dired.c 27.4 KB
Newer Older
Richard M. Stallman's avatar
Richard M. Stallman committed
1
/* Lisp functions for making directory listings.
2
   Copyright (C) 1985, 1986, 1993, 1994, 1999 Free Software Foundation, Inc.
Richard M. Stallman's avatar
Richard M. Stallman committed
3 4 5 6 7

This file is part of GNU Emacs.

GNU Emacs is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
Karl Heuer's avatar
Karl Heuer committed
8
the Free Software Foundation; either version 2, or (at your option)
Richard M. Stallman's avatar
Richard M. Stallman committed
9 10 11 12 13 14 15 16 17
any later version.

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING.  If not, write to
18 19
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */
Richard M. Stallman's avatar
Richard M. Stallman committed
20 21


22 23
#include <config.h>

Richard M. Stallman's avatar
Richard M. Stallman committed
24 25 26 27
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>

28 29
#include "systime.h"

30 31 32 33 34 35
#ifdef VMS
#include <string.h>
#include <rms.h>
#include <rmsdef.h>
#endif

Andreas Schwab's avatar
Andreas Schwab committed
36 37 38 39
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

40 41 42 43 44 45 46 47 48 49 50 51
/* The d_nameln member of a struct dirent includes the '\0' character
   on some systems, but not on others.  What's worse, you can't tell
   at compile-time which one it will be, since it really depends on
   the sort of system providing the filesystem you're reading from,
   not the system you are running on.  Paul Eggert
   <eggert@bi.twinsun.com> says this occurs when Emacs is running on a
   SunOS 4.1.2 host, reading a directory that is remote-mounted from a
   Solaris 2.1 host and is in a native Solaris 2.1 filesystem.

   Since applying strlen to the name always works, we'll just do that.  */
#define NAMLEN(p) strlen (p->d_name)

Richard M. Stallman's avatar
Richard M. Stallman committed
52 53 54 55 56
#ifdef SYSV_SYSTEM_DIR

#include <dirent.h>
#define DIRENTRY struct dirent

57
#else /* not SYSV_SYSTEM_DIR */
Richard M. Stallman's avatar
Richard M. Stallman committed
58 59 60 61

#ifdef NONSYSTEM_DIR_LIBRARY
#include "ndir.h"
#else /* not NONSYSTEM_DIR_LIBRARY */
62 63 64
#ifdef MSDOS
#include <dirent.h>
#else
Richard M. Stallman's avatar
Richard M. Stallman committed
65
#include <sys/dir.h>
66
#endif
Richard M. Stallman's avatar
Richard M. Stallman committed
67 68
#endif /* not NONSYSTEM_DIR_LIBRARY */

69 70
#include <sys/stat.h>

71
#ifndef MSDOS
Richard M. Stallman's avatar
Richard M. Stallman committed
72 73 74 75 76
#define DIRENTRY struct direct

extern DIR *opendir ();
extern struct direct *readdir ();

77 78 79 80 81 82 83
#endif /* not MSDOS */
#endif /* not SYSV_SYSTEM_DIR */

#ifdef MSDOS
#define DIRENTRY_NONEMPTY(p) ((p)->d_name[0] != 0)
#else
#define DIRENTRY_NONEMPTY(p) ((p)->d_ino)
Richard M. Stallman's avatar
Richard M. Stallman committed
84 85 86 87 88
#endif

#include "lisp.h"
#include "buffer.h"
#include "commands.h"
89 90
#include "charset.h"
#include "coding.h"
Richard M. Stallman's avatar
Richard M. Stallman committed
91 92
#include "regex.h"

93 94
/* Returns a search buffer, with a fastmap allocated and ready to go.  */
extern struct re_pattern_buffer *compile_pattern ();
95

96 97 98
/* From filemode.c.  Can't go in Lisp.h because of `stat'.  */
extern void filemodestring P_ ((struct stat *, char *));

Richard M. Stallman's avatar
Richard M. Stallman committed
99 100 101 102 103 104 105 106 107
#define min(a, b) ((a) < (b) ? (a) : (b))

/* if system does not have symbolic links, it does not have lstat.
   In that case, use ordinary stat instead.  */

#ifndef S_IFLNK
#define lstat stat
#endif

108
extern int completion_ignore_case;
109
extern Lisp_Object Vcompletion_regexp_list;
110
extern Lisp_Object Vfile_name_coding_system, Vdefault_file_name_coding_system;
111

Richard M. Stallman's avatar
Richard M. Stallman committed
112 113
Lisp_Object Vcompletion_ignored_extensions;
Lisp_Object Qcompletion_ignore_case;
114
Lisp_Object Qdirectory_files;
115
Lisp_Object Qdirectory_files_and_attributes;
116 117
Lisp_Object Qfile_name_completion;
Lisp_Object Qfile_name_all_completions;
Jim Blandy's avatar
Jim Blandy committed
118
Lisp_Object Qfile_attributes;
119
Lisp_Object Qfile_attributes_lessp;
Richard M. Stallman's avatar
Richard M. Stallman committed
120

121 122 123 124 125 126 127 128 129 130

Lisp_Object
directory_files_internal_unwind (dh)
     Lisp_Object dh;
{
  DIR *d = (DIR *) ((XINT (XCAR (dh)) << 16) + XINT (XCDR (dh)));
  closedir (d);
  return Qnil;
}

