| 1 | /* Lisp functions for making directory listings. |
| 2 | Copyright (C) 1985, 1986, 1993, 1994 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GNU Emacs. |
| 5 | |
| 6 | GNU Emacs is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 1, or (at your option) |
| 9 | any later version. |
| 10 | |
| 11 | GNU Emacs is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with GNU Emacs; see the file COPYING. If not, write to |
| 18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 19 | |
| 20 | |
| 21 | #include <config.h> |
| 22 | |
| 23 | #include <stdio.h> |
| 24 | #include <sys/types.h> |
| 25 | #include <sys/stat.h> |
| 26 | |
| 27 | #ifdef VMS |
| 28 | #include <string.h> |
| 29 | #include <rms.h> |
| 30 | #include <rmsdef.h> |
| 31 | #endif |
| 32 | |
| 33 | /* The d_nameln member of a struct dirent includes the '\0' character |
| 34 | on some systems, but not on others. What's worse, you can't tell |
| 35 | at compile-time which one it will be, since it really depends on |
| 36 | the sort of system providing the filesystem you're reading from, |
| 37 | not the system you are running on. Paul Eggert |
| 38 | <eggert@bi.twinsun.com> says this occurs when Emacs is running on a |
| 39 | SunOS 4.1.2 host, reading a directory that is remote-mounted from a |
| 40 | Solaris 2.1 host and is in a native Solaris 2.1 filesystem. |
| 41 | |
| 42 | Since applying strlen to the name always works, we'll just do that. */ |
| 43 | #define NAMLEN(p) strlen (p->d_name) |
| 44 | |
| 45 | #ifdef SYSV_SYSTEM_DIR |
| 46 | |
| 47 | #include <dirent.h> |
| 48 | #define DIRENTRY struct dirent |
| 49 | |
| 50 | #else /* not SYSV_SYSTEM_DIR */ |
| 51 | |
| 52 | #ifdef NONSYSTEM_DIR_LIBRARY |
| 53 | #include "ndir.h" |
| 54 | #else /* not NONSYSTEM_DIR_LIBRARY */ |
| 55 | #ifdef MSDOS |
| 56 | #include <dirent.h> |
| 57 | #else |
| 58 | #include <sys/dir.h> |
| 59 | #endif |
| 60 | #endif /* not NONSYSTEM_DIR_LIBRARY */ |
| 61 | |
| 62 | #ifndef MSDOS |
| 63 | #define DIRENTRY struct direct |
| 64 | |
| 65 | extern DIR *opendir (); |
| 66 | extern struct direct *readdir (); |
| 67 | |
| 68 | #endif /* not MSDOS */ |
| 69 | #endif /* not SYSV_SYSTEM_DIR */ |
| 70 | |
| 71 | #ifdef MSDOS |
| 72 | #define DIRENTRY_NONEMPTY(p) ((p)->d_name[0] != 0) |
| 73 | #else |
| 74 | #define DIRENTRY_NONEMPTY(p) ((p)->d_ino) |
| 75 | #endif |
| 76 | |
| 77 | #include "lisp.h" |
| 78 | #include "buffer.h" |
| 79 | #include "commands.h" |
| 80 | |
| 81 | #include "regex.h" |
| 82 | |
| 83 | /* A search buffer, with a fastmap allocated and ready to go. */ |
| 84 | extern struct re_pattern_buffer searchbuf; |
| 85 | |
| 86 | #define min(a, b) ((a) < (b) ? (a) : (b)) |
| 87 | |
| 88 | /* if system does not have symbolic links, it does not have lstat. |
| 89 | In that case, use ordinary stat instead. */ |
| 90 | |
| 91 | #ifndef S_IFLNK |
| 92 | #define lstat stat |
| 93 | #endif |
| 94 | |
| 95 | extern int completion_ignore_case; |
| 96 | extern Lisp_Object Vcompletion_regexp_list; |
| 97 | |
| 98 | Lisp_Object Vcompletion_ignored_extensions; |
