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28f540f4 | 1 | /* Regression test for reported old bug that errno is clobbered |
77a58cad | 2 | by the first successful output to a stream on an unseekable object. |
b168057a | 3 | Copyright (C) 1995-2015 Free Software Foundation, Inc. |
c84142e8 UD |
4 | This file is part of the GNU C Library. |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
7 | modify it under the terms of the GNU Lesser General Public |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
c84142e8 UD |
10 | |
11 | The GNU C 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 GNU | |
41bdb6e2 | 14 | Lesser General Public License for more details. |
c84142e8 | 15 | |
41bdb6e2 | 16 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
17 | License along with the GNU C Library; if not, see |
18 | <http://www.gnu.org/licenses/>. */ | |
28f540f4 RM |
19 | |
20 | #include <errno.h> | |
21 | #include <stdio.h> | |
22 | #include <unistd.h> | |
23 | ||
24 | int | |
25 | main (void) | |
26 | { | |
27 | int fd[2]; | |
28 | FILE *f; | |
29 | ||
30 | /* Get a stream that cannot seek. */ | |
31 | ||
32 | if (pipe (fd)) | |
33 | { | |
34 | perror ("pipe"); | |
35 | return 1; | |
36 | } | |
37 | f = fdopen (fd[1], "w"); | |
38 | if (f == NULL) | |
39 | { | |
40 | perror ("fdopen"); | |
41 | return 1; | |
42 | } | |
43 | ||
44 | errno = 0; | |
77a58cad | 45 | if (fputs ("fnord", f) == EOF) |
28f540f4 RM |
46 | { |
47 | perror ("fputs"); | |
48 | return 1; | |
49 | } | |
50 | ||
51 | if (errno) | |
52 | { | |
53 | perror ("errno gratuitously set -- TEST FAILED"); | |
54 | return 1; | |
55 | } | |
56 | ||
57 | puts ("Test succeeded."); | |
58 | return 0; | |
59 | } |