131 132 133 134 135
/* Function shared by Fdirectory_files and Fdirectory_files_and_attributes.  
   When ATTRS is zero, return a list of directory filenames; when
   non-zero, return a list of directory filenames and their attributes.  */
Lisp_Object
directory_files_internal (directory, full, match, nosort, attrs)
136
     Lisp_Object directory, full, match, nosort;
137
     int attrs;
Richard M. Stallman's avatar
Richard M. Stallman committed
138 139
{
  DIR *d;
140
  int dirnamelen;
141
  Lisp_Object list, name, dirfilename;
142
  Lisp_Object encoded_directory;
143
  Lisp_Object handler;
144
  struct re_pattern_buffer *bufp = NULL;
145
  int needsep = 0;
146
  int count = specpdl_ptr - specpdl;
147
  struct gcpro gcpro1, gcpro2;
148

149
  /* Because of file name handlers, these functions might call
150
     Ffuncall, and cause a GC.  */
151 152 153 154 155 156
  GCPRO1 (match);
  directory = Fexpand_file_name (directory, Qnil);
  UNGCPRO;
  GCPRO2 (match, directory);
  dirfilename = Fdirectory_file_name (directory);
  UNGCPRO;
157

Jim Blandy's avatar
Jim Blandy committed
158
  if (!NILP (match))
Richard M. Stallman's avatar
Richard M. Stallman committed
159 160
    {
      CHECK_STRING (match, 3);
Jim Blandy's avatar
Jim Blandy committed
161 162

      /* MATCH might be a flawed regular expression.  Rather than
Karl Heuer's avatar
Karl Heuer committed
163
	 catching and signaling our own errors, we just call
Jim Blandy's avatar
Jim Blandy committed
164
	 compile_pattern to do the work for us.  */
165 166
      /* Pass 1 for the MULTIBYTE arg
	 because we do make multibyte strings if the contents warrant.  */
Richard M. Stallman's avatar
Richard M. Stallman committed
167
#ifdef VMS
168
      bufp = compile_pattern (match, 0,
169
			      buffer_defaults.downcase_table, 0, 1);
Richard M. Stallman's avatar
Richard M. Stallman committed
170
#else
171
      bufp = compile_pattern (match, 0, Qnil, 0, 1);
Richard M. Stallman's avatar
Richard M. Stallman committed
172 173 174
#endif
    }

175 176 177 178
  dirfilename = ENCODE_FILE (dirfilename);

  encoded_directory = ENCODE_FILE (directory);

179
  /* Now *bufp is the compiled form of MATCH; don't call anything
180 181 182
     which might compile a new regexp until we're done with the loop!  */

  /* Do this opendir after anything which might signal an error; if
Karl Heuer's avatar
Karl Heuer committed
183
     an error is signaled while the directory stream is open, we
184 185 186 187
     have to make sure it gets closed, and setting up an
     unwind_protect to do so would be a pain.  */
  d = opendir (XSTRING (dirfilename)->data);
  if (! d)
188
    report_file_error ("Opening directory", Fcons (directory, Qnil));
Richard M. Stallman's avatar
Richard M. Stallman committed
189

190 191 192 193 194 195 196
  /* Unfortunately, we can now invoke expand-file-name and
     file-attributes on filenames, both of which can throw, so we must
     do a proper unwind-protect.  */
  record_unwind_protect (directory_files_internal_unwind,
			 Fcons (make_number (((unsigned long) d) >> 16),
				make_number (((unsigned long) d) & 0xffff)));

Richard M. Stallman's avatar
Richard M. Stallman committed
197
  list = Qnil;
198
  dirnamelen = STRING_BYTES (XSTRING (directory));
199
  re_match_object = Qt;
Richard M. Stallman's avatar
Richard M. Stallman committed
200

201 202 203
  /* Decide whether we need to add a directory separator.  */
#ifndef VMS
  if (dirnamelen == 0
204
      || !IS_ANY_SEP (XSTRING (directory)->data[dirnamelen - 1]))
205
    needsep = 1;
206
#endif /* not VMS */
207 208 209

  GCPRO2 (encoded_directory, list);

Richard M. Stallman's avatar
Richard M. Stallman committed
210 211 212 213 214 215
  /* Loop reading blocks */
  while (1)
    {
      DIRENTRY *dp = readdir (d);

      if (!dp) break;
216
      if (DIRENTRY_NONEMPTY (dp))
Richard M. Stallman's avatar
Richard M. Stallman committed
217
	{
218
	  int len;
219
	  int wanted = 0;
220 221 222 223 224

	  len = NAMLEN (dp);
	  name = DECODE_FILE (make_string (dp->d_name, len));
	  len = STRING_BYTES (XSTRING (name));

225 226 227 228 229
	  /* Now that we have unwind_protect in place, we might as well
             allow matching to be interrupted.  */
	  immediate_quit = 1;
	  QUIT;

