summaryrefslogtreecommitdiff
path: root/src/dired.c
blob: 0ccbfd8560160131aa6ab9402a246f95c4e8702d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
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
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
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
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
/* Lisp functions for making directory listings.
   Copyright (C) 1985, 1986, 1993, 1994, 1999, 2000, 2001, 2002, 2003,
                 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.

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
the Free Software Foundation; either version 3, or (at your option)
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
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.  */


#include <config.h>

#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>

#ifdef HAVE_PWD_H
#include <pwd.h>
#endif
#ifndef VMS
#include <grp.h>
#endif

#include <errno.h>

#ifdef VMS
#include <string.h>
#include <rms.h>
#include <rmsdef.h>
#endif

#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

/* 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)

#ifdef SYSV_SYSTEM_DIR

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

#else /* not SYSV_SYSTEM_DIR */

#ifdef NONSYSTEM_DIR_LIBRARY
#include "ndir.h"
#else /* not NONSYSTEM_DIR_LIBRARY */
#ifdef MSDOS
#include <dirent.h>
#else
#include <sys/dir.h>
#endif
#endif /* not NONSYSTEM_DIR_LIBRARY */

#include <sys/stat.h>

#ifndef MSDOS
#define DIRENTRY struct direct

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

#endif /* not MSDOS */
#endif /* not SYSV_SYSTEM_DIR */

/* Some versions of Cygwin don't have d_ino in `struct dirent'.  */
#if defined(MSDOS) || defined(__CYGWIN__)
#define DIRENTRY_NONEMPTY(p) ((p)->d_name[0] != 0)
#else
#define DIRENTRY_NONEMPTY(p) ((p)->d_ino)
#endif

#include "lisp.h"
#include "systime.h"
#include "buffer.h"
#include "commands.h"
#include "charset.h"
#include "coding.h"
#include "regex.h"
#include "blockinput.h"

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

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

/* 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

extern int completion_ignore_case;
extern Lisp_Object Qcompletion_ignore_case;
extern Lisp_Object Vcompletion_regexp_list;

Lisp_Object Vcompletion_ignored_extensions;
Lisp_Object Qdirectory_files;
Lisp_Object Qdirectory_files_and_attributes;
Lisp_Object Qfile_name_completion;
Lisp_Object Qfile_name_all_completions;
Lisp_Object Qfile_attributes;
Lisp_Object Qfile_attributes_lessp;

static int scmp P_ ((unsigned char *, unsigned char *, int));


Lisp_Object
directory_files_internal_unwind (dh)
     Lisp_Object dh;
{
  DIR *d = (DIR *) XSAVE_VALUE (dh)->pointer;
  BLOCK_INPUT;
  closedir (d);
  UNBLOCK_INPUT;
  return Qnil;
}

/* 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.
   In the latter case, ID_FORMAT is passed to Ffile_attributes.  */

Lisp_Object
directory_files_internal (directory, full, match, nosort, attrs, id_format)
     Lisp_Object directory, full, match, nosort;
     int attrs;
     Lisp_Object id_format;
{
  DIR *d;
  int directory_nbytes;
  Lisp_Object list, dirfilename, encoded_directory;
  struct re_pattern_buffer *bufp = NULL;
  int needsep = 0;
  int count = SPECPDL_INDEX ();
  struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5;
  DIRENTRY *dp;

  /* Because of file name handlers, these functions might call
     Ffuncall, and cause a GC.  */
  list = encoded_directory = dirfilename = Qnil;
  GCPRO5 (match, directory, list, dirfilename, encoded_directory);
  dirfilename = Fdirectory_file_name (directory);

  if (!NILP (match))
    {
      CHECK_STRING (match);

