-/* Copyright (C) 1996 Free Software Foundation, Inc.
+/* Copyright (C) 1996-2014 Free Software Foundation, Inc.
This file is part of the GNU C Library.
- Contributed by Ulrich Drepper, <drepper@gnu.ai.mit.edu>.
+ Contributed by Ulrich Drepper, <drepper@gnu.org>.
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 <byteswap.h>
#include <endian.h>
+#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
-#include <sys/mman.h>
+#ifdef _POSIX_MAPPED_FILES
+# include <sys/mman.h>
+#endif
#include <sys/stat.h>
#include "catgetsinfo.h"
+#include <not-cancel.h>
-#define SWAPU32(w) \
- (((w) << 24) | (((w) & 0xff00) << 8) | (((w) >> 8) & 0xff00) | ((w) >> 24))
+#define SWAPU32(w) bswap_32 (w)
-void
-__open_catalog (__nl_catd catalog, int with_path)
+int
+__open_catalog (const char *cat_name, const char *nlspath, const char *env_var,
+ __nl_catd catalog)
{
- int fd;
- struct stat st;
+ int fd = -1;
+ struct stat64 st;
int swapping;
+ size_t cnt;
+ size_t max_offset;
+ size_t tab_size;
+ const char *lastp;
+ int result = -1;
- if (strchr (catalog->cat_name, '/') != NULL || !with_path)
- fd = open (catalog->cat_name, O_RDONLY);
+ if (strchr (cat_name, '/') != NULL || nlspath == NULL)
+ fd = open_not_cancel_2 (cat_name, O_RDONLY);
else
{
- const char *run_nlspath = catalog->nlspath;
+ const char *run_nlspath = nlspath;
#define ENOUGH(n) \
- if (bufact + (n) >=bufmax) \
+ if (__glibc_unlikely (bufact + (n) >= bufmax)) \
{ \
char *old_buf = buf; \
bufmax += 256 + (n); \
char *buf;
size_t bufact;
size_t bufmax;
+ size_t len;
buf = NULL;
bufmax = 0;
while (*run_nlspath != '\0')
{
bufact = 0;
- while (*run_nlspath != ':' && *run_nlspath != '\0')
- if (*run_nlspath == '%')
- {
- const char *tmp;
-
- ++run_nlspath; /* We have seen the `%'. */
- switch (*run_nlspath++)
- {
- case 'N':
- /* Use the catalog name. */
- ENOUGH (strlen (catalog->cat_name));
- bufact = __stpcpy (&buf[bufact], catalog->cat_name) - buf;
- break;
- case 'L':
- /* Use the current locale category value. */
- ENOUGH (strlen (catalog->env_var));
- bufact = __stpcpy (&buf[bufact], catalog->env_var) - buf;
- break;
- case 'l':
- /* Use language element of locale category value. */
- tmp = catalog->env_var;
- do
- {
- ENOUGH (1);
- buf[bufact++] = *tmp++;
- }
- while (*tmp != '\0' && *tmp != '_' && *tmp != '.');
- break;
- case 't':
- /* Use territory element of locale category value. */
- tmp = catalog->env_var;
- do
- ++tmp;
- while (*tmp != '\0' && *tmp != '_' && *tmp != '.');
- if (*tmp == '_')
- {
+
+ if (*run_nlspath == ':')
+ {
+ /* Leading colon or adjacent colons - treat same as %N. */
+ len = strlen (cat_name);
+ ENOUGH (len);
+ memcpy (&buf[bufact], cat_name, len);
+ bufact += len;
+ }
+ else
+ while (*run_nlspath != ':' && *run_nlspath != '\0')
+ if (*run_nlspath == '%')
+ {
+ const char *tmp;
+
+ ++run_nlspath; /* We have seen the `%'. */
+ switch (*run_nlspath++)
+ {
+ case 'N':
+ /* Use the catalog name. */
+ len = strlen (cat_name);
+ ENOUGH (len);
+ memcpy (&buf[bufact], cat_name, len);
+ bufact += len;
+ break;
+ case 'L':
+ /* Use the current locale category value. */
+ len = strlen (env_var);
+ ENOUGH (len);
+ memcpy (&buf[bufact], env_var, len);
+ bufact += len;
+ break;
+ case 'l':
+ /* Use language element of locale category value. */
+ tmp = env_var;
+ do
+ {
+ ENOUGH (1);
+ buf[bufact++] = *tmp++;
+ }
+ while (*tmp != '\0' && *tmp != '_' && *tmp != '.');
+ break;
+ case 't':
+ /* Use territory element of locale category value. */
+ tmp = env_var;
+ do
++tmp;
- do
- {
- ENOUGH (1);
- buf[bufact++] = *tmp;
- }
- while (*tmp != '\0' && *tmp != '.');
- }
- break;
- case 'c':
- /* Use code set element of locale category value. */
- tmp = catalog->env_var;
- do
- ++tmp;
- while (*tmp != '\0' && *tmp != '.');
- if (*tmp == '.')
