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b6ab06ce | 1 | /* Find path of executable. |
581c785b | 2 | Copyright (C) 1998-2022 Free Software Foundation, Inc. |
ebbad4cc | 3 | This file is part of the GNU C Library. |
28f540f4 | 4 | |
ebbad4cc | 5 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
28f540f4 | 9 | |
ebbad4cc UD |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
28f540f4 | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
28f540f4 | 18 | |
28f540f4 | 19 | #include <stdlib.h> |
b6ab06ce UD |
20 | #include <string.h> |
21 | #include <sys/param.h> | |
22 | #include <ldsodefs.h> | |
28f540f4 | 23 | |
b6ab06ce UD |
24 | #include <dl-dst.h> |
25 | ||
26 | ||
27 | const char * | |
28 | _dl_get_origin (void) | |
28f540f4 | 29 | { |
b6ab06ce UD |
30 | char *result = (char *) -1; |
31 | /* We use the environment variable LD_ORIGIN_PATH. If it is set make | |
32 | a copy and strip out trailing slashes. */ | |
33 | if (GLRO(dl_origin_path) != NULL) | |
34 | { | |
35 | size_t len = strlen (GLRO(dl_origin_path)); | |
36 | result = (char *) malloc (len + 1); | |
37 | if (result == NULL) | |
38 | result = (char *) -1; | |
39 | else | |
40 | { | |
41 | char *cp = __mempcpy (result, GLRO(dl_origin_path), len); | |
42 | while (cp > result + 1 && cp[-1] == '/') | |
43 | --cp; | |
44 | *cp = '\0'; | |
45 | } | |
46 | } | |
28f540f4 | 47 | |
b6ab06ce UD |
48 | return result; |
49 | } |