static boolean canOpen(FileSystem fs, Path p) throws IOException {
try {
fs.open(p);
return true;
} catch (AccessControlException e) {
return false;
}
}
public void testFilePermision() throws Exception {
final Configuration conf = new HdfsConfiguration();
conf.setBoolean(DFSConfigKeys.DFS_PERMISSIONS_ENABLED_KEY, true);
MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).numDataNodes(3).build();
cluster.waitActive();
try {
FileSystem nnfs = FileSystem.get(conf);
// test permissions on files that do not exist
assertFalse(nnfs.exists(CHILD_FILE1));
try {
nnfs.setOwner(CHILD_FILE1, "foo", "bar");
assertTrue(false);
} catch (java.io.FileNotFoundException e) {
LOG.info("GOOD: got " + e);
}
try {
nnfs.setPermission(CHILD_FILE1, new FsPermission((short) 0777));
assertTrue(false);
} catch (java.io.FileNotFoundException e) {
LOG.info("GOOD: got " + e);
}
// following dir/file creations are legal
nnfs.mkdirs(CHILD_DIR1);
FSDataOutputStream out = nnfs.create(CHILD_FILE1);
byte data[] = new byte[FILE_LEN];
RAN.nextBytes(data);
out.write(data);
out.close();
nnfs.setPermission(CHILD_FILE1, new FsPermission("700"));
// following read is legal
byte dataIn[] = new byte[FILE_LEN];
FSDataInputStream fin = nnfs.open(CHILD_FILE1);
int bytesRead = fin.read(dataIn);
assertTrue(bytesRead == FILE_LEN);
for (int i = 0; i < FILE_LEN; i++) {
assertEquals(data[i], dataIn[i]);
}
////////////////////////////////////////////////////////////////
// test illegal file/dir creation
UserGroupInformation userGroupInfo =
UserGroupInformation.createUserForTesting(USER_NAME, GROUP_NAMES);
FileSystem userfs = DFSTestUtil.getFileSystemAs(userGroupInfo, conf);
// make sure mkdir of a existing directory that is not owned by
// this user does not throw an exception.
userfs.mkdirs(CHILD_DIR1);
// illegal mkdir
assertTrue(!canMkdirs(userfs, CHILD_DIR2));
// illegal file creation
assertTrue(!canCreate(userfs, CHILD_FILE2));
// illegal file open
assertTrue(!canOpen(userfs, CHILD_FILE1));
nnfs.setPermission(ROOT_PATH, new FsPermission((short) 0755));
nnfs.setPermission(CHILD_DIR1, new FsPermission("777"));
nnfs.setPermission(new Path("/"), new FsPermission((short) 0777));
final Path RENAME_PATH = new Path("/foo/bar");
userfs.mkdirs(RENAME_PATH);
assertTrue(canRename(userfs, RENAME_PATH, CHILD_DIR1));
} finally {
cluster.shutdown();
}
}