locale/programs/locale.c

   1 /* Copyright (C) 1995, 1996 Free Software Foundation, Inc.
   2
   3 The GNU C Library is free software; you can redistribute it and/or
   4 modify it under the terms of the GNU Library General Public License as
   5 published by the Free Software Foundation; either version 2 of the
   6 License, or (at your option) any later version.
   7
   8 The GNU C Library is distributed in the hope that it will be useful,
   9 but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11 Library General Public License for more details.
  12
  13 You should have received a copy of the GNU Library General Public
  14 License along with the GNU C Library; see the file COPYING.LIB.  If
  15 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  16 Cambridge, MA 02139, USA.  */
  17
  18 #ifdef HAVE_CONFIG_H
  19 # include <config.h>
  20 #endif
  21
  22 #include <dirent.h>
  23 #include <error.h>
  24 #include <getopt.h>
  25 #include <langinfo.h>
  26 #include <libintl.h>
  27 #include <limits.h>
  28 #include <locale.h>
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <unistd.h>
  32 #include <errno.h>
  33
  34 #include "localeinfo.h"
  35
  36
  37 /* If set print the name of the category.  */
  38 static int show_category_name;
  39
  40 /* If set print the name of the item.  */
  41 static int show_keyword_name;
  42
  43 /* Long options.  */
  44 static const struct option long_options[] =
  45 {
  46   { "all-locales", no_argument, NULL, 'a' },
  47   { "category-name", no_argument, &show_category_name, 1 },
  48   { "charmaps", no_argument, NULL, 'm' },
  49   { "help", no_argument, NULL, 'h' },
  50   { "keyword-name", no_argument, &show_keyword_name, 1 },
  51   { "version", no_argument, NULL, 'v' },
  52   { NULL, 0, NULL, 0 }
  53 };
  54
  55
  56 /* We don't have these constants defined because we don't use them.  Give
  57    default values.  */
  58 #define CTYPE_MB_CUR_MIN 0
  59 #define CTYPE_MB_CUR_MAX 0
  60 #define CTYPE_HASH_SIZE 0
  61 #define CTYPE_HASH_LAYERS 0
  62 #define CTYPE_CLASS 0
  63 #define CTYPE_TOUPPER_EB 0
  64 #define CTYPE_TOLOWER_EB 0
  65 #define CTYPE_TOUPPER_EL 0
  66 #define CTYPE_TOLOWER_EL 0
  67
  68 /* Definition of the data structure which represents a category and its
  69    items.  */
  70 struct category
  71 {
  72   int cat_id;
  73   const char *name;
  74   size_t number;
  75   struct cat_item
  76   {
  77     int item_id;
  78     const char *name;
  79     enum { std, opt } status;
  80     enum value_type value_type;
  81     int min;
  82     int max;
  83   } *item_desc;
  84 };
  85
  86 /* Simple helper macro.  */
  87 #define NELEMS(arr) ((sizeof (arr)) / (sizeof (arr[0])))
  88
  89 /* For some tricky stuff.  */
  90 #define NO_PAREN(Item, More...) Item, ## More
  91
  92 /* We have all categories defined in `categories.def'.  Now construct
  93    the description and data structure used for all categories.  */
  94 #define DEFINE_ELEMENT(Item, More...) { Item, ## More },
  95 #define DEFINE_CATEGORY(category, name, items, postload, in, check, out)      \
  96     static struct cat_item category##_desc[] =                                \
  97       {                                                                       \
  98         NO_PAREN items                                                        \
  99       };
 100
 101 #include "categories.def"
 102 #undef DEFINE_CATEGORY
 103
 104 static struct category category[] =
 105   {
 106 #define DEFINE_CATEGORY(category, name, items, postload, in, check, out)      \
 107     { _NL_NUM_##category, name, NELEMS (category##_desc) - 1,                 \
 108       category##_desc },
 109 #include "categories.def"
 110 #undef DEFINE_CATEGORY
 111   };
 112 #define NCATEGORIES NELEMS (category)
 113
 114
 115 /* Prototypes for local functions.  */
 116 static void usage (int status) __attribute__ ((noreturn));
 117 static void write_locales (void);
 118 static void write_charmaps (void);
 119 static void show_locale_vars (void);
 120 static void show_info (const char *name);
 121
 122
 123 int
 124 main (int argc, char *argv[])
 125 {
 126   int optchar;
 127   int do_all = 0;
 128   int do_help = 0;
 129   int do_version = 0;
 130   int do_charmaps = 0;
 131
 132   /* Set initial values for global varaibles.  */
 133   show_category_name = 0;
