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726f6388 JA |
1 | This file is fc.def, from which is created fc.c. |
2 | It implements the builtin "fc" in Bash. | |
3 | ||
4 | Copyright (C) 1987, 1989, 1991 Free Software Foundation, Inc. | |
5 | ||
6 | This file is part of GNU Bash, the Bourne Again SHell. | |
7 | ||
8 | Bash is free software; you can redistribute it and/or modify it under | |
9 | the terms of the GNU General Public License as published by the Free | |
10 | Software Foundation; either version 1, or (at your option) any later | |
11 | version. | |
12 | ||
13 | Bash is distributed in the hope that it will be useful, but WITHOUT ANY | |
14 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License along | |
19 | with Bash; see the file COPYING. If not, write to the Free Software | |
20 | Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
21 | ||
22 | $PRODUCES fc.c | |
23 | ||
24 | $BUILTIN fc | |
25 | $FUNCTION fc_builtin | |
26 | $DEPENDS_ON HISTORY | |
27 | $SHORT_DOC fc [-e ename] [-nlr] [first] [last] or fc -s [pat=rep] [cmd] | |
28 | ||
29 | FIRST and LAST can be numbers specifying the range, or FIRST can be a | |
30 | string, which means the most recent command beginning with that | |
31 | string. | |
32 | ||
33 | -e ENAME selects which editor to use. Default is FCEDIT, then EDITOR, | |
34 | then the editor which corresponds to the current readline editing | |
35 | mode, then vi. | |
36 | ||
37 | -l means list lines instead of editing. | |
38 | -n means no line numbers listed. | |
39 | -r means reverse the order of the lines (making it newest listed first). | |
40 | ||
41 | With the `fc -s [pat=rep ...] [command]' format, the command is | |
42 | re-executed after the substitution OLD=NEW is performed. | |
43 | ||
44 | A useful alias to use with this is r='fc -s', so that typing `r cc' | |
45 | runs the last command beginning with `cc' and typing `r' re-executes | |
46 | the last command. | |
47 | $END | |
48 | ||
ccc6cda3 JA |
49 | #include <config.h> |
50 | ||
726f6388 JA |
51 | #if defined (HISTORY) |
52 | #include <sys/param.h> | |
d166f048 JA |
53 | #include "../bashtypes.h" |
54 | #include "../posixstat.h" | |
726f6388 | 55 | #include <sys/file.h> |
ccc6cda3 JA |
56 | |
57 | #if defined (HAVE_UNISTD_H) | |
58 | # include <unistd.h> | |
59 | #endif | |
60 | ||
61 | #include <stdio.h> | |
62 | ||
63 | #include "../bashansi.h" | |
726f6388 | 64 | #include <errno.h> |
ccc6cda3 JA |
65 | |
66 | #include "../shell.h" | |
726f6388 JA |
67 | #include "../builtins.h" |
68 | #include "../flags.h" | |
69 | #include "../maxpath.h" | |
70 | #include "../bashhist.h" | |
71 | #include <readline/history.h> | |
72 | #include "bashgetopt.h" | |
ccc6cda3 | 73 | #include "common.h" |
726f6388 | 74 | |
726f6388 JA |
75 | #if !defined (errno) |
76 | extern int errno; | |
77 | #endif /* !errno */ | |
78 | ||
79 | extern int echo_input_at_read; | |
d166f048 JA |
80 | extern int current_command_line_count; |
81 | extern int literal_history; | |
726f6388 JA |
82 | |
83 | extern int unlink (); | |
84 | ||
d166f048 JA |
85 | extern int fc_execute_file (); |
86 | ||
726f6388 JA |
87 | /* **************************************************************** */ |
88 | /* */ | |
89 | /* The K*rn shell style fc command (Fix Command) */ | |
90 | /* */ | |
91 | /* **************************************************************** */ | |
92 | ||
93 | /* fc builtin command (fix command) for Bash for those who | |
94 | like K*rn-style history better than csh-style. | |
95 | ||
96 | fc [-e ename] [-nlr] [first] [last] | |
97 | ||
98 | FIRST and LAST can be numbers specifying the range, or FIRST can be | |
99 | a string, which means the most recent command beginning with that | |
