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80 lines
2.0 KiB
C
80 lines
2.0 KiB
C
/* Support functionality for using dlopen/dlclose/dlsym.
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Copyright (C) 2017-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <stddef.h>
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#include <support/check.h>
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#include <support/xdlfcn.h>
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void *
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xdlopen (const char *filename, int flags)
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{
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void *dso = dlopen (filename, flags);
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if (dso == NULL)
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FAIL_EXIT1 ("error: dlopen: %s\n", dlerror ());
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return dso;
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}
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void *
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xdlsym (void *handle, const char *symbol)
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{
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/* Clear any pending errors. */
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dlerror ();
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void *sym = dlsym (handle, symbol);
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if (sym == NULL)
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{
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const char *error = dlerror ();
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if (error != NULL)
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FAIL_EXIT1 ("error: dlsym: %s\n", error);
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/* If there was no error, we found a NULL symbol. Return the
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NULL value in this case. */
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}
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return sym;
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}
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void *
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xdlvsym (void *handle, const char *symbol, const char *version)
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{
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/* Clear any pending errors. */
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dlerror ();
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void *sym = dlvsym (handle, symbol, version);
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if (sym == NULL)
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{
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const char *error = dlerror ();
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if (error != NULL)
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FAIL_EXIT1 ("error: dlvsym: %s\n", error);
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/* If there was no error, we found a NULL symbol. Return the
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NULL value in this case. */
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}
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return sym;
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}
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void
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xdlclose (void *handle)
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{
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if (dlclose (handle) != 0)
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FAIL_EXIT1 ("error: dlclose: %s\n", dlerror ());
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}
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