about summary refs log tree commit diff
path: root/locale/programs/locfile.c
blob: e4ba48e968579e8ba0b1db3f5013c9f2ef4aa04a (plain) (blame)
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
/* Copyright (C) 1996-2019 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <drepper@gnu.org>, 1996.

   This program 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; version 2 of the License, or
   (at your option) any later version.

   This program 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 this program; if not, see <http://www.gnu.org/licenses/>.  */

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <assert.h>
#include <wchar.h>

#include "../../crypt/md5.h"
#include "localedef.h"
#include "localeinfo.h"
#include "locfile.h"
#include "simple-hash.h"

#include "locfile-kw.h"

#define obstack_chunk_alloc xmalloc
#define obstack_chunk_free free

/* Temporary storage of the locale data before writing it to the archive.  */
static locale_data_t to_archive;


int
locfile_read (struct localedef_t *result, const struct charmap_t *charmap)
{
  const char *filename = result->name;
  const char *repertoire_name = result->repertoire_name;
  int locale_mask = result->needed & ~result->avail;
  struct linereader *ldfile;
  int not_here = ALL_LOCALES;

  /* If no repertoire name was specified use the global one.  */
  if (repertoire_name == NULL)
    repertoire_name = repertoire_global;

  /* Open the locale definition file.  */
  ldfile = lr_open (filename, locfile_hash);
  if (ldfile == NULL)
    {
      if (filename != NULL && filename[0] != '/')
	{
	  char *i18npath = getenv ("I18NPATH");
	  if (i18npath != NULL && *i18npath != '\0')
	    {
	      const size_t pathlen = strlen (i18npath);
	      char i18npathbuf[pathlen + 1];
	      char path[strlen (filename) + 1 + pathlen
			+ sizeof ("/locales/") - 1];
	      char *next;
	      i18npath = memcpy (i18npathbuf, i18npath, pathlen + 1);

	      while (ldfile == NULL
		     && (next = strsep (&i18npath, ":")) != NULL)
		{
		  stpcpy (stpcpy (stpcpy (path, next), "/locales/"), filename);

		  ldfile = lr_open (path, locfile_hash);

		  if (ldfile == NULL)
		    {
		      stpcpy (stpcpy (stpcpy (path, next), "/"), filename);

		      ldfile = lr_open (path, locfile_hash);
		    }
		}
	    }

	  /* Test in the default directory.  */
	  if (ldfile == NULL)
	    {
	      char path[strlen (filename) + 1 + sizeof (LOCSRCDIR)];

	      stpcpy (stpcpy (stpcpy (path, LOCSRCDIR), "/"), filename);
	      ldfile = lr_open (path, locfile_hash);
	    }
	}

      if (ldfile == NULL)
	return 1;
    }

    /* Parse locale definition file and store result in RESULT.  */
  while (1)
    {
      struct token *now = lr_token (ldfile, charmap, NULL, NULL, verbose);
      enum token_t nowtok = now->tok;
      struct token *arg;

      if (nowtok == tok_eof)
	break;

      if (nowtok == tok_eol)
	/* Ignore empty lines.  */
	continue;

      switch (nowtok)
	{
	case tok_escape_char:
	case tok_comment_char:
	  /* We need an argument.  */
	  arg = lr_token (ldfile, charmap, NULL, NULL, verbose);

	  if (arg->tok != tok_ident)
	    {
	      SYNTAX_ERROR (_("bad argument"));
	      continue;
	    }

	  if (arg->val.str.lenmb != 1)
	    {
	      lr_error (ldfile, _("\
argument to `%s' must be a single character"),
			nowtok == tok_escape_char
			? "escape_char" : "comment_char");

	      lr_ignore_rest (ldfile, 0);
	      continue;
	    }

	  if (nowtok == tok_escape_char)
	    ldfile->escape_char = *arg->val.str.startmb;
	  else
	    ldfile->comment_char = *arg->val.str.startmb;
	  break;

	case tok_repertoiremap:
	  /* We need an argument.  */
	  arg = lr_token (ldfile, charmap, NULL, NULL, verbose);

	  if (arg->tok != tok_ident)
	    {
	      SYNTAX_ERROR (_("bad argument"));
	      continue;
	    }

	  if (repertoire_name == NULL)
	    {
	      char *newp = alloca (arg->val.str.lenmb + 1);

