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 char *
 107 setlocale(category, locale)
 108         int category;
 109         const char *locale;
 110 {
 111         int i, j, len, saverr, save__numeric_fp_cvt;
 112         const char *env, *r;
 113         locale_t save__lc_numeric_loc;
 114
 115         if (category < LC_ALL || category >= _LC_LAST) {
 116                 errno = EINVAL;
 117                 return (NULL);
 118         }
 119
 120         if (locale == NULL)
 121                 return (category != LC_ALL ?
 122                     current_categories[category] : currentlocale());
 123
 124         /*
 125          * Default to the current locale for everything.
 126          */
 127         for (i = 1; i < _LC_LAST; ++i)
 128                 (void)strcpy(new_categories[i], current_categories[i]);
 129
 130         /*
 131          * Now go fill up new_categories from the locale argument
 132          */
 133         if (!*locale) {
 134                 if (category == LC_ALL) {
 135                         for (i = 1; i < _LC_LAST; ++i) {
 136                                 env = __get_locale_env(i);
 137                                 if (strlen(env) > ENCODING_LEN) {
 138                                         errno = EINVAL;
 139                                         return (NULL);
 140                                 }
 141                                 (void)strcpy(new_categories[i], env);
 142                         }
 143                 } else {
 144                         env = __get_locale_env(category);
 145                         if (strlen(env) > ENCODING_LEN) {
 146                                 errno = EINVAL;
 147                                 return (NULL);
 148                         }
 149                         (void)strcpy(new_categories[category], env);
 150                 }
 151         } else if (category != LC_ALL) {
 152                 if (strlen(locale) > ENCODING_LEN) {
 153                         errno = EINVAL;
 154                         return (NULL);
 155                 }
 156                 (void)strcpy(new_categories[category], locale);
 157         } else {
 158                 if ((r = strchr(locale, '/')) == NULL) {
 159                         if (strlen(locale) > ENCODING_LEN) {
 160                                 errno = EINVAL;
 161                                 return (NULL);
 162                         }
 163                         for (i = 1; i < _LC_LAST; ++i)
 164                                 (void)strcpy(new_categories[i], locale);
 165                 } else {
 166                         for (i = 1; r[1] == '/'; ++r)
 167                                 ;
 168                         if (!r[1]) {
 169                                 errno = EINVAL;
 170                                 return (NULL);  /* Hmm, just slashes... */
 171                         }
 172                         do {
 173                                 if (i == _LC_LAST)
 174                                         break;  /* Too many slashes... */
 175                                 if ((len = r - locale) > ENCODING_LEN) {
 176                                         errno = EINVAL;
 177                                         return (NULL);
 178                                 }
 179                                 (void)strlcpy(new_categories[i], locale,
 180                                               len + 1);
 181                                 i++;
 182                                 while (*r == '/')
 183                                         r++;
 184                                 locale = r;
 185                                 while (*r && *r != '/')
 186                                         r++;
 187                         } while (*locale);
 188                         while (i < _LC_LAST) {
 189                                 (void)strcpy(new_categories[i],
 190                                              new_categories[i-1]);
 191                                 i++;
 192                         }
 193                 }
 194         }
 195
 196         if (category != LC_ALL)
 197                 return (loadlocale(category));
 198
 199         save__numeric_fp_cvt = __global_locale.__numeric_fp_cvt;
 200         save__lc_numeric_loc = __global_locale.__lc_numeric_loc;
 201         XL_RETAIN(save__lc_numeric_loc);
 202         for (i = 1; i < _LC_LAST; ++i) {
 203                 (void)strcpy(saved_categories[i], current_categories[i]);
 204                 if (loadlocale(i) == NULL) {
 205                         saverr = errno;
 206                         for (j = 1; j < i; j++) {
 207                                 (void)strcpy(new_categories[j],
 208                                              saved_categories[j]);
 209                                 if (loadlocale(j) == NULL) {
 210                                         (void)strcpy(new_categories[j], "C");
 211                                         (void)loadlocale(j);
 212                                 }
 213                         }
