glibc/sysdeps/unix/sysv/linux/dl-origin.c
Ulrich Drepper a42195dbe4 Update.
2000-03-23  Andreas Jaeger  <aj@suse.de>

	* elf/dl-addr.c: Adjust include paths for ldsodefs location
	change.
	* elf/dl-debug.c: Likewise.
	* elf/dl-deps.c: Likewise.
	* elf/dl-error.c: Likewise.
	* elf/dl-fini.c: Likewise.
	* elf/dl-init.c: Likewise.
	* elf/dl-load.c: Likewise.
	* elf/dl-lookup.c: Likewise.
	* elf/dl-minimal.c: Likewise.
	* elf/dl-object.c: Likewise.
	* elf/dl-open.c: Likewise.
	* elf/dl-preinit.c: Likewise.
	* elf/dl-profile.c: Likewise.
	* elf/dl-profstub.c: Likewise.
	* elf/dl-reloc.c: Likewise.
	* elf/dl-runtime.c: Likewise.
	* elf/dl-support.c: Likewise.
	* elf/dl-symbol.c: Likewise.
	* elf/dl-version.c: Likewise.
	* elf/rtld.c: Likewise.
	* elf/sprof.c: Likewise.
	* sysdeps/generic/dl-cache.c: Likewise.
	* sysdeps/generic/dl-origin.c: Likewise.
	* sysdeps/generic/dl-sysdep.c: Likewise.
	* sysdeps/generic/elf/backtracesyms.c: Likewise.
	* sysdeps/generic/elf/backtracesymsfd.c: Likewise.
	* sysdeps/generic/libc-start.c: Likewise.
	* sysdeps/mach/hurd/dl-sysdep.c: Likewise.
	* sysdeps/powerpc/dl-machine.c: Likewise.
	* sysdeps/powerpc/elf/libc-start.c: Likewise.
	* sysdeps/sparc/sparc32/dl-machine.h: Likewise.
	* sysdeps/sparc/sparc64/dl-machine.h: Likewise.
	* sysdeps/unix/sysv/linux/dl-origin.c: Likewise.

	* elf/ldsodefs.h: Move file to ...
	* sysdeps/generic/ldsodefs.h: ... here.

	* sysdeps/generic/ldsodefs.h: Add definition for D_PTR.
	
	* sysdeps/mips/elf/ldsodefs.h: New file.

	* elf/dl-version.c (match_symbol): Use D_PTR to access relocated
	entries in l_info.
	(_dl_check_map_versions): Likewise.
	* elf/dl-reloc.c (_dl_relocate_object): Likewise.
	* elf/dl-load.c (_dl_init_paths): Likewise.
	(_dl_map_object): Likewise.
	* elf/dynamic-link.h (_ELF_DYNAMIC_DO_RELOC): Likewise.
	(elf_get_dynamic_info): Likewise.
	* elf/do-lookup.h (FCT): Likewise.
	* elf/do-rel.h (elf_dynamic_do_rel): Likewise.
	* elf/dl-deps.c (_dl_map_object_deps): Likewise.
	* elf/dl-addr.c (_dl_addr): Likewise.
	* elf/dl-runtime.c (profile_fixup): Likewise.
	(fixup): Likewise.
	* elf/dl-init.c (_dl_init_next): Likewise.
	* sysdeps/generic/dl-machine.h (elf_machine_runtime_setup): Likewise.
	* sysdeps/unix/sysv/linux/i386/dl-librecon.h
	(DISTINGUISH_LIB_VERSIONS): Likewise.
	* sysdeps/i386/dl-machine.h (elf_machine_runtime_setup): Likewise.
	(elf_machine_rel): Likewise.

	* elf/dynamic-link.h (elf_get_dynamic_info): Only change l_info
	for writable dynamic section.
2000-03-23 20:31:46 +00:00

76 lines
2.3 KiB
C

/* Find path of executable.
Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
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.
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.
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. */
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/param.h>
#include <ldsodefs.h>
#include <dl-dst.h>
/* On Linux >= 2.1 systems which have the dcache implementation we can get
the path of the application from the /proc/self/exe symlink. Try this
first and fall back on the generic method if necessary. */
extern const char *_dl_origin_path;
const char *
_dl_get_origin (void)
{
char linkval[PATH_MAX];
char *result;
if (readlink ("/proc/self/exe", linkval, PATH_MAX) != -1
&& linkval[0] != '[')
{
/* We can use this value. */
char *last_slash = strrchr (linkval, '/');
result = (char *) malloc (last_slash - linkval + 1);
if (result == NULL)
result = (char *) -1;
else if (last_slash == linkval)
memcpy (result, "/", 2);
else
*((char *) __mempcpy (result, linkval, last_slash - linkval)) = '\0';
}
else
{
result = (char *) -1;
/* We use the environment variable LD_ORIGIN_PATH. If it is set make
a copy and strip out trailing slashes. */
if (_dl_origin_path != NULL)
{
size_t len = strlen (_dl_origin_path);
result = malloc (len + 1);
if (result == NULL)
result = (char *) -1;
else
{
char *cp = __mempcpy (result, _dl_origin_path, len);
while (cp > result + 1 && cp[-1] == '/')
--cp;
*cp = '\0';
}
}
}
return result;
}