      /* MATCH might be a flawed regular expression.  Rather than
	 catching and signaling our own errors, we just call
	 compile_pattern to do the work for us.  */
      /* Pass 1 for the MULTIBYTE arg
	 because we do make multibyte strings if the contents warrant.  */
#ifdef VMS
      bufp = compile_pattern (match, 0,
			      buffer_defaults.downcase_table, 0, 1);
#else  /* !VMS */
# ifdef WINDOWSNT
      /* Windows users want case-insensitive wildcards.  */
      bufp = compile_pattern (match, 0,
			      buffer_defaults.case_canon_table, 0, 1);
# else	/* !WINDOWSNT */
      bufp = compile_pattern (match, 0, Qnil, 0, 1);
# endif	 /* !WINDOWSNT */
#endif	 /* !VMS */
    }

  /* Note: ENCODE_FILE and DECODE_FILE can GC because they can run
     run_pre_post_conversion_on_str which calls Lisp directly and
     indirectly.  */
  dirfilename = ENCODE_FILE (dirfilename);
  encoded_directory = ENCODE_FILE (directory);

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

  BLOCK_INPUT;
  d = opendir (SDATA (dirfilename));
  UNBLOCK_INPUT;
  if (d == NULL)
    report_file_error ("Opening directory", Fcons (directory, Qnil));

  /* 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,
			 make_save_value (d, 0));

  directory_nbytes = SBYTES (directory);
  re_match_object = Qt;

  /* Decide whether we need to add a directory separator.  */
#ifndef VMS
  if (directory_nbytes == 0
      || !IS_ANY_SEP (SREF (directory, directory_nbytes - 1)))
    needsep = 1;
#endif /* not VMS */

  /* Loop reading blocks until EOF or error.  */
  for (;;)
    {
      errno = 0;
      dp = readdir (d);

      if (dp == NULL && (0
#ifdef EAGAIN
			 || errno == EAGAIN
#endif
#ifdef EINTR
			 || errno == EINTR
#endif
			 ))
	{ QUIT; continue; }

      if (dp == NULL)
	break;

      if (DIRENTRY_NONEMPTY (dp))
	{
	  int len;
	  int wanted = 0;
	  Lisp_Object name, finalname;
	  struct gcpro gcpro1, gcpro2;

	  len = NAMLEN (dp);
	  name = finalname = make_unibyte_string (dp->d_name, len);
	  GCPRO2 (finalname, name);

	  /* Note: ENCODE_FILE can GC; it should protect its argument,
	     though.  */
	  name = DECODE_FILE (name);
	  len = SBYTES (name);

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

	  if (NILP (match)
	      || (0 <= re_search (bufp, SDATA (name), len, 0, len, 0)))
	    wanted = 1;

	  immediate_quit = 0;

	  if (wanted)
	    {
	      if (!NILP (full))
		{
		  Lisp_Object fullname;
		  int nbytes = len + directory_nbytes + needsep;
		  int nchars;

		  fullname = make_uninit_multibyte_string (nbytes, nbytes);
		  bcopy (SDATA (directory), SDATA (fullname),
			 directory_nbytes);

		  if (needsep)
		    SSET (fullname, directory_nbytes, DIRECTORY_SEP);

		  bcopy (SDATA (name),
			 SDATA (fullname) + directory_nbytes + needsep,
			 len);

		  nchars = chars_in_text (SDATA (fullname), nbytes);

		  /* Some bug somewhere.  */
		  if (nchars > nbytes)
		    abort ();

		  STRING_SET_CHARS (fullname, nchars);
		  if (nchars == nbytes)
		    STRING_SET_UNIBYTE (fullname);

		  finalname = fullname;
		}
	      else
		finalname = name;

	      if (attrs)
		{
		  /* Construct an expanded filename for the directory entry.
		     Use the decoded names for input to Ffile_attributes.  */
		  Lisp_Object decoded_fullname, fileattrs;
		  struct gcpro gcpro1, gcpro2;

		  decoded_fullname = fileattrs = Qnil;
		  GCPRO2 (decoded_fullname, fileattrs);

		  /* Both Fexpand_file_name and Ffile_attributes can GC.  */
		  decoded_fullname = Fexpand_file_name (name, directory);
		  fileattrs = Ffile_attributes (decoded_fullname, id_format);

		  list = Fcons (Fcons (finalname, fileattrs), list);
		  UNGCPRO;
		}
	      else
		list = Fcons (finalname, list);
	    }

