| 1 | /* Lisp functions for making directory listings. |
| 2 | Copyright (C) 1985, 1986, 1993, 1994, 1999, 2000, 2001, 2002, 2003, |
| 3 | 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GNU Emacs. |
| 6 | |
| 7 | GNU Emacs is free software: you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation, either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | GNU Emacs is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | |
| 21 | #include <config.h> |
| 22 | |
| 23 | #include <stdio.h> |
| 24 | #include <sys/types.h> |
| 25 | #include <sys/stat.h> |
| 26 | #include <setjmp.h> |
| 27 | |
| 28 | #ifdef HAVE_PWD_H |
| 29 | #include <pwd.h> |
| 30 | #endif |
| 31 | #include <grp.h> |
| 32 | |
| 33 | #include <errno.h> |
| 34 | |
| 35 | #ifdef HAVE_UNISTD_H |
| 36 | #include <unistd.h> |
| 37 | #endif |
| 38 | |
| 39 | /* The d_nameln member of a struct dirent includes the '\0' character |
| 40 | on some systems, but not on others. What's worse, you can't tell |
| 41 | at compile-time which one it will be, since it really depends on |
| 42 | the sort of system providing the filesystem you're reading from, |
| 43 | not the system you are running on. Paul Eggert |
| 44 | <eggert@bi.twinsun.com> says this occurs when Emacs is running on a |
| 45 | SunOS 4.1.2 host, reading a directory that is remote-mounted from a |
| 46 | Solaris 2.1 host and is in a native Solaris 2.1 filesystem. |
| 47 | |
| 48 | Since applying strlen to the name always works, we'll just do that. */ |
| 49 | #define NAMLEN(p) strlen (p->d_name) |
| 50 | |
| 51 | #ifdef SYSV_SYSTEM_DIR |
| 52 | |
| 53 | #include <dirent.h> |
| 54 | #define DIRENTRY struct dirent |
| 55 | |
| 56 | #else /* not SYSV_SYSTEM_DIR */ |
| 57 | |
| 58 | #ifdef MSDOS |
| 59 | #include <dirent.h> |
| 60 | #else |
| 61 | #include <sys/dir.h> |
| 62 | #endif |
| 63 | |
| 64 | #include <sys/stat.h> |
| 65 | |
| 66 | #ifndef MSDOS |
| 67 | #define DIRENTRY struct direct |
| 68 | |
| 69 | extern DIR *opendir (); |
| 70 | extern struct direct *readdir (); |
| 71 | |
| 72 | #endif /* not MSDOS */ |
| 73 | #endif /* not SYSV_SYSTEM_DIR */ |
| 74 | |
| 75 | /* Some versions of Cygwin don't have d_ino in `struct dirent'. */ |
| 76 | #if defined(MSDOS) || defined(__CYGWIN__) |
| 77 | #define DIRENTRY_NONEMPTY(p) ((p)->d_name[0] != 0) |
| 78 | #else |
| 79 | #define DIRENTRY_NONEMPTY(p) ((p)->d_ino) |
| 80 | #endif |
| 81 | |
| 82 | #include "lisp.h" |
| 83 | #include "systime.h" |
| 84 | #include "buffer.h" |
| 85 | #include "commands.h" |
| 86 | #include "character.h" |
| 87 | #include "charset.h" |
| 88 | #include "coding.h" |
| 89 | #include "regex.h" |
| 90 | #include "blockinput.h" |
| 91 | |
| 92 | /* Returns a search buffer, with a fastmap allocated and ready to go. */ |
| 93 | extern struct re_pattern_buffer *compile_pattern (); |
| 94 | |
| 95 | /* From filemode.c. Can't go in Lisp.h because of `stat'. */ |
| 96 | extern void filemodestring P_ ((struct stat *, char *)); |
| 97 | |
| 98 | /* if system does not have symbolic links, it does not have lstat. |
| 99 | In that case, use ordinary stat instead. */ |
| 100 | |
| 101 | #ifndef S_IFLNK |
| 102 | #define lstat stat |
| 103 | #endif |
| 104 | |
| 105 | extern int completion_ignore_case; |
| 106 | extern Lisp_Object Qcompletion_ignore_case; |
| 107 | extern Lisp_Object Vcompletion_regexp_list; |
| 108 | extern Lisp_Object Vw32_get_true_file_attributes; |
| 109 | |
| 110 | Lisp_Object Vcompletion_ignored_extensions; |
| 111 | Lisp_Object Qdirectory_files; |
| 112 | Lisp_Object Qdirectory_files_and_attributes; |
| 113 | Lisp_Object Qfile_name_completion; |
| 114 | Lisp_Object Qfile_name_all_completions; |
| 115 | Lisp_Object Qfile_attributes; |
| 116 | Lisp_Object Qfile_attributes_lessp; |
| 117 | |
| 118 | static int scmp P_ ((unsigned char *, unsigned char *, int)); |
| 119 | \f |
| 120 | #ifdef WINDOWSNT |
| 121 | Lisp_Object |
| 122 | directory_files_internal_w32_unwind (Lisp_Object arg) |
| 123 | { |
| 124 | Vw32_get_true_file_attributes = arg; |
| 125 | return Qnil; |
| 126 | } |
| 127 | #endif |
| 128 | |
| 129 | Lisp_Object |
| 130 | directory_files_internal_unwind (dh) |
| 131 | Lisp_Object dh; |
| 132 | { |
| 133 | DIR *d = (DIR *) XSAVE_VALUE (dh)->pointer; |
| 134 | BLOCK_INPUT; |
| 135 | closedir (d); |
| 136 | UNBLOCK_INPUT; |
| 137 | return Qnil; |
| 138 | } |
| 139 | |
| 140 | /* Function shared by Fdirectory_files and Fdirectory_files_and_attributes. |
| 141 | When ATTRS is zero, return a list of directory filenames; when |
| 142 | non-zero, return a list of directory filenames and their attributes. |
| 143 | In the latter case, ID_FORMAT is passed to Ffile_attributes. */ |
| 144 | |
| 145 | Lisp_Object |
| 146 | directory_files_internal (directory, full, match, nosort, attrs, id_format) |
| 147 | Lisp_Object directory, full, match, nosort; |
| 148 | int attrs; |
| 149 | Lisp_Object id_format; |
| 150 | { |
| 151 | DIR *d; |
| 152 | int directory_nbytes; |
| 153 | Lisp_Object list, dirfilename, encoded_directory; |
| 154 | struct re_pattern_buffer *bufp = NULL; |
| 155 | int needsep = 0; |
| 156 | int count = SPECPDL_INDEX (); |
| 157 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
| 158 | DIRENTRY *dp; |
| 159 | #ifdef WINDOWSNT |
| 160 | Lisp_Object w32_save = Qnil; |
| 161 | #endif |
| 162 | |
| 163 | /* Because of file name handlers, these functions might call |
| 164 | Ffuncall, and cause a GC. */ |
| 165 | list = encoded_directory = dirfilename = Qnil; |
| 166 | GCPRO5 (match, directory, list, dirfilename, encoded_directory); |
