1/* Make sure blank lines does not cause memory corruption BZ #18887.
2
3 Copyright (C) 2009-2022 Free Software Foundation, Inc.
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 <https://www.gnu.org/licenses/>. */
19
20#include <mntent.h>
21#include <stdio.h>
22#include <string.h>
23
24/* Make sure blank lines don't trigger memory corruption. This doesn't happen
25 for all targets though, so it's a best effort test BZ #18887. */
26static int
27do_test (void)
28{
29 FILE *fp;
30
31 fp = tmpfile ();
32 fputs ("\n \n/foo\\040dir /bar\\040dir auto bind \t \n", fp);
33 rewind (fp);
34
35 /* The corruption happens here ... */
36 getmntent (stream: fp);
37 /* ... but trigers here. */
38 endmntent (stream: fp);
39
40 /* If the test failed, we would crash, and not hit this point. */
41 return 0;
42}
43
44#define TEST_FUNCTION do_test ()
45#include "../test-skeleton.c"
46

source code of glibc/misc/tst-mntent-blank-corrupt.c