	  UNGCPRO;
	}
    }

  BLOCK_INPUT;
  closedir (d);
  UNBLOCK_INPUT;

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

  if (NILP (nosort))
    list = Fsort (Fnreverse (list),
		  attrs ? Qfile_attributes_lessp : Qstring_lessp);

  RETURN_UNGCPRO (list);
}


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

  /* 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))
    return call5 (handler, Qdirectory_files, directory,
                  full, match, nosort);

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

DEFUN ("directory-files-and-attributes", Fdirectory_files_and_attributes,
       Sdirectory_files_and_attributes, 1, 5, 0,
       doc: /* Return a list of names of files and their attributes in DIRECTORY.
There are four optional arguments:
If FULL is non-nil, return absolute file names.  Otherwise return names
 that are relative to the specified directory.
If MATCH is non-nil, mention only file names that match the regexp MATCH.
If NOSORT is non-nil, the list is not sorted--its order is unpredictable.
 NOSORT is useful if you plan to sort the result yourself.
ID-FORMAT specifies the preferred format of attributes uid and gid, see
`file-attributes' for further documentation. */)
     (directory, full, match, nosort, id_format)
     Lisp_Object directory, full, match, nosort, id_format;
{
  Lisp_Object handler;
  directory = Fexpand_file_name (directory, Qnil);

  /* 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))
    return call6 (handler, Qdirectory_files_and_attributes,
                  directory, full, match, nosort, id_format);

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


Lisp_Object file_name_completion ();

DEFUN ("file-name-completion", Ffile_name_completion, Sfile_name_completion,
       2, 3, 0,
       doc: /* Complete file name FILE in directory DIRECTORY.
Returns the longest string
common to all file names in DIRECTORY that start with FILE.
If there is only one and FILE matches it exactly, returns t.
Returns nil if DIRECTORY contains no name starting with FILE.

If PREDICATE is non-nil, call PREDICATE with each possible
completion (in absolute form) and ignore it if PREDICATE returns nil.

This function ignores some of the possible completions as
determined by the variable `completion-ignored-extensions', which see.  */)
     (file, directory, predicate)
     Lisp_Object file, directory, predicate;
{
  Lisp_Object handler;

  /* If the directory name has special constructs in it,
     call the corresponding file handler.  */
  handler = Ffind_file_name_handler (directory, Qfile_name_completion);
  if (!NILP (handler))
    return call4 (handler, Qfile_name_completion, file, directory, predicate);

  /* 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))
    return call4 (handler, Qfile_name_completion, file, directory, predicate);

  return file_name_completion (file, directory, 0, 0, predicate);
}

DEFUN ("file-name-all-completions", Ffile_name_all_completions,
       Sfile_name_all_completions, 2, 2, 0,
       doc: /* Return a list of all completions of file name FILE in directory DIRECTORY.
These are all file names in directory DIRECTORY which begin with FILE.  */)
     (file, directory)
     Lisp_Object file, directory;
{
  Lisp_Object handler;

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

  /* 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))
    return call3 (handler, Qfile_name_all_completions, file, directory);

  return file_name_completion (file, directory, 1, 0, Qnil);
}

static int file_name_completion_stat ();

Lisp_Object
file_name_completion (file, dirname, all_flag, ver_flag, predicate)
     Lisp_Object file, dirname;
     int all_flag, ver_flag;
     Lisp_Object predicate;
{
  DIR *d;
  int bestmatchsize = 0, skip;
  register int compare, matchsize;
  unsigned char *p1, *p2;
  int matchcount = 0;
  /* If ALL_FLAG is 1, BESTMATCH is the list of all matches, decoded.
     If ALL_FLAG is 0, BESTMATCH is either nil
     or the best match so far, not decoded.  */
  Lisp_Object bestmatch, tem, elt, name;
  Lisp_Object encoded_file;
  Lisp_Object encoded_dir;
  struct stat st;
  int directoryp;
  int passcount;
  int count = SPECPDL_INDEX ();
  struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5;

  elt = Qnil;

