/* Copyright (C) 2001-2013 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 <stdio.h> #include <stdlib.h> extern void *__dso_handle __attribute__ ((__weak__)); int main (void) { const char fname[] = "modatexit.so"; void *h; void (*fp) (void *); int v = 0; if (&__dso_handle == NULL) { puts ("__dso_handle not available, cannot perform the test"); exit (0); } h = dlopen (fname, RTLD_NOW); if (h == NULL) { printf ("cannot open \"%s\": %s\n", fname, dlerror ()); exit (1); } fp = dlsym (h, "foo"); if (fp == NULL) { printf ("cannot find \"foo\": %s\n", dlerror ()); exit (1); } fp (&v); if (dlclose (h) != 0) { printf ("cannot close \"%s\": %s\n", fname, dlerror ()); exit (1); } if (v != 1) { puts ("module unload didn't change `v'"); exit (1); } puts ("finishing now"); return 0; }