100 | string. | |
101 | ||
102 | -e ENAME selects which editor to use. Default is FCEDIT, then EDITOR, | |
103 | then the editor which corresponds to the current readline editing | |
104 | mode, then vi. | |
105 | ||
106 | -l means list lines instead of editing. | |
107 | -n means no line numbers listed. | |
108 | -r means reverse the order of the lines (making it newest listed first). | |
109 | ||
110 | fc -e - [pat=rep ...] [command] | |
111 | fc -s [pat=rep ...] [command] | |
112 | ||
113 | Equivalent to !command:sg/pat/rep execpt there can be multiple PAT=REP's. | |
114 | */ | |
115 | ||
ccc6cda3 JA |
116 | static char *fc_dosubs (), *fc_gethist (), *fc_readline (); |
117 | static int fc_gethnum (), fc_number (); | |
726f6388 JA |
118 | static void fc_replhist (), fc_addhist (); |
119 | ||
120 | /* Data structure describing a list of global replacements to perform. */ | |
121 | typedef struct repl { | |
122 | struct repl *next; | |
123 | char *pat; | |
124 | char *rep; | |
125 | } REPL; | |
126 | ||
726f6388 JA |
127 | /* Accessors for HIST_ENTRY lists that are called HLIST. */ |
128 | #define histline(i) (hlist[(i)]->line) | |
129 | #define histdata(i) (hlist[(i)]->data) | |
130 | ||
131 | #define FREE_RLIST() \ | |
132 | do { \ | |
133 | for (rl = rlist; rl; ) { \ | |
134 | REPL *r; \ | |
135 | r = rl->next; \ | |
136 | if (rl->pat) \ | |
137 | free (rl->pat); \ | |
138 | if (rl->rep) \ | |
139 | free (rl->rep); \ | |
140 | free (rl); \ | |
141 | rl = r; \ | |
142 | } \ | |
143 | } while (0) | |
144 | ||
145 | /* String to execute on a file that we want to edit. */ | |
146 | #define FC_EDIT_COMMAND "${FCEDIT:-${EDITOR:-vi}}" | |
147 | ||
148 | int | |
149 | fc_builtin (list) | |
150 | WORD_LIST *list; | |
151 | { | |
152 | register int i; | |
153 | register char *sep; | |
154 | int numbering, reverse, listing, execute; | |
155 | int histbeg, histend, last_hist, retval, first, opt; | |
156 | FILE *stream; | |
ccc6cda3 JA |
157 | REPL *rlist, *rl; |
158 | char *ename, *command, *newcom, *line; | |
726f6388 | 159 | HIST_ENTRY **hlist; |
ccc6cda3 | 160 | char fn[64]; |
726f6388 JA |
161 | |
162 | numbering = 1; | |
163 | reverse = listing = execute = 0; | |
ccc6cda3 | 164 | ename = (char *)NULL; |
726f6388 JA |
165 | |
166 | /* Parse out the options and set which of the two forms we're in. */ | |
ccc6cda3 JA |
167 | reset_internal_getopt (); |
168 | lcurrent = list; /* XXX */ | |
169 | while (fc_number (loptend = lcurrent) == 0 && | |
170 | (opt = internal_getopt (list, ":e:lnrs")) != -1) | |
726f6388 | 171 | { |
ccc6cda3 JA |
172 | switch (opt) |
173 | { | |
174 | case 'n': | |
175 | numbering = 0; | |
176 | break; | |
726f6388 | 177 | |
ccc6cda3 JA |
178 | case 'l': |
179 | listing = 1; | |
180 | break; | |
726f6388 | 181 | |
ccc6cda3 JA |
182 | case 'r': |
183 | reverse = 1; | |
184 | break; | |
185 | ||
186 | case 's': | |
187 | execute = 1; | |
188 | break; | |
189 | ||
190 | case 'e': | |
191 | ename = list_optarg; | |
192 | break; | |
193 | ||
194 | default: | |
195 | builtin_usage (); | |
196 | return (EX_USAGE); | |
726f6388 | 197 | } |
726f6388 JA |
198 | } |
199 | ||
ccc6cda3 JA |
200 | list = loptend; |
201 | ||
726f6388 JA |
202 | if (ename && (*ename == '-') && (ename[1] == '\0')) |
203 | execute = 1; | |
204 | ||
205 | /* The "execute" form of the command (re-run, with possible string | |
206 | substitutions). */ | |
207 | if (execute) | |
208 | { | |
ccc6cda3 | 209 | rlist = (REPL *)NULL; |
726f6388 JA |
210 | while (list && ((sep = (char *)strchr (list->word->word, '=')) != NULL)) |
211 | { | |
212 | *sep++ = '\0'; | |
213 | rl = (REPL *)xmalloc (sizeof (REPL)); | |
214 | rl->next = (REPL *)NULL; | |
215 | rl->pat = savestring (list->word->word); | |
