279
Scroll to last line.
Definition: cli.c:309
static void unix_cli_pager_redraw(unix_cli_file_t *cf, clib_file_t *uf)
Redraw the currently displayed page of text.
Definition: cli.c:877
unix_cli_new_session_t * new_sessions
List of new sessions.
Definition: cli.c:493
struct termios tio_stdin
Definition: unix.h:103
static void unix_cli_file_free(unix_cli_file_t *f)
Release storage used by a CLI session.
Definition: cli.c:271
u32 file_descriptor
Definition: file.h:54
static u32 unix_cli_file_add(unix_cli_main_t *cm, char *name, int fd)
Store a new CLI session.
Definition: cli.c:2819
Scroll to first line.
Definition: cli.c:308
#define vec_add1(V, E)
Add 1 element to end of vector (unspecified alignment).
Definition: vec.h:522
static clib_error_t * unix_cli_set_terminal_ansi(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
CLI command to set terminal ANSI settings.
Definition: cli.c:3826
static unix_cli_file_t * unix_cli_file_if_interactive(unix_cli_main_t *cm)
Definition: cli.c:3244
Unix CLI session.
Definition: cli.c:148
unix_cli_pager_index_t * pager_index
Index of line fragments in the pager buffer.
Definition: cli.c:217
u8 * current_command
The command currently pointed at by the history cursor.
Definition: cli.c:165
int i
clib_error_t * clib_socket_init(clib_socket_t *s)
Definition: socket.c:384
uword unformat_user(unformat_input_t *input, unformat_function_t *func,...)
Definition: unformat.c:989
#define VLIB_MAIN_LOOP_EXIT_CLI
Definition: main.h:134
#define vlib_call_config_function(vm, x)
Definition: init.h:304
void clib_longjmp(clib_longjmp_t *save, uword return_value)
static clib_error_t * unix_cli_listen_read_ready(clib_file_t *uf)
Telnet listening socket has a new connection.
Definition: cli.c:2908
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:424
#define UNIX_CLI_MAX_TERMINAL_WIDTH
Maximum terminal width we will accept.
Definition: cli.c:97
u8 data[128]
Definition: ipsec.api:251
u32 cursor
Position of the insert cursor on the current input line.
Definition: cli.c:184
clib_socket_t cli_listen_socket
Definition: unix.h:64
static unix_cli_parse_actions_t unix_cli_parse_pager[]
Patterns to match when a CLI session is in the pager.
Definition: cli.c:409
#define pool_get(P, E)
Allocate an object E from a pool P (unspecified alignment).
Definition: pool.h:236
vlib_main_t ** vlib_mains
Definition: buffer.c:332
unix_cli_parse_action_t action
Action to take when matched.
Definition: cli.c:327
unsigned char u8
Definition: types.h:56
static clib_error_t * unix_cli_init(vlib_main_t *vm)
Definition: cli.c:3864
unix_cli_timeout_event_type_t
CLI session telnet negotiation timer events.
Definition: cli.c:457
static uword vlib_process_suspend_time_is_zero(f64 dt)
Returns TRUE if a process suspend time is less than 10us.
Definition: node_funcs.h:410
void unformat_init_clib_file(unformat_input_t *input, int file_descriptor)
Definition: unformat.c:1064
int log_fd
Definition: unix.h:85
Clear the terminal.
Definition: cli.c:297
#define vec_reset_length(v)
Reset vector length to zero NULL-pointer tolerant.
double f64
Definition: types.h:142
#define vlib_worker_thread_barrier_sync(X)
Definition: threads.h:204
#define fm
#define clib_memcpy(d, s, n)
Definition: string.h:180
#define vec_add(V, E, N)
Add N elements to end of vector V (no header, unspecified alignment)
Definition: vec.h:598
#define CLIB_SOCKET_F_IS_SERVER
Definition: socket.h:58
clib_file_t * file_pool
Definition: file.h:88
u8 has_epipe
If EPIPE has been detected, prevent further write-related activity on the descriptor.
Definition: cli.c:211
u8 ansi_capable
Can we do ANSI output?
Definition: cli.c:193
u8 * format_timeval(u8 *s, va_list *args)
Definition: unix-formats.c:771
static void unix_cli_pager_reindex(unix_cli_file_t *cf)
Reindex entire pager buffer.
Definition: cli.c:1000
A CLI session wants to close.
Definition: cli.c:453
#define pool_foreach(VAR, POOL, BODY)
Iterate through pool.
