]>
Commit | Line | Data |
---|---|---|
ccc6cda3 JA |
1 | This file is pushd.def, from which is created pushd.c. It implements the |
2 | builtins "pushd", "popd", and "dirs" in Bash. | |
3 | ||
8868edaf | 4 | Copyright (C) 1987-2020 Free Software Foundation, Inc. |
ccc6cda3 JA |
5 | |
6 | This file is part of GNU Bash, the Bourne Again SHell. | |
7 | ||
3185942a JA |
8 | Bash is free software: you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation, either version 3 of the License, or | |
11 | (at your option) any later version. | |
ccc6cda3 | 12 | |
3185942a JA |
13 | Bash is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
ccc6cda3 | 17 | |
3185942a JA |
18 | You should have received a copy of the GNU General Public License |
19 | along with Bash. If not, see <http://www.gnu.org/licenses/>. | |
ccc6cda3 JA |
20 | |
21 | $PRODUCES pushd.c | |
22 | ||
23 | $BUILTIN pushd | |
24 | $FUNCTION pushd_builtin | |
25 | $DEPENDS_ON PUSHD_AND_POPD | |
3185942a JA |
26 | $SHORT_DOC pushd [-n] [+N | -N | dir] |
27 | Add directories to stack. | |
28 | ||
ccc6cda3 JA |
29 | Adds a directory to the top of the directory stack, or rotates |
30 | the stack, making the new top of the stack the current working | |
31 | directory. With no arguments, exchanges the top two directories. | |
32 | ||
3185942a JA |
33 | Options: |
34 | -n Suppresses the normal change of directory when adding | |
a0c0a00f | 35 | directories to the stack, so only the stack is manipulated. |
3185942a JA |
36 | |
37 | Arguments: | |
38 | +N Rotates the stack so that the Nth directory (counting | |
a0c0a00f CR |
39 | from the left of the list shown by `dirs', starting with |
40 | zero) is at the top. | |
ccc6cda3 | 41 | |
3185942a | 42 | -N Rotates the stack so that the Nth directory (counting |
a0c0a00f CR |
43 | from the right of the list shown by `dirs', starting with |
44 | zero) is at the top. | |
ccc6cda3 | 45 | |
3185942a | 46 | dir Adds DIR to the directory stack at the top, making it the |
a0c0a00f | 47 | new current working directory. |
ccc6cda3 | 48 | |
3185942a JA |
49 | The `dirs' builtin displays the directory stack. |
50 | ||
51 | Exit Status: | |
52 | Returns success unless an invalid argument is supplied or the directory | |
53 | change fails. | |
ccc6cda3 JA |
54 | $END |
55 | ||
56 | $BUILTIN popd | |
57 | $FUNCTION popd_builtin | |
58 | $DEPENDS_ON PUSHD_AND_POPD | |
3185942a JA |
59 | $SHORT_DOC popd [-n] [+N | -N] |
60 | Remove directories from stack. | |
61 | ||
62 | Removes entries from the directory stack. With no arguments, removes | |
63 | the top directory from the stack, and changes to the new top directory. | |
ccc6cda3 | 64 | |
3185942a JA |
65 | Options: |
66 | -n Suppresses the normal change of directory when removing | |
a0c0a00f | 67 | directories from the stack, so only the stack is manipulated. |
3185942a JA |
68 | |
69 | Arguments: | |
70 | +N Removes the Nth entry counting from the left of the list | |
a0c0a00f CR |
71 | shown by `dirs', starting with zero. For example: `popd +0' |
72 | removes the first directory, `popd +1' the second. | |
ccc6cda3 | 73 | |
3185942a | 74 | -N Removes the Nth entry counting from the right of the list |
a0c0a00f CR |
75 | shown by `dirs', starting with zero. For example: `popd -0' |
76 | removes the last directory, `popd -1' the next to last. | |
ccc6cda3 | 77 | |
3185942a | 78 | The `dirs' builtin displays the directory stack. |
ccc6cda3 | 79 | |
3185942a JA |
80 | Exit Status: |
81 | Returns success unless an invalid argument is supplied or the directory | |