- {
+ while (*tmp != '\0' && *tmp != '_' && *tmp != '.');
+ if (*tmp == '_')
+ {
+ ++tmp;
+ do
+ {
+ ENOUGH (1);
+ buf[bufact++] = *tmp++;
+ }
+ while (*tmp != '\0' && *tmp != '.');
+ }
+ break;
+ case 'c':
+ /* Use code set element of locale category value. */
+ tmp = env_var;
+ do
++tmp;
- do
- {
- ENOUGH (1);
- buf[bufact++] = *tmp;
- }
- while (*tmp != '\0');
- }
- break;
- case '%':
- ENOUGH (1);
- buf[bufact++] = '%';
- break;
- default:
- /* Unknown variable: ignore this path element. */
- bufact = 0;
- while (*run_nlspath != '\0' && *run_nlspath != ':')
- ++run_nlspath;
- break;
- }
- }
- else
- {
- ENOUGH (1);
- buf[bufact++] = *run_nlspath++;
- }
+ while (*tmp != '\0' && *tmp != '.');
+ if (*tmp == '.')
+ {
+ ++tmp;
+ do
+ {
+ ENOUGH (1);
+ buf[bufact++] = *tmp++;
+ }
+ while (*tmp != '\0');
+ }
+ break;
+ case '%':
+ ENOUGH (1);
+ buf[bufact++] = '%';
+ break;
+ default:
+ /* Unknown variable: ignore this path element. */
+ bufact = 0;
+ while (*run_nlspath != '\0' && *run_nlspath != ':')
+ ++run_nlspath;
+ break;
+ }
+ }
+ else
+ {
+ ENOUGH (1);
+ buf[bufact++] = *run_nlspath++;
+ }
+
ENOUGH (1);
buf[bufact] = '\0';
if (bufact != 0)
{
- fd = __open (buf, O_RDONLY);
+ fd = open_not_cancel_2 (buf, O_RDONLY);
if (fd >= 0)
break;
}
}
}
- if (fd < 0 || __fstat (fd, &st) < 0)
+ /* Avoid dealing with directories and block devices */
+ if (__builtin_expect (fd, 0) < 0)
+ return -1;
+
+ if (__builtin_expect (__fxstat64 (_STAT_VER, fd, &st), 0) < 0)
+ goto close_unlock_return;
+
+ if (__builtin_expect (!S_ISREG (st.st_mode), 0)
+ || (size_t) st.st_size < sizeof (struct catalog_obj))
{
- catalog->status = nonexisting;
- return;
+ /* `errno' is not set correctly but the file is not usable.
