summaryrefslogtreecommitdiff
path: root/locale/programs/locale.c
blob: c51c0a14faa1bd6c00d6b14dacb72cc27ba0a4a2 (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
/* Implementation of the locale program according to POSIX 9945-2.
   Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.

   The GNU C Library 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

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

#include <argp.h>
#include <argz.h>
#include <dirent.h>
#include <errno.h>
#include <error.h>
#include <langinfo.h>
#include <libintl.h>
#include <limits.h>
#include <locale.h>
#include <search.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>

#include "localeinfo.h"


/* If set print the name of the category.  */
static int show_category_name;

/* If set print the name of the item.  */
static int show_keyword_name;

/* Print names of all available locales.  */
static int do_all;

/* Print names of all available character maps.  */
static int do_charmaps = 0;

/* Name and version of program.  */
static void print_version (FILE *stream, struct argp_state *state);
void (*argp_program_version_hook) (FILE *, struct argp_state *) = print_version;

/* Definitions of arguments for argp functions.  */
static const struct argp_option options[] =
{
  { NULL, 0, NULL, 0, N_("System information:") },
  { "all-locales", 'a', NULL, OPTION_NO_USAGE,
    N_("Write names of available locales") },
  { "charmaps", 'm', NULL, OPTION_NO_USAGE,
    N_("Write names of available charmaps") },
  { NULL, 0, NULL, 0, N_("Modify output format:") },
  { "category-name", 'c', NULL, 0, N_("Write names of selected categories") },
  { "keyword-name", 'k', NULL, 0, N_("Write names of selected keywords") },
  { NULL, 0, NULL, 0, NULL }
};

/* Short description of program.  */
static const char doc[] = N_("Get locale-specific information.");

/* Strings for arguments in help texts.  */
static const char args_doc[] = N_("NAME\n[-a|-m]");

/* Prototype for option handler.  */
static error_t parse_opt (int key, char *arg, struct argp_state *state);

/* Function to print some extra text in the help message.  */
static char *more_help (int key, const char *text, void *input);

/* Data structure to communicate with argp functions.  */
static struct argp argp =
{
  options, parse_opt, args_doc, doc, NULL, more_help
};


/* We don't have these constants defined because we don't use them.  Give
   default values.  */
#define CTYPE_MB_CUR_MIN 0
#define CTYPE_MB_CUR_MAX 0
#define CTYPE_HASH_SIZE 0
#define CTYPE_HASH_LAYERS 0
#define CTYPE_CLASS 0
#define CTYPE_TOUPPER_EB 0
#define CTYPE_TOLOWER_EB 0
#define CTYPE_TOUPPER_EL 0
#define CTYPE_TOLOWER_EL 0

/* Definition of the data structure which represents a category and its
   items.  */
struct category
{
  int cat_id;
  const char *name;
  size_t number;
  struct cat_item
  {
    int item_id;
    const char *name;
    enum { std, opt } status;
    enum value_type value_type;
    int min;
    int max;
  } *item_desc;
};

/* Simple helper macro.  */
#define NELEMS(arr) ((sizeof (arr)) / (sizeof (arr[0])))

/* For some tricky stuff.  */
#define NO_PAREN(Item, More...) Item, ## More

/* We have all categories defined in `categories.def'.  Now construct
   the description and data structure used for all categories.  */
#define DEFINE_ELEMENT(Item, More...) { Item, ## More },
#define DEFINE_CATEGORY(category, name, items, postload, in, check, out)      \
    static struct cat_item category##_desc[] =				      \
      {									      \
        NO_PAREN items							      \
      };

#include "categories.def"
#undef DEFINE_CATEGORY

static struct category category[] =
  {
#define DEFINE_CATEGORY(category, name, items, postload, in, check, out)      \
    [category] = { _NL_NUM_##category, name, NELEMS (category##_desc),	      \
		   category##_desc },
#include "categories.def"
#undef DEFINE_CATEGORY
  };
#define NCATEGORIES NELEMS (category)


/* Automatically set variable.  */
extern const char *__progname;

/* helper function for extended name handling.  */
extern void locale_special (const char *name, int show_category_name,
			    int show_keyword_name);

/* Prototypes for local functions.  */
static void write_locales (void);
static void write_charmaps (void);
static void show_locale_vars (void);
static void show_info (const char *name);


int
main (int argc, char *argv[])
{
  int remaining;

  /* Set initial values for global variables.  */
  show_category_name = 0;
  show_keyword_name = 0;

  /* Set locale.  Do not set LC_ALL because the other categories must
     not be affected (according to POSIX.2).  */
  setlocale (LC_CTYPE, "");
  setlocale (LC_MESSAGES, "");