82 | change fails. | |
ccc6cda3 JA |
83 | $END |
84 | ||
85 | $BUILTIN dirs | |
86 | $FUNCTION dirs_builtin | |
87 | $DEPENDS_ON PUSHD_AND_POPD | |
88 | $SHORT_DOC dirs [-clpv] [+N] [-N] | |
3185942a JA |
89 | Display directory stack. |
90 | ||
ccc6cda3 JA |
91 | Display the list of currently remembered directories. Directories |
92 | find their way onto the list with the `pushd' command; you can get | |
93 | back up through the list with the `popd' command. | |
94 | ||
3185942a JA |
95 | Options: |
96 | -c clear the directory stack by deleting all of the elements | |
97 | -l do not print tilde-prefixed versions of directories relative | |
a0c0a00f | 98 | to your home directory |
3185942a JA |
99 | -p print the directory stack with one entry per line |
100 | -v print the directory stack with one entry per line prefixed | |
a0c0a00f | 101 | with its position in the stack |
ccc6cda3 | 102 | |
3185942a | 103 | Arguments: |
a0c0a00f CR |
104 | +N Displays the Nth entry counting from the left of the list |
105 | shown by dirs when invoked without options, starting with | |
106 | zero. | |
ccc6cda3 | 107 | |
a0c0a00f CR |
108 | -N Displays the Nth entry counting from the right of the list |
109 | shown by dirs when invoked without options, starting with | |
110 | zero. | |
3185942a JA |
111 | |
112 | Exit Status: | |
113 | Returns success unless an invalid option is supplied or an error occurs. | |
ccc6cda3 JA |
114 | $END |
115 | ||
116 | #include <config.h> | |
117 | ||
118 | #if defined (PUSHD_AND_POPD) | |
119 | #include <stdio.h> | |
ac50fbac | 120 | #if defined (HAVE_SYS_PARAM_H) |
cce855bc JA |
121 | # include <sys/param.h> |
122 | #endif | |
ccc6cda3 JA |
123 | |
124 | #if defined (HAVE_UNISTD_H) | |
cce855bc JA |
125 | # ifdef _MINIX |
126 | # include <sys/types.h> | |
127 | # endif | |
ccc6cda3 JA |
128 | # include <unistd.h> |
129 | #endif | |
130 | ||
131 | #include "../bashansi.h" | |
b80f6443 | 132 | #include "../bashintl.h" |
ccc6cda3 JA |
133 | |
134 | #include <errno.h> | |
135 | ||
136 | #include <tilde/tilde.h> | |
137 | ||
138 | #include "../shell.h" | |
bb70624e | 139 | #include "maxpath.h" |
ccc6cda3 JA |
140 | #include "common.h" |
141 | #include "builtext.h" | |
142 | ||
b72432fd JA |
143 | #ifdef LOADABLE_BUILTIN |
144 | # include "builtins.h" | |
145 | #endif | |
146 | ||
ccc6cda3 JA |
147 | #if !defined (errno) |
148 | extern int errno; | |
149 | #endif /* !errno */ | |
150 | ||
ccc6cda3 JA |
151 | /* The list of remembered directories. */ |
152 | static char **pushd_directory_list = (char **)NULL; | |
153 | ||
154 | /* Number of existing slots in this list. */ | |
155 | static int directory_list_size; | |
156 | ||
157 | /* Offset to the end of the list. */ | |
158 | static int directory_list_offset; | |
159 | ||
8868edaf CR |
160 | static void pushd_error PARAMS((int, char *)); |
161 | static void clear_directory_stack PARAMS((void)); | |
162 | static int cd_to_string PARAMS((char *)); | |
163 | static int change_to_temp PARAMS((char *)); | |
164 | static void add_dirstack_element PARAMS((char *)); | |
165 | static int get_dirstack_index PARAMS((intmax_t, int, int *)); | |
ccc6cda3 JA |
166 | |
167 | #define NOCD 0x01 | |
168 | #define ROTATE 0x02 | |
169 | #define LONGFORM 0x04 | |
170 | #define CLEARSTAK 0x08 | |
171 | ||
172 | int | |
173 | pushd_builtin (list) | |
174 | WORD_LIST *list; | |
175 | { | |
95732b49 | 176 | WORD_LIST *orig_list; |
ccc6cda3 | 177 | char *temp, *current_directory, *top; |
95732b49 | 178 | int j, flags, skipopt; |
7117c2d2 | 179 | intmax_t num; |
