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726f6388 JA |
1 | /* bashhist.c -- bash interface to the GNU history library. */ |
2 | ||
a0c0a00f | 3 | /* Copyright (C) 1993-2015 Free Software Foundation, Inc. |
726f6388 JA |
4 | |
5 | This file is part of GNU Bash, the Bourne Again SHell. | |
6 | ||
3185942a JA |
7 | Bash is free software: you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation, either version 3 of the License, or | |
10 | (at your option) any later version. | |
726f6388 | 11 | |
3185942a JA |
12 | Bash is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
726f6388 | 16 | |
3185942a JA |
17 | You should have received a copy of the GNU General Public License |
18 | along with Bash. If not, see <http://www.gnu.org/licenses/>. | |
19 | */ | |
726f6388 | 20 | |
ccc6cda3 JA |
21 | #include "config.h" |
22 | ||
23 | #if defined (HISTORY) | |
24 | ||
25 | #if defined (HAVE_UNISTD_H) | |
cce855bc | 26 | # ifdef _MINIX |
ac50fbac | 27 | # include <sys/types.h> |
cce855bc | 28 | # endif |
ccc6cda3 JA |
29 | # include <unistd.h> |
30 | #endif | |
31 | ||
32 | #include "bashtypes.h" | |
726f6388 JA |
33 | #include <stdio.h> |
34 | #include <errno.h> | |
35 | #include "bashansi.h" | |
36 | #include "posixstat.h" | |
37 | #include "filecntl.h" | |
d166f048 | 38 | |
b80f6443 JA |
39 | #include "bashintl.h" |
40 | ||
0001803f CR |
41 | #if defined (SYSLOG_HISTORY) |
42 | # include <syslog.h> | |
43 | #endif | |
44 | ||
726f6388 JA |
45 | #include "shell.h" |
46 | #include "flags.h" | |
ccc6cda3 JA |
47 | #include "input.h" |
48 | #include "parser.h" /* for the struct dstack stuff. */ | |
49 | #include "pathexp.h" /* for the struct ignorevar stuff */ | |
f73dda09 | 50 | #include "bashhist.h" /* matching prototypes and declarations */ |
ccc6cda3 | 51 | #include "builtins/common.h" |
d166f048 | 52 | |
726f6388 | 53 | #include <readline/history.h> |
f73dda09 JA |
54 | #include <glob/glob.h> |
55 | #include <glob/strmatch.h> | |
ccc6cda3 JA |
56 | |
57 | #if defined (READLINE) | |
58 | # include "bashline.h" | |
b80f6443 | 59 | extern int rl_done, rl_dispatching; /* should really include readline.h */ |
ccc6cda3 JA |
60 | #endif |
61 | ||
62 | #if !defined (errno) | |
63 | extern int errno; | |
64 | #endif | |
65 | ||
f73dda09 | 66 | static int histignore_item_func __P((struct ign *)); |
7117c2d2 | 67 | static int check_history_control __P((char *)); |
b80f6443 | 68 | static void hc_erasedups __P((char *)); |
7117c2d2 | 69 | static void really_add_history __P((char *)); |
ccc6cda3 JA |
70 | |
71 | static struct ignorevar histignore = | |
72 | { | |
73 | "HISTIGNORE", | |
74 | (struct ign *)0, | |
75 | 0, | |
76 | (char *)0, | |
f73dda09 | 77 | (sh_iv_item_func_t *)histignore_item_func, |
ccc6cda3 JA |
78 | }; |
79 | ||
80 | #define HIGN_EXPAND 0x01 | |
726f6388 JA |
81 | |
82 | /* Declarations of bash history variables. */ | |
83 | /* Non-zero means to remember lines typed to the shell on the history | |
84 | list. This is different than the user-controlled behaviour; this | |
85 | becomes zero when we read lines from a file, for example. */ | |
a0c0a00f CR |
86 | int remember_on_history = 0; |
87 | int enable_history_list = 0; /* value for `set -o history' */ | |
726f6388 | 88 | |
b80f6443 JA |
89 | /* The number of lines that Bash has added to this history session. The |
90 | difference between the number of the top element in the history list | |
91 | (offset from history_base) and the number of lines in the history file. | |
92 | Appending this session's history to the history file resets this to 0. */ | |
ccc6cda3 | 93 | int history_lines_this_session; |
726f6388 JA |
94 | |
95 | /* The number of lines that Bash has read from the history file. */ | |
ccc6cda3 | 96 | int history_lines_in_file; |
726f6388 | 97 | |
ccc6cda3 | 98 | #if defined (BANG_HISTORY) |
726f6388 JA |
99 | /* Non-zero means do no history expansion on this line, regardless |
100 | of what history_expansion says. */ | |
ccc6cda3 | 101 | int history_expansion_inhibited; |
a0c0a00f CR |
102 | /* If non-zero, double quotes can quote the history expansion character. */ |
103 | int double_quotes_inhibit_history_expansion = 0; | |
ccc6cda3 | 104 | #endif |
726f6388 | 105 | |
7117c2d2 JA |
106 | /* With the old default, every line was saved in the history individually. |
107 | I.e., if the user enters: | |
726f6388 | 108 | bash$ for i in a b c |
ccc6cda3 JA |
109 | > do |
110 | > echo $i | |
111 | > done | |
726f6388 JA |
