mirror of https://github.com/openssl/openssl.git
54 lines
1.3 KiB
C
54 lines
1.3 KiB
C
/*
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* Copyright 2020-2021 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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/*
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* Extremely simple dynamic loader, must never be linked with anything other
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* than the standard C library. Its purpose is to try to load a dynamic module
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* and verify the presence of one symbol, if that's given.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <openssl/core.h>
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#include "simpledynamic.h"
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static int test_load(const char *path, const char *symbol)
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{
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#ifdef SD_INIT
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SD sd = SD_INIT;
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SD_SYM sym;
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int ret;
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if (!sd_load(path, &sd, SD_MODULE))
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return 0;
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ret = symbol == NULL || sd_sym(sd, symbol, &sym);
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if (!sd_close(sd))
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ret = 0;
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return ret;
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#else
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fprintf(stderr, "No dynamic loader\n");
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return 0;
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#endif
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}
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int main(int argc, char *argv[])
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{
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const char *m, *s;
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if (argc != 2 && argc != 3) {
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fprintf(stderr, "Usage: %s sharedobject [ entrypoint ]\n", argv[0]);
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return 1;
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}
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m = argv[1];
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s = argc == 3 ? argv[2] : NULL;
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return test_load(m, s) ? 0 : 1;
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}
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