/* Handling of dynamic sring tokens.
- Copyright (C) 1999, 2001 Free Software Foundation, Inc.
+ Copyright (C) 1999-2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
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. */
-
-/* Determine the number of DST elements in the name. Only if IS_PATH is
- nonzero paths are recognized (i.e., multiple, ':' separated filenames). */
-#define DL_DST_COUNT(name, is_path) \
- ({ \
- size_t __cnt = 0; \
- const char *__sf = strchr (name, '$'); \
- \
- if (__builtin_expect (__sf != NULL, 0)) \
- __cnt = _dl_dst_count (__sf, is_path); \
- \
- __cnt; })
-
-/* Prototype for used function. */
-extern size_t _dl_dst_count (const char *name, int is_path);
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+#include "trusted-dirs.h"
+#ifdef SHARED
+# define IS_RTLD(l) (l) == &GL(dl_rtld_map)
+#else
+# define IS_RTLD(l) 0
+#endif
/* Guess from the number of DSTs the length of the result string. */
#define DL_DST_REQUIRED(l, name, len, cnt) \
({ \
- size_t origin_len; \
size_t __len = (len); \
+ size_t __cnt = (cnt); \
\
- /* Now we make a guess how many extra characters on top of the length \
- of S we need to represent the result. We know that we have CNT \
- replacements. Each at most can use \
- MAX (strlen (ORIGIN), strlen (_dl_platform)) \
- minus 7 (which is the length of "$ORIGIN"). \
- \
- First get the origin string if it is not available yet. This can \
- only happen for the map of the executable. */ \
- if ((l)->l_origin == NULL) \
+ if (__cnt > 0) \
{ \
- assert ((l)->l_name[0] == '\0'); \
- (l)->l_origin = _dl_get_origin (); \
- origin_len = ((l)->l_origin && (l)->l_origin != (char *) -1 \
- ? strlen ((l)->l_origin) : 0); \
+ size_t dst_len; \
+ /* Now we make a guess how many extra characters on top of the \
+ length of S we need to represent the result. We know that \
+ we have CNT replacements. Each at most can use \
+ MAX (MAX (strlen (ORIGIN), strlen (_dl_platform)), \
+ strlen (DL_DST_LIB)) \
+ minus 4 (which is the length of "$LIB"). \
+ \
+ First get the origin string if it is not available yet. \
+ This can only happen for the map of the executable or, when \
+ auditing, in ld.so. */ \
+ if ((l)->l_origin == NULL) \
+ { \
+ assert ((l)->l_name[0] == '\0' || IS_RTLD (l)); \
+ (l)->l_origin = _dl_get_origin (); \
+ dst_len = ((l)->l_origin && (l)->l_origin != (char *) -1 \
+ ? strlen ((l)->l_origin) : 0); \
+ } \
+ else \
+ dst_len = (l)->l_origin == (char *) -1 \
+ ? 0 : strlen ((l)->l_origin); \
+ dst_len = MAX (MAX (dst_len, GLRO(dl_platformlen)), \
+ strlen (DL_DST_LIB)); \
+ if (dst_len > 4) \
+ __len += __cnt * (dst_len - 4); \
} \
- else \
- origin_len = (l)->l_origin == (char *) -1 ? 0 : strlen ((l)->l_origin); \
\
- __len + cnt * (MAX (origin_len, _dl_platformlen) - 7); })
-
-/* Find origin of the executable. */
-extern const char *_dl_get_origin (void);
-
-
-/* Perform the DST substitution. */
-#define DL_DST_SUBSTITUTE(l, name, res, is_path) \
- _dl_dst_substitute (l, name, res, is_path)
-
-/* Prototype for used function. */
-extern char *_dl_dst_substitute (struct link_map *l, const char *name,
- char *result, int is_path);
+ __len; })
projects / thirdparty / glibc.git / blobdiff