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14d55bce | 1 | /* Lisp functions for making directory listings. |
acaf905b | 2 | Copyright (C) 1985-1986, 1993-1994, 1999-2012 Free Software Foundation, Inc. |
14d55bce RS |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
9ec0b715 | 6 | GNU Emacs is free software: you can redistribute it and/or modify |
14d55bce | 7 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
8 | the Free Software Foundation, either version 3 of the License, or |
9 | (at your option) any later version. | |
14d55bce RS |
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 | |
9ec0b715 | 17 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
14d55bce RS |
18 | |
19 | ||
3964b9a7 RS |
20 | #include <config.h> |
21 | ||
14d55bce RS |
22 | #include <stdio.h> |
23 | #include <sys/types.h> | |
24 | #include <sys/stat.h> | |
25 | ||
5b9c0a1d | 26 | #ifdef HAVE_PWD_H |
6b61353c | 27 | #include <pwd.h> |
5b9c0a1d | 28 | #endif |
6b61353c | 29 | #include <grp.h> |
6b61353c | 30 | |
7cc9f69f | 31 | #include <errno.h> |
dfcf069d | 32 | #include <unistd.h> |
dfcf069d | 33 | |
d6717cdb JB |
34 | /* The d_nameln member of a struct dirent includes the '\0' character |
35 | on some systems, but not on others. What's worse, you can't tell | |
36 | at compile-time which one it will be, since it really depends on | |
37 | the sort of system providing the filesystem you're reading from, | |
38 | not the system you are running on. Paul Eggert | |
39 | <eggert@bi.twinsun.com> says this occurs when Emacs is running on a | |
40 | SunOS 4.1.2 host, reading a directory that is remote-mounted from a | |
41 | Solaris 2.1 host and is in a native Solaris 2.1 filesystem. | |
42 | ||
43 | Since applying strlen to the name always works, we'll just do that. */ | |
44 | #define NAMLEN(p) strlen (p->d_name) | |
45 | ||
1c97e857 | 46 | #ifdef HAVE_DIRENT_H |
14d55bce RS |
47 | |
48 | #include <dirent.h> | |
49 | #define DIRENTRY struct dirent | |
14d55bce | 50 | |
1c97e857 | 51 | #else /* not HAVE_DIRENT_H */ |
14d55bce | 52 | |
14d55bce | 53 | #include <sys/dir.h> |
851cab13 DL |
54 | #include <sys/stat.h> |
55 | ||
14d55bce | 56 | #define DIRENTRY struct direct |
14d55bce | 57 | |
361358ea JB |
58 | extern DIR *opendir (char *); |
59 | extern struct direct *readdir (DIR *); | |
14d55bce | 60 | |
1c97e857 | 61 | #endif /* HAVE_DIRENT_H */ |
128ecc89 | 62 | |
d209feed | 63 | #include <filemode.h> |
d35af63c | 64 | #include <stat-time.h> |
d209feed | 65 | |
9f8c08a7 | 66 | #ifdef MSDOS |
128ecc89 RS |
67 | #define DIRENTRY_NONEMPTY(p) ((p)->d_name[0] != 0) |
68 | #else | |
69 | #define DIRENTRY_NONEMPTY(p) ((p)->d_ino) | |
14d55bce RS |
70 | #endif |
71 | ||
14d55bce | 72 | #include "lisp.h" |
fa8459a3 | 73 | #include "systime.h" |
e5560ff7 | 74 | #include "character.h" |
14d55bce RS |
75 | #include "buffer.h" |
76 | #include "commands.h" | |
bd33479f KH |
77 | #include "charset.h" |
78 | #include "coding.h" | |
14d55bce | 79 | #include "regex.h" |
8c8a7c58 | 80 | #include "blockinput.h" |
14d55bce | 81 | |
955cbe7b PE |
82 | static Lisp_Object Qdirectory_files; |
83 | static Lisp_Object Qdirectory_files_and_attributes; | |
84 | static Lisp_Object Qfile_name_completion; | |
85 | static Lisp_Object Qfile_name_all_completions; | |
86 | static Lisp_Object Qfile_attributes; | |
87 | static Lisp_Object Qfile_attributes_lessp; | |
b3f04ced | 88 | |
d311d28c | 89 | static ptrdiff_t scmp (const char *, const char *, ptrdiff_t); |
14d55bce | 90 | \f |
65156807 EZ |
91 | #ifdef WINDOWSNT |
92 | Lisp_Object | |
93 | directory_files_internal_w32_unwind (Lisp_Object arg) | |
94 | { | |
95 | Vw32_get_true_file_attributes = arg; | |
96 | return Qnil; | |
97 | } | |
98 | #endif | |
2488aba5 | 99 | |
4a6bea26 | 100 | static Lisp_Object |
971de7fb | 101 | directory_files_internal_unwind (Lisp_Object dh) |
2488aba5 | 102 | { |
9d291bdf | 103 | DIR *d = (DIR *) XSAVE_VALUE (dh)->pointer; |
4d7e6e51 | 104 | block_input (); |
2488aba5 | 105 | closedir (d); |
4d7e6e51 | 106 | unblock_input (); |
2488aba5 AI |
107 | return Qnil; |
108 | } | |
109 | ||
177c0ea7 | 110 | /* Function shared by Fdirectory_files and Fdirectory_files_and_attributes. |
de1339b0 PE |
111 | If not ATTRS, return a list of directory filenames; |
112 | if ATTRS, return a list of directory filenames and their attributes. | |
6b61353c | 113 | In the latter case, ID_FORMAT is passed to Ffile_attributes. */ |
f69f9da1 | 114 | |
4424b255 | 115 | Lisp_Object |
de1339b0 PE |
116 | directory_files_internal (Lisp_Object directory, Lisp_Object full, |
117 | Lisp_Object match, Lisp_Object nosort, bool attrs, | |
118 | Lisp_Object id_format) | |
14d55bce RS |
119 | { |
120 | DIR *d; | |
d311d28c | 121 | ptrdiff_t directory_nbytes; |
388ac098 | 122 | Lisp_Object list, dirfilename, encoded_directory; |
6bbd7a29 | 123 | struct re_pattern_buffer *bufp = NULL; |
de1339b0 | 124 | bool needsep = 0; |
d311d28c | 125 | ptrdiff_t count = SPECPDL_INDEX (); |
388ac098 | 126 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
8e42f043 | 127 | DIRENTRY *dp; |
65156807 EZ |
128 | #ifdef WINDOWSNT |
129 | Lisp_Object w32_save = Qnil; | |
130 | #endif | |
32f4334d | 131 | |
96d64004 | 132 | /* Because of file name handlers, these functions might call |
6155fae1 | 133 | Ffuncall, and cause a GC. */ |
388ac098 GM |
134 | list = encoded_directory = dirfilename = Qnil; |
135 | GCPRO5 (match, directory, list, dirfilename, encoded_directory); | |
96d64004 | 136 | dirfilename = Fdirectory_file_name (directory); |
6155fae1 | 137 | |
265a9e55 | 138 | if (!NILP (match)) |
14d55bce | 139 | { |
b7826503 | 140 | CHECK_STRING (match); |
ebb9e16f JB |
141 | |
142 | /* MATCH might be a flawed regular expression. Rather than | |
8e6208c5 | 143 | catching and signaling our own errors, we just call |
ebb9e16f | 144 | compile_pattern to do the work for us. */ |
c872c6b2 RS |
