locale/setlocale-fbsd.c

   1 /*
   2  * Copyright (c) 1996 - 2002 FreeBSD Project
   3  * Copyright (c) 1991, 1993
   4  *      The Regents of the University of California.  All rights reserved.
   5  *
   6  * This code is derived from software contributed to Berkeley by
   7  * Paul Borman at Krystal Technologies.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed by the University of
  20  *      California, Berkeley and its contributors.
  21  * 4. Neither the name of the University nor the names of its contributors
  22  *    may be used to endorse or promote products derived from this software
  23  *    without specific prior written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  35  * SUCH DAMAGE.
  36  */
  37
  38 #if defined(LIBC_SCCS) && !defined(lint)
  39 static char sccsid[] = "@(#)setlocale.c 8.1 (Berkeley) 7/4/93";
  40 #endif /* LIBC_SCCS and not lint */
  41 #include <sys/cdefs.h>
  42 __FBSDID("$FreeBSD: src/lib/libc/locale/setlocale.c,v 1.50 2004/01/31 19:15:32 ache Exp $");
  43
  44 #include "xlocale_private.h"
  45
  46 #include <sys/types.h>
  47 #include <sys/stat.h>
  48 #include <errno.h>
  49 #include <limits.h>
  50 #include <locale.h>
  51 #include <paths.h>      /* for _PATH_LOCALE */
  52 #include <stdlib.h>
  53 #include <string.h>
  54 #include <unistd.h>
  55 #include "collate.h"
  56 #include "lmonetary.h"  /* for __monetary_load_locale() */
  57 #include "lnumeric.h"   /* for __numeric_load_locale() */
  58 #include "lmessages.h"  /* for __messages_load_locale() */
  59 #include "setlocale.h"
  60 #include "ldpart.h"
  61 #include "timelocal.h" /* for __time_load_locale() */
  62
  63 /*
  64  * Category names for getenv()
  65  */
  66 static char *categories[_LC_LAST] = {
  67     "LC_ALL",
  68     "LC_COLLATE",
  69     "LC_CTYPE",
  70     "LC_MONETARY",
  71     "LC_NUMERIC",
  72     "LC_TIME",
  73     "LC_MESSAGES",
  74 };
  75
  76 /*
  77  * Current locales for each category
  78  */
  79 static char current_categories[_LC_LAST][ENCODING_LEN + 1] = {
  80     "C",
  81     "C",
  82     "C",
  83     "C",
  84     "C",
  85     "C",
  86     "C",
  87 };
  88
  89 /*
  90  * Path to locale storage directory
  91  */
  92 char    *_PathLocale;
  93
  94 /*
  95  * The locales we are going to try and load
  96  */
  97 static char new_categories[_LC_LAST][ENCODING_LEN + 1];
  98 static char saved_categories[_LC_LAST][ENCODING_LEN + 1];
  99
 100 static char current_locale_string[_LC_LAST * (ENCODING_LEN + 1/*"/"*/ + 1)];
 101
 102 static char     *currentlocale(void);
 103 static char     *loadlocale(int);
 104 __private_extern__ const char *__get_locale_env(int);
 105
 106 #define UNLOCK_AND_RETURN(x)    {XL_UNLOCK(&__global_locale); return (x);}
 107
 108 char *
 109 setlocale(category, locale)
 110         int category;
 111         const char *locale;
 112 {
 113         int i, j, len, saverr, save__numeric_fp_cvt;
 114         const char *env, *r;
 115         locale_t save__lc_numeric_loc;
 116
 117         if (category < LC_ALL || category >= _LC_LAST) {
 118                 errno = EINVAL;
 119                 return (NULL);
 120         }
 121
 122         if (locale == NULL)
 123                 return (category != LC_ALL ?
 124                     current_categories[category] : currentlocale());
 125
 126         XL_LOCK(&__global_locale);
 127         /*
 128          * Default to the current locale for everything.