Jim Blandy's avatar
Jim Blandy committed
230
	  if (NILP (match)
231
	      || (0 <= re_search (bufp, XSTRING (name)->data, len, 0, len, 0)))
232 233 234 235 236 237 238
	    {
	      wanted = 1;
	    }

	  immediate_quit = 0;

	  if (wanted)
Richard M. Stallman's avatar
Richard M. Stallman committed
239
	    {
240 241 242
	      Lisp_Object finalname;

	      finalname = name;
Jim Blandy's avatar
Jim Blandy committed
243
	      if (!NILP (full))
Richard M. Stallman's avatar
Richard M. Stallman committed
244
		{
245 246
		  int afterdirindex = dirnamelen;
		  int total = len + dirnamelen;
247
		  int nchars;
248
		  Lisp_Object fullname;
249

250 251 252
		  fullname = make_uninit_multibyte_string (total + needsep,
							   total + needsep);
		  bcopy (XSTRING (directory)->data, XSTRING (fullname)->data,
253 254
			 dirnamelen);
		  if (needsep)
255 256 257 258
		    XSTRING (fullname)->data[afterdirindex++] = DIRECTORY_SEP;
		  bcopy (XSTRING (name)->data,
			 XSTRING (fullname)->data + afterdirindex, len);
		  nchars = chars_in_text (XSTRING (fullname)->data,
259
					  afterdirindex + len);
260 261 262
		  XSTRING (fullname)->size = nchars;
		  if (nchars == STRING_BYTES (XSTRING (fullname)))
		    SET_STRING_BYTES (XSTRING (fullname), -1);
263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280
		  finalname = fullname;
		}

	      if (attrs)
		{
		  /* Construct an expanded filename for the directory entry.
		     Use the decoded names for input to Ffile_attributes.  */
		  Lisp_Object decoded_fullname;
		  Lisp_Object fileattrs;

		  decoded_fullname = Fexpand_file_name (name, directory);
		  fileattrs = Ffile_attributes (decoded_fullname);

		  list = Fcons (Fcons (finalname, fileattrs), list);
		}
	      else
		{
		  list = Fcons (finalname, list);
Richard M. Stallman's avatar
Richard M. Stallman committed
281 282 283 284
		}
	    }
	}
    }
285

Richard M. Stallman's avatar
Richard M. Stallman committed
286
  closedir (d);
287 288 289 290

  /* Discard the unwind protect.  */
  specpdl_ptr = specpdl + count;

291
  UNGCPRO;
Jim Blandy's avatar
Jim Blandy committed
292
  if (!NILP (nosort))
Richard M. Stallman's avatar
Richard M. Stallman committed
293
    return list;
294 295 296 297
  if (attrs)
    return Fsort (Fnreverse (list), Qfile_attributes_lessp);
  else
    return Fsort (Fnreverse (list), Qstring_lessp);
Richard M. Stallman's avatar
Richard M. Stallman committed
298
}
299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364


DEFUN ("directory-files", Fdirectory_files, Sdirectory_files, 1, 4, 0,
  "Return a list of names of files in DIRECTORY.\n\
There are three optional arguments:\n\
If FULL is non-nil, return absolute file names.  Otherwise return names\n\
 that are relative to the specified directory.\n\
If MATCH is non-nil, mention only file names that match the regexp MATCH.\n\
If NOSORT is non-nil, the list is not sorted--its order is unpredictable.\n\
 NOSORT is useful if you plan to sort the result yourself.")
  (directory, full, match, nosort)
     Lisp_Object directory, full, match, nosort;
{
  Lisp_Object handler;

  /* If the file name has special constructs in it,
     call the corresponding file handler.  */
  handler = Ffind_file_name_handler (directory, Qdirectory_files);
  if (!NILP (handler))
    {
      Lisp_Object args[6];

      args[0] = handler;
      args[1] = Qdirectory_files;
      args[2] = directory;
      args[3] = full;
      args[4] = match;
      args[5] = nosort;
      return Ffuncall (6, args);
    }

  return directory_files_internal (directory, full, match, nosort, 0);
}

DEFUN ("directory-files-and-attributes", Fdirectory_files_and_attributes, Sdirectory_files_and_attributes, 1, 4, 0,
  "Return a list of names of files and their attributes in DIRECTORY.\n\
There are three optional arguments:\n\
If FULL is non-nil, return absolute file names.  Otherwise return names\n\
 that are relative to the specified directory.\n\
If MATCH is non-nil, mention only file names that match the regexp MATCH.\n\
If NOSORT is non-nil, the list is not sorted--its order is unpredictable.\n\
 NOSORT is useful if you plan to sort the result yourself.")
  (directory, full, match, nosort)
     Lisp_Object directory, full, match, nosort;
{
  Lisp_Object handler;

  /* If the file name has special constructs in it,
     call the corresponding file handler.  */
  handler = Ffind_file_name_handler (directory, Qdirectory_files_and_attributes);
  if (!NILP (handler))
    {
      Lisp_Object args[6];

      args[0] = handler;
      args[1] = Qdirectory_files_and_attributes;
      args[2] = directory;
      args[3] = full;
      args[4] = match;
      args[5] = nosort;
      return Ffuncall (6, args);
    }

  return directory_files_internal (directory, full, match, nosort, 1);
}

Richard M. Stallman's avatar
Richard M. Stallman committed
365 366 367 368 369

Lisp_Object file_name_completion ();

