support/xdlfcn.c

   1 /* Support functionality for using dlopen/dlclose/dlsym.
   2    Copyright (C) 2017 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 <support/check.h>
  20 #include <support/xdlfcn.h>
  21
  22 void *
  23 xdlopen (const char *filename, int flags)
  24 {
  25   void *dso = dlopen (filename, flags);
  26
  27   if (dso == NULL)
  28     FAIL_EXIT1 ("error: dlopen: %s\n", dlerror ());
  29
  30   /* Clear any errors.  */
  31   dlerror ();
  32
  33   return dso;
  34 }
  35
  36 void *
  37 xdlsym (void *handle, const char *symbol)
  38 {
  39   void *sym = dlsym (handle, symbol);
  40
  41   if (sym == NULL)
  42     FAIL_EXIT1 ("error: dlsym: %s\n", dlerror ());
  43
  44   /* Clear any errors.  */
  45   dlerror ();
  46
  47   return sym;
  48 }
  49
  50 void
  51 xdlclose (void *handle)
  52 {
  53   if (dlclose (handle) != 0)
  54     FAIL_EXIT1 ("error: dlclose: %s\n", dlerror ());
  55
  56   /* Clear any errors.  */
  57   dlerror ();
  58 }