	      *((char *) mempcpy (newp, arg->val.str.startmb,
				  arg->val.str.lenmb)) = '\0';
	      repertoire_name = newp;
	    }
	  break;

	case tok_lc_ctype:
	  ctype_read (ldfile, result, charmap, repertoire_name,
		      (locale_mask & CTYPE_LOCALE) == 0);
	  result->avail |= locale_mask & CTYPE_LOCALE;
	  not_here ^= CTYPE_LOCALE;
	  continue;

	case tok_lc_collate:
	  collate_read (ldfile, result, charmap, repertoire_name,
			(locale_mask & COLLATE_LOCALE) == 0);
	  result->avail |= locale_mask & COLLATE_LOCALE;
	  not_here ^= COLLATE_LOCALE;
	  continue;

	case tok_lc_monetary:
	  monetary_read (ldfile, result, charmap, repertoire_name,
			 (locale_mask & MONETARY_LOCALE) == 0);
	  result->avail |= locale_mask & MONETARY_LOCALE;
	  not_here ^= MONETARY_LOCALE;
	  continue;

	case tok_lc_numeric:
	  numeric_read (ldfile, result, charmap, repertoire_name,
			(locale_mask & NUMERIC_LOCALE) == 0);
	  result->avail |= locale_mask & NUMERIC_LOCALE;
	  not_here ^= NUMERIC_LOCALE;
	  continue;

	case tok_lc_time:
	  time_read (ldfile, result, charmap, repertoire_name,
		     (locale_mask & TIME_LOCALE) == 0);
	  result->avail |= locale_mask & TIME_LOCALE;
	  not_here ^= TIME_LOCALE;
	  continue;

	case tok_lc_messages:
	  messages_read (ldfile, result, charmap, repertoire_name,
			 (locale_mask & MESSAGES_LOCALE) == 0);
	  result->avail |= locale_mask & MESSAGES_LOCALE;
	  not_here ^= MESSAGES_LOCALE;
	  continue;

	case tok_lc_paper:
	  paper_read (ldfile, result, charmap, repertoire_name,
		      (locale_mask & PAPER_LOCALE) == 0);
	  result->avail |= locale_mask & PAPER_LOCALE;
	  not_here ^= PAPER_LOCALE;
	  continue;

	case tok_lc_name:
	  name_read (ldfile, result, charmap, repertoire_name,
		     (locale_mask & NAME_LOCALE) == 0);
	  result->avail |= locale_mask & NAME_LOCALE;
	  not_here ^= NAME_LOCALE;
	  continue;

	case tok_lc_address:
	  address_read (ldfile, result, charmap, repertoire_name,
			(locale_mask & ADDRESS_LOCALE) == 0);
	  result->avail |= locale_mask & ADDRESS_LOCALE;
	  not_here ^= ADDRESS_LOCALE;
	  continue;

	case tok_lc_telephone:
	  telephone_read (ldfile, result, charmap, repertoire_name,
			  (locale_mask & TELEPHONE_LOCALE) == 0);
	  result->avail |= locale_mask & TELEPHONE_LOCALE;
	  not_here ^= TELEPHONE_LOCALE;
	  continue;

	case tok_lc_measurement:
	  measurement_read (ldfile, result, charmap, repertoire_name,
			    (locale_mask & MEASUREMENT_LOCALE) == 0);
	  result->avail |= locale_mask & MEASUREMENT_LOCALE;
	  not_here ^= MEASUREMENT_LOCALE;
	  continue;

	case tok_lc_identification:
	  identification_read (ldfile, result, charmap, repertoire_name,
			       (locale_mask & IDENTIFICATION_LOCALE) == 0);
	  result->avail |= locale_mask & IDENTIFICATION_LOCALE;
	  not_here ^= IDENTIFICATION_LOCALE;
	  continue;

	default:
	  SYNTAX_ERROR (_("\
syntax error: not inside a locale definition section"));
	  continue;
	}

