| 1 | /* Lisp functions for making directory listings. |
| 2 | Copyright (C) 1985, 1986, 1993, 1994, 1999, 2000, 2001 |
| 3 | 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 2, or (at your option) |
| 10 | 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; see the file COPYING. If not, write to |
| 19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 20 | Boston, MA 02111-1307, USA. */ |
| 21 | |
| 22 | |
| 23 | #include <config.h> |
| 24 | |
| 25 | #include <stdio.h> |
| 26 | #include <sys/types.h> |
| 27 | #include <sys/stat.h> |
| 28 | |
| 29 | #include "systime.h" |
| 30 | |
| 31 | #ifdef VMS |
| 32 | #include <string.h> |
| 33 | #include <rms.h> |
| 34 | #include <rmsdef.h> |
| 35 | #endif |
| 36 | |
| 37 | #ifdef HAVE_UNISTD_H |
| 38 | #include <unistd.h> |
| 39 | #endif |
| 40 | |
| 41 | /* The d_nameln member of a struct dirent includes the '\0' character |
| 42 | on some systems, but not on others. What's worse, you can't tell |
| 43 | at compile-time which one it will be, since it really depends on |
| 44 | the sort of system providing the filesystem you're reading from, |
| 45 | not the system you are running on. Paul Eggert |
| 46 | <eggert@bi.twinsun.com> says this occurs when Emacs is running on a |
| 47 | SunOS 4.1.2 host, reading a directory that is remote-mounted from a |
| 48 | Solaris 2.1 host and is in a native Solaris 2.1 filesystem. |
| 49 | |
| 50 | Since applying strlen to the name always works, we'll just do that. */ |
| 51 | #define NAMLEN(p) strlen (p->d_name) |
| 52 | |
| 53 | #ifdef SYSV_SYSTEM_DIR |
| 54 | |
| 55 | #include <dirent.h> |
| 56 | #define DIRENTRY struct dirent |
| 57 | |
| 58 | #else /* not SYSV_SYSTEM_DIR */ |
| 59 | |
| 60 | #ifdef NONSYSTEM_DIR_LIBRARY |
| 61 | #include "ndir.h" |
| 62 | #else /* not NONSYSTEM_DIR_LIBRARY */ |
| 63 | #ifdef MSDOS |
| 64 | #include <dirent.h> |
| 65 | #else |
| 66 | #include <sys/dir.h> |
| 67 | #endif |
| 68 | #endif /* not NONSYSTEM_DIR_LIBRARY */ |
| 69 | |
| 70 | #include <sys/stat.h> |
| 71 | |
| 72 | #ifndef MSDOS |
| 73 | #define DIRENTRY struct direct |
| 74 | |
| 75 | extern DIR *opendir (); |
| 76 | extern struct direct *readdir (); |
| 77 | |
| 78 | #endif /* not MSDOS */ |
| 79 | #endif /* not SYSV_SYSTEM_DIR */ |
| 80 | |
| 81 | #ifdef MSDOS |
| 82 | #define DIRENTRY_NONEMPTY(p) ((p)->d_name[0] != 0) |
| 83 | #else |
| 84 | #define DIRENTRY_NONEMPTY(p) ((p)->d_ino) |
| 85 | #endif |
| 86 | |
| 87 | #include "lisp.h" |
| 88 | #include "buffer.h" |
| 89 | #include "commands.h" |
| 90 | #include "charset.h" |
| 91 | #include "coding.h" |
| 92 | #include "regex.h" |
| 93 | |
| 94 | /* Returns a search buffer, with a fastmap allocated and ready to go. */ |
| 95 | extern struct re_pattern_buffer *compile_pattern (); |
| 96 | |
| 97 | /* From filemode.c. Can't go in Lisp.h because of `stat'. */ |
| 98 | extern void filemodestring P_ ((struct stat *, char *)); |
| 99 | |
| 100 | #define min(a, b) ((a) < (b) ? (a) : (b)) |
| 101 | |
| 102 | /* if system does not have symbolic links, it does not have lstat. |
| 103 | In that case, use ordinary stat instead. */ |
| 104 | |
| 105 | #ifndef S_IFLNK |
| 106 | #define lstat stat |
| 107 | #endif |
| 108 | |
| 109 | extern int completion_ignore_case; |
| 110 | extern Lisp_Object Vcompletion_regexp_list; |
| 111 | extern Lisp_Object Vfile_name_coding_system, Vdefault_file_name_coding_system; |
| 112 | |
| 113 | Lisp_Object Vcompletion_ignored_extensions; |
| 114 | Lisp_Object Qcompletion_ignore_case; |
| 115 | Lisp_Object Qdirectory_files; |
| 116 | Lisp_Object Qdirectory_files_and_attributes; |
| 117 | Lisp_Object Qfile_name_completion; |
| 118 | Lisp_Object Qfile_name_all_completions; |
| 119 | Lisp_Object Qfile_attributes; |
| 120 | Lisp_Object Qfile_attributes_lessp; |
| 121 | \f |
| 122 | |
| 123 | Lisp_Object |
| 124 | directory_files_internal_unwind (dh) |
| 125 | Lisp_Object dh; |
| 126 | { |
| 127 | DIR *d = (DIR *) ((XINT (XCAR (dh)) << 16) + XINT (XCDR (dh))); |
| 128 | closedir (d); |
| 129 | return Qnil; |
| 130 | } |
| 131 | |
| 132 | /* Function shared by Fdirectory_files and Fdirectory_files_and_attributes. |
| 133 | When ATTRS is zero, return a list of directory filenames; when |
| 134 | non-zero, return a list of directory filenames and their attributes. */ |
| 135 | Lisp_Object |
| 136 | directory_files_internal (directory, full, match, nosort, attrs) |