| 99 | Lisp_Object Qcompletion_ignore_case; |
| 100 | Lisp_Object Qdirectory_files; |
| 101 | Lisp_Object Qfile_name_completion; |
| 102 | Lisp_Object Qfile_name_all_completions; |
| 103 | Lisp_Object Qfile_attributes; |
| 104 | \f |
| 105 | DEFUN ("directory-files", Fdirectory_files, Sdirectory_files, 1, 4, 0, |
| 106 | "Return a list of names of files in DIRECTORY.\n\ |
| 107 | There are three optional arguments:\n\ |
| 108 | If FULL is non-nil, absolute pathnames of the files are returned.\n\ |
| 109 | If MATCH is non-nil, only pathnames containing that regexp are returned.\n\ |
| 110 | If NOSORT is non-nil, the list is not sorted--its order is unpredictable.\n\ |
| 111 | NOSORT is useful if you plan to sort the result yourself.") |
| 112 | (dirname, full, match, nosort) |
| 113 | Lisp_Object dirname, full, match, nosort; |
| 114 | { |
| 115 | DIR *d; |
| 116 | int length; |
| 117 | Lisp_Object list, name, dirfilename; |
| 118 | Lisp_Object handler; |
| 119 | |
| 120 | /* If the file name has special constructs in it, |
| 121 | call the corresponding file handler. */ |
| 122 | handler = Ffind_file_name_handler (dirname, Qdirectory_files); |
| 123 | if (!NILP (handler)) |
| 124 | { |
| 125 | Lisp_Object args[6]; |
| 126 | |
| 127 | args[0] = handler; |
| 128 | args[1] = Qdirectory_files; |
| 129 | args[2] = dirname; |
| 130 | args[3] = full; |
| 131 | args[4] = match; |
| 132 | args[5] = nosort; |
| 133 | return Ffuncall (6, args); |
| 134 | } |
| 135 | |
| 136 | { |
| 137 | struct gcpro gcpro1, gcpro2; |
| 138 | |
| 139 | /* Because of file name handlers, these functions might call |
| 140 | Ffuncall, and cause a GC. */ |
| 141 | GCPRO1 (match); |
| 142 | dirname = Fexpand_file_name (dirname, Qnil); |
| 143 | UNGCPRO; |
| 144 | GCPRO2 (match, dirname); |
| 145 | dirfilename = Fdirectory_file_name (dirname); |
| 146 | UNGCPRO; |
| 147 | } |
| 148 | |
| 149 | if (!NILP (match)) |
| 150 | { |
| 151 | CHECK_STRING (match, 3); |
| 152 | |
| 153 | /* MATCH might be a flawed regular expression. Rather than |
| 154 | catching and signalling our own errors, we just call |
| 155 | compile_pattern to do the work for us. */ |
| 156 | #ifdef VMS |
| 157 | compile_pattern (match, &searchbuf, 0, |
| 158 | buffer_defaults.downcase_table->contents); |
| 159 | #else |
| 160 | compile_pattern (match, &searchbuf, 0, 0); |
| 161 | #endif |
| 162 | } |
| 163 | |
| 164 | /* Now searchbuf is the compiled form of MATCH; don't call anything |
| 165 | which might compile a new regexp until we're done with the loop! */ |
| 166 | |
| 167 | /* Do this opendir after anything which might signal an error; if |
| 168 | an error is signalled while the directory stream is open, we |
| 169 | have to make sure it gets closed, and setting up an |
| 170 | unwind_protect to do so would be a pain. */ |
| 171 | d = opendir (XSTRING (dirfilename)->data); |
| 172 | if (! d) |
| 173 | report_file_error ("Opening directory", Fcons (dirname, Qnil)); |
| 174 | |
| 175 | list = Qnil; |
| 176 | length = XSTRING (dirname)->size; |
| 177 | |
| 178 | /* Loop reading blocks */ |
| 179 | while (1) |