      /* The rest of the line must be empty.  */
      lr_ignore_rest (ldfile, 1);
    }

  /* We read all of the file.  */
  lr_close (ldfile);

  /* Mark the categories which are not contained in the file.  We assume
     them to be available and the default data will be used.  */
  result->avail |= not_here;

  return 0;
}


/* Semantic checking of locale specifications.  */

static void (*const check_funcs[]) (struct localedef_t *,
				    const struct charmap_t *) =
{
  [LC_CTYPE] = ctype_finish,
  [LC_COLLATE] = collate_finish,
  [LC_MESSAGES] = messages_finish,
  [LC_MONETARY] = monetary_finish,
  [LC_NUMERIC] = numeric_finish,
  [LC_TIME] = time_finish,
  [LC_PAPER] = paper_finish,
  [LC_NAME] = name_finish,
  [LC_ADDRESS] = address_finish,
  [LC_TELEPHONE] = telephone_finish,
  [LC_MEASUREMENT] = measurement_finish,
  [LC_IDENTIFICATION] = identification_finish
};

void
check_all_categories (struct localedef_t *definitions,
		      const struct charmap_t *charmap)
{
  int cnt;

  for (cnt = 0; cnt < sizeof (check_funcs) / sizeof (check_funcs[0]); ++cnt)
    if (check_funcs[cnt] != NULL)
      check_funcs[cnt] (definitions, charmap);
}


/* Writing the locale data files.  All files use the same output_path.  */

static void (*const write_funcs[]) (struct localedef_t *,
				    const struct charmap_t *, const char *) =
{
  [LC_CTYPE] = ctype_output,
  [LC_COLLATE] = collate_output,
  [LC_MESSAGES] = messages_output,
  [LC_MONETARY] = monetary_output,
  [LC_NUMERIC] = numeric_output,
  [LC_TIME] = time_output,
  [LC_PAPER] = paper_output,
  [LC_NAME] = name_output,
  [LC_ADDRESS] = address_output,
  [LC_TELEPHONE] = telephone_output,
  [LC_MEASUREMENT] = measurement_output,
  [LC_IDENTIFICATION] = identification_output
};


void
write_all_categories (struct localedef_t *definitions,
		      const struct charmap_t *charmap, const char *locname,
		      const char *output_path)
{
  int cnt;

  for (cnt = 0; cnt < sizeof (write_funcs) / sizeof (write_funcs[0]); ++cnt)
    if (write_funcs[cnt] != NULL)
      write_funcs[cnt] (definitions, charmap, output_path);

  if (! no_archive)
    {
      /* The data has to be added to the archive.  Do this now.  */
      struct locarhandle ah;

      /* Open the archive.  This call never returns if we cannot
	 successfully open the archive.  */
      ah.fname = NULL;
      open_archive (&ah, false);

      if (add_locale_to_archive (&ah, locname, to_archive, true) != 0)
	error (EXIT_FAILURE, errno, _("cannot add to locale archive"));

      /* We are done.  */
      close_archive (&ah);
    }
}


/* Return a NULL terminated list of the directories next to output_path
   that have the same owner, group, permissions and device as output_path.  */
static const char **
siblings_uncached (const char *output_path)
{
  size_t len;
  char *base, *p;
  struct stat64 output_stat;
  DIR *dirp;
  int nelems;
  const char **elems;