| 167 | dirfilename = Fdirectory_file_name (directory); |
| 168 | |
| 169 | if (!NILP (match)) |
| 170 | { |
| 171 | CHECK_STRING (match); |
| 172 | |
| 173 | /* MATCH might be a flawed regular expression. Rather than |
| 174 | catching and signaling our own errors, we just call |
| 175 | compile_pattern to do the work for us. */ |
| 176 | /* Pass 1 for the MULTIBYTE arg |
| 177 | because we do make multibyte strings if the contents warrant. */ |
| 178 | # ifdef WINDOWSNT |
| 179 | /* Windows users want case-insensitive wildcards. */ |
| 180 | bufp = compile_pattern (match, 0, |
| 181 | buffer_defaults.case_canon_table, 0, 1); |
| 182 | # else /* !WINDOWSNT */ |
| 183 | bufp = compile_pattern (match, 0, Qnil, 0, 1); |
| 184 | # endif /* !WINDOWSNT */ |
| 185 | } |
| 186 | |
| 187 | /* Note: ENCODE_FILE and DECODE_FILE can GC because they can run |
| 188 | run_pre_post_conversion_on_str which calls Lisp directly and |
| 189 | indirectly. */ |
| 190 | if (STRING_MULTIBYTE (dirfilename)) |
| 191 | dirfilename = ENCODE_FILE (dirfilename); |
| 192 | encoded_directory = (STRING_MULTIBYTE (directory) |
| 193 | ? ENCODE_FILE (directory) : directory); |
| 194 | |
| 195 | /* Now *bufp is the compiled form of MATCH; don't call anything |
| 196 | which might compile a new regexp until we're done with the loop! */ |
| 197 | |
| 198 | BLOCK_INPUT; |
| 199 | d = opendir (SDATA (dirfilename)); |
| 200 | UNBLOCK_INPUT; |
| 201 | if (d == NULL) |
| 202 | report_file_error ("Opening directory", Fcons (directory, Qnil)); |
| 203 | |
| 204 | /* Unfortunately, we can now invoke expand-file-name and |
| 205 | file-attributes on filenames, both of which can throw, so we must |
| 206 | do a proper unwind-protect. */ |
| 207 | record_unwind_protect (directory_files_internal_unwind, |
| 208 | make_save_value (d, 0)); |
| 209 | |
| 210 | #ifdef WINDOWSNT |
| 211 | if (attrs) |
| 212 | { |
| 213 | extern Lisp_Object Qlocal; |
| 214 | extern int is_slow_fs (const char *); |
| 215 | |
| 216 | /* Do this only once to avoid doing it (in w32.c:stat) for each |
| 217 | file in the directory, when we call Ffile_attributes below. */ |
| 218 | record_unwind_protect (directory_files_internal_w32_unwind, |
| 219 | Vw32_get_true_file_attributes); |
| 220 | w32_save = Vw32_get_true_file_attributes; |
| 221 | if (EQ (Vw32_get_true_file_attributes, Qlocal)) |
| 222 | { |
| 223 | /* w32.c:stat will notice these bindings and avoid calling |
| 224 | GetDriveType for each file. */ |
| 225 | if (is_slow_fs (SDATA (dirfilename))) |
| 226 | Vw32_get_true_file_attributes = Qnil; |
| 227 | else |
| 228 | Vw32_get_true_file_attributes = Qt; |
| 229 | } |
| 230 | } |
| 231 | #endif |
| 232 | |
| 233 | directory_nbytes = SBYTES (directory); |
| 234 | re_match_object = Qt; |
| 235 | |
| 236 | /* Decide whether we need to add a directory separator. */ |
| 237 | if (directory_nbytes == 0 |
| 238 | || !IS_ANY_SEP (SREF (directory, directory_nbytes - 1))) |
| 239 | needsep = 1; |
| 240 | |
| 241 | /* Loop reading blocks until EOF or error. */ |
| 242 | for (;;) |
| 243 | { |
| 244 | errno = 0; |
| 245 | dp = readdir (d); |
| 246 | |
| 247 | if (dp == NULL && (0 |
| 248 | #ifdef EAGAIN |
| 249 | || errno == EAGAIN |
| 250 | #endif |
| 251 | #ifdef EINTR |
| 252 | || errno == EINTR |
| 253 | #endif |
| 254 | )) |
| 255 | { QUIT; continue; } |
| 256 | |
| 257 | if (dp == NULL) |
| 258 | break; |
| 259 | |
| 260 | if (DIRENTRY_NONEMPTY (dp)) |
| 261 | { |
| 262 | int len; |
| 263 | int wanted = 0; |
| 264 | Lisp_Object name, finalname; |
| 265 | struct gcpro gcpro1, gcpro2; |
| 266 | |
| 267 | len = NAMLEN (dp); |
| 268 | name = finalname = make_unibyte_string (dp->d_name, len); |
| 269 | GCPRO2 (finalname, name); |
| 270 | |
| 271 | /* Note: DECODE_FILE can GC; it should protect its argument, |
| 272 | though. */ |
| 273 | name = DECODE_FILE (name); |
| 274 | len = SBYTES (name); |
| 275 | |
| 276 | /* Now that we have unwind_protect in place, we might as well |
| 277 | allow matching to be interrupted. */ |
| 278 | immediate_quit = 1; |
| 279 | QUIT; |
| 280 | |
| 281 | if (NILP (match) |
| 282 | || (0 <= re_search (bufp, SDATA (name), len, 0, len, 0))) |
| 283 | wanted = 1; |
| 284 | |
| 285 | immediate_quit = 0; |
| 286 | |
| 287 | if (wanted) |
| 288 | { |
| 289 | if (!NILP (full)) |
| 290 | { |
| 291 | Lisp_Object fullname; |
| 292 | int nbytes = len + directory_nbytes + needsep; |
| 293 | int nchars; |
| 294 | |
| 295 | fullname = make_uninit_multibyte_string (nbytes, nbytes); |
| 296 | bcopy (SDATA (directory), SDATA (fullname), |
| 297 | directory_nbytes); |
| 298 | |
| 299 | if (needsep) |
| 300 | SSET (fullname, directory_nbytes, DIRECTORY_SEP); |
| 301 | |
| 302 | bcopy (SDATA (name), |
| 303 | SDATA (fullname) + directory_nbytes + needsep, |
| 304 | len); |
| 305 | |
| 306 | nchars = chars_in_text (SDATA (fullname), nbytes); |
| 307 | |
| 308 | /* Some bug somewhere. */ |
| 309 | if (nchars > nbytes) |
| 310 | abort (); |
| 311 | |
| 312 | STRING_SET_CHARS (fullname, nchars); |
| 313 | if (nchars == nbytes) |
| 314 | STRING_SET_UNIBYTE (fullname); |
| 315 | |
| 316 | finalname = fullname; |
| 317 | } |
| 318 | else |
| 319 | finalname = name; |
| 320 | |
| 321 | if (attrs) |
| 322 | { |
| 323 | /* Construct an expanded filename for the directory entry. |
| 324 | Use the decoded names for input to Ffile_attributes. */ |
| 325 | Lisp_Object decoded_fullname, fileattrs; |
| 326 | struct gcpro gcpro1, gcpro2; |
| 327 | |
| 328 | decoded_fullname = fileattrs = Qnil; |
| 329 | GCPRO2 (decoded_fullname, fileattrs); |