| 137 | Lisp_Object directory, full, match, nosort; |
| 138 | int attrs; |
| 139 | { |
| 140 | DIR *d; |
| 141 | int directory_nbytes; |
| 142 | Lisp_Object list, dirfilename, encoded_directory; |
| 143 | struct re_pattern_buffer *bufp = NULL; |
| 144 | int needsep = 0; |
| 145 | int count = specpdl_ptr - specpdl; |
| 146 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
| 147 | DIRENTRY *dp; |
| 148 | int retry_p; |
| 149 | |
| 150 | /* Because of file name handlers, these functions might call |
| 151 | Ffuncall, and cause a GC. */ |
| 152 | list = encoded_directory = dirfilename = Qnil; |
| 153 | GCPRO5 (match, directory, list, dirfilename, encoded_directory); |
| 154 | directory = Fexpand_file_name (directory, Qnil); |
| 155 | dirfilename = Fdirectory_file_name (directory); |
| 156 | |
| 157 | if (!NILP (match)) |
| 158 | { |
| 159 | CHECK_STRING (match, 3); |
| 160 | |
| 161 | /* MATCH might be a flawed regular expression. Rather than |
| 162 | catching and signaling our own errors, we just call |
| 163 | compile_pattern to do the work for us. */ |
| 164 | /* Pass 1 for the MULTIBYTE arg |
| 165 | because we do make multibyte strings if the contents warrant. */ |
| 166 | #ifdef VMS |
| 167 | bufp = compile_pattern (match, 0, |
| 168 | buffer_defaults.downcase_table, 0, 1); |
| 169 | #else |
| 170 | bufp = compile_pattern (match, 0, Qnil, 0, 1); |
| 171 | #endif |
| 172 | } |
| 173 | |
| 174 | /* Note: ENCODE_FILE and DECODE_FILE can GC because they can run |
| 175 | run_pre_post_conversion_on_str which calls Lisp directly and |
| 176 | indirectly. */ |
| 177 | dirfilename = ENCODE_FILE (dirfilename); |
| 178 | encoded_directory = ENCODE_FILE (directory); |
| 179 | |
| 180 | /* Now *bufp is the compiled form of MATCH; don't call anything |
| 181 | which might compile a new regexp until we're done with the loop! */ |
| 182 | |
| 183 | /* Do this opendir after anything which might signal an error; if |
| 184 | an error is signaled while the directory stream is open, we |
| 185 | have to make sure it gets closed, and setting up an |
| 186 | unwind_protect to do so would be a pain. */ |
| 187 | retry: |
| 188 | |
| 189 | d = opendir (XSTRING (dirfilename)->data); |
| 190 | if (d == NULL) |
| 191 | report_file_error ("Opening directory", Fcons (directory, Qnil)); |
| 192 | |
| 193 | /* Unfortunately, we can now invoke expand-file-name and |
| 194 | file-attributes on filenames, both of which can throw, so we must |
| 195 | do a proper unwind-protect. */ |
| 196 | record_unwind_protect (directory_files_internal_unwind, |
| 197 | Fcons (make_number (((unsigned long) d) >> 16), |
| 198 | make_number (((unsigned long) d) & 0xffff))); |
| 199 | |
| 200 | directory_nbytes = STRING_BYTES (XSTRING (directory)); |
| 201 | re_match_object = Qt; |
| 202 | |
| 203 | /* Decide whether we need to add a directory separator. */ |
| 204 | #ifndef VMS |
| 205 | if (directory_nbytes == 0 |
| 206 | || !IS_ANY_SEP (XSTRING (directory)->data[directory_nbytes - 1])) |
| 207 | needsep = 1; |
| 208 | #endif /* not VMS */ |
| 209 | |
| 210 | /* Loop reading blocks until EOF or error. */ |
| 211 | while ((dp = readdir (d)) != NULL) |
| 212 | { |
| 213 | if (DIRENTRY_NONEMPTY (dp)) |
| 214 | { |
| 215 | int len; |
| 216 | int wanted = 0; |
| 217 | Lisp_Object name, finalname; |
| 218 | struct gcpro gcpro1, gcpro2; |
| 219 | |
| 220 | len = NAMLEN (dp); |
| 221 | name = finalname = make_unibyte_string (dp->d_name, len); |
| 222 | GCPRO2 (finalname, name); |
| 223 | |
| 224 | /* Note: ENCODE_FILE can GC; it should protect its argument, |
| 225 | though. */ |
| 226 | name = DECODE_FILE (name); |
| 227 | len = STRING_BYTES (XSTRING (name)); |
| 228 | |
| 229 | /* Now that we have unwind_protect in place, we might as well |
| 230 | allow matching to be interrupted. */ |
| 231 | immediate_quit = 1; |
| 232 | QUIT; |
| 233 | |
| 234 | if (NILP (match) |
| 235 | || (0 <= re_search (bufp, XSTRING (name)->data, len, 0, len, 0))) |
| 236 | wanted = 1; |
| 237 | |
| 238 | immediate_quit = 0; |
| 239 | |
| 240 | if (wanted) |
| 241 | { |
| 242 | if (!NILP (full)) |
| 243 | { |
| 244 | Lisp_Object fullname; |
| 245 | int nbytes = len + directory_nbytes + needsep; |
| 246 | int nchars; |
| 247 | |
| 248 | fullname = make_uninit_multibyte_string (nbytes, nbytes); |
| 249 | bcopy (XSTRING (directory)->data, XSTRING (fullname)->data, |
