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1 | // 2001-05-21 Benjamin Kosnik <bkoz@redhat.com> |
2 | ||
3 | // Copyright (C) 2001, 2002, 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 | ||
21 | // 27.8.1.4 Overridden virtual functions | |
22 | ||
23 | #include <fstream> | |
24 | #include <unistd.h> | |
25 | #include <signal.h> | |
26 | #include <fcntl.h> | |
27 | #include <sys/types.h> | |
28 | #include <sys/stat.h> | |
29 | #include <testsuite_hooks.h> | |
30 | ||
31 | class UnderBuf : public std::filebuf | |
32 | { | |
33 | public: | |
34 | int_type | |
35 | pub_underflow() | |
36 | { return underflow(); } | |
37 | ||
38 | std::streamsize | |
39 | pub_showmanyc() | |
40 | { return showmanyc(); } | |
41 | }; | |
42 | ||
43 | // libstdc++/10097 | |
44 | // filebuf::underflow drops characters. | |
45 | void test16() | |
46 | { | |
47 | using namespace std; | |
ea1ea21a | 48 | using namespace __gnu_test; |
11f10e6b | 49 | bool test __attribute__((unused)) = true; |
23cac885 BK |
50 | |
51 | const char* name = "tmp_fifo1"; | |
52 | ||
53 | signal(SIGPIPE, SIG_IGN); | |
54 | unlink(name); | |
55 | ||
ea1ea21a | 56 | if (0 != try_mkfifo(name, S_IRWXU)) |
23cac885 BK |
57 | { |
58 | VERIFY( false ); | |
59 | } | |
60 | ||
61 | int fval = fork(); | |
62 | if (fval == -1) | |
63 | { | |
64 | unlink(name); | |
65 | VERIFY( false ); | |
66 | } | |
67 | else if (fval == 0) | |
68 | { | |
69 | filebuf fbout; | |
70 | fbout.open(name, ios_base::out); | |
71 | fbout.sputn("0123456789", 10); | |
72 | fbout.pubsync(); | |
73 | sleep(2); | |
74 | fbout.close(); | |
75 | exit(0); | |
76 | } | |
77 | ||
78 | UnderBuf fb; | |
79 | fb.open(name, ios_base::in); | |
80 | sleep(1); | |
81 | ||
82 | fb.sgetc(); | |
83 | streamsize n = fb.pub_showmanyc(); | |
84 | ||
85 | while (n > 0) | |
86 | { | |
87 | --n; | |
88 | ||
89 | UnderBuf::int_type c = fb.pub_underflow(); | |
90 | VERIFY( c != UnderBuf::traits_type::eof() ); | |
91 | ||
92 | fb.sbumpc(); | |
93 | } | |
94 | ||
95 | fb.close(); | |
96 | } | |
97 | ||
11f10e6b | 98 | int main() |
23cac885 BK |
99 | { |
100 | test16(); | |
101 | return 0; | |
102 | } |