-/* Copyright (C) 1991, 1992 Free Software Foundation, Inc.
-This file is part of the GNU C Library.
-
-The GNU C Library is free software; you can redistribute it and/or
-modify it under the terms of the GNU Library General Public License as
-published by the Free Software Foundation; either version 2 of the
-License, or (at your option) any later version.
-
-The GNU C Library is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-Library General Public License for more details.
-
-You should have received a copy of the GNU Library General Public
-License along with the GNU C Library; see the file COPYING.LIB. If
-not, write to the Free Software Foundation, Inc., 675 Mass Ave,
-Cambridge, MA 02139, USA. */
-
-#include <ansidecl.h>
-#include <localeinfo.h>
+/* Copyright (C) 1991-2024 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <alloca.h>
+#include <argz.h>
#include <errno.h>
+#include <libc-lock.h>
#include <locale.h>
+#include <stdlib.h>
#include <string.h>
+#include <unistd.h>
+
+#include "localeinfo.h"
+
+#ifdef NL_CURRENT_INDIRECT
+
+/* For each category declare a special external symbol
+ _nl_current_CATEGORY_used with a weak reference.
+ This symbol will is defined in lc-CATEGORY.c and will be linked in
+ if anything uses _nl_current_CATEGORY (also defined in that module).
+ Also use a weak reference for the _nl_current_CATEGORY thread variable. */
+
+# define DEFINE_CATEGORY(category, category_name, items, a) \
+ extern char _nl_current_##category##_used; \
+ weak_extern (_nl_current_##category##_used) \
+ weak_extern (_nl_current_##category)
+# include "categories.def"
+# undef DEFINE_CATEGORY
+
+/* Now define a table of flags based on those special weak symbols' values.
+ _nl_current_used[CATEGORY] will be zero if _nl_current_CATEGORY is not
+ linked in. */
+static char *const _nl_current_used[] =
+ {
+# define DEFINE_CATEGORY(category, category_name, items, a) \
+ [category] = &_nl_current_##category##_used,
+# include "categories.def"
+# undef DEFINE_CATEGORY
+ };
+
+# define CATEGORY_USED(category) (_nl_current_used[category] != 0)
+
+#else
+
+/* The shared library always loads all the categories,
+ and the current global settings are kept in _nl_global_locale. */
+
+# define CATEGORY_USED(category) (1)
+
+#endif
+
+
+/* Define an array of category names (also the environment variable names). */
+const struct catnamestr_t _nl_category_names attribute_hidden =
+ {
+#define DEFINE_CATEGORY(category, category_name, items, a) \
+ category_name,
+#include "categories.def"
+#undef DEFINE_CATEGORY
+ };
+
+const uint8_t _nl_category_name_idxs[__LC_LAST] attribute_hidden =
+ {
+#define DEFINE_CATEGORY(category, category_name, items, a) \
+ [category] = offsetof (struct catnamestr_t, CATNAMEMF (__LINE__)),
+#include "categories.def"
+#undef DEFINE_CATEGORY
+ };
+
+/* An array of their lengths, for convenience. */
+const uint8_t _nl_category_name_sizes[] attribute_hidden =
+ {
+#define DEFINE_CATEGORY(category, category_name, items, a) \
+ [category] = sizeof (category_name) - 1,
+#include "categories.def"
+#undef DEFINE_CATEGORY
+ [LC_ALL] = sizeof ("LC_ALL") - 1
+ };
+
+
+#ifdef NL_CURRENT_INDIRECT
+# define WEAK_POSTLOAD(postload) weak_extern (postload)
+#else
+# define WEAK_POSTLOAD(postload) /* Need strong refs in static linking. */
+#endif
+
+/* Declare the postload functions used below. */
+#undef NO_POSTLOAD
+#define NO_POSTLOAD _nl_postload_ctype /* Harmless thing known to exist. */
+#define DEFINE_CATEGORY(category, category_name, items, postload) \
+extern void postload (void); WEAK_POSTLOAD (postload)
+#include "categories.def"
+#undef DEFINE_CATEGORY
+#undef NO_POSTLOAD
+
+/* Define an array indexed by category of postload functions to call after
+ loading and installing that category's data. */
+static void (*const _nl_category_postload[]) (void) =
+ {
+#define DEFINE_CATEGORY(category, category_name, items, postload) \
+ [category] = postload,
+#include "categories.def"
+#undef DEFINE_CATEGORY
+ };
-/* Switch to the locale called NAME in CATEGORY.
- Return a string describing the locale. This string can
- be used as the NAME argument in a later call.