DEFUN ("file-name-completion", Ffile_name_completion, Sfile_name_completion,
  2, 2, 0,
370
  "Complete file name FILE in directory DIRECTORY.\n\
Richard M. Stallman's avatar
Richard M. Stallman committed
371
Returns the longest string\n\
372
common to all file names in DIRECTORY that start with FILE.\n\
Richard M. Stallman's avatar
Richard M. Stallman committed
373 374
If there is only one and FILE matches it exactly, returns t.\n\
Returns nil if DIR contains no name starting with FILE.")
375 376
  (file, directory)
     Lisp_Object file, directory;
Richard M. Stallman's avatar
Richard M. Stallman committed
377
{
378 379
  Lisp_Object handler;

380
  /* If the directory name has special constructs in it,
381
     call the corresponding file handler.  */
382
  handler = Ffind_file_name_handler (directory, Qfile_name_completion);
383
  if (!NILP (handler))
384
    return call3 (handler, Qfile_name_completion, file, directory);
385

386 387 388 389
  /* If the file name has special constructs in it,
     call the corresponding file handler.  */
  handler = Ffind_file_name_handler (file, Qfile_name_completion);
  if (!NILP (handler))
390
    return call3 (handler, Qfile_name_completion, file, directory);
391

392
  return file_name_completion (file, directory, 0, 0);
Richard M. Stallman's avatar
Richard M. Stallman committed
393 394 395 396
}

DEFUN ("file-name-all-completions", Ffile_name_all_completions,
  Sfile_name_all_completions, 2, 2, 0,
397 398 399 400
  "Return a list of all completions of file name FILE in directory DIRECTORY.\n\
These are all file names in directory DIRECTORY which begin with FILE.")
  (file, directory)
     Lisp_Object file, directory;
Richard M. Stallman's avatar
Richard M. Stallman committed
401
{
402 403
  Lisp_Object handler;

404
  /* If the directory name has special constructs in it,
405
     call the corresponding file handler.  */
406
  handler = Ffind_file_name_handler (directory, Qfile_name_all_completions);
407
  if (!NILP (handler))
408
    return call3 (handler, Qfile_name_all_completions, file, directory);
409

410 411 412 413
  /* If the file name has special constructs in it,
     call the corresponding file handler.  */
  handler = Ffind_file_name_handler (file, Qfile_name_all_completions);
  if (!NILP (handler))
414
    return call3 (handler, Qfile_name_all_completions, file, directory);
415

416
  return file_name_completion (file, directory, 1, 0);
Richard M. Stallman's avatar
Richard M. Stallman committed
417 418
}

Andreas Schwab's avatar
Andreas Schwab committed
419 420
static int file_name_completion_stat ();

Richard M. Stallman's avatar
Richard M. Stallman committed
421 422 423 424 425 426 427
Lisp_Object
file_name_completion (file, dirname, all_flag, ver_flag)
     Lisp_Object file, dirname;
     int all_flag, ver_flag;
{
  DIR *d;
  DIRENTRY *dp;
428
  int bestmatchsize = 0, skip;
Richard M. Stallman's avatar
Richard M. Stallman committed
429 430 431 432
  register int compare, matchsize;
  unsigned char *p1, *p2;
  int matchcount = 0;
  Lisp_Object bestmatch, tem, elt, name;
433 434
  Lisp_Object encoded_file;
  Lisp_Object encoded_dir;
Richard M. Stallman's avatar
Richard M. Stallman committed
435 436 437 438
  struct stat st;
  int directoryp;
  int passcount;
  int count = specpdl_ptr - specpdl;
439
  struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5;
440

441 442
  elt = Qnil;

Richard M. Stallman's avatar
Richard M. Stallman committed
443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458
#ifdef VMS
  extern DIRENTRY * readdirver ();

  DIRENTRY *((* readfunc) ());

  /* Filename completion on VMS ignores case, since VMS filesys does.  */
  specbind (Qcompletion_ignore_case, Qt);

  readfunc = readdir;
  if (ver_flag)
    readfunc = readdirver;
  file = Fupcase (file);
#else  /* not VMS */
  CHECK_STRING (file, 0);
#endif /* not VMS */

459 460 461
#ifdef FILE_SYSTEM_CASE
  file = FILE_SYSTEM_CASE (file);
#endif
Richard M. Stallman's avatar
Richard M. Stallman committed
462
  bestmatch = Qnil;
463 464
  encoded_file = encoded_dir = Qnil;
  GCPRO5 (file, dirname, bestmatch, encoded_file, encoded_dir);
465
  dirname = Fexpand_file_name (dirname, Qnil);
Richard M. Stallman's avatar
Richard M. Stallman committed
466

467 468 469 470 471 472 473
  /* Do completion on the encoded file name
     because the other names in the directory are (we presume)
     encoded likewise.  We decode the completed string at the end.  */
  encoded_file = ENCODE_FILE (file);

  encoded_dir = ENCODE_FILE (dirname);

Richard M. Stallman's avatar
Richard M. Stallman committed
474 475 476 477 478 479 480 481
  /* With passcount = 0, ignore files that end in an ignored extension.
     If nothing found then try again with passcount = 1, don't ignore them.
     If looking for all completions, start with passcount = 1,
     so always take even the ignored ones.