145 | /* Pass 1 for the MULTIBYTE arg |
146 | because we do make multibyte strings if the contents warrant. */ | |
1a9fbabe EZ |
147 | # ifdef WINDOWSNT |
148 | /* Windows users want case-insensitive wildcards. */ | |
149 | bufp = compile_pattern (match, 0, | |
4b4deea2 | 150 | BVAR (&buffer_defaults, case_canon_table), 0, 1); |
1a9fbabe | 151 | # else /* !WINDOWSNT */ |
3e937712 | 152 | bufp = compile_pattern (match, 0, Qnil, 0, 1); |
1a9fbabe | 153 | # endif /* !WINDOWSNT */ |
14d55bce RS |
154 | } |
155 | ||
b3edfc9b | 156 | /* Note: ENCODE_FILE and DECODE_FILE can GC because they can run |
388ac098 GM |
157 | run_pre_post_conversion_on_str which calls Lisp directly and |
158 | indirectly. */ | |
6c8b4f07 SM |
159 | if (STRING_MULTIBYTE (dirfilename)) |
160 | dirfilename = ENCODE_FILE (dirfilename); | |
161 | encoded_directory = (STRING_MULTIBYTE (directory) | |
162 | ? ENCODE_FILE (directory) : directory); | |
24c2a54f | 163 | |
e50c66d3 | 164 | /* Now *bufp is the compiled form of MATCH; don't call anything |
6155fae1 JB |
165 | which might compile a new regexp until we're done with the loop! */ |
166 | ||
4d7e6e51 | 167 | block_input (); |
42a5b22f | 168 | d = opendir (SSDATA (dirfilename)); |
4d7e6e51 | 169 | unblock_input (); |
388ac098 | 170 | if (d == NULL) |
23bd240f | 171 | report_file_error ("Opening directory", Fcons (directory, Qnil)); |
14d55bce | 172 | |
2488aba5 AI |
173 | /* Unfortunately, we can now invoke expand-file-name and |
174 | file-attributes on filenames, both of which can throw, so we must | |
175 | do a proper unwind-protect. */ | |
176 | record_unwind_protect (directory_files_internal_unwind, | |
9d291bdf | 177 | make_save_value (d, 0)); |
2488aba5 | 178 | |
65156807 EZ |
179 | #ifdef WINDOWSNT |
180 | if (attrs) | |
181 | { | |
65156807 EZ |
182 | extern int is_slow_fs (const char *); |
183 | ||
184 | /* Do this only once to avoid doing it (in w32.c:stat) for each | |
185 | file in the directory, when we call Ffile_attributes below. */ | |
186 | record_unwind_protect (directory_files_internal_w32_unwind, | |
187 | Vw32_get_true_file_attributes); | |
188 | w32_save = Vw32_get_true_file_attributes; | |
189 | if (EQ (Vw32_get_true_file_attributes, Qlocal)) | |
190 | { | |
65156807 EZ |
191 | /* w32.c:stat will notice these bindings and avoid calling |
192 | GetDriveType for each file. */ | |
b6046155 | 193 | if (is_slow_fs (SDATA (dirfilename))) |
65156807 EZ |
194 | Vw32_get_true_file_attributes = Qnil; |
195 | else | |
196 | Vw32_get_true_file_attributes = Qt; | |
197 | } | |
198 | } | |
199 | #endif | |
200 | ||
d5db4077 | 201 | directory_nbytes = SBYTES (directory); |
c81a9bdc | 202 | re_match_object = Qt; |
14d55bce | 203 | |
96d64004 | 204 | /* Decide whether we need to add a directory separator. */ |
388ac098 | 205 | if (directory_nbytes == 0 |
d5db4077 | 206 | || !IS_ANY_SEP (SREF (directory, directory_nbytes - 1))) |
96d64004 | 207 | needsep = 1; |
96d64004 | 208 | |
8e42f043 | 209 | /* Loop reading blocks until EOF or error. */ |
f69f9da1 | 210 | for (;;) |
14d55bce | 211 | { |
f69f9da1 GM |
212 | errno = 0; |
213 | dp = readdir (d); | |
214 | ||
9d291bdf | 215 | if (dp == NULL && (0 |
f69f9da1 | 216 | #ifdef EAGAIN |
9d291bdf SM |
217 | || errno == EAGAIN |
218 | #endif | |
219 | #ifdef EINTR | |
220 | || errno == EINTR | |
f69f9da1 | 221 | #endif |
9d291bdf SM |
222 | )) |
223 | { QUIT; continue; } | |
177c0ea7 | 224 | |
f69f9da1 GM |
225 | if (dp == NULL) |
226 | break; | |
227 | ||
128ecc89 | 228 | if (DIRENTRY_NONEMPTY (dp)) |
14d55bce | 229 | { |
d311d28c | 230 | ptrdiff_t len; |
de1339b0 | 231 | bool wanted = 0; |
388ac098 | 232 | Lisp_Object name, finalname; |
dbf31225 | 233 | struct gcpro gcpro1, gcpro2; |
e23f810c KH |
234 | |
235 | len = NAMLEN (dp); | |
9ad4f3e5 | 236 | name = finalname = make_unibyte_string (dp->d_name, len); |
dbf31225 | 237 | GCPRO2 (finalname, name); |
177c0ea7 | 238 | |
6c8b4f07 | 239 | /* Note: DECODE_FILE can GC; it should protect its argument, |
388ac098 GM |
240 | though. */ |
241 | name = DECODE_FILE (name); | |
d5db4077 | 242 | len = SBYTES (name); |
e23f810c | 243 | |
2488aba5 AI |
244 | /* Now that we have unwind_protect in place, we might as well |
245 | allow matching to be interrupted. */ | |
246 | immediate_quit = 1; | |
247 | QUIT; | |
248 | ||
265a9e55 | 249 | if (NILP (match) |
42a5b22f | 250 | || (0 <= re_search (bufp, SSDATA (name), len, 0, len, 0))) |
388ac098 | 251 | wanted = 1; |
2488aba5 AI |
252 | |
253 | immediate_quit = 0; | |
254 | ||
255 | if (wanted) | |
14d55bce | 256 | { |
265a9e55 | 257 | if (!NILP (full)) |
14d55bce | 258 | { |
e23f810c | 259 | Lisp_Object fullname; |
d311d28c PE |
260 | ptrdiff_t nbytes = len + directory_nbytes + needsep; |
261 | ptrdiff_t nchars; | |
5617588f | 262 | |
388ac098 | 263 | fullname = make_uninit_multibyte_string (nbytes, nbytes); |
72af86bd AS |
264 | memcpy (SDATA (fullname), SDATA (directory), |
265 | directory_nbytes); | |
177c0ea7 | 266 | |
5617588f | 267 | if (needsep) |
d549c5db | 268 | SSET (fullname, directory_nbytes, DIRECTORY_SEP); |
177c0ea7 | 269 | |
72af86bd AS |
270 | memcpy (SDATA (fullname) + directory_nbytes + needsep, |
271 | SDATA (name), len); | |
177c0ea7 | 272 | |
d5db4077 | 273 | nchars = chars_in_text (SDATA (fullname), nbytes); |
388ac098 GM |
274 | |
275 | /* Some bug somewhere. */ | |
276 | if (nchars > nbytes) | |
1088b922 | 277 | emacs_abort (); |
177c0ea7 | 278 | |
437fcd47 | 279 | STRING_SET_CHARS (fullname, nchars); |
388ac098 | 280 | if (nchars == nbytes) |
d5db4077 | 281 | STRING_SET_UNIBYTE (fullname); |
177c0ea7 | 282 | |
4424b255 GV |
283 | finalname = fullname; |
284 | } | |
aab9c564 KH |
285 | else |
286 | finalname = name; | |
4424b255 GV |
287 | |
288 | if (attrs) | |
289 | { | |
290 | /* Construct an expanded filename for the directory entry. | |
291 | Use the decoded names for input to Ffile_attributes. */ | |