112 | Each line will be individually saved in the history. |
113 | bash$ history | |
114 | 10 for i in a b c | |
ccc6cda3 JA |
115 | 11 do |
116 | 12 echo $i | |
117 | 13 done | |
118 | 14 history | |
726f6388 JA |
119 | If the variable command_oriented_history is set, multiple lines |
120 | which form one command will be saved as one history entry. | |
121 | bash$ for i in a b c | |
ccc6cda3 JA |
122 | > do |
123 | > echo $i | |
124 | > done | |
125 | bash$ history | |
726f6388 JA |
126 | 10 for i in a b c |
127 | do | |
128 | echo $i | |
129 | done | |
ccc6cda3 | 130 | 11 history |
726f6388 JA |
131 | The user can then recall the whole command all at once instead |
132 | of just being able to recall one line at a time. | |
7117c2d2 JA |
133 | |
134 | This is now enabled by default. | |
726f6388 | 135 | */ |
ccc6cda3 JA |
136 | int command_oriented_history = 1; |
137 | ||
7117c2d2 JA |
138 | /* Set to 1 if the first line of a possibly-multi-line command was saved |
139 | in the history list. Managed by maybe_add_history(), but global so | |
140 | the history-manipluating builtins can see it. */ | |
141 | int current_command_first_line_saved = 0; | |
142 | ||
ccc6cda3 JA |
143 | /* Non-zero means to store newlines in the history list when using |
144 | command_oriented_history rather than trying to use semicolons. */ | |
145 | int literal_history; | |
146 | ||
147 | /* Non-zero means to append the history to the history file at shell | |
148 | exit, even if the history has been stifled. */ | |
149 | int force_append_history; | |
726f6388 | 150 | |
b80f6443 JA |
151 | /* A nit for picking at history saving. Flags have the following values: |
152 | ||
153 | Value == 0 means save all lines parsed by the shell on the history. | |
154 | Value & HC_IGNSPACE means save all lines that do not start with a space. | |
155 | Value & HC_IGNDUPS means save all lines that do not match the last | |
156 | line saved. | |
157 | Value & HC_ERASEDUPS means to remove all other matching lines from the | |
158 | history list before saving the latest line. */ | |
ccc6cda3 JA |
159 | int history_control; |
160 | ||
d166f048 JA |
161 | /* Set to 1 if the last command was added to the history list successfully |
162 | as a separate history entry; set to 0 if the line was ignored or added | |
163 | to a previous entry as part of command-oriented-history processing. */ | |
164 | int hist_last_line_added; | |
165 | ||
95732b49 JA |
166 | /* Set to 1 if builtins/history.def:push_history added the last history |
167 | entry. */ | |
168 | int hist_last_line_pushed; | |
169 | ||
ccc6cda3 JA |
170 | #if defined (READLINE) |
171 | /* If non-zero, and readline is being used, the user is offered the | |
172 | chance to re-edit a failed history expansion. */ | |
173 | int history_reediting; | |
174 | ||
175 | /* If non-zero, and readline is being used, don't directly execute a | |
176 | line with history substitution. Reload it into the editing buffer | |
177 | instead and let the user further edit and confirm with a newline. */ | |
178 | int hist_verify; | |
d166f048 JA |
179 | |
180 | #endif /* READLINE */ | |
726f6388 | 181 | |
f73dda09 JA |
182 | /* Non-zero means to not save function definitions in the history list. */ |
183 | int dont_save_function_defs; | |
184 | ||
726f6388 | 185 | /* Variables declared in other files used here. */ |
726f6388 | 186 | extern int current_command_line_count; |
726f6388 | 187 | |
ccc6cda3 | 188 | extern struct dstack dstack; |
495aee44 | 189 | extern int parser_state; |
ccc6cda3 | 190 | |
a0c0a00f | 191 | #if defined (BANG_HISTORY) |
f73dda09 | 192 | static int bash_history_inhibit_expansion __P((char *, int)); |
a0c0a00f | 193 | #endif |
f73dda09 JA |
194 | #if defined (READLINE) |
195 | static void re_edit __P((char *)); | |
196 | #endif | |
197 | static int history_expansion_p __P((char *)); | |
198 | static int shell_comment __P((char *)); | |
199 | static int should_expand __P((char *)); | |
200 | static HIST_ENTRY *last_history_entry __P((void)); | |
201 | static char *expand_histignore_pattern __P((char *)); | |
202 | static int history_should_ignore __P((char *)); | |
ccc6cda3 | 203 | |
a0c0a00f | 204 | #if defined (BANG_HISTORY) |
d166f048 JA |
205 | /* Is the history expansion starting at string[i] one that should not |
206 | be expanded? */ | |
207 | static int | |
208 | bash_history_inhibit_expansion (string, i) | |
209 | char *string; | |
210 | int i; | |
211 | { | |
a0c0a00f CR |
212 | int t; |
213 | char hx[2]; | |
214 | ||
