1 | /* test ftw bz26353: Check whether stack overflow occurs when the value |
2 | of the nopenfd parameter is too large. |
3 | |
4 | Copyright (C) 2020-2022 Free Software Foundation, Inc. |
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 (base: "tst-bz26353" ); |
54 | int large_nopenfd = get_large_nopenfd (); |
55 | TEST_COMPARE (ftw (tempdir, my_func, large_nopenfd), 0); |
56 | free (ptr: 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 (callback: do_ftw, NULL); |
65 | support_capture_subprocess_check (&result, context: "bz26353" , status_or_signal: 0, allowed: sc_allow_none); |
66 | support_capture_subprocess_free (&result); |
67 | return 0; |
68 | } |
69 | |
70 | #include <support/test-driver.c> |
71 | |