| // { dg-require-fork "" } |
| // { dg-require-mkfifo "" } |
| |
| // 2001-05-21 Benjamin Kosnik <bkoz@redhat.com> |
| |
| // Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2009 |
| // 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> |
| |
| // No asserts, avoid leaking the semaphores if a VERIFY fails. |
| #undef _GLIBCXX_ASSERT |
| |
| #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 __attribute__((unused)) = true; |
| |
| const char* name = "tmp_fifo1"; |
| |
| signal(SIGPIPE, SIG_IGN); |
| unlink(name); |
| |
| if (0 != mkfifo(name, S_IRWXU)) |
| { |
| VERIFY( false ); |
| } |
| |
| semaphore s1, s2; |
| 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(); |
| 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(); |
| VERIFY( c != UnderBuf::traits_type::eof() ); |
| |
| fb.sbumpc(); |
| } |
| |
| fb.close(); |
| s1.signal(); |
| s2.wait(); |
| |
| return test; |
| } |
| |
| int main() |
| { |
| return !test16(); |
| } |