1  /* Initialization of libc after dlmopen/dlclose/dlmopen (bug 29528).  Module 2.
       2     Copyright (C) 2022-2023 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 <ctype.h>
      20  #include <stdio.h>
      21  
      22  static void __attribute__ ((constructor))
      23  init (void)
      24  {
      25    puts ("info: tst-dlmopen-twice-mod2.so loaded");
      26    fflush (stdout);
      27  }
      28  
      29  static void __attribute__ ((destructor))
      30  fini (void)
      31  {
      32    puts ("info: tst-dlmopen-twice-mod2.so about to be unloaded");
      33    fflush (stdout);
      34  }
      35  
      36  int
      37  run_check (void)
      38  {
      39    puts ("info: about to call isalpha");
      40    fflush (stdout);
      41  
      42    volatile char ch = 'a';
      43    if (!isalpha (ch))
      44      {
      45        puts ("error: isalpha ('a') is not true");
      46        fflush (stdout);
      47        return 1;
      48      }
      49    return 0;
      50  }