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  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #if defined(LIBC_SCCS) && !defined(lint)
  35 static char sccsid[] = "@(#)setlocale.c 8.1 (Berkeley) 7/4/93";
  36 #endif /* LIBC_SCCS and not lint */
  37 #include <sys/cdefs.h>
  38 __FBSDID("$FreeBSD: src/lib/libc/locale/setlocale.c,v 1.51 2007/01/09 00:28:00 imp Exp $");
  39
  40 #include "xlocale_private.h"
  41
  42 #include <sys/types.h>
  43 #include <sys/stat.h>
  44 #include <errno.h>
  45 #include <limits.h>
  46 #include <locale.h>
  47 #include <paths.h>      /* for _PATH_LOCALE */
  48 #include <stdlib.h>
  49 #include <string.h>
  50 #include <unistd.h>
  51 #include "collate.h"
  52 #include "lmonetary.h"  /* for __monetary_load_locale() */
  53 #include "lnumeric.h"   /* for __numeric_load_locale() */
  54 #include "lmessages.h"  /* for __messages_load_locale() */
  55 #include "setlocale.h"
  56 #include "ldpart.h"
  57 #include "timelocal.h" /* for __time_load_locale() */
  58
  59 /*
  60  * Category names for getenv()
  61  */
  62 static char *categories[_LC_LAST] = {
  63     "LC_ALL",
  64     "LC_COLLATE",
  65     "LC_CTYPE",
  66     "LC_MONETARY",
  67     "LC_NUMERIC",
  68     "LC_TIME",
  69     "LC_MESSAGES",
  70 };
  71
  72 /*
  73  * Current locales for each category
  74  */
  75 static char current_categories[_LC_LAST][ENCODING_LEN + 1] = {
  76     "C",
  77     "C",
  78     "C",
  79     "C",
  80     "C",
  81     "C",
  82     "C",
  83 };
  84
  85 /*
  86  * Path to locale storage directory
  87  */
  88 char    *_PathLocale;
  89
  90 /*
  91  * The locales we are going to try and load
  92  */
  93 static char new_categories[_LC_LAST][ENCODING_LEN + 1];
  94 static char saved_categories[_LC_LAST][ENCODING_LEN + 1];
  95
  96 static char current_locale_string[_LC_LAST * (ENCODING_LEN + 1/*"/"*/ + 1)];
  97
  98 static char     *currentlocale(void);
  99 static char     *loadlocale(int);
 100 __private_extern__ const char *__get_locale_env(int);
 101
 102 #define UNLOCK_AND_RETURN(x)    {XL_UNLOCK(&__global_locale); return (x);}
 103
 104 char *
 105 setlocale(category, locale)
 106         int category;
 107         const char *locale;
 108 {
 109         int i, j, len, saverr, save__numeric_fp_cvt;
 110         const char *env, *r;
 111         locale_t save__lc_numeric_loc;
 112
 113         if (category < LC_ALL || category >= _LC_LAST) {
 114                 errno = EINVAL;
 115                 return (NULL);
 116         }
 117
 118         if (locale == NULL)
 119                 return (category != LC_ALL ?
 120                     current_categories[category] : currentlocale());
 121
 122         XL_LOCK(&__global_locale);
 123         /*
 124          * Default to the current locale for everything.