Definition: pool.h:493
i64 word
Definition: types.h:111
void vlib_worker_thread_node_runtime_update(void)
Definition: threads.c:1202
u8 * output_vector
Vector of output pending write to file descriptor.
Definition: cli.c:154
#define VLIB_INIT_FUNCTION(x)
Definition: init.h:173
static uword vlib_process_get_events(vlib_main_t *vm, uword **data_vector)
Return the first event type which has occurred and a vector of per-event data of that type...
Definition: node_funcs.h:516
#define always_inline
Definition: clib.h:99
End key (jump to end of line)
Definition: cli.c:291
#define vec_new(T, N)
Create new vector of given type and length (unspecified alignment, no header).
Definition: vec.h:311
u8 is_socket
Whether the session is attached to a socket.
Definition: cli.c:206
Jump cursor to start of right word.
Definition: cli.c:293
Undo last erase action.
Definition: cli.c:300
u32 len
Length of input without final NUL.
Definition: cli.c:326
Mapping of input buffer strings to action values.
Definition: cli.c:323
vlib_parse_match_t vlib_parse_eval(u8 *input)
#define UNIX_CLI_DEFAULT_TERMINAL_HEIGHT
Default terminal height.
Definition: cli.c:101
#define vec_elt_at_index(v, i)
Get vector value at index i checking that i is in bounds.
#define clib_error_return(e, args...)
Definition: error.h:99
#define ANSI_SCROLLDN
ANSI scroll screen down one line.
Definition: cli.c:86
clib_file_main_t file_main
Definition: main.c:63
u32 process_node_index
Process node identifier.
Definition: cli.c:229
#define vec_resize(V, N)
Resize a vector (no header, unspecified alignment) Add N elements to end of given vector V...
Definition: vec.h:242
u32 offset
Offset of the string in the line.
Definition: cli.c:140
unsigned int u32
Definition: types.h:88
u32 length
Length of the string in the line.
Definition: cli.c:143
vlib_main_t * vlib_main
Definition: unix.h:56
Erase line to right & including cursor.
Definition: cli.c:295
#define ANSI_CLEARLINE
ANSI clear line cursor is on.
Definition: cli.c:84
static void unix_vlib_cli_output_cursor_left(unix_cli_file_t *cf, clib_file_t *uf)
Moves the terminal cursor one character to the left, with special handling when it reaches the left e...
Definition: cli.c:742
static i32 unix_cli_process_telnet(unix_main_t *um, unix_cli_file_t *cf, clib_file_t *uf, u8 *input_vector, uword len)
A mostly no-op Telnet state machine.
Definition: cli.c:1378
u32 * unused_cli_process_node_indices
Vec pool of unused session indices.
Definition: cli.c:481
static clib_error_t * unix_cli_quit(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
CLI command to quit the terminal session.
Definition: cli.c:3257
static void unix_cli_pager_prompt(unix_cli_file_t *cf, clib_file_t *uf)
Output a pager prompt and show number of buffered lines.
Definition: cli.c:800
unformat_function_t unformat_line_input
Definition: format.h:283
unix_cli_file_t * cli_file_pool
Vec pool of CLI sessions.
Definition: cli.c:478
vnet_crypto_main_t * cm
Definition: quic_crypto.c:41
u32 vlib_process_create(vlib_main_t *vm, char *name, vlib_node_function_t *f, u32 log2_n_stack_bytes)
Create a vlib process.
Definition: node.c:743
int search_mode
If non-zero then the CLI is searching in the history array.
Definition: cli.c:181
#define pool_elt_at_index(p, i)
Returns pointer to element at given index.
Definition: pool.h:514
#define ANSI_RESTCURSOR
ANSI restore cursor position if previously saved.
Definition: cli.c:90
int cli_line_mode
Definition: unix.h:88
static void vlib_process_signal_event(vlib_main_t *vm, uword node_index, uword type_opaque, uword data)
Definition: node_funcs.h:934
clib_error_t * clib_socket_accept(clib_socket_t *server, clib_socket_t *client)
Definition: socket.c:526
static void unix_cli_pager_reset(unix_cli_file_t *f)
Resets the pager buffer and other data.
Definition: cli.c:250
Scroll to previous page.
Definition: cli.c:311
u8 ** vlib_cli_get_possible_completions(u8 *str)
Definition: cli.c:259
struct _unformat_input_t unformat_input_t
unsigned short u16
Definition: types.h:57
#define clib_error_return_unix(e, args...)