 134   show_keyword_name = 0;
 135
 136   /* Set locale.  Do not set LC_ALL because the other categories must
 137      not be affected (acccording to POSIX.2).  */
 138   setlocale (LC_CTYPE, "");
 139   setlocale (LC_MESSAGES, "");
 140
 141   /* Initialize the message catalog.  */
 142   textdomain (PACKAGE);
 143
 144   while ((optchar = getopt_long (argc, argv, "achkmv", long_options, NULL))
 145          != EOF)
 146     switch (optchar)
 147       {
 148       case '\0':
 149         break;
 150       case 'a':
 151         do_all = 1;
 152         break;
 153       case 'c':
 154         show_category_name = 1;
 155         break;
 156       case 'h':
 157         do_help = 1;
 158         break;
 159       case 'k':
 160         show_keyword_name = 1;
 161         break;
 162       case 'm':
 163         do_charmaps = 1;
 164         break;
 165       case 'v':
 166         do_version = 1;
 167         break;
 168       default:
 169         error (1, 0, gettext ("illegal option \"%s\""), optarg);
 170         break;
 171       }
 172
 173   /* Version information is requested.  */
 174   if (do_version)
 175     {
 176       fprintf (stderr, "GNU %s %s\n", PACKAGE, VERSION);
 177       exit (EXIT_SUCCESS);
 178     }
 179
 180   /* Help is requested.  */
 181   if (do_help)
 182     usage (EXIT_SUCCESS);
 183
 184   /* `-a' requests the names of all available locales.  */
 185   if (do_all != 0)
 186     {
 187       write_locales ();
 188       exit (EXIT_SUCCESS);
 189     }
 190
 191   /* `m' requests the names of all available charmaps.  The names can be
 192      used for the -f argument to localedef(3).  */
 193   if (do_charmaps != 0)
 194     {
 195       write_charmaps ();
 196       exit (EXIT_SUCCESS);
 197     }
 198
 199   /* Specific information about the current locale are requested.
 200      Change to this locale now.  */
 201   setlocale (LC_ALL, "");
 202
 203   /* If no real argument is given we have to print the contents of the
 204      current locale definition variables.  These are LANG and the LC_*.  */
 205   if (optind == argc && show_keyword_name == 0 && show_category_name == 0)
 206     {
 207       show_locale_vars ();
 208       exit (EXIT_SUCCESS);
 209     }
 210
 211   /* Process all given names.  */
 212   while (optind <  argc)
 213     show_info (argv[optind++]);
 214
 215   exit (EXIT_SUCCESS);
 216 }
 217
 218
 219 /* Display usage information and exit.  */
 220 static void
 221 usage(int status)
 222 {
 223   if (status != EXIT_SUCCESS)
 224     fprintf (stderr, gettext ("Try `%s --help' for more information.\n"),
 225              program_invocation_name);
 226   else
 227     printf(gettext ("\
 228 Usage: %s [OPTION]... name\n\
 229 Mandatory arguments to long options are mandatory for short options too.\n\
 230   -h, --help            display this help and exit\n\
 231   -v, --version         output version information and exit\n\
 232 \n\
 233   -a, --all-locales     write names of available locales\n\
 234   -m, --charmaps        write names of available charmaps\n\
 235 \n\
 236   -c, --category-name   write names of selected categories\n\
 237   -k, --keyword-name    write names of selected keywords\n\
 238 \n\
 239 "), program_invocation_name);
 240
 241   exit (status);
 242 }
 243
 244
 245 /* Write the names of all available locales to stdout.  */
 246 static void
 247 write_locales (void)
 248 {
 249   DIR *dir;
 250   struct dirent *dirent;
 251
 252   /* `POSIX' locale is always available (POSIX.2 4.34.3).  */
 253   puts ("POSIX");
 254
 255   dir = opendir (LOCALE_PATH);
 256   if (dir == NULL)
 257     {
 258       error (1, errno, gettext ("cannot read locale directory `%s'"),
 259              LOCALE_PATH);
 260       return;
 261     }
 262
 263   /* Now we can look for all files in the directory.  */
 264   while ((dirent = readdir (dir)) != NULL)
 265     if (strcmp (dirent->d_name, ".") != 0
 266         && strcmp (dirent->d_name, "..") != 0)
 267       puts (dirent->d_name);
 268
 269   closedir (dir);
 270 }
 271
 272
 273 /* Write the names of all available character maps to stdout.  */
 274 static void
 275 write_charmaps (void)
 276 {
 277   DIR *dir;
 278   struct dirent *dirent;
 279
 280   dir = opendir (CHARMAP_PATH);
 281   if (dir == NULL)
 282     {
 283       error (1, errno, gettext ("cannot read character map directory `%s'"),