  /* Remove trailing slashes and trailing pathname component.  */
  len = strlen (output_path);
  base = (char *) alloca (len);
  memcpy (base, output_path, len);
  p = base + len;
  while (p > base && p[-1] == '/')
    p--;
  if (p == base)
    return NULL;
  do
    p--;
  while (p > base && p[-1] != '/');
  if (p == base)
    return NULL;
  *--p = '\0';
  len = p - base;

  /* Get the properties of output_path.  */
  if (lstat64 (output_path, &output_stat) < 0 || !S_ISDIR (output_stat.st_mode))
    return NULL;

  /* Iterate through the directories in base directory.  */
  dirp = opendir (base);
  if (dirp == NULL)
    return NULL;
  nelems = 0;
  elems = NULL;
  for (;;)
    {
      struct dirent64 *other_dentry;
      const char *other_name;
      char *other_path;
      struct stat64 other_stat;

      other_dentry = readdir64 (dirp);
      if (other_dentry == NULL)
	break;

      other_name = other_dentry->d_name;
      if (strcmp (other_name, ".") == 0 || strcmp (other_name, "..") == 0)
	continue;

      other_path = (char *) xmalloc (len + 1 + strlen (other_name) + 2);
      memcpy (other_path, base, len);
      other_path[len] = '/';
      strcpy (other_path + len + 1, other_name);

      if (lstat64 (other_path, &other_stat) >= 0
	  && S_ISDIR (other_stat.st_mode)
	  && other_stat.st_uid == output_stat.st_uid
	  && other_stat.st_gid == output_stat.st_gid
	  && other_stat.st_mode == output_stat.st_mode
	  && other_stat.st_dev == output_stat.st_dev)
	{
	  /* Found a subdirectory.  Add a trailing slash and store it.  */
	  p = other_path + len + 1 + strlen (other_name);
	  *p++ = '/';
	  *p = '\0';
	  elems = (const char **) xrealloc ((char *) elems,
					    (nelems + 2) * sizeof (char **));
	  elems[nelems++] = other_path;
	}
      else
	free (other_path);
    }
  closedir (dirp);

  if (elems != NULL)
    elems[nelems] = NULL;
  return elems;
}


/* Return a NULL terminated list of the directories next to output_path
   that have the same owner, group, permissions and device as output_path.
   Cache the result for future calls.  */
static const char **
siblings (const char *output_path)
{
  static const char *last_output_path;
  static const char **last_result;

  if (output_path != last_output_path)
    {
      if (last_result != NULL)
	{
	  const char **p;

	  for (p = last_result; *p != NULL; p++)
	    free ((char *) *p);
	  free (last_result);
	}

      last_output_path = output_path;
      last_result = siblings_uncached (output_path);
    }
  return last_result;
}


/* Read as many bytes from a file descriptor as possible.  */
static ssize_t
full_read (int fd, void *bufarea, size_t nbyte)
{
  char *buf = (char *) bufarea;

  while (nbyte > 0)
    {
      ssize_t retval = read (fd, buf, nbyte);

      if (retval == 0)
	break;
      else if (retval > 0)
	{
	  buf += retval;
	  nbyte -= retval;
	}
      else if (errno != EINTR)
	return retval;
    }
  return buf - (char *) bufarea;
}


/* Compare the contents of two regular files of the same size.  Return 0
   if they are equal, 1 if they are different, or -1 if an error occurs.  */
static int
compare_files (const char *filename1, const char *filename2, size_t size,
	       size_t blocksize)
{
  int fd1, fd2;
  int ret = -1;

  fd1 = open (filename1, O_RDONLY);
  if (fd1 >= 0)
    {
      fd2 = open (filename2, O_RDONLY);
      if (fd2 >= 0)
	{
	  char *buf1 = (char *) xmalloc (2 * blocksize);
	  char *buf2 = buf1 + blocksize;

	  ret = 0;
	  while (size > 0)
	    {
	      size_t bytes = (size < blocksize ? size : blocksize);

