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 #include <string.h>
  34
  35 #include "localeinfo.h"
  36
  37
  38 /* If set print the name of the category.  */
  39 static int show_category_name;
  40
  41 /* If set print the name of the item.  */
  42 static int show_keyword_name;
  43
  44 /* Long options.  */
  45 static const struct option long_options[] =
  46 {
  47   { "all-locales", no_argument, NULL, 'a' },
  48   { "category-name", no_argument, &show_category_name, 1 },
  49   { "charmaps", no_argument, NULL, 'm' },
  50   { "help", no_argument, NULL, 'h' },
  51   { "keyword-name", no_argument, &show_keyword_name, 1 },
  52   { "version", no_argument, NULL, 'v' },
  53   { NULL, 0, NULL, 0 }
  54 };
  55
  56
  57 /* We don't have these constants defined because we don't use them.  Give
  58    default values.  */
  59 #define CTYPE_MB_CUR_MIN 0
  60 #define CTYPE_MB_CUR_MAX 0
  61 #define CTYPE_HASH_SIZE 0
  62 #define CTYPE_HASH_LAYERS 0
  63 #define CTYPE_CLASS 0
  64 #define CTYPE_TOUPPER_EB 0
  65 #define CTYPE_TOLOWER_EB 0
  66 #define CTYPE_TOUPPER_EL 0
  67 #define CTYPE_TOLOWER_EL 0
  68
  69 /* Definition of the data structure which represents a category and its
  70    items.  */
  71 struct category
  72 {
  73   int cat_id;
  74   const char *name;
  75   size_t number;
  76   struct cat_item
  77   {
  78     int item_id;
  79     const char *name;
  80     enum { std, opt } status;
  81     enum value_type value_type;
  82     int min;
  83     int max;
  84   } *item_desc;
  85 };
  86
  87 /* Simple helper macro.  */
  88 #define NELEMS(arr) ((sizeof (arr)) / (sizeof (arr[0])))
  89
  90 /* For some tricky stuff.  */
  91 #define NO_PAREN(Item, More...) Item, ## More
  92
  93 /* We have all categories defined in `categories.def'.  Now construct
  94    the description and data structure used for all categories.  */
  95 #define DEFINE_ELEMENT(Item, More...) { Item, ## More },
  96 #define DEFINE_CATEGORY(category, name, items, postload, in, check, out)      \
  97     static struct cat_item category##_desc[] =                                \
  98       {                                                                       \
  99         NO_PAREN items                                                        \
 100       };
 101
 102 #include "categories.def"
 103 #undef DEFINE_CATEGORY
 104
 105 static struct category category[] =
 106   {
 107 #define DEFINE_CATEGORY(category, name, items, postload, in, check, out)      \
 108     { _NL_NUM_##category, name, NELEMS (category##_desc) - 1,                 \
 109       category##_desc },
 110 #include "categories.def"
 111 #undef DEFINE_CATEGORY
 112   };
 113 #define NCATEGORIES NELEMS (category)
 114
 115
 116 /* Prototypes for local functions.  */
 117 static void usage (int status) __attribute__ ((noreturn));
 118 static void write_locales (void);
 119 static void write_charmaps (void);
 120 static void show_locale_vars (void);
 121 static void show_info (const char *name);
 122
 123
 124 int
 125 main (int argc, char *argv[])
 126 {
 127   int optchar;
 128   int do_all = 0;
 129   int do_help = 0;
 130   int do_version = 0;
 131   int do_charmaps = 0;
 132
 133   /* Set initial values for global varaibles.  */
 134   show_category_name = 0;
 135   show_keyword_name = 0;
 136
 137   /* Set locale.  Do not set LC_ALL because the other categories must
 138      not be affected (acccording to POSIX.2).  */
 139   setlocale (LC_CTYPE, "");
 140   setlocale (LC_MESSAGES, "");
 141
 142   /* Initialize the message catalog.  */
 143   textdomain (PACKAGE);
 144
 145   while ((optchar = getopt_long (argc, argv, "achkmv", long_options, NULL))
 146          != EOF)
 147     switch (optchar)
 148       {
 149       case '\0':
 150         break;
 151       case 'a':
 152         do_all = 1;
 153         break;
 154       case 'c':
 155         show_category_name = 1;
 156         break;
 157       case 'h':
 158         do_help = 1;
 159         break;