388ac098 | 292 | Lisp_Object decoded_fullname, fileattrs; |
dbf31225 | 293 | struct gcpro gcpro1, gcpro2; |
388ac098 GM |
294 | |
295 | decoded_fullname = fileattrs = Qnil; | |
dbf31225 | 296 | GCPRO2 (decoded_fullname, fileattrs); |
4424b255 | 297 | |
388ac098 | 298 | /* Both Fexpand_file_name and Ffile_attributes can GC. */ |
4424b255 | 299 | decoded_fullname = Fexpand_file_name (name, directory); |
6b61353c | 300 | fileattrs = Ffile_attributes (decoded_fullname, id_format); |
4424b255 GV |
301 | |
302 | list = Fcons (Fcons (finalname, fileattrs), list); | |
dbf31225 | 303 | UNGCPRO; |
4424b255 GV |
304 | } |
305 | else | |
388ac098 | 306 | list = Fcons (finalname, list); |
14d55bce | 307 | } |
388ac098 | 308 | |
dbf31225 | 309 | UNGCPRO; |
14d55bce RS |
310 | } |
311 | } | |
2488aba5 | 312 | |
4d7e6e51 | 313 | block_input (); |
14d55bce | 314 | closedir (d); |
4d7e6e51 | 315 | unblock_input (); |
65156807 EZ |
316 | #ifdef WINDOWSNT |
317 | if (attrs) | |
318 | Vw32_get_true_file_attributes = w32_save; | |
319 | #endif | |
2488aba5 AI |
320 | |
321 | /* Discard the unwind protect. */ | |
322 | specpdl_ptr = specpdl + count; | |
323 | ||
388ac098 GM |
324 | if (NILP (nosort)) |
325 | list = Fsort (Fnreverse (list), | |
326 | attrs ? Qfile_attributes_lessp : Qstring_lessp); | |
177c0ea7 | 327 | |
388ac098 | 328 | RETURN_UNGCPRO (list); |
14d55bce | 329 | } |
4424b255 GV |
330 | |
331 | ||
332 | DEFUN ("directory-files", Fdirectory_files, Sdirectory_files, 1, 4, 0, | |
335c5470 PJ |
333 | doc: /* Return a list of names of files in DIRECTORY. |
334 | There are three optional arguments: | |
335 | If FULL is non-nil, return absolute file names. Otherwise return names | |
336 | that are relative to the specified directory. | |
337 | If MATCH is non-nil, mention only file names that match the regexp MATCH. | |
338 | If NOSORT is non-nil, the list is not sorted--its order is unpredictable. | |
a489517b JB |
339 | Otherwise, the list returned is sorted with `string-lessp'. |
340 | NOSORT is useful if you plan to sort the result yourself. */) | |
5842a27b | 341 | (Lisp_Object directory, Lisp_Object full, Lisp_Object match, Lisp_Object nosort) |
4424b255 GV |
342 | { |
343 | Lisp_Object handler; | |
4ece81a6 | 344 | directory = Fexpand_file_name (directory, Qnil); |
4424b255 GV |
345 | |
346 | /* If the file name has special constructs in it, | |
347 | call the corresponding file handler. */ | |
348 | handler = Ffind_file_name_handler (directory, Qdirectory_files); | |
349 | if (!NILP (handler)) | |
6b61353c KH |
350 | return call5 (handler, Qdirectory_files, directory, |
351 | full, match, nosort); | |
4424b255 | 352 | |
6b61353c | 353 | return directory_files_internal (directory, full, match, nosort, 0, Qnil); |
4424b255 GV |
354 | } |
355 | ||
335c5470 | 356 | DEFUN ("directory-files-and-attributes", Fdirectory_files_and_attributes, |
6b61353c | 357 | Sdirectory_files_and_attributes, 1, 5, 0, |
335c5470 | 358 | doc: /* Return a list of names of files and their attributes in DIRECTORY. |
6b61353c | 359 | There are four optional arguments: |
335c5470 PJ |
360 | If FULL is non-nil, return absolute file names. Otherwise return names |
361 | that are relative to the specified directory. | |
362 | If MATCH is non-nil, mention only file names that match the regexp MATCH. | |
363 | If NOSORT is non-nil, the list is not sorted--its order is unpredictable. | |
6b61353c KH |
364 | NOSORT is useful if you plan to sort the result yourself. |
365 | ID-FORMAT specifies the preferred format of attributes uid and gid, see | |
6c5665e9 EZ |
366 | `file-attributes' for further documentation. |
367 | On MS-Windows, performance depends on `w32-get-true-file-attributes', | |
368 | which see. */) | |
5842a27b | 369 | (Lisp_Object directory, Lisp_Object full, Lisp_Object match, Lisp_Object nosort, Lisp_Object id_format) |
4424b255 GV |
370 | { |
371 | Lisp_Object handler; | |
4ece81a6 | 372 | directory = Fexpand_file_name (directory, Qnil); |
4424b255 GV |
373 | |
374 | /* If the file name has special constructs in it, | |
375 | call the corresponding file handler. */ | |
376 | handler = Ffind_file_name_handler (directory, Qdirectory_files_and_attributes); | |
377 | if (!NILP (handler)) | |
6b61353c KH |
378 | return call6 (handler, Qdirectory_files_and_attributes, |
379 | directory, full, match, nosort, id_format); | |
4424b255 | 380 | |
6b61353c | 381 | return directory_files_internal (directory, full, match, nosort, 1, id_format); |
4424b255 GV |
382 | } |
383 | ||
14d55bce | 384 | \f |
de1339b0 PE |
385 | static Lisp_Object file_name_completion (Lisp_Object, Lisp_Object, bool, |
386 | Lisp_Object); | |
14d55bce RS |
387 | |
388 | DEFUN ("file-name-completion", Ffile_name_completion, Sfile_name_completion, | |
abfb1932 | 389 | 2, 3, 0, |
335c5470 PJ |
390 | doc: /* Complete file name FILE in directory DIRECTORY. |
391 | Returns the longest string | |
392 | common to all file names in DIRECTORY that start with FILE. | |
393 | If there is only one and FILE matches it exactly, returns t. | |
2f60660a | 394 | Returns nil if DIRECTORY contains no name starting with FILE. |
335c5470 | 395 | |
b6ce54d6 RS |
396 | If PREDICATE is non-nil, call PREDICATE with each possible |
397 | completion (in absolute form) and ignore it if PREDICATE returns nil. | |
398 | ||
335c5470 PJ |
399 | This function ignores some of the possible completions as |
400 | determined by the variable `completion-ignored-extensions', which see. */) | |
5842a27b | 401 | (Lisp_Object file, Lisp_Object directory, Lisp_Object predicate) |
14d55bce | 402 | { |
32f4334d | 403 | Lisp_Object handler; |
32c1fffd | 404 | directory = Fexpand_file_name (directory, Qnil); |
32f4334d | 405 | |
8436e231 | 406 | /* If the directory name has special constructs in it, |
32f4334d | 407 | call the corresponding file handler. */ |