| 180 | { |
| 181 | DIRENTRY *dp = readdir (d); |
| 182 | int len; |
| 183 | |
| 184 | if (!dp) break; |
| 185 | len = NAMLEN (dp); |
| 186 | if (DIRENTRY_NONEMPTY (dp)) |
| 187 | { |
| 188 | if (NILP (match) |
| 189 | || (0 <= re_search (&searchbuf, dp->d_name, len, 0, len, 0))) |
| 190 | { |
| 191 | if (!NILP (full)) |
| 192 | { |
| 193 | int index = XSTRING (dirname)->size; |
| 194 | int total = len + index; |
| 195 | #ifndef VMS |
| 196 | if (length == 0 |
| 197 | || XSTRING (dirname)->data[length - 1] != '/') |
| 198 | total++; |
| 199 | #endif /* VMS */ |
| 200 | |
| 201 | name = make_uninit_string (total); |
| 202 | bcopy (XSTRING (dirname)->data, XSTRING (name)->data, |
| 203 | index); |
| 204 | #ifndef VMS |
| 205 | if (length == 0 |
| 206 | || XSTRING (dirname)->data[length - 1] != '/') |
| 207 | XSTRING (name)->data[index++] = '/'; |
| 208 | #endif /* VMS */ |
| 209 | bcopy (dp->d_name, XSTRING (name)->data + index, len); |
| 210 | } |
| 211 | else |
| 212 | name = make_string (dp->d_name, len); |
| 213 | list = Fcons (name, list); |
| 214 | } |
| 215 | } |
| 216 | } |
| 217 | closedir (d); |
| 218 | if (!NILP (nosort)) |
| 219 | return list; |
| 220 | return Fsort (Fnreverse (list), Qstring_lessp); |
| 221 | } |
| 222 | \f |
| 223 | Lisp_Object file_name_completion (); |
| 224 | |
| 225 | DEFUN ("file-name-completion", Ffile_name_completion, Sfile_name_completion, |
| 226 | 2, 2, 0, |
| 227 | "Complete file name FILE in directory DIR.\n\ |
| 228 | Returns the longest string\n\ |
| 229 | common to all filenames in DIR that start with FILE.\n\ |
| 230 | If there is only one and FILE matches it exactly, returns t.\n\ |
| 231 | Returns nil if DIR contains no name starting with FILE.") |
| 232 | (file, dirname) |
| 233 | Lisp_Object file, dirname; |
| 234 | { |
| 235 | Lisp_Object handler; |
| 236 | /* Don't waste time trying to complete a null string. |
| 237 | Besides, this case happens when user is being asked for |
| 238 | a directory name and has supplied one ending in a /. |
| 239 | We would not want to add anything in that case |
| 240 | even if there are some unique characters in that directory. */ |
| 241 | if (STRINGP (file) && XSTRING (file)->size == 0) |
| 242 | return file; |
| 243 | |
| 244 | /* If the file name has special constructs in it, |
| 245 | call the corresponding file handler. */ |
| 246 | handler = Ffind_file_name_handler (dirname, Qfile_name_completion); |
| 247 | if (!NILP (handler)) |
| 248 | return call3 (handler, Qfile_name_completion, file, dirname); |
| 249 | |
| 250 | return file_name_completion (file, dirname, 0, 0); |
| 251 | } |
| 252 | |
| 253 | DEFUN ("file-name-all-completions", Ffile_name_all_completions, |
| 254 | Sfile_name_all_completions, 2, 2, 0, |
| 255 | "Return a list of all completions of file name FILE in directory DIR.\n\ |
| 256 | These are all file names in directory DIR which begin with FILE.") |
| 257 | (file, dirname) |
| 258 | Lisp_Object file, dirname; |
| 259 | { |
| 260 | Lisp_Object handler; |
| 261 | |
| 262 | /* If the file name has special constructs in it, |
