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/* Check that dlfcn errors are reported properly after dlmopen. Test module.
Copyright (C) 2021-2025 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <dlfcn.h>
#include <stddef.h>
#include <stdio.h>
#include <string.h>
#include <support/check.h>
/* Note: This object is not linked into the main program, so we cannot
use delayed test failure reporting via TEST_VERIFY etc., and have
to use FAIL_EXIT1 (or something else that calls exit). */
void
call_dlsym (const char *name)
{
void *ptr = dlsym (NULL, name);
if (ptr != NULL)
FAIL_EXIT1 ("dlsym did not fail as expected for: %s", name);
const char *message = dlerror ();
if (strstr (message, ": undefined symbol: does not exist X") == NULL)
FAIL_EXIT1 ("invalid dlsym error message for [[%s]]: %s", name, message);
message = dlerror ();
if (message != NULL)
FAIL_EXIT1 ("second dlsym for [[%s]]: %s", name, message);
}
void
call_dlopen (const char *name)
{
void *handle = dlopen (name, RTLD_NOW);
if (handle != NULL)
FAIL_EXIT1 ("dlopen did not fail as expected for: %s", name);
const char *message = dlerror ();
if (strstr (message, "X: cannot open shared object file:"
" No such file or directory") == NULL
&& strstr (message, "X: cannot open shared object file:"
" File name too long") == NULL)
FAIL_EXIT1 ("invalid dlopen error message for [[%s]]: %s", name, message);
message = dlerror ();
if (message != NULL)
FAIL_EXIT1 ("second dlopen for [[%s]]: %s", name, message);
}
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