ccc6cda3 JA |
180 | char direction; |
181 | ||
95732b49 | 182 | orig_list = list; |
a0c0a00f CR |
183 | |
184 | CHECK_HELPOPT (list); | |
7117c2d2 | 185 | if (list && list->word && ISOPTION (list->word->word, '-')) |
95732b49 JA |
186 | { |
187 | list = list->next; | |
188 | skipopt = 1; | |
189 | } | |
190 | else | |
191 | skipopt = 0; | |
7117c2d2 | 192 | |
ccc6cda3 JA |
193 | /* If there is no argument list then switch current and |
194 | top of list. */ | |
195 | if (list == 0) | |
196 | { | |
197 | if (directory_list_offset == 0) | |
198 | { | |
b80f6443 | 199 | builtin_error (_("no other directory")); |
ccc6cda3 JA |
200 | return (EXECUTION_FAILURE); |
201 | } | |
202 | ||
203 | current_directory = get_working_directory ("pushd"); | |
204 | if (current_directory == 0) | |
205 | return (EXECUTION_FAILURE); | |
206 | ||
207 | j = directory_list_offset - 1; | |
208 | temp = pushd_directory_list[j]; | |
209 | pushd_directory_list[j] = current_directory; | |
210 | j = change_to_temp (temp); | |
211 | free (temp); | |
212 | return j; | |
213 | } | |
214 | ||
95732b49 | 215 | for (flags = 0; skipopt == 0 && list; list = list->next) |
ccc6cda3 JA |
216 | { |
217 | if (ISOPTION (list->word->word, 'n')) | |
218 | { | |
219 | flags |= NOCD; | |
220 | } | |
221 | else if (ISOPTION (list->word->word, '-')) | |
28ef6c31 JA |
222 | { |
223 | list = list->next; | |
224 | break; | |
225 | } | |
ccc6cda3 JA |
226 | else if (list->word->word[0] == '-' && list->word->word[1] == '\0') |
227 | /* Let `pushd -' work like it used to. */ | |
228 | break; | |
229 | else if (((direction = list->word->word[0]) == '+') || direction == '-') | |
230 | { | |
231 | if (legal_number (list->word->word + 1, &num) == 0) | |
232 | { | |
7117c2d2 | 233 | sh_invalidnum (list->word->word); |
ccc6cda3 | 234 | builtin_usage (); |
ac50fbac | 235 | return (EX_USAGE); |
ccc6cda3 JA |
236 | } |
237 | ||
238 | if (direction == '-') | |
239 | num = directory_list_offset - num; | |
240 | ||
241 | if (num > directory_list_offset || num < 0) | |
242 | { | |
243 | pushd_error (directory_list_offset, list->word->word); | |
244 | return (EXECUTION_FAILURE); | |
245 | } | |
246 | flags |= ROTATE; | |
247 | } | |
248 | else if (*list->word->word == '-') | |
249 | { | |
7117c2d2 | 250 | sh_invalidopt (list->word->word); |
ccc6cda3 | 251 | builtin_usage (); |
ac50fbac | 252 | return (EX_USAGE); |
ccc6cda3 JA |
253 | } |
254 | else | |
255 | break; | |
256 | } | |
257 | ||
258 | if (flags & ROTATE) | |
259 | { | |
260 | /* Rotate the stack num times. Remember, the current | |
261 | directory acts like it is part of the stack. */ | |
262 | temp = get_working_directory ("pushd"); | |
263 | ||
264 | if (num == 0) | |
265 | { | |
266 | j = ((flags & NOCD) == 0) ? change_to_temp (temp) : EXECUTION_SUCCESS; | |
267 | free (temp); | |
268 | return j; | |
269 | } | |
270 | ||
271 | do | |
272 | { | |
273 | top = pushd_directory_list[directory_list_offset - 1]; | |
274 | ||
275 | for (j = directory_list_offset - 2; j > -1; j--) | |
276 | pushd_directory_list[j + 1] = pushd_directory_list[j]; | |
277 | ||
278 | pushd_directory_list[j + 1] = temp; | |
279 | ||
280 | temp = top; | |
281 | num--; | |
282 | } | |
283 | while (num); | |
284 | ||
285 | j = ((flags & NOCD) == 0) ? change_to_temp (temp) : EXECUTION_SUCCESS; | |
286 | free (temp); | |
287 | return j; | |
288 | } | |
289 | ||
290 | if (list == 0) | |
291 | return (EXECUTION_SUCCESS); | |
292 | ||
293 | /* Change to the directory in list->word->word. Save the current | |
294 | directory on the top of the stack. */ | |
