1 /* Copyright (C) 2000-2022 Free Software Foundation, Inc.
2    This file is part of the GNU C Library.
3 
4    The GNU C Library is free software; you can redistribute it and/or
5    modify it under the terms of the GNU Lesser General Public
6    License as published by the Free Software Foundation; either
7    version 2.1 of the License, or (at your option) any later version.
8 
9    The GNU C Library is distributed in the hope that it will be useful,
10    but WITHOUT ANY WARRANTY; without even the implied warranty of
11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12    Lesser General Public License for more details.
13 
14    You should have received a copy of the GNU Lesser General Public
15    License along with the GNU C Library; if not, see
16    <https://www.gnu.org/licenses/>.  */
17 
18 #include <dlfcn.h>
19 #include <stdio.h>
20 #include <stdlib.h>
21 #include <string.h>
22 
23 int
main(void)24 main (void)
25 {
26   void *h;
27   const char *s;
28 
29   /* Test that dlerror works initially.  */
30   s = dlerror ();
31   printf ("dlerror() without prior dl*() call returned: %s\n", s);
32   if (s != NULL)
33     return 1;
34 
35   h = dlopen ("errmsg1mod.so", RTLD_NOW);
36   if (h != NULL)
37     {
38       dlclose (h);
39       puts ("errmsg1mod.so could be loaded !?");
40       exit (1);
41     }
42 
43   s = dlerror ();
44   puts (s);
45 
46   return strstr (s, "errmsg1mod.so") == NULL;
47 }
48