locale/programs/locale.c

   1 /* locale - Implementation of the locale program according to POSIX 1003.2
   2 Copyright (C) 1995, 1996 Free Software Foundation, Inc.
   3 This file is part of the GNU C Library.
   4 Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995.
   5
   6 The GNU C Library is free software; you can redistribute it and/or
   7 modify it under the terms of the GNU Library General Public License as
   8 published by the Free Software Foundation; either version 2 of the
   9 License, or (at your option) any later version.
  10
  11 The GNU C Library is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 Library General Public License for more details.
  15
  16 You should have received a copy of the GNU Library General Public
  17 License along with the GNU C Library; see the file COPYING.LIB.  If
  18 not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21 #ifdef HAVE_CONFIG_H
  22 # include <config.h>
  23 #endif
  24
  25 #include <dirent.h>
  26 #include <error.h>
  27 #include <getopt.h>
  28 #include <langinfo.h>
  29 #include <libintl.h>
  30 #include <limits.h>
  31 #include <locale.h>
  32 #include <stdio.h>
  33 #include <stdlib.h>
  34 #include <unistd.h>
  35 #include <errno.h>
  36 #include <string.h>
  37
  38 #include "localeinfo.h"
  39
  40
  41 /* If set print the name of the category.  */
  42 static int show_category_name;
  43
  44 /* If set print the name of the item.  */
  45 static int show_keyword_name;
  46
  47 /* Long options.  */
  48 static const struct option long_options[] =
  49 {
  50   { "all-locales", no_argument, NULL, 'a' },
  51   { "category-name", no_argument, &show_category_name, 1 },
  52   { "charmaps", no_argument, NULL, 'm' },
  53   { "help", no_argument, NULL, 'h' },
  54   { "keyword-name", no_argument, &show_keyword_name, 1 },
  55   { "version", no_argument, NULL, 'V' },
  56   { NULL, 0, NULL, 0 }
  57 };
  58
  59
  60 /* We don't have these constants defined because we don't use them.  Give
  61    default values.  */
  62 #define CTYPE_MB_CUR_MIN 0
  63 #define CTYPE_MB_CUR_MAX 0
  64 #define CTYPE_HASH_SIZE 0
  65 #define CTYPE_HASH_LAYERS 0
  66 #define CTYPE_CLASS 0
  67 #define CTYPE_TOUPPER_EB 0
  68 #define CTYPE_TOLOWER_EB 0
  69 #define CTYPE_TOUPPER_EL 0
  70 #define CTYPE_TOLOWER_EL 0
  71
  72 /* Definition of the data structure which represents a category and its
  73    items.  */
  74 struct category
  75 {
  76   int cat_id;
  77   const char *name;
  78   size_t number;
  79   struct cat_item
  80   {
  81     int item_id;
  82     const char *name;
  83     enum { std, opt } status;
  84     enum value_type value_type;
  85     int min;
  86     int max;
  87   } *item_desc;
  88 };
  89
  90 /* Simple helper macro.  */
  91 #define NELEMS(arr) ((sizeof (arr)) / (sizeof (arr[0])))
  92
  93 /* For some tricky stuff.  */
  94 #define NO_PAREN(Item, More...) Item, ## More
  95
  96 /* We have all categories defined in `categories.def'.  Now construct
  97    the description and data structure used for all categories.  */
  98 #define DEFINE_ELEMENT(Item, More...) { Item, ## More },
  99 #define DEFINE_CATEGORY(category, name, items, postload, in, check, out)      \
 100     static struct cat_item category##_desc[] =                                \
 101       {                                                                       \
 102         NO_PAREN items                                                        \
 103       };
 104
 105 #include "categories.def"
 106 #undef DEFINE_CATEGORY
 107
 108 static struct category category[] =
 109   {
 110 #define DEFINE_CATEGORY(category, name, items, postload, in, check, out)      \
 111     [category] = { _NL_NUM_##category, name, NELEMS (category##_desc),        \
 112                    category##_desc },
 113 #include "categories.def"
 114 #undef DEFINE_CATEGORY
 115   };
 116 #define NCATEGORIES NELEMS (category)
 117
 118
 119 /* Automatically set variable.  */
 120 extern const char *__progname;
 121
 122 /* helper function for extended name handling.  */
 123 extern void locale_special (const char *name, int show_category_name,
 124                             int show_keyword_name);
 125
 126 /* Prototypes for local functions.  */
 127 static void usage (int status) __attribute__ ((noreturn));
 128 static void write_locales (void);
 129 static void write_charmaps (void);
 130 static void show_locale_vars (void);
 131 static void show_info (const char *name);
 132
 133
 134 int
 135 main (int argc, char *argv[])
 136 {
 137   int optchar;
 138   int do_all = 0;
 139   int do_help = 0;
 140   int do_version = 0;
 141   int do_charmaps = 0;
 142
 143   /* Set initial values for global variables.  */