	      if (full_read (fd1, buf1, bytes) < (ssize_t) bytes)
		{
		  ret = -1;
		  break;
		}
	      if (full_read (fd2, buf2, bytes) < (ssize_t) bytes)
		{
		  ret = -1;
		  break;
		}
	      if (memcmp (buf1, buf2, bytes) != 0)
		{
		  ret = 1;
		  break;
		}
	      size -= bytes;
	    }

	  free (buf1);
	  close (fd2);
	}
      close (fd1);
    }
  return ret;
}

/* True if the locale files use the opposite endianness to the
   machine running localedef.  */
bool swap_endianness_p;

/* When called outside a start_locale_structure/end_locale_structure
   or start_locale_prelude/end_locale_prelude block, record that the
   next byte in FILE's obstack will be the first byte of a new element.
   Do likewise for the first call inside a start_locale_structure/
   end_locale_structure block.  */
static void
record_offset (struct locale_file *file)
{
  if (file->structure_stage < 2)
    {
      assert (file->next_element < file->n_elements);
      file->offsets[file->next_element++]
	= (obstack_object_size (&file->data)
	   + (file->n_elements + 2) * sizeof (uint32_t));
      if (file->structure_stage == 1)
	file->structure_stage = 2;
    }
}

/* Initialize FILE for a new output file.  N_ELEMENTS is the number
   of elements in the file.  */
void
init_locale_data (struct locale_file *file, size_t n_elements)
{
  file->n_elements = n_elements;
  file->next_element = 0;
  file->offsets = xmalloc (sizeof (uint32_t) * n_elements);
  obstack_init (&file->data);
  file->structure_stage = 0;
}

/* Align the size of FILE's obstack object to BOUNDARY bytes.  */
void
align_locale_data (struct locale_file *file, size_t boundary)
{
  size_t size = -obstack_object_size (&file->data) & (boundary - 1);
  obstack_blank (&file->data, size);
  memset (obstack_next_free (&file->data) - size, 0, size);
}

/* Record that FILE's next element contains no data.  */
void
add_locale_empty (struct locale_file *file)
{
  record_offset (file);
}

/* Record that FILE's next element consists of SIZE bytes starting at DATA.  */
void
add_locale_raw_data (struct locale_file *file, const void *data, size_t size)
{
  record_offset (file);
  obstack_grow (&file->data, data, size);
}

/* Finish the current object on OBSTACK and use it as the data for FILE's
   next element.  */
void
add_locale_raw_obstack (struct locale_file *file, struct obstack *obstack)
{
  size_t size = obstack_object_size (obstack);
  record_offset (file);
  obstack_grow (&file->data, obstack_finish (obstack), size);
}

/* Use STRING as FILE's next element.  */
void
add_locale_string (struct locale_file *file, const char *string)
{
  record_offset (file);
  obstack_grow (&file->data, string, strlen (string) + 1);
}

/* Likewise for wide strings.  */
void
add_locale_wstring (struct locale_file *file, const uint32_t *string)
{
  add_locale_uint32_array (file, string, wcslen ((const wchar_t *) string) + 1);
}

/* Record that FILE's next element is the 32-bit integer VALUE.  */
void
add_locale_uint32 (struct locale_file *file, uint32_t value)
{
  align_locale_data (file, LOCFILE_ALIGN);
  record_offset (file);
  value = maybe_swap_uint32 (value);
  obstack_grow (&file->data, &value, sizeof (value));
}

/* Record that FILE's next element is an array of N_ELEMS integers
   starting at DATA.  */
void
add_locale_uint32_array (struct locale_file *file,
			 const uint32_t *data, size_t n_elems)
{
  align_locale_data (file, LOCFILE_ALIGN);
  record_offset (file);
  obstack_grow (&file->data, data, n_elems * sizeof (uint32_t));
  maybe_swap_uint32_obstack (&file->data, n_elems);
}