215 | hx[0] = history_expansion_char; | |
216 | hx[1] = '\0'; | |
217 | ||
d166f048 JA |
218 | /* The shell uses ! as a pattern negation character in globbing [...] |
219 | expressions, so let those pass without expansion. */ | |
220 | if (i > 0 && (string[i - 1] == '[') && member (']', string + i + 1)) | |
221 | return (1); | |
222 | /* The shell uses ! as the indirect expansion character, so let those | |
223 | expansions pass as well. */ | |
224 | else if (i > 1 && string[i - 1] == '{' && string[i - 2] == '$' && | |
225 | member ('}', string + i + 1)) | |
226 | return (1); | |
495aee44 CR |
227 | /* The shell uses $! as a defined parameter expansion. */ |
228 | else if (i > 1 && string[i - 1] == '$' && string[i] == '!') | |
229 | return (1); | |
cce855bc JA |
230 | #if defined (EXTENDED_GLOB) |
231 | else if (extended_glob && i > 1 && string[i+1] == '(' && member (')', string + i + 2)) | |
232 | return (1); | |
233 | #endif | |
a0c0a00f CR |
234 | |
235 | /* Make sure the history expansion should not be skipped by quoting or | |
236 | command/process substitution. */ | |
237 | else if ((t = skip_to_histexp (string, 0, hx, SD_NOJMP|SD_HISTEXP)) > 0) | |
238 | { | |
239 | /* Skip instances of history expansion appearing on the line before | |
240 | this one. */ | |
241 | while (t < i) | |
242 | { | |
243 | t = skip_to_histexp (string, t+1, hx, SD_NOJMP|SD_HISTEXP); | |
244 | if (t <= 0) | |
245 | return 0; | |
246 | } | |
247 | return (t > i); | |
248 | } | |
d166f048 JA |
249 | else |
250 | return (0); | |
251 | } | |
a0c0a00f | 252 | #endif |
d166f048 | 253 | |
ccc6cda3 JA |
254 | void |
255 | bash_initialize_history () | |
256 | { | |
257 | history_quotes_inhibit_expansion = 1; | |
258 | history_search_delimiter_chars = ";&()|<>"; | |
95732b49 | 259 | #if defined (BANG_HISTORY) |
a0c0a00f | 260 | history_inhibit_expansion_function = bash_history_inhibit_expansion; |
b80f6443 | 261 | sv_histchars ("histchars"); |
95732b49 | 262 | #endif |
ccc6cda3 JA |
263 | } |
264 | ||
265 | void | |
266 | bash_history_reinit (interact) | |
267 | int interact; | |
268 | { | |
269 | #if defined (BANG_HISTORY) | |
270 | history_expansion = interact != 0; | |
a0c0a00f | 271 | history_expansion_inhibited = 1; /* XXX */ |
d166f048 | 272 | history_inhibit_expansion_function = bash_history_inhibit_expansion; |
a0c0a00f CR |
273 | #endif |
274 | remember_on_history = enable_history_list; | |
ccc6cda3 JA |
275 | } |
276 | ||
277 | void | |
278 | bash_history_disable () | |
279 | { | |
280 | remember_on_history = 0; | |
281 | #if defined (BANG_HISTORY) | |
282 | history_expansion_inhibited = 1; | |
283 | #endif | |
284 | } | |
285 | ||
286 | void | |
287 | bash_history_enable () | |
288 | { | |
a0c0a00f | 289 | remember_on_history = enable_history_list = 1; |
ccc6cda3 JA |
290 | #if defined (BANG_HISTORY) |
291 | history_expansion_inhibited = 0; | |
d166f048 | 292 | history_inhibit_expansion_function = bash_history_inhibit_expansion; |
a0c0a00f | 293 | #endif |
ccc6cda3 JA |
294 | sv_history_control ("HISTCONTROL"); |
295 | sv_histignore ("HISTIGNORE"); | |
296 | } | |
726f6388 JA |
297 | |
298 | /* Load the history list from the history file. */ | |
299 | void | |
300 | load_history () | |
301 | { | |
302 | char *hf; | |
303 | ||
304 | /* Truncate history file for interactive shells which desire it. | |
305 | Note that the history file is automatically truncated to the | |
306 | size of HISTSIZE if the user does not explicitly set the size | |
307 | differently. */ | |
0628567a JA |
308 | set_if_not ("HISTSIZE", "500"); |
309 | sv_histsize ("HISTSIZE"); | |
310 | ||
726f6388 | 311 | set_if_not ("HISTFILESIZE", get_string_value ("HISTSIZE")); |
ccc6cda3 | 312 | sv_histsize ("HISTFILESIZE"); |
726f6388 JA |
313 | |
314 | /* Read the history in HISTFILE into the history list. */ | |
315 | hf = get_string_value ("HISTFILE"); | |
316 | ||
3185942a | 317 | if (hf && *hf && file_exists (hf)) |
726f6388 | 318 | { |
ccc6cda3 | 319 | read_history (hf); |
a0c0a00f CR |
320 | /* We have read all of the lines from the history file, even if we |
321 | read more lines than $HISTSIZE. Remember the total number of lines | |
322 | we read so we don't count the last N lines as new over and over | |
323 | again. */ | |
324 | history_lines_in_file = history_lines_read_from_file; | |
ccc6cda3 | 325 | using_history (); |
a0c0a00f | 326 | /* history_lines_in_file = where_history () + history_base - 1; */ |
726f6388 JA |
327 | } |
328 | } | |
329 | ||
3185942a JA |
330 | void |