#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);
#endif /* not VMS */

#ifdef FILE_SYSTEM_CASE
  file = FILE_SYSTEM_CASE (file);
#endif
  bestmatch = Qnil;
  encoded_file = encoded_dir = Qnil;
  GCPRO5 (file, dirname, bestmatch, encoded_file, encoded_dir);
  dirname = Fexpand_file_name (dirname, Qnil);

  /* 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);

  /* 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.**  */

  for (passcount = !!all_flag; NILP (bestmatch) && passcount < 2; passcount++)
    {
      int inner_count = SPECPDL_INDEX ();

      BLOCK_INPUT;
      d = opendir (SDATA (Fdirectory_file_name (encoded_dir)));
      UNBLOCK_INPUT;
      if (!d)
	report_file_error ("Opening directory", Fcons (dirname, Qnil));

      record_unwind_protect (directory_files_internal_unwind,
                             make_save_value (d, 0));

      /* 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
	  errno = 0;
	  dp = readdir (d);
	  if (dp == NULL && (0
# ifdef EAGAIN
			     || errno == EAGAIN
# endif
# ifdef EINTR
			     || errno == EINTR
# endif
			     ))
	    { QUIT; continue; }
#endif

	  if (!dp) break;

	  len = NAMLEN (dp);

	  QUIT;
	  if (! DIRENTRY_NONEMPTY (dp)
	      || len < SCHARS (encoded_file)
	      || 0 <= scmp (dp->d_name, SDATA (encoded_file),
			    SCHARS (encoded_file)))
	    continue;

          if (file_name_completion_stat (encoded_dir, dp, &st) < 0)
            continue;

          directoryp = ((st.st_mode & S_IFMT) == S_IFDIR);
	  tem = Qnil;
          if (directoryp)
	    {
#ifndef TRIVIAL_DIRECTORY_ENTRY
#define TRIVIAL_DIRECTORY_ENTRY(n) (!strcmp (n, ".") || !strcmp (n, ".."))
#endif
	      /* "." and ".." are never interesting as completions, and are
		 actually in the way in a directory with only one file.  */
	      if (!passcount && TRIVIAL_DIRECTORY_ENTRY (dp->d_name))
		continue;
	      if (!passcount && len > SCHARS (encoded_file))
		/* Ignore directories if they match an element of
		   completion-ignored-extensions which ends in a slash.  */
		for (tem = Vcompletion_ignored_extensions;
		     CONSP (tem); tem = XCDR (tem))
		  {
		    int elt_len;

		    elt = XCAR (tem);
		    if (!STRINGP (elt))
		      continue;
		    /* Need to encode ELT, since scmp compares unibyte
		       strings only.  */
		    elt = ENCODE_FILE (elt);
		    elt_len = SCHARS (elt) - 1; /* -1 for trailing / */
		    if (elt_len <= 0)
		      continue;
		    p1 = SDATA (elt);
		    if (p1[elt_len] != '/')
		      continue;
		    skip = len - elt_len;
		    if (skip < 0)
		      continue;

		    if (0 <= scmp (dp->d_name + skip, p1, elt_len))
		      continue;
		    break;
		  }
	    }
	  else
            {
	      /* Compare extensions-to-be-ignored against end of this file name */
	      /* if name is not an exact match against specified string */
	      if (!passcount && len > SCHARS (encoded_file))
		/* and exit this for loop if a match is found */
		for (tem = Vcompletion_ignored_extensions;
		     CONSP (tem); tem = XCDR (tem))
		  {
		    elt = XCAR (tem);
		    if (!STRINGP (elt)) continue;
		    /* Need to encode ELT, since scmp compares unibyte
		       strings only.  */
		    elt = ENCODE_FILE (elt);
		    skip = len - SCHARS (elt);
		    if (skip < 0) continue;

		    if (0 <= scmp (dp->d_name + skip,
				   SDATA (elt),
				   SCHARS (elt)))
		      continue;
		    break;
		  }
	    }

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

	  if (!passcount)
	    {
	      Lisp_Object regexps;
	      Lisp_Object zero;
	      XSETFASTINT (zero, 0);

