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1 | // 2003-04-30 Petur Runolfsson <peturr02@ru.is> |
2 | ||
3 | // Copyright (C) 2003 Free Software Foundation, Inc. | |
4 | // | |
5 | // This file is part of the GNU ISO C++ Library. This library is free | |
6 | // software; you can redistribute it and/or modify it under the | |
7 | // terms of the GNU General Public License as published by the | |
8 | // Free Software Foundation; either version 2, or (at your option) | |
9 | // any later version. | |
10 | ||
11 | // This library is distributed in the hope that it will be useful, | |
12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | // GNU General Public License for more details. | |
15 | ||
16 | // You should have received a copy of the GNU General Public License along | |
17 | // with this library; see the file COPYING. If not, write to the Free | |
18 | // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, | |
19 | // USA. | |
20 | ||
8b87d3fa DB |
21 | // XXX cygwin does not support mkfifo |
22 | // { dg-do run { xfail *-*-cygwin* } } | |
23 | ||
51ff8149 BK |
24 | #include <testsuite_hooks.h> |
25 | #include <cstdio> | |
26 | #include <iostream> | |
27 | #include <unistd.h> | |
28 | #include <signal.h> | |
29 | #include <fcntl.h> | |
30 | #include <sys/types.h> | |
31 | #include <sys/stat.h> | |
32 | ||
33 | // Check that cin.rdbuf()->sputbackc() puts characters back to stdin. | |
34 | // If cin.rdbuf() is a filebuf, this succeeds when stdin is a regular | |
35 | // file, but fails otherwise, hence the named fifo. | |
36 | void test01() | |
37 | { | |
38 | using namespace std; | |
39 | ||
11f10e6b | 40 | bool test __attribute__((unused)) = true; |
51ff8149 BK |
41 | |
42 | const char* name = "tmp_fifo5"; | |
43 | ||
44 | signal(SIGPIPE, SIG_IGN); | |
45 | ||
46 | unlink(name); | |
47 | mkfifo(name, S_IRWXU); | |
48 | ||
49 | int child = fork(); | |
50 | VERIFY( child != -1 ); | |
51 | ||
52 | if (child == 0) | |
53 | { | |
54 | sleep(1); | |
55 | FILE* file = fopen(name, "w"); | |
56 | fputs("Whatever\n", file); | |
57 | fflush(file); | |
58 | sleep(2); | |
59 | fclose(file); | |
60 | exit(0); | |
61 | } | |
62 | ||
63 | freopen(name, "r", stdin); | |
64 | sleep(2); | |
65 | ||
66 | int c1 = fgetc(stdin); | |
67 | VERIFY( c1 != EOF ); | |
68 | int c2 = cin.rdbuf()->sputbackc('a'); | |
69 | VERIFY( c2 != EOF ); | |
70 | VERIFY( c2 == 'a' ); | |
71 | ||
72 | int c3 = fgetc(stdin); | |
73 | VERIFY( c3 != EOF ); | |
74 | VERIFY( c3 == c2 ); | |
75 | int c4 = ungetc('b', stdin); | |
76 | VERIFY( c4 != EOF ); | |
77 | VERIFY( c4 == 'b' ); | |
78 | ||
79 | int c5 = cin.rdbuf()->sgetc(); | |
80 | VERIFY( c5 != EOF ); | |
81 | VERIFY( c5 == c4 ); | |
82 | } | |
83 | ||
84 | int main() | |
85 | { | |
86 | test01(); | |
87 | return 0; | |
88 | } |