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 variables.  */
 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         usage (EXIT_FAILURE);
 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             program_invocation_name);
 239
 240   exit (status);
 241 }
 242
 243
 244 /* Write the names of all available locales to stdout.  */
 245 static void
 246 write_locales (void)
 247 {
 248   DIR *dir;
 249   struct dirent *dirent;
 250
 251   /* `POSIX' locale is always available (POSIX.2 4.34.3).  */
 252   puts ("POSIX");
 253
 254   dir = opendir (LOCALE_PATH);
 255   if (dir == NULL)
 256     {
 257       error (1, errno, gettext ("cannot read locale directory `%s'"),
 258              LOCALE_PATH);
 259       return;
 260     }
 261
 262   /* Now we can look for all files in the directory.  */
 263   while ((dirent = readdir (dir)) != NULL)
 264     if (strcmp (dirent->d_name, ".") != 0
 265         && strcmp (dirent->d_name, "..") != 0)
 266       puts (dirent->d_name);
 267
 268   closedir (dir);
 269 }
 270
 271
 272 /* Write the names of all available character maps to stdout.  */
 273 static void
 274 write_charmaps (void)
 275 {
 276   DIR *dir;
 277   struct dirent *dirent;
 278
 279   dir = opendir (CHARMAP_PATH);
 280   if (dir == NULL)
 281     {
 282       error (1, errno, gettext ("cannot read character map directory `%s'"),
 283              CHARMAP_PATH);
 284       return;
 285     }
 286
 287   /* Now we can look for all files in the directory.  */
 288   while ((dirent = readdir (dir)) != NULL)
 289     if (strcmp (dirent->d_name, ".") != 0
 290         && strcmp (dirent->d_name, "..") != 0)
 291       puts (dirent->d_name);
 292
 293   closedir (dir);
 294 }
 295
 296
 297 /* We have to show the contents of the environments determining the
 298    locale.  */
 299 static void
 300 show_locale_vars (void)
 301 {
 302   size_t cat_no;
 303   const char *lcall = getenv ("LC_ALL");
 304   const char *lang = getenv ("LANG") ? : "POSIX";
 305
 306   void get_source (const char *name)
 307     {
 308       char *val = getenv (name);
 309
 310       if (lcall != NULL || val == NULL)
 311         printf ("%s=\"%s\"\n", name, lcall ? : lang);
 312       else
 313         printf ("%s=%s\n", name, val);
 314     }
 315
 316   /* LANG has to be the first value.  */
 317   printf ("LANG=%s\n", lang);
 318
 319   /* Now all categories in an unspecified order.  */
 320   for (cat_no = 0; cat_no < NCATEGORIES; ++cat_no)
 321     get_source (category[cat_no].name);
 322
 323   /* The last is the LC_ALL value.  */
 324   printf ("LC_ALL=%s\n", lcall ? : "");
 325 }
 326
 327
 328 /* Show the information request for NAME.  */
 329 static void
 330 show_info (const char *name)
 331 {
 332   size_t cat_no;
 333
 334   void print_item (struct cat_item *item)
 335     {
 336       if (show_keyword_name != 0)
 337         printf ("%s=", item->name);
 338
 339       switch (item->value_type)
 340         {
 341         case string:
 342           printf ("%s%s%s", show_keyword_name ? "\"" : "",
 343                   nl_langinfo (item->item_id) ? : "",
 344                   show_keyword_name ? "\"" : "");
 345           break;
 346         case stringarray:
 347           {
 348             int cnt;
 349             const char *val;
 350
 351             if (show_keyword_name)
 352               putchar ('"');
 353
 354             for (cnt = 0; cnt < item->max - 1; ++cnt)
 355               {
 356                 val = nl_langinfo (item->item_id + cnt);
 357                 printf ("%s;", val ? : "");
 358               }
 359
 360             val = nl_langinfo (item->item_id + cnt);
 361             printf ("%s", val ? : "");
 362
 363             if (show_keyword_name)
 364               putchar ('"');
 365           }
 366           break;
 367         case byte:
 368           {
 369             const char *val = nl_langinfo (item->item_id);
 370
 371             if (val != NULL)
 372               printf ("%d", *val == CHAR_MAX ? -1 : *val);
 373           }
 374           break;
 375         case bytearray:
 376           {
 377             const char *val = nl_langinfo (item->item_id);
 378             int cnt = val ? strlen (val) : 0;
 379
 380             while (cnt > 1)
 381               {
 382                 printf ("%d;", *val == CHAR_MAX ? -1 : *val);
 383                 --cnt;
 384                 ++val;
 385               }
 386
 387             printf ("%d", cnt == 0 || *val == CHAR_MAX ? -1 : *val);
 388           }
 389           break;
 390         case word:
 391           {
 392             unsigned int val = (unsigned int) nl_langinfo (item->item_id);
 393             printf ("%d", val);
 394           }
 395           break;
 396         default:
 397         }
 398       putchar ('\n');
 399     }
 400
 401   for (cat_no = 0; cat_no < NCATEGORIES; ++cat_no)
 402     {
 403       size_t item_no;
 404
 405       if (strcmp (name, category[cat_no].name) == 0)
 406         /* Print the whole category.  */
 407         {
 408           if (show_category_name != 0)
 409             puts (category[cat_no].name);
 410
 411           for (item_no = 0; item_no < category[cat_no].number; ++item_no)
 412             print_item (&category[cat_no].item_desc[item_no]);
 413
 414           return;
 415         }
 416
 417       for (item_no = 0; item_no < category[cat_no].number; ++item_no)
 418         if (strcmp (name, category[cat_no].item_desc[item_no].name) == 0)
 419           {
 420             if (show_category_name != 0)
 421               puts (category[cat_no].name);
 422
 423             print_item (&category[cat_no].item_desc[item_no]);
 424             return;
 425           }
 426     }
 427 }