 160       case 'k':
 161         show_keyword_name = 1;
 162         break;
 163       case 'm':
 164         do_charmaps = 1;
 165         break;
 166       case 'v':
 167         do_version = 1;
 168         break;
 169       default:
 170         error (1, 0, gettext ("illegal option \"%s\""), optarg);
 171         break;
 172       }
 173
 174   /* Version information is requested.  */
 175   if (do_version)
 176     {
 177       fprintf (stderr, "GNU %s %s\n", PACKAGE, VERSION);
 178       exit (EXIT_SUCCESS);
 179     }
 180
 181   /* Help is requested.  */
 182   if (do_help)
 183     usage (EXIT_SUCCESS);
 184
 185   /* `-a' requests the names of all available locales.  */
 186   if (do_all != 0)
 187     {
 188       write_locales ();
 189       exit (EXIT_SUCCESS);
 190     }
 191
 192   /* `m' requests the names of all available charmaps.  The names can be
 193      used for the -f argument to localedef(3).  */
 194   if (do_charmaps != 0)
 195     {
 196       write_charmaps ();
 197       exit (EXIT_SUCCESS);
 198     }
 199
 200   /* Specific information about the current locale are requested.
 201      Change to this locale now.  */
 202   setlocale (LC_ALL, "");
 203
 204   /* If no real argument is given we have to print the contents of the
 205      current locale definition variables.  These are LANG and the LC_*.  */
 206   if (optind == argc && show_keyword_name == 0 && show_category_name == 0)
 207     {
 208       show_locale_vars ();
 209       exit (EXIT_SUCCESS);
 210     }
 211
 212   /* Process all given names.  */
 213   while (optind <  argc)
 214     show_info (argv[optind++]);
 215
 216   exit (EXIT_SUCCESS);
 217 }
 218
 219
 220 /* Display usage information and exit.  */
 221 static void
 222 usage(int status)
 223 {
 224   if (status != EXIT_SUCCESS)
 225     fprintf (stderr, gettext ("Try `%s --help' for more information.\n"),
 226              program_invocation_name);
 227   else
 228     printf(gettext ("\
 229 Usage: %s [OPTION]... name\n\
 230 Mandatory arguments to long options are mandatory for short options too.\n\
 231   -h, --help            display this help and exit\n\
 232   -v, --version         output version information and exit\n\
 233 \n\
 234   -a, --all-locales     write names of available locales\n\
 235   -m, --charmaps        write names of available charmaps\n\
 236 \n\
 237   -c, --category-name   write names of selected categories\n\
 238   -k, --keyword-name    write names of selected keywords\n\
 239 \n\
 240 "), program_invocation_name);
 241
 242   exit (status);
 243 }
 244
 245
 246 /* Write the names of all available locales to stdout.  */
 247 static void
 248 write_locales (void)
 249 {
 250   DIR *dir;
 251   struct dirent *dirent;
 252
 253   /* `POSIX' locale is always available (POSIX.2 4.34.3).  */
 254   puts ("POSIX");
 255
 256   dir = opendir (LOCALE_PATH);
 257   if (dir == NULL)
 258     {
 259       error (1, errno, gettext ("cannot read locale directory `%s'"),
 260              LOCALE_PATH);
 261       return;
 262     }
 263
 264   /* Now we can look for all files in the directory.  */
 265   while ((dirent = readdir (dir)) != NULL)
 266     if (strcmp (dirent->d_name, ".") != 0
 267         && strcmp (dirent->d_name, "..") != 0)
 268       puts (dirent->d_name);
 269
 270   closedir (dir);
 271 }
 272
 273
 274 /* Write the names of all available character maps to stdout.  */
 275 static void
 276 write_charmaps (void)
 277 {
 278   DIR *dir;
 279   struct dirent *dirent;
 280
 281   dir = opendir (CHARMAP_PATH);
 282   if (dir == NULL)
 283     {
 284       error (1, errno, gettext ("cannot read character map directory `%s'"),
 285              CHARMAP_PATH);
 286       return;
 287     }
 288
 289   /* Now we can look for all files in the directory.  */
 290   while ((dirent = readdir (dir)) != NULL)
 291     if (strcmp (dirent->d_name, ".") != 0
 292         && strcmp (dirent->d_name, "..") != 0)
 293       puts (dirent->d_name);
 294
 295   closedir (dir);
 296 }
