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/* This testcase is part of GDB, the GNU debugger.
Copyright 2017-2021 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <dlfcn.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int
main ()
{
void *handle;
int (*foo) (int);
char *error;
char *dest = VANISH_LIB ".renamed";
/* Open library. */
handle = dlopen (VANISH_LIB, RTLD_NOW);
if (!handle)
{
fprintf (stderr, "%s\n", dlerror ());
exit (EXIT_FAILURE);
}
/* Clear any existing error */
dlerror ();
/* Simulate deleting file by renaming it. */
if (rename (VANISH_LIB, dest) == -1)
{
error = strerror (errno);
fprintf (stderr, "rename %s -> %s: %s\n", VANISH_LIB, dest, error);
exit (EXIT_FAILURE);
}
/* Get function pointer. */
foo = dlsym (handle, "foo");
error = dlerror ();
if (error != NULL)
{
fprintf (stderr, "%s\n", error);
exit (EXIT_FAILURE);
}
/* Call function. */
(*foo) (1);
/* Close and exit. */
dlclose (handle);
/* Put VANISH_LIB back where we found it. */
if (rename (dest, VANISH_LIB) == -1)
{
error = strerror (errno);
fprintf (stderr, "rename %s -> %s: %s\n", dest, VANISH_LIB, error);
exit (EXIT_FAILURE);
}
exit (EXIT_SUCCESS);
}
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