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
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
|
#include <dirent.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
static void prepare (void);
#define PREPARE(argc, argv) prepare ()
static int do_test (void);
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
static int dir_fd;
static void
prepare (void)
{
size_t test_dir_len = strlen (test_dir);
static const char dir_name[] = "/tst-unlinkat.XXXXXX";
size_t dirbuflen = test_dir_len + sizeof (dir_name);
char *dirbuf = malloc (dirbuflen);
if (dirbuf == NULL)
{
puts ("out of memory");
exit (1);
}
snprintf (dirbuf, dirbuflen, "%s%s", test_dir, dir_name);
if (mkdtemp (dirbuf) == NULL)
{
puts ("cannot create temporary directory");
exit (1);
}
add_temp_file (dirbuf);
dir_fd = open (dirbuf, O_RDONLY | O_DIRECTORY);
if (dir_fd == -1)
{
puts ("cannot open directory");
exit (1);
}
}
static int
do_test (void)
{
/* fdopendir takes over the descriptor, make a copy. */
int dupfd = dup (dir_fd);
if (dupfd == -1)
{
puts ("dup failed");
return 1;
}
if (lseek (dupfd, 0, SEEK_SET) != 0)
{
puts ("1st lseek failed");
return 1;
}
/* The directory should be empty safe the . and .. files. */
DIR *dir = fdopendir (dupfd);
if (dir == NULL)
{
puts ("fdopendir failed");
return 1;
}
struct dirent64 *d;
while ((d = readdir64 (dir)) != NULL)
if (strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") != 0)
{
printf ("temp directory contains file \"%s\"\n", d->d_name);
return 1;
}
closedir (dir);
/* Try to create a file. */
int fd = openat (dir_fd, "some-file", O_CREAT|O_RDWR|O_EXCL, 0666);
if (fd == -1)
{
if (errno == ENOSYS)
{
puts ("*at functions not supported");
return 0;
}
puts ("file creation failed");
return 1;
}
write (fd, "hello", 5);
close (fd);
puts ("file created");
/* fdopendir takes over the descriptor, make a copy. */
dupfd = dup (dir_fd);
if (dupfd == -1)
{
puts ("2nd dup failed");
return 1;
}
if (lseek (dupfd, 0, SEEK_SET) != 0)
{
puts ("2nd lseek failed");
return 1;
}
/* The directory should be empty safe the . and .. files. */
dir = fdopendir (dupfd);
if (dir == NULL)
{
puts ("2nd fdopendir failed");
return 1;
}
bool seen_file = false;
while ((d = readdir64 (dir)) != NULL)
if (strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") != 0)
{
if (strcmp (d->d_name, "some-file") != 0)
{
printf ("temp directory contains file \"%s\"\n", d->d_name);
return 1;
}
seen_file = true;
}
closedir (dir);
if (!seen_file)
{
puts ("file not created in correct directory");
return 1;
}
/* Remove the file now. */
if (unlinkat (dir_fd, "some-file", 0) != 0)
{
puts ("unlinkat failed");
return 1;
}
/* We won't need dir_fd anymore after this, so use it. */
if (lseek (dir_fd, 0, SEEK_SET) != 0)
{
puts ("3rd lseek failed");
return 1;
}
/* The directory should be empty safe the . and .. files. */
dir = fdopendir (dir_fd);
if (dir == NULL)
{
puts ("3rd fdopendir failed");
return 1;
}
while ((d = readdir64 (dir)) != NULL)
if (strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") != 0)
{
if (strcmp (d->d_name, "some-file") == 0)
{
puts ("some-file not removed");
return 1;
}
else
{
printf ("temp directory contains file \"%s\"\n", d->d_name);
return 1;
}
}
closedir (dir);
return 0;
}
|