23bd240f | 408 | handler = Ffind_file_name_handler (directory, Qfile_name_completion); |
32f4334d | 409 | if (!NILP (handler)) |
abfb1932 | 410 | return call4 (handler, Qfile_name_completion, file, directory, predicate); |
32f4334d | 411 | |
8436e231 RS |
412 | /* If the file name has special constructs in it, |
413 | call the corresponding file handler. */ | |
414 | handler = Ffind_file_name_handler (file, Qfile_name_completion); | |
415 | if (!NILP (handler)) | |
abfb1932 | 416 | return call4 (handler, Qfile_name_completion, file, directory, predicate); |
8436e231 | 417 | |
de1339b0 | 418 | return file_name_completion (file, directory, 0, predicate); |
14d55bce RS |
419 | } |
420 | ||
421 | DEFUN ("file-name-all-completions", Ffile_name_all_completions, | |
335c5470 PJ |
422 | Sfile_name_all_completions, 2, 2, 0, |
423 | doc: /* Return a list of all completions of file name FILE in directory DIRECTORY. | |
424 | These are all file names in directory DIRECTORY which begin with FILE. */) | |
5842a27b | 425 | (Lisp_Object file, Lisp_Object directory) |
14d55bce | 426 | { |
32f4334d | 427 | Lisp_Object handler; |
32c1fffd | 428 | directory = Fexpand_file_name (directory, Qnil); |
32f4334d | 429 | |
8436e231 | 430 | /* If the directory name has special constructs in it, |
32f4334d | 431 | call the corresponding file handler. */ |
23bd240f | 432 | handler = Ffind_file_name_handler (directory, Qfile_name_all_completions); |
32f4334d | 433 | if (!NILP (handler)) |
23bd240f | 434 | return call3 (handler, Qfile_name_all_completions, file, directory); |
32f4334d | 435 | |
8436e231 RS |
436 | /* If the file name has special constructs in it, |
437 | call the corresponding file handler. */ | |
438 | handler = Ffind_file_name_handler (file, Qfile_name_all_completions); | |
439 | if (!NILP (handler)) | |
23bd240f | 440 | return call3 (handler, Qfile_name_all_completions, file, directory); |
8436e231 | 441 | |
de1339b0 | 442 | return file_name_completion (file, directory, 1, Qnil); |
14d55bce RS |
443 | } |
444 | ||
438105ed | 445 | static int file_name_completion_stat (Lisp_Object dirname, DIRENTRY *dp, struct stat *st_addr); |
955cbe7b | 446 | static Lisp_Object Qdefault_directory; |
dfcf069d | 447 | |
16390cd2 | 448 | static Lisp_Object |
de1339b0 PE |
449 | file_name_completion (Lisp_Object file, Lisp_Object dirname, bool all_flag, |
450 | Lisp_Object predicate) | |
14d55bce RS |
451 | { |
452 | DIR *d; | |
d311d28c | 453 | ptrdiff_t bestmatchsize = 0; |
14d55bce | 454 | int matchcount = 0; |
abfb1932 RS |
455 | /* If ALL_FLAG is 1, BESTMATCH is the list of all matches, decoded. |
456 | If ALL_FLAG is 0, BESTMATCH is either nil | |
457 | or the best match so far, not decoded. */ | |
14d55bce | 458 | Lisp_Object bestmatch, tem, elt, name; |
24c2a54f RS |
459 | Lisp_Object encoded_file; |
460 | Lisp_Object encoded_dir; | |
14d55bce | 461 | struct stat st; |
59ea14cd | 462 | bool directoryp; |
de1339b0 | 463 | /* If not INCLUDEALL, exclude files in completion-ignored-extensions as |
3271a8f5 SM |
464 | well as "." and "..". Until shown otherwise, assume we can't exclude |
465 | anything. */ | |
de1339b0 | 466 | bool includeall = 1; |
d311d28c | 467 | ptrdiff_t count = SPECPDL_INDEX (); |
24c2a54f | 468 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
3fcc88cc | 469 | |
6bbd7a29 GM |
470 | elt = Qnil; |
471 | ||
b7826503 | 472 | CHECK_STRING (file); |
14d55bce | 473 | |
14d55bce | 474 | bestmatch = Qnil; |
24c2a54f RS |
475 | encoded_file = encoded_dir = Qnil; |
476 | GCPRO5 (file, dirname, bestmatch, encoded_file, encoded_dir); | |
01bb4018 | 477 | specbind (Qdefault_directory, dirname); |
14d55bce | 478 | |
24c2a54f RS |
479 | /* Do completion on the encoded file name |
480 | because the other names in the directory are (we presume) | |
481 | encoded likewise. We decode the completed string at the end. */ | |
2a54a229 SM |
482 | /* Actually, this is not quite true any more: we do most of the completion |
483 | work with decoded file names, but we still do some filtering based | |
484 | on the encoded file name. */ | |
6c8b4f07 | 485 | encoded_file = STRING_MULTIBYTE (file) ? ENCODE_FILE (file) : file; |
24c2a54f RS |
486 | |
487 | encoded_dir = ENCODE_FILE (dirname); | |
488 | ||
4d7e6e51 | 489 | block_input (); |
42a5b22f | 490 | d = opendir (SSDATA (Fdirectory_file_name (encoded_dir))); |
4d7e6e51 | 491 | unblock_input (); |
3271a8f5 SM |
492 | if (!d) |
493 | report_file_error ("Opening directory", Fcons (dirname, Qnil)); | |
14d55bce | 494 | |
3271a8f5 SM |
495 | record_unwind_protect (directory_files_internal_unwind, |
496 | make_save_value (d, 0)); | |
14d55bce | 497 | |
3271a8f5 SM |
498 | /* Loop reading blocks */ |
499 | /* (att3b compiler bug requires do a null comparison this way) */ | |
500 | while (1) | |
14d55bce | 501 | { |
3271a8f5 | 502 | DIRENTRY *dp; |
d311d28c | 503 | ptrdiff_t len; |
de1339b0 | 504 | bool canexclude = 0; |
14d55bce | 505 | |
3271a8f5 SM |
506 | errno = 0; |
507 | dp = readdir (d); | |
508 | if (dp == NULL && (0 | |
9d291bdf | 509 | # ifdef EAGAIN |
3271a8f5 | 510 | || errno == EAGAIN |
9d291bdf SM |
511 | # endif |
512 | # ifdef EINTR | |
3271a8f5 | 513 | || errno == EINTR |
9d291bdf | 514 | # endif |
3271a8f5 SM |
515 | )) |
516 | { QUIT; continue; } | |
9d291bdf | 517 | |
3271a8f5 | 518 | if (!dp) break; |
14d55bce | 519 | |
3271a8f5 | 520 | len = NAMLEN (dp); |
14d55bce | 521 | |
3271a8f5 SM |
522 | QUIT; |
523 | if (! DIRENTRY_NONEMPTY (dp) | |
524 | || len < SCHARS (encoded_file) | |
4f043d0f | 525 | || 0 <= scmp (dp->d_name, SSDATA (encoded_file), |
3271a8f5 SM |
526 | SCHARS (encoded_file))) |
527 | continue; | |
14d55bce | 528 | |
3271a8f5 SM |
529 | if (file_name_completion_stat (encoded_dir, dp, &st) < 0) |
530 | continue; | |
14d55bce | 531 | |
59ea14cd | 532 | directoryp = S_ISDIR (st.st_mode) != 0; |
3271a8f5 SM |