/* Record that FILE's next element is the single byte given by VALUE.  */
void
add_locale_char (struct locale_file *file, char value)
{
  record_offset (file);
  obstack_1grow (&file->data, value);
}

/* Start building an element that contains several different pieces of data.
   Subsequent calls to add_locale_* will add data to the same element up
   till the next call to end_locale_structure.  The element's alignment
   is dictated by the first piece of data added to it.  */
void
start_locale_structure (struct locale_file *file)
{
  assert (file->structure_stage == 0);
  file->structure_stage = 1;
}

/* Finish a structure element that was started by start_locale_structure.
   Empty structures are OK and behave like add_locale_empty.  */
void
end_locale_structure (struct locale_file *file)
{
  record_offset (file);
  assert (file->structure_stage == 2);
  file->structure_stage = 0;
}

/* Start building data that goes before the next element's recorded offset.
   Subsequent calls to add_locale_* will add data to the file without
   treating any of it as the start of a new element.  Calling
   end_locale_prelude switches back to the usual behavior.  */
void
start_locale_prelude (struct locale_file *file)
{
  assert (file->structure_stage == 0);
  file->structure_stage = 3;
}

/* End a block started by start_locale_prelude.  */
void
end_locale_prelude (struct locale_file *file)
{
  assert (file->structure_stage == 3);
  file->structure_stage = 0;
}

/* Write a locale file, with contents given by FILE.  */
void
write_locale_data (const char *output_path, int catidx, const char *category,
		   struct locale_file *file)
{
  size_t cnt, step, maxiov;
  int fd;
  char *fname;
  const char **other_paths = NULL;
  uint32_t header[2];
  size_t n_elem;
  struct iovec vec[3];

  assert (file->n_elements == file->next_element);
  header[0] = LIMAGIC (catidx);
  header[1] = file->n_elements;
  vec[0].iov_len = sizeof (header);
  vec[0].iov_base = header;
  vec[1].iov_len = sizeof (uint32_t) * file->n_elements;
  vec[1].iov_base = file->offsets;
  vec[2].iov_len = obstack_object_size (&file->data);
  vec[2].iov_base = obstack_finish (&file->data);
  maybe_swap_uint32_array (vec[0].iov_base, 2);
  maybe_swap_uint32_array (vec[1].iov_base, file->n_elements);
  n_elem = 3;
  if (! no_archive)
    {
      /* The data will be added to the archive.  For now we simply
	 generate the image which will be written.  First determine
	 the size.  */
      int cnt;
      void *endp;

      to_archive[catidx].size = 0;
      for (cnt = 0; cnt < n_elem; ++cnt)
	to_archive[catidx].size += vec[cnt].iov_len;

      /* Allocate the memory for it.  */
      to_archive[catidx].addr = xmalloc (to_archive[catidx].size);

      /* Fill it in.  */
      for (cnt = 0, endp = to_archive[catidx].addr; cnt < n_elem; ++cnt)
	endp = mempcpy (endp, vec[cnt].iov_base, vec[cnt].iov_len);

      /* Compute the MD5 sum for the data.  */
      __md5_buffer (to_archive[catidx].addr, to_archive[catidx].size,
		    to_archive[catidx].sum);

      return;
    }

  fname = xmalloc (strlen (output_path) + 2 * strlen (category) + 7);

  /* Normally we write to the directory pointed to by the OUTPUT_PATH.
     But for LC_MESSAGES we have to take care for the translation
     data.  This means we need to have a directory LC_MESSAGES in
     which we place the file under the name SYS_LC_MESSAGES.  */
  sprintf (fname, "%s%s", output_path, category);
  fd = -2;
  if (strcmp (category, "LC_MESSAGES") == 0)
    {
      struct stat64 st;

      if (stat64 (fname, &st) < 0)
	{
	  if (mkdir (fname, 0777) >= 0)
	    {
	      fd = -1;
	      errno = EISDIR;
	    }
	}
      else if (!S_ISREG (st.st_mode))
	{
	  fd = -1;
	  errno = EISDIR;
	}
    }

