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14d55bce RS |
1 | /* Lisp functions for making directory listings. |
2 | Copyright (C) 1985, 1986 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 1, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | ||
21 | #include <stdio.h> | |
22 | #include <sys/types.h> | |
23 | #include <sys/stat.h> | |
24 | ||
25 | #include "config.h" | |
26 | ||
27 | #ifdef SYSV_SYSTEM_DIR | |
28 | ||
29 | #include <dirent.h> | |
30 | #define DIRENTRY struct dirent | |
31 | #define NAMLEN(p) strlen (p->d_name) | |
32 | ||
33 | #else | |
34 | ||
35 | #ifdef NONSYSTEM_DIR_LIBRARY | |
36 | #include "ndir.h" | |
37 | #else /* not NONSYSTEM_DIR_LIBRARY */ | |
38 | #include <sys/dir.h> | |
39 | #endif /* not NONSYSTEM_DIR_LIBRARY */ | |
40 | ||
41 | #define DIRENTRY struct direct | |
42 | #define NAMLEN(p) p->d_namlen | |
43 | ||
44 | extern DIR *opendir (); | |
45 | extern struct direct *readdir (); | |
46 | ||
47 | #endif | |
48 | ||
14d55bce RS |
49 | #include "lisp.h" |
50 | #include "buffer.h" | |
51 | #include "commands.h" | |
52 | ||
53 | #include "regex.h" | |
14d55bce RS |
54 | |
55 | #define min(a, b) ((a) < (b) ? (a) : (b)) | |
56 | ||
57 | /* if system does not have symbolic links, it does not have lstat. | |
58 | In that case, use ordinary stat instead. */ | |
59 | ||
60 | #ifndef S_IFLNK | |
61 | #define lstat stat | |
62 | #endif | |
63 | ||
64 | Lisp_Object Vcompletion_ignored_extensions; | |
65 | ||
66 | Lisp_Object Qcompletion_ignore_case; | |
32f4334d RS |
67 | |
68 | Lisp_Object Qdirectory_files; | |
69 | Lisp_Object Qfile_name_completion; | |
70 | Lisp_Object Qfile_name_all_completions; | |
434e6714 | 71 | Lisp_Object Qfile_attributes; |
14d55bce RS |
72 | \f |
73 | DEFUN ("directory-files", Fdirectory_files, Sdirectory_files, 1, 4, 0, | |
74 | "Return a list of names of files in DIRECTORY.\n\ | |
75 | There are three optional arguments:\n\ | |
76 | If FULL is non-nil, absolute pathnames of the files are returned.\n\ | |
77 | If MATCH is non-nil, only pathnames containing that regexp are returned.\n\ | |
78 | If NOSORT is non-nil, the list is not sorted--its order is unpredictable.\n\ | |
79 | NOSORT is useful if you plan to sort the result yourself.") | |
80 | (dirname, full, match, nosort) | |
81 | Lisp_Object dirname, full, match, nosort; | |
82 | { | |
83 | DIR *d; | |
84 | int length; | |
85 | Lisp_Object list, name; | |
32f4334d RS |
86 | Lisp_Object handler; |
87 | ||
88 | /* If the file name has special constructs in it, | |
89 | call the corresponding file handler. */ | |
434e6714 | 90 | handler = find_file_handler (dirname); |
32f4334d RS |
91 | if (!NILP (handler)) |
92 | { | |
93 | Lisp_Object args[6]; | |
94 | ||
95 | args[0] = handler; | |
96 | args[1] = Qdirectory_files; | |
97 | args[2] = dirname; | |
98 | args[3] = full; | |
99 | args[4] = match; | |
100 | args[5] = nosort; | |
101 | return Ffuncall (6, args); | |
102 | } | |
14d55bce | 103 | |
265a9e55 | 104 | if (!NILP (match)) |
14d55bce RS |
105 | { |
106 | CHECK_STRING (match, 3); | |
ebb9e16f JB |
107 | |
108 | /* MATCH might be a flawed regular expression. Rather than | |