- If NAME is NULL, don't switch locales, but return the current one.
- If NAME is "", switch to a locale based on the environment variables,
- as per POSIX. Return NULL on error. */
+/* Lock for protecting global data. */
+__libc_rwlock_define_initialized (, __libc_setlocale_lock attribute_hidden)
+
+/* Defined in loadmsgcat.c. */
+extern int _nl_msg_cat_cntr;
+
+
+/* Use this when we come along an error. */
+#define ERROR_RETURN \
+ do { \
+ __set_errno (EINVAL); \
+ return NULL; \
+ } while (0)
+
+
+/* Construct a new composite name. */
+static char *
+new_composite_name (int category, const char **newnames)
+{
+ size_t last_len = 0;
+ size_t cumlen = 0;
+ int i;
+ char *new, *p;
+ int same = 1;
+
+ for (i = 0; i < __LC_LAST; ++i)
+ if (i != LC_ALL)
+ {
+ const char *name = (category == LC_ALL ? newnames[i]
+ : category == i ? newnames[0]
+ : _nl_global_locale.__names[i]);
+ last_len = strlen (name);
+ cumlen += _nl_category_name_sizes[i] + 1 + last_len + 1;
+ if (same && name != newnames[0] && strcmp (name, newnames[0]) != 0)
+ same = 0;
+ }
+
+ if (same)
+ {
+ /* All the categories use the same name. */
+ if (strcmp (newnames[0], _nl_C_name) == 0
+ || strcmp (newnames[0], _nl_POSIX_name) == 0)
+ return (char *) _nl_C_name;
+
+ new = malloc (last_len + 1);
+
+ return new == NULL ? NULL : memcpy (new, newnames[0], last_len + 1);
+ }
+
+ new = malloc (cumlen);
+ if (new == NULL)
+ return NULL;
+ p = new;
+ for (i = 0; i < __LC_LAST; ++i)
+ if (i != LC_ALL)
+ {
+ /* Add "CATEGORY=NAME;" to the string. */
+ const char *name = (category == LC_ALL ? newnames[i]
+ : category == i ? newnames[0]
+ : _nl_global_locale.__names[i]);
+ p = __stpcpy (p, _nl_category_names_get (i));
+ *p++ = '=';
+ p = __stpcpy (p, name);
+ *p++ = ';';
+ }
+ p[-1] = '\0'; /* Clobber the last ';'. */
+ return new;
+}
+
+
+/* Put NAME in _nl_global_locale.__names. */
+static void
+setname (int category, const char *name)
+{
+ if (_nl_global_locale.__names[category] == name)
+ return;
+
+ if (_nl_global_locale.__names[category] != _nl_C_name)
+ free ((char *) _nl_global_locale.__names[category]);
+
+ _nl_global_locale.__names[category] = name;
+}
+
+/* Put DATA in *_nl_current[CATEGORY]. */
+static void
+setdata (int category, struct __locale_data *data)
+{
+ if (CATEGORY_USED (category))
+ {
+ _nl_global_locale.__locales[category] = data;
+ if (_nl_category_postload[category])
+ (*_nl_category_postload[category]) ();
+ }
+}
+
char *
-DEFUN(setlocale, (category, name), int category AND CONST char *name)
+setlocale (int category, const char *locale)
+{
+ char *locale_path;
+ size_t locale_path_len;
+ const char *locpath_var;
+ char *composite;
+
+ /* Sanity check for CATEGORY argument. */
+ if (__builtin_expect (category, 0) < 0
+ || __builtin_expect (category, 0) >= __LC_LAST)
+ ERROR_RETURN;
+
+ /* Does user want name of current locale? */
+ if (locale == NULL)
+ return (char *) _nl_global_locale.__names[category];
+
+ /* Protect global data. */
+ __libc_rwlock_wrlock (__libc_setlocale_lock);
+
+ if (strcmp (locale, _nl_global_locale.__names[category]) == 0)
+ {
+ /* Changing to the same thing. */
+ __libc_rwlock_unlock (__libc_setlocale_lock);
+
+ return (char *) _nl_global_locale.__names[category];
+ }
+
+ /* We perhaps really have to load some data. So we determine the
+ path in which to look for the data now. The environment variable
+ `LOCPATH' must only be used when the binary has no SUID or SGID
+ bit set. If using the default path, we tell _nl_find_locale
+ by passing null and it can check the canonical locale archive. */
+ locale_path = NULL;
+ locale_path_len = 0;
+
+ locpath_var = getenv ("LOCPATH");
+ if (locpath_var != NULL && locpath_var[0] != '\0')
+ {
+ if (__argz_create_sep (locpath_var, ':',
+ &locale_path, &locale_path_len) != 0
+ || __argz_add_sep (&locale_path, &locale_path_len,
+ _nl_default_locale_path, ':') != 0)
+ {
+ __libc_rwlock_unlock (__libc_setlocale_lock);
+ return NULL;
+ }
+ }
+
+ if (category == LC_ALL)
+ {
+ /* The user wants to set all categories. The desired locales