295 | current_directory = get_working_directory ("pushd"); | |
296 | if (current_directory == 0) | |
297 | return (EXECUTION_FAILURE); | |
298 | ||
95732b49 | 299 | j = ((flags & NOCD) == 0) ? cd_builtin (skipopt ? orig_list : list) : EXECUTION_SUCCESS; |
ccc6cda3 JA |
300 | if (j == EXECUTION_SUCCESS) |
301 | { | |
302 | add_dirstack_element ((flags & NOCD) ? savestring (list->word->word) : current_directory); | |
303 | dirs_builtin ((WORD_LIST *)NULL); | |
d166f048 JA |
304 | if (flags & NOCD) |
305 | free (current_directory); | |
ccc6cda3 JA |
306 | return (EXECUTION_SUCCESS); |
307 | } | |
308 | else | |
309 | { | |
310 | free (current_directory); | |
311 | return (EXECUTION_FAILURE); | |
312 | } | |
313 | } | |
314 | ||
315 | /* Pop the directory stack, and then change to the new top of the stack. | |
316 | If LIST is non-null it should consist of a word +N or -N, which says | |
317 | what element to delete from the stack. The default is the top one. */ | |
318 | int | |
319 | popd_builtin (list) | |
320 | WORD_LIST *list; | |
321 | { | |
322 | register int i; | |
7117c2d2 | 323 | intmax_t which; |
ccc6cda3 JA |
324 | int flags; |
325 | char direction; | |
d166f048 | 326 | char *which_word; |
ccc6cda3 | 327 | |
a0c0a00f CR |
328 | CHECK_HELPOPT (list); |
329 | ||
d166f048 | 330 | which_word = (char *)NULL; |
f73dda09 | 331 | for (flags = 0, which = 0, direction = '+'; list; list = list->next) |
ccc6cda3 JA |
332 | { |
333 | if (ISOPTION (list->word->word, 'n')) | |
28ef6c31 JA |
334 | { |
335 | flags |= NOCD; | |
336 | } | |
ccc6cda3 | 337 | else if (ISOPTION (list->word->word, '-')) |
28ef6c31 JA |
338 | { |
339 | list = list->next; | |
340 | break; | |
341 | } | |
ccc6cda3 JA |
342 | else if (((direction = list->word->word[0]) == '+') || direction == '-') |
343 | { | |
344 | if (legal_number (list->word->word + 1, &which) == 0) | |
345 | { | |
7117c2d2 | 346 | sh_invalidnum (list->word->word); |
ccc6cda3 | 347 | builtin_usage (); |
ac50fbac | 348 | return (EX_USAGE); |
ccc6cda3 | 349 | } |
d166f048 | 350 | which_word = list->word->word; |
ccc6cda3 JA |
351 | } |
352 | else if (*list->word->word == '-') | |
353 | { | |
7117c2d2 | 354 | sh_invalidopt (list->word->word); |
ccc6cda3 | 355 | builtin_usage (); |
ac50fbac CR |
356 | return (EX_USAGE); |
357 | } | |
358 | else if (*list->word->word) | |
359 | { | |
360 | builtin_error (_("%s: invalid argument"), list->word->word); | |
361 | builtin_usage (); | |
362 | return (EX_USAGE); | |
ccc6cda3 JA |
363 | } |
364 | else | |
365 | break; | |
366 | } | |
367 | ||
44bfefc5 | 368 | if (which > directory_list_offset || (which < -directory_list_offset) || (directory_list_offset == 0 && which == 0)) |
ccc6cda3 | 369 | { |
d166f048 | 370 | pushd_error (directory_list_offset, which_word ? which_word : ""); |
ccc6cda3 JA |
371 | return (EXECUTION_FAILURE); |
372 | } | |
373 | ||
374 | /* Handle case of no specification, or top of stack specification. */ | |
375 | if ((direction == '+' && which == 0) || | |
376 | (direction == '-' && which == directory_list_offset)) | |
377 | { | |
378 | i = ((flags & NOCD) == 0) ? cd_to_string (pushd_directory_list[directory_list_offset - 1]) | |
28ef6c31 | 379 | : EXECUTION_SUCCESS; |
ccc6cda3 JA |
380 | if (i != EXECUTION_SUCCESS) |
381 | return (i); | |
382 | free (pushd_directory_list[--directory_list_offset]); | |
383 | } | |
384 | else | |
385 | { | |
386 | /* Since an offset other than the top directory was specified, | |
387 | remove that directory from the list and shift the remainder | |