109 | catching and signalling our own errors, we just call | |
110 | compile_pattern to do the work for us. */ | |
14d55bce | 111 | #ifdef VMS |
ebb9e16f | 112 | compile_pattern (match, &searchbuf, 0 |
14d55bce RS |
113 | buffer_defaults.downcase_table->contents); |
114 | #else | |
ebb9e16f | 115 | compile_pattern (match, &searchbuf, 0, 0); |
14d55bce RS |
116 | #endif |
117 | } | |
118 | ||
119 | dirname = Fexpand_file_name (dirname, Qnil); | |
120 | if (!(d = opendir (XSTRING (Fdirectory_file_name (dirname))->data))) | |
121 | report_file_error ("Opening directory", Fcons (dirname, Qnil)); | |
122 | ||
123 | list = Qnil; | |
124 | length = XSTRING (dirname)->size; | |
125 | ||
126 | /* Loop reading blocks */ | |
127 | while (1) | |
128 | { | |
129 | DIRENTRY *dp = readdir (d); | |
130 | int len; | |
131 | ||
132 | if (!dp) break; | |
133 | len = NAMLEN (dp); | |
134 | if (dp->d_ino) | |
135 | { | |
265a9e55 | 136 | if (NILP (match) |
14d55bce RS |
137 | || (0 <= re_search (&searchbuf, dp->d_name, len, 0, len, 0))) |
138 | { | |
265a9e55 | 139 | if (!NILP (full)) |
14d55bce RS |
140 | { |
141 | int index = XSTRING (dirname)->size; | |
142 | int total = len + index; | |
143 | #ifndef VMS | |
144 | if (length == 0 | |
145 | || XSTRING (dirname)->data[length - 1] != '/') | |
146 | total++; | |
147 | #endif /* VMS */ | |
148 | ||
149 | name = make_uninit_string (total); | |
150 | bcopy (XSTRING (dirname)->data, XSTRING (name)->data, | |
151 | index); | |
152 | #ifndef VMS | |
153 | if (length == 0 | |
154 | || XSTRING (dirname)->data[length - 1] != '/') | |
155 | XSTRING (name)->data[index++] = '/'; | |
156 | #endif /* VMS */ | |
157 | bcopy (dp->d_name, XSTRING (name)->data + index, len); | |
158 | } | |
159 | else | |
160 | name = make_string (dp->d_name, len); | |
161 | list = Fcons (name, list); | |
162 | } | |
163 | } | |
164 | } | |
165 | closedir (d); | |
265a9e55 | 166 | if (!NILP (nosort)) |
14d55bce RS |
167 | return list; |
168 | return Fsort (Fnreverse (list), Qstring_lessp); | |
169 | } | |
170 | \f | |
171 | Lisp_Object file_name_completion (); | |
172 | ||
173 | DEFUN ("file-name-completion", Ffile_name_completion, Sfile_name_completion, | |
174 | 2, 2, 0, | |
175 | "Complete file name FILE in directory DIR.\n\ | |
176 | Returns the longest string\n\ | |
177 | common to all filenames in DIR that start with FILE.\n\ | |
178 | If there is only one and FILE matches it exactly, returns t.\n\ | |
179 | Returns nil if DIR contains no name starting with FILE.") | |
180 | (file, dirname) | |
181 | Lisp_Object file, dirname; | |
182 | { | |
32f4334d | 183 | Lisp_Object handler; |
14d55bce RS |
184 | /* Don't waste time trying to complete a null string. |
185 | Besides, this case happens when user is being asked for | |
186 | a directory name and has supplied one ending in a /. | |
187 | We would not want to add anything in that case | |
188 | even if there are some unique characters in that directory. */ | |
189 | if (XTYPE (file) == Lisp_String && XSTRING (file)->size == 0) | |
190 | return file; | |
32f4334d RS |
191 | |