     ** It would not actually be helpful to the user to ignore any possible
     completions when making a list of them.**  */

Jim Blandy's avatar
Jim Blandy committed
482
  for (passcount = !!all_flag; NILP (bestmatch) && passcount < 2; passcount++)
Richard M. Stallman's avatar
Richard M. Stallman committed
483
    {
484 485
      d = opendir (XSTRING (Fdirectory_file_name (encoded_dir))->data);
      if (!d)
Richard M. Stallman's avatar
Richard M. Stallman committed
486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503
	report_file_error ("Opening directory", Fcons (dirname, Qnil));

      /* Loop reading blocks */
      /* (att3b compiler bug requires do a null comparison this way) */
      while (1)
	{
	  DIRENTRY *dp;
	  int len;

#ifdef VMS
	  dp = (*readfunc) (d);
#else
	  dp = readdir (d);
#endif
	  if (!dp) break;

	  len = NAMLEN (dp);

Jim Blandy's avatar
Jim Blandy committed
504
	  if (!NILP (Vquit_flag) && NILP (Vinhibit_quit))
Richard M. Stallman's avatar
Richard M. Stallman committed
505
	    goto quit;
506
	  if (! DIRENTRY_NONEMPTY (dp)
507 508 509
	      || len < XSTRING (encoded_file)->size
	      || 0 <= scmp (dp->d_name, XSTRING (encoded_file)->data,
			    XSTRING (encoded_file)->size))
Richard M. Stallman's avatar
Richard M. Stallman committed
510 511
	    continue;

512
          if (file_name_completion_stat (encoded_dir, dp, &st) < 0)
Richard M. Stallman's avatar
Richard M. Stallman committed
513 514 515 516
            continue;

          directoryp = ((st.st_mode & S_IFMT) == S_IFDIR);
	  tem = Qnil;
517 518 519 520 521 522 523 524 525 526 527
          if (directoryp)
	    {
#ifndef TRIVIAL_DIRECTORY_ENTRY
#define TRIVIAL_DIRECTORY_ENTRY(n) (!strcmp (n, ".") || !strcmp (n, ".."))
#endif
	      /* "." and ".." are never interesting as completions, but are
		 actually in the way in a directory contains only one file.  */
	      if (!passcount && TRIVIAL_DIRECTORY_ENTRY (dp->d_name))
		continue;
	    }
	  else
Richard M. Stallman's avatar
Richard M. Stallman committed
528 529 530
            {
	      /* Compare extensions-to-be-ignored against end of this file name */
	      /* if name is not an exact match against specified string */
531
	      if (!passcount && len > XSTRING (encoded_file)->size)
Richard M. Stallman's avatar
Richard M. Stallman committed
532 533
		/* and exit this for loop if a match is found */
		for (tem = Vcompletion_ignored_extensions;
534
		     CONSP (tem); tem = XCDR (tem))
Richard M. Stallman's avatar
Richard M. Stallman committed
535
		  {
536
		    elt = XCAR (tem);
537
		    if (!STRINGP (elt)) continue;
Richard M. Stallman's avatar
Richard M. Stallman committed
538 539 540 541 542 543 544 545 546 547 548
		    skip = len - XSTRING (elt)->size;
		    if (skip < 0) continue;

		    if (0 <= scmp (dp->d_name + skip,
				   XSTRING (elt)->data,
				   XSTRING (elt)->size))
		      continue;
		    break;
		  }
	    }

549 550 551 552 553 554
	  /* If an ignored-extensions match was found,
	     don't process this name as a completion.  */
	  if (!passcount && CONSP (tem))
	    continue;

	  if (!passcount)
Richard M. Stallman's avatar
Richard M. Stallman committed
555
	    {
556 557
	      Lisp_Object regexps;
	      Lisp_Object zero;
558
	      XSETFASTINT (zero, 0);
559 560 561

	      /* Ignore this element if it fails to match all the regexps.  */
	      for (regexps = Vcompletion_regexp_list; CONSP (regexps);
562
		   regexps = XCDR (regexps))
563
		{
564
		  tem = Fstring_match (XCAR (regexps), elt, zero);
565 566 567 568 569 570
		  if (NILP (tem))
		    break;
		}
	      if (CONSP (regexps))
		continue;
	    }
Richard M. Stallman's avatar
Richard M. Stallman committed
571

572
	  /* Update computation of how much all possible completions match */
Richard M. Stallman's avatar
Richard M. Stallman committed
573

574 575 576 577 578 579
	  matchcount++;

