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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [libstdc++-v3/] [testsuite/] [27_io/] [objects/] [char/] [9661-1.cc] - Rev 424
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// { dg-require-fork "" } // { dg-require-mkfifo "" } // 2003-04-30 Petur Runolfsson <peturr02@ru.is> // Copyright (C) 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/>. // No asserts, avoid leaking the semaphores if a VERIFY fails. #undef _GLIBCXX_ASSERT #include <testsuite_hooks.h> #include <cstdio> #include <cstdlib> #include <iostream> #include <unistd.h> #include <signal.h> #include <fcntl.h> #include <sys/types.h> #include <sys/stat.h> // Check that cin.rdbuf()->sputbackc() puts characters back to stdin. // If cin.rdbuf() is a filebuf, this succeeds when stdin is a regular // file, but fails otherwise, hence the named fifo. bool test01() { using namespace std; using namespace __gnu_test; bool test __attribute__((unused)) = true; const char* name = "tmp_fifo5"; signal(SIGPIPE, SIG_IGN); unlink(name); mkfifo(name, S_IRWXU); semaphore s1, s2; int child = fork(); VERIFY( child != -1 ); if (child == 0) { FILE* file = fopen(name, "r+"); VERIFY( file != NULL ); fputs("Whatever\n", file); fflush(file); s1.signal(); s2.wait(); fclose(file); s1.signal(); exit(0); } freopen(name, "r", stdin); s1.wait(); int c1 = fgetc(stdin); VERIFY( c1 != EOF ); int c2 = cin.rdbuf()->sputbackc('a'); VERIFY( c2 != EOF ); VERIFY( c2 == 'a' ); int c3 = fgetc(stdin); VERIFY( c3 != EOF ); VERIFY( c3 == c2 ); int c4 = ungetc('b', stdin); VERIFY( c4 != EOF ); VERIFY( c4 == 'b' ); int c5 = cin.rdbuf()->sgetc(); VERIFY( c5 != EOF ); VERIFY( c5 == c4 ); s2.signal(); s1.wait(); return test; } int main() { return !test01(); }