| 250 | directory_nbytes); |
| 251 | |
| 252 | if (needsep) |
| 253 | XSTRING (fullname)->data[directory_nbytes] = DIRECTORY_SEP; |
| 254 | |
| 255 | bcopy (XSTRING (name)->data, |
| 256 | XSTRING (fullname)->data + directory_nbytes + needsep, |
| 257 | len); |
| 258 | |
| 259 | nchars = chars_in_text (XSTRING (fullname)->data, nbytes); |
| 260 | |
| 261 | /* Some bug somewhere. */ |
| 262 | if (nchars > nbytes) |
| 263 | abort (); |
| 264 | |
| 265 | XSTRING (fullname)->size = nchars; |
| 266 | if (nchars == nbytes) |
| 267 | SET_STRING_BYTES (XSTRING (fullname), -1); |
| 268 | |
| 269 | finalname = fullname; |
| 270 | } |
| 271 | else |
| 272 | finalname = name; |
| 273 | |
| 274 | if (attrs) |
| 275 | { |
| 276 | /* Construct an expanded filename for the directory entry. |
| 277 | Use the decoded names for input to Ffile_attributes. */ |
| 278 | Lisp_Object decoded_fullname, fileattrs; |
| 279 | struct gcpro gcpro1, gcpro2; |
| 280 | |
| 281 | decoded_fullname = fileattrs = Qnil; |
| 282 | GCPRO2 (decoded_fullname, fileattrs); |
| 283 | |
| 284 | /* Both Fexpand_file_name and Ffile_attributes can GC. */ |
| 285 | decoded_fullname = Fexpand_file_name (name, directory); |
| 286 | fileattrs = Ffile_attributes (decoded_fullname); |
| 287 | |
| 288 | list = Fcons (Fcons (finalname, fileattrs), list); |
| 289 | UNGCPRO; |
| 290 | } |
| 291 | else |
| 292 | list = Fcons (finalname, list); |
| 293 | } |
| 294 | |
| 295 | UNGCPRO; |
| 296 | } |
| 297 | } |
| 298 | |
| 299 | retry_p = 0; |
| 300 | #ifdef EAGAIN |
| 301 | retry_p |= errno == EAGAIN; |
| 302 | #endif |
| 303 | #ifdef EINTR |
| 304 | retry_p |= errno == EINTR; |
| 305 | #endif |
| 306 | |
| 307 | closedir (d); |
| 308 | |
| 309 | /* Discard the unwind protect. */ |
| 310 | specpdl_ptr = specpdl + count; |
| 311 | |
| 312 | if (retry_p) |
| 313 | goto retry; |
| 314 | |
| 315 | if (NILP (nosort)) |
| 316 | list = Fsort (Fnreverse (list), |
| 317 | attrs ? Qfile_attributes_lessp : Qstring_lessp); |
| 318 | |
| 319 | RETURN_UNGCPRO (list); |
| 320 | } |
| 321 | |
| 322 | |
| 323 | DEFUN ("directory-files", Fdirectory_files, Sdirectory_files, 1, 4, 0, |
| 324 | "Return a list of names of files in DIRECTORY.\n\ |
| 325 | There are three optional arguments:\n\ |
| 326 | If FULL is non-nil, return absolute file names. Otherwise return names\n\ |
| 327 | that are relative to the specified directory.\n\ |
| 328 | If MATCH is non-nil, mention only file names that match the regexp MATCH.\n\ |
| 329 | If NOSORT is non-nil, the list is not sorted--its order is unpredictable.\n\ |
| 330 | NOSORT is useful if you plan to sort the result yourself.") |
| 331 | (directory, full, match, nosort) |
| 332 | Lisp_Object directory, full, match, nosort; |
| 333 | { |
| 334 | Lisp_Object handler; |
| 335 | |
| 336 | /* If the file name has special constructs in it, |
| 337 | call the corresponding file handler. */ |
| 338 | handler = Ffind_file_name_handler (directory, Qdirectory_files); |
| 339 | if (!NILP (handler)) |
| 340 | { |
| 341 | Lisp_Object args[6]; |
| 342 | |
| 343 | args[0] = handler; |
| 344 | args[1] = Qdirectory_files; |
| 345 | args[2] = directory; |
| 346 | args[3] = full; |
| 347 | args[4] = match; |
| 348 | args[5] = nosort; |
| 349 | return Ffuncall (6, args); |
| 350 | } |
| 351 | |
| 352 | return directory_files_internal (directory, full, match, nosort, 0); |
| 353 | } |
| 354 | |
| 355 | DEFUN ("directory-files-and-attributes", Fdirectory_files_and_attributes, Sdirectory_files_and_attributes, 1, 4, 0, |
| 356 | "Return a list of names of files and their attributes in DIRECTORY.\n\ |
| 357 | There are three optional arguments:\n\ |
| 358 | If FULL is non-nil, return absolute file names. Otherwise return names\n\ |
| 359 | that are relative to the specified directory.\n\ |
| 360 | If MATCH is non-nil, mention only file names that match the regexp MATCH.\n\ |
| 361 | If NOSORT is non-nil, the list is not sorted--its order is unpredictable.\n\ |
| 362 | NOSORT is useful if you plan to sort the result yourself.") |
| 363 | (directory, full, match, nosort) |
| 364 | Lisp_Object directory, full, match, nosort; |
| 365 | { |
| 366 | Lisp_Object handler; |
| 367 | |
| 368 | /* If the file name has special constructs in it, |
| 369 | call the corresponding file handler. */ |