331 | bash_clear_history () | |
332 | { | |
333 | clear_history (); | |
334 | history_lines_this_session = 0; | |
a0c0a00f | 335 | /* XXX - reset history_lines_read_from_file? */ |
3185942a JA |
336 | } |
337 | ||
338 | /* Delete and free the history list entry at offset I. */ | |
339 | int | |
340 | bash_delete_histent (i) | |
341 | int i; | |
342 | { | |
343 | HIST_ENTRY *discard; | |
344 | ||
345 | discard = remove_history (i); | |
346 | if (discard) | |
347 | free_history_entry (discard); | |
348 | history_lines_this_session--; | |
349 | ||
350 | return 1; | |
351 | } | |
352 | ||
353 | int | |
354 | bash_delete_last_history () | |
355 | { | |
356 | register int i; | |
357 | HIST_ENTRY **hlist, *histent; | |
358 | int r; | |
359 | ||
360 | hlist = history_list (); | |
361 | if (hlist == NULL) | |
362 | return 0; | |
363 | ||
364 | for (i = 0; hlist[i]; i++) | |
365 | ; | |
366 | i--; | |
367 | ||
368 | /* History_get () takes a parameter that must be offset by history_base. */ | |
369 | histent = history_get (history_base + i); /* Don't free this */ | |
370 | if (histent == NULL) | |
371 | return 0; | |
372 | ||
373 | r = bash_delete_histent (i); | |
374 | ||
375 | if (where_history () > history_length) | |
376 | history_set_pos (history_length); | |
377 | ||
378 | return r; | |
379 | } | |
380 | ||
d166f048 | 381 | #ifdef INCLUDE_UNUSED |
726f6388 JA |
382 | /* Write the existing history out to the history file. */ |
383 | void | |
384 | save_history () | |
385 | { | |
ccc6cda3 | 386 | char *hf; |
ac50fbac | 387 | int r; |
726f6388 | 388 | |
ccc6cda3 | 389 | hf = get_string_value ("HISTFILE"); |
3185942a | 390 | if (hf && *hf && file_exists (hf)) |
726f6388 | 391 | { |
ccc6cda3 JA |
392 | /* Append only the lines that occurred this session to |
393 | the history file. */ | |
394 | using_history (); | |
726f6388 | 395 | |
495aee44 | 396 | if (history_lines_this_session <= where_history () || force_append_history) |
ac50fbac | 397 | r = append_history (history_lines_this_session, hf); |
ccc6cda3 | 398 | else |
ac50fbac | 399 | r = write_history (hf); |
ccc6cda3 JA |
400 | sv_histsize ("HISTFILESIZE"); |
401 | } | |
402 | } | |
d166f048 | 403 | #endif |
ccc6cda3 JA |
404 | |
405 | int | |
406 | maybe_append_history (filename) | |
407 | char *filename; | |
408 | { | |
409 | int fd, result; | |
410 | struct stat buf; | |
411 | ||
412 | result = EXECUTION_SUCCESS; | |
a0c0a00f | 413 | if (history_lines_this_session > 0 && (history_lines_this_session <= where_history ())) |
ccc6cda3 JA |
414 | { |
415 | /* If the filename was supplied, then create it if necessary. */ | |
416 | if (stat (filename, &buf) == -1 && errno == ENOENT) | |
417 | { | |
b72432fd | 418 | fd = open (filename, O_WRONLY|O_CREAT, 0600); |
ccc6cda3 JA |
419 | if (fd < 0) |
420 | { | |
b80f6443 | 421 | builtin_error (_("%s: cannot create: %s"), filename, strerror (errno)); |
ccc6cda3 JA |
422 | return (EXECUTION_FAILURE); |
423 | } | |
424 | close (fd); | |
726f6388 | 425 | } |
ccc6cda3 | 426 | result = append_history (history_lines_this_session, filename); |
a0c0a00f CR |
427 | /* Pretend we already read these lines from the file because we just |
428 | added them */ | |
ccc6cda3 JA |
429 | history_lines_in_file += history_lines_this_session; |
430 | history_lines_this_session = 0; | |
726f6388 | 431 | } |
a0c0a00f CR |
432 | else |
433 | history_lines_this_session = 0; /* reset if > where_history() */ | |
434 | ||
ccc6cda3 | 435 | return (result); |
726f6388 JA |
436 | } |
437 | ||
438 | /* If this is an interactive shell, then append the lines executed | |
439 | this session to the history file. */ | |
440 | int | |
441 | maybe_save_shell_history () | |
442 | { | |
ccc6cda3 JA |
443 | int result; |
444 | char *hf; | |
726f6388 | 445 | |
ccc6cda3 | 446 | result = 0; |
a0c0a00f | 447 | if (history_lines_this_session > 0) |
726f6388 | 448 | { |
ccc6cda3 | 449 | hf = get_string_value ("HISTFILE"); |
726f6388 JA |
450 | |
451 | if (hf && *hf) | |
452 | { | |
726f6388 | 453 | /* If the file doesn't exist, then create it. */ |
3185942a | 454 | if (file_exists (hf) == 0) |
726f6388 | 455 | { |
ccc6cda3 | 456 | int file; |
b72432fd | 457 | file = open (hf, O_CREAT | O_TRUNC | O_WRONLY, 0600); |
726f6388 JA |
458 | if (file != -1) |
459 | close (file); | |
460 | } | |
461 | ||
462 | /* Now actually append the lines if the history hasn't been | |
463 | stifled. If the history has been stifled, rewrite the | |
464 | history file. */ | |
465 | using_history (); | |
