libstdc++-v3/testsuite/27_io/objects/wchar_t/7.cc

   1 // { dg-require-fork "" }
   2 // { dg-require-mkfifo "" }
   3
   4 // 2003-05-01 Petur Runolfsson  <peturr02@ru.is>
   5
   6 // Copyright (C) 2003-2020 Free Software Foundation, Inc.
   7 //
   8 // This file is part of the GNU ISO C++ Library.  This library is free
   9 // software; you can redistribute it and/or modify it under the
  10 // terms of the GNU General Public License as published by the
  11 // Free Software Foundation; either version 3, or (at your option)
  12 // any later version.
  13
  14 // This library is distributed in the hope that it will be useful,
  15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 // GNU General Public License for more details.
  18
  19 // You should have received a copy of the GNU General Public License along
  20 // with this library; see the file COPYING3.  If not see
  21 // <http://www.gnu.org/licenses/>.
  22
  23 // 27.3 Standard iostream objects
  24
  25 #include <fstream>
  26 #include <iostream>
  27 #include <cstdlib>
  28 #include <unistd.h>
  29 #include <signal.h>
  30 #include <fcntl.h>
  31 #include <sys/types.h>
  32 #include <sys/stat.h>
  33
  34 #include <testsuite_hooks.h>
  35
  36 // Check that wcout.flush() is called when last ios_base::Init is destroyed.
  37 bool test07()
  38 {
  39   using namespace std;
  40   using namespace __gnu_test;
  41   bool test = true;
  42
  43   const char* name = "tmp_fifo4";
  44
  45   signal(SIGPIPE, SIG_IGN);
  46
  47   unlink(name);
  48   mkfifo(name, S_IRWXU);
  49   semaphore s1;
  50
  51   int child = fork();
  52   test &= bool( child != -1 );
  53
  54   if (child == 0)
  55     {
  56       wfilebuf fbout;
  57       fbout.open(name, ios_base::out);
  58       s1.wait();
  59       wcout.rdbuf(&fbout);
  60       fbout.sputc(L'a');
  61       // NB: fbout is *not* destroyed here!
  62       exit(0);
  63     }
  64
  65   wfilebuf fbin;
  66   fbin.open(name, ios_base::in);
  67   s1.signal();
  68   wfilebuf::int_type c = fbin.sbumpc();
  69   test &= bool( c != wfilebuf::traits_type::eof() );
  70   test &= bool( c == wfilebuf::traits_type::to_int_type(L'a') );
  71
  72   fbin.close();
  73
  74   return test;
  75 }
  76
  77 int
  78 main()
  79 {
  80   return !test07();
  81 }