| 263 | call the corresponding file handler. */ |
| 264 | handler = Ffind_file_name_handler (dirname, Qfile_name_all_completions); |
| 265 | if (!NILP (handler)) |
| 266 | return call3 (handler, Qfile_name_all_completions, file, dirname); |
| 267 | |
| 268 | return file_name_completion (file, dirname, 1, 0); |
| 269 | } |
| 270 | |
| 271 | Lisp_Object |
| 272 | file_name_completion (file, dirname, all_flag, ver_flag) |
| 273 | Lisp_Object file, dirname; |
| 274 | int all_flag, ver_flag; |
| 275 | { |
| 276 | DIR *d; |
| 277 | DIRENTRY *dp; |
| 278 | int bestmatchsize, skip; |
| 279 | register int compare, matchsize; |
| 280 | unsigned char *p1, *p2; |
| 281 | int matchcount = 0; |
| 282 | Lisp_Object bestmatch, tem, elt, name; |
| 283 | struct stat st; |
| 284 | int directoryp; |
| 285 | int passcount; |
| 286 | int count = specpdl_ptr - specpdl; |
| 287 | struct gcpro gcpro1, gcpro2, gcpro3; |
| 288 | |
| 289 | #ifdef VMS |
| 290 | extern DIRENTRY * readdirver (); |
| 291 | |
| 292 | DIRENTRY *((* readfunc) ()); |
| 293 | |
| 294 | /* Filename completion on VMS ignores case, since VMS filesys does. */ |
| 295 | specbind (Qcompletion_ignore_case, Qt); |
| 296 | |
| 297 | readfunc = readdir; |
| 298 | if (ver_flag) |
| 299 | readfunc = readdirver; |
| 300 | file = Fupcase (file); |
| 301 | #else /* not VMS */ |
| 302 | CHECK_STRING (file, 0); |
| 303 | #endif /* not VMS */ |
| 304 | |
| 305 | #ifdef FILE_SYSTEM_CASE |
| 306 | file = FILE_SYSTEM_CASE (file); |
| 307 | #endif |
| 308 | bestmatch = Qnil; |
| 309 | GCPRO3 (file, dirname, bestmatch); |
| 310 | dirname = Fexpand_file_name (dirname, Qnil); |
| 311 | |
| 312 | /* With passcount = 0, ignore files that end in an ignored extension. |
| 313 | If nothing found then try again with passcount = 1, don't ignore them. |
| 314 | If looking for all completions, start with passcount = 1, |
| 315 | so always take even the ignored ones. |
| 316 | |
| 317 | ** It would not actually be helpful to the user to ignore any possible |
| 318 | completions when making a list of them.** */ |
| 319 | |
| 320 | for (passcount = !!all_flag; NILP (bestmatch) && passcount < 2; passcount++) |
| 321 | { |
| 322 | if (!(d = opendir (XSTRING (Fdirectory_file_name (dirname))->data))) |
| 323 | report_file_error ("Opening directory", Fcons (dirname, Qnil)); |
| 324 | |
| 325 | /* Loop reading blocks */ |
| 326 | /* (att3b compiler bug requires do a null comparison this way) */ |
| 327 | while (1) |
| 328 | { |
| 329 | DIRENTRY *dp; |
| 330 | int len; |
| 331 | |
| 332 | #ifdef VMS |
| 333 | dp = (*readfunc) (d); |
| 334 | #else |
| 335 | dp = readdir (d); |
| 336 | #endif |
| 337 | if (!dp) break; |
| 338 | |
| 339 | len = NAMLEN (dp); |
| 340 | |
| 341 | if (!NILP (Vquit_flag) && NILP (Vinhibit_quit)) |
| 342 | goto quit; |
| 343 | if (! DIRENTRY_NONEMPTY (dp) |
| 344 | || len < XSTRING (file)->size |
| 345 | || 0 <= scmp (dp->d_name, XSTRING (file)->data, |
| 346 | XSTRING (file)->size)) |
| 347 | continue; |
| 348 | |
| 349 | if (file_name_completion_stat (dirname, dp, &st) < 0) |
| 350 | continue; |
| 351 | |
