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1998-08-27 19:42 Ulrich Drepper <drepper@cygnus.com> * elf/Makefile (distribute): Add dl-origin.h. * sysdeps/generic/dl-origin.h: New file. * sysdeps/unix/sysv/linux/dl-origin.h: New file. * elf/link.h (struct link_map): Add l_origin field. * elf/dl-load.c (expand_dynamic_string_token): New function. (decompose_path): Remove WHERE argument, take link map pointer instead. Call expand_dynamic_string_token instead of local_strdup to make copy of rpath. (_dl_init_paths): Call decompose_path with correct argument. (_dl_map_object_from_fd): Define static is EXTERNAL_MAP_FROM_FD is not defined. Check EI_OSABI and EI_ABIVERSION fields in header. (_dl_map_object): Call decompose_path with correct argument. Call expand_dynamic_string_token instead of local_strdup to also expand DST. * elf/dl-object.c (_dl_new_object): Determine l_origin for all maps but the main one. * elf/dl-support.c: Define _dl_origin_path. * elf/rtld.c: Likewise. Set _dl_origin_path based on LD_ORIGIN_PATH. * elf/dl-close (_dl_close): Free l_name and l_origin. * sysdeps/i386/useldt.h (THREAD_GETMEM, THREAD_SETMEM): Use P modifier in asm, not c. * sysdeps/mach/hurd/Makefile [subdirs==elf]: Define CFLAGS-dl-load.c to -DEXTERNAL_MAP_FROM_FD to make _dl_map_object_from_fd extern.
48 lines
1.6 KiB
C
48 lines
1.6 KiB
C
/* Find path of executable.
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Copyright (C) 1998 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
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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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/* Generally it is not possible to implement this. We have to fall
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back on a solution where the user provides the information. */
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extern const char *_dl_origin_path;
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static inline const char *
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get_origin (void)
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{
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char *result = (char *) -1;
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/* We use te environment variable LD_ORIGIN_PATH. If it is set make
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a copy and strip out trailing slashes. */
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if (_dl_origin_path != NULL)
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{
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size_t len = strlen (_dl_origin_path);
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result = malloc (len + 1);
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if (result == NULL)
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result = (char *) -1;
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else
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{
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char *cp = __mempcpy (result, _dl_origin_path, len);
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while (cp > result && cp[-1] == '/')
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--cp;
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*cp = '\0';
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}
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}
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return result;
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}
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