1 | /* Test that _IO_wfile_sync does not crash (bug 20568). |
2 | Copyright (C) 2019-2022 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <fcntl.h> |
20 | #include <locale.h> |
21 | #include <stdio.h> |
22 | #include <stdlib.h> |
23 | #include <string.h> |
24 | #include <wchar.h> |
25 | #include <support/check.h> |
26 | #include <support/xstdio.h> |
27 | #include <support/xunistd.h> |
28 | #include <support/temp_file.h> |
29 | |
30 | static const char test_data[] = "This is a test of _IO_wfile_sync." ; |
31 | |
32 | static int |
33 | do_test (void) |
34 | { |
35 | static char *infile; |
36 | int infd; |
37 | FILE *infp; |
38 | |
39 | infd = create_temp_file (base: "tst-wfile-sync-in-" , filename: &infile); |
40 | xwrite (infd, test_data, strlen (test_data)); |
41 | xclose (infd); |
42 | |
43 | infd = xopen (path: infile, O_RDONLY, 0); |
44 | infp = fdopen (infd, "r" ); |
45 | |
46 | TEST_VERIFY_EXIT (setlocale (LC_ALL, "de_DE.UTF-8" ) != NULL); |
47 | /* Fill the stdio buffer and advance the read pointer. */ |
48 | TEST_VERIFY_EXIT (fgetwc (infp) != WEOF); |
49 | /* This calls _IO_wfile_sync, it should not crash. */ |
50 | TEST_VERIFY_EXIT (setvbuf (infp, NULL, _IONBF, 0) == 0); |
51 | /* Verify that the external file offset has been synchronized. */ |
52 | TEST_COMPARE (xlseek (infd, 0, SEEK_CUR), 1); |
53 | |
54 | fclose (infp); |
55 | free (ptr: infile); |
56 | |
57 | return 0; |
58 | } |
59 | |
60 | #include <support/test-driver.c> |
61 | |