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48a1d526 UD |
1 | #include <dirent.h> |
2 | #include <fcntl.h> | |
3 | #include <stdio.h> | |
4 | #include <stdlib.h> | |
5 | #include <string.h> | |
6 | #include <unistd.h> | |
7 | ||
8 | ||
9 | static void prepare (void); | |
10 | #define PREPARE(argc, argv) prepare () | |
11 | ||
12 | static int do_test (void); | |
13 | #define TEST_FUNCTION do_test () | |
14 | ||
15 | #include "../test-skeleton.c" | |
16 | ||
17 | static int dir_fd; | |
18 | ||
19 | static void | |
20 | prepare (void) | |
21 | { | |
22 | size_t test_dir_len = strlen (test_dir); | |
23 | static const char dir_name[] = "/tst-linkat.XXXXXX"; | |
24 | ||
25 | size_t dirbuflen = test_dir_len + sizeof (dir_name); | |
26 | char *dirbuf = malloc (dirbuflen); | |
27 | if (dirbuf == NULL) | |
28 | { | |
29 | puts ("out of memory"); | |
30 | exit (1); | |
31 | } | |
32 | ||
33 | snprintf (dirbuf, dirbuflen, "%s%s", test_dir, dir_name); | |
34 | if (mkdtemp (dirbuf) == NULL) | |
35 | { | |
36 | puts ("cannot create temporary directory"); | |
37 | exit (1); | |
38 | } | |
39 | ||
40 | add_temp_file (dirbuf); | |
41 | ||
42 | dir_fd = open (dirbuf, O_RDONLY | O_DIRECTORY); | |
43 | if (dir_fd == -1) | |
44 | { | |
45 | puts ("cannot open directory"); | |
46 | exit (1); | |
47 | } | |
48 | } | |
49 | ||
50 | ||
51 | static int | |
52 | do_test (void) | |
53 | { | |
54 | /* fdopendir takes over the descriptor, make a copy. */ | |
55 | int dupfd = dup (dir_fd); | |
56 | if (dupfd == -1) | |
57 | { | |
58 | puts ("dup failed"); | |
59 | return 1; | |
60 | } | |
61 | if (lseek (dupfd, 0, SEEK_SET) != 0) | |
62 | { | |
63 | puts ("1st lseek failed"); | |
64 | return 1; | |
65 | } | |
66 | ||
67 | /* The directory should be empty safe the . and .. files. */ | |
68 | DIR *dir = fdopendir (dupfd); | |
69 | if (dir == NULL) | |
70 | { | |
71 | puts ("fdopendir failed"); | |
72 | return 1; | |
73 | } | |
74 | struct dirent64 *d; | |
75 | while ((d = readdir64 (dir)) != NULL) | |
76 | if (strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") != 0) | |
77 | { | |
78 | printf ("temp directory contains file \"%s\"\n", d->d_name); | |
79 | return 1; | |
80 | } | |
81 | closedir (dir); | |
82 | ||
83 | /* Try to create a file. */ | |
84 | int fd = openat (dir_fd, "some-file", O_CREAT|O_RDWR|O_EXCL, 0666); | |
85 | if (fd == -1) | |
86 | { | |
87 | if (errno == ENOSYS) | |
88 | { | |
89 | puts ("*at functions not supported"); | |
90 | return 0; | |
91 | } | |
92 | ||
93 | puts ("file creation failed"); | |
94 | return 1; | |
95 | } | |
96 | write (fd, "hello", 5); | |
97 | puts ("file created"); | |
98 | ||
99 | struct stat64 st1; | |
100 | if (fstat64 (fd, &st1) != 0) | |
101 | { | |
102 | puts ("fstat64 failed"); | |
103 | return 1; | |
104 | } | |
105 | ||
106 | close (fd); | |
107 | ||
108 | if (linkat (dir_fd, "some-file", dir_fd, "another-file") != 0) | |
109 | { | |
110 | puts ("symlinkat failed"); | |
111 | return 1; | |
112 | } | |
113 | ||
114 | struct stat64 st2; | |
115 | if (fstatat64 (dir_fd, "some-file", &st2, 0) != 0) | |
116 | { | |
117 | puts ("fstatat64 failed"); | |
118 | return 1; | |
119 | } | |
120 | if (st1.st_dev != st2.st_dev || st1.st_ino != st2.st_ino) | |
121 | { | |
122 | puts ("file changed after symlinkat"); | |
123 | return 1; | |
124 | } | |
125 | ||
126 | if (fstatat64 (dir_fd, "another-file", &st2, AT_SYMLINK_NOFOLLOW) != 0) | |
127 | { | |
128 | puts ("2nd fstatat64 failed"); | |
129 | return 1; | |
130 | } | |
131 | if (S_ISLNK (st2.st_mode)) | |
132 | { | |
133 | puts ("2nd fstatat64 shows file is a symlink"); | |
134 | return 1; | |
135 | } | |
136 | if (st1.st_dev != st2.st_dev | |
137 | || st1.st_ino != st2.st_ino | |
138 | || st1.st_size != st2.st_size) | |
139 | { | |
140 | puts ("stat results for linked file do not match"); | |
141 | return 1; | |
142 | } | |
143 | ||
144 | if (fstatat64 (dir_fd, "another-file", &st2, 0) != 0) | |
145 | { | |
146 | puts ("3rd fstatat64 failed"); | |
147 | return 1; | |
148 | } | |
149 | if (st1.st_dev != st2.st_dev | |
150 | || st1.st_ino != st2.st_ino | |
151 | || st1.st_size != st2.st_size) | |
152 | { | |
153 | puts ("stat results do not match"); | |
154 | return 1; | |
155 | } | |
156 | ||
157 | if (unlinkat (dir_fd, "another-file", 0) != 0) | |
158 | { | |
159 | puts ("unlinkat failed"); | |
160 | return 1; | |
161 | } | |
162 | if (unlinkat (dir_fd, "some-file", 0) != 0) | |
163 | { | |
164 | puts ("2nd unlinkat failed"); | |
165 | return 1; | |
166 | } | |
167 | ||
168 | close (dir_fd); | |
169 | ||
170 | return 0; | |
171 | } |