 125          */
 126         for (i = 1; i < _LC_LAST; ++i)
 127                 (void)strcpy(new_categories[i], current_categories[i]);
 128
 129         /*
 130          * Now go fill up new_categories from the locale argument
 131          */
 132         if (!*locale) {
 133                 if (category == LC_ALL) {
 134                         for (i = 1; i < _LC_LAST; ++i) {
 135                                 env = __get_locale_env(i);
 136                                 if (strlen(env) > ENCODING_LEN) {
 137                                         errno = EINVAL;
 138                                         UNLOCK_AND_RETURN (NULL);
 139                                 }
 140                                 (void)strcpy(new_categories[i], env);
 141                         }
 142                 } else {
 143                         env = __get_locale_env(category);
 144                         if (strlen(env) > ENCODING_LEN) {
 145                                 errno = EINVAL;
 146                                 UNLOCK_AND_RETURN (NULL);
 147                         }
 148                         (void)strcpy(new_categories[category], env);
 149                 }
 150         } else if (category != LC_ALL) {
 151                 if (strlen(locale) > ENCODING_LEN) {
 152                         errno = EINVAL;
 153                         UNLOCK_AND_RETURN (NULL);
 154                 }
 155                 (void)strcpy(new_categories[category], locale);
 156         } else {
 157                 if ((r = strchr(locale, '/')) == NULL) {
 158                         if (strlen(locale) > ENCODING_LEN) {
 159                                 errno = EINVAL;
 160                                 UNLOCK_AND_RETURN (NULL);
 161                         }
 162                         for (i = 1; i < _LC_LAST; ++i)
 163                                 (void)strcpy(new_categories[i], locale);
 164                 } else {
 165                         for (i = 1; r[1] == '/'; ++r)
 166                                 ;
 167                         if (!r[1]) {
 168                                 errno = EINVAL;
 169                                 UNLOCK_AND_RETURN (NULL);       /* Hmm, just slashes... */
 170                         }
 171                         do {
 172                                 if (i == _LC_LAST)
 173                                         break;  /* Too many slashes... */
 174                                 if ((len = r - locale) > ENCODING_LEN) {
 175                                         errno = EINVAL;
 176                                         UNLOCK_AND_RETURN (NULL);
 177                                 }
 178                                 (void)strlcpy(new_categories[i], locale,
 179                                               len + 1);
 180                                 i++;
 181                                 while (*r == '/')
 182                                         r++;
 183                                 locale = r;
 184                                 while (*r && *r != '/')
 185                                         r++;
 186                         } while (*locale);
 187                         while (i < _LC_LAST) {
 188                                 (void)strcpy(new_categories[i],
 189                                              new_categories[i-1]);
 190                                 i++;
 191                         }
 192                 }
 193         }
 194
 195         if (category != LC_ALL)
 196                 UNLOCK_AND_RETURN (loadlocale(category));
 197
 198         save__numeric_fp_cvt = __global_locale.__numeric_fp_cvt;
 199         save__lc_numeric_loc = __global_locale.__lc_numeric_loc;
 200         XL_RETAIN(save__lc_numeric_loc);
 201         for (i = 1; i < _LC_LAST; ++i) {
 202                 (void)strcpy(saved_categories[i], current_categories[i]);
 203                 if (loadlocale(i) == NULL) {
 204                         saverr = errno;
 205                         for (j = 1; j < i; j++) {
 206                                 (void)strcpy(new_categories[j],
 207                                              saved_categories[j]);
 208                                 if (loadlocale(j) == NULL) {
 209                                         (void)strcpy(new_categories[j], "C");
 210                                         (void)loadlocale(j);
 211                                 }
 212                         }
 213                         __global_locale.__numeric_fp_cvt = save__numeric_fp_cvt;
 214                         __global_locale.__lc_numeric_loc = save__lc_numeric_loc;
 215                         XL_RELEASE(save__lc_numeric_loc);
 216                         errno = saverr;
