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1/* Test for open_memstream BZ #21037.
2 Copyright (C) 2018-2019 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 <http://www.gnu.org/licenses/>. */
18
19#include "tst-memstream.h"
20
21static void
22mcheck_abort (enum mcheck_status ev)
23{
24 printf ("mecheck failed with status %d\n", (int) ev);
25 exit (1);
26}
27
28static int
29do_test (void)
30{
31 mcheck_pedantic (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 (&buf, &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 ("invalid-file", "r", 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 (buf);
59 }
60
61 return 0;
62}
63
64#include <support/test-driver.c>
65

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