192 | /* If the file name has special constructs in it, | |
193 | call the corresponding file handler. */ | |
434e6714 | 194 | handler = find_file_handler (dirname); |
32f4334d RS |
195 | if (!NILP (handler)) |
196 | return call3 (handler, Qfile_name_completion, file, dirname); | |
197 | ||
14d55bce RS |
198 | return file_name_completion (file, dirname, 0, 0); |
199 | } | |
200 | ||
201 | DEFUN ("file-name-all-completions", Ffile_name_all_completions, | |
202 | Sfile_name_all_completions, 2, 2, 0, | |
203 | "Return a list of all completions of file name FILE in directory DIR.\n\ | |
204 | These are all file names in directory DIR which begin with FILE.") | |
205 | (file, dirname) | |
206 | Lisp_Object file, dirname; | |
207 | { | |
32f4334d RS |
208 | Lisp_Object handler; |
209 | ||
210 | /* If the file name has special constructs in it, | |
211 | call the corresponding file handler. */ | |
434e6714 | 212 | handler = find_file_handler (dirname); |
32f4334d RS |
213 | if (!NILP (handler)) |
214 | return call3 (handler, Qfile_name_all_completions, file, dirname); | |
215 | ||
14d55bce RS |
216 | return file_name_completion (file, dirname, 1, 0); |
217 | } | |
218 | ||
219 | #ifdef VMS | |
220 | ||
221 | DEFUN ("file-name-all-versions", Ffile_name_all_versions, | |
222 | Sfile_name_all_versions, 2, 2, 0, | |
223 | "Return a list of all versions of file name FILE in directory DIR.") | |
224 | (file, dirname) | |
225 | Lisp_Object file, dirname; | |
226 | { | |
227 | return file_name_completion (file, dirname, 1, 1); | |
228 | } | |
229 | ||
230 | #endif /* VMS */ | |
231 | ||
232 | Lisp_Object | |
233 | file_name_completion (file, dirname, all_flag, ver_flag) | |
234 | Lisp_Object file, dirname; | |
235 | int all_flag, ver_flag; | |
236 | { | |
237 | DIR *d; | |
238 | DIRENTRY *dp; | |
239 | int bestmatchsize, skip; | |
240 | register int compare, matchsize; | |
241 | unsigned char *p1, *p2; | |
242 | int matchcount = 0; | |
243 | Lisp_Object bestmatch, tem, elt, name; | |
244 | struct stat st; | |
245 | int directoryp; | |
246 | int passcount; | |
247 | int count = specpdl_ptr - specpdl; | |
248 | #ifdef VMS | |
249 | extern DIRENTRY * readdirver (); | |
250 | ||
251 | DIRENTRY *((* readfunc) ()); | |
252 | ||
253 | /* Filename completion on VMS ignores case, since VMS filesys does. */ | |
254 | specbind (Qcompletion_ignore_case, Qt); | |
255 | ||
256 | readfunc = readdir; | |
257 | if (ver_flag) | |
258 | readfunc = readdirver; | |
259 | file = Fupcase (file); | |
260 | #else /* not VMS */ | |
261 | CHECK_STRING (file, 0); | |
262 | #endif /* not VMS */ | |
263 | ||
264 | dirname = Fexpand_file_name (dirname, Qnil); | |
265 | bestmatch = Qnil; | |
266 | ||
267 | /* With passcount = 0, ignore files that end in an ignored extension. | |
268 | If nothing found then try again with passcount = 1, don't ignore them. | |
269 | If looking for all completions, start with passcount = 1, | |
270 | so always take even the ignored ones. | |
271 | ||
272 | ** It would not actually be helpful to the user to ignore any possible | |
273 | completions when making a list of them.** */ | |