| 330 | |
| 331 | /* Both Fexpand_file_name and Ffile_attributes can GC. */ |
| 332 | decoded_fullname = Fexpand_file_name (name, directory); |
| 333 | fileattrs = Ffile_attributes (decoded_fullname, id_format); |
| 334 | |
| 335 | list = Fcons (Fcons (finalname, fileattrs), list); |
| 336 | UNGCPRO; |
| 337 | } |
| 338 | else |
| 339 | list = Fcons (finalname, list); |
| 340 | } |
| 341 | |
| 342 | UNGCPRO; |
| 343 | } |
| 344 | } |
| 345 | |
| 346 | BLOCK_INPUT; |
| 347 | closedir (d); |
| 348 | UNBLOCK_INPUT; |
| 349 | #ifdef WINDOWSNT |
| 350 | if (attrs) |
| 351 | Vw32_get_true_file_attributes = w32_save; |
| 352 | #endif |
| 353 | |
| 354 | /* Discard the unwind protect. */ |
| 355 | specpdl_ptr = specpdl + count; |
| 356 | |
| 357 | if (NILP (nosort)) |
| 358 | list = Fsort (Fnreverse (list), |
| 359 | attrs ? Qfile_attributes_lessp : Qstring_lessp); |
| 360 | |
| 361 | RETURN_UNGCPRO (list); |
| 362 | } |
| 363 | |
| 364 | |
| 365 | DEFUN ("directory-files", Fdirectory_files, Sdirectory_files, 1, 4, 0, |
| 366 | doc: /* Return a list of names of files in DIRECTORY. |
| 367 | There are three optional arguments: |
| 368 | If FULL is non-nil, return absolute file names. Otherwise return names |
| 369 | that are relative to the specified directory. |
| 370 | If MATCH is non-nil, mention only file names that match the regexp MATCH. |
| 371 | If NOSORT is non-nil, the list is not sorted--its order is unpredictable. |
| 372 | Otherwise, the list returned is sorted with `string-lessp'. |
| 373 | NOSORT is useful if you plan to sort the result yourself. */) |
| 374 | (directory, full, match, nosort) |
| 375 | Lisp_Object directory, full, match, nosort; |
| 376 | { |
| 377 | Lisp_Object handler; |
| 378 | directory = Fexpand_file_name (directory, Qnil); |
| 379 | |
| 380 | /* If the file name has special constructs in it, |
| 381 | call the corresponding file handler. */ |
| 382 | handler = Ffind_file_name_handler (directory, Qdirectory_files); |
| 383 | if (!NILP (handler)) |
| 384 | return call5 (handler, Qdirectory_files, directory, |
| 385 | full, match, nosort); |
| 386 | |
| 387 | return directory_files_internal (directory, full, match, nosort, 0, Qnil); |
| 388 | } |
| 389 | |
| 390 | DEFUN ("directory-files-and-attributes", Fdirectory_files_and_attributes, |
| 391 | Sdirectory_files_and_attributes, 1, 5, 0, |
| 392 | doc: /* Return a list of names of files and their attributes in DIRECTORY. |
| 393 | There are four optional arguments: |
| 394 | If FULL is non-nil, return absolute file names. Otherwise return names |
| 395 | that are relative to the specified directory. |
| 396 | If MATCH is non-nil, mention only file names that match the regexp MATCH. |
| 397 | If NOSORT is non-nil, the list is not sorted--its order is unpredictable. |
| 398 | NOSORT is useful if you plan to sort the result yourself. |
| 399 | ID-FORMAT specifies the preferred format of attributes uid and gid, see |
| 400 | `file-attributes' for further documentation. |
| 401 | On MS-Windows, performance depends on `w32-get-true-file-attributes', |
| 402 | which see. */) |
| 403 | (directory, full, match, nosort, id_format) |
| 404 | Lisp_Object directory, full, match, nosort, id_format; |
| 405 | { |
| 406 | Lisp_Object handler; |
| 407 | directory = Fexpand_file_name (directory, Qnil); |
| 408 | |
| 409 | /* If the file name has special constructs in it, |
| 410 | call the corresponding file handler. */ |
| 411 | handler = Ffind_file_name_handler (directory, Qdirectory_files_and_attributes); |
| 412 | if (!NILP (handler)) |
| 413 | return call6 (handler, Qdirectory_files_and_attributes, |
| 414 | directory, full, match, nosort, id_format); |
| 415 | |
| 416 | return directory_files_internal (directory, full, match, nosort, 1, id_format); |
| 417 | } |
| 418 | |
| 419 | \f |
| 420 | Lisp_Object file_name_completion (); |
| 421 | |
| 422 | DEFUN ("file-name-completion", Ffile_name_completion, Sfile_name_completion, |
| 423 | 2, 3, 0, |
| 424 | doc: /* Complete file name FILE in directory DIRECTORY. |
| 425 | Returns the longest string |
| 426 | common to all file names in DIRECTORY that start with FILE. |
| 427 | If there is only one and FILE matches it exactly, returns t. |
| 428 | Returns nil if DIRECTORY contains no name starting with FILE. |
| 429 | |
| 430 | If PREDICATE is non-nil, call PREDICATE with each possible |
| 431 | completion (in absolute form) and ignore it if PREDICATE returns nil. |
| 432 | |
| 433 | This function ignores some of the possible completions as |
| 434 | determined by the variable `completion-ignored-extensions', which see. */) |
| 435 | (file, directory, predicate) |
| 436 | Lisp_Object file, directory, predicate; |
| 437 | { |
| 438 | Lisp_Object handler; |
| 439 | |
| 440 | /* If the directory name has special constructs in it, |
| 441 | call the corresponding file handler. */ |
| 442 | handler = Ffind_file_name_handler (directory, Qfile_name_completion); |
| 443 | if (!NILP (handler)) |
| 444 | return call4 (handler, Qfile_name_completion, file, directory, predicate); |
| 445 | |
| 446 | /* If the file name has special constructs in it, |
| 447 | call the corresponding file handler. */ |
| 448 | handler = Ffind_file_name_handler (file, Qfile_name_completion); |
| 449 | if (!NILP (handler)) |
| 450 | return call4 (handler, Qfile_name_completion, file, directory, predicate); |
| 451 | |
| 452 | return file_name_completion (file, directory, 0, 0, predicate); |
| 453 | } |
| 454 | |
| 455 | DEFUN ("file-name-all-completions", Ffile_name_all_completions, |
