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106ff085 XN |
1 | /* test ftw bz26353: Check whether stack overflow occurs when the value |
2 | of the nopenfd parameter is too large. | |
3 | ||
6d7e8eda | 4 | Copyright (C) 2020-2023 Free Software Foundation, Inc. |
106ff085 XN |
5 | This file is part of the GNU C Library. |
6 | ||
7 | The GNU C Library is free software; you can redistribute it and/or | |
8 | modify it under the terms of the GNU Lesser General Public | |
9 | License as published by the Free Software Foundation; either | |
10 | version 2.1 of the License, or (at your option) any later version. | |
11 | ||
12 | The GNU C Library is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | Lesser General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU Lesser General Public | |
18 | License along with the GNU C Library; if not, see | |
19 | <https://www.gnu.org/licenses/>. */ | |
20 | ||
21 | #include <stdlib.h> | |
22 | #include <stdio.h> | |
23 | #include <ftw.h> | |
24 | #include <errno.h> | |
25 | #include <sys/resource.h> | |
26 | ||
27 | #include <support/temp_file.h> | |
28 | #include <support/capture_subprocess.h> | |
29 | #include <support/check.h> | |
30 | ||
31 | static int | |
32 | my_func (const char *file, const struct stat *sb, int flag) | |
33 | { | |
34 | return 0; | |
35 | } | |
36 | ||
37 | static int | |
38 | get_large_nopenfd (void) | |
39 | { | |
40 | struct rlimit r; | |
41 | TEST_COMPARE (getrlimit (RLIMIT_STACK, &r), 0); | |
42 | if (r.rlim_cur == RLIM_INFINITY) | |
43 | { | |
44 | r.rlim_cur = 8 * 1024 * 1024; | |
45 | TEST_COMPARE (setrlimit (RLIMIT_STACK, &r), 0); | |
46 | } | |
47 | return (int) r.rlim_cur; | |
48 | } | |
49 | ||
50 | static void | |
51 | do_ftw (void *unused) | |
52 | { | |
53 | char *tempdir = support_create_temp_directory ("tst-bz26353"); | |
54 | int large_nopenfd = get_large_nopenfd (); | |
55 | TEST_COMPARE (ftw (tempdir, my_func, large_nopenfd), 0); | |
56 | free (tempdir); | |
57 | } | |
58 | ||
59 | /* Check whether stack overflow occurs. */ | |
60 | static int | |
61 | do_test (void) | |
62 | { | |
63 | struct support_capture_subprocess result; | |
64 | result = support_capture_subprocess (do_ftw, NULL); | |
65 | support_capture_subprocess_check (&result, "bz26353", 0, sc_allow_none); | |
66 | support_capture_subprocess_free (&result); | |
67 | return 0; | |
68 | } | |
69 | ||
70 | #include <support/test-driver.c> |