libstdc++-v3/testsuite/27_io/basic_filebuf/close/char/9964.cc

   1 // { dg-require-fork "" }
   2 // { dg-require-mkfifo "" }
   3
   4 // Copyright (C) 2001-2021 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 3, 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 COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 // 27.8.1.3 filebuf member functions
  22 // @require@ %-*.tst %-*.txt
  23 // @diff@ %-*.tst %-*.txt
  24
  25 // various tests for filebuf::open() and filebuf::close() including
  26 // the non-portable functionality in the libstdc++-v3 IO library
  27
  28 #include <fstream>
  29 #include <cstdlib>
  30 #include <unistd.h>
  31 #include <signal.h>
  32 #include <fcntl.h>
  33 #include <sys/types.h>
  34 #include <sys/stat.h>
  35
  36 #include <testsuite_hooks.h>
  37
  38 // libstdc++/9964
  39 bool test_07()
  40 {
  41   using namespace std;
  42   using namespace __gnu_test;
  43   bool test = true;
  44   semaphore s1, s2;
  45
  46   const char* name = "tmp_fifo3";
  47
  48   signal(SIGPIPE, SIG_IGN);
  49
  50   unlink(name);
  51   mkfifo(name, S_IRWXU);
  52
  53   int child = fork();
  54   test &= bool( child != -1 );
  55
  56   if (child == 0)
  57     {
  58       filebuf fbin;
  59       fbin.open(name, ios_base::in);
  60       s1.wait();
  61       fbin.close();
  62       s2.signal();
  63       exit(0);
  64     }
  65
  66   filebuf fb;
  67   filebuf* ret = fb.open(name, ios_base::in | ios_base::out);
  68   test &= bool( ret != 0 );
  69   test &= bool( fb.is_open() );
  70   s1.signal();
  71   s2.wait();
  72   fb.sputc('a');
  73
  74   ret = fb.close();
  75   test &= bool( ret != 0 );
  76   test &= bool( !fb.is_open() );
  77
  78   return test;
  79 }
  80
  81 int
  82 main()
  83 {
  84   return !test_07();
  85 }