 214                         __global_locale.__numeric_fp_cvt = save__numeric_fp_cvt;
 215                         __global_locale.__lc_numeric_loc = save__lc_numeric_loc;
 216                         XL_RELEASE(save__lc_numeric_loc);
 217                         errno = saverr;
 218                         return (NULL);
 219                 }
 220         }
 221         XL_RELEASE(save__lc_numeric_loc);
 222         return (currentlocale());
 223 }
 224
 225 static char *
 226 currentlocale()
 227 {
 228         int i;
 229
 230         (void)strcpy(current_locale_string, current_categories[1]);
 231
 232         for (i = 2; i < _LC_LAST; ++i)
 233                 if (strcmp(current_categories[1], current_categories[i])) {
 234                         for (i = 2; i < _LC_LAST; ++i) {
 235                                 (void)strcat(current_locale_string, "/");
 236                                 (void)strcat(current_locale_string,
 237                                              current_categories[i]);
 238                         }
 239                         break;
 240                 }
 241         return (current_locale_string);
 242 }
 243
 244 static char *
 245 loadlocale(category)
 246         int category;
 247 {
 248         char *new = new_categories[category];
 249         char *old = current_categories[category];
 250         int (*func)(const char *, locale_t);
 251         int saved_errno;
 252
 253         if ((new[0] == '.' &&
 254              (new[1] == '\0' || (new[1] == '.' && new[2] == '\0'))) ||
 255             strchr(new, '/') != NULL) {
 256                 errno = EINVAL;
 257                 return (NULL);
 258         }
 259
 260         saved_errno = errno;
 261         errno = __detect_path_locale();
 262         if (errno != 0)
 263                 return (NULL);
 264         errno = saved_errno;
 265
 266         switch (category) {
 267         case LC_CTYPE:
 268                 func = __wrap_setrunelocale;
 269                 break;
 270         case LC_COLLATE:
 271                 func = __collate_load_tables;
 272                 break;
 273         case LC_TIME:
 274                 func = __time_load_locale;
 275                 break;
 276         case LC_NUMERIC:
 277                 func = __numeric_load_locale;
 278                 break;
 279         case LC_MONETARY:
 280                 func = __monetary_load_locale;
 281                 break;
 282         case LC_MESSAGES:
 283                 func = __messages_load_locale;
 284                 break;
 285         default:
 286                 errno = EINVAL;
 287                 return (NULL);
 288         }
 289
 290         if (strcmp(new, old) == 0)
 291                 return (old);
 292
 293         if (func(new, &__global_locale) != _LDP_ERROR) {
 294                 (void)strcpy(old, new);
 295                 switch (category) {
 296                 case LC_CTYPE:
 297                         if (__global_locale.__numeric_fp_cvt == LC_NUMERIC_FP_SAME_LOCALE)
 298                                 __global_locale.__numeric_fp_cvt = LC_NUMERIC_FP_UNINITIALIZED;
 299                         break;
 300                 case LC_NUMERIC:
 301                         __global_locale.__numeric_fp_cvt = LC_NUMERIC_FP_UNINITIALIZED;
 302                         XL_RELEASE(__global_locale.__lc_numeric_loc);
 303                         __global_locale.__lc_numeric_loc = NULL;
 304                         break;
 305                 }
 306                 return (old);
 307         }
 308
 309         return (NULL);
 310 }
 311
 312 __private_extern__ const char *
 313 __get_locale_env(category)
 314         int category;
 315 {
 316         const char *env;
 317
 318         /* 1. check LC_ALL. */
 319         env = getenv(categories[0]);
 320
 321         /* 2. check LC_* */
 322         if (env == NULL || !*env)
 323                 env = getenv(categories[category]);
 324
 325         /* 3. check LANG */
 326         if (env == NULL || !*env)
 327                 env = getenv("LANG");
 328
 329         /* 4. if none is set, fall to "C" */
 330         if (env == NULL || !*env)
 331                 env = "C";
 332
 333         return (env);
 334 }
 335
 336 /*
 337  * Detect locale storage location and store its value to _PathLocale variable
 338  */
 339 __private_extern__ int
 340 __detect_path_locale(void)
 341 {
 342         if (_PathLocale == NULL) {
 343                 char *p = getenv("PATH_LOCALE");
 344
 345                 if (p != NULL && !issetugid()) {
 346                         if (strlen(p) + 1/*"/"*/ + ENCODING_LEN +
 347                             1/*"/"*/ + CATEGORY_LEN >= PATH_MAX)
 348                                 return (ENAMETOOLONG);
 349                         _PathLocale = strdup(p);
 350                         if (_PathLocale == NULL)
 351                                 return (errno == 0 ? ENOMEM : errno);
 352                 } else
 353                         _PathLocale = _PATH_LOCALE;
 354         }
 355         return (0);
 356 }
 357