1 // { dg-require-fork "" }
2 // { dg-require-mkfifo "" }
4 // 2003-04-30 Petur Runolfsson <peturr02@ru.is>
6 // Copyright (C) 2003-2018 Free Software Foundation, Inc.
8 // This file is part of the GNU ISO C++ Library. This library is free
9 // software; you can redistribute it and/or modify it under the
10 // terms of the GNU General Public License as published by the
11 // Free Software Foundation; either version 3, or (at your option)
14 // This library is distributed in the hope that it will be useful,
15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 // GNU General Public License for more details.
19 // You should have received a copy of the GNU General Public License along
20 // with this library; see the file COPYING3. If not see
21 // <http://www.gnu.org/licenses/>.
23 #include <testsuite_hooks.h>
30 #include <sys/types.h>
33 // Check that wcin.rdbuf()->sputbackc() puts characters back to stdin.
34 // If wcin.rdbuf() is a filebuf, this succeeds when stdin is a regular
35 // file, but fails otherwise, hence the named fifo.
39 using namespace __gnu_test
;
43 const char* name
= "tmp_fifo5";
45 signal(SIGPIPE
, SIG_IGN
);
48 mkfifo(name
, S_IRWXU
);
52 test
&= bool( child
!= -1 );
56 FILE* file
= fopen(name
, "w");
57 fputs("Whatever\n", file
);
66 test
&= bool( freopen(name
, "r", stdin
) );
69 wint_t c1
= fgetwc(stdin
);
70 test
&= bool( c1
!= WEOF
);
71 wint_t c2
= wcin
.rdbuf()->sputbackc(L
'a');
72 test
&= bool( c2
!= WEOF
);
73 test
&= bool( c2
== L
'a' );
75 wint_t c3
= fgetwc(stdin
);
76 test
&= bool( c3
!= WEOF
);
77 test
&= bool( c3
== c2
);
78 wint_t c4
= ungetwc(L
'b', stdin
);
79 test
&= bool( c4
!= WEOF
);
80 test
&= bool( c4
== L
'b' );
82 wint_t c5
= wcin
.rdbuf()->sgetc();
83 test
&= bool( c5
!= WEOF
);
84 test
&= bool( c5
== c4
);