| 456 | Sfile_name_all_completions, 2, 2, 0, |
| 457 | doc: /* Return a list of all completions of file name FILE in directory DIRECTORY. |
| 458 | These are all file names in directory DIRECTORY which begin with FILE. */) |
| 459 | (file, directory) |
| 460 | Lisp_Object file, directory; |
| 461 | { |
| 462 | Lisp_Object handler; |
| 463 | |
| 464 | /* If the directory name has special constructs in it, |
| 465 | call the corresponding file handler. */ |
| 466 | handler = Ffind_file_name_handler (directory, Qfile_name_all_completions); |
| 467 | if (!NILP (handler)) |
| 468 | return call3 (handler, Qfile_name_all_completions, file, directory); |
| 469 | |
| 470 | /* If the file name has special constructs in it, |
| 471 | call the corresponding file handler. */ |
| 472 | handler = Ffind_file_name_handler (file, Qfile_name_all_completions); |
| 473 | if (!NILP (handler)) |
| 474 | return call3 (handler, Qfile_name_all_completions, file, directory); |
| 475 | |
| 476 | return file_name_completion (file, directory, 1, 0, Qnil); |
| 477 | } |
| 478 | |
| 479 | static int file_name_completion_stat (); |
| 480 | Lisp_Object Qdefault_directory; |
| 481 | |
| 482 | Lisp_Object |
| 483 | file_name_completion (file, dirname, all_flag, ver_flag, predicate) |
| 484 | Lisp_Object file, dirname; |
| 485 | int all_flag, ver_flag; |
| 486 | Lisp_Object predicate; |
| 487 | { |
| 488 | DIR *d; |
| 489 | int bestmatchsize = 0; |
| 490 | int matchcount = 0; |
| 491 | /* If ALL_FLAG is 1, BESTMATCH is the list of all matches, decoded. |
| 492 | If ALL_FLAG is 0, BESTMATCH is either nil |
| 493 | or the best match so far, not decoded. */ |
| 494 | Lisp_Object bestmatch, tem, elt, name; |
| 495 | Lisp_Object encoded_file; |
| 496 | Lisp_Object encoded_dir; |
| 497 | struct stat st; |
| 498 | int directoryp; |
| 499 | /* If includeall is zero, exclude files in completion-ignored-extensions as |
| 500 | well as "." and "..". Until shown otherwise, assume we can't exclude |
| 501 | anything. */ |
| 502 | int includeall = 1; |
| 503 | int count = SPECPDL_INDEX (); |
| 504 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
| 505 | |
| 506 | elt = Qnil; |
| 507 | |
| 508 | CHECK_STRING (file); |
| 509 | |
| 510 | #ifdef FILE_SYSTEM_CASE |
| 511 | file = FILE_SYSTEM_CASE (file); |
| 512 | #endif |
| 513 | bestmatch = Qnil; |
| 514 | encoded_file = encoded_dir = Qnil; |
| 515 | GCPRO5 (file, dirname, bestmatch, encoded_file, encoded_dir); |
| 516 | dirname = Fexpand_file_name (dirname, Qnil); |
| 517 | specbind (Qdefault_directory, dirname); |
| 518 | |
| 519 | /* Do completion on the encoded file name |
| 520 | because the other names in the directory are (we presume) |
| 521 | encoded likewise. We decode the completed string at the end. */ |
| 522 | /* Actually, this is not quite true any more: we do most of the completion |
| 523 | work with decoded file names, but we still do some filtering based |
| 524 | on the encoded file name. */ |
| 525 | encoded_file = STRING_MULTIBYTE (file) ? ENCODE_FILE (file) : file; |
| 526 | |
| 527 | encoded_dir = ENCODE_FILE (dirname); |
| 528 | |
| 529 | BLOCK_INPUT; |
| 530 | d = opendir (SDATA (Fdirectory_file_name (encoded_dir))); |
| 531 | UNBLOCK_INPUT; |
| 532 | if (!d) |
| 533 | report_file_error ("Opening directory", Fcons (dirname, Qnil)); |
| 534 | |
| 535 | record_unwind_protect (directory_files_internal_unwind, |
| 536 | make_save_value (d, 0)); |
| 537 | |
| 538 | /* Loop reading blocks */ |
| 539 | /* (att3b compiler bug requires do a null comparison this way) */ |
| 540 | while (1) |
| 541 | { |
| 542 | DIRENTRY *dp; |
| 543 | int len; |
| 544 | int canexclude = 0; |
| 545 | |
| 546 | errno = 0; |
| 547 | dp = readdir (d); |
| 548 | if (dp == NULL && (0 |
| 549 | # ifdef EAGAIN |
| 550 | || errno == EAGAIN |
| 551 | # endif |
| 552 | # ifdef EINTR |
| 553 | || errno == EINTR |
| 554 | # endif |
| 555 | )) |
| 556 | { QUIT; continue; } |
| 557 | |
| 558 | if (!dp) break; |
| 559 | |
| 560 | len = NAMLEN (dp); |
| 561 | |
| 562 | QUIT; |
| 563 | if (! DIRENTRY_NONEMPTY (dp) |
| 564 | || len < SCHARS (encoded_file) |
| 565 | || 0 <= scmp (dp->d_name, SDATA (encoded_file), |
| 566 | SCHARS (encoded_file))) |
| 567 | continue; |
| 568 | |
| 569 | if (file_name_completion_stat (encoded_dir, dp, &st) < 0) |
| 570 | continue; |
| 571 | |
| 572 | directoryp = ((st.st_mode & S_IFMT) == S_IFDIR); |
| 573 | tem = Qnil; |
| 574 | /* If all_flag is set, always include all. |
| 575 | It would not actually be helpful to the user to ignore any possible |
| 576 | completions when making a list of them. */ |
| 577 | if (!all_flag) |
| 578 | { |
| 579 | int skip; |
| 580 | |
| 581 | #if 0 /* FIXME: The `scmp' call compares an encoded and a decoded string. */ |
| 582 | /* If this entry matches the current bestmatch, the only |
| 583 | thing it can do is increase matchcount, so don't bother |
| 584 | investigating it any further. */ |
| 585 | if (!completion_ignore_case |
| 586 | /* The return result depends on whether it's the sole match. */ |
| 587 | && matchcount > 1 |
| 588 | && !includeall /* This match may allow includeall to 0. */ |
| 589 | && len >= bestmatchsize |
| 590 | && 0 > scmp (dp->d_name, SDATA (bestmatch), bestmatchsize)) |
| 591 | continue; |
| 592 | #endif |
| 593 | |
| 594 | if (directoryp) |
| 595 | { |
| 596 | #ifndef TRIVIAL_DIRECTORY_ENTRY |
| 597 | #define TRIVIAL_DIRECTORY_ENTRY(n) (!strcmp (n, ".") || !strcmp (n, "..")) |
| 598 | #endif |
| 599 | /* "." and ".." are never interesting as completions, and are |
