OpenE2K
/
glibc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
glibc/locale/loadlocale.c

309 lines
8.1 KiB
C
Raw Blame History

/* Functions to read locale data files.
Copyright (C) 1996-2004, 2005, 2006, 2010, 2011 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, 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>
#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 *const _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 | O_CLOEXEC);
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.str + _nl_category_name_idxs[category],
_nl_category_name_sizes[category] + 1);
fd = open_not_cancel_2 (newp, O_RDONLY | O_CLOEXEC);
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))
{
filedata = NULL;
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);
}
Reference in New Issue View Git Blame Copy Permalink