private static void execSetPermission(File f, FsPermission permission) throws IOException {
if (NativeIO.isAvailable()) {
NativeIO.chmod(f.getCanonicalPath(), permission.toShort());
} else {
execCommand(f, Shell.SET_PERMISSION_COMMAND, String.format("%04o", permission.toShort()));
}
}
/// loads permissions, owner, and group from `ls -ld`
private void loadPermissionInfo() {
IOException e = null;
try {
String output =
FileUtil.execCommand(new File(getPath().toUri()), Shell.getGetPermissionCommand());
StringTokenizer t = new StringTokenizer(output, Shell.TOKEN_SEPARATOR_REGEX);
// expected format
// -rw------- 1 username groupname ...
String permission = t.nextToken();
if (permission.length() > FsPermission.MAX_PERMISSION_LENGTH) {
// files with ACLs might have a '+'
permission = permission.substring(0, FsPermission.MAX_PERMISSION_LENGTH);
}
setPermission(FsPermission.valueOf(permission));
t.nextToken();
String owner = t.nextToken();
// If on windows domain, token format is DOMAIN\\user and we want to
// extract only the user name
if (Shell.WINDOWS) {
int i = owner.indexOf('\\');
if (i != -1) owner = owner.substring(i + 1);
}
setOwner(owner);
setGroup(t.nextToken());
} catch (Shell.ExitCodeException ioe) {
if (ioe.getExitCode() != 1) {
e = ioe;
} else {
setPermission(null);
setOwner(null);
setGroup(null);
}
} catch (IOException ioe) {
e = ioe;
} finally {
if (e != null) {
throw new RuntimeException(
"Error while running command to get "
+ "file permissions : "
+ StringUtils.stringifyException(e));
}
}
}