388 | of the list into place. */ | |
389 | i = (direction == '+') ? directory_list_offset - which : which; | |
44bfefc5 CR |
390 | if (i < 0 || i > directory_list_offset) |
391 | { | |
392 | pushd_error (directory_list_offset, which_word ? which_word : ""); | |
393 | return (EXECUTION_FAILURE); | |
394 | } | |
ccc6cda3 JA |
395 | free (pushd_directory_list[i]); |
396 | directory_list_offset--; | |
397 | ||
398 | /* Shift the remainder of the list into place. */ | |
399 | for (; i < directory_list_offset; i++) | |
400 | pushd_directory_list[i] = pushd_directory_list[i + 1]; | |
401 | } | |
402 | ||
403 | dirs_builtin ((WORD_LIST *)NULL); | |
404 | return (EXECUTION_SUCCESS); | |
405 | } | |
406 | ||
407 | /* Print the current list of directories on the directory stack. */ | |
408 | int | |
409 | dirs_builtin (list) | |
410 | WORD_LIST *list; | |
411 | { | |
412 | int flags, desired_index, index_flag, vflag; | |
7117c2d2 | 413 | intmax_t i; |
ccc6cda3 JA |
414 | char *temp, *w; |
415 | ||
a0c0a00f | 416 | CHECK_HELPOPT (list); |
ccc6cda3 JA |
417 | for (flags = vflag = index_flag = 0, desired_index = -1, w = ""; list; list = list->next) |
418 | { | |
419 | if (ISOPTION (list->word->word, 'l')) | |
420 | { | |
421 | flags |= LONGFORM; | |
422 | } | |
423 | else if (ISOPTION (list->word->word, 'c')) | |
424 | { | |
425 | flags |= CLEARSTAK; | |
426 | } | |
427 | else if (ISOPTION (list->word->word, 'v')) | |
428 | { | |
429 | vflag |= 2; | |
430 | } | |
431 | else if (ISOPTION (list->word->word, 'p')) | |
432 | { | |
433 | vflag |= 1; | |
434 | } | |
435 | else if (ISOPTION (list->word->word, '-')) | |
28ef6c31 JA |
436 | { |
437 | list = list->next; | |
438 | break; | |
439 | } | |
ccc6cda3 | 440 | else if (*list->word->word == '+' || *list->word->word == '-') |
28ef6c31 JA |
441 | { |
442 | int sign; | |
443 | if (legal_number (w = list->word->word + 1, &i) == 0) | |
ccc6cda3 | 444 | { |
7117c2d2 | 445 | sh_invalidnum (list->word->word); |
ccc6cda3 | 446 | builtin_usage (); |
ac50fbac | 447 | return (EX_USAGE); |
ccc6cda3 JA |
448 | } |
449 | sign = (*list->word->word == '+') ? 1 : -1; | |
450 | desired_index = get_dirstack_index (i, sign, &index_flag); | |
451 | } | |
452 | else | |
453 | { | |
7117c2d2 | 454 | sh_invalidopt (list->word->word); |
ccc6cda3 | 455 | builtin_usage (); |
ac50fbac | 456 | return (EX_USAGE); |
ccc6cda3 JA |
457 | } |
458 | } | |
459 | ||
460 | if (flags & CLEARSTAK) | |
461 | { | |
462 | clear_directory_stack (); | |
463 | return (EXECUTION_SUCCESS); | |
464 | } | |
465 | ||
466 | if (index_flag && (desired_index < 0 || desired_index > directory_list_offset)) | |
467 | { | |
468 | pushd_error (directory_list_offset, w); | |
469 | return (EXECUTION_FAILURE); | |
470 | } | |
471 | ||
472 | #define DIRSTACK_FORMAT(temp) \ | |
473 | (flags & LONGFORM) ? temp : polite_directory_format (temp) | |
474 | ||
475 | /* The first directory printed is always the current working directory. */ | |
476 | if (index_flag == 0 || (index_flag == 1 && desired_index == 0)) | |
477 | { | |
478 | temp = get_working_directory ("dirs"); | |
479 | if (temp == 0) | |
b80f6443 | 480 | temp = savestring (_("<no current directory>")); |
ccc6cda3 JA |
481 | if (vflag & 2) |
482 | printf ("%2d %s", 0, DIRSTACK_FORMAT (temp)); | |
483 | else | |
484 | printf ("%s", DIRSTACK_FORMAT (temp)); | |
485 | free (temp); | |
486 | if (index_flag) | |
487 | { | |
488 | putchar ('\n'); | |
3185942a | 489 | return (sh_chkwrite (EXECUTION_SUCCESS)); |
ccc6cda3 JA |
490 | } |
491 | } | |
492 | ||
493 | #define DIRSTACK_ENTRY(i) \ | |