	  if (all_flag || NILP (bestmatch))
	    {
	      /* This is a possible completion */
	      if (directoryp)
Richard M. Stallman's avatar
Richard M. Stallman committed
580
		{
581 582 583 584 585 586 587
		  /* This completion is a directory; make it end with '/' */
		  name = Ffile_name_as_directory (make_string (dp->d_name, len));
		}
	      else
		name = make_string (dp->d_name, len);
	      if (all_flag)
		{
588
		  name = DECODE_FILE (name);
589
		  bestmatch = Fcons (name, bestmatch);
Richard M. Stallman's avatar
Richard M. Stallman committed
590 591 592
		}
	      else
		{
593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610
		  bestmatch = name;
		  bestmatchsize = XSTRING (name)->size;
		}
	    }
	  else
	    {
	      compare = min (bestmatchsize, len);
	      p1 = XSTRING (bestmatch)->data;
	      p2 = (unsigned char *) dp->d_name;
	      matchsize = scmp(p1, p2, compare);
	      if (matchsize < 0)
		matchsize = compare;
	      if (completion_ignore_case)
		{
		  /* If this is an exact match except for case,
		     use it as the best match rather than one that is not
		     an exact match.  This way, we get the case pattern
		     of the actual match.  */
Richard M. Stallman's avatar
Richard M. Stallman committed
611 612
		  /* This tests that the current file is an exact match
		     but BESTMATCH is not (it is too long).  */
613 614 615 616 617 618 619
		  if ((matchsize == len
		       && matchsize + !!directoryp 
			  < XSTRING (bestmatch)->size)
		      ||
		      /* If there is no exact match ignoring case,
			 prefer a match that does not change the case
			 of the input.  */
Richard M. Stallman's avatar
Richard M. Stallman committed
620 621 622 623 624
		      /* If there is more than one exact match aside from
			 case, and one of them is exact including case,
			 prefer that one.  */
		      /* This == checks that, of current file and BESTMATCH,
			 either both or neither are exact.  */
625 626 627 628
		      (((matchsize == len)
			==
			(matchsize + !!directoryp 
			 == XSTRING (bestmatch)->size))
629 630
		       && !bcmp (p2, XSTRING (encoded_file)->data, XSTRING (encoded_file)->size)
		       && bcmp (p1, XSTRING (encoded_file)->data, XSTRING (encoded_file)->size)))
631
		    {
632 633 634
		      bestmatch = make_string (dp->d_name, len);
		      if (directoryp)
			bestmatch = Ffile_name_as_directory (bestmatch);
635
		    }
Richard M. Stallman's avatar
Richard M. Stallman committed
636
		}
637 638 639 640 641 642

	      /* If this dirname all matches, see if implicit following
		 slash does too.  */
	      if (directoryp
		  && compare == matchsize
		  && bestmatchsize > matchsize
643
		  && IS_ANY_SEP (p1[matchsize]))
644 645
		matchsize++;
	      bestmatchsize = matchsize;
Richard M. Stallman's avatar
Richard M. Stallman committed
646 647 648 649 650
	    }
	}
      closedir (d);
    }

651 652
  UNGCPRO;
  bestmatch = unbind_to (count, bestmatch);
Richard M. Stallman's avatar
Richard M. Stallman committed
653

Jim Blandy's avatar
Jim Blandy committed
654
  if (all_flag || NILP (bestmatch))
655
    {
656 657
      if (STRINGP (bestmatch))
	bestmatch = DECODE_FILE (bestmatch);
658 659
      return bestmatch;
    }
Richard M. Stallman's avatar
Richard M. Stallman committed
660 661
  if (matchcount == 1 && bestmatchsize == XSTRING (file)->size)
    return Qt;
662 663 664 665
  bestmatch = Fsubstring (bestmatch, make_number (0),
			  make_number (bestmatchsize));
  /* Now that we got the right initial segment of BESTMATCH,
     decode it from the coding system in use.  */
666
  bestmatch = DECODE_FILE (bestmatch);
667 668
  return bestmatch;

Richard M. Stallman's avatar
Richard M. Stallman committed
669 670 671 672 673 674
 quit:
  if (d) closedir (d);
  Vquit_flag = Qnil;
  return Fsignal (Qquit, Qnil);
}

Andreas Schwab's avatar
Andreas Schwab committed
675
static int
Richard M. Stallman's avatar
Richard M. Stallman committed
676 677 678 679 680 681 682
file_name_completion_stat (dirname, dp, st_addr)
     Lisp_Object dirname;
     DIRENTRY *dp;
     struct stat *st_addr;
{
  int len = NAMLEN (dp);
  int pos = XSTRING (dirname)->size;
683
  int value;
Richard M. Stallman's avatar
Richard M. Stallman committed
684 685
  char *fullname = (char *) alloca (len + pos + 2);

686 687 688 689 690 691 692 693 694 695 696 697 698
#ifdef MSDOS
#if __DJGPP__ > 1
  /* Some fields of struct stat are *very* expensive to compute on MS-DOS,
     but aren't required here.  Avoid computing the following fields:
     st_inode, st_size and st_nlink for directories, and the execute bits
     in st_mode for non-directory files with non-standard extensions.  */

  unsigned short save_djstat_flags = _djstat_flags;

  _djstat_flags = _STAT_INODE | _STAT_EXEC_MAGIC | _STAT_DIRSIZE;
#endif /* __DJGPP__ > 1 */
#endif /* MSDOS */

Richard M. Stallman's avatar
Richard M. Stallman committed
699 700
  bcopy (XSTRING (dirname)->data, fullname, pos);
#ifndef VMS
701 702
  if (!IS_DIRECTORY_SEP (fullname[pos - 1]))
    fullname[pos++] = DIRECTORY_SEP;
Richard M. Stallman's avatar
Richard M. Stallman committed
703 704 705 706 707
#endif

  bcopy (dp->d_name, fullname + pos, len);
  fullname[pos + len] = 0;

