1 | /* Test readdir64 compatibility symbol. |
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 <dirent.h> |
20 | #include <dlfcn.h> |
21 | #include <errno.h> |
22 | #include <shlib-compat.h> |
23 | #include <stdbool.h> |
24 | #include <stdio.h> |
25 | #include <string.h> |
26 | #include <support/check.h> |
27 | |
28 | /* Copied from <olddirent.h>. */ |
29 | struct __old_dirent64 |
30 | { |
31 | __ino_t d_ino; |
32 | __off64_t d_off; |
33 | unsigned short int d_reclen; |
34 | unsigned char d_type; |
35 | char d_name[256]; |
36 | }; |
37 | |
38 | typedef struct __old_dirent64 *(*compat_readdir64_type) (DIR *); |
39 | |
40 | struct __old_dirent64 *compat_readdir64 (DIR *); |
41 | compat_symbol_reference (libc, compat_readdir64, readdir64, GLIBC_2_1); |
42 | |
43 | static int |
44 | do_test (void) |
45 | { |
46 | /* Directory stream using the non-compat readdir64 symbol. The test |
47 | checks against this. */ |
48 | DIR *dir_reference = opendir (name: "." ); |
49 | TEST_VERIFY_EXIT (dir_reference != NULL); |
50 | DIR *dir_test = opendir (name: "." ); |
51 | TEST_VERIFY_EXIT (dir_test != NULL); |
52 | |
53 | /* This loop assumes that the enumeration order is consistent for |
54 | two different handles. Nothing should write to the current |
55 | directory (in the source tree) while this test runs, so there |
56 | should not be any difference due to races. */ |
57 | size_t count = 0; |
58 | while (true) |
59 | { |
60 | errno = 0; |
61 | struct dirent64 *entry_reference = readdir64 (dirp: dir_reference); |
62 | if (entry_reference == NULL && errno != 0) |
63 | FAIL_EXIT1 ("readdir64 entry %zu: %m\n" , count); |
64 | struct __old_dirent64 *entry_test = compat_readdir64 (dir_test); |
65 | if (entry_reference == NULL) |
66 | { |
67 | if (errno == EOVERFLOW) |
68 | { |
69 | TEST_VERIFY (entry_reference->d_ino |
70 | != (__ino_t) entry_reference->d_ino); |
71 | printf (format: "info: inode number overflow at entry %zu\n" , count); |
72 | break; |
73 | } |
74 | if (errno != 0) |
75 | FAIL_EXIT1 ("compat readdir64 entry %zu: %m\n" , count); |
76 | } |
77 | |
78 | /* Check that both streams end at the same time. */ |
79 | if (entry_reference == NULL) |
80 | { |
81 | TEST_VERIFY (entry_test == NULL); |
82 | break; |
83 | } |
84 | else |
85 | TEST_VERIFY_EXIT (entry_test != NULL); |
86 | |
87 | /* d_off is never zero because it is the offset of the next |
88 | entry (not the current entry). */ |
89 | TEST_VERIFY (entry_reference->d_off > 0); |
90 | |
91 | /* Check that the entries are the same. */ |
92 | TEST_COMPARE_BLOB (entry_reference->d_name, |
93 | strlen (entry_reference->d_name), |
94 | entry_test->d_name, strlen (entry_test->d_name)); |
95 | TEST_COMPARE (entry_reference->d_ino, entry_test->d_ino); |
96 | TEST_COMPARE (entry_reference->d_off, entry_test->d_off); |
97 | TEST_COMPARE (entry_reference->d_type, entry_test->d_type); |
98 | TEST_COMPARE (entry_reference->d_reclen, entry_test->d_reclen); |
99 | |
100 | ++count; |
101 | } |
102 | printf (format: "info: %zu directory entries found\n" , count); |
103 | TEST_VERIFY (count >= 3); /* ".", "..", and some source files. */ |
104 | |
105 | TEST_COMPARE (closedir (dir_test), 0); |
106 | TEST_COMPARE (closedir (dir_reference), 0); |
107 | return 0; |
108 | } |
109 | |
110 | #include <support/test-driver.c> |
111 | |