216 | rl->rep = savestring (sep); | |
217 | ||
218 | if (rlist == NULL) | |
219 | rlist = rl; | |
220 | else | |
221 | { | |
222 | rl->next = rlist; | |
223 | rlist = rl; | |
224 | } | |
225 | list = list->next; | |
226 | } | |
227 | ||
228 | /* If we have a list of substitutions to do, then reverse it | |
229 | to get the replacements in the proper order. */ | |
230 | ||
231 | if (rlist && rlist->next) | |
ccc6cda3 | 232 | rlist = (REPL *)reverse_list ((GENERIC_LIST *) rlist); |
726f6388 JA |
233 | |
234 | hlist = history_list (); | |
235 | ||
236 | /* If we still have something in list, it is a command spec. | |
237 | Otherwise, we use the most recent command in time. */ | |
ccc6cda3 | 238 | command = fc_gethist (list ? list->word->word : (char *)NULL, hlist); |
726f6388 JA |
239 | |
240 | if (command == NULL) | |
241 | { | |
242 | builtin_error ("no command found"); | |
243 | if (rlist) | |
244 | FREE_RLIST (); | |
245 | ||
246 | return (EXECUTION_FAILURE); | |
247 | } | |
248 | ||
249 | if (rlist) | |
250 | { | |
251 | newcom = fc_dosubs (command, rlist); | |
252 | free (command); | |
253 | FREE_RLIST (); | |
254 | command = newcom; | |
255 | } | |
256 | ||
ccc6cda3 JA |
257 | fprintf (stderr, "%s\n", command); |
258 | fc_replhist (command); /* replace `fc -s' with command */ | |
d166f048 | 259 | return (parse_and_execute (command, "fc", SEVAL_NOHIST)); |
726f6388 JA |
260 | } |
261 | ||
262 | /* This is the second form of the command (the list-or-edit-and-rerun | |
263 | form). */ | |
264 | hlist = history_list (); | |
265 | if (hlist == 0) | |
266 | return (EXECUTION_SUCCESS); | |
267 | for (i = 0; hlist[i]; i++); | |
268 | ||
269 | /* With the Bash implementation of history, the current command line | |
270 | ("fc blah..." and so on) is already part of the history list by | |
271 | the time we get to this point. This just skips over that command | |
272 | and makes the last command that this deals with be the last command | |
d166f048 JA |
273 | the user entered before the fc. We need to check whether the |
274 | line was actually added (HISTIGNORE may have caused it to not be), | |
275 | so we check hist_last_line_added. */ | |
726f6388 | 276 | |
d166f048 | 277 | last_hist = i - 1 - hist_last_line_added; |
726f6388 JA |
278 | |
279 | if (list) | |
280 | { | |
281 | histbeg = fc_gethnum (list->word->word, hlist); | |
282 | list = list->next; | |
283 | ||
284 | if (list) | |
285 | histend = fc_gethnum (list->word->word, hlist); | |
286 | else | |
ccc6cda3 | 287 | histend = listing ? last_hist : histbeg; |
726f6388 JA |
288 | } |
289 | else | |
290 | { | |
291 | /* The default for listing is the last 16 history items. */ | |
292 | if (listing) | |
293 | { | |
294 | histend = last_hist; | |
295 | histbeg = histend - 16; | |
296 | if (histbeg < 0) | |
297 | histbeg = 0; | |
298 | } | |
299 | else | |
ccc6cda3 JA |
300 | /* For editing, it is the last history command. */ |
301 | histbeg = histend = last_hist; | |
726f6388 JA |
302 | } |
303 | ||
304 | /* We print error messages for line specifications out of range. */ | |
305 | if ((histbeg < 0) || (histend < 0) || | |
306 | (histbeg > last_hist) || (histend > last_hist)) | |
307 | { | |
308 | builtin_error ("history specification out of range"); | |
309 | return (EXECUTION_FAILURE); | |
310 | } | |
311 | ||
312 | if (histend < histbeg) | |
313 | { | |
ccc6cda3 | 314 | i = histend; |
726f6388 | 315 | histend = histbeg; |
ccc6cda3 JA |
316 | histbeg = i; |
317 | ||
726f6388 JA |
318 | reverse = 1; |
319 | } | |
320 | ||
321 | if (listing) | |
322 | stream = stdout; | |
323 | else | |
324 | { | |
325 | numbering = 0; | |
d166f048 | 326 | /* XXX - this is raceable */ |