Definition: error.h:102
static u8 unix_cli_terminal_type_ansi(u8 *term, uword len)
Identify whether a terminal type is ANSI capable.
Definition: cli.c:1161
int cli_no_banner
Definition: unix.h:94
Home key (jump to start of line)
Definition: cli.c:290
#define pool_put(P, E)
Free an object E in pool P.
Definition: pool.h:286
static clib_error_t * unix_cli_read_ready(clib_file_t *uf)
Called when a CLI session file descriptor has data to be read.
Definition: cli.c:2758
#define ANSI_BOLD
ANSI Start bold text.
Definition: cli.c:76
static unix_cli_banner_t unix_cli_banner[]
Plain welcome banner.
Definition: cli.c:114
u32 flags
Definition: file.h:56
static clib_error_t * unix_show_errors(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
CLI command to show various unix error statistics.
Definition: cli.c:3391
#define VLIB_CONFIG_FUNCTION(x, n,...)
Definition: init.h:182
Search backwards in command history.
Definition: cli.c:298
static unix_cli_file_t * unix_cli_file_if_exists(unix_cli_main_t *cm)
Definition: cli.c:3236
u8 * input
Input string to match.
Definition: cli.c:325
void(* file_update)(clib_file_t *file, clib_file_update_type_t update_type)
Definition: file.h:90
u32 node_index
Node index.
Definition: node.h:496
u8 name[64]
Definition: memclnt.api:152
static void unix_cli_cli_prompt(unix_cli_file_t *cf, clib_file_t *uf)
Output the CLI prompt.
Definition: cli.c:789
u32 cli_history_limit
Definition: unix.h:91
u8 len
Definition: ip_types.api:90
Scroll to next page.
Definition: cli.c:305
Erase line to left of cursor.
Definition: cli.c:294
u8 * name
Definition: node.h:264
u8 * format_sockaddr(u8 *s, va_list *args)
Definition: unix-formats.c:239
#define CSI
ANSI Control Sequence Introducer.
Definition: cli.c:69
void unformat_init_vector(unformat_input_t *input, u8 *vector_string)
Definition: unformat.c:1037
u8 ** pager_vector
Pager buffer.
Definition: cli.c:214
#define UNFORMAT_END_OF_INPUT
Definition: format.h:145
unix_error_history_t error_history[128]
Definition: unix.h:67
svmdb_client_t * c
u32 runtime_index
Definition: node.h:283
vlib_main_t * vm
Definition: buffer.c:323
static void unix_vlib_cli_output_cooked(unix_cli_file_t *cf, clib_file_t *uf, u8 *buffer, uword buffer_bytes)
Process a buffer for CRLF handling before outputting it to the CLI.
Definition: cli.c:689
static unix_cli_banner_t unix_cli_banner_color[]
ANSI color welcome banner.
Definition: cli.c:123
u32 current_input_file_index
File pool index of current input.
Definition: cli.c:487
#define vec_free(V)
Free vector&#39;s memory (no header).
Definition: vec.h:341
int cli_no_pager
Definition: unix.h:100
#define VLIB_MAIN_LOOP_EXIT_FUNCTION(x)
Definition: init.h:178
static clib_error_t * unix_cli_write_ready(clib_file_t *uf)
Called when a CLI session file descriptor can be written to without blocking.
Definition: cli.c:2716
#define clib_warning(format, args...)
Definition: error.h:59
#define ANSI_SAVECURSOR
ANSI save cursor position.
Definition: cli.c:88
static clib_error_t * unix_cli_set_terminal_history(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
CLI command to set terminal history settings.
Definition: cli.c:3755
#define pool_is_free_index(P, I)
Use free bitmap to query whether given index is free.
Definition: pool.h:283
u32 line
Index into pager_vector.
Definition: cli.c:137
Down arrow.
Definition: cli.c:287
#define ARRAY_LEN(x)
Definition: clib.h:63
A file descriptor has data to be read.
Definition: cli.c:452
#define ESC
ANSI escape code.
Definition: cli.c:66
Jump cursor to start of left word.
Definition: cli.c:292
u8 no_pager
Disable the pager?
Definition: cli.c:199
int tio_isset
Definition: unix.h:104
Right arrow.
Definition: cli.c:289
#define VLIB_CLI_COMMAND(x,...)
