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[/] [scarts/] [trunk/] [toolchain/] [scarts-gcc/] [gcc-4.1.1/] [libstdc++-v3/] [testsuite/] [27_io/] [basic_filebuf/] [underflow/] [char/] [10097.cc] - Rev 19
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// { 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; }