| 352 | directoryp = ((st.st_mode & S_IFMT) == S_IFDIR); |
| 353 | tem = Qnil; |
| 354 | if (!directoryp) |
| 355 | { |
| 356 | /* Compare extensions-to-be-ignored against end of this file name */ |
| 357 | /* if name is not an exact match against specified string */ |
| 358 | if (!passcount && len > XSTRING (file)->size) |
| 359 | /* and exit this for loop if a match is found */ |
| 360 | for (tem = Vcompletion_ignored_extensions; |
| 361 | CONSP (tem); tem = XCONS (tem)->cdr) |
| 362 | { |
| 363 | elt = XCONS (tem)->car; |
| 364 | if (!STRINGP (elt)) continue; |
| 365 | skip = len - XSTRING (elt)->size; |
| 366 | if (skip < 0) continue; |
| 367 | |
| 368 | if (0 <= scmp (dp->d_name + skip, |
| 369 | XSTRING (elt)->data, |
| 370 | XSTRING (elt)->size)) |
| 371 | continue; |
| 372 | break; |
| 373 | } |
| 374 | } |
| 375 | |
| 376 | /* If an ignored-extensions match was found, |
| 377 | don't process this name as a completion. */ |
| 378 | if (!passcount && CONSP (tem)) |
| 379 | continue; |
| 380 | |
| 381 | if (!passcount) |
| 382 | { |
| 383 | Lisp_Object regexps; |
| 384 | Lisp_Object zero; |
| 385 | XSETFASTINT (zero, 0); |
| 386 | |
| 387 | /* Ignore this element if it fails to match all the regexps. */ |
| 388 | for (regexps = Vcompletion_regexp_list; CONSP (regexps); |
| 389 | regexps = XCONS (regexps)->cdr) |
| 390 | { |
| 391 | tem = Fstring_match (XCONS (regexps)->car, elt, zero); |
| 392 | if (NILP (tem)) |
| 393 | break; |
| 394 | } |
| 395 | if (CONSP (regexps)) |
| 396 | continue; |
| 397 | } |
| 398 | |
| 399 | /* Update computation of how much all possible completions match */ |
| 400 | |
| 401 | matchcount++; |
| 402 | |
| 403 | if (all_flag || NILP (bestmatch)) |
| 404 | { |
| 405 | /* This is a possible completion */ |
| 406 | if (directoryp) |
| 407 | { |
| 408 | /* This completion is a directory; make it end with '/' */ |
| 409 | name = Ffile_name_as_directory (make_string (dp->d_name, len)); |
| 410 | } |
| 411 | else |
| 412 | name = make_string (dp->d_name, len); |
| 413 | if (all_flag) |
| 414 | { |
| 415 | bestmatch = Fcons (name, bestmatch); |
| 416 | } |
| 417 | else |
| 418 | { |
| 419 | bestmatch = name; |
| 420 | bestmatchsize = XSTRING (name)->size; |
| 421 | } |
| 422 | } |
| 423 | else |
| 424 | { |
| 425 | compare = min (bestmatchsize, len); |
| 426 | p1 = XSTRING (bestmatch)->data; |
| 427 | p2 = (unsigned char *) dp->d_name; |
| 428 | matchsize = scmp(p1, p2, compare); |
| 429 | if (matchsize < 0) |
| 430 | matchsize = compare; |
| 431 | if (completion_ignore_case) |
| 432 | { |
| 433 | /* If this is an exact match except for case, |
| 434 | use it as the best match rather than one that is not |
| 435 | an exact match. This way, we get the case pattern |
| 436 | of the actual match. */ |
| 437 | if ((matchsize == len |
| 438 | && matchsize + !!directoryp |
| 439 | < XSTRING (bestmatch)->size) |
| 440 | || |
| 441 | /* If there is no exact match ignoring case, |
| 442 | prefer a match that does not change the case |
| 443 | of the input. */ |
| 444 | (((matchsize == len) |
| 445 | == |
