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2b766585 SP |
1 | /* Verify that print functions return error when there is an I/O error. |
2 | ||
d4697bc9 | 3 | Copyright (C) 2005-2014 Free Software Foundation, Inc. |
2b766585 SP |
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 | |
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. | |
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 | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public | |
17 | License along with the GNU C Library; if not, see | |
18 | <http://www.gnu.org/licenses/>. */ | |
19 | ||
34c5e4a1 UD |
20 | #include <errno.h> |
21 | #include <error.h> | |
22 | #include <stdio.h> | |
23 | #include <stdlib.h> | |
24 | #include <unistd.h> | |
25 | ||
26 | ||
27 | static int | |
28 | do_test (void) | |
29 | { | |
30 | char tmpl[] = "/tmp/tst-put-error.XXXXXX"; | |
31 | int fd = mkstemp (tmpl); | |
32 | if (fd == -1) | |
33 | error (EXIT_FAILURE, errno, "cannot create temporary file"); | |
34 | FILE *fp = fdopen (fd, "w"); | |
35 | if (fp == NULL) | |
36 | error (EXIT_FAILURE, errno, "fdopen"); | |
7728c574 SP |
37 | |
38 | /* All of the tests below verify that flushing buffers result in failure of | |
39 | the fprintf calls. We ensure that the buffer is flushed at the end of | |
40 | each fprintf call by doing two things - setting the file pointer to | |
41 | line-buffered so that it is flushed whenever it encounters a newline and | |
42 | then ensuring that there is a newline in each of the format strings we | |
43 | pass to fprintf. */ | |
44 | ||
34c5e4a1 UD |
45 | setlinebuf (fp); |
46 | close (fd); | |
dbc92dc6 | 47 | unlink (tmpl); |
7728c574 | 48 | |
34c5e4a1 UD |
49 | int n = fprintf (fp, "hello world\n"); |
50 | printf ("fprintf = %d\n", n); | |
51 | if (n >= 0) | |
52 | error (EXIT_FAILURE, 0, "first fprintf succeeded"); | |
7728c574 | 53 | |
34c5e4a1 UD |
54 | n = fprintf (fp, "hello world\n"); |
55 | printf ("fprintf = %d\n", n); | |
56 | if (n >= 0) | |
57 | error (EXIT_FAILURE, 0, "second fprintf succeeded"); | |
2b766585 SP |
58 | |
59 | /* Padded printing takes a different code path. */ | |
7728c574 | 60 | n = fprintf (fp, "%100s\n", "foo"); |
2b766585 SP |
61 | printf ("fprintf = %d\n", n); |
62 | if (n >= 0) | |
63 | error (EXIT_FAILURE, 0, "padded fprintf succeeded"); | |
64 | ||
34c5e4a1 UD |
65 | return 0; |
66 | } | |
67 | ||
68 | #define TEST_FUNCTION do_test () | |
69 | #include "../test-skeleton.c" |