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26cec518 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-unlinkat.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 | close (fd); | |
98 | puts ("file created"); | |
99 | ||
100 | /* fdopendir takes over the descriptor, make a copy. */ | |
101 | dupfd = dup (dir_fd); | |
102 | if (dupfd == -1) | |
103 | { | |
104 | puts ("2nd dup failed"); | |
105 | return 1; | |
106 | } | |
107 | if (lseek (dupfd, 0, SEEK_SET) != 0) | |
108 | { | |
109 | puts ("2nd lseek failed"); | |
110 | return 1; | |
111 | } | |
112 | ||
113 | /* The directory should be empty safe the . and .. files. */ | |
114 | dir = fdopendir (dupfd); | |
115 | if (dir == NULL) | |
116 | { | |
117 | puts ("2nd fdopendir failed"); | |
118 | return 1; | |
119 | } | |
120 | bool seen_file = false; | |
121 | while ((d = readdir64 (dir)) != NULL) | |
122 | if (strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") != 0) | |
123 | { | |
124 | if (strcmp (d->d_name, "some-file") != 0) | |
125 | { | |
126 | printf ("temp directory contains file \"%s\"\n", d->d_name); | |
127 | return 1; | |
128 | } | |
129 | ||
130 | seen_file = true; | |
131 | } | |
132 | closedir (dir); | |
133 | ||
134 | if (!seen_file) | |
135 | { | |
136 | puts ("file not created in correct directory"); | |
137 | return 1; | |
138 | } | |
139 | ||
140 | /* Remove the file now. */ | |
141 | if (unlinkat (dir_fd, "some-file", 0) != 0) | |
142 | { | |
143 | puts ("unlinkat failed"); | |
144 | return 1; | |
145 | } | |
146 | ||
147 | /* We won't need dir_fd anymore after this, so use it. */ | |
148 | if (lseek (dir_fd, 0, SEEK_SET) != 0) | |
149 | { | |
150 | puts ("3rd lseek failed"); | |
151 | return 1; | |
152 | } | |
153 | ||
154 | /* The directory should be empty safe the . and .. files. */ | |
155 | dir = fdopendir (dir_fd); | |
156 | if (dir == NULL) | |
157 | { | |
158 | puts ("3rd fdopendir failed"); | |
159 | return 1; | |
160 | } | |
161 | while ((d = readdir64 (dir)) != NULL) | |
162 | if (strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") != 0) | |
163 | { | |
164 | if (strcmp (d->d_name, "some-file") == 0) | |
165 | { | |
166 | puts ("some-file not removed"); | |
167 | return 1; | |
168 | } | |
169 | else | |
170 | { | |
171 | printf ("temp directory contains file \"%s\"\n", d->d_name); | |
172 | return 1; | |
173 | } | |
174 | } | |
175 | closedir (dir); | |
176 | ||
177 | return 0; | |
178 | } |