/* Functions to read locale data files.
- Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
+ Copyright (C) 1996-2017 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 Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
+ 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
- Library General Public License for more details.
+ Lesser 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., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+#include <assert.h>
#include <errno.h>
#include <fcntl.h>
+#include <locale.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
-#include <sys/mman.h>
+#ifdef _POSIX_MAPPED_FILES
+# include <sys/mman.h>
+#endif
#include <sys/stat.h>
+#include <not-cancel.h>
#include "localeinfo.h"
#include "categories.def"
#undef DEFINE_CATEGORY
-static const enum value_type *_nl_value_types[] =
+static const enum value_type *const _nl_value_types[] =
{
#define DEFINE_CATEGORY(category, category_name, items, a) \
[category] = _nl_value_type_##category,
};
-void
-_nl_load_locale (struct loaded_l10nfile *file, int category)
+struct __locale_data *
+internal_function
+_nl_intern_locale_data (int category, const void *data, size_t datasize)
{
- int fd;
- struct
+ const struct
{
unsigned int magic;
unsigned int nstrings;
unsigned int strindex[0];
- } *filedata;
- struct stat st;
- struct locale_data *newdata;
- int save_err;
- int mmaped = 1;
+ } *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 (__glibc_unlikely (idx > (size_t) newdata->filesize))
+ {
+ 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: \
+ if (cnt >= (sizeof (_nl_value_type_LC_##cat) \
+ / sizeof (_nl_value_type_LC_##cat[0]))) \
+ goto puntdata; \
+ 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 (!LOCFILE_ALIGNED_P (idx))
+ goto puntdata;
+ newdata->values[cnt].word =
+ *((const uint32_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 (file->filename, O_RDONLY);
- if (fd < 0)
+ fd = open_not_cancel_2 (file->filename, O_RDONLY | O_CLOEXEC);
+ if (__builtin_expect (fd, 0) < 0)
/* Cannot open the file. */
return;
- if (__fstat (fd, &st) < 0)
- goto puntfd;
- if (S_ISDIR (st.st_mode))
+ if (__builtin_expect (__fxstat64 (_STAT_VER, fd, &st), 0) < 0)
+ {
+ puntfd:
+ close_not_cancel_no_status (fd);
+ return;
+ }
+ if (__glibc_unlikely (S_ISDIR (st.st_mode)))
{
/* LOCALE/LC_foo is a directory; open LOCALE/LC_foo/SYS_LC_foo
- instead. */
+ instead. */
char *newp;
+ size_t filenamelen;
- __close (fd);
+ close_not_cancel_no_status (fd);
- newp = (char *) alloca (strlen (file->filename)
+ filenamelen = strlen (file->filename);
+ newp = (char *) alloca (filenamelen
+ 5 + _nl_category_name_sizes[category] + 1);
- __stpcpy (__stpcpy (__stpcpy (newp, file->filename), "/SYS_"),
- _nl_category_names[category]);
+ __mempcpy (__mempcpy (__mempcpy (newp, file->filename, filenamelen),
+ "/SYS_", 5),
+ _nl_category_names.str + _nl_category_name_idxs[category],
+ _nl_category_name_sizes[category] + 1);
- fd = __open (newp, O_RDONLY);
- if (fd < 0)
+ fd = open_not_cancel_2 (newp, O_RDONLY | O_CLOEXEC);
+ if (__builtin_expect (fd, 0) < 0)
return;
- if (__fstat (fd, &st) < 0)
+ if (__builtin_expect (__fxstat64 (_STAT_VER, fd, &st), 0) < 0)
goto puntfd;
}
/* Map in the file's data. */
save_err = errno;
-#ifndef MAP_COPY
+#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
+# define MAP_COPY MAP_PRIVATE
+# endif
+# ifndef MAP_FILE
/* Some systems do not have this flag; it is superfluous. */