ccc6cda3 | 327 | sprintf (fn, "/tmp/bash%d", (int)time ((time_t *) 0) + (int)getpid ()); |
726f6388 JA |
328 | |
329 | stream = fopen (fn, "w"); | |
330 | ||
ccc6cda3 | 331 | if (stream == 0) |
726f6388 JA |
332 | { |
333 | builtin_error ("cannot open temp file %s", fn); | |
334 | return (EXECUTION_FAILURE); | |
335 | } | |
336 | } | |
337 | ||
ccc6cda3 | 338 | for (i = reverse ? histend : histbeg; reverse ? i >= histbeg : i <= histend; reverse ? i-- : i++) |
726f6388 | 339 | { |
ccc6cda3 JA |
340 | QUIT; |
341 | if (numbering) | |
342 | fprintf (stream, "%d", i + history_base); | |
343 | if (listing) | |
344 | fprintf (stream, "\t%c", histdata (i) ? '*' : ' '); | |
345 | fprintf (stream, "%s\n", histline (i)); | |
726f6388 JA |
346 | } |
347 | ||
348 | if (listing) | |
349 | return (EXECUTION_SUCCESS); | |
350 | ||
351 | fclose (stream); | |
352 | ||
353 | /* Now edit the file of commands. */ | |
354 | if (ename) | |
355 | { | |
356 | command = (char *)xmalloc (strlen (ename) + strlen (fn) + 2); | |
357 | sprintf (command, "%s %s", ename, fn); | |
358 | } | |
359 | else | |
360 | { | |
361 | command = (char *)xmalloc (3 + strlen (FC_EDIT_COMMAND) + strlen (fn)); | |
362 | sprintf (command, "%s %s", FC_EDIT_COMMAND, fn); | |
363 | } | |
d166f048 | 364 | retval = parse_and_execute (command, "fc", SEVAL_NOHIST); |
ccc6cda3 JA |
365 | if (retval != EXECUTION_SUCCESS) |
366 | { | |
367 | unlink (fn); | |
368 | return (EXECUTION_FAILURE); | |
369 | } | |
726f6388 JA |
370 | |
371 | /* Now reopen the file and execute the edited commands. */ | |
372 | ||
373 | stream = fopen (fn, "r"); | |
374 | ||
375 | if (stream == NULL) | |
376 | { | |
377 | builtin_error ("cannot reopen temp file %s", fn); | |
378 | unlink (fn); | |
379 | return (EXECUTION_FAILURE); | |
380 | } | |
381 | ||
382 | retval = EXECUTION_SUCCESS; | |
383 | first = 1; | |
384 | ||
d166f048 JA |
385 | #if 1 |
386 | /* Make sure parse_and_execute doesn't turn this off, even though a | |
387 | call to parse_and_execute farther up the function call stack (e.g., | |
388 | if this is called by vi_edit_and_execute_command) may have already | |
389 | called bash_history_disable. */ | |
390 | remember_on_history = 1; | |
391 | #else | |
726f6388 JA |
392 | /* First, write the commands to the history file. This will not happen |
393 | when we call parse_and_execute, since parse_and_execute disables | |
394 | the command line history while it executes. */ | |
d166f048 JA |
395 | |
396 | opt = current_command_line_count; | |
726f6388 JA |
397 | while ((line = fc_readline (stream)) != NULL) |
398 | { | |
399 | if (line[0] == '\n') | |
400 | { | |
401 | free (line); | |
402 | continue; /* Skip blank lines. */ | |
403 | } | |
404 | ||
405 | if (first) | |
406 | { | |
407 | first = 0; | |
d166f048 JA |
408 | /* If we retrieved only one command from the history file, but we |
409 | read multiple lines from the edited file, and literal_history | |
410 | has been set by `shopt', we assume that it was a compound | |
411 | command stored with embedded newlines. In this case, we want | |
412 | the history code to store it as one command again. */ | |
413 | if (literal_history && histbeg == histend) | |
414 | current_command_line_count = 1; | |
726f6388 JA |
415 | fc_replhist (line); |
416 | } | |
417 | else | |
d166f048 JA |
418 | { |
419 | if (literal_history && histbeg == histend) | |
420 | current_command_line_count++; | |
421 | fc_addhist (line); | |
422 | } | |
726f6388 JA |
423 | |
424 | free (line); | |
425 | } | |
426 | fclose (stream); | |
d166f048 JA |
427 | current_command_line_count = opt; |
428 | #endif | |
726f6388 | 429 | |
d166f048 | 430 | /* Turn on the `v' flag while fc_execute_file runs so the commands |
726f6388 JA |
