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// { dg-require-fork "" }
// { dg-require-mkfifo "" }
// 2001-05-21 Benjamin Kosnik <bkoz@redhat.com>
// Copyright (C) 2001-2018 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 3, 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 COPYING3. If not see
// <http://www.gnu.org/licenses/>.
// 27.8.1.4 Overridden virtual functions
#include <fstream>
#include <cstdlib>
#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.
bool test16()
{
using namespace std;
using namespace __gnu_test;
bool test = true;
const char* name = "tmp_fifo1";
signal(SIGPIPE, SIG_IGN);
unlink(name);
if (0 != mkfifo(name, S_IRWXU))
{
test = false;
}
semaphore s1, s2;
int fval = fork();
if (fval == -1)
{
unlink(name);
test = false;
}
else if (fval == 0)
{
filebuf fbout;
fbout.open(name, ios_base::in|ios_base::out);
test &= bool( fbout.is_open() );
fbout.sputn("0123456789", 10);
fbout.pubsync();
s1.wait();
fbout.close();
s2.signal();
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();
test &= bool( c != UnderBuf::traits_type::eof() );
fb.sbumpc();
}
fb.close();
s1.signal();
s2.wait();
return test;
}
int main()
{
return !test16();
}
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