 217                         UNLOCK_AND_RETURN (NULL);
 218                 }
 219         }
 220         XL_RELEASE(save__lc_numeric_loc);
 221         UNLOCK_AND_RETURN (currentlocale());
 222 }
 223
 224 static char *
 225 currentlocale()
 226 {
 227         int i;
 228
 229         (void)strcpy(current_locale_string, current_categories[1]);
 230
 231         for (i = 2; i < _LC_LAST; ++i)
 232                 if (strcmp(current_categories[1], current_categories[i])) {
 233                         for (i = 2; i < _LC_LAST; ++i) {
 234                                 (void)strcat(current_locale_string, "/");
 235                                 (void)strcat(current_locale_string,
 236                                              current_categories[i]);
 237                         }
 238                         break;
 239                 }
 240         return (current_locale_string);
 241 }
 242
 243 static char *
 244 loadlocale(category)
 245         int category;
 246 {
 247         char *new = new_categories[category];
 248         char *old = current_categories[category];
 249         int (*func)(const char *, locale_t);
 250         int saved_errno;
 251
 252         if ((new[0] == '.' &&
 253              (new[1] == '\0' || (new[1] == '.' && new[2] == '\0'))) ||
 254             strchr(new, '/') != NULL) {
 255                 errno = EINVAL;
 256                 return (NULL);
 257         }
 258
 259         saved_errno = errno;
 260         errno = __detect_path_locale();
 261         if (errno != 0)
 262                 return (NULL);
 263         errno = saved_errno;
 264
 265         switch (category) {
 266         case LC_CTYPE:
 267                 func = __wrap_setrunelocale;
 268                 break;
 269         case LC_COLLATE:
 270                 func = __collate_load_tables;
 271                 break;
 272         case LC_TIME:
 273                 func = __time_load_locale;
 274                 break;
 275         case LC_NUMERIC:
 276                 func = __numeric_load_locale;
 277                 break;
 278         case LC_MONETARY:
 279                 func = __monetary_load_locale;
 280                 break;
 281         case LC_MESSAGES:
 282                 func = __messages_load_locale;
 283                 break;
 284         default:
 285                 errno = EINVAL;
 286                 return (NULL);
 287         }
 288
 289         if (strcmp(new, old) == 0)
 290                 return (old);
 291
 292         if (func(new, &__global_locale) != _LDP_ERROR) {
 293                 (void)strcpy(old, new);
 294                 switch (category) {
 295                 case LC_CTYPE:
 296                         if (__global_locale.__numeric_fp_cvt == LC_NUMERIC_FP_SAME_LOCALE)
 297                                 __global_locale.__numeric_fp_cvt = LC_NUMERIC_FP_UNINITIALIZED;
 298                         break;
 299                 case LC_NUMERIC:
 300                         __global_locale.__numeric_fp_cvt = LC_NUMERIC_FP_UNINITIALIZED;
 301                         XL_RELEASE(__global_locale.__lc_numeric_loc);
 302                         __global_locale.__lc_numeric_loc = NULL;
 303                         break;
 304                 }
 305                 return (old);
 306         }
 307
 308         return (NULL);
 309 }
 310
 311 __private_extern__ const char *
 312 __get_locale_env(category)
 313         int category;
 314 {
 315         const char *env;
 316
 317         /* 1. check LC_ALL. */
 318         env = getenv(categories[0]);
 319
 320         /* 2. check LC_* */
 321         if (env == NULL || !*env)
 322                 env = getenv(categories[category]);
 323
 324         /* 3. check LANG */
 325         if (env == NULL || !*env)
 326                 env = getenv("LANG");
 327
 328         /* 4. if none is set, fall to "C" */
 329         if (env == NULL || !*env)
 330                 env = "C";
 331
 332         return (env);
 333 }
 334
 335 /*
 336  * Detect locale storage location and store its value to _PathLocale variable
 337  */
 338 __private_extern__ int
 339 __detect_path_locale(void)
 340 {
 341         if (_PathLocale == NULL) {
 342                 char *p = getenv("PATH_LOCALE");
 343
 344                 if (p != NULL && !issetugid()) {
 345                         if (strlen(p) + 1/*"/"*/ + ENCODING_LEN +
 346                             1/*"/"*/ + CATEGORY_LEN >= PATH_MAX)
 347                                 return (ENAMETOOLONG);
 348                         _PathLocale = strdup(p);
 349                         if (_PathLocale == NULL)
 350                                 return (errno == 0 ? ENOMEM : errno);
 351                 } else
 352                         _PathLocale = _PATH_LOCALE;
 353         }
 354         return (0);
 355 }
 356