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* Versions.def (ld.so): Add GLIBC_2.1.1. * elf/Makefile (routines): Add dl-origin. (tests): Add origtest. Add dependencies for the program. * elf/Versions (ld.so) [GLIBC_2.1.1]: Add _dl_origin_path, _dl_platformlen, _dl_dst_count and _dl_dst_substitute. * elf/dl-deps.c (expand_dst): New macro. Expand DSTs in filename. (_dl_map_object_deps): Use expand_dst to expand DSTs in DT_NEEDED, DT_AUXILIARY, and DT_FILTER filenames. * elf/dl-load.c (expand_dynamic_string_token): Explode into two functions and three macros. (_dl_dst_count, _dl_dst_substitute): New functions. * elf/dl-dst.h: New file. * elf/dl-open.c (_dl_open): Take extra parameter with address of caller. Pass address in args structure. (dl_open_worker): Recognize and expand DSTs in filename. * elf/ldsodefs.h (_dl_open): Adapt prototype. * elf/dlopen.c (dlopen_doit): Pass caller address to _dl_open. (__dlopen_check): Pass caller address to dlopen_doit in args. * elf/dlopendoit.c: Likewise. * iconv/gconv_dl.c: Adapt call of _dl_open. * nss/nsswitch.c: Likewise. * elf/origtest.c: New file. * sysdeps/generic/dl-origin.h: Moved to... * sysdeps/generic/dl-origin.c: ...here. * sysdeps/unix/sysv/linux/dl-origin.h: Moved to... * sysdeps/unix/sysv/linux/dl-origin.c: ...here.
73 lines
3.0 KiB
C
73 lines
3.0 KiB
C
/* Handling of dynamic sring tokens.
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Copyright (C) 1999 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* Determine the number of DST elements in the name. Only if IS_PATH is
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nonzero paths are recognized (i.e., multiple, ':' separated filenames). */
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#define DL_DST_COUNT(name, is_path) \
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({ \
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size_t __cnt = 0; \
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const char *__sf = strchr (name, '$'); \
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\
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if (__sf != NULL) \
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__cnt = _dl_dst_count (__sf, is_path); \
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\
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__cnt; })
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/* Prototype for used function. */
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extern size_t _dl_dst_count (const char *name, int is_path);
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/* Guess from the number of DSTs the length of the restul string. */
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#define DL_DST_REQUIRED(l, name, len, cnt) \
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({ \
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size_t origin_len; \
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size_t __len = (len); \
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\
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/* Now we make a guess how many extra characters on top of the length \
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of S we need to represent the result. We know that we have CNT \
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replacements. Each at most can use \
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MAX (strlen (ORIGIN), strlen (_dl_platform)) \
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minus 7 (which is the length of "$ORIGIN"). \
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\
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First get the origin string if it is not available yet. This can \
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only happen for the map of the executable. */ \
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if ((l)->l_origin == NULL) \
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{ \
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assert ((l)->l_name[0] == '\0'); \
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(l)->l_origin = _dl_get_origin (); \
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origin_len = ((l)->l_origin && (l)->l_origin != (char *) -1 \
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? strlen ((l)->l_origin) : 0); \
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} \
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else \
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origin_len = (l)->l_origin == (char *) -1 ? 0 : strlen ((l)->l_origin); \
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\
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__len + cnt * (MAX (origin_len, _dl_platformlen) - 7); })
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/* Find origin of the executable. */
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extern const char *_dl_get_origin (void);
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/* Perform the DST substitution. */
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#define DL_DST_SUBSTITUTE(l, name, res, is_path) \
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_dl_dst_substitute (l, name, res, is_path)
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/* Prototype for used function. */
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extern char *_dl_dst_substitute (struct link_map *l, const char *name,
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char *result, int is_path);
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