  /* Initialize the message catalog.  */
  textdomain (PACKAGE);

  /* Parse and process arguments.  */
  argp_parse (&argp, argc, argv, 0, &remaining, NULL);

  /* `-a' requests the names of all available locales.  */
  if (do_all != 0)
    {
      setlocale (LC_COLLATE, "");
      write_locales ();
      exit (EXIT_SUCCESS);
    }

  /* `m' requests the names of all available charmaps.  The names can be
     used for the -f argument to localedef(1).  */
  if (do_charmaps != 0)
    {
      write_charmaps ();
      exit (EXIT_SUCCESS);
    }

  /* Specific information about the current locale are requested.
     Change to this locale now.  */
  setlocale (LC_ALL, "");

  /* If no real argument is given we have to print the contents of the
     current locale definition variables.  These are LANG and the LC_*.  */
  if (remaining == argc && show_keyword_name == 0 && show_category_name == 0)
    {
      show_locale_vars ();
      exit (EXIT_SUCCESS);
    }

  /* Process all given names.  */
  while (remaining <  argc)
    show_info (argv[remaining++]);

  exit (EXIT_SUCCESS);
}


/* Handle program arguments.  */
static error_t
parse_opt (int key, char *arg, struct argp_state *state)
{
  switch (key)
    {
    case 'a':
      do_all = 1;
      break;
    case 'c':
      show_category_name = 1;
      break;
    case 'm':
      do_charmaps = 1;
      break;
    case 'k':
      show_keyword_name = 1;
      break;
    default:
      return ARGP_ERR_UNKNOWN;
    }
  return 0;
}


static char *
more_help (int key, const char *text, void *input)
{
  switch (key)
    {
    case ARGP_KEY_HELP_EXTRA:
      /* We print some extra information.  */
      return strdup (gettext ("\
Report bugs using the `glibcbug' script to <bugs@gnu.org>.\n"));
    default:
      break;
    }
  return (char *) text;
}

/* Print the version information.  */
static void
print_version (FILE *stream, struct argp_state *state)
{
  fprintf (stream, "locale (GNU %s) %s\n", PACKAGE, VERSION);
  fprintf (stream, gettext ("\
Copyright (C) %s Free Software Foundation, Inc.\n\
This is free software; see the source for copying conditions.  There is NO\n\
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
"), "1995, 1996, 1997, 1998");
  fprintf (stream, gettext ("Written by %s.\n"), "Ulrich Drepper");
}


/* Simple action function which prints arguments as strings.  */
static void
print_names (const void *nodep, VISIT value, int level)
{
  if (value == postorder || value == leaf)
    puts (*(char **) nodep);
}


/* Write the names of all available locales to stdout.  We have some
   sources of the information: the contents of the locale directory
   and the locale.alias file.  To avoid duplicates and print the
   result is a reasonable order we put all entries is a search tree
   and print them afterwards.  */
static void
write_locales (void)
{
  void *all_data = NULL;
  DIR *dir;
  struct dirent *dirent;
  char *alias_path;
  size_t alias_path_len;
  char *entry;

#define PUT(name) tsearch ((name), &all_data, \
			   (int (*) (const void *, const void *)) strcoll)

  dir = opendir (LOCALEDIR);
  if (dir == NULL)
    {
      error (1, errno, gettext ("cannot read locale directory `%s'"),
	     LOCALEDIR);
      return;
    }

  /* `POSIX' locale is always available (POSIX.2 4.34.3).  */
  PUT ("POSIX");
  /* And so is the "C" locale.  */
  PUT ("C");

  /* Now we can look for all files in the directory.  */
  while ((dirent = readdir (dir)) != NULL)
    if (strcmp (dirent->d_name, ".") != 0
	&& strcmp (dirent->d_name, "..") != 0)
      {
	mode_t mode;
#ifdef _DIRENT_HAVE_D_TYPE
	if (dirent->d_type != DT_UNKNOWN)
	  mode = DTTOIF (dirent->d_type);
	else
#endif
	  {
	    struct stat st;
	    char buf[sizeof (LOCALEDIR) + strlen (dirent->d_name) + 1];

	    stpcpy (stpcpy (stpcpy (buf, LOCALEDIR), "/"), dirent->d_name);

	    if (stat (buf, &st) < 0)
	      continue;
	    mode = st.st_mode;
	  }

	if (S_ISDIR (mode))
	  PUT (strdup (dirent->d_name));
      }

  closedir (dir);