494 | (flags & LONGFORM) ? pushd_directory_list[i] \ | |
495 | : polite_directory_format (pushd_directory_list[i]) | |
496 | ||
497 | /* Now print the requested directory stack entries. */ | |
498 | if (index_flag) | |
499 | { | |
500 | if (vflag & 2) | |
501 | printf ("%2d %s", directory_list_offset - desired_index, | |
502 | DIRSTACK_ENTRY (desired_index)); | |
503 | else | |
504 | printf ("%s", DIRSTACK_ENTRY (desired_index)); | |
505 | } | |
506 | else | |
507 | for (i = directory_list_offset - 1; i >= 0; i--) | |
508 | if (vflag >= 2) | |
509 | printf ("\n%2d %s", directory_list_offset - (int)i, DIRSTACK_ENTRY (i)); | |
510 | else | |
511 | printf ("%s%s", (vflag & 1) ? "\n" : " ", DIRSTACK_ENTRY (i)); | |
512 | ||
513 | putchar ('\n'); | |
3185942a JA |
514 | |
515 | return (sh_chkwrite (EXECUTION_SUCCESS)); | |
ccc6cda3 JA |
516 | } |
517 | ||
518 | static void | |
519 | pushd_error (offset, arg) | |
520 | int offset; | |
521 | char *arg; | |
522 | { | |
523 | if (offset == 0) | |
3185942a | 524 | builtin_error (_("directory stack empty")); |
ccc6cda3 | 525 | else |
3185942a | 526 | sh_erange (arg, _("directory stack index")); |
ccc6cda3 JA |
527 | } |
528 | ||
529 | static void | |
530 | clear_directory_stack () | |
531 | { | |
532 | register int i; | |
533 | ||
534 | for (i = 0; i < directory_list_offset; i++) | |
535 | free (pushd_directory_list[i]); | |
536 | directory_list_offset = 0; | |
537 | } | |
538 | ||
539 | /* Switch to the directory in NAME. This uses the cd_builtin to do the work, | |
540 | so if the result is EXECUTION_FAILURE then an error message has already | |
541 | been printed. */ | |
542 | static int | |
543 | cd_to_string (name) | |
544 | char *name; | |
545 | { | |
546 | WORD_LIST *tlist; | |
95732b49 | 547 | WORD_LIST *dir; |
ccc6cda3 JA |
548 | int result; |
549 | ||
95732b49 JA |
550 | dir = make_word_list (make_word (name), NULL); |
551 | tlist = make_word_list (make_word ("--"), dir); | |
ccc6cda3 JA |
552 | result = cd_builtin (tlist); |
553 | dispose_words (tlist); | |
554 | return (result); | |
555 | } | |
556 | ||
557 | static int | |
558 | change_to_temp (temp) | |
559 | char *temp; | |
560 | { | |
561 | int tt; | |
562 | ||
563 | tt = temp ? cd_to_string (temp) : EXECUTION_FAILURE; | |
564 | ||
565 | if (tt == EXECUTION_SUCCESS) | |
566 | dirs_builtin ((WORD_LIST *)NULL); | |
567 | ||
568 | return (tt); | |
569 | } | |
570 | ||
571 | static void | |
572 | add_dirstack_element (dir) | |
573 | char *dir; | |
574 | { | |
ccc6cda3 | 575 | if (directory_list_offset == directory_list_size) |
7117c2d2 | 576 | pushd_directory_list = strvec_resize (pushd_directory_list, directory_list_size += 10); |
ccc6cda3 JA |
577 | pushd_directory_list[directory_list_offset++] = dir; |
578 | } | |
579 | ||
580 | static int | |
581 | get_dirstack_index (ind, sign, indexp) | |
7117c2d2 | 582 | intmax_t ind; |
f73dda09 | 583 | int sign, *indexp; |
ccc6cda3 JA |
584 | { |
585 | if (indexp) | |
586 | *indexp = sign > 0 ? 1 : 2; | |
587 | ||
588 | /* dirs +0 prints the current working directory. */ | |
589 | /* dirs -0 prints last element in directory stack */ | |
590 | if (ind == 0 && sign > 0) | |
591 | return 0; | |
592 | else if (ind == directory_list_offset) | |
593 | { | |
594 | if (indexp) | |
595 | *indexp = sign > 0 ? 2 : 1; | |
596 | return 0; | |
597 | } | |
f73dda09 | 598 | else if (ind >= 0 && ind <= directory_list_offset) |
ccc6cda3 | 599 | return (sign > 0 ? directory_list_offset - ind : ind); |
f73dda09 JA |
600 | else |
601 | return -1; | |
ccc6cda3 JA |
602 | } |
