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1 | // { dg-require-fork "" } |
2 | // { dg-require-mkfifo "" } | |
3 | ||
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4 | // 2003-04-30 Petur Runolfsson <peturr02@ru.is> |
5 | ||
a945c346 | 6 | // Copyright (C) 2003-2024 Free Software Foundation, Inc. |
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7 | // |
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 | |
748086b7 | 11 | // Free Software Foundation; either version 3, or (at your option) |
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12 | // any later version. |
13 | ||
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. | |
18 | ||
19 | // You should have received a copy of the GNU General Public License along | |
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20 | // with this library; see the file COPYING3. If not see |
21 | // <http://www.gnu.org/licenses/>. | |
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22 | |
23 | #include <testsuite_hooks.h> | |
24 | #include <cstdio> | |
debac9f4 | 25 | #include <cstdlib> |
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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. | |
9339bda8 | 36 | bool test01() |
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37 | { |
38 | using namespace std; | |
ea1ea21a | 39 | using namespace __gnu_test; |
51ff8149 | 40 | |
118c8424 | 41 | bool test = true; |
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42 | |
43 | const char* name = "tmp_fifo5"; | |
44 | ||
45 | signal(SIGPIPE, SIG_IGN); | |
46 | ||
47 | unlink(name); | |
34f4edf8 | 48 | mkfifo(name, S_IRWXU); |
8f1032c1 | 49 | semaphore s1, s2; |
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50 | |
51 | int child = fork(); | |
118c8424 | 52 | test &= bool( child != -1 ); |
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53 | |
54 | if (child == 0) | |
55 | { | |
f196bdc4 | 56 | FILE* file = fopen(name, "r+"); |
118c8424 | 57 | test &= bool( file != 0 ); |
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58 | fputs("Whatever\n", file); |
59 | fflush(file); | |
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60 | s1.signal(); |
61 | s2.wait(); | |
51ff8149 | 62 | fclose(file); |
189cd505 | 63 | s1.signal(); |
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64 | exit(0); |
65 | } | |
189cd505 | 66 | |
118c8424 | 67 | test &= bool( freopen(name, "r", stdin) ); |
189cd505 | 68 | s1.wait(); |
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69 | |
70 | int c1 = fgetc(stdin); | |
118c8424 | 71 | test &= bool( c1 != EOF ); |
51ff8149 | 72 | int c2 = cin.rdbuf()->sputbackc('a'); |
118c8424 PC |
73 | test &= bool( c2 != EOF ); |
74 | test &= bool( c2 == 'a' ); | |
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75 | |
76 | int c3 = fgetc(stdin); | |
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77 | test &= bool( c3 != EOF ); |
78 | test &= bool( c3 == c2 ); | |
51ff8149 | 79 | int c4 = ungetc('b', stdin); |
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80 | test &= bool( c4 != EOF ); |
81 | test &= bool( c4 == 'b' ); | |
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82 | |
83 | int c5 = cin.rdbuf()->sgetc(); | |
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84 | test &= bool( c5 != EOF ); |
85 | test &= bool( c5 == c4 ); | |
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86 | s2.signal(); |
87 | s1.wait(); | |
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88 | |
89 | return test; | |
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90 | } |
91 | ||
92 | int main() | |
93 | { | |
9339bda8 | 94 | return !test01(); |
51ff8149 | 95 | } |