| 446 | (matchsize + !!directoryp |
| 447 | == XSTRING (bestmatch)->size)) |
| 448 | /* If there is more than one exact match aside from |
| 449 | case, and one of them is exact including case, |
| 450 | prefer that one. */ |
| 451 | && !bcmp (p2, XSTRING (file)->data, XSTRING (file)->size) |
| 452 | && bcmp (p1, XSTRING (file)->data, XSTRING (file)->size))) |
| 453 | { |
| 454 | bestmatch = make_string (dp->d_name, len); |
| 455 | if (directoryp) |
| 456 | bestmatch = Ffile_name_as_directory (bestmatch); |
| 457 | } |
| 458 | } |
| 459 | |
| 460 | /* If this dirname all matches, see if implicit following |
| 461 | slash does too. */ |
| 462 | if (directoryp |
| 463 | && compare == matchsize |
| 464 | && bestmatchsize > matchsize |
| 465 | && p1[matchsize] == '/') |
| 466 | matchsize++; |
| 467 | bestmatchsize = matchsize; |
| 468 | } |
| 469 | } |
| 470 | closedir (d); |
| 471 | } |
| 472 | |
| 473 | UNGCPRO; |
| 474 | bestmatch = unbind_to (count, bestmatch); |
| 475 | |
| 476 | if (all_flag || NILP (bestmatch)) |
| 477 | return bestmatch; |
| 478 | if (matchcount == 1 && bestmatchsize == XSTRING (file)->size) |
| 479 | return Qt; |
| 480 | return Fsubstring (bestmatch, make_number (0), make_number (bestmatchsize)); |
| 481 | quit: |
| 482 | if (d) closedir (d); |
| 483 | Vquit_flag = Qnil; |
| 484 | return Fsignal (Qquit, Qnil); |
| 485 | } |
| 486 | |
| 487 | file_name_completion_stat (dirname, dp, st_addr) |
| 488 | Lisp_Object dirname; |
| 489 | DIRENTRY *dp; |
| 490 | struct stat *st_addr; |
| 491 | { |
| 492 | int len = NAMLEN (dp); |
| 493 | int pos = XSTRING (dirname)->size; |
| 494 | int value; |
| 495 | char *fullname = (char *) alloca (len + pos + 2); |
| 496 | |
| 497 | bcopy (XSTRING (dirname)->data, fullname, pos); |
| 498 | #ifndef VMS |
| 499 | if (fullname[pos - 1] != '/') |
| 500 | fullname[pos++] = '/'; |
| 501 | #endif |
| 502 | |
| 503 | bcopy (dp->d_name, fullname + pos, len); |
| 504 | fullname[pos + len] = 0; |
| 505 | |
| 506 | #ifdef S_IFLNK |
| 507 | /* We want to return success if a link points to a nonexistent file, |
| 508 | but we want to return the status for what the link points to, |
| 509 | in case it is a directory. */ |
| 510 | value = lstat (fullname, st_addr); |
| 511 | stat (fullname, st_addr); |
| 512 | return value; |
| 513 | #else |
| 514 | return stat (fullname, st_addr); |
| 515 | #endif |
| 516 | } |
| 517 | \f |
| 518 | #ifdef VMS |
| 519 | |
| 520 | DEFUN ("file-name-all-versions", Ffile_name_all_versions, |
| 521 | Sfile_name_all_versions, 2, 2, 0, |
| 522 | "Return a list of all versions of file name FILE in directory DIR.") |
| 523 | (file, dirname) |
| 524 | Lisp_Object file, dirname; |
| 525 | { |
| 526 | return file_name_completion (file, dirname, 1, 1); |
| 527 | } |
| 528 | |
| 529 | DEFUN ("file-version-limit", Ffile_version_limit, Sfile_version_limit, 1, 1, 0, |
| 530 | "Return the maximum number of versions allowed for FILE.\n\ |
| 531 | Returns nil if the file cannot be opened or if there is no version limit.") |
| 532 | (filename) |
| 533 | Lisp_Object filename; |
| 534 | { |