| 600 | actually in the way in a directory with only one file. */ |
| 601 | if (TRIVIAL_DIRECTORY_ENTRY (dp->d_name)) |
| 602 | canexclude = 1; |
| 603 | else if (len > SCHARS (encoded_file)) |
| 604 | /* Ignore directories if they match an element of |
| 605 | completion-ignored-extensions which ends in a slash. */ |
| 606 | for (tem = Vcompletion_ignored_extensions; |
| 607 | CONSP (tem); tem = XCDR (tem)) |
| 608 | { |
| 609 | int elt_len; |
| 610 | unsigned char *p1; |
| 611 | |
| 612 | elt = XCAR (tem); |
| 613 | if (!STRINGP (elt)) |
| 614 | continue; |
| 615 | /* Need to encode ELT, since scmp compares unibyte |
| 616 | strings only. */ |
| 617 | elt = ENCODE_FILE (elt); |
| 618 | elt_len = SCHARS (elt) - 1; /* -1 for trailing / */ |
| 619 | if (elt_len <= 0) |
| 620 | continue; |
| 621 | p1 = SDATA (elt); |
| 622 | if (p1[elt_len] != '/') |
| 623 | continue; |
| 624 | skip = len - elt_len; |
| 625 | if (skip < 0) |
| 626 | continue; |
| 627 | |
| 628 | if (0 <= scmp (dp->d_name + skip, p1, elt_len)) |
| 629 | continue; |
| 630 | break; |
| 631 | } |
| 632 | } |
| 633 | else |
| 634 | { |
| 635 | /* Compare extensions-to-be-ignored against end of this file name */ |
| 636 | /* if name is not an exact match against specified string */ |
| 637 | if (len > SCHARS (encoded_file)) |
| 638 | /* and exit this for loop if a match is found */ |
| 639 | for (tem = Vcompletion_ignored_extensions; |
| 640 | CONSP (tem); tem = XCDR (tem)) |
| 641 | { |
| 642 | elt = XCAR (tem); |
| 643 | if (!STRINGP (elt)) continue; |
| 644 | /* Need to encode ELT, since scmp compares unibyte |
| 645 | strings only. */ |
| 646 | elt = ENCODE_FILE (elt); |
| 647 | skip = len - SCHARS (elt); |
| 648 | if (skip < 0) continue; |
| 649 | |
| 650 | if (0 <= scmp (dp->d_name + skip, |
| 651 | SDATA (elt), |
| 652 | SCHARS (elt))) |
| 653 | continue; |
| 654 | break; |
| 655 | } |
| 656 | } |
| 657 | |
| 658 | /* If an ignored-extensions match was found, |
| 659 | don't process this name as a completion. */ |
| 660 | if (CONSP (tem)) |
| 661 | canexclude = 1; |
| 662 | |
| 663 | if (!includeall && canexclude) |
| 664 | /* We're not including all files and this file can be excluded. */ |
| 665 | continue; |
| 666 | |
| 667 | if (includeall && !canexclude) |
| 668 | { /* If we have one non-excludable file, we want to exclude the |
| 669 | excudable files. */ |
| 670 | includeall = 0; |
| 671 | /* Throw away any previous excludable match found. */ |
| 672 | bestmatch = Qnil; |
| 673 | bestmatchsize = 0; |
| 674 | matchcount = 0; |
| 675 | } |
| 676 | } |
| 677 | /* FIXME: If we move this `decode' earlier we can eliminate |
| 678 | the repeated ENCODE_FILE on Vcompletion_ignored_extensions. */ |
| 679 | name = make_unibyte_string (dp->d_name, len); |
| 680 | name = DECODE_FILE (name); |
| 681 | |
| 682 | { |
| 683 | Lisp_Object regexps; |
| 684 | Lisp_Object zero; |
| 685 | XSETFASTINT (zero, 0); |
| 686 | |
| 687 | /* Ignore this element if it fails to match all the regexps. */ |
| 688 | if (completion_ignore_case) |
| 689 | { |
| 690 | for (regexps = Vcompletion_regexp_list; CONSP (regexps); |
| 691 | regexps = XCDR (regexps)) |
| 692 | if (fast_string_match_ignore_case (XCAR (regexps), name) < 0) |
| 693 | break; |
| 694 | } |
| 695 | else |
| 696 | { |
| 697 | for (regexps = Vcompletion_regexp_list; CONSP (regexps); |
| 698 | regexps = XCDR (regexps)) |
| 699 | if (fast_string_match (XCAR (regexps), name) < 0) |
| 700 | break; |
| 701 | } |
| 702 | |
| 703 | if (CONSP (regexps)) |
| 704 | continue; |
| 705 | } |
| 706 | |
| 707 | /* This is a possible completion */ |
| 708 | if (directoryp) |
| 709 | /* This completion is a directory; make it end with '/'. */ |
| 710 | name = Ffile_name_as_directory (name); |
| 711 | |
| 712 | /* Test the predicate, if any. */ |
| 713 | if (!NILP (predicate)) |
| 714 | { |
| 715 | Lisp_Object val; |
| 716 | struct gcpro gcpro1; |
| 717 | |
| 718 | GCPRO1 (name); |
| 719 | val = call1 (predicate, name); |
| 720 | UNGCPRO; |
| 721 | |
| 722 | if (NILP (val)) |
| 723 | continue; |
| 724 | } |
| 725 | |
| 726 | /* Suitably record this match. */ |
| 727 | |
| 728 | matchcount++; |
| 729 | |
| 730 | if (all_flag) |
| 731 | bestmatch = Fcons (name, bestmatch); |
| 732 | else if (NILP (bestmatch)) |
| 733 | { |
| 734 | bestmatch = name; |
| 735 | bestmatchsize = SCHARS (name); |
| 736 | } |
| 737 | else |
| 738 | { |
| 739 | Lisp_Object zero = make_number (0); |
| 740 | /* FIXME: This is a copy of the code in Ftry_completion. */ |
| 741 | int compare = min (bestmatchsize, SCHARS (name)); |
| 742 | Lisp_Object tem |
| 743 | = Fcompare_strings (bestmatch, zero, |
| 744 | make_number (compare), |
| 745 | name, zero, |
| 746 | make_number (compare), |
| 747 | completion_ignore_case ? Qt : Qnil); |
| 748 | int matchsize |
| 749 | = (EQ (tem, Qt) ? compare |
| 750 | : XINT (tem) < 0 ? - XINT (tem) - 1 |
| 751 | : XINT (tem) - 1); |
| 752 | |
| 753 | if (completion_ignore_case) |
| 754 | { |
| 755 | /* If this is an exact match except for case, |
| 756 | use it as the best match rather than one that is not |
| 757 | an exact match. This way, we get the case pattern |
| 758 | of the actual match. */ |
| 759 | /* This tests that the current file is an exact match |
| 760 | but BESTMATCH is not (it is too long). */ |
| 761 | if ((matchsize == SCHARS (name) |
| 762 | && matchsize + !!directoryp < SCHARS (bestmatch)) |
| 763 | || |
| 764 | /* If there is no exact match ignoring case, |
| 765 | prefer a match that does not change the case |
