/* Functions to read locale data files. Copyright (C) 1996-2001, 2002, 2003, 2004 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. 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, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #include <assert.h> #include <errno.h> #include <fcntl.h> #include <locale.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #ifdef _POSIX_MAPPED_FILES # include <sys/mman.h> #endif #include <sys/stat.h> #include <not-cancel.h> #include "localeinfo.h" static const size_t _nl_category_num_items[] = { #define DEFINE_CATEGORY(category, category_name, items, a) \ [category] = _NL_ITEM_INDEX (_NL_NUM_##category), #include "categories.def" #undef DEFINE_CATEGORY }; #define NO_PAREN(arg, rest...) arg, ##rest #define DEFINE_CATEGORY(category, category_name, items, a) \ static const enum value_type _nl_value_type_##category[] = { NO_PAREN items }; #define DEFINE_ELEMENT(element, element_name, optstd, type, rest...) \ [_NL_ITEM_INDEX (element)] = type, #include "categories.def" #undef DEFINE_CATEGORY static const enum value_type *_nl_value_types[] = { #define DEFINE_CATEGORY(category, category_name, items, a) \ [category] = _nl_value_type_##category, #include "categories.def" #undef DEFINE_CATEGORY }; struct locale_data * internal_function _nl_intern_locale_data (int category, const void *data, size_t datasize) { const struct { unsigned int magic; unsigned int nstrings; unsigned int strindex[0]; } *const filedata = data; struct locale_data *newdata; size_t cnt; if (__builtin_expect (datasize < sizeof *filedata, 0) || __builtin_expect (filedata->magic != LIMAGIC (category), 0)) { /* Bad data file. */ __set_errno (EINVAL); return NULL; } if (__builtin_expect (filedata->nstrings < _nl_category_num_items[category], 0) || (__builtin_expect (sizeof *filedata + filedata->nstrings * sizeof (unsigned int) >= datasize, 0))) { /* Insufficient data. */ __set_errno (EINVAL); return NULL; } newdata = malloc (sizeof *newdata + filedata->nstrings * sizeof (union locale_data_value)); if (newdata == NULL) return NULL; newdata->filedata = (void *) filedata; newdata->filesize = datasize; newdata->private.data = NULL; newdata->private.cleanup = NULL; newdata->usage_count = 0; newdata->use_translit = 0; newdata->nstrings = filedata->nstrings; for (cnt = 0; cnt < newdata->nstrings; ++cnt) { size_t idx = filedata->strindex[cnt]; if (__builtin_expect (idx > (size_t) newdata->filesize, 0)) { puntdata: free (newdata); __set_errno (EINVAL); return NULL; } /* Determine the type. There is one special case: the LC_CTYPE category can have more elements than there are in the _nl_value_type_LC_XYZ array. There are all pointers. */ switch (category) { #define CATTEST(cat) \ case LC_##cat: \ assert (cnt < (sizeof (_nl_value_type_LC_##cat) \ / sizeof (_nl_value_type_LC_##cat[0]))); \ break CATTEST (NUMERIC); CATTEST (TIME); CATTEST (COLLATE); CATTEST (MONETARY); CATTEST (MESSAGES); CATTEST (PAPER); CATTEST (NAME); CATTEST (ADDRESS); CATTEST (TELEPHONE); CATTEST (MEASUREMENT); CATTEST (IDENTIFICATION); default: assert (category == LC_CTYPE); break; } if ((category == LC_CTYPE && cnt >= (sizeof (_nl_value_type_LC_CTYPE) / sizeof (_nl_value_type_LC_CTYPE[0]))) || __builtin_expect (_nl_value_types[category][cnt] != word, 1)) newdata->values[cnt].string = newdata->filedata + idx; else { if (idx % __alignof__ (u_int32_t) != 0) goto