533 | tem = Qnil; |
534 | /* If all_flag is set, always include all. | |
535 | It would not actually be helpful to the user to ignore any possible | |
536 | completions when making a list of them. */ | |
537 | if (!all_flag) | |
538 | { | |
d311d28c | 539 | ptrdiff_t skip; |
2cd298e2 | 540 | |
7519c40d | 541 | #if 0 /* FIXME: The `scmp' call compares an encoded and a decoded string. */ |
2cd298e2 SM |
542 | /* If this entry matches the current bestmatch, the only |
543 | thing it can do is increase matchcount, so don't bother | |
544 | investigating it any further. */ | |
545 | if (!completion_ignore_case | |
546 | /* The return result depends on whether it's the sole match. */ | |
547 | && matchcount > 1 | |
548 | && !includeall /* This match may allow includeall to 0. */ | |
549 | && len >= bestmatchsize | |
4f043d0f | 550 | && 0 > scmp (dp->d_name, SSDATA (bestmatch), bestmatchsize)) |
2cd298e2 | 551 | continue; |
7519c40d | 552 | #endif |
2cd298e2 | 553 | |
3271a8f5 | 554 | if (directoryp) |
ad456ad4 RS |
555 | { |
556 | #ifndef TRIVIAL_DIRECTORY_ENTRY | |
557 | #define TRIVIAL_DIRECTORY_ENTRY(n) (!strcmp (n, ".") || !strcmp (n, "..")) | |
558 | #endif | |
abfb1932 RS |
559 | /* "." and ".." are never interesting as completions, and are |
560 | actually in the way in a directory with only one file. */ | |
3271a8f5 SM |
561 | if (TRIVIAL_DIRECTORY_ENTRY (dp->d_name)) |
562 | canexclude = 1; | |
563 | else if (len > SCHARS (encoded_file)) | |
d013f29b EZ |
564 | /* Ignore directories if they match an element of |
565 | completion-ignored-extensions which ends in a slash. */ | |
566 | for (tem = Vcompletion_ignored_extensions; | |
567 | CONSP (tem); tem = XCDR (tem)) | |
568 | { | |
d311d28c | 569 | ptrdiff_t elt_len; |
4f043d0f | 570 | char *p1; |
d013f29b EZ |
571 | |
572 | elt = XCAR (tem); | |
573 | if (!STRINGP (elt)) | |
574 | continue; | |
a74aaa9d EZ |
575 | /* Need to encode ELT, since scmp compares unibyte |
576 | strings only. */ | |
577 | elt = ENCODE_FILE (elt); | |
d5db4077 | 578 | elt_len = SCHARS (elt) - 1; /* -1 for trailing / */ |
7a8d465a | 579 | if (elt_len <= 0) |
d013f29b | 580 | continue; |
4f043d0f | 581 | p1 = SSDATA (elt); |
d013f29b EZ |
582 | if (p1[elt_len] != '/') |
583 | continue; | |
584 | skip = len - elt_len; | |
585 | if (skip < 0) | |
586 | continue; | |
587 | ||
588 | if (0 <= scmp (dp->d_name + skip, p1, elt_len)) | |
589 | continue; | |
590 | break; | |
591 | } | |
ad456ad4 RS |
592 | } |
593 | else | |
3271a8f5 | 594 | { |
14d55bce RS |
595 | /* Compare extensions-to-be-ignored against end of this file name */ |
596 | /* if name is not an exact match against specified string */ | |
3271a8f5 | 597 | if (len > SCHARS (encoded_file)) |
14d55bce RS |
598 | /* and exit this for loop if a match is found */ |
599 | for (tem = Vcompletion_ignored_extensions; | |
70949dac | 600 | CONSP (tem); tem = XCDR (tem)) |
14d55bce | 601 | { |
70949dac | 602 | elt = XCAR (tem); |
88cf1852 | 603 | if (!STRINGP (elt)) continue; |
a74aaa9d EZ |
604 | /* Need to encode ELT, since scmp compares unibyte |
605 | strings only. */ | |
606 | elt = ENCODE_FILE (elt); | |
d5db4077 | 607 | skip = len - SCHARS (elt); |
14d55bce RS |
608 | if (skip < 0) continue; |
609 | ||
610 | if (0 <= scmp (dp->d_name + skip, | |
4f043d0f | 611 | SSDATA (elt), |
d5db4077 | 612 | SCHARS (elt))) |
14d55bce RS |
613 | continue; |
614 | break; | |
615 | } | |
616 | } | |
617 | ||
f676868d KH |
618 | /* If an ignored-extensions match was found, |
619 | don't process this name as a completion. */ | |
3271a8f5 SM |
620 | if (CONSP (tem)) |
621 | canexclude = 1; | |
f676868d | 622 | |
3271a8f5 SM |
623 | if (!includeall && canexclude) |
624 | /* We're not including all files and this file can be excluded. */ | |
625 | continue; | |
9c691c00 | 626 | |
3271a8f5 SM |
627 | if (includeall && !canexclude) |
628 | { /* If we have one non-excludable file, we want to exclude the | |
4c36be58 | 629 | excludable files. */ |
3271a8f5 SM |
630 | includeall = 0; |
631 | /* Throw away any previous excludable match found. */ | |
632 | bestmatch = Qnil; | |
633 | bestmatchsize = 0; | |
634 | matchcount = 0; | |
f676868d | 635 | } |
3271a8f5 SM |
636 | } |
637 | /* FIXME: If we move this `decode' earlier we can eliminate | |
638 | the repeated ENCODE_FILE on Vcompletion_ignored_extensions. */ | |
639 | name = make_unibyte_string (dp->d_name, len); | |
640 | name = DECODE_FILE (name); | |
641 | ||
642 | { | |
643 | Lisp_Object regexps; | |
3271a8f5 SM |
644 | |
645 | /* Ignore this element if it fails to match all the regexps. */ | |
cc524e3b CY |
646 | if (completion_ignore_case) |
647 | { | |
648 | for (regexps = Vcompletion_regexp_list; CONSP (regexps); | |
649 | regexps = XCDR (regexps)) | |
650 | if (fast_string_match_ignore_case (XCAR (regexps), name) < 0) | |
651 | break; | |
652 | } | |
653 | else | |
654 | { | |
655 | for (regexps = Vcompletion_regexp_list; CONSP (regexps); | |
656 | regexps = XCDR (regexps)) | |
657 | if (fast_string_match (XCAR (regexps), name) < 0) | |
658 | break; | |
659 | } | |
660 | ||
3271a8f5 SM |
661 | if (CONSP (regexps)) |
662 | continue; | |
663 | } | |
664 | ||
665 | /* This is a possible completion */ | |
666 | if (directoryp) | |
667 | /* This completion is a directory; make it end with '/'. */ | |
668 | name = Ffile_name_as_directory (name); | |
669 | ||
670 | /* Test the predicate, if any. */ | |
671 | if (!NILP (predicate)) | |
672 | { | |
673 | Lisp_Object val; | |
dbf31225 | 674 | struct gcpro gcpro1; |
14d55bce | 675 | |
dbf31225 | 676 | GCPRO1 (name); |
3271a8f5 | 677 | val = call1 (predicate, name); |
dbf31225 | 678 | UNGCPRO; |
c4c52bb7 | 679 | |
3271a8f5 SM |
680 | if (NILP (val)) |
681 | continue; | |
682 | } | |
abfb1932 | 683 | |
3271a8f5 | 684 | /* Suitably record this match. */ |
14d55bce | 685 | |
d311d28c | 686 | matchcount += matchcount <= 1; |
