support/xdlfcn.c

   1 /* Support functionality for using dlopen/dlclose/dlsym.
   2    Copyright (C) 2017-2018 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <stddef.h>
  20 #include <support/check.h>
  21 #include <support/xdlfcn.h>
  22
  23 void *
  24 xdlopen (const char *filename, int flags)
  25 {
  26   void *dso = dlopen (filename, flags);
  27
  28   if (dso == NULL)
  29     FAIL_EXIT1 ("error: dlopen: %s\n", dlerror ());
  30
  31   /* Clear any errors.  */
  32   dlerror ();
  33
  34   return dso;
  35 }
  36
  37 void *
  38 xdlsym (void *handle, const char *symbol)
  39 {
  40   void *sym = dlsym (handle, symbol);
  41
  42   if (sym == NULL)
  43     FAIL_EXIT1 ("error: dlsym: %s\n", dlerror ());
  44
  45   /* Clear any errors.  */
  46   dlerror ();
  47
  48   return sym;
  49 }
  50
  51 void
  52 xdlclose (void *handle)
  53 {
  54   if (dlclose (handle) != 0)
  55     FAIL_EXIT1 ("error: dlclose: %s\n", dlerror ());
  56
  57   /* Clear any errors.  */
  58   dlerror ();
  59 }