1 | /* Test for open_memstream BZ #21037. |
2 | Copyright (C) 2018-2022 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 "tst-memstream.h" |
20 | |
21 | static void |
22 | mcheck_abort (enum mcheck_status ev) |
23 | { |
24 | printf (format: "mecheck failed with status %d\n" , (int) ev); |
25 | exit (1); |
26 | } |
27 | |
28 | static int |
29 | do_test (void) |
30 | { |
31 | mcheck_pedantic (abortfunc: mcheck_abort); |
32 | |
33 | /* Check if freopen proper fflush the stream. */ |
34 | { |
35 | CHAR_T old[] = W("old" ); |
36 | CHAR_T *buf = old; |
37 | size_t size; |
38 | |
39 | FILE *fp = OPEN_MEMSTREAM (bufloc: &buf, sizeloc: &size); |
40 | TEST_VERIFY_EXIT (fp != NULL); |
41 | |
42 | FPUTS (W("new" ), fp); |
43 | /* The stream buffer pointer should be updated with only a fflush or |
44 | fclose. */ |
45 | TEST_COMPARE (STRCMP (buf, old), 0); |
46 | |
47 | /* The old stream should be fflush the stream, even for an invalid |
48 | streams. */ |
49 | FILE *nfp = freopen (filename: "invalid-file" , modes: "r" , stream: fp); |
50 | TEST_VERIFY_EXIT (nfp == NULL); |
51 | |
52 | TEST_VERIFY (STRCMP (buf, W("new" )) == 0); |
53 | TEST_COMPARE_BLOB (buf, STRLEN (buf) * sizeof (CHAR_T), |
54 | W("new" ), STRLEN (W("new" )) * sizeof (CHAR_T)); |
55 | |
56 | TEST_COMPARE (fclose (fp), 0); |
57 | |
58 | free (ptr: buf); |
59 | } |
60 | |
61 | return 0; |
62 | } |
63 | |
64 | #include <support/test-driver.c> |
65 | |