Definition: cli.h:161
Enter pressed (CR, CRLF, LF, etc)
Definition: cli.c:303
signed int i32
Definition: types.h:77
Add a CLI session to the new session list.
Definition: cli.c:459
Up arrow.
Definition: cli.c:286
static void unix_cli_kill(unix_cli_main_t *cm, uword cli_file_index)
Destroy a CLI session.
Definition: cli.c:2637
#define vec_delete(V, N, M)
Delete N elements starting at element M.
Definition: vec.h:784
static word unix_vlib_findchr(u8 chr, u8 *str, word len)
A bit like strchr with a buffer length limit.
Definition: cli.c:611
unix_cli_parse_action_t
CLI actions.
Definition: cli.c:279
static uword clib_file_add(clib_file_main_t *um, clib_file_t *template)
Definition: file.h:96
u32 vlib_register_node(vlib_main_t *vm, vlib_node_registration_t *r)
Definition: node.c:502
#define UNIX_FLAG_INTERACTIVE
Definition: unix.h:60
Erase cursor left.
Definition: cli.c:284
u32 new_session_process_node_index
New session process node identifier.
Definition: cli.c:490
static clib_error_t * unix_cli_set_terminal_pager(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
CLI command to set terminal pager settings.
Definition: cli.c:3698
uword cf_index
Session index of the new session.
Definition: cli.c:467
static clib_error_t * unix_cli_config(vlib_main_t *vm, unformat_input_t *input)
Handle configuration directives in the unix section.
Definition: cli.c:3052
#define vec_append(v1, v2)
Append v2 after v1.
Definition: vec.h:818
struct _socket_t clib_socket_t
static int unix_cli_line_process_one(unix_cli_main_t *cm, unix_main_t *um, unix_cli_file_t *cf, clib_file_t *uf, u8 input, unix_cli_parse_action_t action)
Process actionable input.
Definition: cli.c:1524
#define UNIX_FILE_DATA_AVAILABLE_TO_WRITE
Definition: file.h:57
Scroll to next page.
Definition: cli.c:310
static void vlib_node_set_state(vlib_main_t *vm, u32 node_index, vlib_node_state_t new_state)
Set node dispatch state.
Definition: node_funcs.h:148
u8 has_history
This session has command history.
Definition: cli.c:161
A CLI banner line.
Definition: cli.c:106
#define ANSI_CLEAR
ANSI clear screen.
Definition: cli.c:72
static clib_error_t * unix_cli_show_history(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
CLI command to show session command history.
Definition: cli.c:3509
int vlib_cli_input(vlib_main_t *vm, unformat_input_t *input, vlib_cli_output_function_t *function, uword function_arg)
Definition: cli.c:730
static void clib_socket_free(clib_socket_t *s)
Definition: socket.h:165
Pager line index.
Definition: cli.c:134
Action parser did not find any match.
Definition: cli.c:316
u8 started
Has the session started?
Definition: cli.c:196
struct _vlib_node_registration vlib_node_registration_t
clib_error_t * vlib_unix_recursive_mkdir(char *path)
Definition: util.c:103
Scroll to next line.
Definition: cli.c:306
clib_error_t * error
Definition: unix.h:50
CLI global state.
Definition: cli.c:472
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
#define ANSI_BRED
ANSI Start bright red text.
Definition: cli.c:82
u8 * search_key
The string being searched for in the history.
Definition: cli.c:176
u64 uword
Definition: types.h:112
static void unformat_free(unformat_input_t *i)
Definition: format.h:163
#define clib_unix_warning(format, args...)
Definition: error.h:68
u8 * format_time_interval(u8 *s, va_list *args)
Definition: std-formats.c:138
static uword unix_cli_process(vlib_main_t *vm, vlib_node_runtime_t *rt, vlib_frame_t *f)
Handle system events.
Definition: cli.c:2672
static void unix_cli_file_welcome(unix_cli_main_t *cm, unix_cli_file_t *cf)
Emit initial welcome banner and prompt on a connection.
Definition: cli.c:1220
static clib_error_t * unix_config(vlib_main_t *vm, unformat_input_t *input)
Definition: main.c:384
struct clib_bihash_value offset
template key/value backing page structure
static vlib_process_t * vlib_get_process_from_node(vlib_main_t *vm, vlib_node_t *node)
Definition: node_funcs.h:208
u8 * format_unformat_error(u8 *s, va_list *va)
Definition: unformat.c:91
void vlib_worker_thread_barrier_release(vlib_main_t *vm)
Definition: threads.c:1520
static void unix_cli_pager_prompt_erase(unix_cli_file_t *cf, clib_file_t *uf)
Erase the printed pager prompt.
