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
|
#include <dirent.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include <support/xunistd.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-linkat.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;
}
xwrite (fd, "hello", 5);
puts ("file created");
struct stat64 st1;
if (fstat64 (fd, &st1) != 0)
{
puts ("fstat64 failed");
return 1;
}
close (fd);
if (linkat (dir_fd, "some-file", dir_fd, "another-file", 0) != 0)
{
puts ("symlinkat failed");
return 1;
}
struct stat64 st2;
if (fstatat64 (dir_fd, "some-file", &st2, 0) != 0)
{
puts ("fstatat64 failed");
return 1;
}
if (st1.st_dev != st2.st_dev || st1.st_ino != st2.st_ino)
{
puts ("file changed after symlinkat");
return 1;
}
if (fstatat64 (dir_fd, "another-file", &st2, AT_SYMLINK_NOFOLLOW) != 0)
{
puts ("2nd fstatat64 failed");
return 1;
}
if (S_ISLNK (st2.st_mode))
{
puts ("2nd fstatat64 shows file is a symlink");
return 1;
}
if (st1.st_dev != st2.st_dev
|| st1.st_ino != st2.st_ino
|| st1.st_size != st2.st_size)
{
puts ("stat results for linked file do not match");
return 1;
}
if (fstatat64 (dir_fd, "another-file", &st2, 0) != 0)
{
puts ("3rd fstatat64 failed");
return 1;
}
if (st1.st_dev != st2.st_dev
|| st1.st_ino != st2.st_ino
|| st1.st_size != st2.st_size)
{
puts ("stat results do not match");
return 1;
}
if (unlinkat (dir_fd, "another-file", 0) != 0)
{
puts ("unlinkat failed");
return 1;
}
if (unlinkat (dir_fd, "some-file", 0) != 0)
{
puts ("2nd unlinkat failed");
return 1;
}
close (dir_fd);
return 0;
}
|