+ for the individual categories can be selected by using a
+ composite locale name. This is a semi-colon separated list
+ of entries of the form `CATEGORY=VALUE'. */
+ const char *newnames[__LC_LAST];
+ struct __locale_data *newdata[__LC_LAST];
+ /* Copy of the locale argument, for in-place splitting. */
+ char *locale_copy = NULL;
+
+ /* Set all name pointers to the argument name. */
+ for (category = 0; category < __LC_LAST; ++category)
+ if (category != LC_ALL)
+ newnames[category] = (char *) locale;
+
+ if (__glibc_unlikely (strchr (locale, ';') != NULL))
+ {
+ /* This is a composite name. Make a copy and split it up. */
+ locale_copy = __strdup (locale);
+ if (__glibc_unlikely (locale_copy == NULL))
+ {
+ __libc_rwlock_unlock (__libc_setlocale_lock);
+ return NULL;
+ }
+ char *np = locale_copy;
+ char *cp;
+ int cnt;
+
+ while ((cp = strchr (np, '=')) != NULL)
+ {
+ for (cnt = 0; cnt < __LC_LAST; ++cnt)
+ if (cnt != LC_ALL
+ && (size_t) (cp - np) == _nl_category_name_sizes[cnt]
+ && (memcmp (np, (_nl_category_names_get (cnt)), cp - np)
+ == 0))
+ break;
+
+ if (cnt == __LC_LAST)
+ {
+ error_return:
+ __libc_rwlock_unlock (__libc_setlocale_lock);
+ free (locale_copy);
+
+ /* Bogus category name. */
+ ERROR_RETURN;
+ }
+
+ /* Found the category this clause sets. */
+ newnames[cnt] = ++cp;
+ cp = strchr (cp, ';');
+ if (cp != NULL)
+ {
+ /* Examine the next clause. */
+ *cp = '\0';
+ np = cp + 1;
+ }
+ else
+ /* This was the last clause. We are done. */
+ break;
+ }
+
+ for (cnt = 0; cnt < __LC_LAST; ++cnt)
+ if (cnt != LC_ALL && newnames[cnt] == locale)
+ /* The composite name did not specify all categories. */
+ goto error_return;
+ }
+
+ /* Load the new data for each category. */
+ while (category-- > 0)
+ if (category != LC_ALL)
+ {
+ newdata[category] = _nl_find_locale (locale_path, locale_path_len,
+ category,
+ &newnames[category]);
+
+ if (newdata[category] == NULL)
+ {
+#ifdef NL_CURRENT_INDIRECT
+ if (newnames[category] == _nl_C_name)
+ /* Null because it's the weak value of _nl_C_LC_FOO. */
+ continue;
+#endif
+ break;
+ }
+
+ /* We must not simply free a global locale since we have
+ no control over the usage. So we mark it as
+ un-deletable. And yes, the 'if' is needed, the data
+ might be in read-only memory. */
+ if (newdata[category]->usage_count != UNDELETABLE)
+ newdata[category]->usage_count = UNDELETABLE;
+
+ /* Make a copy of locale name. */
+ if (newnames[category] != _nl_C_name)
+ {
+ if (strcmp (newnames[category],
+ _nl_global_locale.__names[category]) == 0)
+ newnames[category] = _nl_global_locale.__names[category];
+ else
+ {
+ newnames[category] = __strdup (newnames[category]);
+ if (newnames[category] == NULL)
+ break;
+ }
+ }
+ }
+
+ /* Create new composite name. */
+ composite = (category >= 0
+ ? NULL : new_composite_name (LC_ALL, newnames));
+ if (composite != NULL)
+ {
+ /* Now we have loaded all the new data. Put it in place. */
+ for (category = 0; category < __LC_LAST; ++category)
+ if (category != LC_ALL)
+ {
+ setdata (category, newdata[category]);
+ setname (category, newnames[category]);
+ }
+ setname (LC_ALL, composite);
+
+ /* We successfully loaded a new locale. Let the message catalog
+ functions know about this. */
+ ++_nl_msg_cat_cntr;
+ }
+ else
+ for (++category; category < __LC_LAST; ++category)
+ if (category != LC_ALL && newnames[category] != _nl_C_name
+ && newnames[category] != _nl_global_locale.__names[category])
+ free ((char *) newnames[category]);
+
+ /* Critical section left. */
+ __libc_rwlock_unlock (__libc_setlocale_lock);
+
+ /* Free the resources. */
+ free (locale_path);
+ free (locale_copy);
+
+ return composite;
+ }
+ else
+ {
+ struct __locale_data *newdata = NULL;
+ const char *newname[1] = { locale };
+
+ if (CATEGORY_USED (category))
+ {
+ /* Only actually load the data if anything will use it. */
+ newdata = _nl_find_locale (locale_path, locale_path_len, category,
+ &newname[0]);
+ if (newdata == NULL)
+ goto abort_single;
+
+ /* We must not simply free a global locale since we have no
+ control over the usage. So we mark it as un-deletable.
