117 lines
2.5 KiB
C++
117 lines
2.5 KiB
C++
// { dg-require-fork "" }
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// { dg-require-mkfifo "" }
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// 2001-05-21 Benjamin Kosnik <bkoz@redhat.com>
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// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007
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// Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 2, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING. If not, write to the Free
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// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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// USA.
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// 27.8.1.4 Overridden virtual functions
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#include <fstream>
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#include <cstdlib>
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#include <unistd.h>
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#include <signal.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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// No asserts, avoid leaking the semaphores if a VERIFY fails.
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#undef _GLIBCXX_ASSERT
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#include <testsuite_hooks.h>
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class UnderBuf : public std::filebuf
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{
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public:
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int_type
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pub_underflow()
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{ return underflow(); }
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std::streamsize
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pub_showmanyc()
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{ return showmanyc(); }
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};
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// libstdc++/10097
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// filebuf::underflow drops characters.
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bool test16()
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{
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using namespace std;
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using namespace __gnu_test;
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bool test __attribute__((unused)) = true;
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const char* name = "tmp_fifo1";
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signal(SIGPIPE, SIG_IGN);
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unlink(name);
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if (0 != mkfifo(name, S_IRWXU))
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{
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VERIFY( false );
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}
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semaphore s1, s2;
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int fval = fork();
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if (fval == -1)
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{
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unlink(name);
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VERIFY( false );
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}
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else if (fval == 0)
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{
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filebuf fbout;
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fbout.open(name, ios_base::in|ios_base::out);
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VERIFY( fbout.is_open() );
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fbout.sputn("0123456789", 10);
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fbout.pubsync();
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s1.wait();
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fbout.close();
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s2.signal();
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exit(0);
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}
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UnderBuf fb;
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fb.open(name, ios_base::in);
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fb.sgetc();
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streamsize n = fb.pub_showmanyc();
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while (n > 0)
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{
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--n;
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UnderBuf::int_type c = fb.pub_underflow();
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VERIFY( c != UnderBuf::traits_type::eof() );
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fb.sbumpc();
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}
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fb.close();
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s1.signal();
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s2.wait();
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return test;
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}
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int main()
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{
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return !test16();
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}
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