 284              CHARMAP_PATH);
 285       return;
 286     }
 287
 288   /* Now we can look for all files in the directory.  */
 289   while ((dirent = readdir (dir)) != NULL)
 290     if (strcmp (dirent->d_name, ".") != 0
 291         && strcmp (dirent->d_name, "..") != 0)
 292       puts (dirent->d_name);
 293
 294   closedir (dir);
 295 }
 296
 297
 298 /* We have to show the contents of the environments determining the
 299    locale.  */
 300 static void
 301 show_locale_vars (void)
 302 {
 303   size_t cat_no;
 304   const char *lcall = getenv ("LC_ALL");
 305   const char *lang = getenv ("LANG") ? : "POSIX";
 306
 307   void get_source (const char *name)
 308     {
 309       char *val = getenv (name);
 310
 311       if (lcall != NULL || val == NULL)
 312         printf ("%s=\"%s\"\n", name, lcall ? : lang);
 313       else
 314         printf ("%s=%s\n", name, val);
 315     }
 316
 317   /* LANG has to be the first value.  */
 318   printf ("LANG=%s\n", lang);
 319
 320   /* Now all categories in an unspecified order.  */
 321   for (cat_no = 0; cat_no < NCATEGORIES; ++cat_no)
 322     get_source (category[cat_no].name);
 323
 324   /* The last is the LC_ALL value.  */
 325   printf ("LC_ALL=%s\n", lcall ? : "");
 326 }
 327
 328
 329 /* Show the information request for NAME.  */
 330 static void
 331 show_info (const char *name)
 332 {
 333   size_t cat_no;
 334
 335   void print_item (struct cat_item *item)
 336     {
 337       if (show_keyword_name != 0)
 338         printf ("%s=", item->name);
 339
 340       switch (item->value_type)
 341         {
 342         case string:
 343           printf ("%s%s%s", show_keyword_name ? "\"" : "",
 344                   nl_langinfo (item->item_id) ? : "",
 345                   show_keyword_name ? "\"" : "");
 346           break;
 347         case stringarray:
 348           {
 349             int cnt;
 350             const char *val;
 351
 352             if (show_keyword_name)
 353               putchar ('"');
 354
 355             for (cnt = 0; cnt < item->max - 1; ++cnt)
 356               {
 357                 val = nl_langinfo (item->item_id + cnt);
 358                 printf ("%s;", val ? : "");
 359               }
 360
 361             val = nl_langinfo (item->item_id + cnt);
 362             printf ("%s", val ? : "");
 363
 364             if (show_keyword_name)
 365               putchar ('"');
 366           }
 367           break;
 368         case byte:
 369           {
 370             const char *val = nl_langinfo (item->item_id);
 371
 372             if (val != NULL)
 373               printf ("%d", *val == CHAR_MAX ? -1 : *val);
 374           }
 375           break;
 376         case bytearray:
 377           {
 378             const char *val = nl_langinfo (item->item_id);
 379             int cnt = val ? strlen (val) : 0;
 380
 381             while (cnt > 1)
 382               {
 383                 printf ("%d;", *val == CHAR_MAX ? -1 : *val);
 384                 --cnt;
 385                 ++val;
 386               }
 387
 388             printf ("%d", cnt == 0 || *val == CHAR_MAX ? -1 : *val);
 389           }
 390           break;
 391         case word:
 392           {
 393             unsigned int val = (unsigned int) nl_langinfo (item->item_id);
 394             printf ("%d", val);
 395           }
 396           break;
 397         default:
 398         }
 399       putchar ('\n');
 400     }
 401
 402   for (cat_no = 0; cat_no < NCATEGORIES; ++cat_no)
 403     {
 404       size_t item_no;
 405
 406       if (strcmp (name, category[cat_no].name) == 0)
 407         /* Print the whole category.  */
 408         {
 409           if (show_category_name != 0)
 410             puts (category[cat_no].name);
 411
 412           for (item_no = 0; item_no < category[cat_no].number; ++item_no)
 413             print_item (&category[cat_no].item_desc[item_no]);
 414
 415           return;
 416         }
 417
 418       for (item_no = 0; item_no < category[cat_no].number; ++item_no)
 419         if (strcmp (name, category[cat_no].item_desc[item_no].name) == 0)
 420           {
 421             if (show_category_name != 0)
 422               puts (category[cat_no].name);
 423
 424             print_item (&category[cat_no].item_desc[item_no]);
 425             return;
 426           }
 427     }
 428 }