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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 | #include <sys/stat.h> | |
8 | ||
9 | #include <support/xunistd.h> | |
10 | ||
11 | static void prepare (void); | |
12 | #define PREPARE(argc, argv) prepare () | |
13 | ||
14 | static int do_test (void); | |
15 | #define TEST_FUNCTION do_test () | |
16 | ||
17 | #include "../test-skeleton.c" | |
18 | ||
19 | static int dir_fd; | |
20 | ||
21 | static void | |
22 | prepare (void) | |
23 | { | |
24 | size_t test_dir_len = strlen (test_dir); | |
25 | static const char dir_name[] = "/tst-linkat.XXXXXX"; | |
26 | ||
27 | size_t dirbuflen = test_dir_len + sizeof (dir_name); | |
28 | char *dirbuf = malloc (dirbuflen); | |
29 | if (dirbuf == NULL) | |
30 | { | |
31 | puts ("out of memory"); | |
32 | exit (1); | |
33 | } | |
34 | ||
35 | snprintf (dirbuf, dirbuflen, "%s%s", test_dir, dir_name); | |
36 | if (mkdtemp (dirbuf) == NULL) | |
37 | { | |
38 | puts ("cannot create temporary directory"); | |
39 | exit (1); | |
40 | } | |
41 | ||
42 | add_temp_file (dirbuf); | |
43 | ||
44 | dir_fd = open (dirbuf, O_RDONLY | O_DIRECTORY); | |
45 | if (dir_fd == -1) | |
46 | { | |
47 | puts ("cannot open directory"); | |
48 | exit (1); | |
49 | } | |
50 | } | |
51 | ||
52 | ||
53 | static int | |
54 | do_test (void) | |
55 | { | |
56 | /* fdopendir takes over the descriptor, make a copy. */ | |
57 | int dupfd = dup (dir_fd); | |
58 | if (dupfd == -1) | |
59 | { | |
60 | puts ("dup failed"); | |
61 | return 1; | |
62 | } | |
63 | if (lseek (dupfd, 0, SEEK_SET) != 0) | |
64 | { | |
65 | puts ("1st lseek failed"); | |
66 | return 1; | |
67 | } | |
68 | ||
69 | /* The directory should be empty safe the . and .. files. */ | |
70 | DIR *dir = fdopendir (dupfd); | |
71 | if (dir == NULL) | |
72 | { | |
73 | puts ("fdopendir failed"); | |
74 | return 1; | |
75 | } | |
76 | struct dirent64 *d; | |
77 | while ((d = readdir64 (dir)) != NULL) | |
78 | if (strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") != 0) | |
79 | { | |
80 | printf ("temp directory contains file \"%s\"\n", d->d_name); | |
81 | return 1; | |
82 | } | |
83 | closedir (dir); | |
84 | ||
85 | /* Try to create a file. */ | |
86 | int fd = openat (dir_fd, "some-file", O_CREAT|O_RDWR|O_EXCL, 0666); | |
87 | if (fd == -1) | |
88 | { | |
89 | if (errno == ENOSYS) | |
90 | { | |
91 | puts ("*at functions not supported"); | |
92 | return 0; | |
93 | } | |
94 | ||
95 | puts ("file creation failed"); | |
96 | return 1; | |
97 | } | |
98 | xwrite (fd, "hello", 5); | |
99 | puts ("file created"); | |
100 | ||
101 | struct stat64 st1; | |
102 | if (fstat64 (fd, &st1) != 0) | |
103 | { | |
104 | puts ("fstat64 failed"); | |
105 | return 1; | |
106 | } | |
107 | ||
108 | close (fd); | |
109 | ||
110 | if (linkat (dir_fd, "some-file", dir_fd, "another-file", 0) != 0) | |
111 | { | |
112 | puts ("symlinkat failed"); | |
113 | return 1; | |
114 | } | |
115 | ||
116 | struct stat64 st2; | |
117 | if (fstatat64 (dir_fd, "some-file", &st2, 0) != 0) | |
118 | { | |
119 | puts ("fstatat64 failed"); | |
120 | return 1; | |
121 | } | |
122 | if (st1.st_dev != st2.st_dev || st1.st_ino != st2.st_ino) | |
123 | { | |
124 | puts ("file changed after symlinkat"); | |
125 | return 1; | |
126 | } | |
127 | ||
128 | if (fstatat64 (dir_fd, "another-file", &st2, AT_SYMLINK_NOFOLLOW) != 0) | |
129 | { | |
130 | puts ("2nd fstatat64 failed"); | |
131 | return 1; | |
132 | } | |
133 | if (S_ISLNK (st2.st_mode)) | |
134 | { | |
135 | puts ("2nd fstatat64 shows file is a symlink"); | |
136 | return 1; | |
137 | } | |
138 | if (st1.st_dev != st2.st_dev | |
139 | || st1.st_ino != st2.st_ino | |
140 | || st1.st_size != st2.st_size) | |
141 | { | |
142 | puts ("stat results for linked file do not match"); | |
143 | return 1; | |
144 | } | |
145 | ||
146 | if (fstatat64 (dir_fd, "another-file", &st2, 0) != 0) | |
147 | { | |
148 | puts ("3rd fstatat64 failed"); | |
149 | return 1; | |
150 | } | |
151 | if (st1.st_dev != st2.st_dev | |
152 | || st1.st_ino != st2.st_ino | |
153 | || st1.st_size != st2.st_size) | |
154 | { | |
155 | puts ("stat results do not match"); | |
156 | return 1; | |
157 | } | |
158 | ||
159 | if (unlinkat (dir_fd, "another-file", 0) != 0) | |
160 | { | |
161 | puts ("unlinkat failed"); | |
162 | return 1; | |
163 | } | |
164 | if (unlinkat (dir_fd, "some-file", 0) != 0) | |
165 | { | |
166 | puts ("2nd unlinkat failed"); | |
167 | return 1; | |
168 | } | |
169 | ||
170 | close (dir_fd); | |
171 | ||
172 | return 0; | |
173 | } |