 297
 298
 299 /* We have to show the contents of the environments determining the
 300    locale.  */
 301 static void
 302 show_locale_vars (void)
 303 {
 304   size_t cat_no;
 305   const char *lcall = getenv ("LC_ALL");
 306   const char *lang = getenv ("LANG") ? : "POSIX";
 307
 308   void get_source (const char *name)
 309     {
 310       char *val = getenv (name);
 311
 312       if (lcall != NULL || val == NULL)
 313         printf ("%s=\"%s\"\n", name, lcall ? : lang);
 314       else
 315         printf ("%s=%s\n", name, val);
 316     }
 317
 318   /* LANG has to be the first value.  */
 319   printf ("LANG=%s\n", lang);
 320
 321   /* Now all categories in an unspecified order.  */
 322   for (cat_no = 0; cat_no < NCATEGORIES; ++cat_no)
 323     get_source (category[cat_no].name);
 324
 325   /* The last is the LC_ALL value.  */
 326   printf ("LC_ALL=%s\n", lcall ? : "");
 327 }
 328
 329
 330 /* Show the information request for NAME.  */
 331 static void
 332 show_info (const char *name)
 333 {
 334   size_t cat_no;
 335
 336   void print_item (struct cat_item *item)
 337     {
 338       if (show_keyword_name != 0)
 339         printf ("%s=", item->name);
 340
 341       switch (item->value_type)
 342         {
 343         case string:
 344           printf ("%s%s%s", show_keyword_name ? "\"" : "",
 345                   nl_langinfo (item->item_id) ? : "",
 346                   show_keyword_name ? "\"" : "");
 347           break;
 348         case stringarray:
 349           {
 350             int cnt;
 351             const char *val;
 352
 353             if (show_keyword_name)
 354               putchar ('"');
 355
 356             for (cnt = 0; cnt < item->max - 1; ++cnt)
 357               {
 358                 val = nl_langinfo (item->item_id + cnt);
 359                 printf ("%s;", val ? : "");
 360               }
 361
 362             val = nl_langinfo (item->item_id + cnt);
 363             printf ("%s", val ? : "");
 364
 365             if (show_keyword_name)
 366               putchar ('"');
 367           }
 368           break;
 369         case byte:
 370           {
 371             const char *val = nl_langinfo (item->item_id);
 372
 373             if (val != NULL)
 374               printf ("%d", *val == CHAR_MAX ? -1 : *val);
 375           }
 376           break;
 377         case bytearray:
 378           {
 379             const char *val = nl_langinfo (item->item_id);
 380             int cnt = val ? strlen (val) : 0;
 381
 382             while (cnt > 1)
 383               {
 384                 printf ("%d;", *val == CHAR_MAX ? -1 : *val);
 385                 --cnt;
 386                 ++val;
 387               }
 388
 389             printf ("%d", cnt == 0 || *val == CHAR_MAX ? -1 : *val);
 390           }
 391           break;
 392         case word:
 393           {
 394             unsigned int val = (unsigned int) nl_langinfo (item->item_id);
 395             printf ("%d", val);
 396           }
 397           break;
 398         default:
 399         }
 400       putchar ('\n');
 401     }
 402
 403   for (cat_no = 0; cat_no < NCATEGORIES; ++cat_no)
 404     {
 405       size_t item_no;
 406
 407       if (strcmp (name, category[cat_no].name) == 0)
 408         /* Print the whole category.  */
 409         {
 410           if (show_category_name != 0)
 411             puts (category[cat_no].name);
 412
 413           for (item_no = 0; item_no < category[cat_no].number; ++item_no)
 414             print_item (&category[cat_no].item_desc[item_no]);
 415
 416           return;
 417         }
 418
 419       for (item_no = 0; item_no < category[cat_no].number; ++item_no)
 420         if (strcmp (name, category[cat_no].item_desc[item_no].name) == 0)
 421           {
 422             if (show_category_name != 0)
 423               puts (category[cat_no].name);
 424
 425             print_item (&category[cat_no].item_desc[item_no]);
 426             return;
 427           }
 428     }
 429 }