| 535 | Lisp_Object retval; |
| 536 | struct FAB fab; |
| 537 | struct RAB rab; |
| 538 | struct XABFHC xabfhc; |
| 539 | int status; |
| 540 | |
| 541 | filename = Fexpand_file_name (filename, Qnil); |
| 542 | fab = cc$rms_fab; |
| 543 | xabfhc = cc$rms_xabfhc; |
| 544 | fab.fab$l_fna = XSTRING (filename)->data; |
| 545 | fab.fab$b_fns = strlen (fab.fab$l_fna); |
| 546 | fab.fab$l_xab = (char *) &xabfhc; |
| 547 | status = sys$open (&fab, 0, 0); |
| 548 | if (status != RMS$_NORMAL) /* Probably non-existent file */ |
| 549 | return Qnil; |
| 550 | sys$close (&fab, 0, 0); |
| 551 | if (xabfhc.xab$w_verlimit == 32767) |
| 552 | return Qnil; /* No version limit */ |
| 553 | else |
| 554 | return make_number (xabfhc.xab$w_verlimit); |
| 555 | } |
| 556 | |
| 557 | #endif /* VMS */ |
| 558 | \f |
| 559 | Lisp_Object |
| 560 | make_time (time) |
| 561 | int time; |
| 562 | { |
| 563 | return Fcons (make_number (time >> 16), |
| 564 | Fcons (make_number (time & 0177777), Qnil)); |
| 565 | } |
| 566 | |
| 567 | DEFUN ("file-attributes", Ffile_attributes, Sfile_attributes, 1, 1, 0, |
| 568 | "Return a list of attributes of file FILENAME.\n\ |
| 569 | Value is nil if specified file cannot be opened.\n\ |
| 570 | Otherwise, list elements are:\n\ |
| 571 | 0. t for directory, string (name linked to) for symbolic link, or nil.\n\ |
| 572 | 1. Number of links to file.\n\ |
| 573 | 2. File uid.\n\ |
| 574 | 3. File gid.\n\ |
| 575 | 4. Last access time, as a list of two integers.\n\ |
| 576 | First integer has high-order 16 bits of time, second has low 16 bits.\n\ |
| 577 | 5. Last modification time, likewise.\n\ |
| 578 | 6. Last status change time, likewise.\n\ |
| 579 | 7. Size in bytes (-1, if number is out of range).\n\ |
| 580 | 8. File modes, as a string of ten letters or dashes as in ls -l.\n\ |
| 581 | 9. t iff file's gid would change if file were deleted and recreated.\n\ |
| 582 | 10. inode number.\n\ |
| 583 | 11. Device number.\n\ |
| 584 | \n\ |
| 585 | If file does not exist, returns nil.") |
| 586 | (filename) |
| 587 | Lisp_Object filename; |
| 588 | { |
| 589 | Lisp_Object values[12]; |
| 590 | Lisp_Object dirname; |
| 591 | struct stat s; |
| 592 | struct stat sdir; |
| 593 | char modes[10]; |
| 594 | Lisp_Object handler; |
| 595 | |
| 596 | filename = Fexpand_file_name (filename, Qnil); |
| 597 | |
| 598 | /* If the file name has special constructs in it, |
| 599 | call the corresponding file handler. */ |
| 600 | handler = Ffind_file_name_handler (filename, Qfile_attributes); |
| 601 | if (!NILP (handler)) |
| 602 | return call2 (handler, Qfile_attributes, filename); |
| 603 | |
| 604 | if (lstat (XSTRING (filename)->data, &s) < 0) |
| 605 | return Qnil; |
| 606 | |
| 607 | #ifdef MSDOS |
| 608 | { |
| 609 | char *tmpnam = XSTRING (Ffile_name_nondirectory (filename))->data; |
| 610 | int l = strlen (tmpnam); |
| 611 | |
| 612 | if (l >= 5 |
| 613 | && S_ISREG (s.st_mode) |
| 614 | && (stricmp (&tmpnam[l - 4], ".com") == 0 |
| 615 | || stricmp (&tmpnam[l - 4], ".exe") == 0 |
| 616 | || stricmp (&tmpnam[l - 4], ".bat") == 0)) |
