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// { dg-require-fork "" }

// { dg-require-mkfifo "" }

// 2006-03-22  Paolo Carlini  <pcarlini@suse.de>

// Copyright (C) 2006 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.

#include <testsuite_hooks.h>

#include <fstream>

#include <sstream>

#include <unistd.h>

#include <signal.h>

#include <fcntl.h>

#include <sys/types.h>

#include <sys/stat.h>

// libstdc++/26777

void test01()

{

  using namespace std;

  using namespace __gnu_test;

  bool test __attribute__((unused)) = true;

  const char* name = "tmp_fifo6";

  signal(SIGPIPE, SIG_IGN);

  unlink(name);

  mkfifo(name, S_IRWXU);

  semaphore s1, s2;

  int child = fork();

  VERIFY( child != -1 );

  if (child == 0)

    {

      filebuf fbout;

      fbout.open(name, ios_base::in | ios_base::out);

      VERIFY( fbout.is_open() );

      fbout.sputn("Whatever", 8);

      fbout.pubsync();

      s1.signal();

      s2.wait();

      fbout.close();

      s1.signal();

      exit(0);

    }

  filebuf fbin;

  fbin.open(name, ios::in);

  s1.wait();

  fbin.sgetc();

  fbin.pubseekoff(0, ios::cur, ios::in);

  s2.signal();

  s1.wait();

  ostringstream oss;

  oss << &fbin;

  fbin.close();

  VERIFY( oss.str() == "Whatever" );

}

int main()

{

  test01();

  return 0;

}