ccc6cda3 | 466 | if (history_lines_this_session <= where_history () || force_append_history) |
726f6388 JA |
467 | { |
468 | result = append_history (history_lines_this_session, hf); | |
469 | history_lines_in_file += history_lines_this_session; | |
470 | } | |
471 | else | |
472 | { | |
473 | result = write_history (hf); | |
a0c0a00f CR |
474 | history_lines_in_file = history_lines_written_to_file; |
475 | /* history_lines_in_file = where_history () + history_base - 1; */ | |
726f6388 JA |
476 | } |
477 | history_lines_this_session = 0; | |
ccc6cda3 JA |
478 | |
479 | sv_histsize ("HISTFILESIZE"); | |
726f6388 JA |
480 | } |
481 | } | |
482 | return (result); | |
483 | } | |
484 | ||
ccc6cda3 | 485 | #if defined (READLINE) |
726f6388 JA |
486 | /* Tell readline () that we have some text for it to edit. */ |
487 | static void | |
488 | re_edit (text) | |
489 | char *text; | |
490 | { | |
ccc6cda3 | 491 | if (bash_input.type == st_stdin) |
726f6388 | 492 | bash_re_edit (text); |
ccc6cda3 | 493 | } |
726f6388 | 494 | #endif /* READLINE */ |
ccc6cda3 JA |
495 | |
496 | /* Return 1 if this line needs history expansion. */ | |
497 | static int | |
498 | history_expansion_p (line) | |
499 | char *line; | |
500 | { | |
501 | register char *s; | |
502 | ||
503 | for (s = line; *s; s++) | |
504 | if (*s == history_expansion_char || *s == history_subst_char) | |
505 | return 1; | |
506 | return 0; | |
726f6388 | 507 | } |
726f6388 JA |
508 | |
509 | /* Do pre-processing on LINE. If PRINT_CHANGES is non-zero, then | |
510 | print the results of expanding the line if there were any changes. | |
511 | If there is an error, return NULL, otherwise the expanded line is | |
512 | returned. If ADDIT is non-zero the line is added to the history | |
513 | list after history expansion. ADDIT is just a suggestion; | |
514 | REMEMBER_ON_HISTORY can veto, and does. | |
515 | Right now this does history expansion. */ | |
516 | char * | |
517 | pre_process_line (line, print_changes, addit) | |
518 | char *line; | |
519 | int print_changes, addit; | |
520 | { | |
521 | char *history_value; | |
522 | char *return_value; | |
ccc6cda3 | 523 | int expanded; |
726f6388 JA |
524 | |
525 | return_value = line; | |
ccc6cda3 | 526 | expanded = 0; |
726f6388 JA |
527 | |
528 | # if defined (BANG_HISTORY) | |
529 | /* History expand the line. If this results in no errors, then | |
530 | add that line to the history if ADDIT is non-zero. */ | |
ccc6cda3 | 531 | if (!history_expansion_inhibited && history_expansion && history_expansion_p (line)) |
726f6388 JA |
532 | { |
533 | expanded = history_expand (line, &history_value); | |
534 | ||
535 | if (expanded) | |
536 | { | |
537 | if (print_changes) | |
538 | { | |
539 | if (expanded < 0) | |
cce855bc | 540 | internal_error ("%s", history_value); |
d166f048 | 541 | #if defined (READLINE) |
bb70624e | 542 | else if (hist_verify == 0 || expanded == 2) |
d166f048 JA |
543 | #else |
544 | else | |
545 | #endif | |
726f6388 JA |
546 | fprintf (stderr, "%s\n", history_value); |
547 | } | |
548 | ||
549 | /* If there was an error, return NULL. */ | |
550 | if (expanded < 0 || expanded == 2) /* 2 == print only */ | |
551 | { | |
b80f6443 JA |
552 | # if defined (READLINE) |
553 | if (expanded == 2 && rl_dispatching == 0 && *history_value) | |
554 | # else | |
555 | if (expanded == 2 && *history_value) | |
556 | # endif /* !READLINE */ | |
557 | maybe_add_history (history_value); | |
558 | ||
726f6388 JA |
559 | free (history_value); |
560 | ||
ccc6cda3 | 561 | # if defined (READLINE) |
726f6388 JA |
562 | /* New hack. We can allow the user to edit the |
563 | failed history expansion. */ | |
b80f6443 | 564 | if (history_reediting && expanded < 0 && rl_done) |
ccc6cda3 JA |
565 | re_edit (line); |
566 | # endif /* READLINE */ | |
567 | return ((char *)NULL); | |
568 | } | |
569 | ||
570 | # if defined (READLINE) | |
571 | if (hist_verify && expanded == 1) | |
572 | { | |
573 | re_edit (history_value); | |
a0c0a00f | 574 | free (history_value); |
726f6388 JA |
575 | return ((char *)NULL); |
576 | } | |
ccc6cda3 | 577 | # endif |
726f6388 JA |
578 | } |
579 | ||
580 | /* Let other expansions know that return_value can be free'ed, | |
581 | and that a line has been added to the history list. Note | |
582 | that we only add lines that have something in them. */ | |
583 | expanded = 1; | |
584 | return_value = history_value; | |
585 | } | |
586 | # endif /* BANG_HISTORY */ | |
587 | ||
588 | if (addit && remember_on_history && *return_value) | |