| 370 | handler = Ffind_file_name_handler (directory, Qdirectory_files_and_attributes); |
| 371 | if (!NILP (handler)) |
| 372 | { |
| 373 | Lisp_Object args[6]; |
| 374 | |
| 375 | args[0] = handler; |
| 376 | args[1] = Qdirectory_files_and_attributes; |
| 377 | args[2] = directory; |
| 378 | args[3] = full; |
| 379 | args[4] = match; |
| 380 | args[5] = nosort; |
| 381 | return Ffuncall (6, args); |
| 382 | } |
| 383 | |
| 384 | return directory_files_internal (directory, full, match, nosort, 1); |
| 385 | } |
| 386 | |
| 387 | \f |
| 388 | Lisp_Object file_name_completion (); |
| 389 | |
| 390 | DEFUN ("file-name-completion", Ffile_name_completion, Sfile_name_completion, |
| 391 | 2, 2, 0, |
| 392 | "Complete file name FILE in directory DIRECTORY.\n\ |
| 393 | Returns the longest string\n\ |
| 394 | common to all file names in DIRECTORY that start with FILE.\n\ |
| 395 | If there is only one and FILE matches it exactly, returns t.\n\ |
| 396 | Returns nil if DIR contains no name starting with FILE.") |
| 397 | (file, directory) |
| 398 | Lisp_Object file, directory; |
| 399 | { |
| 400 | Lisp_Object handler; |
| 401 | |
| 402 | /* If the directory name has special constructs in it, |
| 403 | call the corresponding file handler. */ |
| 404 | handler = Ffind_file_name_handler (directory, Qfile_name_completion); |
| 405 | if (!NILP (handler)) |
| 406 | return call3 (handler, Qfile_name_completion, file, directory); |
| 407 | |
| 408 | /* If the file name has special constructs in it, |
| 409 | call the corresponding file handler. */ |
| 410 | handler = Ffind_file_name_handler (file, Qfile_name_completion); |
| 411 | if (!NILP (handler)) |
| 412 | return call3 (handler, Qfile_name_completion, file, directory); |
| 413 | |
| 414 | return file_name_completion (file, directory, 0, 0); |
| 415 | } |
| 416 | |
| 417 | DEFUN ("file-name-all-completions", Ffile_name_all_completions, |
| 418 | Sfile_name_all_completions, 2, 2, 0, |
| 419 | "Return a list of all completions of file name FILE in directory DIRECTORY.\n\ |
| 420 | These are all file names in directory DIRECTORY which begin with FILE.") |
| 421 | (file, directory) |
| 422 | Lisp_Object file, directory; |
| 423 | { |
| 424 | Lisp_Object handler; |
| 425 | |
| 426 | /* If the directory name has special constructs in it, |
| 427 | call the corresponding file handler. */ |
| 428 | handler = Ffind_file_name_handler (directory, Qfile_name_all_completions); |
| 429 | if (!NILP (handler)) |
| 430 | return call3 (handler, Qfile_name_all_completions, file, directory); |
| 431 | |
| 432 | /* If the file name has special constructs in it, |
| 433 | call the corresponding file handler. */ |
| 434 | handler = Ffind_file_name_handler (file, Qfile_name_all_completions); |
| 435 | if (!NILP (handler)) |
| 436 | return call3 (handler, Qfile_name_all_completions, file, directory); |
| 437 | |
| 438 | return file_name_completion (file, directory, 1, 0); |
| 439 | } |
| 440 | |
| 441 | static int file_name_completion_stat (); |
| 442 | |
| 443 | Lisp_Object |
| 444 | file_name_completion (file, dirname, all_flag, ver_flag) |
| 445 | Lisp_Object file, dirname; |
| 446 | int all_flag, ver_flag; |
| 447 | { |
| 448 | DIR *d; |
| 449 | int bestmatchsize = 0, skip; |
| 450 | register int compare, matchsize; |
| 451 | unsigned char *p1, *p2; |
| 452 | int matchcount = 0; |
| 453 | Lisp_Object bestmatch, tem, elt, name; |
| 454 | Lisp_Object encoded_file; |
| 455 | Lisp_Object encoded_dir; |
| 456 | struct stat st; |
| 457 | int directoryp; |
| 458 | int passcount; |
| 459 | int count = specpdl_ptr - specpdl; |
| 460 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
| 461 | |
| 462 | elt = Qnil; |
| 463 | |
| 464 | #ifdef VMS |
| 465 | extern DIRENTRY * readdirver (); |
| 466 | |
| 467 | DIRENTRY *((* readfunc) ()); |
| 468 | |
| 469 | /* Filename completion on VMS ignores case, since VMS filesys does. */ |
| 470 | specbind (Qcompletion_ignore_case, Qt); |
| 471 | |
| 472 | readfunc = readdir; |
| 473 | if (ver_flag) |
| 474 | readfunc = readdirver; |
| 475 | file = Fupcase (file); |
| 476 | #else /* not VMS */ |
| 477 | CHECK_STRING (file, 0); |
| 478 | #endif /* not VMS */ |
| 479 | |
| 480 | #ifdef FILE_SYSTEM_CASE |
| 481 | file = FILE_SYSTEM_CASE (file); |
| 482 | #endif |
| 483 | bestmatch = Qnil; |
| 484 | encoded_file = encoded_dir = Qnil; |
| 485 | GCPRO5 (file, dirname, bestmatch, encoded_file, encoded_dir); |
