1 /* Find path of executable.
2 Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
23 #include <sys/param.h>
28 /* Generally it is not possible to implement this. We have to fall
29 back on a solution where the user provides the information. */
30 extern const char *_dl_origin_path
;
35 char *result
= (char *) -1;
36 /* We use the environment variable LD_ORIGIN_PATH. If it is set make
37 a copy and strip out trailing slashes. */
38 if (_dl_origin_path
!= NULL
)
40 size_t len
= strlen (_dl_origin_path
);
41 result
= malloc (len
+ 1);
46 char *cp
= __mempcpy (result
, _dl_origin_path
, len
);
47 while (cp
> result
+ 1 && cp
[-1] == '/')