274 | ||
265a9e55 | 275 | for (passcount = !!all_flag; NILP (bestmatch) && passcount < 2; passcount++) |
14d55bce RS |
276 | { |
277 | if (!(d = opendir (XSTRING (Fdirectory_file_name (dirname))->data))) | |
278 | report_file_error ("Opening directory", Fcons (dirname, Qnil)); | |
279 | ||
280 | /* Loop reading blocks */ | |
281 | /* (att3b compiler bug requires do a null comparison this way) */ | |
282 | while (1) | |
283 | { | |
284 | DIRENTRY *dp; | |
285 | int len; | |
286 | ||
287 | #ifdef VMS | |
288 | dp = (*readfunc) (d); | |
289 | #else | |
290 | dp = readdir (d); | |
291 | #endif | |
292 | if (!dp) break; | |
293 | ||
294 | len = NAMLEN (dp); | |
295 | ||
265a9e55 | 296 | if (!NILP (Vquit_flag) && NILP (Vinhibit_quit)) |
14d55bce RS |
297 | goto quit; |
298 | if (!dp->d_ino | |
299 | || len < XSTRING (file)->size | |
300 | || 0 <= scmp (dp->d_name, XSTRING (file)->data, | |
301 | XSTRING (file)->size)) | |
302 | continue; | |
303 | ||
304 | if (file_name_completion_stat (dirname, dp, &st) < 0) | |
305 | continue; | |
306 | ||
307 | directoryp = ((st.st_mode & S_IFMT) == S_IFDIR); | |
308 | tem = Qnil; | |
309 | if (!directoryp) | |
310 | { | |
311 | /* Compare extensions-to-be-ignored against end of this file name */ | |
312 | /* if name is not an exact match against specified string */ | |
313 | if (!passcount && len > XSTRING (file)->size) | |
314 | /* and exit this for loop if a match is found */ | |
315 | for (tem = Vcompletion_ignored_extensions; | |
316 | CONSP (tem); tem = XCONS (tem)->cdr) | |
317 | { | |
318 | elt = XCONS (tem)->car; | |
319 | if (XTYPE (elt) != Lisp_String) continue; | |
320 | skip = len - XSTRING (elt)->size; | |
321 | if (skip < 0) continue; | |
322 | ||
323 | if (0 <= scmp (dp->d_name + skip, | |
324 | XSTRING (elt)->data, | |
325 | XSTRING (elt)->size)) | |
326 | continue; | |
327 | break; | |
328 | } | |
329 | } | |
330 | ||
331 | /* Unless an ignored-extensions match was found, | |
332 | process this name as a completion */ | |
333 | if (passcount || !CONSP (tem)) | |
334 | { | |
335 | /* Update computation of how much all possible completions match */ | |
336 | ||
337 | matchcount++; | |
338 | ||
265a9e55 | 339 | if (all_flag || NILP (bestmatch)) |
14d55bce RS |
340 | { |
341 | /* This is a possible completion */ | |
342 | if (directoryp) | |
343 | { | |
344 | /* This completion is a directory; make it end with '/' */ | |
345 | name = Ffile_name_as_directory (make_string (dp->d_name, len)); | |
346 | } | |
347 | else | |
348 | name = make_string (dp->d_name, len); | |
349 | if (all_flag) | |
350 | { | |
351 | bestmatch = Fcons (name, bestmatch); | |
352 | } | |
353 | else | |
354 | { | |
355 | bestmatch = name; | |
356 | bestmatchsize = XSTRING (name)->size; | |
357 | } | |
358 | } | |
359 | else | |
360 | { | |
361 | compare = min (bestmatchsize, len); | |
362 | p1 = XSTRING (bestmatch)->data; | |
363 | p2 = (unsigned char *) dp->d_name; | |
364 | matchsize = scmp(p1, p2, compare); | |
365 | if (matchsize < 0) | |
366 | matchsize = compare; | |
367 | /* If this dirname all matches, | |
368 | see if implicit following slash does too. */ | |