| 486 | dirname = Fexpand_file_name (dirname, Qnil); |
| 487 | |
| 488 | /* Do completion on the encoded file name |
| 489 | because the other names in the directory are (we presume) |
| 490 | encoded likewise. We decode the completed string at the end. */ |
| 491 | encoded_file = ENCODE_FILE (file); |
| 492 | |
| 493 | encoded_dir = ENCODE_FILE (dirname); |
| 494 | |
| 495 | /* With passcount = 0, ignore files that end in an ignored extension. |
| 496 | If nothing found then try again with passcount = 1, don't ignore them. |
| 497 | If looking for all completions, start with passcount = 1, |
| 498 | so always take even the ignored ones. |
| 499 | |
| 500 | ** It would not actually be helpful to the user to ignore any possible |
| 501 | completions when making a list of them.** */ |
| 502 | |
| 503 | for (passcount = !!all_flag; NILP (bestmatch) && passcount < 2; passcount++) |
| 504 | { |
| 505 | d = opendir (XSTRING (Fdirectory_file_name (encoded_dir))->data); |
| 506 | if (!d) |
| 507 | report_file_error ("Opening directory", Fcons (dirname, Qnil)); |
| 508 | |
| 509 | /* Loop reading blocks */ |
| 510 | /* (att3b compiler bug requires do a null comparison this way) */ |
| 511 | while (1) |
| 512 | { |
| 513 | DIRENTRY *dp; |
| 514 | int len; |
| 515 | |
| 516 | #ifdef VMS |
| 517 | dp = (*readfunc) (d); |
| 518 | #else |
| 519 | dp = readdir (d); |
| 520 | #endif |
| 521 | if (!dp) break; |
| 522 | |
| 523 | len = NAMLEN (dp); |
| 524 | |
| 525 | if (!NILP (Vquit_flag) && NILP (Vinhibit_quit)) |
| 526 | goto quit; |
| 527 | if (! DIRENTRY_NONEMPTY (dp) |
| 528 | || len < XSTRING (encoded_file)->size |
| 529 | || 0 <= scmp (dp->d_name, XSTRING (encoded_file)->data, |
| 530 | XSTRING (encoded_file)->size)) |
| 531 | continue; |
| 532 | |
| 533 | if (file_name_completion_stat (encoded_dir, dp, &st) < 0) |
| 534 | continue; |
| 535 | |
| 536 | directoryp = ((st.st_mode & S_IFMT) == S_IFDIR); |
| 537 | tem = Qnil; |
| 538 | if (directoryp) |
| 539 | { |
| 540 | #ifndef TRIVIAL_DIRECTORY_ENTRY |
| 541 | #define TRIVIAL_DIRECTORY_ENTRY(n) (!strcmp (n, ".") || !strcmp (n, "..")) |
| 542 | #endif |
| 543 | /* "." and ".." are never interesting as completions, but are |
| 544 | actually in the way in a directory contains only one file. */ |
| 545 | if (!passcount && TRIVIAL_DIRECTORY_ENTRY (dp->d_name)) |
| 546 | continue; |
| 547 | } |
| 548 | else |
| 549 | { |
| 550 | /* Compare extensions-to-be-ignored against end of this file name */ |
| 551 | /* if name is not an exact match against specified string */ |
| 552 | if (!passcount && len > XSTRING (encoded_file)->size) |
| 553 | /* and exit this for loop if a match is found */ |
| 554 | for (tem = Vcompletion_ignored_extensions; |
| 555 | CONSP (tem); tem = XCDR (tem)) |
| 556 | { |
| 557 | elt = XCAR (tem); |
| 558 | if (!STRINGP (elt)) continue; |
| 559 | skip = len - XSTRING (elt)->size; |
| 560 | if (skip < 0) continue; |
| 561 | |
| 562 | if (0 <= scmp (dp->d_name + skip, |
| 563 | XSTRING (elt)->data, |
| 564 | XSTRING (elt)->size)) |
| 565 | continue; |
| 566 | break; |
| 567 | } |
| 568 | } |
| 569 | |
| 570 | /* If an ignored-extensions match was found, |
| 571 | don't process this name as a completion. */ |
| 572 | if (!passcount && CONSP (tem)) |
| 573 | continue; |
| 574 | |
| 575 | if (!passcount) |
| 576 | { |
| 577 | Lisp_Object regexps; |
| 578 | Lisp_Object zero; |
| 579 | XSETFASTINT (zero, 0); |
| 580 | |
| 581 | /* Ignore this element if it fails to match all the regexps. */ |
| 582 | for (regexps = Vcompletion_regexp_list; CONSP (regexps); |
| 583 | regexps = XCDR (regexps)) |
| 584 | { |
| 585 | tem = Fstring_match (XCAR (regexps), elt, zero); |
| 586 | if (NILP (tem)) |
| 587 | break; |
| 588 | } |
| 589 | if (CONSP (regexps)) |
| 590 | continue; |
| 591 | } |
| 592 | |
| 593 | /* Update computation of how much all possible completions match */ |
| 594 | |
| 595 | matchcount++; |
| 596 | |
| 597 | if (all_flag || NILP (bestmatch)) |
| 598 | { |
| 599 | /* This is a possible completion */ |
| 600 | if (directoryp) |
| 601 | { |
| 602 | /* This completion is a directory; make it end with '/' */ |
| 603 | name = Ffile_name_as_directory (make_string (dp->d_name, len)); |
| 604 | } |
| 605 | else |
| 606 | name = make_string (dp->d_name, len); |
| 607 | if (all_flag) |
| 608 | { |
