diff options
Diffstat (limited to 'locale/setlocale.c')
| -rw-r--r-- | locale/setlocale.c | 450 |
1 files changed, 227 insertions, 223 deletions
diff --git a/locale/setlocale.c b/locale/setlocale.c index 70ec6eba6e..c0d6fcdc4e 100644 --- a/locale/setlocale.c +++ b/locale/setlocale.c @@ -13,14 +13,17 @@ 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. */ +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ +#include <alloca.h> +#include <argz.h> #include <errno.h> -#include <string.h> -#include <stdlib.h> #include <locale.h> -#include <langinfo.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + #include "localeinfo.h" /* For each category declare two external variables (with weak references): @@ -33,20 +36,19 @@ Cambridge, MA 02139, USA. */ #define DEFINE_CATEGORY(category, category_name, items, a, b, c, d) \ extern const struct locale_data *_nl_current_##category; \ extern const struct locale_data _nl_C_##category; \ -/* XXX The linker is broken so we cannot do the weak symbols right just now. */ -/* weak_symbol (_nl_current_##category) weak_symbol (_nl_C_##category) */ +weak_symbol (_nl_current_##category) weak_symbol (_nl_C_##category) #include "categories.def" #undef DEFINE_CATEGORY /* Array indexed by category of pointers to _nl_current_CATEGORY slots. Elements are zero for categories whose data is never used. */ -const struct locale_data * *const _nl_current[] = -{ +static const struct locale_data * *const _nl_current[] = + { #define DEFINE_CATEGORY(category, category_name, items, a, b, c, d) \ - [category] = &_nl_current_##category, + [category] = &_nl_current_##category, #include "categories.def" #undef DEFINE_CATEGORY -}; + }; /* Array indexed by category of pointers to _nl_C_CATEGORY slots. Elements are zero for categories whose data is never used. */ @@ -67,6 +69,7 @@ const char *const _nl_category_names[] = [category] = category_name, #include "categories.def" #undef DEFINE_CATEGORY + [LC_ALL] = "LC_ALL" }; /* An array of their lengths, for convenience. */ const size_t _nl_category_name_sizes[] = @@ -75,6 +78,7 @@ const size_t _nl_category_name_sizes[] = [category] = sizeof (category_name) - 1, #include "categories.def" #undef DEFINE_CATEGORY + [LC_ALL] = sizeof ("LC_ALL") - 1 }; @@ -98,256 +102,257 @@ void (*const _nl_category_postload[]) (void) = }; +/* Name of our standard locale. */ const char _nl_C_name[] = "C"; /* Name of current locale for each individual category. Each is malloc'd unless it is nl_C_name. */ -const char *_nl_current_names[] = +static const char *_nl_current_names[] = { #define DEFINE_CATEGORY(category, category_name, items, a, b, c, d) \ - _nl_C_name, + [category] = _nl_C_name, #include "categories.def" #undef DEFINE_CATEGORY + [LC_ALL] = _nl_C_name /* For LC_ALL. */ }; -/* Composite LC_ALL name for current locale. - This is malloc'd unless it's _nl_C_name. */ -char *_nl_current_composite_name = (char *) _nl_C_name; -/* 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. */ +/* Use this when we come along an error. */ +#define ERROR_RETURN \ + do { \ + errno = EINVAL; \ + return NULL; \ + } while (0) -char * -setlocale (int category, const char *name) + +static inline char * +clever_copy (const char *string) { - /* Return a malloc'd copy of STRING. */ - char *copy (const char *string) - { - size_t len = strlen (string) + 1; - char *new = malloc (len); - return new ? memcpy (new, string, len) : NULL; - } + size_t len; + char *new; + + if (strcmp (string, "C") == 0 || strcmp (string, "POSIX") == 0) + /* This return is dangerous because the returned string might be + placed in read-only memory. But everything should be set up to + handle this case. */ + return (char *) _nl_C_name; + + len = strlen (string) + 1; + new = (char *) malloc (len); + return new != NULL ? memcpy (new, string, len) : NULL; +} - /* Construct a new composite name. */ - char *new_composite_name (int category, char *newnames[LC_ALL]) - { - size_t lens[LC_ALL], cumlen = 0; - int i; - char *new, *p; - int same = 1; - - for (i = 0; i < LC_ALL; ++i) - { - char *name = (category == LC_ALL ? newnames[i] : - category == i ? newnames[0] : - (char *) _nl_current_names[i]); - lens[i] = strlen (name); - cumlen += _nl_category_name_sizes[i] + 1 + lens[i] + 1; - if (i > 0 && same && strcmp (name, newnames[0])) - same = 0; - } - - if (same) - { - /* All the categories use the same name. */ - new = malloc (lens[0] + 1); - if (! new) - { - if (!strcmp (newnames[0], "C") || !strcmp (newnames[0], "POSIX")) - return (char *) _nl_C_name; - return NULL; - } - memcpy (new, newnames[0], lens[0] + 1); - return new; - } - new = malloc (cumlen); - if (! new) - return NULL; - p = new; - for (i = 0; i < LC_ALL; ++i) - { - /* Add "CATEGORY=NAME;" to the string. */ - char *name = (category == LC_ALL ? newnames[i] : - category == i ? newnames[0] : - (char *) _nl_current_names[i]); - memcpy (p, _nl_category_names[i], _nl_category_name_sizes[i]); - p += _nl_category_name_sizes[i]; - *p++ = '='; - memcpy (p, name, lens[i]); - p += lens[i]; - *p++ = ';'; - } - p[-1] = '\0'; /* Clobber the last ';'. */ - return new; - } - /* Put COMPOSITE in _nl_current_composite_name and free the old value. */ - void setcomposite (char *composite) +/* Construct a new composite name. */ +static inline char * +new_composite_name (int category, char *newnames[LC_ALL]) +{ + size_t last_len; + size_t cumlen = 0; + int i; + char *new, *p; + int same = 1; + + for (i = 0; i < LC_ALL; ++i) { - char *old = _nl_current_composite_name; - _nl_current_composite_name = composite; - if (old != _nl_C_name) - free (old); + char *name = (category == LC_ALL ? newnames[i] : + category == i ? newnames[0] : + (char *) _nl_current_names[i]); + last_len = strlen (name); + cumlen += _nl_category_name_sizes[i] + 1 + last_len + 1; + if (i > 0 && same && strcmp (name, newnames[0]) != 0) + same = 0; } - /* Put NAME in _nl_current_names and free the old value. */ - void setname (int category, const char *name) + + if (same) { - const char *oldname = _nl_current_names[category]; - _nl_current_names[category] = name; - if (oldname != _nl_C_name) - free ((char *) oldname); + /* All the categories use the same name. */ + if (strcmp (newnames[0], "C") == 0 || strcmp (newnames[0], "POSIX") == 0) + return (char *) _nl_C_name; + + new = malloc (last_len + 1); + if (new == NULL) + return NULL; + + memcpy (new, newnames[0], last_len + 1); + return new; } - /* Put DATA in *_nl_current[CATEGORY] and free the old value. */ - void setdata (int category, struct locale_data *data) + + new = malloc (cumlen); + if (new == NULL) + return NULL; + p = new; + for (i = 0; i < LC_ALL; ++i) { - if (_nl_current[category]) - { - const struct locale_data *olddata = *_nl_current[category]; - *_nl_current[category] = data; - if (_nl_category_postload[category]) - (*_nl_category_postload[category]) (); - if (olddata != _nl_C[category]) - _nl_free_locale ((struct locale_data *) olddata); - } + /* Add "CATEGORY=NAME;" to the string. */ + char *name = (category == LC_ALL ? newnames[i] : + category == i ? newnames[0] : + (char *) _nl_current_names[i]); + p = __stpcpy (p, _nl_category_names[i]); + *p++ = '='; + p = __stpcpy (p, name); + *p++ = ';'; } + p[-1] = '\0'; /* Clobber the last ';'. */ + return new; +} - const char *current_name; - char *composite; - if (category < 0 || category > LC_ALL) +/* Put NAME in _nl_current_names. */ +static inline void +setname (int category, const char *name) +{ + if (_nl_current[category] == NULL + && _nl_current_names[category] != _nl_C_name) + free ((void *) _nl_current_names[category]); + + _nl_current_names[category] = name; +} + + +/* Put DATA in *_nl_current[CATEGORY]. */ +static inline void +setdata (int category, const struct locale_data *data) +{ + if (_nl_current[category] != NULL) { - errno = EINVAL; - return NULL; + *_nl_current[category] = data; + if (_nl_category_postload[category]) + (*_nl_category_postload[category]) (); } +} - if (category == LC_ALL) - current_name = _nl_current_composite_name; - else - current_name = _nl_current_names[category]; - if (name == NULL) - /* Return the name of the current locale. */ - return (char *) current_name; +char * +setlocale (int category, const char *locale) +{ + char *locpath_var; + char *locale_path; + size_t locale_path_len; + char *composite; - if (name == current_name) + /* Sanity check for CATEGORY argument. */ + if (category < 0 || category > LC_ALL) + ERROR_RETURN; + + /* Does user want name of current locale? */ + if (locale == NULL) + return (char *) _nl_current_names[category]; + + if (strcmp (locale, _nl_current_names[category]) == 0) /* Changing to the same thing. */ - return (char *) current_name; + return (char *) _nl_current_names[category]; + + /* We perhaps really have to load some data. So we determine the + path in which to look for the data now. But this environment + variable must only be used when the binary has no SUID or SGID + bit set. */ + locale_path = NULL; + locale_path_len = 0; + + locpath_var = getenv ("LOCPATH"); + if (locpath_var != NULL && locpath_var[0] != '\0' + && __getuid () == __geteuid () && __getgid () == __getegid ()) + if (__argz_create_sep (locpath_var, ':', + &locale_path, &locale_path_len) != 0) + return NULL; + if (__argz_append (&locale_path, &locale_path_len, + LOCALE_PATH, sizeof (LOCALE_PATH)) != 0) + return NULL; + if (category == LC_ALL) { - const size_t len = strlen (name) + 1; + /* 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'. */ char *newnames[LC_ALL]; - char *p; - struct locale_data *newdata[LC_ALL]; + const struct locale_data *newdata[LC_ALL]; /* Set all name pointers to the argument name. */ for (category = 0; category < LC_ALL; ++category) - newnames[category] = (char *) name; - - p = strchr (name, ';'); - if (p) + newnames[category] = (char *) locale; + + if (strchr (locale, ';') != NULL) { - /* This is a composite name. Make a local copy and split it up. */ - int i; - char *n = alloca (len); - memcpy (n, name, len); + /* This is a composite name. Make a copy and split it up. */ + char *np = strdupa (locale); + char *cp; + int cnt; - while ((p = strchr (n, '=')) != NULL) + while ((cp = strchr (np, '=')) != NULL) { - for (i = 0; i < LC_ALL; ++i) - if (_nl_category_name_sizes[i] == p - n && - !memcmp (_nl_category_names[i], n, p - n)) + for (cnt = 0; cnt < LC_ALL; ++cnt) + if (cp - np == _nl_category_name_sizes[cnt] + && memcmp (np, _nl_category_names[cnt], cp - np) == 0) break; - if (i == LC_ALL) - { - /* Bogus category name. */ - errno = EINVAL; - return NULL; - } - if (i < LC_ALL) + + if (cnt == LC_ALL) + /* Bogus category name. */ + ERROR_RETURN; + + /* Found the category this clause sets. */ + newnames[cnt] = ++cp; + cp = strchr (cp, ';'); + if (cp != NULL) { - /* Found the category this clause sets. */ - char *end = strchr (++p, ';'); - newnames[i] = p; - if (end) - { - /* Examine the next clause. */ - *end = '\0'; - n = end + 1; - } - else - /* This was the last clause. We are done. */ - break; + /* Examine the next clause. */ + *cp = '\0'; + np = cp + 1; } + else + /* This was the last clause. We are done. */ + break; } - for (i = 0; i < LC_ALL; ++i) - if (newnames[i] == name) + for (cnt = 0; cnt < LC_ALL; ++cnt) + if (newnames[cnt] == locale) /* The composite name did not specify all categories. */ - return NULL; + ERROR_RETURN; } /* Load the new data for each category. */ while (category-- > 0) /* Only actually load the data if anything will use it. */ - if (_nl_current[category]) + if (_nl_current[category] != NULL) { - newdata[category] = _nl_load_locale (category, + newdata[category] = _nl_find_locale (locale_path, locale_path_len, + category, &newnames[category]); - if (newdata[category]) - newnames[category] = copy (newnames[category]); - if (! newdata[category] || ! newnames[category]) + + if (newdata[category] == NULL) { - if (!strcmp (newnames[category], "C") || - !strcmp (newnames[category], "POSIX")) - { - /* Loading from a file failed, but this is a request - for the default locale. Use the built-in data. */ - if (! newdata[category]) - newdata[category] - = (struct locale_data *) _nl_C[category]; - newnames[category] = (char *) _nl_C_name; - } - else - { - /* Loading this part of the locale failed. - Abort the composite load. */ - abort_composite: - while (++category < LC_ALL) - { - if (_nl_current[category]) - _nl_free_locale (newdata[category]); - if (newnames[category] != _nl_C_name) - free (newnames[category]); - } - return NULL; - } + /* Loading this part of the locale failed. Abort the + composite load. */ + int save_errno; + abort_composite: + save_errno = errno; + + while (++category < LC_ALL) + if (_nl_current[category] != NULL) + _nl_free_locale (newdata[category]); + else + if (_nl_current[category] == NULL + && newnames[category] != _nl_C_name) + free (newnames[category]); + + errno = save_errno; + return NULL; } } else { /* The data is never used; just change the name. */ - newnames[category] = copy (newnames[category]); - if (! newnames[category]) - { - if (!strcmp (newnames[category], "C") || - !strcmp (newnames[category], "POSIX")) - newnames[category] = (char *) _nl_C_name; - else - { - while (++category < LC_ALL) - if (newnames[category] != _nl_C_name) - free (newnames[category]); - } - } + newnames[category] = clever_copy (newnames[category]); + if (newnames[category] == NULL) + goto abort_composite; } + /* Create new composite name. */ composite = new_composite_name (LC_ALL, newnames); - if (! composite) + if (composite == NULL) { category = -1; goto abort_composite; @@ -359,46 +364,45 @@ setlocale (int category, const char *name) setdata (category, newdata[category]); setname (category, newnames[category]); } - setcomposite (composite); + setname (LC_ALL, composite); return composite; } else { - char *newname = copy (name); - if (! newname) + const struct locale_data *newdata; + char *newname; + + if (_nl_current[category] != NULL) { - if (!strcmp (name, "C") || !strcmp (name, "POSIX")) - newname = (char *) _nl_C_name; - else + /* Only actually load the data if anything will use it. */ + newname = (char *) locale; + newdata = _nl_find_locale (locale_path, locale_path_len, category, + (char **) &newname); + if (newdata == NULL) return NULL; } + /* Create new composite name. */ composite = new_composite_name (category, &newname); - if (! composite) + if (composite == NULL) { - if (newname != _nl_C_name) - free (newname); + /* If anything went wrong free what we managed to allocate + so far. */ + int save_errno = errno; + + if (_nl_current[category] != NULL) + _nl_free_locale (newdata); + + errno = save_errno; return NULL; } - /* Only actually load the data if anything will use it. */ - if (_nl_current[category]) - { - struct locale_data *newdata = _nl_load_locale (category, - (char **) &name); - if (! newdata) - { - if (!strcmp (name, "C") || !strcmp (name, "POSIX")) - newdata = (struct locale_data *) _nl_C[category]; - else - return NULL; - } - setdata (category, newdata); - } + if (_nl_current[category] != NULL) + setdata (category, newdata); setname (category, newname); - setcomposite (composite); + setname (LC_ALL, composite); return newname; } |