603 | ||
cce855bc JA |
604 | /* Used by the tilde expansion code. */ |
605 | char * | |
606 | get_dirstack_from_string (string) | |
607 | char *string; | |
608 | { | |
609 | int ind, sign, index_flag; | |
7117c2d2 | 610 | intmax_t i; |
cce855bc JA |
611 | |
612 | sign = 1; | |
613 | if (*string == '-' || *string == '+') | |
614 | { | |
615 | sign = (*string == '-') ? -1 : 1; | |
616 | string++; | |
617 | } | |
618 | if (legal_number (string, &i) == 0) | |
619 | return ((char *)NULL); | |
620 | ||
621 | index_flag = 0; | |
622 | ind = get_dirstack_index (i, sign, &index_flag); | |
623 | if (index_flag && (ind < 0 || ind > directory_list_offset)) | |
624 | return ((char *)NULL); | |
625 | if (index_flag == 0 || (index_flag == 1 && ind == 0)) | |
626 | return (get_string_value ("PWD")); | |
627 | else | |
628 | return (pushd_directory_list[ind]); | |
629 | } | |
630 | ||
631 | #ifdef INCLUDE_UNUSED | |
ccc6cda3 JA |
632 | char * |
633 | get_dirstack_element (ind, sign) | |
7117c2d2 | 634 | intmax_t ind; |
f73dda09 | 635 | int sign; |
ccc6cda3 JA |
636 | { |
637 | int i; | |
638 | ||
639 | i = get_dirstack_index (ind, sign, (int *)NULL); | |
640 | return (i < 0 || i > directory_list_offset) ? (char *)NULL | |
641 | : pushd_directory_list[i]; | |
642 | } | |
cce855bc | 643 | #endif |
ccc6cda3 JA |
644 | |
645 | void | |
646 | set_dirstack_element (ind, sign, value) | |
7117c2d2 | 647 | intmax_t ind; |
f73dda09 | 648 | int sign; |
ccc6cda3 JA |
649 | char *value; |
650 | { | |
651 | int i; | |
652 | ||
653 | i = get_dirstack_index (ind, sign, (int *)NULL); | |
654 | if (ind == 0 || i < 0 || i > directory_list_offset) | |
655 | return; | |
656 | free (pushd_directory_list[i]); | |
657 | pushd_directory_list[i] = savestring (value); | |
658 | } | |
659 | ||
660 | WORD_LIST * | |
0628567a JA |
661 | get_directory_stack (flags) |
662 | int flags; | |
ccc6cda3 JA |
663 | { |
664 | register int i; | |
665 | WORD_LIST *ret; | |
666 | char *d, *t; | |
667 | ||
668 | for (ret = (WORD_LIST *)NULL, i = 0; i < directory_list_offset; i++) | |
669 | { | |
0628567a JA |
670 | d = (flags&1) ? polite_directory_format (pushd_directory_list[i]) |
671 | : pushd_directory_list[i]; | |
ccc6cda3 JA |
672 | ret = make_word_list (make_word (d), ret); |
673 | } | |
674 | /* Now the current directory. */ | |
675 | d = get_working_directory ("dirstack"); | |
676 | i = 0; /* sentinel to decide whether or not to free d */ | |
677 | if (d == 0) | |
678 | d = "."; | |
679 | else | |
680 | { | |
d233b485 | 681 | t = (flags&1) ? polite_directory_format (d) : d; |
ccc6cda3 JA |
682 | /* polite_directory_format sometimes returns its argument unchanged. |
683 | If it does not, we can free d right away. If it does, we need to | |
684 | mark d to be deleted later. */ | |
685 | if (t != d) | |
686 | { | |
687 | free (d); | |
688 | d = t; | |
689 | } | |
690 | else /* t == d, so d is what we want */ | |
691 | i = 1; | |
692 | } | |
693 | ret = make_word_list (make_word (d), ret); | |
694 | if (i) | |
695 | free (d); | |
696 | return ret; /* was (REVERSE_LIST (ret, (WORD_LIST *)); */ | |
697 | } | |
b72432fd JA |
698 | |
699 | #ifdef LOADABLE_BUILTIN | |
0628567a | 700 | char * const dirs_doc[] = { |
3185942a JA |
701 | N_("Display the list of currently remembered directories. Directories\n\ |
702 | find their way onto the list with the `pushd' command; you can get\n\ | |
703 | back up through the list with the `popd' command.\n\ | |
704 | \n\ | |
705 | Options:\n\ | |
706 | -c clear the directory stack by deleting all of the elements\n\ | |
