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527eb8d2 RL |
1 | /* |
2 | * Copyright 2020 The OpenSSL Project Authors. All Rights Reserved. | |
3 | * | |
4 | * Licensed under the Apache License 2.0 (the "License"). You may not use | |
5 | * this file except in compliance with the License. You can obtain a copy | |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
8 | */ | |
9 | ||
10 | /* | |
11 | * Extremely simple dynamic loader, must never be linked with anything other | |
12 | * than the standard C library. Its purpose is to try to load a dynamic module | |
13 | * and verify the presence of one symbol, if that's given. | |
14 | */ | |
15 | ||
16 | #include <stdio.h> | |
17 | #include <stdlib.h> | |
18 | #include <openssl/core.h> | |
19 | #include "simpledynamic.h" | |
20 | ||
21 | static int test_load(const char *path, const char *symbol) | |
22 | { | |
23 | #ifdef SD_INIT | |
24 | SD sd = SD_INIT; | |
25 | SD_SYM sym; | |
26 | ||
27 | return sd_load(path, &sd, SD_MODULE) | |
28 | && (symbol == NULL || sd_sym(sd, symbol, &sym)) | |
29 | && sd_close(sd); | |
30 | #else | |
31 | fprintf(stderr, "No dynamic loader\n"); | |
32 | return 0; | |
33 | #endif | |
34 | } | |
35 | ||
36 | int main(int argc, char *argv[]) | |
37 | { | |
38 | const char *m, *s; | |
39 | ||
40 | if (argc != 2 && argc != 3) { | |
41 | fprintf(stderr, "Usage: %s sharedobject [ entrypoint ]\n", argv[0]); | |
42 | return 1; | |
43 | } | |
44 | ||
45 | m = argv[1]; | |
46 | s = argc == 3 ? argv[2] : NULL; | |
47 | ||
48 | return test_load(m, s) ? 0 : 1; | |
49 | } |