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

   1 // { dg-require-fork "" }
   2 // { dg-require-mkfifo "" }
   3
   4 // 2003-04-26 Petur Runolfsson  <peturr02@ru.is>
   5
   6 // Copyright (C) 2003-2016 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 // No asserts, avoid leaking the semaphore if a VERIFY fails.
  35 #undef _GLIBCXX_ASSERT
  36
  37 #include <testsuite_hooks.h>
  38
  39 // Check that cout.flush() is called when last ios_base::Init is destroyed.
  40 bool test07()
  41 {
  42   using namespace std;
  43   using namespace __gnu_test;
  44   bool test __attribute__((unused)) = true;
  45
  46   const char* name = "tmp_fifo4";
  47
  48   signal(SIGPIPE, SIG_IGN);
  49
  50   unlink(name);
  51   mkfifo(name, S_IRWXU);
  52   semaphore s1;
  53
  54   int child = fork();
  55   VERIFY( child != -1 );
  56
  57   if (child == 0)
  58     {
  59       filebuf fbout;
  60       fbout.open(name, ios_base::in|ios_base::out);
  61       VERIFY( fbout.is_open() );
  62       s1.wait();
  63       cout.rdbuf(&fbout);
  64       fbout.sputc('a');
  65       // NB: fbout is *not* destroyed here!
  66       exit(0);
  67     }
  68
  69   filebuf fbin;
  70   fbin.open(name, ios_base::in);
  71   s1.signal();
  72   filebuf::int_type c = fbin.sbumpc();
  73   VERIFY( c != filebuf::traits_type::eof() );
  74   VERIFY( c == filebuf::traits_type::to_int_type('a') );
  75
  76   fbin.close();
  77
  78   return test;
  79 }
  80
  81 int
  82 main()
  83 {
  84   return !test07();
  85 }