589 | maybe_add_history (return_value); | |
590 | ||
d166f048 | 591 | #if 0 |
ccc6cda3 | 592 | if (expanded == 0) |
726f6388 | 593 | return_value = savestring (line); |
d166f048 | 594 | #endif |
726f6388 JA |
595 | |
596 | return (return_value); | |
597 | } | |
598 | ||
bb70624e JA |
599 | /* Return 1 if the first non-whitespace character in LINE is a `#', indicating |
600 | * that the line is a shell comment. */ | |
601 | static int | |
602 | shell_comment (line) | |
603 | char *line; | |
604 | { | |
605 | char *p; | |
606 | ||
607 | for (p = line; p && *p && whitespace (*p); p++) | |
608 | ; | |
609 | return (p && *p == '#'); | |
610 | } | |
611 | ||
f73dda09 | 612 | #ifdef INCLUDE_UNUSED |
bb70624e JA |
613 | /* Remove shell comments from LINE. A `#' and anything after it is a comment. |
614 | This isn't really useful yet, since it doesn't handle quoting. */ | |
615 | static char * | |
616 | filter_comments (line) | |
617 | char *line; | |
618 | { | |
619 | char *p; | |
620 | ||
621 | for (p = line; p && *p && *p != '#'; p++) | |
622 | ; | |
623 | if (p && *p == '#') | |
624 | *p = '\0'; | |
625 | return (line); | |
626 | } | |
f73dda09 | 627 | #endif |
bb70624e | 628 | |
7117c2d2 JA |
629 | /* Check LINE against what HISTCONTROL says to do. Returns 1 if the line |
630 | should be saved; 0 if it should be discarded. */ | |
631 | static int | |
632 | check_history_control (line) | |
726f6388 JA |
633 | char *line; |
634 | { | |
ccc6cda3 | 635 | HIST_ENTRY *temp; |
7117c2d2 | 636 | int r; |
ccc6cda3 | 637 | |
b80f6443 JA |
638 | if (history_control == 0) |
639 | return 1; | |
640 | ||
641 | /* ignorespace or ignoreboth */ | |
642 | if ((history_control & HC_IGNSPACE) && *line == ' ') | |
643 | return 0; | |
644 | ||
645 | /* ignoredups or ignoreboth */ | |
646 | if (history_control & HC_IGNDUPS) | |
7117c2d2 | 647 | { |
7117c2d2 JA |
648 | using_history (); |
649 | temp = previous_history (); | |
650 | ||
651 | r = (temp == 0 || STREQ (temp->line, line) == 0); | |
652 | ||
653 | using_history (); | |
b80f6443 JA |
654 | |
655 | if (r == 0) | |
656 | return r; | |
7117c2d2 JA |
657 | } |
658 | ||
b80f6443 JA |
659 | return 1; |
660 | } | |
661 | ||
662 | /* Remove all entries matching LINE from the history list. Triggered when | |
663 | HISTCONTROL includes `erasedups'. */ | |
664 | static void | |
665 | hc_erasedups (line) | |
666 | char *line; | |
667 | { | |
668 | HIST_ENTRY *temp; | |
669 | int r; | |
670 | ||
671 | using_history (); | |
672 | while (temp = previous_history ()) | |
673 | { | |
674 | if (STREQ (temp->line, line)) | |
675 | { | |
676 | r = where_history (); | |
a0c0a00f CR |
677 | temp = remove_history (r); |
678 | if (temp) | |
679 | free_history_entry (temp); | |
b80f6443 JA |
680 | } |
681 | } | |
682 | using_history (); | |
7117c2d2 JA |
683 | } |
684 | ||
685 | /* Add LINE to the history list, handling possibly multi-line compound | |
686 | commands. We note whether or not we save the first line of each command | |
687 | (which is usually the entire command and history entry), and don't add | |
688 | the second and subsequent lines of a multi-line compound command if we | |
689 | didn't save the first line. We don't usually save shell comment lines in | |
690 | compound commands in the history, because they could have the effect of | |
691 | commenting out the rest of the command when the entire command is saved as | |
692 | a single history entry (when COMMAND_ORIENTED_HISTORY is enabled). If | |
693 | LITERAL_HISTORY is set, we're saving lines in the history with embedded | |
ac50fbac CR |
694 | newlines, so it's OK to save comment lines. If we're collecting the body |
695 | of a here-document, we should act as if literal_history is enabled, because | |
696 | we want to save the entire contents of the here-document as it was | |
697 | entered. We also make sure to save multiple-line quoted strings or other | |
698 | constructs. */ | |
7117c2d2 JA |
699 | void |
700 | maybe_add_history (line) | |
701 | char *line; | |
702 | { | |
28ef6c31 | 703 | hist_last_line_added = 0; |
726f6388 JA |
704 | |
705 | /* Don't use the value of history_control to affect the second | |
cce855bc JA |
706 | and subsequent lines of a multi-line command (old code did |
707 | this only when command_oriented_history is enabled). */ | |
cce855bc | 708 | if (current_command_line_count > 1) |
ccc6cda3 | 709 | { |
7117c2d2 | 710 | if (current_command_first_line_saved && |