431 | will be echoed as they are read by the parser. */ |
432 | begin_unwind_frame ("fc builtin"); | |
433 | add_unwind_protect (unlink, fn); | |
434 | unwind_protect_int (echo_input_at_read); | |
435 | echo_input_at_read = 1; | |
436 | ||
d166f048 | 437 | retval = fc_execute_file (fn); |
726f6388 JA |
438 | |
439 | run_unwind_frame ("fc builtin"); | |
440 | ||
441 | return (retval); | |
442 | } | |
443 | ||
ccc6cda3 JA |
444 | /* Return 1 if LIST->word->word is a legal number for fc's use. */ |
445 | static int | |
446 | fc_number (list) | |
447 | WORD_LIST *list; | |
448 | { | |
449 | char *s; | |
450 | ||
451 | if (list == 0) | |
452 | return 0; | |
453 | s = list->word->word; | |
454 | if (*s == '-') | |
455 | s++; | |
456 | return (legal_number (s, (long *)NULL)); | |
457 | } | |
458 | ||
726f6388 JA |
459 | /* Return an absolute index into HLIST which corresponds to COMMAND. If |
460 | COMMAND is a number, then it was specified in relative terms. If it | |
461 | is a string, then it is the start of a command line present in HLIST. */ | |
462 | static int | |
463 | fc_gethnum (command, hlist) | |
464 | char *command; | |
465 | HIST_ENTRY **hlist; | |
466 | { | |
467 | int sign = 1, n, clen; | |
468 | register int i, j; | |
469 | register char *s; | |
470 | ||
471 | /* Count history elements. */ | |
472 | for (i = 0; hlist[i]; i++); | |
473 | ||
474 | /* With the Bash implementation of history, the current command line | |
475 | ("fc blah..." and so on) is already part of the history list by | |
476 | the time we get to this point. This just skips over that command | |
477 | and makes the last command that this deals with be the last command | |
d166f048 JA |
478 | the user entered before the fc. We need to check whether the |
479 | line was actually added (HISTIGNORE may have caused it to not be), | |
480 | so we check hist_last_line_added. */ | |
481 | i -= 1 + hist_last_line_added; | |
726f6388 JA |
482 | |
483 | /* No specification defaults to most recent command. */ | |
484 | if (command == NULL) | |
485 | return (i); | |
486 | ||
487 | /* Otherwise, there is a specification. It can be a number relative to | |
488 | the current position, or an absolute history number. */ | |
489 | s = command; | |
490 | ||
491 | /* Handle possible leading minus sign. */ | |
492 | if (s && (*s == '-')) | |
493 | { | |
494 | sign = -1; | |
495 | s++; | |
496 | } | |
497 | ||
498 | if (s && digit(*s)) | |
499 | { | |
500 | n = atoi (s); | |
501 | n *= sign; | |
502 | ||
503 | /* Anything specified greater than the last history element that we | |
504 | deal with is an error. */ | |
505 | if (n > i + history_base) | |
506 | return (-1); | |
507 | ||
508 | /* If the value is negative or zero, then it is an offset from | |
509 | the current history item. */ | |
510 | if (n < 0) | |
511 | return (i + n + 1); | |
512 | else if (n == 0) | |
513 | return (i); | |
514 | else | |
515 | return (n - history_base); | |
516 | } | |
517 | ||
518 | clen = strlen (command); | |
519 | for (j = i; j >= 0; j--) | |
520 | { | |
521 | if (STREQN (command, histline (j), clen)) | |
522 | return (j); | |
523 | } | |
524 | return (-1); | |
525 | } | |
526 | ||
527 | /* Locate the most recent history line which begins with | |
528 | COMMAND in HLIST, and return a malloc()'ed copy of it. */ | |
529 | static char * | |
530 | fc_gethist (command, hlist) | |
531 | char *command; | |
532 | HIST_ENTRY **hlist; | |
533 | { | |
534 | int i; | |
535 | ||
536 | if (!hlist) | |
537 | return ((char *)NULL); | |
538 | ||
539 | i = fc_gethnum (command, hlist); | |
540 | ||
541 | if (i >= 0) | |
542 | return (savestring (histline (i))); | |
543 | else | |
544 | return ((char *)NULL); | |
545 | } | |
546 | ||