  /* Create the locale file with nlinks == 1; this avoids crashing processes
     which currently use the locale and damaging files belonging to other
     locales as well.  */
  if (fd == -2)
    {
      unlink (fname);
      fd = creat (fname, 0666);
    }

  if (fd == -1)
    {
      int save_err = errno;

      if (errno == EISDIR)
	{
	  sprintf (fname, "%1$s%2$s/SYS_%2$s", output_path, category);
	  unlink (fname);
	  fd = creat (fname, 0666);
	  if (fd == -1)
	    save_err = errno;
	}

      if (fd == -1)
	{
	  record_error (0, save_err, _("\
cannot open output file `%s' for category `%s'"), fname, category);
	  free (fname);
	  return;
	}
    }

#ifdef UIO_MAXIOV
  maxiov = UIO_MAXIOV;
#else
  maxiov = sysconf (_SC_UIO_MAXIOV);
#endif

  /* Write the data using writev.  But we must take care for the
     limitation of the implementation.  */
  for (cnt = 0; cnt < n_elem; cnt += step)
    {
      step = n_elem - cnt;
      if (maxiov > 0)
	step = MIN (maxiov, step);

      if (writev (fd, &vec[cnt], step) < 0)
	{
	  record_error (0, errno, _("\
failure while writing data for category `%s'"), category);
	  break;
	}
    }

  close (fd);

  /* Compare the file with the locale data files for the same category
     in other locales, and see if we can reuse it, to save disk space.
     If the user specified --no-hard-links to localedef then hard_links
     is false, other_paths remains NULL and we skip the optimization
     below.  The use of --no-hard-links is distribution specific since
     some distros have post-processing hard-link steps and so doing this
     here is a waste of time.  Worse than a waste of time in rpm-based
     distributions it can result in build determinism issues from
     build-to-build since some files may get a hard link in one pass but
     not in another (if the files happened to be created in parallel).  */
  if (hard_links)
    other_paths = siblings (output_path);

  /* If there are other paths, then walk the sibling paths looking for
     files with the same content so we can hard link and reduce disk
     space usage.  */
  if (other_paths != NULL)
    {
      struct stat64 fname_stat;

      if (lstat64 (fname, &fname_stat) >= 0
	  && S_ISREG (fname_stat.st_mode))
	{
	  const char *fname_tail = fname + strlen (output_path);
	  const char **other_p;
	  int seen_count;
	  ino_t *seen_inodes;

	  seen_count = 0;
	  for (other_p = other_paths; *other_p; other_p++)
	    seen_count++;
	  seen_inodes = (ino_t *) xmalloc (seen_count * sizeof (ino_t));
	  seen_count = 0;

	  for (other_p = other_paths; *other_p; other_p++)
	    {
	      const char *other_path = *other_p;
	      size_t other_path_len = strlen (other_path);
	      char *other_fname;
	      struct stat64 other_fname_stat;

	      other_fname =
		(char *) xmalloc (other_path_len + strlen (fname_tail) + 1);
	      memcpy (other_fname, other_path, other_path_len);
	      strcpy (other_fname + other_path_len, fname_tail);

	      if (lstat64 (other_fname, &other_fname_stat) >= 0
		  && S_ISREG (other_fname_stat.st_mode)
		  /* Consider only files on the same device.
		     Otherwise hard linking won't work anyway.  */
		  && other_fname_stat.st_dev == fname_stat.st_dev
		  /* Consider only files with the same permissions.
		     Otherwise there are security risks.  */
		  && other_fname_stat.st_uid == fname_stat.st_uid
		  && other_fname_stat.st_gid == fname_stat.st_gid
		  && other_fname_stat.st_mode == fname_stat.st_mode
		  /* Don't compare fname with itself.  */
		  && other_fname_stat.st_ino != fname_stat.st_ino
		  /* Files must have the same size, otherwise they
		     cannot be the same.  */
		  && other_fname_stat.st_size == fname_stat.st_size)
		{
		  /* Skip this file if we have already read it (under a
		     different name).  */
		  int i;