 129          */
 130         for (i = 1; i < _LC_LAST; ++i)
 131                 (void)strcpy(new_categories[i], current_categories[i]);
 132
 133         /*
 134          * Now go fill up new_categories from the locale argument
 135          */
 136         if (!*locale) {
 137                 if (category == LC_ALL) {
 138                         for (i = 1; i < _LC_LAST; ++i) {
 139                                 env = __get_locale_env(i);
 140                                 if (strlen(env) > ENCODING_LEN) {
 141                                         errno = EINVAL;
 142                                         UNLOCK_AND_RETURN (NULL);
 143                                 }
 144                                 (void)strcpy(new_categories[i], env);
 145                         }
 146                 } else {
 147                         env = __get_locale_env(category);
 148                         if (strlen(env) > ENCODING_LEN) {
 149                                 errno = EINVAL;
 150                                 UNLOCK_AND_RETURN (NULL);
 151                         }
 152                         (void)strcpy(new_categories[category], env);
 153                 }
 154         } else if (category != LC_ALL) {
 155                 if (strlen(locale) > ENCODING_LEN) {
 156                         errno = EINVAL;
 157                         UNLOCK_AND_RETURN (NULL);
 158                 }
 159                 (void)strcpy(new_categories[category], locale);
 160         } else {
 161                 if ((r = strchr(locale, '/')) == NULL) {
 162                         if (strlen(locale) > ENCODING_LEN) {
 163                                 errno = EINVAL;
 164                                 UNLOCK_AND_RETURN (NULL);
 165                         }
 166                         for (i = 1; i < _LC_LAST; ++i)
 167                                 (void)strcpy(new_categories[i], locale);
 168                 } else {
 169                         for (i = 1; r[1] == '/'; ++r)
 170                                 ;
 171                         if (!r[1]) {
 172                                 errno = EINVAL;
 173                                 UNLOCK_AND_RETURN (NULL);       /* Hmm, just slashes... */
 174                         }
 175                         do {
 176                                 if (i == _LC_LAST)
 177                                         break;  /* Too many slashes... */
 178                                 if ((len = r - locale) > ENCODING_LEN) {
 179                                         errno = EINVAL;
 180                                         UNLOCK_AND_RETURN (NULL);
 181                                 }
 182                                 (void)strlcpy(new_categories[i], locale,
 183                                               len + 1);
 184                                 i++;
 185                                 while (*r == '/')
 186                                         r++;
 187                                 locale = r;
 188                                 while (*r && *r != '/')
 189                                         r++;
 190                         } while (*locale);
 191                         while (i < _LC_LAST) {
 192                                 (void)strcpy(new_categories[i],
 193                                              new_categories[i-1]);
 194                                 i++;
 195                         }
 196                 }
 197         }
 198
 199         if (category != LC_ALL)
 200                 UNLOCK_AND_RETURN (loadlocale(category));
 201
 202         save__numeric_fp_cvt = __global_locale.__numeric_fp_cvt;
 203         save__lc_numeric_loc = __global_locale.__lc_numeric_loc;
 204         XL_RETAIN(save__lc_numeric_loc);
 205         for (i = 1; i < _LC_LAST; ++i) {
 206                 (void)strcpy(saved_categories[i], current_categories[i]);
 207                 if (loadlocale(i) == NULL) {
 208                         saverr = errno;
 209                         for (j = 1; j < i; j++) {
 210                                 (void)strcpy(new_categories[j],
 211                                              saved_categories[j]);
 212                                 if (loadlocale(j) == NULL) {
 213                                         (void)strcpy(new_categories[j], "C");
 214                                         (void)loadlocale(j);
 215                                 }
 216                         }
 217                         __global_locale.__numeric_fp_cvt = save__numeric_fp_cvt;
 218                         __global_locale.__lc_numeric_loc = save__lc_numeric_loc;
 219                         XL_RELEASE(save__lc_numeric_loc);
 220                         errno = saverr;