707 | -l do not print tilde-prefixed versions of directories relative\n\ | |
708 | to your home directory\n\ | |
709 | -p print the directory stack with one entry per line\n\ | |
710 | -v print the directory stack with one entry per line prefixed\n\ | |
711 | with its position in the stack\n\ | |
712 | \n\ | |
713 | Arguments:\n\ | |
714 | +N Displays the Nth entry counting from the left of the list shown by\n\ | |
715 | dirs when invoked without options, starting with zero.\n\ | |
716 | \n\ | |
717 | -N Displays the Nth entry counting from the right of the list shown by\n\ | |
718 | dirs when invoked without options, starting with zero."), | |
b72432fd JA |
719 | (char *)NULL |
720 | }; | |
721 | ||
0628567a | 722 | char * const pushd_doc[] = { |
3185942a JA |
723 | N_("Adds a directory to the top of the directory stack, or rotates\n\ |
724 | the stack, making the new top of the stack the current working\n\ | |
725 | directory. With no arguments, exchanges the top two directories.\n\ | |
726 | \n\ | |
727 | Options:\n\ | |
728 | -n Suppresses the normal change of directory when adding\n\ | |
729 | directories to the stack, so only the stack is manipulated.\n\ | |
730 | \n\ | |
731 | Arguments:\n\ | |
732 | +N Rotates the stack so that the Nth directory (counting\n\ | |
733 | from the left of the list shown by `dirs', starting with\n\ | |
734 | zero) is at the top.\n\ | |
735 | \n\ | |
736 | -N Rotates the stack so that the Nth directory (counting\n\ | |
737 | from the right of the list shown by `dirs', starting with\n\ | |
738 | zero) is at the top.\n\ | |
739 | \n\ | |
740 | dir Adds DIR to the directory stack at the top, making it the\n\ | |
741 | new current working directory.\n\ | |
742 | \n\ | |
743 | The `dirs' builtin displays the directory stack."), | |
b72432fd JA |
744 | (char *)NULL |
745 | }; | |
746 | ||
0628567a | 747 | char * const popd_doc[] = { |
3185942a JA |
748 | N_("Removes entries from the directory stack. With no arguments, removes\n\ |
749 | the top directory from the stack, and changes to the new top directory.\n\ | |
750 | \n\ | |
751 | Options:\n\ | |
752 | -n Suppresses the normal change of directory when removing\n\ | |
753 | directories from the stack, so only the stack is manipulated.\n\ | |
754 | \n\ | |
755 | Arguments:\n\ | |
756 | +N Removes the Nth entry counting from the left of the list\n\ | |
757 | shown by `dirs', starting with zero. For example: `popd +0'\n\ | |
758 | removes the first directory, `popd +1' the second.\n\ | |
759 | \n\ | |
760 | -N Removes the Nth entry counting from the right of the list\n\ | |
761 | shown by `dirs', starting with zero. For example: `popd -0'\n\ | |
762 | removes the last directory, `popd -1' the next to last.\n\ | |
763 | \n\ | |
764 | The `dirs' builtin displays the directory stack."), | |
b72432fd JA |
765 | (char *)NULL |
766 | }; | |
767 | ||
768 | struct builtin pushd_struct = { | |
769 | "pushd", | |
770 | pushd_builtin, | |
771 | BUILTIN_ENABLED, | |
772 | pushd_doc, | |
773 | "pushd [+N | -N] [-n] [dir]", | |
774 | 0 | |
775 | }; | |
776 | ||
777 | struct builtin popd_struct = { | |
778 | "popd", | |
779 | popd_builtin, | |
780 | BUILTIN_ENABLED, | |
781 | popd_doc, | |
782 | "popd [+N | -N] [-n]", | |
783 | 0 | |
784 | }; | |
785 | ||
786 | struct builtin dirs_struct = { | |
787 | "dirs", | |
788 | dirs_builtin, | |
789 | BUILTIN_ENABLED, | |
790 | dirs_doc, | |
791 | "dirs [-clpv] [+N] [-N]", | |
792 | 0 | |
793 | }; | |
794 | #endif /* LOADABLE_BUILTIN */ | |
795 | ||
ccc6cda3 | 796 | #endif /* PUSHD_AND_POPD */ |