libstdc++-v3/testsuite/27_io/basic_filebuf/close/char/4879.cc

   1 // { dg-require-fork "" }
   2 // { dg-require-mkfifo "" }
   3
   4 // Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2009
   5 // Free Software Foundation, Inc.
   6 //
   7 // This file is part of the GNU ISO C++ Library.  This library is free
   8 // software; you can redistribute it and/or modify it under the
   9 // terms of the GNU General Public License as published by the
  10 // Free Software Foundation; either version 3, or (at your option)
  11 // any later version.
  12
  13 // This library is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17
  18 // You should have received a copy of the GNU General Public License along
  19 // with this library; see the file COPYING3.  If not see
  20 // <http://www.gnu.org/licenses/>.
  21
  22 // 27.8.1.3 filebuf member functions
  23 // @require@ %-*.tst %-*.txt
  24 // @diff@ %-*.tst %-*.txt
  25
  26 // various tests for filebuf::open() and filebuf::close() including
  27 // the non-portable functionality in the libstdc++-v3 IO library
  28
  29 #include <fstream>
  30 #include <iostream>
  31 #include <cstdlib>
  32 #include <unistd.h>
  33 #include <signal.h>
  34 #include <fcntl.h>
  35 #include <sys/types.h>
  36 #include <sys/stat.h>
  37
  38 // No asserts, avoid leaking the semaphores if a VERIFY fails.
  39 #undef _GLIBCXX_ASSERT
  40
  41 #include <testsuite_hooks.h>
  42
  43 // libstdc++/2913, libstdc++/4879
  44 // John Fardo  <jfardo@laurelnetworks.com>, Brad Garcia <garsh@attbi.com>
  45 bool
  46 test_04()
  47 {
  48   using namespace __gnu_test;
  49
  50   bool test __attribute__((unused)) = true;
  51   const char* name = "tmp_fifo1";
  52   semaphore s1, s2;
  53
  54   signal(SIGPIPE, SIG_IGN);
  55
  56   unlink(name);
  57   if (0 != mkfifo(name, S_IRWXU))
  58     {
  59       std::cerr << "failed to create fifo" << std::endl;
  60       exit(-1);
  61     }
  62
  63   int fval = fork();
  64   if (fval == -1)
  65     {
  66       std::cerr << "failed to fork" << std::endl;
  67       unlink(name);
  68       return false;
  69     }
  70   else if (fval == 0)
  71     {
  72       std::ifstream ifs(name);
  73       s1.wait();
  74       ifs.close();
  75       s2.signal();
  76       exit(0);
  77     }
  78
  79   std::ofstream ofs(name);
  80   s1.signal();
  81   s2.wait();
  82   ofs.put('t');
  83
  84   /*
  85    * ISO/IED 14882:1998(E) 27.8.1.10.4
  86    *
  87    * void close();
  88    *
  89    * Effects:  Calls rdbuf()->close() and, if that function fails
  90    * (returns a null pointer), calls setstate(failbit)...
  91    */
  92   ofs.close();
  93   if (!(ofs.rdstate() & std::ios::failbit))
  94     {
  95       test = false;
  96       VERIFY( test );
  97     }
  98
  99   unlink(name);
 100
 101   return test;
 102 }
 103
 104 int
 105 main()
 106 {
 107   return !test_04();
 108 }