gomp-20050608-branch/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, 2005 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 2, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING.  If not, write to the Free
  19 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  20 // USA.
  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 <unistd.h>
  32 #include <signal.h>
  33 #include <fcntl.h>
  34 #include <sys/types.h>
  35 #include <sys/stat.h>
  36 #include <testsuite_hooks.h>
  37
  38 // libstdc++/2913, libstdc++/4879
  39 // John Fardo  <jfardo@laurelnetworks.com>, Brad Garcia <garsh@attbi.com>
  40 void
  41 test_04()
  42 {
  43   using namespace __gnu_test;
  44
  45   bool test __attribute__((unused)) = true;
  46   const char* name = "tmp_fifo1";
  47   semaphore s1, s2;
  48
  49   signal(SIGPIPE, SIG_IGN);
  50
  51   unlink(name);
  52   if (0 != mkfifo(name, S_IRWXU))
  53     {
  54       std::cerr << "failed to create fifo" << std::endl;
  55       exit(-1);
  56     }
  57
  58   int fval = fork();
  59   if (fval == -1)
  60     {
  61       std::cerr << "failed to fork" << std::endl;
  62       unlink(name);
  63       exit(-1);
  64     }
  65   else if (fval == 0)
  66     {
  67       std::ifstream ifs(name);
  68       s1.wait ();
  69       ifs.close();
  70       s2.signal ();
  71       exit(0);
  72     }
  73
  74   std::ofstream ofs(name);
  75   s1.signal ();
  76   s2.wait ();
  77   ofs.put('t');
  78
  79   /*
  80    * ISO/IED 14882:1998(E) 27.8.1.10.4
  81    *
  82    * void close();
  83    *
  84    * Effects:  Calls rdbuf()->close() and, if that function fails
  85    * (returns a null pointer), calls setstate(failbit)...
  86    */
  87   ofs.close();
  88   if (!(ofs.rdstate() & std::ios::failbit))
  89     {
  90       test = false;
  91       VERIFY( test );
  92       unlink(name);
  93       exit(-1);
  94     }
  95
  96   unlink(name);
  97 }
  98
  99 int
 100 main()
 101 {
 102   test_04();
 103   return 0;
 104 }
 105
 106