708
#ifdef S_IFLNK
709 710 711 712 713 714
  /* We want to return success if a link points to a nonexistent file,
     but we want to return the status for what the link points to,
     in case it is a directory.  */
  value = lstat (fullname, st_addr);
  stat (fullname, st_addr);
  return value;
715
#else
716 717 718 719 720 721 722 723
  value = stat (fullname, st_addr);
#ifdef MSDOS
#if __DJGPP__ > 1
  _djstat_flags = save_djstat_flags;
#endif /* __DJGPP__ > 1 */
#endif /* MSDOS */
  return value;
#endif /* S_IFLNK */
Richard M. Stallman's avatar
Richard M. Stallman committed
724 725
}

726 727 728 729
#ifdef VMS

DEFUN ("file-name-all-versions", Ffile_name_all_versions,
  Sfile_name_all_versions, 2, 2, 0,
730 731 732
  "Return a list of all versions of file name FILE in directory DIRECTORY.")
  (file, directory)
     Lisp_Object file, directory;
733
{
734
  return file_name_completion (file, directory, 1, 1);
735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766
}

DEFUN ("file-version-limit", Ffile_version_limit, Sfile_version_limit, 1, 1, 0,
  "Return the maximum number of versions allowed for FILE.\n\
Returns nil if the file cannot be opened or if there is no version limit.")
  (filename)
     Lisp_Object filename;
{
  Lisp_Object retval;
  struct FAB    fab;
  struct RAB    rab;
  struct XABFHC xabfhc;
  int status;

  filename = Fexpand_file_name (filename, Qnil);
  fab      = cc$rms_fab;
  xabfhc   = cc$rms_xabfhc;
  fab.fab$l_fna = XSTRING (filename)->data;
  fab.fab$b_fns = strlen (fab.fab$l_fna);
  fab.fab$l_xab = (char *) &xabfhc;
  status = sys$open (&fab, 0, 0);
  if (status != RMS$_NORMAL)	/* Probably non-existent file */
    return Qnil;
  sys$close (&fab, 0, 0);
  if (xabfhc.xab$w_verlimit == 32767)
    return Qnil;		/* No version limit */
  else
    return make_number (xabfhc.xab$w_verlimit);
}

#endif /* VMS */

Richard M. Stallman's avatar
Richard M. Stallman committed
767 768
Lisp_Object
make_time (time)
769
     time_t time;
Richard M. Stallman's avatar
Richard M. Stallman committed
770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786
{
  return Fcons (make_number (time >> 16),
		Fcons (make_number (time & 0177777), Qnil));
}

DEFUN ("file-attributes", Ffile_attributes, Sfile_attributes, 1, 1, 0,
  "Return a list of attributes of file FILENAME.\n\
Value is nil if specified file cannot be opened.\n\
Otherwise, list elements are:\n\
 0. t for directory, string (name linked to) for symbolic link, or nil.\n\
 1. Number of links to file.\n\
 2. File uid.\n\
 3. File gid.\n\
 4. Last access time, as a list of two integers.\n\
  First integer has high-order 16 bits of time, second has low 16 bits.\n\
 5. Last modification time, likewise.\n\
 6. Last status change time, likewise.\n\
787 788
 7. Size in bytes.\n\
  This is a floating point number if the size is too large for an integer.\n\
Richard M. Stallman's avatar
Richard M. Stallman committed
789 790
 8. File modes, as a string of ten letters or dashes as in ls -l.\n\
 9. t iff file's gid would change if file were deleted and recreated.\n\
791
10. inode number.  If inode number is larger than the Emacs integer,\n\
792 793
  this is a cons cell containing two integers: first the high part,\n\
  then the low 16 bits.\n\
Richard M. Stallman's avatar
Richard M. Stallman committed
794 795
11. Device number.\n\
\n\
796
If file does not exist, returns nil.")
Richard M. Stallman's avatar
Richard M. Stallman committed
797 798 799 800 801
  (filename)
     Lisp_Object filename;
{
  Lisp_Object values[12];
  Lisp_Object dirname;
802
  Lisp_Object encoded;
Richard M. Stallman's avatar
Richard M. Stallman committed
803 804 805
  struct stat s;
  struct stat sdir;
  char modes[10];
806
  Lisp_Object handler;
Richard M. Stallman's avatar
Richard M. Stallman committed
807 808

  filename = Fexpand_file_name (filename, Qnil);
809 810 811

  /* If the file name has special constructs in it,
     call the corresponding file handler.  */
812
  handler = Ffind_file_name_handler (filename, Qfile_attributes);
813 814 815
  if (!NILP (handler))
    return call2 (handler, Qfile_attributes, filename);

816 817 818
  encoded = ENCODE_FILE (filename);

  if (lstat (XSTRING (encoded)->data, &s) < 0)
Richard M. Stallman's avatar
Richard M. Stallman committed
819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837
    return Qnil;