| 766 | of the input. */ |
| 767 | /* If there is more than one exact match aside from |
| 768 | case, and one of them is exact including case, |
| 769 | prefer that one. */ |
| 770 | /* This == checks that, of current file and BESTMATCH, |
| 771 | either both or neither are exact. */ |
| 772 | (((matchsize == SCHARS (name)) |
| 773 | == |
| 774 | (matchsize + !!directoryp == SCHARS (bestmatch))) |
| 775 | && (tem = Fcompare_strings (name, zero, |
| 776 | make_number (SCHARS (file)), |
| 777 | file, zero, |
| 778 | Qnil, |
| 779 | Qnil), |
| 780 | EQ (Qt, tem)) |
| 781 | && (tem = Fcompare_strings (bestmatch, zero, |
| 782 | make_number (SCHARS (file)), |
| 783 | file, zero, |
| 784 | Qnil, |
| 785 | Qnil), |
| 786 | ! EQ (Qt, tem)))) |
| 787 | bestmatch = name; |
| 788 | } |
| 789 | bestmatchsize = matchsize; |
| 790 | |
| 791 | /* If the best completion so far is reduced to the string |
| 792 | we're trying to complete, then we already know there's no |
| 793 | other completion, so there's no point looking any further. */ |
| 794 | if (matchsize <= SCHARS (file) |
| 795 | && !includeall /* A future match may allow includeall to 0. */ |
| 796 | /* If completion-ignore-case is non-nil, don't |
| 797 | short-circuit because we want to find the best |
| 798 | possible match *including* case differences. */ |
| 799 | && (!completion_ignore_case || matchsize == 0) |
| 800 | /* The return value depends on whether it's the sole match. */ |
| 801 | && matchcount > 1) |
| 802 | break; |
| 803 | |
| 804 | } |
| 805 | } |
| 806 | |
| 807 | UNGCPRO; |
| 808 | /* This closes the directory. */ |
| 809 | bestmatch = unbind_to (count, bestmatch); |
| 810 | |
| 811 | if (all_flag || NILP (bestmatch)) |
| 812 | return bestmatch; |
| 813 | /* Return t if the supplied string is an exact match (counting case); |
| 814 | it does not require any change to be made. */ |
| 815 | if (matchcount == 1 && !NILP (Fequal (bestmatch, file))) |
| 816 | return Qt; |
| 817 | bestmatch = Fsubstring (bestmatch, make_number (0), |
| 818 | make_number (bestmatchsize)); |
| 819 | return bestmatch; |
| 820 | } |
| 821 | |
| 822 | /* Compare exactly LEN chars of strings at S1 and S2, |
| 823 | ignoring case if appropriate. |
| 824 | Return -1 if strings match, |
| 825 | else number of chars that match at the beginning. */ |
| 826 | |
| 827 | static int |
| 828 | scmp (s1, s2, len) |
| 829 | register unsigned char *s1, *s2; |
| 830 | int len; |
| 831 | { |
| 832 | register int l = len; |
| 833 | |
| 834 | if (completion_ignore_case) |
| 835 | { |
| 836 | while (l && DOWNCASE (*s1++) == DOWNCASE (*s2++)) |
| 837 | l--; |
| 838 | } |
| 839 | else |
| 840 | { |
| 841 | while (l && *s1++ == *s2++) |
| 842 | l--; |
| 843 | } |
| 844 | if (l == 0) |
| 845 | return -1; |
| 846 | else |
| 847 | return len - l; |
| 848 | } |
| 849 | |
| 850 | static int |
| 851 | file_name_completion_stat (dirname, dp, st_addr) |
| 852 | Lisp_Object dirname; |
| 853 | DIRENTRY *dp; |
| 854 | struct stat *st_addr; |
| 855 | { |
| 856 | int len = NAMLEN (dp); |
| 857 | int pos = SCHARS (dirname); |
| 858 | int value; |
| 859 | char *fullname = (char *) alloca (len + pos + 2); |
| 860 | |
| 861 | #ifdef MSDOS |
| 862 | #if __DJGPP__ > 1 |
| 863 | /* Some fields of struct stat are *very* expensive to compute on MS-DOS, |
| 864 | but aren't required here. Avoid computing the following fields: |
| 865 | st_inode, st_size and st_nlink for directories, and the execute bits |
| 866 | in st_mode for non-directory files with non-standard extensions. */ |
| 867 | |
| 868 | unsigned short save_djstat_flags = _djstat_flags; |
| 869 | |
| 870 | _djstat_flags = _STAT_INODE | _STAT_EXEC_MAGIC | _STAT_DIRSIZE; |
| 871 | #endif /* __DJGPP__ > 1 */ |
| 872 | #endif /* MSDOS */ |
| 873 | |
| 874 | bcopy (SDATA (dirname), fullname, pos); |
| 875 | if (!IS_DIRECTORY_SEP (fullname[pos - 1])) |
| 876 | fullname[pos++] = DIRECTORY_SEP; |
| 877 | |
| 878 | bcopy (dp->d_name, fullname + pos, len); |
| 879 | fullname[pos + len] = 0; |
| 880 | |
| 881 | #ifdef S_IFLNK |
| 882 | /* We want to return success if a link points to a nonexistent file, |
| 883 | but we want to return the status for what the link points to, |
| 884 | in case it is a directory. */ |
| 885 | value = lstat (fullname, st_addr); |
| 886 | stat (fullname, st_addr); |
| 887 | return value; |
| 888 | #else |
| 889 | value = stat (fullname, st_addr); |
| 890 | #ifdef MSDOS |
| 891 | #if __DJGPP__ > 1 |
| 892 | _djstat_flags = save_djstat_flags; |
| 893 | #endif /* __DJGPP__ > 1 */ |
| 894 | #endif /* MSDOS */ |
| 895 | return value; |
| 896 | #endif /* S_IFLNK */ |
| 897 | } |
| 898 | \f |
| 899 | Lisp_Object |
| 900 | make_time (time) |
| 901 | time_t time; |
| 902 | { |
| 903 | return Fcons (make_number (time >> 16), |
| 904 | Fcons (make_number (time & 0177777), Qnil)); |
| 905 | } |
| 906 | |
| 907 | static char * |
| 908 | stat_uname (struct stat *st) |
| 909 | { |
| 910 | #ifdef WINDOWSNT |
| 911 | return st->st_uname; |
| 912 | #else |
| 913 | struct passwd *pw = (struct passwd *) getpwuid (st->st_uid); |
| 914 | |
| 915 | if (pw) |
| 916 | return pw->pw_name; |
| 917 | else |
| 918 | return NULL; |
| 919 | #endif |
| 920 | } |
| 921 | |
| 922 | static char * |
| 923 | stat_gname (struct stat *st) |
| 924 | { |
| 925 | #ifdef WINDOWSNT |
| 926 | return st->st_gname; |
| 927 | #else |
| 928 | struct group *gr = (struct group *) getgrgid (st->st_gid); |
| 929 | |
| 930 | if (gr) |
| 931 | return gr->gr_name; |
| 932 | else |
| 933 | return NULL; |
| 934 | #endif |