 221                         UNLOCK_AND_RETURN (NULL);
 222                 }
 223         }
 224         XL_RELEASE(save__lc_numeric_loc);
 225         UNLOCK_AND_RETURN (currentlocale());
 226 }
 227
 228 static char *
 229 currentlocale()
 230 {
 231         int i;
 232
 233         (void)strcpy(current_locale_string, current_categories[1]);
 234
 235         for (i = 2; i < _LC_LAST; ++i)
 236                 if (strcmp(current_categories[1], current_categories[i])) {
 237                         for (i = 2; i < _LC_LAST; ++i) {
 238                                 (void)strcat(current_locale_string, "/");
 239                                 (void)strcat(current_locale_string,
 240                                              current_categories[i]);
 241                         }
 242                         break;
 243                 }
 244         return (current_locale_string);
 245 }
 246
 247 static char *
 248 loadlocale(category)
 249         int category;
 250 {
 251         char *new = new_categories[category];
 252         char *old = current_categories[category];
 253         int (*func)(const char *, locale_t);
 254         int saved_errno;
 255
 256         if ((new[0] == '.' &&
 257              (new[1] == '\0' || (new[1] == '.' && new[2] == '\0'))) ||
 258             strchr(new, '/') != NULL) {
 259                 errno = EINVAL;
 260                 return (NULL);
 261         }
 262
 263         saved_errno = errno;
 264         errno = __detect_path_locale();
 265         if (errno != 0)
 266                 return (NULL);
 267         errno = saved_errno;
 268
 269         switch (category) {
 270         case LC_CTYPE:
 271                 func = __wrap_setrunelocale;
 272                 break;
 273         case LC_COLLATE:
 274                 func = __collate_load_tables;
 275                 break;
 276         case LC_TIME:
 277                 func = __time_load_locale;
 278                 break;
 279         case LC_NUMERIC:
 280                 func = __numeric_load_locale;
 281                 break;
 282         case LC_MONETARY:
 283                 func = __monetary_load_locale;
 284                 break;
 285         case LC_MESSAGES:
 286                 func = __messages_load_locale;
 287                 break;
 288         default:
 289                 errno = EINVAL;
 290                 return (NULL);
 291         }
 292
 293         if (strcmp(new, old) == 0)
 294                 return (old);
 295
 296         if (func(new, &__global_locale) != _LDP_ERROR) {
 297                 (void)strcpy(old, new);
 298                 switch (category) {
 299                 case LC_CTYPE:
 300                         if (__global_locale.__numeric_fp_cvt == LC_NUMERIC_FP_SAME_LOCALE)
 301                                 __global_locale.__numeric_fp_cvt = LC_NUMERIC_FP_UNINITIALIZED;
 302                         break;
 303                 case LC_NUMERIC:
 304                         __global_locale.__numeric_fp_cvt = LC_NUMERIC_FP_UNINITIALIZED;
 305                         XL_RELEASE(__global_locale.__lc_numeric_loc);
 306                         __global_locale.__lc_numeric_loc = NULL;
 307                         break;
 308                 }
 309                 return (old);
 310         }
 311
 312         return (NULL);
 313 }
 314
 315 __private_extern__ const char *
 316 __get_locale_env(category)
 317         int category;
 318 {
 319         const char *env;
 320
 321         /* 1. check LC_ALL. */
 322         env = getenv(categories[0]);
 323
 324         /* 2. check LC_* */
 325         if (env == NULL || !*env)
 326                 env = getenv(categories[category]);
 327
 328         /* 3. check LANG */
 329         if (env == NULL || !*env)
 330                 env = getenv("LANG");
 331
 332         /* 4. if none is set, fall to "C" */
 333         if (env == NULL || !*env)
 334                 env = "C";
 335
 336         return (env);
 337 }
 338
 339 /*
 340  * Detect locale storage location and store its value to _PathLocale variable
 341  */
 342 __private_extern__ int
 343 __detect_path_locale(void)
 344 {
 345         if (_PathLocale == NULL) {
 346                 char *p = getenv("PATH_LOCALE");
 347
 348                 if (p != NULL && !issetugid()) {
 349                         if (strlen(p) + 1/*"/"*/ + ENCODING_LEN +
 350                             1/*"/"*/ + CATEGORY_LEN >= PATH_MAX)
 351                                 return (ENAMETOOLONG);
 352                         _PathLocale = strdup(p);
 353                         if (_PathLocale == NULL)
 354                                 return (errno == 0 ? ENOMEM : errno);
 355                 } else
 356                         _PathLocale = _PATH_LOCALE;
 357         }
 358         return (0);
 359 }
 360