+
+ Note: do not remove the `if', it's necessary to cope with
+ the builtin locale data. */
+ if (newdata->usage_count != UNDELETABLE)
+ newdata->usage_count = UNDELETABLE;
+ }
+
+ /* Make a copy of locale name. */
+ if (newname[0] != _nl_C_name)
+ {
+ newname[0] = __strdup (newname[0]);
+ if (newname[0] == NULL)
+ goto abort_single;
+ }
+
+ /* Create new composite name. */
+ composite = new_composite_name (category, newname);
+ if (composite == NULL)
+ {
+ if (newname[0] != _nl_C_name)
+ free ((char *) newname[0]);
+
+ /* Say that we don't have any data loaded. */
+ abort_single:
+ newname[0] = NULL;
+ }
+ else
+ {
+ if (CATEGORY_USED (category))
+ setdata (category, newdata);
+
+ setname (category, newname[0]);
+ setname (LC_ALL, composite);
+
+ /* We successfully loaded a new locale. Let the message catalog
+ functions know about this. */
+ ++_nl_msg_cat_cntr;
+ }
+
+ /* Critical section left. */
+ __libc_rwlock_unlock (__libc_setlocale_lock);
+
+ /* Free the resources (the locale path variable. */
+ free (locale_path);
+
+ return (char *) newname[0];
+ }
+}
+libc_hidden_def (setlocale)
+
+static void
+free_category (int category,
+ struct __locale_data *here, struct __locale_data *c_data)
+{
+ struct loaded_l10nfile *runp = _nl_locale_file_list[category];
+
+ /* If this category is already "C" don't do anything. */
+ if (here != c_data)
+ {
+ /* We have to be prepared that sometime later we still
+ might need the locale information. */
+ setdata (category, c_data);
+ setname (category, _nl_C_name);
+ }
+
+ while (runp != NULL)
+ {
+ struct loaded_l10nfile *curr = runp;
+ struct __locale_data *data = (struct __locale_data *) runp->data;
+
+ if (data != NULL && data != c_data)
+ _nl_unload_locale (category, data);
+ runp = runp->next;
+ free ((char *) curr->filename);
+ free (curr);
+ }
+}
+
+/* This is called from iconv/gconv_db.c's free_mem, as locales must
+ be freed before freeing gconv steps arrays. */
+void
+_nl_locale_subfreeres (void)
{
- /* Braindead implementation until I finish the fancy one. */
+#ifdef NL_CURRENT_INDIRECT
+ /* We don't use the loop because we want to have individual weak
+ symbol references here. */
+# define DEFINE_CATEGORY(category, category_name, items, a) \
+ if (CATEGORY_USED (category)) \
+ { \
+ extern struct __locale_data _nl_C_##category; \
+ weak_extern (_nl_C_##category) \
+ free_category (category, *_nl_current_##category, &_nl_C_##category); \
+ }
+# include "categories.def"
+# undef DEFINE_CATEGORY
+#else
+ int category;
- if (name == NULL || name[0] == '\0')
- return (char *) "C";
+ for (category = 0; category < __LC_LAST; ++category)
+ if (category != LC_ALL)
+ free_category (category, _NL_CURRENT_DATA (category),
+ _nl_C_locobj.__locales[category]);
+#endif
- if (!strcmp(name, "C") || !strcmp(name, "POSIX"))
- return (char *) name;
+ setname (LC_ALL, _nl_C_name);
- errno = EINVAL;
- return NULL;
+ /* This frees the data structures associated with the locale archive.
+ The locales from the archive are not in the file list, so we have
+ not called _nl_unload_locale on them above. */
+ _nl_archive_subfreeres ();
}
projects / thirdparty / glibc.git / blobdiff