		  for (i = seen_count - 1; i >= 0; i--)
		    if (seen_inodes[i] == other_fname_stat.st_ino)
		      break;
		  if (i < 0)
		    {
		      /* Now compare fname and other_fname for real.  */
		      blksize_t blocksize;

#ifdef _STATBUF_ST_BLKSIZE
		      blocksize = MAX (fname_stat.st_blksize,
				       other_fname_stat.st_blksize);
		      if (blocksize > 8 * 1024)
			blocksize = 8 * 1024;
#else
		      blocksize = 8 * 1024;
#endif

		      if (compare_files (fname, other_fname,
					 fname_stat.st_size, blocksize) == 0)
			{
			  /* Found! other_fname is identical to fname.  */
			  /* Link other_fname to fname.  But use a temporary
			     file, in case hard links don't work on the
			     particular filesystem.  */
			  char * tmp_fname =
			    (char *) xmalloc (strlen (fname) + 4 + 1);

			  strcpy (stpcpy (tmp_fname, fname), ".tmp");

			  if (link (other_fname, tmp_fname) >= 0)
			    {
			      unlink (fname);
			      if (rename (tmp_fname, fname) < 0)
				{
				  record_error (0, errno, _("\
cannot create output file `%s' for category `%s'"), fname, category);
				}
			      free (tmp_fname);
			      free (other_fname);
			      break;
			    }
			  free (tmp_fname);
			}

		      /* Don't compare with this file a second time.  */
		      seen_inodes[seen_count++] = other_fname_stat.st_ino;
		    }
		}
	      free (other_fname);
	    }
	  free (seen_inodes);
	}
    }

  free (fname);
}


/* General handling of `copy'.  */
void
handle_copy (struct linereader *ldfile, const struct charmap_t *charmap,
	     const char *repertoire_name, struct localedef_t *result,
	     enum token_t token, int locale, const char *locale_name,
	     int ignore_content)
{
  struct token *now;
  int warned = 0;

  now = lr_token (ldfile, charmap, result, NULL, verbose);
  if (now->tok != tok_string)
    lr_error (ldfile, _("expecting string argument for `copy'"));
  else if (!ignore_content)
    {
      if (now->val.str.startmb == NULL)
	lr_error (ldfile, _("\
locale name should consist only of portable characters"));
      else
	{
	  (void) add_to_readlist (locale, now->val.str.startmb,
				  repertoire_name, 1, NULL);
	  result->copy_name[locale] = now->val.str.startmb;
	}
    }

  lr_ignore_rest (ldfile, now->tok == tok_string);

  /* The rest of the line must be empty and the next keyword must be
     `END xxx'.  */
  while ((now = lr_token (ldfile, charmap, result, NULL, verbose))->tok
	 != tok_end && now->tok != tok_eof)
    {
      if (warned == 0)
	{
	  lr_error (ldfile, _("\
no other keyword shall be specified when `copy' is used"));
	  warned = 1;
	}

      lr_ignore_rest (ldfile, 0);
    }

  if (now->tok != tok_eof)
    {
      /* Handle `END xxx'.  */
      now = lr_token (ldfile, charmap, result, NULL, verbose);

      if (now->tok != token)
	lr_error (ldfile, _("\
`%1$s' definition does not end with `END %1$s'"), locale_name);

      lr_ignore_rest (ldfile, now->tok == token);
    }
  else
    /* When we come here we reached the end of the file.  */
    lr_error (ldfile, _("%s: premature end of file"), locale_name);
}