 144   show_category_name = 0;
 145   show_keyword_name = 0;
 146
 147   /* Set locale.  Do not set LC_ALL because the other categories must
 148      not be affected (acccording to POSIX.2).  */
 149   setlocale (LC_CTYPE, "");
 150   setlocale (LC_MESSAGES, "");
 151
 152   /* Initialize the message catalog.  */
 153   textdomain (PACKAGE);
 154
 155   while ((optchar = getopt_long (argc, argv, "achkmV", long_options, NULL))
 156          != EOF)
 157     switch (optchar)
 158       {
 159       case '\0':                /* Long option.  */
 160         break;
 161       case 'a':
 162         do_all = 1;
 163         break;
 164       case 'c':
 165         show_category_name = 1;
 166         break;
 167       case 'h':
 168         do_help = 1;
 169         break;
 170       case 'k':
 171         show_keyword_name = 1;
 172         break;
 173       case 'm':
 174         do_charmaps = 1;
 175         break;
 176       case 'V':
 177         do_version = 1;
 178         break;
 179       default:
 180         usage (EXIT_FAILURE);
 181       }
 182
 183   /* Version information is requested.  */
 184   if (do_version)
 185     {
 186       printf ("locale (GNU %s) %s\n", PACKAGE, VERSION);
 187       printf (_("\
 188 Copyright (C) %s Free Software Foundation, Inc.\n\
 189 This is free software; see the source for copying conditions.  There is NO\n\
 190 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
 191 "), "1995, 1996");
 192       printf (_("Written by %s.\n"), "Ulrich Drepper");
 193
 194       exit (EXIT_SUCCESS);
 195     }
 196
 197   /* Help is requested.  */
 198   if (do_help)
 199     usage (EXIT_SUCCESS);
 200
 201   /* `-a' requests the names of all available locales.  */
 202   if (do_all != 0)
 203     {
 204       write_locales ();
 205       exit (EXIT_SUCCESS);
 206     }
 207
 208   /* `m' requests the names of all available charmaps.  The names can be
 209      used for the -f argument to localedef(3).  */
 210   if (do_charmaps != 0)
 211     {
 212       write_charmaps ();
 213       exit (EXIT_SUCCESS);
 214     }
 215
 216   /* Specific information about the current locale are requested.
 217      Change to this locale now.  */
 218   setlocale (LC_ALL, "");
 219
 220   /* If no real argument is given we have to print the contents of the
 221      current locale definition variables.  These are LANG and the LC_*.  */
 222   if (optind == argc && show_keyword_name == 0 && show_category_name == 0)
 223     {
 224       show_locale_vars ();
 225       exit (EXIT_SUCCESS);
 226     }
 227
 228   /* Process all given names.  */
 229   while (optind <  argc)
 230     show_info (argv[optind++]);
 231
 232   exit (EXIT_SUCCESS);
 233 }
 234
 235
 236 /* Display usage information and exit.  */
 237 static void
 238 usage (int status)
 239 {
 240   if (status != EXIT_SUCCESS)
 241     fprintf (stderr, gettext ("Try `%s --help' for more information.\n"),
 242              __progname);
 243   else
 244     {
 245       printf (gettext ("\
 246 Usage: %s [OPTION]... name\n\
 247 Mandatory arguments to long options are mandatory for short options too.\n\
 248   -h, --help            display this help and exit\n\
 249   -V, --version         output version information and exit\n\
 250 \n\
 251   -a, --all-locales     write names of available locales\n\
 252   -m, --charmaps        write names of available charmaps\n\
 253 \n\
 254   -c, --category-name   write names of selected categories\n\
 255   -k, --keyword-name    write names of selected keywords\n"),
 256               __progname);
 257       fputs (gettext ("Report bugs to <bug-glibc@prep.ai.mit.edu>.\n"),
 258              stdout);
 259     }
 260
 261   exit (status);
 262 }
 263
 264
 265 /* Write the names of all available locales to stdout.  */
 266 static void
 267 write_locales (void)
 268 {
 269   DIR *dir;
 270   struct dirent *dirent;
 271
 272   /* `POSIX' locale is always available (POSIX.2 4.34.3).  */
 273   puts ("POSIX");
 274
 275   dir = opendir (LOCALE_PATH);
 276   if (dir == NULL)
 277     {
 278       error (1, errno, gettext ("cannot read locale directory `%s'"),
 279              LOCALE_PATH);
 280       return;
 281     }
 282
 283   /* Now we can look for all files in the directory.  */
 284   while ((dirent = readdir (dir)) != NULL)
 285     if (strcmp (dirent->d_name, ".") != 0
 286         && strcmp (dirent->d_name, "..") != 0)
 287       puts (dirent->d_name);
 288
 289   closedir (dir);
 290 }
 291
 292
 293 /* Write the names of all available character maps to stdout.  */
 294 static void
 295 write_charmaps (void)
 296 {
 297   DIR *dir;
 298   struct dirent *dirent;
 299
