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93787845 | 1 | /* Test if ftw function doesn't leak fds. |
2b778ceb | 2 | Copyright (C) 2003-2021 Free Software Foundation, Inc. |
93787845 | 3 | This file is part of the GNU C Library. |
93787845 UD |
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 | |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
93787845 UD |
18 | |
19 | #include <fcntl.h> | |
20 | #include <ftw.h> | |
21 | #include <stdlib.h> | |
22 | #include <stdio.h> | |
5146ec9a | 23 | #include <string.h> |
93787845 UD |
24 | #include <sys/stat.h> |
25 | #include <unistd.h> | |
26 | ||
27 | static int cb_called; | |
28 | ||
29 | static int | |
30 | cb (const char *name, const struct stat64 *st, int type) | |
31 | { | |
32 | return cb_called++ & 1; | |
33 | } | |
34 | ||
35 | int | |
36 | main (void) | |
37 | { | |
38 | char name[32] = "/tmp/ftwXXXXXX", *p; | |
39 | int ret, i, result = 0, fd, fd1, fd2; | |
40 | ||
41 | if (mkdtemp (name) == NULL) | |
42 | { | |
43 | printf ("Couldn't make temporary directory: %m\n"); | |
44 | exit (EXIT_FAILURE); | |
45 | } | |
46 | p = strchr (name, '\0'); | |
47 | strcpy (p, "/1"); | |
48 | if (mkdir (name, 0755) < 0) | |
49 | { | |
50 | printf ("Couldn't make temporary subdirectory: %m\n"); | |
51 | exit (EXIT_FAILURE); | |
52 | } | |
53 | *p = '\0'; | |
54 | ||
55 | ret = ftw64 (name, cb, 20); | |
56 | if (ret != 1) | |
57 | { | |
58 | printf ("ftw64 returned %d instead of 1", ret); | |
59 | result = 1; | |
60 | } | |
61 | ||
62 | fd = open (name, O_RDONLY); | |
63 | if (fd < 0) | |
64 | { | |
65 | printf ("open failed: %m\n"); | |
66 | result = 1; | |
67 | } | |
68 | fd1 = open (name, O_RDONLY); | |
69 | if (fd1 < 0) | |
70 | { | |
71 | printf ("open failed: %m\n"); | |
72 | result = 1; | |
73 | } | |
74 | else | |
75 | close (fd1); | |
76 | if (fd >= 0) | |
77 | close (fd); | |
78 | ||
79 | for (i = 0; i < 128; ++i) | |
80 | { | |
81 | ret = ftw64 (name, cb, 20); | |
82 | if (ret != 1) | |
83 | { | |
84 | printf ("ftw64 returned %d instead of 1", ret); | |
85 | result = 1; | |
86 | } | |
87 | } | |
88 | ||
89 | fd = open (name, O_RDONLY); | |
90 | if (fd < 0) | |
91 | { | |
92 | printf ("open failed: %m\n"); | |
93 | result = 1; | |
94 | } | |
95 | fd2 = open (name, O_RDONLY); | |
96 | if (fd2 < 0) | |
97 | { | |
98 | printf ("open failed: %m\n"); | |
99 | result = 1; | |
100 | } | |
101 | else | |
102 | close (fd2); | |
103 | if (fd >= 0) | |
104 | close (fd); | |
105 | ||
106 | if (fd2 >= fd1 + 128) | |
107 | { | |
108 | printf ("ftw64 leaking fds: %d -> %d\n", fd1, fd2); | |
109 | result = 1; | |
110 | } | |
111 | ||
112 | if (cb_called != 129 * 2) | |
113 | { | |
114 | printf ("callback called %d times\n", cb_called); | |
115 | result = 1; | |
116 | } | |
117 | ||
118 | strcpy (p, "/1"); | |
119 | rmdir (name); | |
120 | *p = '\0'; | |
121 | rmdir (name); | |
122 | return result; | |
123 | } |