f676868d | 687 | |
3271a8f5 SM |
688 | if (all_flag) |
689 | bestmatch = Fcons (name, bestmatch); | |
690 | else if (NILP (bestmatch)) | |
691 | { | |
692 | bestmatch = name; | |
693 | bestmatchsize = SCHARS (name); | |
694 | } | |
695 | else | |
696 | { | |
697 | Lisp_Object zero = make_number (0); | |
698 | /* FIXME: This is a copy of the code in Ftry_completion. */ | |
d311d28c | 699 | ptrdiff_t compare = min (bestmatchsize, SCHARS (name)); |
38b2c076 | 700 | Lisp_Object cmp |
3271a8f5 SM |
701 | = Fcompare_strings (bestmatch, zero, |
702 | make_number (compare), | |
703 | name, zero, | |
704 | make_number (compare), | |
705 | completion_ignore_case ? Qt : Qnil); | |
d311d28c | 706 | ptrdiff_t matchsize |
38b2c076 PE |
707 | = (EQ (cmp, Qt) ? compare |
708 | : XINT (cmp) < 0 ? - XINT (cmp) - 1 | |
709 | : XINT (cmp) - 1); | |
3271a8f5 SM |
710 | |
711 | if (completion_ignore_case) | |
f676868d | 712 | { |
3271a8f5 SM |
713 | /* If this is an exact match except for case, |
714 | use it as the best match rather than one that is not | |
715 | an exact match. This way, we get the case pattern | |
716 | of the actual match. */ | |
717 | /* This tests that the current file is an exact match | |
718 | but BESTMATCH is not (it is too long). */ | |
719 | if ((matchsize == SCHARS (name) | |
59ea14cd | 720 | && matchsize + directoryp < SCHARS (bestmatch)) |
3271a8f5 SM |
721 | || |
722 | /* If there is no exact match ignoring case, | |
723 | prefer a match that does not change the case | |
724 | of the input. */ | |
725 | /* If there is more than one exact match aside from | |
726 | case, and one of them is exact including case, | |
727 | prefer that one. */ | |
728 | /* This == checks that, of current file and BESTMATCH, | |
729 | either both or neither are exact. */ | |
730 | (((matchsize == SCHARS (name)) | |
731 | == | |
59ea14cd | 732 | (matchsize + directoryp == SCHARS (bestmatch))) |
38b2c076 | 733 | && (cmp = Fcompare_strings (name, zero, |
3271a8f5 SM |
734 | make_number (SCHARS (file)), |
735 | file, zero, | |
736 | Qnil, | |
737 | Qnil), | |
38b2c076 PE |
738 | EQ (Qt, cmp)) |
739 | && (cmp = Fcompare_strings (bestmatch, zero, | |
3271a8f5 SM |
740 | make_number (SCHARS (file)), |
741 | file, zero, | |
742 | Qnil, | |
743 | Qnil), | |
38b2c076 | 744 | ! EQ (Qt, cmp)))) |
3271a8f5 | 745 | bestmatch = name; |
14d55bce | 746 | } |
3271a8f5 | 747 | bestmatchsize = matchsize; |
2cd298e2 SM |
748 | |
749 | /* If the best completion so far is reduced to the string | |
750 | we're trying to complete, then we already know there's no | |
751 | other completion, so there's no point looking any further. */ | |
752 | if (matchsize <= SCHARS (file) | |
753 | && !includeall /* A future match may allow includeall to 0. */ | |
754 | /* If completion-ignore-case is non-nil, don't | |
755 | short-circuit because we want to find the best | |
756 | possible match *including* case differences. */ | |
757 | && (!completion_ignore_case || matchsize == 0) | |
758 | /* The return value depends on whether it's the sole match. */ | |
759 | && matchcount > 1) | |
760 | break; | |
761 | ||
14d55bce | 762 | } |
14d55bce RS |
763 | } |
764 | ||
3fcc88cc | 765 | UNGCPRO; |
3271a8f5 | 766 | /* This closes the directory. */ |
c3a3229c | 767 | bestmatch = unbind_to (count, bestmatch); |
14d55bce | 768 | |
265a9e55 | 769 | if (all_flag || NILP (bestmatch)) |
2a54a229 | 770 | return bestmatch; |
928b5acc SM |
771 | /* Return t if the supplied string is an exact match (counting case); |
772 | it does not require any change to be made. */ | |
773 | if (matchcount == 1 && !NILP (Fequal (bestmatch, file))) | |
14d55bce | 774 | return Qt; |
24c2a54f RS |
775 | bestmatch = Fsubstring (bestmatch, make_number (0), |
776 | make_number (bestmatchsize)); | |
24c2a54f | 777 | return bestmatch; |
14d55bce RS |
778 | } |
779 | ||
b3f04ced RS |
780 | /* Compare exactly LEN chars of strings at S1 and S2, |
781 | ignoring case if appropriate. | |
782 | Return -1 if strings match, | |
783 | else number of chars that match at the beginning. */ | |
784 | ||
d311d28c PE |
785 | static ptrdiff_t |
786 | scmp (const char *s1, const char *s2, ptrdiff_t len) | |
b3f04ced | 787 | { |
d311d28c | 788 | register ptrdiff_t l = len; |
b3f04ced RS |
789 | |
790 | if (completion_ignore_case) | |
791 | { | |
4f043d0f | 792 | while (l |
5da9919f PE |
793 | && (downcase ((unsigned char) *s1++) |
794 | == downcase ((unsigned char) *s2++))) | |
b3f04ced RS |
795 | l--; |
796 | } | |
797 | else | |
798 | { | |
799 | while (l && *s1++ == *s2++) | |
800 | l--; | |
801 | } | |
802 | if (l == 0) | |
803 | return -1; | |
804 | else | |
805 | return len - l; | |
806 | } | |
807 | ||
dfcf069d | 808 | static int |
438105ed | 809 | file_name_completion_stat (Lisp_Object dirname, DIRENTRY *dp, struct stat *st_addr) |
14d55bce | 810 | { |
d311d28c PE |
811 | ptrdiff_t len = NAMLEN (dp); |
812 | ptrdiff_t pos = SCHARS (dirname); | |
7e3cf34f | 813 | int value; |
d311d28c | 814 | USE_SAFE_ALLOCA; |
98c6f1e3 | 815 | char *fullname = SAFE_ALLOCA (len + pos + 2); |
14d55bce | 816 | |
04924ee3 | 817 | #ifdef MSDOS |
04924ee3 RS |
818 | /* Some fields of struct stat are *very* expensive to compute on MS-DOS, |
819 | but aren't required here. Avoid computing the following fields: | |
820 | st_inode, st_size and st_nlink for directories, and the execute bits | |
821 | in st_mode for non-directory files with non-standard extensions. */ | |
822 | ||
823 | unsigned short save_djstat_flags = _djstat_flags; | |
824 | ||
825 | _djstat_flags = _STAT_INODE | _STAT_EXEC_MAGIC | _STAT_DIRSIZE; | |
04924ee3 RS |
826 | #endif /* MSDOS */ |
827 | ||
72af86bd | 828 | memcpy (fullname, SDATA (dirname), pos); |
0b39d75d RS |
829 | if (!IS_DIRECTORY_SEP (fullname[pos - 1])) |
830 | fullname[pos++] = DIRECTORY_SEP; | |
14d55bce | 831 | |
72af86bd | 832 | memcpy (fullname + pos, dp->d_name, len); |