+ Use an reasonable error value. */
+ __set_errno (EINVAL);
+ goto close_unlock_return;
}
-#ifndef MAP_COPY
+ catalog->file_size = st.st_size;
+#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
- catalog->file_size = st.st_size;
+# define MAP_FILE 0
+# endif
catalog->file_ptr =
(struct catalog_obj *) __mmap (NULL, st.st_size, PROT_READ,
- MAP_FILE|MAP_COPY|MAP_INHERIT, fd, 0);
- if (catalog->file_ptr != (struct catalog_obj *) -1)
+ MAP_FILE|MAP_COPY, fd, 0);
+ if (__builtin_expect (catalog->file_ptr != (struct catalog_obj *) MAP_FAILED,
+ 1))
/* Tell the world we managed to mmap the file. */
- catalog->status = mmaped;
+ catalog->status = mmapped;
else
+#endif /* _POSIX_MAPPED_FILES */
{
/* mmap failed perhaps because the system call is not
implemented. Try to load the file. */
size_t todo;
catalog->file_ptr = malloc (st.st_size);
if (catalog->file_ptr == NULL)
- {
- catalog->status = nonexisting;
- return;
- }
+ goto close_unlock_return;
+
todo = st.st_size;
/* Save read, handle partial reads. */
do
{
- size_t now = __read (fd, (((char *) &catalog->file_ptr)
- + (st.st_size - todo)), todo);
- if (now == 0)
+ size_t now = read_not_cancel (fd, (((char *) catalog->file_ptr)
+ + (st.st_size - todo)), todo);
+ if (now == 0 || now == (size_t) -1)
{
+#ifdef EINTR
+ if (now == (size_t) -1 && errno == EINTR)
+ continue;
+#endif
free ((void *) catalog->file_ptr);
- catalog->status = nonexisting;
- return;
+ goto close_unlock_return;
}
todo -= now;
}
catalog->status = malloced;
}
- /* We don't need the file anymore. */
- __close (fd);
-
/* Determine whether the file is a catalog file and if yes whether
it is written using the correct byte order. Else we have to swap
the values. */
- if (catalog->file_ptr->magic == CATGETS_MAGIC)
+ if (__glibc_likely (catalog->file_ptr->magic == CATGETS_MAGIC))
swapping = 0;
else if (catalog->file_ptr->magic == SWAPU32 (CATGETS_MAGIC))
swapping = 1;
else
{
- /* Illegal file. Free he resources and mark catalog as not
+ invalid_file:
+ /* Invalid file. Free the resources and mark catalog as not
usable. */
- if (catalog->status == mmaped)
+#ifdef _POSIX_MAPPED_FILES
+ if (catalog->status == mmapped)
__munmap ((void *) catalog->file_ptr, catalog->file_size);
else
+#endif /* _POSIX_MAPPED_FILES */
free (catalog->file_ptr);
- catalog->status = nonexisting;
- return;
+ goto close_unlock_return;
}
#define SWAP(x) (swapping ? SWAPU32 (x) : (x))
catalog->strings =
(const char *) &catalog->file_ptr->name_ptr[catalog->plane_size
* catalog->plane_depth * 3 * 2];
+
+ /* Determine the largest string offset mentioned in the table. */
+ max_offset = 0;
+ tab_size = 3 * catalog->plane_size * catalog->plane_depth;
+ for (cnt = 2; cnt < tab_size; cnt += 3)
+ if (catalog->name_ptr[cnt] > max_offset)
+ max_offset = catalog->name_ptr[cnt];
+
+ /* Now we can check whether the file is large enough to contain the
+ tables it says it contains. */
+ if ((size_t) st.st_size
+ <= (sizeof (struct catalog_obj) + 2 * tab_size + max_offset))
+ /* The last string is not contained in the file. */
+ goto invalid_file;
+
+ lastp = catalog->strings + max_offset;
+ max_offset = (st.st_size
+ - sizeof (struct catalog_obj) + 2 * tab_size + max_offset);
+ while (*lastp != '\0')
+ {
+ if (--max_offset == 0)
+ goto invalid_file;
+ ++lastp;
+ }
+
+ /* We succeeded. */
+ result = 0;
+
+ /* Release the lock again. */
+ close_unlock_return:
+ close_not_cancel_no_status (fd);
+
+ return result;
}
+libc_hidden_def (__open_catalog)
projects / thirdparty / glibc.git / blobdiff