1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
|
/* Test if ftw function doesn't leak fds.
Copyright (C) 2003-2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <fcntl.h>
#include <ftw.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
static int cb_called;
static int
cb (const char *name, const struct stat64 *st, int type)
{
return cb_called++ & 1;
}
int
main (void)
{
char name[32] = "/tmp/ftwXXXXXX", *p;
int ret, i, result = 0, fd, fd1, fd2;
if (mkdtemp (name) == NULL)
{
printf ("Couldn't make temporary directory: %m\n");
exit (EXIT_FAILURE);
}
p = strchr (name, '\0');
strcpy (p, "/1");
if (mkdir (name, 0755) < 0)
{
printf ("Couldn't make temporary subdirectory: %m\n");
exit (EXIT_FAILURE);
}
*p = '\0';
ret = ftw64 (name, cb, 20);
if (ret != 1)
{
printf ("ftw64 returned %d instead of 1", ret);
result = 1;
}
fd = open (name, O_RDONLY);
if (fd < 0)
{
printf ("open failed: %m\n");
result = 1;
}
fd1 = open (name, O_RDONLY);
if (fd1 < 0)
{
printf ("open failed: %m\n");
result = 1;
}
else
close (fd1);
if (fd >= 0)
close (fd);
for (i = 0; i < 128; ++i)
{
ret = ftw64 (name, cb, 20);
if (ret != 1)
{
printf ("ftw64 returned %d instead of 1", ret);
result = 1;
}
}
fd = open (name, O_RDONLY);
if (fd < 0)
{
printf ("open failed: %m\n");
result = 1;
}
fd2 = open (name, O_RDONLY);
if (fd2 < 0)
{
printf ("open failed: %m\n");
result = 1;
}
else
close (fd2);
if (fd >= 0)
close (fd);
if (fd2 >= fd1 + 128)
{
printf ("ftw64 leaking fds: %d -> %d\n", fd1, fd2);
result = 1;
}
if (cb_called != 129 * 2)
{
printf ("callback called %d times\n", cb_called);
result = 1;
}
strcpy (p, "/1");
rmdir (name);
*p = '\0';
rmdir (name);
return result;
}
|