14d55bce RS |
833 | fullname[pos + len] = 0; |
834 | ||
7e3cf34f RS |
835 | /* We want to return success if a link points to a nonexistent file, |
836 | but we want to return the status for what the link points to, | |
837 | in case it is a directory. */ | |
838 | value = lstat (fullname, st_addr); | |
f68c809d PE |
839 | if (value == 0 && S_ISLNK (st_addr->st_mode)) |
840 | stat (fullname, st_addr); | |
04924ee3 | 841 | #ifdef MSDOS |
04924ee3 | 842 | _djstat_flags = save_djstat_flags; |
04924ee3 | 843 | #endif /* MSDOS */ |
d311d28c | 844 | SAFE_FREE (); |
04924ee3 | 845 | return value; |
14d55bce RS |
846 | } |
847 | \f | |
8aaaec6b EZ |
848 | static char * |
849 | stat_uname (struct stat *st) | |
850 | { | |
851 | #ifdef WINDOWSNT | |
852 | return st->st_uname; | |
853 | #else | |
854 | struct passwd *pw = (struct passwd *) getpwuid (st->st_uid); | |
855 | ||
856 | if (pw) | |
857 | return pw->pw_name; | |
858 | else | |
859 | return NULL; | |
860 | #endif | |
861 | } | |
862 | ||
863 | static char * | |
864 | stat_gname (struct stat *st) | |
865 | { | |
866 | #ifdef WINDOWSNT | |
867 | return st->st_gname; | |
868 | #else | |
869 | struct group *gr = (struct group *) getgrgid (st->st_gid); | |
870 | ||
871 | if (gr) | |
872 | return gr->gr_name; | |
873 | else | |
874 | return NULL; | |
875 | #endif | |
876 | } | |
877 | ||
6b61353c | 878 | DEFUN ("file-attributes", Ffile_attributes, Sfile_attributes, 1, 2, 0, |
335c5470 PJ |
879 | doc: /* Return a list of attributes of file FILENAME. |
880 | Value is nil if specified file cannot be opened. | |
6b61353c KH |
881 | |
882 | ID-FORMAT specifies the preferred format of attributes uid and gid (see | |
e42cd1a7 JB |
883 | below) - valid values are 'string and 'integer. The latter is the |
884 | default, but we plan to change that, so you should specify a non-nil value | |
885 | for ID-FORMAT if you use the returned uid or gid. | |
6b61353c KH |
886 | |
887 | Elements of the attribute list are: | |
335c5470 PJ |
888 | 0. t for directory, string (name linked to) for symbolic link, or nil. |
889 | 1. Number of links to file. | |
78e7d1fe EZ |
890 | 2. File uid as a string or a number. If a string value cannot be |
891 | looked up, a numeric value, either an integer or a float, is returned. | |
6b61353c | 892 | 3. File gid, likewise. |
d35af63c PE |
893 | 4. Last access time, as a list of integers (HIGH LOW USEC PSEC) in the |
894 | same style as (current-time). | |
e02131a2 EZ |
895 | (See a note below about access time on FAT-based filesystems.) |
896 | 5. Last modification time, likewise. This is the time of the last | |
897 | change to the file's contents. | |
898 | 6. Last status change time, likewise. This is the time of last change | |
899 | to the file's attributes: owner and group, access mode bits, etc. | |
335c5470 PJ |
900 | 7. Size in bytes. |
901 | This is a floating point number if the size is too large for an integer. | |
902 | 8. File modes, as a string of ten letters or dashes as in ls -l. | |
e0f24100 | 903 | 9. t if file's gid would change if file were deleted and recreated. |
be44ca6c PE |
904 | 10. inode number. If it is larger than what an Emacs integer can hold, |
905 | this is of the form (HIGH . LOW): first the high bits, then the low 16 bits. | |
906 | If even HIGH is too large for an Emacs integer, this is instead of the form | |
907 | (HIGH MIDDLE . LOW): first the high bits, then the middle 24 bits, | |
e02131a2 EZ |
908 | and finally the low 16 bits. |
909 | 11. Filesystem device number. If it is larger than what the Emacs | |
910 | integer can hold, this is a cons cell, similar to the inode number. | |
911 | ||
912 | On most filesystems, the combination of the inode and the device | |
913 | number uniquely identifies the file. | |
6c5665e9 EZ |
914 | |
915 | On MS-Windows, performance depends on `w32-get-true-file-attributes', | |
21f73755 EZ |
916 | which see. |
917 | ||
918 | On some FAT-based filesystems, only the date of last access is recorded, | |
919 | so last access time will always be midnight of that day. */) | |
5842a27b | 920 | (Lisp_Object filename, Lisp_Object id_format) |
14d55bce RS |
921 | { |
922 | Lisp_Object values[12]; | |
24c2a54f | 923 | Lisp_Object encoded; |
14d55bce | 924 | struct stat s; |
98601119 | 925 | #ifdef BSD4_2 |
b3edfc9b | 926 | Lisp_Object dirname; |
14d55bce | 927 | struct stat sdir; |
98601119 | 928 | #endif /* BSD4_2 */ |
4ad89555 PE |
929 | |
930 | /* An array to hold the mode string generated by filemodestring, | |
931 | including its terminating space and null byte. */ | |
932 | char modes[sizeof "-rwxr-xr-x "]; | |
933 | ||
32f4334d | 934 | Lisp_Object handler; |
7435aef8 | 935 | struct gcpro gcpro1; |
51105b13 | 936 | char *uname = NULL, *gname = NULL; |
14d55bce RS |
937 | |
938 | filename = Fexpand_file_name (filename, Qnil); | |
32f4334d RS |
939 | |
940 | /* If the file name has special constructs in it, | |
941 | call the corresponding file handler. */ | |
a617e913 | 942 | handler = Ffind_file_name_handler (filename, Qfile_attributes); |
32f4334d | 943 | if (!NILP (handler)) |
6b61353c KH |
944 | { /* Only pass the extra arg if it is used to help backward compatibility |
945 | with old file handlers which do not implement the new arg. --Stef */ | |
946 | if (NILP (id_format)) | |
947 | return call2 (handler, Qfile_attributes, filename); | |
948 | else | |
949 | return call3 (handler, Qfile_attributes, filename, id_format); | |
950 | } | |
32f4334d | 951 | |
7435aef8 | 952 | GCPRO1 (filename); |
24c2a54f | 953 | encoded = ENCODE_FILE (filename); |
7435aef8 | 954 | UNGCPRO; |
24c2a54f | 955 | |
42a5b22f | 956 | if (lstat (SSDATA (encoded), &s) < 0) |
14d55bce RS |
957 | return Qnil; |
958 | ||
8d40723d PE |
959 | values[0] = (S_ISLNK (s.st_mode) ? Ffile_symlink_p (filename) |
960 | : S_ISDIR (s.st_mode) ? Qt : Qnil); | |
