143e2b96c9
1998-09-02 Ulrich Drepper <drepper@cygnus.com> * elf/dl-load.c (fillin_rpath): Handle "/" as RPATH correctly. (_dl_map_object_from_fd): Make NAME argument const. Remove last parameter in _dl_new_object call. (print_search_path): Correct construction of composed path name. (_dl_map_object): Prevent looking at RPATH of the main map twice. Remove last parameter in _dl_new_object call. * elf/dl-object.c: Remove last parameter. Determine whether create origin entry based on empty realname. Handle file in root directory correctly. * elf/ldsodefs.h: Adjust prototype for _dl_new_object. * elf/rtld.c (dl_main): Add comment describing reason for memory leak. Remove last parameter in _dl_new_object call. * sysdeps/generic/dl-origin.h: Handle file in root directory correctly. * sysdeps/unix/sysv/linux/dl-origin.h: Likewise.
68 lines
2.2 KiB
C
68 lines
2.2 KiB
C
/* Find path of executable.
|
|
Copyright (C) 1998 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. */
|
|
|
|
/* 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;
|
|
|
|
static inline const char *
|
|
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;
|
|
}
|