libstdc++-v3/testsuite/ext/stdio_filebuf/char/79820.cc

   1 // Copyright (C) 2017-2020 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This 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
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // { dg-require-fileio "" }
  19
  20 #include <ext/stdio_filebuf.h>
  21 #include <cstdio>
  22 #include <cerrno>
  23 #include <testsuite_hooks.h>
  24
  25 void
  26 test01()
  27 {
  28   FILE* f = std::fopen("79820.txt", "w");
  29   std::fclose(f);
  30   errno = 127;
  31   __gnu_cxx::stdio_filebuf<char> b(f, std::ios::out, BUFSIZ);
  32   VERIFY(errno == 127); // PR libstdc++/79820
  33 }
  34
  35 int
  36 main()
  37 {
  38   test01();
  39 }