puntdata; newdata->values[cnt].word = *((const u_int32_t *) (newdata->filedata + idx)); } } return newdata; } void internal_function _nl_load_locale (struct loaded_l10nfile *file, int category) { int fd; void *filedata; struct stat64 st; struct locale_data *newdata; int save_err; int alloc = ld_mapped; file->decided = 1; file->data = NULL; fd = open_not_cancel_2 (file->filename, O_RDONLY); if (__builtin_expect (fd, 0) < 0) /* Cannot open the file. */ return; if (__builtin_expect (__fxstat64 (_STAT_VER, fd, &st), 0) < 0) { puntfd: close_not_cancel_no_status (fd); return; } if (__builtin_expect (S_ISDIR (st.st_mode), 0)) { /* LOCALE/LC_foo is a directory; open LOCALE/LC_foo/SYS_LC_foo instead. */ char *newp; size_t filenamelen; close_not_cancel_no_status (fd); filenamelen = strlen (file->filename); newp = (char *) alloca (filenamelen + 5 + _nl_category_name_sizes[category] + 1); __mempcpy (__mempcpy (__mempcpy (newp, file->filename, filenamelen), "/SYS_", 5), _nl_category_names[category], _nl_category_name_sizes[category] + 1); fd = open_not_cancel_2 (newp, O_RDONLY); if (__builtin_expect (fd, 0) < 0) return; if (__builtin_expect (__fxstat64 (_STAT_VER, fd, &st), 0) < 0) goto puntfd; } /* Map in the file's data. */ save_err = errno; #ifdef _POSIX_MAPPED_FILES # ifndef MAP_COPY /* Linux seems to lack read-only copy-on-write. */ # define MAP_COPY MAP_PRIVATE # endif # ifndef MAP_FILE /* Some systems do not have this flag; it is superfluous. */ # define MAP_FILE 0 # endif filedata = __mmap ((caddr_t) 0, st.st_size, PROT_READ, MAP_FILE|MAP_COPY, fd, 0); if (__builtin_expect (filedata == MAP_FAILED, 0)) { if (__builtin_expect (errno, ENOSYS) == ENOSYS) { #endif /* _POSIX_MAPPED_FILES */ /* No mmap; allocate a buffer and read from the file. */ alloc = ld_malloced; filedata = malloc (st.st_size); if (filedata != NULL) { off_t to_read = st.st_size; ssize_t nread; char *p = (char *) filedata; while (to_read > 0) { nread = read_not_cancel (fd, p, to_read); if (__builtin_expect (nread, 1) <= 0) { free (filedata); if (nread == 0) __set_errno (EINVAL); /* Bizarreness going on. */ goto puntfd; } p += nread; to_read -= nread; } __set_errno (save_err); } #ifdef _POSIX_MAPPED_FILES } } #endif /* _POSIX_MAPPED_FILES */ /* We have mapped the data, so we no longer need the descriptor. */ close_not_cancel_no_status (fd); if (__builtin_expect (filedata == NULL, 0)) /* We failed to map or read the data. */ return; newdata = _nl_intern_locale_data (category, filedata, st.st_size); if (__builtin_expect (newdata == NULL, 0)) /* Bad data. */ { #ifdef _POSIX_MAPPED_FILES if (alloc == ld_mapped) __munmap ((caddr_t) filedata, st.st_size); #endif return; } /* _nl_intern_locale_data leaves us these fields to initialize. */ newdata->name = NULL; /* This will be filled if necessary in findlocale.c. */ newdata->alloc = alloc; file->data = newdata; } void internal_function _nl_unload_locale (struct locale_data *locale) { if (locale->private.cleanup) (*locale->private.cleanup) (locale); switch (__builtin_expect (locale->alloc, ld_mapped)) { case ld_malloced: free ((void *) locale->filedata); break; case ld_mapped: #ifdef _POSIX_MAPPED_FILES __munmap ((caddr_t) locale->filedata, locale->filesize); break; #endif case ld_archive: /* Nothing to do. */ break; } if (__builtin_expect (locale->alloc, ld_mapped) != ld_archive) free ((char *) locale->name); free (locale); }