  /* Now read the locale.alias files.  */
  if (argz_create_sep (LOCALE_ALIAS_PATH, ':', &alias_path, &alias_path_len))
    error (1, errno, gettext ("while preparing output"));

  entry = NULL;
  while ((entry = argz_next (alias_path, alias_path_len, entry)))
    {
      static const char aliasfile[] = "/locale.alias";
      FILE *fp;
      char full_name[strlen (entry) + sizeof aliasfile];

      stpcpy (stpcpy (full_name, entry), aliasfile);
      fp = fopen (full_name, "r");
      if (fp == NULL)
	/* Ignore non-existing files.  */
	continue;

      while (! feof (fp))
	{
	  /* It is a reasonable approach to use a fix buffer here
	     because
	     a) we are only interested in the first two fields
	     b) these fields must be usable as file names and so must
	        not be that long  */
	  char buf[BUFSIZ];
	  char *alias;
	  char *value;
	  char *cp;

	  if (fgets (buf, BUFSIZ, fp) == NULL)
	    /* EOF reached.  */
	    break;

	  cp = buf;
	  /* Ignore leading white space.  */
	  while (isspace (cp[0]))
	    ++cp;

	  /* A leading '#' signals a comment line.  */
	  if (cp[0] != '\0' && cp[0] != '#')
	    {
	      alias = cp++;
	      while (cp[0] != '\0' && !isspace (cp[0]))
		++cp;
	      /* Terminate alias name.  */
	      if (cp[0] != '\0')
		*cp++ = '\0';

	      /* Now look for the beginning of the value.  */
	      while (isspace (cp[0]))
		++cp;

	      if (cp[0] != '\0')
		{
		  value = cp++;
		  while (cp[0] != '\0' && !isspace (cp[0]))
		    ++cp;
		  /* Terminate value.  */
		  if (cp[0] == '\n')
		    {
		      /* This has to be done to make the following
			 test for the end of line possible.  We are
			 looking for the terminating '\n' which do not
			 overwrite here.  */
		      *cp++ = '\0';
		      *cp = '\n';
		    }
		  else if (cp[0] != '\0')
		    *cp++ = '\0';

		  /* Add the alias.  */
		  PUT (strdup (alias));
		}
	    }

	  /* Possibly not the whole line fits into the buffer.
	     Ignore the rest of the line.  */
	  while (strchr (cp, '\n') == NULL)
	    {
	      cp = buf;
	      if (fgets (buf, BUFSIZ, fp) == NULL)
		/* Make sure the inner loop will be left.  The outer
		   loop will exit at the `feof' test.  */
		*cp = '\n';
	    }
	}

      fclose (fp);
    }

  twalk (all_data, print_names);
}


/* Write the names of all available character maps to stdout.  */
static void
write_charmaps (void)
{
  void *all_data = NULL;
  DIR *dir;
  struct dirent *dirent;

  dir = opendir (CHARMAP_PATH);
  if (dir == NULL)
    {
      error (1, errno, gettext ("cannot read character map directory `%s'"),
	     CHARMAP_PATH);
      return;
    }

  /* Now we can look for all files in the directory.  */
  while ((dirent = readdir (dir)) != NULL)
    if (strcmp (dirent->d_name, ".") != 0
	&& strcmp (dirent->d_name, "..") != 0)
      {
	char *buf = NULL;
	mode_t mode;

#ifdef _DIRENT_HAVE_D_TYPE
	if (dirent->d_type != DT_UNKNOWN)
	  mode = DTTOIF (dirent->d_type);
	else
#endif
	  {
	    struct stat st;

	    buf = alloca (sizeof (CHARMAP_PATH) + strlen (dirent->d_name) + 1);

	    stpcpy (stpcpy (stpcpy (buf, CHARMAP_PATH), "/"), dirent->d_name);

	    if (stat (buf, &st) < 0)
	      continue;
	    mode = st.st_mode;
	  }

	if (S_ISREG (mode))
	  {
	    FILE *fp;

	    PUT (strdup (dirent->d_name));

	    /* Read the file and learn about the code set name.  */
	    if (buf == NULL)
	      {
		buf = alloca (sizeof (CHARMAP_PATH)
			      + strlen (dirent->d_name) + 1);

		stpcpy (stpcpy (stpcpy (buf, CHARMAP_PATH), "/"),
			dirent->d_name);
	      }

	    fp = fopen (buf, "r");
	    if (fp != NULL)
	      {
		char *name = NULL;

		while (!feof (fp))
		  {
		    char junk[BUFSIZ];

		    if (fscanf (fp, " <code_set_name> %as", &name) == 1)
		      break;

		    while (fgets (junk, sizeof junk, fp) != NULL
			   && strchr (junk, '\n') == NULL)
		      continue;
		  }