ac50fbac | 711 | ((parser_state & PST_HEREDOC) || literal_history || dstack.delimiter_depth != 0 || shell_comment (line) == 0)) |
bb70624e | 712 | bash_add_history (line); |
ccc6cda3 JA |
713 | return; |
714 | } | |
726f6388 | 715 | |
28ef6c31 JA |
716 | /* This is the first line of a (possible multi-line) command. Note whether |
717 | or not we should save the first line and remember it. */ | |
7117c2d2 JA |
718 | current_command_first_line_saved = check_add_history (line, 0); |
719 | } | |
28ef6c31 | 720 | |
7117c2d2 JA |
721 | /* Just check LINE against HISTCONTROL and HISTIGNORE and add it to the |
722 | history if it's OK. Used by `history -s' as well as maybe_add_history(). | |
723 | Returns 1 if the line was saved in the history, 0 otherwise. */ | |
724 | int | |
725 | check_add_history (line, force) | |
726 | char *line; | |
727 | int force; | |
728 | { | |
729 | if (check_history_control (line) && history_should_ignore (line) == 0) | |
726f6388 | 730 | { |
b80f6443 JA |
731 | /* We're committed to saving the line. If the user has requested it, |
732 | remove other matching lines from the history. */ | |
733 | if (history_control & HC_ERASEDUPS) | |
734 | hc_erasedups (line); | |
735 | ||
7117c2d2 JA |
736 | if (force) |
737 | { | |
738 | really_add_history (line); | |
739 | using_history (); | |
740 | } | |
741 | else | |
742 | bash_add_history (line); | |
743 | return 1; | |
726f6388 | 744 | } |
7117c2d2 | 745 | return 0; |
726f6388 JA |
746 | } |
747 | ||
0001803f CR |
748 | #if defined (SYSLOG_HISTORY) |
749 | #define SYSLOG_MAXLEN 600 | |
750 | ||
a0c0a00f CR |
751 | extern char *shell_name; |
752 | ||
753 | #ifndef OPENLOG_OPTS | |
754 | #define OPENLOG_OPTS 0 | |
755 | #endif | |
756 | ||
0001803f CR |
757 | void |
758 | bash_syslog_history (line) | |
759 | const char *line; | |
760 | { | |
761 | char trunc[SYSLOG_MAXLEN]; | |
a0c0a00f CR |
762 | static int first = 1; |
763 | ||
764 | if (first) | |
765 | { | |
766 | openlog (shell_name, OPENLOG_OPTS, SYSLOG_FACILITY); | |
767 | first = 0; | |
768 | } | |
0001803f CR |
769 | |
770 | if (strlen(line) < SYSLOG_MAXLEN) | |
771 | syslog (SYSLOG_FACILITY|SYSLOG_LEVEL, "HISTORY: PID=%d UID=%d %s", getpid(), current_user.uid, line); | |
772 | else | |
773 | { | |
774 | strncpy (trunc, line, SYSLOG_MAXLEN); | |
775 | trunc[SYSLOG_MAXLEN - 1] = '\0'; | |
776 | syslog (SYSLOG_FACILITY|SYSLOG_LEVEL, "HISTORY (TRUNCATED): PID=%d UID=%d %s", getpid(), current_user.uid, trunc); | |
777 | } | |
778 | } | |
779 | #endif | |
780 | ||
726f6388 JA |
781 | /* Add a line to the history list. |
782 | The variable COMMAND_ORIENTED_HISTORY controls the style of history | |
783 | remembering; when non-zero, and LINE is not the first line of a | |
784 | complete parser construct, append LINE to the last history line instead | |
785 | of adding it as a new line. */ | |
d166f048 | 786 | void |
726f6388 JA |
787 | bash_add_history (line) |
788 | char *line; | |
789 | { | |
ccc6cda3 JA |
790 | int add_it, offset, curlen; |
791 | HIST_ENTRY *current, *old; | |
792 | char *chars_to_add, *new_line; | |
726f6388 | 793 | |
ccc6cda3 | 794 | add_it = 1; |
726f6388 JA |
795 | if (command_oriented_history && current_command_line_count > 1) |
796 | { | |
ac50fbac CR |
797 | /* The second and subsequent lines of a here document have the trailing |
798 | newline preserved. We don't want to add extra newlines here, but we | |
799 | do want to add one after the first line (which is the command that | |
800 | contains the here-doc specifier). parse.y:history_delimiting_chars() | |
801 | does the right thing to take care of this for us. We don't want to | |
802 | add extra newlines if the user chooses to enable literal_history, | |
803 | so we have to duplicate some of what that function does here. */ | |
804 | if ((parser_state & PST_HEREDOC) && literal_history && current_command_line_count > 2 && line[strlen (line) - 1] == '\n') | |
805 | chars_to_add = ""; | |
806 | else | |
807 | chars_to_add = literal_history ? "\n" : history_delimiting_chars (line); | |
726f6388 JA |
808 | |
809 | using_history (); | |
726f6388 JA |
810 | current = previous_history (); |
811 | ||
812 | if (current) | |
813 | { | |
814 | /* If the previous line ended with an escaped newline (escaped | |
815 | with backslash, but otherwise unquoted), then remove the quoted | |
816 | newline, since that is what happens when the line is parsed. */ | |
726f6388 JA |
817 | curlen = strlen (current->line); |
818 | ||
ccc6cda3 | 819 | if (dstack.delimiter_depth == 0 && current->line[curlen - 1] == '\\' && |
