| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.hadoop.fs.shell; |
| |
| import java.io.IOException; |
| import java.text.SimpleDateFormat; |
| import java.util.Date; |
| import java.util.LinkedList; |
| import java.util.TimeZone; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.fs.FileStatus; |
| |
| /** |
| * Print statistics about path in specified format. |
| * Format sequences: |
| * %b: Size of file in blocks |
| * %n: Filename |
| * %o: Block size |
| * %r: replication |
| * %y: UTC date as "yyyy-MM-dd HH:mm:ss" |
| * %Y: Milliseconds since January 1, 1970 UTC |
| */ |
| @InterfaceAudience.Private |
| @InterfaceStability.Unstable |
| |
| class Stat extends FsCommand { |
| public static void registerCommands(CommandFactory factory) { |
| factory.addClass(Stat.class, "-stat"); |
| } |
| |
| public static final String NAME = "stat"; |
| public static final String USAGE = "[format] <path> ..."; |
| public static final String DESCRIPTION = |
| "Print statistics about the file/directory at <path>\n" + |
| "in the specified format. Format accepts filesize in blocks (%b), filename (%n),\n" + |
| "block size (%o), replication (%r), modification date (%y, %Y)\n"; |
| |
| protected static final SimpleDateFormat timeFmt; |
| static { |
| timeFmt = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); |
| timeFmt.setTimeZone(TimeZone.getTimeZone("UTC")); |
| } |
| |
| // default format string |
| protected String format = "%y"; |
| |
| @Override |
| protected void processOptions(LinkedList<String> args) throws IOException { |
| CommandFormat cf = new CommandFormat(null, 1, Integer.MAX_VALUE, "R"); |
| cf.parse(args); |
| setRecursive(cf.getOpt("R")); |
| if (args.getFirst().contains("%")) format = args.removeFirst(); |
| cf.parse(args); // make sure there's still at least one arg |
| } |
| |
| @Override |
| protected void processPath(PathData item) throws IOException { |
| FileStatus stat = item.stat; |
| StringBuilder buf = new StringBuilder(); |
| |
| char[] fmt = format.toCharArray(); |
| for (int i = 0; i < fmt.length; ++i) { |
| if (fmt[i] != '%') { |
| buf.append(fmt[i]); |
| } else { |
| // this silently drops a trailing %? |
| if (i + 1 == fmt.length) break; |
| switch (fmt[++i]) { |
| case 'b': |
| buf.append(stat.getLen()); |
| break; |
| case 'F': |
| buf.append(stat.isDirectory() |
| ? "directory" |
| : (stat.isFile() ? "regular file" : "symlink")); |
| break; |
| case 'n': |
| buf.append(item.path.getName()); |
| break; |
| case 'o': |
| buf.append(stat.getBlockSize()); |
| break; |
| case 'r': |
| buf.append(stat.getReplication()); |
| break; |
| case 'y': |
| buf.append(timeFmt.format(new Date(stat.getModificationTime()))); |
| break; |
| case 'Y': |
| buf.append(stat.getModificationTime()); |
| break; |
| default: |
| // this leaves %<unknown> alone, which causes the potential for |
| // future format options to break strings; should use %% to |
| // escape percents |
| buf.append(fmt[i]); |
| break; |
| } |
| } |
| } |
| out.println(buf.toString()); |
| } |
| } |