Definition: cli.c:839
static void unix_cli_resize_interrupt(int signum)
The system terminal has informed us that the window size has changed.
Definition: cli.c:3012
Clear and redraw the page on the terminal.
Definition: cli.c:312
static int unix_cli_line_edit(unix_cli_main_t *cm, unix_main_t *um, clib_file_main_t *fm, unix_cli_file_t *cf)
Process input bytes on a stream to provide line editing and command history in the CLI...
Definition: cli.c:2433
static vlib_node_t * vlib_get_node(vlib_main_t *vm, u32 i)
Get vlib node by index.
Definition: node_funcs.h:59
#define vec_foreach(var, vec)
Vector iterator.
uword private_data
Definition: file.h:64
u8 cursor_direction
The current direction of cursor travel.
Definition: cli.c:242
u8 crlf_mode
Set if the CRLF mode wants CR + LF.
Definition: cli.c:190
static clib_error_t * unix_cli_exec(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
CLI command to execute a VPP command script.
Definition: cli.c:3301
Definition: file.h:51
#define ANSI_RESET
ANSI reset color settings.
Definition: cli.c:74
clib_longjmp_t main_loop_exit
Definition: main.h:130
vlib_cli_output_function_t * output_function
Definition: node.h:611
static uword unix_cli_new_session_process(vlib_main_t *vm, vlib_node_runtime_t *rt, vlib_frame_t *f)
A failsafe manager that ensures CLI sessions issue an initial prompt if TELNET negotiation fails...
Definition: cli.c:1271
u32 clib_file_index
The file index held by unix.c.
Definition: cli.c:151
static unix_cli_main_t unix_cli_main
CLI global state.
Definition: cli.c:497
#define CLIB_SOCKET_F_ALLOW_GROUP_WRITE
Definition: socket.h:62
i32 excursion
How far from the end of the history array the user has browsed.
Definition: cli.c:167
void vlib_start_process(vlib_main_t *vm, uword process_index)
Definition: main.c:1587
Search the pager buffer.
Definition: cli.c:313
u8 line_mode
Line mode or char mode.
Definition: cli.c:187
u32 length
The length of the line without terminating NUL.
Definition: cli.c:109
void vlib_cli_output(vlib_main_t *vm, char *fmt,...)
Definition: cli.c:772
f64 deadline
Deadline after which the new session must have a prompt.
Definition: cli.c:468
Left arrow.
Definition: cli.c:288
u32 stdin_cli_file_index
The session index of the stdin cli.
Definition: cli.c:484
static void unix_cli_add_pending_output(clib_file_t *uf, unix_cli_file_t *cf, u8 *buffer, uword buffer_bytes)
Add bytes to the output vector and then flagg the I/O system that bytes are available to be sent...
Definition: cli.c:561
static clib_error_t * unix_cli_show_cli_sessions(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
CLI command to display a list of CLI sessions.
Definition: cli.c:3618
static void unix_cli_pager_add_line(unix_cli_file_t *cf, u8 *line, word len_or_index)
Process and add a line to the pager index.
Definition: cli.c:938
#define clib_panic(format, args...)
Definition: error.h:72
#define UNIX_CLI_MAX_TERMINAL_HEIGHT
Maximum terminal height we will accept.
Definition: cli.c:99
uword unformat(unformat_input_t *i, const char *fmt,...)
Definition: unformat.c:978
Each new session is stored on a list with a deadline after which a prompt is issued, in case the session TELNET negotiation fails to complete.
Definition: cli.c:465
Scroll to previous line.
Definition: cli.c:307
u64 n_total_errors
Definition: unix.h:69
static uword unformat_check_input(unformat_input_t *i)
Definition: format.h:171
u32 height
Terminal height.
Definition: cli.c:226
static clib_error_t * unix_cli_exit(vlib_main_t *vm)
Called when VPP is shutting down, this restores the system terminal state if previously saved...
Definition: cli.c:3207
static void unix_cli_process_input(unix_cli_main_t *cm, uword cli_file_index)
Process input to a CLI session.
Definition: cli.c:2522
static unix_cli_parse_actions_t unix_cli_parse_strings[]
Patterns to match on a CLI input stream.
Definition: cli.c:346