726f6388 JA |
820 | current->line[curlen - 2] != '\\') |
821 | { | |
822 | current->line[curlen - 1] = '\0'; | |
823 | curlen--; | |
824 | chars_to_add = ""; | |
825 | } | |
826 | ||
495aee44 CR |
827 | /* If we're not in some kind of quoted construct, the current history |
828 | entry ends with a newline, and we're going to add a semicolon, | |
829 | don't. In some cases, it results in a syntax error (e.g., before | |
830 | a close brace), and it should not be needed. */ | |
831 | if (dstack.delimiter_depth == 0 && current->line[curlen - 1] == '\n' && *chars_to_add == ';') | |
832 | chars_to_add++; | |
833 | ||
f73dda09 JA |
834 | new_line = (char *)xmalloc (1 |
835 | + curlen | |
836 | + strlen (line) | |
837 | + strlen (chars_to_add)); | |
726f6388 | 838 | sprintf (new_line, "%s%s%s", current->line, chars_to_add, line); |
ccc6cda3 | 839 | offset = where_history (); |
726f6388 JA |
840 | old = replace_history_entry (offset, new_line, current->data); |
841 | free (new_line); | |
842 | ||
843 | if (old) | |
b80f6443 JA |
844 | free_history_entry (old); |
845 | ||
726f6388 JA |
846 | add_it = 0; |
847 | } | |
848 | } | |
849 | ||
850 | if (add_it) | |
7117c2d2 JA |
851 | really_add_history (line); |
852 | ||
0001803f CR |
853 | #if defined (SYSLOG_HISTORY) |
854 | bash_syslog_history (line); | |
855 | #endif | |
856 | ||
726f6388 JA |
857 | using_history (); |
858 | } | |
859 | ||
7117c2d2 JA |
860 | static void |
861 | really_add_history (line) | |
862 | char *line; | |
863 | { | |
864 | hist_last_line_added = 1; | |
95732b49 | 865 | hist_last_line_pushed = 0; |
7117c2d2 JA |
866 | add_history (line); |
867 | history_lines_this_session++; | |
868 | } | |
869 | ||
726f6388 JA |
870 | int |
871 | history_number () | |
872 | { | |
873 | using_history (); | |
95732b49 | 874 | return (remember_on_history ? history_base + where_history () : 1); |
ccc6cda3 JA |
875 | } |
876 | ||
877 | static int | |
878 | should_expand (s) | |
879 | char *s; | |
880 | { | |
881 | char *p; | |
882 | ||
883 | for (p = s; p && *p; p++) | |
884 | { | |
885 | if (*p == '\\') | |
886 | p++; | |
887 | else if (*p == '&') | |
888 | return 1; | |
889 | } | |
890 | return 0; | |
891 | } | |
892 | ||
893 | static int | |
894 | histignore_item_func (ign) | |
895 | struct ign *ign; | |
896 | { | |
897 | if (should_expand (ign->val)) | |
898 | ign->flags |= HIGN_EXPAND; | |
899 | return (0); | |
900 | } | |
901 | ||
902 | void | |
903 | setup_history_ignore (varname) | |
904 | char *varname; | |
905 | { | |
906 | setup_ignore_patterns (&histignore); | |
907 | } | |
908 | ||
909 | static HIST_ENTRY * | |
910 | last_history_entry () | |
911 | { | |
912 | HIST_ENTRY *he; | |
913 | ||
914 | using_history (); | |
915 | he = previous_history (); | |
916 | using_history (); | |
917 | return he; | |
918 | } | |
919 | ||
920 | char * | |
921 | last_history_line () | |
922 | { | |
923 | HIST_ENTRY *he; | |
924 | ||
925 | he = last_history_entry (); | |
926 | if (he == 0) | |
927 | return ((char *)NULL); | |
928 | return he->line; | |
929 | } | |
930 | ||
931 | static char * | |
932 | expand_histignore_pattern (pat) | |
933 | char *pat; | |
934 | { | |
935 | HIST_ENTRY *phe; | |
bb70624e | 936 | char *ret; |
ccc6cda3 JA |
937 | |
938 | phe = last_history_entry (); | |
939 | ||
940 | if (phe == (HIST_ENTRY *)0) | |
941 | return (savestring (pat)); | |
942 | ||
bb70624e | 943 | ret = strcreplace (pat, '&', phe->line, 1); |
ccc6cda3 | 944 | |
ccc6cda3 JA |
945 | return ret; |
946 | } | |
947 | ||
948 | /* Return 1 if we should not put LINE into the history according to the | |
949 | patterns in HISTIGNORE. */ | |
950 | static int | |
951 | history_should_ignore (line) | |
952 | char *line; | |
953 | { | |
954 | register int i, match; | |
955 | char *npat; | |
956 | ||
957 | if (histignore.num_ignores == 0) | |
958 | return 0; | |
959 | ||
960 | for (i = match = 0; i < histignore.num_ignores; i++) | |
961 | { | |
962 | if (histignore.ignores[i].flags & HIGN_EXPAND) | |
963 | npat = expand_histignore_pattern (histignore.ignores[i].val); | |
964 | else | |
965 | npat = histignore.ignores[i].val; | |
966 | ||
f73dda09 | 967 | match = strmatch (npat, line, FNMATCH_EXTFLAG) != FNM_NOMATCH; |
ccc6cda3 JA |
968 | |
969 | if (histignore.ignores[i].flags & HIGN_EXPAND) | |
970 | free (npat); | |
971 | ||
972 | if (match) | |
973 | break; | |
974 | } | |
975 | ||
976 | return match; | |
726f6388 | 977 | } |
ccc6cda3 | 978 | #endif /* HISTORY */ |