| // { dg-require-fork "" } |
| // { dg-require-mkfifo "" } |
| |
| // 2003-04-30 Petur Runolfsson <peturr02@ru.is> |
| |
| // Copyright (C) 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
| // USA. |
| |
| #include <testsuite_hooks.h> |
| #include <cstdio> |
| #include <iostream> |
| #include <unistd.h> |
| #include <signal.h> |
| #include <fcntl.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| |
| // Check that wcin.rdbuf()->sputbackc() puts characters back to stdin. |
| // If wcin.rdbuf() is a filebuf, this succeeds when stdin is a regular |
| // file, but fails otherwise, hence the named fifo. |
| void 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, "w"); |
| fputs("Whatever\n", file); |
| fflush(file); |
| s1.signal (); |
| s2.wait (); |
| fclose(file); |
| exit(0); |
| } |
| |
| freopen(name, "r", stdin); |
| s1.wait (); |
| |
| wint_t c1 = fgetwc(stdin); |
| VERIFY( c1 != WEOF ); |
| wint_t c2 = wcin.rdbuf()->sputbackc(L'a'); |
| VERIFY( c2 != WEOF ); |
| VERIFY( c2 == L'a' ); |
| |
| wint_t c3 = fgetwc(stdin); |
| VERIFY( c3 != WEOF ); |
| VERIFY( c3 == c2 ); |
| wint_t c4 = ungetwc(L'b', stdin); |
| VERIFY( c4 != WEOF ); |
| VERIFY( c4 == L'b' ); |
| |
| wint_t c5 = wcin.rdbuf()->sgetc(); |
| VERIFY( c5 != WEOF ); |
| VERIFY( c5 == c4 ); |
| s2.signal (); |
| } |
| |
| int main() |
| { |
| test01(); |
| return 0; |
| } |