Subversion Repositories scarts

// { dg-require-fork "" }
// { dg-require-mkfifo "" }
 
// 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>
 
// Copyright (C) 2001, 2002, 2003, 2005 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 2, or (at your option)
// any later version.
 
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
 
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING.  If not, write to the Free
// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
// USA.
 
// 27.8.1.4 Overridden virtual functions
 
#include <fstream>
#include <unistd.h>
#include <signal.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <testsuite_hooks.h>
 
class UnderBuf : public std::filebuf
{
public:
  int_type
  pub_underflow()
  { return underflow(); }
 
  std::streamsize
  pub_showmanyc()
  { return showmanyc(); }
};
 
// libstdc++/10097
// filebuf::underflow drops characters.
void test16()
{
  using namespace std;
  using namespace __gnu_test;
  bool test __attribute__((unused)) = true;
 
  const char* name = "tmp_fifo1";
 
  signal(SIGPIPE, SIG_IGN);
  unlink(name);
 
  if (0 != mkfifo(name, S_IRWXU))
    {
      VERIFY( false );
    }
 
  semaphore s1;
  int fval = fork();
  if (fval == -1)
    {
      unlink(name);
      VERIFY( false );
    }
  else if (fval == 0)
    {
      filebuf fbout;
      fbout.open(name, ios_base::in|ios_base::out);
      VERIFY ( fbout.is_open() );
      fbout.sputn("0123456789", 10);
      fbout.pubsync();
      s1.wait ();
      fbout.close();
      exit(0);
    }
 
  UnderBuf fb;
  fb.open(name, ios_base::in);
 
  fb.sgetc();
  streamsize n = fb.pub_showmanyc();
 
  while (n > 0)
    {
      --n;
 
      UnderBuf::int_type c = fb.pub_underflow();
      VERIFY( c != UnderBuf::traits_type::eof() );
 
      fb.sbumpc();
    }
 
  fb.close();
  s1.signal ();
}
 
int main() 
{
  test16();
  return 0;
}