	      /* Ignore this element if it fails to match all the regexps.  */
	      for (regexps = Vcompletion_regexp_list; CONSP (regexps);
		   regexps = XCDR (regexps))
		{
		  tem = Fstring_match (XCAR (regexps),
				       make_string (dp->d_name, len), zero);
		  if (NILP (tem))
		    break;
		}
	      if (CONSP (regexps))
		continue;
	    }

	  /* This is a possible completion */
	  if (directoryp)
	    {
	      /* 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);

	  /* Test the predicate, if any.  */

	  if (!NILP (predicate))
	    {
	      Lisp_Object decoded;
	      Lisp_Object val;
	      struct gcpro gcpro1;

	      GCPRO1 (name);
	      decoded = Fexpand_file_name (DECODE_FILE (name), dirname);
	      val = call1 (predicate, decoded);
	      UNGCPRO;

	      if (NILP (val))
		continue;
	    }

	  /* Suitably record this match.  */

	  matchcount++;

	  if (all_flag)
	    {
	      name = DECODE_FILE (name);
	      bestmatch = Fcons (name, bestmatch);
	    }
	  else if (NILP (bestmatch))
	    {
	      bestmatch = name;
	      bestmatchsize = SCHARS (name);
	    }
	  else
	    {
	      compare = min (bestmatchsize, len);
	      p1 = SDATA (bestmatch);
	      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.  */
		  /* This tests that the current file is an exact match
		     but BESTMATCH is not (it is too long).  */
		  if ((matchsize == len
		       && matchsize + !!directoryp
			  < SCHARS (bestmatch))
		      ||
		      /* If there is no exact match ignoring case,
			 prefer a match that does not change the case
			 of the input.  */
		      /* 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.  */
		      (((matchsize == len)
			==
			(matchsize + !!directoryp
			 == SCHARS (bestmatch)))
		       && !bcmp (p2, SDATA (encoded_file), SCHARS (encoded_file))
		       && bcmp (p1, SDATA (encoded_file), SCHARS (encoded_file))))
		    bestmatch = name;
		}

	      /* If this dirname all matches, see if implicit following
		 slash does too.  */
	      if (directoryp
		  && compare == matchsize
		  && bestmatchsize > matchsize
		  && IS_ANY_SEP (p1[matchsize]))
		matchsize++;
	      bestmatchsize = matchsize;
	    }
	}
      /* This closes the directory.  */
      bestmatch = unbind_to (inner_count, bestmatch);
    }

  UNGCPRO;
  bestmatch = unbind_to (count, bestmatch);

  if (all_flag || NILP (bestmatch))
    {
      if (STRINGP (bestmatch))
	bestmatch = DECODE_FILE (bestmatch);
      return bestmatch;
    }
  if (matchcount == 1 && bestmatchsize == SCHARS (file))
    return Qt;
  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.  */
  bestmatch = DECODE_FILE (bestmatch);
  return bestmatch;
}

/* Compare exactly LEN chars of strings at S1 and S2,
   ignoring case if appropriate.
   Return -1 if strings match,
   else number of chars that match at the beginning.  */

static int
scmp (s1, s2, len)
     register unsigned char *s1, *s2;
     int len;
{
  register int l = len;

  if (completion_ignore_case)
    {
      while (l && DOWNCASE (*s1++) == DOWNCASE (*s2++))
	l--;
    }
  else
    {
      while (l && *s1++ == *s2++)
	l--;
    }
  if (l == 0)
    return -1;
  else
    return len - l;
}

static int
file_name_completion_stat (dirname, dp, st_addr)
     Lisp_Object dirname;
     DIRENTRY *dp;
     struct stat *st_addr;
{
  int len = NAMLEN (dp);
  int pos = SCHARS (dirname);
  int value;
  char *fullname = (char *) alloca (len + pos + 2);

#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 */

  bcopy (SDATA (dirname), fullname, pos);
#ifndef VMS
  if (!IS_DIRECTORY_SEP (fullname[pos - 1]))
    fullname[pos++] = DIRECTORY_SEP;
#endif

