1 | /* Test of fwrite() function, adapted from gnulib-tests in grep. |
2 | Copyright (C) 2011-2022 Free Software Foundation, Inc. |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either |
7 | version 2.1 of the License, or (at your option) any later version. |
8 | |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | Lesser General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; if not, see |
16 | <https://www.gnu.org/licenses/>. */ |
17 | |
18 | #include <errno.h> |
19 | #include <fcntl.h> |
20 | #include <unistd.h> |
21 | #include <stdio.h> |
22 | #include <stdlib.h> |
23 | |
24 | static int |
25 | do_test (void) |
26 | { |
27 | char tmpl[] = "/tmp/tst-fwrite-error.XXXXXX" ; |
28 | int fd = mkstemp (template: tmpl); |
29 | if (fd == -1) |
30 | { |
31 | printf (format: "mkstemp failed with errno %d\n" , errno); |
32 | return 1; |
33 | } |
34 | FILE *fp = fdopen (fd, "w" ); |
35 | if (fp == NULL) |
36 | { |
37 | printf (format: "fdopen failed with errno %d\n" , errno); |
38 | return 1; |
39 | } |
40 | |
41 | char buf[] = "world" ; |
42 | setvbuf (stream: fp, NULL, _IONBF, n: 0); |
43 | close (fd: fd); |
44 | unlink (name: tmpl); |
45 | errno = 0; |
46 | |
47 | int ret = fwrite (buf, 1, sizeof (buf), fp); |
48 | if (ret != 0) |
49 | { |
50 | printf (format: "fwrite returned %d\n" , ret); |
51 | return 1; |
52 | } |
53 | if (errno != EBADF) |
54 | { |
55 | printf (format: "Errno is not EBADF: %d\n" , errno); |
56 | return 1; |
57 | } |
58 | if (ferror (stream: fp) == 0) |
59 | { |
60 | printf (format: "ferror not set\n" ); |
61 | return 1; |
62 | } |
63 | |
64 | return 0; |
65 | } |
66 | |
67 | #define TEST_FUNCTION do_test () |
68 | #include "../test-skeleton.c" |
69 | |