14d55bce | 961 | values[1] = make_number (s.st_nlink); |
51105b13 EZ |
962 | |
963 | if (!(NILP (id_format) || EQ (id_format, Qinteger))) | |
6b61353c | 964 | { |
4d7e6e51 | 965 | block_input (); |
8aaaec6b | 966 | uname = stat_uname (&s); |
8aaaec6b | 967 | gname = stat_gname (&s); |
4d7e6e51 | 968 | unblock_input (); |
6b61353c | 969 | } |
51105b13 | 970 | if (uname) |
80904120 | 971 | values[2] = DECODE_SYSTEM (build_string (uname)); |
51105b13 | 972 | else |
58a12889 | 973 | values[2] = make_fixnum_or_float (s.st_uid); |
51105b13 | 974 | if (gname) |
80904120 | 975 | values[3] = DECODE_SYSTEM (build_string (gname)); |
51105b13 | 976 | else |
58a12889 | 977 | values[3] = make_fixnum_or_float (s.st_gid); |
51105b13 | 978 | |
d35af63c PE |
979 | values[4] = make_lisp_time (get_stat_atime (&s)); |
980 | values[5] = make_lisp_time (get_stat_mtime (&s)); | |
981 | values[6] = make_lisp_time (get_stat_ctime (&s)); | |
83c77d31 PE |
982 | |
983 | /* If the file size is a 4-byte type, assume that files of sizes in | |
984 | the 2-4 GiB range wrap around to negative values, as this is a | |
985 | common bug on older 32-bit platforms. */ | |
986 | if (sizeof (s.st_size) == 4) | |
987 | values[7] = make_fixnum_or_float (s.st_size & 0xffffffffu); | |
988 | else | |
989 | values[7] = make_fixnum_or_float (s.st_size); | |
4bc12672 | 990 | |
14d55bce RS |
991 | filemodestring (&s, modes); |
992 | values[8] = make_string (modes, 10); | |
98601119 | 993 | #ifdef BSD4_2 /* file gid will be dir gid */ |
14d55bce | 994 | dirname = Ffile_name_directory (filename); |
24c2a54f RS |
995 | if (! NILP (dirname)) |
996 | encoded = ENCODE_FILE (dirname); | |
d5db4077 | 997 | if (! NILP (dirname) && stat (SDATA (encoded), &sdir) == 0) |
01388a3d | 998 | values[9] = (sdir.st_gid != s.st_gid) ? Qt : Qnil; |
14d55bce RS |
999 | else /* if we can't tell, assume worst */ |
1000 | values[9] = Qt; | |
1001 | #else /* file gid will be egid */ | |
01388a3d | 1002 | values[9] = (s.st_gid != getegid ()) ? Qt : Qnil; |
98601119 | 1003 | #endif /* not BSD4_2 */ |
be44ca6c PE |
1004 | values[10] = INTEGER_TO_CONS (s.st_ino); |
1005 | values[11] = INTEGER_TO_CONS (s.st_dev); | |
68c45bf0 | 1006 | |
5e617bc2 | 1007 | return Flist (sizeof (values) / sizeof (values[0]), values); |
14d55bce | 1008 | } |
4424b255 GV |
1009 | |
1010 | DEFUN ("file-attributes-lessp", Ffile_attributes_lessp, Sfile_attributes_lessp, 2, 2, 0, | |
335c5470 PJ |
1011 | doc: /* Return t if first arg file attributes list is less than second. |
1012 | Comparison is in lexicographic order and case is significant. */) | |
5842a27b | 1013 | (Lisp_Object f1, Lisp_Object f2) |
4424b255 GV |
1014 | { |
1015 | return Fstring_lessp (Fcar (f1), Fcar (f2)); | |
1016 | } | |
14d55bce | 1017 | \f |
316411f0 DA |
1018 | |
1019 | DEFUN ("system-users", Fsystem_users, Ssystem_users, 0, 0, 0, | |
1020 | doc: /* Return a list of user names currently registered in the system. | |
e5a36063 GM |
1021 | If we don't know how to determine that on this platform, just |
1022 | return a list with one element, taken from `user-real-login-name'. */) | |
316411f0 DA |
1023 | (void) |
1024 | { | |
1025 | Lisp_Object users = Qnil; | |
aba027e8 | 1026 | #if defined HAVE_GETPWENT && defined HAVE_ENDPWENT |
316411f0 DA |
1027 | struct passwd *pw; |
1028 | ||
1029 | while ((pw = getpwent ())) | |
1030 | users = Fcons (DECODE_SYSTEM (build_string (pw->pw_name)), users); | |
1031 | ||
1032 | endpwent (); | |
1033 | #endif | |
1034 | if (EQ (users, Qnil)) | |
1035 | /* At least current user is always known. */ | |
1036 | users = Fcons (Vuser_real_login_name, Qnil); | |
1037 | return users; | |
1038 | } | |
1039 | ||
1040 | DEFUN ("system-groups", Fsystem_groups, Ssystem_groups, 0, 0, 0, | |
1041 | doc: /* Return a list of user group names currently registered in the system. | |
1042 | The value may be nil if not supported on this platform. */) | |
1043 | (void) | |
1044 | { | |
1045 | Lisp_Object groups = Qnil; | |
aba027e8 | 1046 | #if defined HAVE_GETGRENT && defined HAVE_ENDGRENT |
316411f0 | 1047 | struct group *gr; |
316411f0 DA |
1048 | |
1049 | while ((gr = getgrent ())) | |
1050 | groups = Fcons (DECODE_SYSTEM (build_string (gr->gr_name)), groups); | |
1051 | ||
1052 | endgrent (); | |
1053 | #endif | |
1054 | return groups; | |
1055 | } | |
1056 | ||
dfcf069d | 1057 | void |
971de7fb | 1058 | syms_of_dired (void) |
14d55bce | 1059 | { |
cd3520a4 JB |
1060 | DEFSYM (Qdirectory_files, "directory-files"); |
1061 | DEFSYM (Qdirectory_files_and_attributes, "directory-files-and-attributes"); | |
1062 | DEFSYM (Qfile_name_completion, "file-name-completion"); | |
1063 | DEFSYM (Qfile_name_all_completions, "file-name-all-completions"); | |
1064 | DEFSYM (Qfile_attributes, "file-attributes"); | |
1065 | DEFSYM (Qfile_attributes_lessp, "file-attributes-lessp"); | |
1066 | DEFSYM (Qdefault_directory, "default-directory"); | |
a2d3836c | 1067 | |
14d55bce | 1068 | defsubr (&Sdirectory_files); |
4424b255 | 1069 | defsubr (&Sdirectory_files_and_attributes); |
14d55bce | 1070 | defsubr (&Sfile_name_completion); |
14d55bce RS |
1071 | defsubr (&Sfile_name_all_completions); |
1072 | defsubr (&Sfile_attributes); | |
4424b255 | 1073 | defsubr (&Sfile_attributes_lessp); |
316411f0 DA |
1074 | defsubr (&Ssystem_users); |
1075 | defsubr (&Ssystem_groups); | |
14d55bce | 1076 | |
29208e82 | 1077 | DEFVAR_LISP ("completion-ignored-extensions", Vcompletion_ignored_extensions, |
407a52c4 LT |
1078 | doc: /* Completion ignores file names ending in any string in this list. |
1079 | It does not ignore them if all possible completions end in one of | |
1080 | these strings or when displaying a list of completions. | |
1081 | It ignores directory names if they match any string in this list which | |
1082 | ends in a slash. */); | |
14d55bce RS |
1083 | Vcompletion_ignored_extensions = Qnil; |
1084 | } |