547 | /* Read the edited history lines from STREAM and return them | |
548 | one at a time. This can read unlimited length lines. The | |
549 | caller should free the storage. */ | |
550 | static char * | |
551 | fc_readline (stream) | |
552 | FILE *stream; | |
553 | { | |
554 | register int c; | |
555 | int line_len = 0, lindex = 0; | |
556 | char *line = (char *)NULL; | |
557 | ||
558 | while ((c = getc (stream)) != EOF) | |
559 | { | |
560 | if ((lindex + 2) >= line_len) | |
561 | line = (char *) xrealloc (line, (line_len += 128)); | |
562 | ||
563 | if (c == '\n') | |
564 | { | |
565 | line[lindex++] = '\n'; | |
566 | line[lindex++] = '\0'; | |
567 | return (line); | |
568 | } | |
569 | else | |
570 | line[lindex++] = c; | |
571 | } | |
572 | ||
573 | if (!lindex) | |
574 | { | |
575 | if (line) | |
576 | free (line); | |
577 | ||
578 | return ((char *)NULL); | |
579 | } | |
580 | ||
581 | if (lindex + 2 >= line_len) | |
582 | line = (char *)xrealloc (line, lindex + 3); | |
583 | ||
584 | line[lindex++] = '\n'; /* Finish with newline if none in file */ | |
585 | line[lindex++] = '\0'; | |
586 | return (line); | |
587 | } | |
588 | ||
589 | /* Perform the SUBS on COMMAND. | |
590 | SUBS is a list of substitutions, and COMMAND is a simple string. | |
591 | Return a pointer to a malloc'ed string which contains the substituted | |
592 | command. */ | |
593 | static char * | |
594 | fc_dosubs (command, subs) | |
595 | char *command; | |
596 | REPL *subs; | |
597 | { | |
ccc6cda3 | 598 | register char *new, *t; |
726f6388 JA |
599 | register REPL *r; |
600 | ||
ccc6cda3 | 601 | for (new = savestring (command), r = subs; r; r = r->next) |
726f6388 | 602 | { |
ccc6cda3 | 603 | t = strsub (new, r->pat, r->rep, 1); |
726f6388 JA |
604 | free (new); |
605 | new = t; | |
606 | } | |
607 | return (new); | |
608 | } | |
609 | ||
726f6388 JA |
610 | /* Use `command' to replace the last entry in the history list, which, |
611 | by this time, is `fc blah...'. The intent is that the new command | |
612 | become the history entry, and that `fc' should never appear in the | |
613 | history list. This way you can do `r' to your heart's content. */ | |
614 | static void | |
615 | fc_replhist (command) | |
616 | char *command; | |
617 | { | |
618 | register int i; | |
619 | HIST_ENTRY **hlist, *histent, *discard; | |
726f6388 JA |
620 | int n; |
621 | ||
ccc6cda3 | 622 | if (command == 0 || *command == '\0') |
726f6388 JA |
623 | return; |
624 | ||
625 | hlist = history_list (); | |
626 | ||
627 | if (hlist == NULL) | |
628 | return; | |
629 | ||
630 | for (i = 0; hlist[i]; i++); | |
631 | i--; | |
632 | ||
633 | /* History_get () takes a parameter that should be | |
634 | offset by history_base. */ | |
635 | ||
636 | histent = history_get (history_base + i); /* Don't free this */ | |
637 | if (histent == NULL) | |
638 | return; | |
639 | ||
640 | n = strlen (command); | |
641 | ||
642 | if (command[n - 1] == '\n') | |
643 | command[n - 1] = '\0'; | |
644 | ||
645 | if (command && *command) | |
646 | { | |
647 | discard = remove_history (i); | |
648 | if (discard) | |
649 | { | |
ccc6cda3 | 650 | FREE (discard->line); |
726f6388 JA |
651 | free ((char *) discard); |
652 | } | |
653 | maybe_add_history (command); /* Obeys HISTCONTROL setting. */ | |
654 | } | |
655 | } | |
656 | ||
657 | /* Add LINE to the history, after removing a single trailing newline. */ | |
658 | static void | |
659 | fc_addhist (line) | |
660 | char *line; | |
661 | { | |
662 | register int n; | |
663 | ||
664 | n = strlen (line); | |
665 | ||
666 | if (line[n - 1] == '\n') | |
667 | line[n - 1] = '\0'; | |
668 | ||
669 | if (line && *line) | |
670 | maybe_add_history (line); | |
671 | } | |
672 | #endif /* HISTORY */ |