| 935 | } |
| 936 | |
| 937 | /* Make an integer or float number for UID and GID, while being |
| 938 | careful not to produce negative numbers due to signed integer |
| 939 | overflow. */ |
| 940 | static Lisp_Object |
| 941 | make_uid (struct stat *st) |
| 942 | { |
| 943 | EMACS_INT uid = st->st_uid; |
| 944 | |
| 945 | if (sizeof (st->st_uid) > sizeof (uid) || uid < 0 || FIXNUM_OVERFLOW_P (uid)) |
| 946 | return make_float ((double)st->st_uid); |
| 947 | return make_number (uid); |
| 948 | } |
| 949 | |
| 950 | static Lisp_Object |
| 951 | make_gid (struct stat *st) |
| 952 | { |
| 953 | EMACS_INT gid = st->st_gid; |
| 954 | |
| 955 | if (sizeof (st->st_gid) > sizeof (gid) || gid < 0 || FIXNUM_OVERFLOW_P (gid)) |
| 956 | return make_float ((double)st->st_gid); |
| 957 | return make_number (gid); |
| 958 | } |
| 959 | |
| 960 | DEFUN ("file-attributes", Ffile_attributes, Sfile_attributes, 1, 2, 0, |
| 961 | doc: /* Return a list of attributes of file FILENAME. |
| 962 | Value is nil if specified file cannot be opened. |
| 963 | |
| 964 | ID-FORMAT specifies the preferred format of attributes uid and gid (see |
| 965 | below) - valid values are 'string and 'integer. The latter is the default, |
| 966 | but we plan to change that, so you should specify a non-nil value for |
| 967 | ID-FORMAT if you use the returned uid or gid. |
| 968 | |
| 969 | Elements of the attribute list are: |
| 970 | 0. t for directory, string (name linked to) for symbolic link, or nil. |
| 971 | 1. Number of links to file. |
| 972 | 2. File uid as a string or a number. If a string value cannot be |
| 973 | looked up, a numeric value, either an integer or a float, is returned. |
| 974 | 3. File gid, likewise. |
| 975 | 4. Last access time, as a list of two integers. |
| 976 | First integer has high-order 16 bits of time, second has low 16 bits. |
| 977 | (See a note below about access time on FAT-based filesystems.) |
| 978 | 5. Last modification time, likewise. This is the time of the last |
| 979 | change to the file's contents. |
| 980 | 6. Last status change time, likewise. This is the time of last change |
| 981 | to the file's attributes: owner and group, access mode bits, etc. |
| 982 | 7. Size in bytes. |
| 983 | This is a floating point number if the size is too large for an integer. |
| 984 | 8. File modes, as a string of ten letters or dashes as in ls -l. |
| 985 | 9. t if file's gid would change if file were deleted and recreated. |
| 986 | 10. inode number. If inode number is larger than what Emacs integer |
| 987 | can hold, but still fits into a 32-bit number, this is a cons cell |
| 988 | containing two integers: first the high part, then the low 16 bits. |
| 989 | If the inode number is wider than 32 bits, this is of the form |
| 990 | (HIGH MIDDLE . LOW): first the high 24 bits, then middle 24 bits, |
| 991 | and finally the low 16 bits. |
| 992 | 11. Filesystem device number. If it is larger than what the Emacs |
| 993 | integer can hold, this is a cons cell, similar to the inode number. |
| 994 | |
| 995 | On most filesystems, the combination of the inode and the device |
| 996 | number uniquely identifies the file. |
| 997 | |
| 998 | On MS-Windows, performance depends on `w32-get-true-file-attributes', |
| 999 | which see. |
| 1000 | |
| 1001 | On some FAT-based filesystems, only the date of last access is recorded, |
| 1002 | so last access time will always be midnight of that day. */) |
| 1003 | (filename, id_format) |
| 1004 | Lisp_Object filename, id_format; |
| 1005 | { |
| 1006 | Lisp_Object values[12]; |
| 1007 | Lisp_Object encoded; |
| 1008 | struct stat s; |
| 1009 | #if defined (BSD4_2) || defined (BSD4_3) |
| 1010 | Lisp_Object dirname; |
| 1011 | struct stat sdir; |
| 1012 | #endif |
| 1013 | char modes[10]; |
| 1014 | Lisp_Object handler; |
| 1015 | struct gcpro gcpro1; |
| 1016 | EMACS_INT ino, uid, gid; |
| 1017 | char *uname = NULL, *gname = NULL; |
| 1018 | |
| 1019 | filename = Fexpand_file_name (filename, Qnil); |
| 1020 | |
| 1021 | /* If the file name has special constructs in it, |
| 1022 | call the corresponding file handler. */ |
| 1023 | handler = Ffind_file_name_handler (filename, Qfile_attributes); |
| 1024 | if (!NILP (handler)) |
| 1025 | { /* Only pass the extra arg if it is used to help backward compatibility |
| 1026 | with old file handlers which do not implement the new arg. --Stef */ |
| 1027 | if (NILP (id_format)) |
| 1028 | return call2 (handler, Qfile_attributes, filename); |
| 1029 | else |
| 1030 | return call3 (handler, Qfile_attributes, filename, id_format); |
| 1031 | } |
| 1032 | |
| 1033 | GCPRO1 (filename); |
| 1034 | encoded = ENCODE_FILE (filename); |
| 1035 | UNGCPRO; |
| 1036 | |
| 1037 | if (lstat (SDATA (encoded), &s) < 0) |
| 1038 | return Qnil; |
| 1039 | |
| 1040 | switch (s.st_mode & S_IFMT) |
| 1041 | { |
| 1042 | default: |
| 1043 | values[0] = Qnil; break; |
| 1044 | case S_IFDIR: |
| 1045 | values[0] = Qt; break; |
| 1046 | #ifdef S_IFLNK |
| 1047 | case S_IFLNK: |
| 1048 | values[0] = Ffile_symlink_p (filename); break; |
| 1049 | #endif |
| 1050 | } |
| 1051 | values[1] = make_number (s.st_nlink); |
| 1052 | |
| 1053 | if (!(NILP (id_format) || EQ (id_format, Qinteger))) |
| 1054 | { |
| 1055 | BLOCK_INPUT; |
| 1056 | uname = stat_uname (&s); |
| 1057 | gname = stat_gname (&s); |
| 1058 | UNBLOCK_INPUT; |
| 1059 | } |
| 1060 | if (uname) |
| 1061 | values[2] = DECODE_SYSTEM (build_string (uname)); |
| 1062 | else |
| 1063 | values[2] = make_uid (&s); |
| 1064 | if (gname) |