  switch (s.st_mode & S_IFMT)
    {
    default:
      values[0] = Qnil; break;
    case S_IFDIR:
      values[0] = Qt; break;
#ifdef S_IFLNK
    case S_IFLNK:
      values[0] = Ffile_symlink_p (filename); break;
#endif
    }
  values[1] = make_number (s.st_nlink);
  values[2] = make_number (s.st_uid);
  values[3] = make_number (s.st_gid);
  values[4] = make_time (s.st_atime);
  values[5] = make_time (s.st_mtime);
  values[6] = make_time (s.st_ctime);
838
  values[7] = make_number (s.st_size);
839
  /* If the size is out of range for an integer, return a float.  */
840
  if (XINT (values[7]) != s.st_size)
841
    values[7] = make_float ((double)s.st_size);
Richard M. Stallman's avatar
Richard M. Stallman committed
842 843 844
  filemodestring (&s, modes);
  values[8] = make_string (modes, 10);
#ifdef BSD4_3 /* Gross kludge to avoid lack of "#if defined(...)" in VMS */
845
#define BSD4_2 /* A new meaning to the term `backwards compatibility' */
Richard M. Stallman's avatar
Richard M. Stallman committed
846 847 848
#endif
#ifdef BSD4_2			/* file gid will be dir gid */
  dirname = Ffile_name_directory (filename);
849 850 851
  if (! NILP (dirname))
    encoded = ENCODE_FILE (dirname);
  if (! NILP (dirname) && stat (XSTRING (encoded)->data, &sdir) == 0)
Richard M. Stallman's avatar
Richard M. Stallman committed
852 853 854 855 856 857 858 859 860
    values[9] = (sdir.st_gid != s.st_gid) ? Qt : Qnil;
  else					/* if we can't tell, assume worst */
    values[9] = Qt;
#else					/* file gid will be egid */
  values[9] = (s.st_gid != getegid ()) ? Qt : Qnil;
#endif	/* BSD4_2 (or BSD4_3) */
#ifdef BSD4_3
#undef BSD4_2 /* ok, you can look again without throwing up */
#endif
861 862
  /* Cast -1 to avoid warning if int is not as wide as VALBITS.  */
  if (s.st_ino & (((EMACS_INT) (-1)) << VALBITS))
863 864 865 866 867 868 869
    /* To allow inode numbers larger than VALBITS, separate the bottom
       16 bits.  */
    values[10] = Fcons (make_number (s.st_ino >> 16),
			make_number (s.st_ino & 0xffff));
  else
    /* But keep the most common cases as integers.  */
    values[10] = make_number (s.st_ino);
870 871 872 873 874 875 876 877

  /* Likewise for device.  */
  if (s.st_dev & (((EMACS_INT) (-1)) << VALBITS))
    values[11] = Fcons (make_number (s.st_dev >> 16),
			make_number (s.st_dev & 0xffff));
  else
    values[11] = make_number (s.st_dev);

Richard M. Stallman's avatar
Richard M. Stallman committed
878 879
  return Flist (sizeof(values) / sizeof(values[0]), values);
}
880 881 882 883 884 885 886 887 888

DEFUN ("file-attributes-lessp", Ffile_attributes_lessp, Sfile_attributes_lessp, 2, 2, 0,
  "Return t if first arg file attributes list is less than second.\n\
Comparison is in lexicographic order and case is significant.")
  (f1, f2)
     Lisp_Object f1, f2;
{
  return Fstring_lessp (Fcar (f1), Fcar (f2));
}
Richard M. Stallman's avatar
Richard M. Stallman committed
889

Andreas Schwab's avatar
Andreas Schwab committed
890
void
Richard M. Stallman's avatar
Richard M. Stallman committed
891 892
syms_of_dired ()
{
893
  Qdirectory_files = intern ("directory-files");
894
  Qdirectory_files_and_attributes = intern ("directory-files-and-attributes");
895 896
  Qfile_name_completion = intern ("file-name-completion");
  Qfile_name_all_completions = intern ("file-name-all-completions");
Jim Blandy's avatar
Jim Blandy committed
897
  Qfile_attributes = intern ("file-attributes");
898
  Qfile_attributes_lessp = intern ("file-attributes-lessp");
899

900
  staticpro (&Qdirectory_files);
901
  staticpro (&Qdirectory_files_and_attributes);
902 903 904
  staticpro (&Qfile_name_completion);
  staticpro (&Qfile_name_all_completions);
  staticpro (&Qfile_attributes);
905
  staticpro (&Qfile_attributes_lessp);
906

Richard M. Stallman's avatar
Richard M. Stallman committed
907
  defsubr (&Sdirectory_files);
908
  defsubr (&Sdirectory_files_and_attributes);
Richard M. Stallman's avatar
Richard M. Stallman committed
909 910 911
  defsubr (&Sfile_name_completion);
#ifdef VMS
  defsubr (&Sfile_name_all_versions);
912
  defsubr (&Sfile_version_limit);
Richard M. Stallman's avatar
Richard M. Stallman committed
913 914 915
#endif /* VMS */
  defsubr (&Sfile_name_all_completions);
  defsubr (&Sfile_attributes);
916
  defsubr (&Sfile_attributes_lessp);
Richard M. Stallman's avatar
Richard M. Stallman committed
917 918 919 920 921 922 923 924 925 926 927 928

#ifdef VMS
  Qcompletion_ignore_case = intern ("completion-ignore-case");
  staticpro (&Qcompletion_ignore_case);
#endif /* VMS */

  DEFVAR_LISP ("completion-ignored-extensions", &Vcompletion_ignored_extensions,
    "*Completion ignores filenames ending in any string in this list.\n\
This variable does not affect lists of possible completions,\n\
but does affect the commands that actually do completions.");
  Vcompletion_ignored_extensions = Qnil;
}