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Commit | Line | Data |
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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> | |
ceaa9889 | 7 | #include <sys/stat.h> |
26cec518 UD |
8 | |
9 | ||
10 | static void prepare (void); | |
11 | #define PREPARE(argc, argv) prepare () | |
12 | ||
13 | static int do_test (void); | |
14 | #define TEST_FUNCTION do_test () | |
15 | ||
16 | #include "../test-skeleton.c" | |
17 | ||
18 | static int dir_fd; | |
19 | ||
20 | static void | |
21 | prepare (void) | |
22 | { | |
d23965cf | 23 | #if _POSIX_CHOWN_RESTRICTED == 0 |
c71665ad UD |
24 | if (pathconf (test_dir, _PC_CHOWN_RESTRICTED) != 0) |
25 | #endif | |
26cec518 | 26 | { |
c71665ad UD |
27 | uid_t uid = getuid (); |
28 | if (uid != 0) | |
29 | { | |
30 | puts ("need root privileges"); | |
31 | exit (0); | |
32 | } | |
26cec518 | 33 | } |
26cec518 UD |
34 | |
35 | size_t test_dir_len = strlen (test_dir); | |
36 | static const char dir_name[] = "/tst-fchownat.XXXXXX"; | |
37 | ||
38 | size_t dirbuflen = test_dir_len + sizeof (dir_name); | |
39 | char *dirbuf = malloc (dirbuflen); | |
40 | if (dirbuf == NULL) | |
41 | { | |
42 | puts ("out of memory"); | |
43 | exit (1); | |
44 | } | |
45 | ||
46 | snprintf (dirbuf, dirbuflen, "%s%s", test_dir, dir_name); | |
47 | if (mkdtemp (dirbuf) == NULL) | |
48 | { | |
49 | puts ("cannot create temporary directory"); | |
50 | exit (1); | |
51 | } | |
52 | ||
53 | add_temp_file (dirbuf); | |
54 | ||
55 | dir_fd = open (dirbuf, O_RDONLY | O_DIRECTORY); | |
56 | if (dir_fd == -1) | |
57 | { | |
58 | puts ("cannot open directory"); | |
59 | exit (1); | |
60 | } | |
61 | } | |
62 | ||
63 | ||
64 | static int | |
65 | do_test (void) | |
66 | { | |
67 | /* fdopendir takes over the descriptor, make a copy. */ | |
68 | int dupfd = dup (dir_fd); | |
69 | if (dupfd == -1) | |
70 | { | |
71 | puts ("dup failed"); | |
72 | return 1; | |
73 | } | |
74 | if (lseek (dupfd, 0, SEEK_SET) != 0) | |
75 | { | |
76 | puts ("1st lseek failed"); | |
77 | return 1; | |
78 | } | |
79 | ||
80 | /* The directory should be empty safe the . and .. files. */ | |
81 | DIR *dir = fdopendir (dupfd); | |
82 | if (dir == NULL) | |
83 | { | |
84 | puts ("fdopendir failed"); | |
85 | return 1; | |
86 | } | |
87 | struct dirent64 *d; | |
88 | while ((d = readdir64 (dir)) != NULL) | |
89 | if (strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") != 0) | |
90 | { | |
91 | printf ("temp directory contains file \"%s\"\n", d->d_name); | |
92 | return 1; | |
93 | } | |
94 | closedir (dir); | |
95 | ||
96 | /* Try to create a file. */ | |
97 | int fd = openat (dir_fd, "some-file", O_CREAT|O_RDWR|O_EXCL, 0666); | |
98 | if (fd == -1) | |
99 | { | |
100 | if (errno == ENOSYS) | |
101 | { | |
102 | puts ("*at functions not supported"); | |
103 | return 0; | |
104 | } | |
105 | ||
106 | puts ("file creation failed"); | |
107 | return 1; | |
108 | } | |
109 | write (fd, "hello", 5); | |
110 | puts ("file created"); | |
111 | ||
112 | struct stat64 st1; | |
113 | if (fstat64 (fd, &st1) != 0) | |
114 | { | |
115 | puts ("fstat64 failed"); | |
116 | return 1; | |
117 | } | |
118 | ||
bdc7e223 UD |
119 | /* Before closing the file, try using this file descriptor to open |
120 | another file. This must fail. */ | |
121 | if (fchownat (fd, "some-file", 1, 1, 0) != -1) | |
122 | { | |
123 | puts ("fchownat using descriptor for normal file worked"); | |
124 | return 1; | |
125 | } | |
126 | if (errno != ENOTDIR) | |
127 | { | |
128 | puts ("\ | |
129 | error for fchownat using descriptor for normal file not ENOTDIR "); | |
130 | return 1; | |
131 | } | |
132 | ||
26cec518 UD |
133 | close (fd); |
134 | ||
135 | if (fchownat (dir_fd, "some-file", st1.st_uid + 1, st1.st_gid + 1, 0) != 0) | |
136 | { | |
137 | puts ("fchownat failed"); | |
138 | return 1; | |
139 | } | |
140 | ||
141 | struct stat64 st2; | |
142 | if (fstatat64 (dir_fd, "some-file", &st2, 0) != 0) | |
143 | { | |
144 | puts ("fstatat64 failed"); | |
145 | return 1; | |
146 | } | |
147 | ||
148 | if (st1.st_uid + 1 != st2.st_uid || st1.st_gid + 1 != st2.st_gid) | |
149 | { | |
150 | puts ("owner change failed"); | |
151 | return 1; | |
152 | } | |
153 | ||
154 | if (unlinkat (dir_fd, "some-file", 0) != 0) | |
155 | { | |
156 | puts ("unlinkat failed"); | |
157 | return 1; | |
158 | } | |
159 | ||
bdc7e223 UD |
160 | /* Create a file descriptor which is closed again right away. */ |
161 | int dir_fd2 = dup (dir_fd); | |
162 | if (dir_fd2 == -1) | |
163 | { | |
164 | puts ("dup failed"); | |
165 | return 1; | |
166 | } | |
167 | close (dir_fd2); | |
168 | ||
169 | if (fchownat (dir_fd2, "some-file", 1, 1, 0) != -1) | |
170 | { | |
171 | puts ("fchownat using closed descriptor worked"); | |
172 | return 1; | |
173 | } | |
174 | if (errno != EBADF) | |
175 | { | |
176 | puts ("error for fchownat using closed descriptor not EBADF "); | |
177 | return 1; | |
178 | } | |
179 | ||
26cec518 UD |
180 | close (dir_fd); |
181 | ||
bdc7e223 UD |
182 | if (fchownat (-1, "some-file", 1, 1, 0) != -1) |
183 | { | |
184 | puts ("fchownat using invalid descriptor worked"); | |
185 | return 1; | |
186 | } | |
187 | if (errno != EBADF) | |
188 | { | |
189 | puts ("error for fchownat using invalid descriptor not EBADF "); | |
190 | return 1; | |
191 | } | |
192 | ||
26cec518 UD |
193 | return 0; |
194 | } |