| 609 | name = DECODE_FILE (name); |
| 610 | bestmatch = Fcons (name, bestmatch); |
| 611 | } |
| 612 | else |
| 613 | { |
| 614 | bestmatch = name; |
| 615 | bestmatchsize = XSTRING (name)->size; |
| 616 | } |
| 617 | } |
| 618 | else |
| 619 | { |
| 620 | compare = min (bestmatchsize, len); |
| 621 | p1 = XSTRING (bestmatch)->data; |
| 622 | p2 = (unsigned char *) dp->d_name; |
| 623 | matchsize = scmp(p1, p2, compare); |
| 624 | if (matchsize < 0) |
| 625 | matchsize = compare; |
| 626 | if (completion_ignore_case) |
| 627 | { |
| 628 | /* If this is an exact match except for case, |
| 629 | use it as the best match rather than one that is not |
| 630 | an exact match. This way, we get the case pattern |
| 631 | of the actual match. */ |
| 632 | /* This tests that the current file is an exact match |
| 633 | but BESTMATCH is not (it is too long). */ |
| 634 | if ((matchsize == len |
| 635 | && matchsize + !!directoryp |
| 636 | < XSTRING (bestmatch)->size) |
| 637 | || |
| 638 | /* If there is no exact match ignoring case, |
| 639 | prefer a match that does not change the case |
| 640 | of the input. */ |
| 641 | /* If there is more than one exact match aside from |
| 642 | case, and one of them is exact including case, |
| 643 | prefer that one. */ |
| 644 | /* This == checks that, of current file and BESTMATCH, |
| 645 | either both or neither are exact. */ |
| 646 | (((matchsize == len) |
| 647 | == |
| 648 | (matchsize + !!directoryp |
| 649 | == XSTRING (bestmatch)->size)) |
| 650 | && !bcmp (p2, XSTRING (encoded_file)->data, XSTRING (encoded_file)->size) |
| 651 | && bcmp (p1, XSTRING (encoded_file)->data, XSTRING (encoded_file)->size))) |
| 652 | { |
| 653 | bestmatch = make_string (dp->d_name, len); |
| 654 | if (directoryp) |
| 655 | bestmatch = Ffile_name_as_directory (bestmatch); |
| 656 | } |
| 657 | } |
| 658 | |
| 659 | /* If this dirname all matches, see if implicit following |
| 660 | slash does too. */ |
| 661 | if (directoryp |
| 662 | && compare == matchsize |
| 663 | && bestmatchsize > matchsize |
| 664 | && IS_ANY_SEP (p1[matchsize])) |
| 665 | matchsize++; |
| 666 | bestmatchsize = matchsize; |
| 667 | } |
| 668 | } |
| 669 | closedir (d); |
| 670 | } |
| 671 | |
| 672 | UNGCPRO; |
| 673 | bestmatch = unbind_to (count, bestmatch); |
| 674 | |
| 675 | if (all_flag || NILP (bestmatch)) |
| 676 | { |
| 677 | if (STRINGP (bestmatch)) |
| 678 | bestmatch = DECODE_FILE (bestmatch); |
| 679 | return bestmatch; |
| 680 | } |
| 681 | if (matchcount == 1 && bestmatchsize == XSTRING (file)->size) |
| 682 | return Qt; |
| 683 | bestmatch = Fsubstring (bestmatch, make_number (0), |
| 684 | make_number (bestmatchsize)); |
| 685 | /* Now that we got the right initial segment of BESTMATCH, |
| 686 | decode it from the coding system in use. */ |
| 687 | bestmatch = DECODE_FILE (bestmatch); |
| 688 | return bestmatch; |
| 689 | |
| 690 | quit: |
| 691 | if (d) closedir (d); |
| 692 | Vquit_flag = Qnil; |
| 693 | return Fsignal (Qquit, Qnil); |
| 694 | } |
| 695 | |
| 696 | static int |
| 697 | file_name_completion_stat (dirname, dp, st_addr) |
| 698 | Lisp_Object dirname; |
| 699 | DIRENTRY *dp; |
| 700 | struct stat *st_addr; |
| 701 | { |
| 702 | int len = NAMLEN (dp); |
| 703 | int pos = XSTRING (dirname)->size; |
| 704 | int value; |
| 705 | char *fullname = (char *) alloca (len + pos + 2); |
| 706 | |
| 707 | #ifdef MSDOS |
| 708 | #if __DJGPP__ > 1 |
| 709 | /* Some fields of struct stat are *very* expensive to compute on MS-DOS, |
| 710 | but aren't required here. Avoid computing the following fields: |
| 711 | st_inode, st_size and st_nlink for directories, and the execute bits |
| 712 | in st_mode for non-directory files with non-standard extensions. */ |
| 713 | |
| 714 | unsigned short save_djstat_flags = _djstat_flags; |
| 715 | |
| 716 | _djstat_flags = _STAT_INODE | _STAT_EXEC_MAGIC | _STAT_DIRSIZE; |
| 717 | #endif /* __DJGPP__ > 1 */ |
| 718 | #endif /* MSDOS */ |
| 719 | |
| 720 | bcopy (XSTRING (dirname)->data, fullname, pos); |
| 721 | #ifndef VMS |
| 722 | if (!IS_DIRECTORY_SEP (fullname[pos - 1])) |
| 723 | fullname[pos++] = DIRECTORY_SEP; |
| 724 | #endif |
| 725 | |
| 726 | bcopy (dp->d_name, fullname + pos, len); |
| 727 | fullname[pos + len] = 0; |
| 728 | |
| 729 | #ifdef S_IFLNK |
| 730 | /* We want to return success if a link points to a nonexistent file, |