369 | if (directoryp | |
370 | && compare == matchsize | |
371 | && bestmatchsize > matchsize | |
372 | && p1[matchsize] == '/') | |
373 | matchsize++; | |
374 | bestmatchsize = min (matchsize, bestmatchsize); | |
375 | } | |
376 | } | |
377 | } | |
378 | closedir (d); | |
379 | } | |
380 | ||
381 | unbind_to (count, Qnil); | |
382 | ||
265a9e55 | 383 | if (all_flag || NILP (bestmatch)) |
14d55bce RS |
384 | return bestmatch; |
385 | if (matchcount == 1 && bestmatchsize == XSTRING (file)->size) | |
386 | return Qt; | |
387 | return Fsubstring (bestmatch, make_number (0), make_number (bestmatchsize)); | |
388 | quit: | |
389 | if (d) closedir (d); | |
390 | Vquit_flag = Qnil; | |
391 | return Fsignal (Qquit, Qnil); | |
392 | } | |
393 | ||
394 | file_name_completion_stat (dirname, dp, st_addr) | |
395 | Lisp_Object dirname; | |
396 | DIRENTRY *dp; | |
397 | struct stat *st_addr; | |
398 | { | |
399 | int len = NAMLEN (dp); | |
400 | int pos = XSTRING (dirname)->size; | |
401 | char *fullname = (char *) alloca (len + pos + 2); | |
402 | ||
403 | bcopy (XSTRING (dirname)->data, fullname, pos); | |
404 | #ifndef VMS | |
405 | if (fullname[pos - 1] != '/') | |
406 | fullname[pos++] = '/'; | |
407 | #endif | |
408 | ||
409 | bcopy (dp->d_name, fullname + pos, len); | |
410 | fullname[pos + len] = 0; | |
411 | ||
412 | return stat (fullname, st_addr); | |
413 | } | |
414 | \f | |
415 | Lisp_Object | |
416 | make_time (time) | |
417 | int time; | |
418 | { | |
419 | return Fcons (make_number (time >> 16), | |
420 | Fcons (make_number (time & 0177777), Qnil)); | |
421 | } | |
422 | ||
423 | DEFUN ("file-attributes", Ffile_attributes, Sfile_attributes, 1, 1, 0, | |
424 | "Return a list of attributes of file FILENAME.\n\ | |
425 | Value is nil if specified file cannot be opened.\n\ | |
426 | Otherwise, list elements are:\n\ | |
427 | 0. t for directory, string (name linked to) for symbolic link, or nil.\n\ | |
428 | 1. Number of links to file.\n\ | |
429 | 2. File uid.\n\ | |
430 | 3. File gid.\n\ | |
431 | 4. Last access time, as a list of two integers.\n\ | |
432 | First integer has high-order 16 bits of time, second has low 16 bits.\n\ | |
433 | 5. Last modification time, likewise.\n\ | |
434 | 6. Last status change time, likewise.\n\ | |
435 | 7. Size in bytes.\n\ | |
436 | 8. File modes, as a string of ten letters or dashes as in ls -l.\n\ | |
437 | 9. t iff file's gid would change if file were deleted and recreated.\n\ | |
438 | 10. inode number.\n\ | |
439 | 11. Device number.\n\ | |
440 | \n\ | |
441 | If file does not exists, returns nil.") | |
442 | (filename) | |
443 | Lisp_Object filename; | |
444 | { | |
445 | Lisp_Object values[12]; | |
446 | Lisp_Object dirname; | |
447 | struct stat s; | |
448 | struct stat sdir; | |
449 | char modes[10]; | |
32f4334d | 450 | Lisp_Object handler; |
14d55bce RS |
451 | |
452 | filename = Fexpand_file_name (filename, Qnil); | |
32f4334d RS |
453 | |
454 | /* If the file name has special constructs in it, | |
455 | call the corresponding file handler. */ | |
456 | handler = find_file_handler (filename); | |