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

#ifdef S_IFLNK
  /* 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;
#else
  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 */
}

#ifdef VMS

DEFUN ("file-name-all-versions", Ffile_name_all_versions,
       Sfile_name_all_versions, 2, 2, 0,
       doc: /* Return a list of all versions of file name FILE in directory DIRECTORY.  */)
     (file, directory)
     Lisp_Object file, directory;
{
  return file_name_completion (file, directory, 1, 1, Qnil);
}

DEFUN ("file-version-limit", Ffile_version_limit, Sfile_version_limit, 1, 1, 0,
       doc: /* Return the maximum number of versions allowed for FILE.
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$l_fna = SDATA (filename);
  fab.fab$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 */

Lisp_Object
make_time (time)
     time_t time;
{
  return Fcons (make_number (time >> 16),
		Fcons (make_number (time & 0177777), Qnil));
}

DEFUN ("file-attributes", Ffile_attributes, Sfile_attributes, 1, 2, 0,
       doc: /* Return a list of attributes of file FILENAME.
Value is nil if specified file cannot be opened.

ID-FORMAT specifies the preferred format of attributes uid and gid (see
below) - valid values are 'string and 'integer. The latter is the default,
but we plan to change that, so you should specify a non-nil value for
ID-FORMAT if you use the returned uid or gid.

Elements of the attribute list are:
 0. t for directory, string (name linked to) for symbolic link, or nil.
 1. Number of links to file.
 2. File uid as a string or an integer.  If a string value cannot be
  looked up, the integer value is returned.
 3. File gid, likewise.
 4. Last access time, as a list of two integers.
  First integer has high-order 16 bits of time, second has low 16 bits.
 5. Last modification time, likewise.
 6. Last status change time, likewise.
 7. Size in bytes.
  This is a floating point number if the size is too large for an integer.
 8. File modes, as a string of ten letters or dashes as in ls -l.
 9. t if file's gid would change if file were deleted and recreated.
10. inode number.  If inode number is larger than the Emacs integer,
  this is a cons cell containing two integers: first the high part,
  then the low 16 bits.
11. Device number.  If it is larger than the Emacs integer, this is
  a cons cell, similar to the inode number.  */)
     (filename, id_format)
     Lisp_Object filename, id_format;
{
  Lisp_Object values[12];
  Lisp_Object encoded;
  struct stat s;
  struct passwd *pw;
  struct group *gr;
#if defined (BSD4_2) || defined (BSD4_3)
  Lisp_Object dirname;
  struct stat sdir;
#endif
  char modes[10];
  Lisp_Object handler;
  struct gcpro gcpro1;
  EMACS_INT uid, gid, ino;

  filename = Fexpand_file_name (filename, Qnil);

  /* If the file name has special constructs in it,
     call the corresponding file handler.  */
  handler = Ffind_file_name_handler (filename, Qfile_attributes);
  if (!NILP (handler))
    { /* Only pass the extra arg if it is used to help backward compatibility
	 with old file handlers which do not implement the new arg.  --Stef  */
      if (NILP (id_format))
	return call2 (handler, Qfile_attributes, filename);
      else
	return call3 (handler, Qfile_attributes, filename, id_format);
    }

  GCPRO1 (filename);
  encoded = ENCODE_FILE (filename);
  UNGCPRO;