 300   dir = opendir (CHARMAP_PATH);
 301   if (dir == NULL)
 302     {
 303       error (1, errno, gettext ("cannot read character map directory `%s'"),
 304              CHARMAP_PATH);
 305       return;
 306     }
 307
 308   /* Now we can look for all files in the directory.  */
 309   while ((dirent = readdir (dir)) != NULL)
 310     if (strcmp (dirent->d_name, ".") != 0
 311         && strcmp (dirent->d_name, "..") != 0)
 312       puts (dirent->d_name);
 313
 314   closedir (dir);
 315 }
 316
 317
 318 /* We have to show the contents of the environments determining the
 319    locale.  */
 320 static void
 321 show_locale_vars (void)
 322 {
 323   size_t cat_no;
 324   const char *lcall = getenv ("LC_ALL");
 325   const char *lang = getenv ("LANG") ? : "POSIX";
 326
 327   void get_source (const char *name)
 328     {
 329       char *val = getenv (name);
 330
 331       if (lcall != NULL || val == NULL)
 332         printf ("%s=\"%s\"\n", name, lcall ? : lang);
 333       else
 334         printf ("%s=%s\n", name, val);
 335     }
 336
 337   /* LANG has to be the first value.  */
 338   printf ("LANG=%s\n", lang);
 339
 340   /* Now all categories in an unspecified order.  */
 341   for (cat_no = 0; cat_no < NCATEGORIES; ++cat_no)
 342     get_source (category[cat_no].name);
 343
 344   /* The last is the LC_ALL value.  */
 345   printf ("LC_ALL=%s\n", lcall ? : "");
 346 }
 347
 348
 349 /* Show the information request for NAME.  */
 350 static void
 351 show_info (const char *name)
 352 {
 353   size_t cat_no;
 354
 355   void print_item (struct cat_item *item)
 356     {
 357       if (show_keyword_name != 0)
 358         printf ("%s=", item->name);
 359
 360       switch (item->value_type)
 361         {
 362         case string:
 363           printf ("%s%s%s", show_keyword_name ? "\"" : "",
 364                   nl_langinfo (item->item_id) ? : "",
 365                   show_keyword_name ? "\"" : "");
 366           break;
 367         case stringarray:
 368           {
 369             int cnt;
 370             const char *val;
 371
 372             if (show_keyword_name)
 373               putchar ('"');
 374
 375             for (cnt = 0; cnt < item->max - 1; ++cnt)
 376               {
 377                 val = nl_langinfo (item->item_id + cnt);
 378                 printf ("%s;", val ? : "");
 379               }
 380
 381             val = nl_langinfo (item->item_id + cnt);
 382             printf ("%s", val ? : "");
 383
 384             if (show_keyword_name)
 385               putchar ('"');
 386           }
 387           break;
 388         case byte:
 389           {
 390             const char *val = nl_langinfo (item->item_id);
 391
 392             if (val != NULL)
 393               printf ("%d", *val == CHAR_MAX ? -1 : *val);
 394           }
 395           break;
 396         case bytearray:
 397           {
 398             const char *val = nl_langinfo (item->item_id);
 399             int cnt = val ? strlen (val) : 0;
 400
 401             while (cnt > 1)
 402               {
 403                 printf ("%d;", *val == CHAR_MAX ? -1 : *val);
 404                 --cnt;
 405                 ++val;
 406               }
 407
 408             printf ("%d", cnt == 0 || *val == CHAR_MAX ? -1 : *val);
 409           }
 410           break;
 411         case word:
 412           {
 413             unsigned int val = (unsigned int) nl_langinfo (item->item_id);
 414             printf ("%d", val);
 415           }
 416           break;
 417         default:
 418         }
 419       putchar ('\n');
 420     }
 421
 422   for (cat_no = 0; cat_no < NCATEGORIES; ++cat_no)
 423     {
 424       size_t item_no;
 425
 426       if (strcmp (name, category[cat_no].name) == 0)
 427         /* Print the whole category.  */
 428         {
 429           if (show_category_name != 0)
 430             puts (category[cat_no].name);
 431
 432           for (item_no = 0; item_no < category[cat_no].number; ++item_no)
 433             print_item (&category[cat_no].item_desc[item_no]);
 434
 435           return;
 436         }
 437
 438       for (item_no = 0; item_no < category[cat_no].number; ++item_no)
 439         if (strcmp (name, category[cat_no].item_desc[item_no].name) == 0)
 440           {
 441             if (show_category_name != 0)
 442               puts (category[cat_no].name);
 443
 444             print_item (&category[cat_no].item_desc[item_no]);
 445             return;
 446           }
 447     }
 448
 449   /* When we get to here the name is not standard ones.  For testing
 450      and perhpas advanced use we allow some more symbols.  */
 451   locale_special (name, show_category_name, show_keyword_name);
 452 }