| 1065 | values[3] = DECODE_SYSTEM (build_string (gname)); |
| 1066 | else |
| 1067 | values[3] = make_gid (&s); |
| 1068 | |
| 1069 | values[4] = make_time (s.st_atime); |
| 1070 | values[5] = make_time (s.st_mtime); |
| 1071 | values[6] = make_time (s.st_ctime); |
| 1072 | values[7] = make_number (s.st_size); |
| 1073 | /* If the size is out of range for an integer, return a float. */ |
| 1074 | if (XINT (values[7]) != s.st_size) |
| 1075 | values[7] = make_float ((double)s.st_size); |
| 1076 | /* If the size is negative, and its type is long, convert it back to |
| 1077 | positive. */ |
| 1078 | if (s.st_size < 0 && sizeof (s.st_size) == sizeof (long)) |
| 1079 | values[7] = make_float ((double) ((unsigned long) s.st_size)); |
| 1080 | |
| 1081 | filemodestring (&s, modes); |
| 1082 | values[8] = make_string (modes, 10); |
| 1083 | #if defined (BSD4_2) || defined (BSD4_3) /* file gid will be dir gid */ |
| 1084 | dirname = Ffile_name_directory (filename); |
| 1085 | if (! NILP (dirname)) |
| 1086 | encoded = ENCODE_FILE (dirname); |
| 1087 | if (! NILP (dirname) && stat (SDATA (encoded), &sdir) == 0) |
| 1088 | values[9] = (sdir.st_gid != s.st_gid) ? Qt : Qnil; |
| 1089 | else /* if we can't tell, assume worst */ |
| 1090 | values[9] = Qt; |
| 1091 | #else /* file gid will be egid */ |
| 1092 | values[9] = (s.st_gid != getegid ()) ? Qt : Qnil; |
| 1093 | #endif /* BSD4_2 (or BSD4_3) */ |
| 1094 | /* Shut up GCC warnings in FIXNUM_OVERFLOW_P below. */ |
| 1095 | if (sizeof (s.st_ino) > sizeof (ino)) |
| 1096 | ino = (EMACS_INT)(s.st_ino & 0xffffffff); |
| 1097 | else |
| 1098 | ino = s.st_ino; |
| 1099 | if (!FIXNUM_OVERFLOW_P (ino) |
| 1100 | && (sizeof (s.st_ino) <= sizeof (ino) || (s.st_ino & ~INTMASK) == 0)) |
| 1101 | /* Keep the most common cases as integers. */ |
| 1102 | values[10] = make_number (ino); |
| 1103 | else if (sizeof (s.st_ino) <= sizeof (ino) |
| 1104 | || ((s.st_ino >> 16) & ~INTMASK) == 0) |
| 1105 | /* To allow inode numbers larger than VALBITS, separate the bottom |
| 1106 | 16 bits. */ |
| 1107 | values[10] = Fcons (make_number ((EMACS_INT)(s.st_ino >> 16)), |
| 1108 | make_number ((EMACS_INT)(s.st_ino & 0xffff))); |
| 1109 | else |
| 1110 | { |
| 1111 | /* To allow inode numbers beyond 32 bits, separate into 2 24-bit |
| 1112 | high parts and a 16-bit bottom part. |
| 1113 | The code on the next line avoids a compiler warning on |
| 1114 | systems where st_ino is 32 bit wide. (bug#766). */ |
| 1115 | EMACS_INT high_ino = s.st_ino >> 31 >> 1; |
| 1116 | EMACS_INT low_ino = s.st_ino & 0xffffffff; |
| 1117 | |
| 1118 | values[10] = Fcons (make_number (high_ino >> 8), |
| 1119 | Fcons (make_number (((high_ino & 0xff) << 16) |
| 1120 | + (low_ino >> 16)), |
| 1121 | make_number (low_ino & 0xffff))); |
| 1122 | } |
| 1123 | |
| 1124 | /* Likewise for device, but don't let it become negative. We used |
| 1125 | to use FIXNUM_OVERFLOW_P here, but that won't catch large |
| 1126 | positive numbers such as 0xFFEEDDCC. */ |
| 1127 | if ((EMACS_INT)s.st_dev < 0 |
| 1128 | || (EMACS_INT)s.st_dev > MOST_POSITIVE_FIXNUM) |
| 1129 | values[11] = Fcons (make_number (s.st_dev >> 16), |
| 1130 | make_number (s.st_dev & 0xffff)); |
| 1131 | else |
| 1132 | values[11] = make_number (s.st_dev); |
| 1133 | |
| 1134 | return Flist (sizeof(values) / sizeof(values[0]), values); |
| 1135 | } |
| 1136 | |
| 1137 | DEFUN ("file-attributes-lessp", Ffile_attributes_lessp, Sfile_attributes_lessp, 2, 2, 0, |
| 1138 | doc: /* Return t if first arg file attributes list is less than second. |
| 1139 | Comparison is in lexicographic order and case is significant. */) |
| 1140 | (f1, f2) |
| 1141 | Lisp_Object f1, f2; |
| 1142 | { |
| 1143 | return Fstring_lessp (Fcar (f1), Fcar (f2)); |
| 1144 | } |
| 1145 | \f |
| 1146 | void |
| 1147 | syms_of_dired () |
| 1148 | { |
| 1149 | Qdirectory_files = intern ("directory-files"); |
| 1150 | Qdirectory_files_and_attributes = intern ("directory-files-and-attributes"); |
| 1151 | Qfile_name_completion = intern ("file-name-completion"); |
| 1152 | Qfile_name_all_completions = intern ("file-name-all-completions"); |
| 1153 | Qfile_attributes = intern ("file-attributes"); |
| 1154 | Qfile_attributes_lessp = intern ("file-attributes-lessp"); |
| 1155 | Qdefault_directory = intern ("default-directory"); |
| 1156 | |
| 1157 | staticpro (&Qdirectory_files); |
| 1158 | staticpro (&Qdirectory_files_and_attributes); |
| 1159 | staticpro (&Qfile_name_completion); |
| 1160 | staticpro (&Qfile_name_all_completions); |
| 1161 | staticpro (&Qfile_attributes); |
| 1162 | staticpro (&Qfile_attributes_lessp); |
| 1163 | staticpro (&Qdefault_directory); |
| 1164 | |
| 1165 | defsubr (&Sdirectory_files); |
| 1166 | defsubr (&Sdirectory_files_and_attributes); |
| 1167 | defsubr (&Sfile_name_completion); |
| 1168 | defsubr (&Sfile_name_all_completions); |
| 1169 | defsubr (&Sfile_attributes); |
| 1170 | defsubr (&Sfile_attributes_lessp); |
| 1171 | |
| 1172 | DEFVAR_LISP ("completion-ignored-extensions", &Vcompletion_ignored_extensions, |
| 1173 | doc: /* Completion ignores file names ending in any string in this list. |
| 1174 | It does not ignore them if all possible completions end in one of |
| 1175 | these strings or when displaying a list of completions. |
| 1176 | It ignores directory names if they match any string in this list which |
| 1177 | ends in a slash. */); |
| 1178 | Vcompletion_ignored_extensions = Qnil; |
| 1179 | } |
| 1180 | |
| 1181 | /* arch-tag: 1ac8deca-4d8f-4d41-ade9-089154d98c03 |
| 1182 | (do not change this comment) */ |