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
23int
24main (void)
25{
26 void *h;
27 const char *s;
28
29 /* Test that dlerror works initially. */
30 s = dlerror ();
31 printf (format: "dlerror() without prior dl*() call returned: %s\n", s);
32 if (s != NULL)
33 return 1;
34
35 h = dlopen (file: "errmsg1mod.so", RTLD_NOW);
36 if (h != NULL)
37 {
38 dlclose (handle: h);
39 puts (s: "errmsg1mod.so could be loaded !?");
40 exit (1);
41 }
42
43 s = dlerror ();
44 puts (s: s);
45
46 return strstr (s, "errmsg1mod.so") == NULL;
47}
48

source code of glibc/dlfcn/errmsg1.c