| 731 | but we want to return the status for what the link points to, |
| 732 | in case it is a directory. */ |
| 733 | value = lstat (fullname, st_addr); |
| 734 | stat (fullname, st_addr); |
| 735 | return value; |
| 736 | #else |
| 737 | value = stat (fullname, st_addr); |
| 738 | #ifdef MSDOS |
| 739 | #if __DJGPP__ > 1 |
| 740 | _djstat_flags = save_djstat_flags; |
| 741 | #endif /* __DJGPP__ > 1 */ |
| 742 | #endif /* MSDOS */ |
| 743 | return value; |
| 744 | #endif /* S_IFLNK */ |
| 745 | } |
| 746 | \f |
| 747 | #ifdef VMS |
| 748 | |
| 749 | DEFUN ("file-name-all-versions", Ffile_name_all_versions, |
| 750 | Sfile_name_all_versions, 2, 2, 0, |
| 751 | "Return a list of all versions of file name FILE in directory DIRECTORY.") |
| 752 | (file, directory) |
| 753 | Lisp_Object file, directory; |
| 754 | { |
| 755 | return file_name_completion (file, directory, 1, 1); |
| 756 | } |
| 757 | |
| 758 | DEFUN ("file-version-limit", Ffile_version_limit, Sfile_version_limit, 1, 1, 0, |
| 759 | "Return the maximum number of versions allowed for FILE.\n\ |
| 760 | Returns nil if the file cannot be opened or if there is no version limit.") |
| 761 | (filename) |
| 762 | Lisp_Object filename; |
| 763 | { |
| 764 | Lisp_Object retval; |
| 765 | struct FAB fab; |
| 766 | struct RAB rab; |
| 767 | struct XABFHC xabfhc; |
| 768 | int status; |
| 769 | |
| 770 | filename = Fexpand_file_name (filename, Qnil); |
| 771 | fab = cc$rms_fab; |
| 772 | xabfhc = cc$rms_xabfhc; |
| 773 | fab.fab$l_fna = XSTRING (filename)->data; |
| 774 | fab.fab$b_fns = strlen (fab.fab$l_fna); |
| 775 | fab.fab$l_xab = (char *) &xabfhc; |
| 776 | status = sys$open (&fab, 0, 0); |
| 777 | if (status != RMS$_NORMAL) /* Probably non-existent file */ |
| 778 | return Qnil; |
| 779 | sys$close (&fab, 0, 0); |
| 780 | if (xabfhc.xab$w_verlimit == 32767) |
| 781 | return Qnil; /* No version limit */ |
| 782 | else |
| 783 | return make_number (xabfhc.xab$w_verlimit); |
| 784 | } |
| 785 | |
| 786 | #endif /* VMS */ |
| 787 | \f |
| 788 | Lisp_Object |
| 789 | make_time (time) |
| 790 | time_t time; |
| 791 | { |
| 792 | return Fcons (make_number (time >> 16), |
| 793 | Fcons (make_number (time & 0177777), Qnil)); |
| 794 | } |
| 795 | |
| 796 | DEFUN ("file-attributes", Ffile_attributes, Sfile_attributes, 1, 1, 0, |
| 797 | "Return a list of attributes of file FILENAME.\n\ |
| 798 | Value is nil if specified file cannot be opened.\n\ |
| 799 | Otherwise, list elements are:\n\ |
| 800 | 0. t for directory, string (name linked to) for symbolic link, or nil.\n\ |
| 801 | 1. Number of links to file.\n\ |
| 802 | 2. File uid.\n\ |
| 803 | 3. File gid.\n\ |
| 804 | 4. Last access time, as a list of two integers.\n\ |
| 805 | First integer has high-order 16 bits of time, second has low 16 bits.\n\ |
| 806 | 5. Last modification time, likewise.\n\ |
| 807 | 6. Last status change time, likewise.\n\ |
| 808 | 7. Size in bytes.\n\ |
| 809 | This is a floating point number if the size is too large for an integer.\n\ |
| 810 | 8. File modes, as a string of ten letters or dashes as in ls -l.\n\ |
| 811 | 9. t iff file's gid would change if file were deleted and recreated.\n\ |
| 812 | 10. inode number. If inode number is larger than the Emacs integer,\n\ |
| 813 | this is a cons cell containing two integers: first the high part,\n\ |
| 814 | then the low 16 bits.\n\ |
| 815 | 11. Device number.\n\ |
| 816 | \n\ |
| 817 | If file does not exist, returns nil.") |
| 818 | (filename) |
| 819 | Lisp_Object filename; |
| 820 | { |
| 821 | Lisp_Object values[12]; |
| 822 | Lisp_Object encoded; |
| 823 | struct stat s; |
| 824 | #if defined (BSD4_2) || defined (BSD4_3) |
| 825 | Lisp_Object dirname; |
| 826 | struct stat sdir; |
| 827 | #endif |
| 828 | char modes[10]; |
| 829 | Lisp_Object handler; |
| 830 | |
| 831 | filename = Fexpand_file_name (filename, Qnil); |
| 832 | |
| 833 | /* If the file name has special constructs in it, |
| 834 | call the corresponding file handler. */ |
| 835 | handler = Ffind_file_name_handler (filename, Qfile_attributes); |
| 836 | if (!NILP (handler)) |
| 837 | return call2 (handler, Qfile_attributes, filename); |
| 838 | |
| 839 | encoded = ENCODE_FILE (filename); |
| 840 | |
| 841 | if (lstat (XSTRING (encoded)->data, &s) < 0) |
| 842 | return Qnil; |
| 843 | |
| 844 | switch (s.st_mode & S_IFMT) |
| 845 | { |