  if (lstat (SDATA (encoded), &s) < 0)
    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);
  /* When make_fixnum_or_float is called below with types that are
     shorter than an int (e.g., `short'), GCC whines about comparison
     being always false due to limited range of data type.  Fix by
     copying s.st_uid and s.st_gid into int variables.  */
  uid = s.st_uid;
  gid = s.st_gid;
  if (NILP (id_format) || EQ (id_format, Qinteger))
    {
      values[2] = make_fixnum_or_float (uid);
      values[3] = make_fixnum_or_float (gid);
    }
  else
    {
      BLOCK_INPUT;
      pw = (struct passwd *) getpwuid (uid);
      values[2] = (pw ? build_string (pw->pw_name)
                  : make_fixnum_or_float (uid));
      gr = (struct group *) getgrgid (gid);
      values[3] = (gr ? build_string (gr->gr_name)
                  : make_fixnum_or_float (gid));
      UNBLOCK_INPUT;
    }
  values[4] = make_time (s.st_atime);
  values[5] = make_time (s.st_mtime);
  values[6] = make_time (s.st_ctime);
  values[7] = make_number (s.st_size);
  /* If the size is out of range for an integer, return a float.  */
  if (XINT (values[7]) != s.st_size)
    values[7] = make_float ((double)s.st_size);
  /* If the size is negative, and its type is long, convert it back to
     positive.  */
  if (s.st_size < 0 && sizeof (s.st_size) == sizeof (long))
    values[7] = make_float ((double) ((unsigned long) s.st_size));

  filemodestring (&s, modes);
  values[8] = make_string (modes, 10);
#if defined (BSD4_2) || defined (BSD4_3) /* file gid will be dir gid */
  dirname = Ffile_name_directory (filename);
  if (! NILP (dirname))
    encoded = ENCODE_FILE (dirname);
  if (! NILP (dirname) && stat (SDATA (encoded), &sdir) == 0)
    values[9] = (sdir.st_gid != gid) ? Qt : Qnil;
  else					/* if we can't tell, assume worst */
    values[9] = Qt;
#else					/* file gid will be egid */
  values[9] = (gid != getegid ()) ? Qt : Qnil;
#endif	/* BSD4_2 (or BSD4_3) */
  /* Shut up GCC warnings in FIXNUM_OVERFLOW_P below.  */
  ino = s.st_ino;
  if (FIXNUM_OVERFLOW_P (ino))
    /* To allow inode numbers larger than VALBITS, separate the bottom
       16 bits.  */
    values[10] = Fcons (make_number (ino >> 16),
			make_number (ino & 0xffff));
  else
    /* But keep the most common cases as integers.  */
    values[10] = make_number (ino);

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

  return Flist (sizeof(values) / sizeof(values[0]), values);
}

DEFUN ("file-attributes-lessp", Ffile_attributes_lessp, Sfile_attributes_lessp, 2, 2, 0,
       doc: /* Return t if first arg file attributes list is less than second.
Comparison is in lexicographic order and case is significant.  */)
     (f1, f2)
     Lisp_Object f1, f2;
{
  return Fstring_lessp (Fcar (f1), Fcar (f2));
}

void
syms_of_dired ()
{
  Qdirectory_files = intern ("directory-files");
  Qdirectory_files_and_attributes = intern ("directory-files-and-attributes");
  Qfile_name_completion = intern ("file-name-completion");
  Qfile_name_all_completions = intern ("file-name-all-completions");
  Qfile_attributes = intern ("file-attributes");
  Qfile_attributes_lessp = intern ("file-attributes-lessp");

  staticpro (&Qdirectory_files);
  staticpro (&Qdirectory_files_and_attributes);
  staticpro (&Qfile_name_completion);
  staticpro (&Qfile_name_all_completions);
  staticpro (&Qfile_attributes);
  staticpro (&Qfile_attributes_lessp);

  defsubr (&Sdirectory_files);
  defsubr (&Sdirectory_files_and_attributes);
  defsubr (&Sfile_name_completion);
#ifdef VMS
  defsubr (&Sfile_name_all_versions);
  defsubr (&Sfile_version_limit);
#endif /* VMS */
  defsubr (&Sfile_name_all_completions);
  defsubr (&Sfile_attributes);
  defsubr (&Sfile_attributes_lessp);

  DEFVAR_LISP ("completion-ignored-extensions", &Vcompletion_ignored_extensions,
	       doc: /* Completion ignores file names ending in any string in this list.
It does not ignore them if all possible completions end in one of
these strings or when displaying a list of completions.
It ignores directory names if they match any string in this list which
ends in a slash.  */);
  Vcompletion_ignored_extensions = Qnil;
}

/* arch-tag: 1ac8deca-4d8f-4d41-ade9-089154d98c03
   (do not change this comment) */