1  /* Check dlopen failure on audit modules.
       2     Copyright (C) 2021-2023 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     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <dlfcn.h>
      20  #include <link.h>
      21  #include <stdlib.h>
      22  
      23  unsigned int
      24  la_version (unsigned int v)
      25  {
      26    return LAV_CURRENT;
      27  }
      28  
      29  static void
      30  check (void)
      31  {
      32    {
      33      void *mod = dlopen ("nonexistent.so", RTLD_NOW);
      34      if (mod != NULL)
      35        abort ();
      36    }
      37  
      38    {
      39      void *mod = dlmopen (LM_ID_BASE, "nonexistent.so", RTLD_NOW);
      40      if (mod != NULL)
      41        abort ();
      42    }
      43  }
      44  
      45  void
      46  la_activity (uintptr_t *cookie, unsigned int flag)
      47  {
      48    if (flag != LA_ACT_CONSISTENT)
      49      return;
      50    check ();
      51  }
      52  
      53  void
      54  la_preinit (uintptr_t *cookie)
      55  {
      56    check ();
      57  }