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1cc9e59a | 1 | /* Support functionality for using dlopen/dlclose/dlsym. |
04277e02 | 2 | Copyright (C) 2017-2019 Free Software Foundation, Inc. |
1cc9e59a PP |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
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. | |
9 | ||
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 | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
17 | <http://www.gnu.org/licenses/>. */ | |
18 | ||
f58bd7f0 | 19 | #include <stddef.h> |
1cc9e59a PP |
20 | #include <support/check.h> |
21 | #include <support/xdlfcn.h> | |
22 | ||
23 | void * | |
24 | xdlopen (const char *filename, int flags) | |
25 | { | |
26 | void *dso = dlopen (filename, flags); | |
27 | ||
28 | if (dso == NULL) | |
29 | FAIL_EXIT1 ("error: dlopen: %s\n", dlerror ()); | |
30 | ||
1cc9e59a PP |
31 | return dso; |
32 | } | |
33 | ||
34 | void * | |
35 | xdlsym (void *handle, const char *symbol) | |
36 | { | |
3b935595 FW |
37 | /* Clear any pending errors. */ |
38 | dlerror (); | |
39 | ||
1cc9e59a PP |
40 | void *sym = dlsym (handle, symbol); |
41 | ||
42 | if (sym == NULL) | |
3b935595 FW |
43 | { |
44 | const char *error = dlerror (); | |
45 | if (error != NULL) | |
46 | FAIL_EXIT1 ("error: dlsym: %s\n", error); | |
47 | /* If there was no error, we found a NULL symbol. Return the | |
48 | NULL value in this case. */ | |
49 | } | |
1cc9e59a PP |
50 | |
51 | return sym; | |
52 | } | |
53 | ||
54 | void | |
55 | xdlclose (void *handle) | |
56 | { | |
57 | if (dlclose (handle) != 0) | |
58 | FAIL_EXIT1 ("error: dlclose: %s\n", dlerror ()); | |
1cc9e59a | 59 | } |