		fclose (fp);

		if (name != NULL)
		  PUT (name);
	      }
	  }
      }

  closedir (dir);

  twalk (all_data, print_names);
}


/* We have to show the contents of the environments determining the
   locale.  */
static void
show_locale_vars (void)
{
  size_t cat_no;
  const char *lcall = getenv ("LC_ALL");
  const char *lang = getenv ("LANG") ? : "POSIX";

  void get_source (const char *name)
    {
      char *val = getenv (name);

      if ((lcall ?: "")[0] != '\0' || val == NULL)
	printf ("%s=\"%s\"\n", name, (lcall ?: "")[0] ? lcall : lang);
      else
	printf ("%s=%s\n", name, val);
    }

  /* LANG has to be the first value.  */
  printf ("LANG=%s\n", lang);

  /* Now all categories in an unspecified order.  */
  for (cat_no = 0; cat_no < NCATEGORIES; ++cat_no)
    get_source (category[cat_no].name);

  /* The last is the LC_ALL value.  */
  printf ("LC_ALL=%s\n", lcall ? : "");
}


/* Some of the "string" we print contain non-printable characters.  We
   encode them here.  */
static void
print_escaped (const char *string)
{
  const unsigned char *ch;

  ch = string;
  while ('\0' != *ch)
    {
      if (isprint (*ch))
	putchar (*ch);
      else
	printf("<0x%02x>", *ch);
      ++ch;
    }
}


/* Show the information request for NAME.  */
static void
show_info (const char *name)
{
  size_t cat_no;

  void print_item (struct cat_item *item)
    {
      if (show_keyword_name != 0)
	printf ("%s=", item->name);

      switch (item->value_type)
	{
	case string:
	  if (show_keyword_name)
	    putchar ('"');
	  print_escaped (nl_langinfo (item->item_id) ? : "");
	  if (show_keyword_name)
	    putchar ('"');
	  break;
	case stringarray:
	  {
	    int cnt;
	    const char *val;

	    if (show_keyword_name)
	      putchar ('"');

	    for (cnt = 0; cnt < item->max - 1; ++cnt)
	      {
		val = nl_langinfo (item->item_id + cnt);
		if (val != NULL)
		  print_escaped (val);
		putchar (';');
	      }

	    val = nl_langinfo (item->item_id + cnt);
	    if (val != NULL)
	      print_escaped (val);

	    if (show_keyword_name)
	      putchar ('"');
	  }
	  break;
	case stringlist:
	  {
	    int first = 1;
	    const char *val = nl_langinfo (item->item_id) ? : "";

	    while (*val != '\0')
	      {
		printf ("%s%s%s%s", first ? "" : ";",
			show_keyword_name ? "\"" : "", val,
			show_keyword_name ? "\"" : "");
		val = strchr (val, '\0') + 1;
		first = 0;
	      }
	  }
	  break;
	case byte:
	  {
	    const char *val = nl_langinfo (item->item_id);

	    if (val != NULL)
	      printf ("%d", *val == CHAR_MAX ? -1 : *val);
	  }
	  break;
	case bytearray:
	  {
	    const char *val = nl_langinfo (item->item_id);
	    int cnt = val ? strlen (val) : 0;

	    while (cnt > 1)
	      {
		printf ("%d;", *val == CHAR_MAX ? -1 : *val);
                --cnt;
		++val;
	      }

	    printf ("%d", cnt == 0 || *val == CHAR_MAX ? -1 : *val);
	  }
	  break;
	case word:
	  {
	    unsigned int val =
	      (unsigned int) (unsigned long int) nl_langinfo (item->item_id);
	    printf ("%d", val);
	  }
	  break;
	default:
	}
      putchar ('\n');
    }

  for (cat_no = 0; cat_no < NCATEGORIES; ++cat_no)
    {
      size_t item_no;

      if (strcmp (name, category[cat_no].name) == 0)
	/* Print the whole category.  */
	{
	  if (show_category_name != 0)
	    puts (category[cat_no].name);

	  for (item_no = 0; item_no < category[cat_no].number; ++item_no)
	    print_item (&category[cat_no].item_desc[item_no]);

	  return;
	}

      for (item_no = 0; item_no < category[cat_no].number; ++item_no)
	if (strcmp (name, category[cat_no].item_desc[item_no].name) == 0)
	  {
	    if (show_category_name != 0)
	      puts (category[cat_no].name);

	    print_item (&category[cat_no].item_desc[item_no]);
	    return;
	  }
    }

  /* The name is not a standard one.
     For testing and perhaps advanced use allow some more symbols.  */
  locale_special (name, show_category_name, show_keyword_name);
}