| 846 | default: |
| 847 | values[0] = Qnil; break; |
| 848 | case S_IFDIR: |
| 849 | values[0] = Qt; break; |
| 850 | #ifdef S_IFLNK |
| 851 | case S_IFLNK: |
| 852 | values[0] = Ffile_symlink_p (filename); break; |
| 853 | #endif |
| 854 | } |
| 855 | values[1] = make_number (s.st_nlink); |
| 856 | values[2] = make_number (s.st_uid); |
| 857 | values[3] = make_number (s.st_gid); |
| 858 | values[4] = make_time (s.st_atime); |
| 859 | values[5] = make_time (s.st_mtime); |
| 860 | values[6] = make_time (s.st_ctime); |
| 861 | values[7] = make_number (s.st_size); |
| 862 | /* If the size is out of range for an integer, return a float. */ |
| 863 | if (XINT (values[7]) != s.st_size) |
| 864 | values[7] = make_float ((double)s.st_size); |
| 865 | filemodestring (&s, modes); |
| 866 | values[8] = make_string (modes, 10); |
| 867 | #if defined (BSD4_2) || defined (BSD4_3) /* file gid will be dir gid */ |
| 868 | dirname = Ffile_name_directory (filename); |
| 869 | if (! NILP (dirname)) |
| 870 | encoded = ENCODE_FILE (dirname); |
| 871 | if (! NILP (dirname) && stat (XSTRING (encoded)->data, &sdir) == 0) |
| 872 | values[9] = (sdir.st_gid != s.st_gid) ? Qt : Qnil; |
| 873 | else /* if we can't tell, assume worst */ |
| 874 | values[9] = Qt; |
| 875 | #else /* file gid will be egid */ |
| 876 | values[9] = (s.st_gid != getegid ()) ? Qt : Qnil; |
| 877 | #endif /* BSD4_2 (or BSD4_3) */ |
| 878 | /* Cast -1 to avoid warning if int is not as wide as VALBITS. */ |
| 879 | if (s.st_ino & (((EMACS_INT) (-1)) << VALBITS)) |
| 880 | /* To allow inode numbers larger than VALBITS, separate the bottom |
| 881 | 16 bits. */ |
| 882 | values[10] = Fcons (make_number (s.st_ino >> 16), |
| 883 | make_number (s.st_ino & 0xffff)); |
| 884 | else |
| 885 | /* But keep the most common cases as integers. */ |
| 886 | values[10] = make_number (s.st_ino); |
| 887 | |
| 888 | /* Likewise for device. */ |
| 889 | if (s.st_dev & (((EMACS_INT) (-1)) << VALBITS)) |
| 890 | values[11] = Fcons (make_number (s.st_dev >> 16), |
| 891 | make_number (s.st_dev & 0xffff)); |
| 892 | else |
| 893 | values[11] = make_number (s.st_dev); |
| 894 | |
| 895 | return Flist (sizeof(values) / sizeof(values[0]), values); |
| 896 | } |
| 897 | |
| 898 | DEFUN ("file-attributes-lessp", Ffile_attributes_lessp, Sfile_attributes_lessp, 2, 2, 0, |
| 899 | "Return t if first arg file attributes list is less than second.\n\ |
| 900 | Comparison is in lexicographic order and case is significant.") |
| 901 | (f1, f2) |
| 902 | Lisp_Object f1, f2; |
| 903 | { |
| 904 | return Fstring_lessp (Fcar (f1), Fcar (f2)); |
| 905 | } |
| 906 | \f |
| 907 | void |
| 908 | syms_of_dired () |
| 909 | { |
| 910 | Qdirectory_files = intern ("directory-files"); |
| 911 | Qdirectory_files_and_attributes = intern ("directory-files-and-attributes"); |
| 912 | Qfile_name_completion = intern ("file-name-completion"); |
| 913 | Qfile_name_all_completions = intern ("file-name-all-completions"); |
| 914 | Qfile_attributes = intern ("file-attributes"); |
| 915 | Qfile_attributes_lessp = intern ("file-attributes-lessp"); |
| 916 | |
| 917 | staticpro (&Qdirectory_files); |
| 918 | staticpro (&Qdirectory_files_and_attributes); |
| 919 | staticpro (&Qfile_name_completion); |
| 920 | staticpro (&Qfile_name_all_completions); |
| 921 | staticpro (&Qfile_attributes); |
| 922 | staticpro (&Qfile_attributes_lessp); |
| 923 | |
| 924 | defsubr (&Sdirectory_files); |
| 925 | defsubr (&Sdirectory_files_and_attributes); |
| 926 | defsubr (&Sfile_name_completion); |
| 927 | #ifdef VMS |
| 928 | defsubr (&Sfile_name_all_versions); |
| 929 | defsubr (&Sfile_version_limit); |
| 930 | #endif /* VMS */ |
| 931 | defsubr (&Sfile_name_all_completions); |
| 932 | defsubr (&Sfile_attributes); |
| 933 | defsubr (&Sfile_attributes_lessp); |
| 934 | |
| 935 | #ifdef VMS |
| 936 | Qcompletion_ignore_case = intern ("completion-ignore-case"); |
| 937 | staticpro (&Qcompletion_ignore_case); |
| 938 | #endif /* VMS */ |
| 939 | |
| 940 | DEFVAR_LISP ("completion-ignored-extensions", &Vcompletion_ignored_extensions, |
| 941 | "*Completion ignores filenames ending in any string in this list.\n\ |
| 942 | This variable does not affect lists of possible completions,\n\ |
| 943 | but does affect the commands that actually do completions."); |
| 944 | Vcompletion_ignored_extensions = Qnil; |
| 945 | } |