| 617 | { |
| 618 | s.st_mode |= S_IEXEC; |
| 619 | } |
| 620 | } |
| 621 | #endif /* MSDOS */ |
| 622 | |
| 623 | switch (s.st_mode & S_IFMT) |
| 624 | { |
| 625 | default: |
| 626 | values[0] = Qnil; break; |
| 627 | case S_IFDIR: |
| 628 | values[0] = Qt; break; |
| 629 | #ifdef S_IFLNK |
| 630 | case S_IFLNK: |
| 631 | values[0] = Ffile_symlink_p (filename); break; |
| 632 | #endif |
| 633 | } |
| 634 | values[1] = make_number (s.st_nlink); |
| 635 | values[2] = make_number (s.st_uid); |
| 636 | values[3] = make_number (s.st_gid); |
| 637 | values[4] = make_time (s.st_atime); |
| 638 | values[5] = make_time (s.st_mtime); |
| 639 | values[6] = make_time (s.st_ctime); |
| 640 | values[7] = make_number ((int) s.st_size); |
| 641 | /* If the size is out of range, give back -1. */ |
| 642 | if (XINT (values[7]) != s.st_size) |
| 643 | XSETINT (values[7], -1); |
| 644 | filemodestring (&s, modes); |
| 645 | values[8] = make_string (modes, 10); |
| 646 | #ifdef BSD4_3 /* Gross kludge to avoid lack of "#if defined(...)" in VMS */ |
| 647 | #define BSD4_2 /* A new meaning to the term `backwards compatibility' */ |
| 648 | #endif |
| 649 | #ifdef BSD4_2 /* file gid will be dir gid */ |
| 650 | dirname = Ffile_name_directory (filename); |
| 651 | if (! NILP (dirname) && stat (XSTRING (dirname)->data, &sdir) == 0) |
| 652 | values[9] = (sdir.st_gid != s.st_gid) ? Qt : Qnil; |
| 653 | else /* if we can't tell, assume worst */ |
| 654 | values[9] = Qt; |
| 655 | #else /* file gid will be egid */ |
| 656 | values[9] = (s.st_gid != getegid ()) ? Qt : Qnil; |
| 657 | #endif /* BSD4_2 (or BSD4_3) */ |
| 658 | #ifdef BSD4_3 |
| 659 | #undef BSD4_2 /* ok, you can look again without throwing up */ |
| 660 | #endif |
| 661 | values[10] = make_number (s.st_ino); |
| 662 | values[11] = make_number (s.st_dev); |
| 663 | return Flist (sizeof(values) / sizeof(values[0]), values); |
| 664 | } |
| 665 | \f |
| 666 | syms_of_dired () |
| 667 | { |
| 668 | Qdirectory_files = intern ("directory-files"); |
| 669 | Qfile_name_completion = intern ("file-name-completion"); |
| 670 | Qfile_name_all_completions = intern ("file-name-all-completions"); |
| 671 | Qfile_attributes = intern ("file-attributes"); |
| 672 | |
| 673 | defsubr (&Sdirectory_files); |
| 674 | defsubr (&Sfile_name_completion); |
| 675 | #ifdef VMS |
| 676 | defsubr (&Sfile_name_all_versions); |
| 677 | defsubr (&Sfile_version_limit); |
| 678 | #endif /* VMS */ |
| 679 | defsubr (&Sfile_name_all_completions); |
| 680 | defsubr (&Sfile_attributes); |
| 681 | |
| 682 | #ifdef VMS |
| 683 | Qcompletion_ignore_case = intern ("completion-ignore-case"); |
| 684 | staticpro (&Qcompletion_ignore_case); |
| 685 | #endif /* VMS */ |
| 686 | |
| 687 | DEFVAR_LISP ("completion-ignored-extensions", &Vcompletion_ignored_extensions, |
| 688 | "*Completion ignores filenames ending in any string in this list.\n\ |
| 689 | This variable does not affect lists of possible completions,\n\ |
| 690 | but does affect the commands that actually do completions."); |
| 691 | Vcompletion_ignored_extensions = Qnil; |
| 692 | } |