457 | if (!NILP (handler)) | |
458 | return call2 (handler, Qfile_attributes, filename); | |
459 | ||
14d55bce RS |
460 | if (lstat (XSTRING (filename)->data, &s) < 0) |
461 | return Qnil; | |
462 | ||
463 | switch (s.st_mode & S_IFMT) | |
464 | { | |
465 | default: | |
466 | values[0] = Qnil; break; | |
467 | case S_IFDIR: | |
468 | values[0] = Qt; break; | |
469 | #ifdef S_IFLNK | |
470 | case S_IFLNK: | |
471 | values[0] = Ffile_symlink_p (filename); break; | |
472 | #endif | |
473 | } | |
474 | values[1] = make_number (s.st_nlink); | |
475 | values[2] = make_number (s.st_uid); | |
476 | values[3] = make_number (s.st_gid); | |
477 | values[4] = make_time (s.st_atime); | |
478 | values[5] = make_time (s.st_mtime); | |
479 | values[6] = make_time (s.st_ctime); | |
480 | /* perhaps we should set this to most-positive-fixnum if it is too large? */ | |
481 | values[7] = make_number (s.st_size); | |
482 | filemodestring (&s, modes); | |
483 | values[8] = make_string (modes, 10); | |
484 | #ifdef BSD4_3 /* Gross kludge to avoid lack of "#if defined(...)" in VMS */ | |
485 | #define BSD4_2 /* A new meaning to the term `backwards compatability' */ | |
486 | #endif | |
487 | #ifdef BSD4_2 /* file gid will be dir gid */ | |
488 | dirname = Ffile_name_directory (filename); | |
489 | if (dirname != Qnil && stat (XSTRING (dirname)->data, &sdir) == 0) | |
490 | values[9] = (sdir.st_gid != s.st_gid) ? Qt : Qnil; | |
491 | else /* if we can't tell, assume worst */ | |
492 | values[9] = Qt; | |
493 | #else /* file gid will be egid */ | |
494 | values[9] = (s.st_gid != getegid ()) ? Qt : Qnil; | |
495 | #endif /* BSD4_2 (or BSD4_3) */ | |
496 | #ifdef BSD4_3 | |
497 | #undef BSD4_2 /* ok, you can look again without throwing up */ | |
498 | #endif | |
499 | values[10] = make_number (s.st_ino); | |
500 | values[11] = make_number (s.st_dev); | |
501 | return Flist (sizeof(values) / sizeof(values[0]), values); | |
502 | } | |
503 | \f | |
504 | syms_of_dired () | |
505 | { | |
32f4334d RS |
506 | Qdirectory_files = intern ("directory-files"); |
507 | Qfile_name_completion = intern ("file-name-completion"); | |
508 | Qfile_name_all_completions = intern ("file-name-all-completions"); | |
434e6714 | 509 | Qfile_attributes = intern ("file-attributes"); |
32f4334d | 510 | |
14d55bce RS |
511 | defsubr (&Sdirectory_files); |
512 | defsubr (&Sfile_name_completion); | |
513 | #ifdef VMS | |
514 | defsubr (&Sfile_name_all_versions); | |
515 | #endif /* VMS */ | |
516 | defsubr (&Sfile_name_all_completions); | |
517 | defsubr (&Sfile_attributes); | |
518 | ||
519 | #ifdef VMS | |
520 | Qcompletion_ignore_case = intern ("completion-ignore-case"); | |
521 | staticpro (&Qcompletion_ignore_case); | |
522 | #endif /* VMS */ | |
523 | ||
524 | DEFVAR_LISP ("completion-ignored-extensions", &Vcompletion_ignored_extensions, | |
525 | "*Completion ignores filenames ending in any string in this list.\n\ | |
526 | This variable does not affect lists of possible completions,\n\ | |
527 | but does affect the commands that actually do completions."); | |
528 | Vcompletion_ignored_extensions = Qnil; | |
529 | } |