-#define MAP_FILE 0
-#endif
-#ifndef MAP_INHERIT
- /* Some systems might lack this; they lose. */
-#define MAP_INHERIT 0
-#endif
- filedata = (void *) __mmap ((caddr_t) 0, st.st_size, PROT_READ,
- MAP_FILE|MAP_COPY|MAP_INHERIT, fd, 0);
- if ((void *) filedata == MAP_FAILED)
+# define MAP_FILE 0
+# endif
+ filedata = __mmap ((caddr_t) 0, st.st_size,
+ PROT_READ, MAP_FILE|MAP_COPY, fd, 0);
+ if (__glibc_unlikely (filedata == MAP_FAILED))
{
- if (errno == ENOSYS)
+ filedata = NULL;
+ if (__builtin_expect (errno, ENOSYS) == ENOSYS)
{
+#endif /* _POSIX_MAPPED_FILES */
/* No mmap; allocate a buffer and read from the file. */
- mmaped = 0;
+ alloc = ld_malloced;
filedata = malloc (st.st_size);
if (filedata != NULL)
{
char *p = (char *) filedata;
while (to_read > 0)
{
- nread = __read (fd, p, to_read);
- if (nread <= 0)
+ nread = read_not_cancel (fd, p, to_read);
+ if (__builtin_expect (nread, 1) <= 0)
{
free (filedata);
if (nread == 0)
p += nread;
to_read -= nread;
}
+ __set_errno (save_err);
}
- else
- goto puntfd;
- __set_errno (save_err);
+#ifdef _POSIX_MAPPED_FILES
}
- else
- goto puntfd;
}
- else if (st.st_size < sizeof (*filedata))
- /* This cannot be a locale data file since it's too small. */
- goto puntfd;
+#endif /* _POSIX_MAPPED_FILES */
- if (filedata->magic != LIMAGIC (category))
- /* Bad data file in either byte order. */
- {
- puntmap:
- __munmap ((caddr_t) filedata, st.st_size);
- puntfd:
- __close (fd);
- return;
- }
+ /* We have mapped the data, so we no longer need the descriptor. */
+ close_not_cancel_no_status (fd);
- if (filedata->nstrings < _nl_category_num_items[category] ||
- (sizeof *filedata + filedata->nstrings * sizeof (unsigned int)
- >= (size_t) st.st_size))
+ if (__glibc_unlikely (filedata == NULL))
+ /* We failed to map or read the data. */
+ return;
+
+ newdata = _nl_intern_locale_data (category, filedata, st.st_size);
+ if (__glibc_unlikely (newdata == NULL))
+ /* Bad data. */
{
- /* Insufficient data. */
- __set_errno (EINVAL);
- goto puntmap;
+#ifdef _POSIX_MAPPED_FILES
+ if (alloc == ld_mapped)
+ __munmap ((caddr_t) filedata, st.st_size);
+#endif
+ return;
}
- newdata = malloc (sizeof *newdata
- + (_nl_category_num_items[category]
- * sizeof (union locale_data_value)));
- if (! newdata)
- goto puntmap;
-
+ /* _nl_intern_locale_data leaves us these fields to initialize. */
newdata->name = NULL; /* This will be filled if necessary in findlocale.c. */
- newdata->filedata = (void *) filedata;
- newdata->filesize = st.st_size;
- newdata->mmaped = mmaped;
- newdata->usage_count = 0;
- newdata->nstrings = _nl_category_num_items[category];
- for (cnt = 0; cnt < newdata->nstrings; ++cnt)
- {
- off_t idx = filedata->strindex[cnt];
- if (idx >= newdata->filesize)
- {
- free (newdata);
- __set_errno (EINVAL);
- goto puntmap;
- }
- if (_nl_value_types[category][cnt] == word)
- newdata->values[cnt].word = *((u_int32_t *) (newdata->filedata + idx));
- else
- newdata->values[cnt].string = newdata->filedata + idx;
- }
+ newdata->alloc = alloc;
- __close (fd);
file->data = newdata;
}
void
-_nl_unload_locale (struct locale_data *locale)
+internal_function
+_nl_unload_locale (struct __locale_data *locale)
{
- if (locale->mmaped)
- __munmap ((caddr_t) locale->filedata, locale->filesize);
- else
- free ((void *) locale->filedata);
+ 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);
}
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