HADOOP-9214. Create a new touch command to allow modifying atime and mtime. Contributed by Hrishikesh Gadre.
This commit is contained in:
Xiao Chen
parent
a17eed1b87
commit
60ffec9f79
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@ -66,7 +66,7 @@ abstract public class FsCommand extends Command {
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factory.registerCommands(Tail.class);
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factory.registerCommands(Tail.class);
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factory.registerCommands(Head.class);
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factory.registerCommands(Head.class);
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factory.registerCommands(Test.class);
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factory.registerCommands(Test.class);
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factory.registerCommands(Touch.class);
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factory.registerCommands(TouchCommands.class);
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factory.registerCommands(Truncate.class);
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factory.registerCommands(Truncate.class);
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factory.registerCommands(SnapshotCommands.class);
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factory.registerCommands(SnapshotCommands.class);
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factory.registerCommands(XAttrCommands.class);
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factory.registerCommands(XAttrCommands.class);
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@ -1,85 +0,0 @@
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/**
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.hadoop.fs.shell;
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import java.io.IOException;
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import java.util.LinkedList;
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import org.apache.hadoop.classification.InterfaceAudience;
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import org.apache.hadoop.classification.InterfaceStability;
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import org.apache.hadoop.fs.PathIOException;
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import org.apache.hadoop.fs.PathIsDirectoryException;
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import org.apache.hadoop.fs.PathNotFoundException;
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/**
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* Unix touch like commands
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*/
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@InterfaceAudience.Private
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@InterfaceStability.Unstable
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class Touch extends FsCommand {
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public static void registerCommands(CommandFactory factory) {
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factory.addClass(Touchz.class, "-touchz");
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}
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/**
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* (Re)create zero-length file at the specified path.
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* This will be replaced by a more UNIX-like touch when files may be
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* modified.
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*/
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public static class Touchz extends Touch {
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public static final String NAME = "touchz";
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public static final String USAGE = "<path> ...";
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public static final String DESCRIPTION =
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"Creates a file of zero length " +
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"at <path> with current time as the timestamp of that <path>. " +
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"An error is returned if the file exists with non-zero length\n";
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@Override
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protected void processOptions(LinkedList<String> args) {
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CommandFormat cf = new CommandFormat(1, Integer.MAX_VALUE);
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cf.parse(args);
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}
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@Override
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protected void processPath(PathData item) throws IOException {
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if (item.stat.isDirectory()) {
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// TODO: handle this
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throw new PathIsDirectoryException(item.toString());
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}
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if (item.stat.getLen() != 0) {
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throw new PathIOException(item.toString(), "Not a zero-length file");
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}
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touchz(item);
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}
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@Override
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protected void processNonexistentPath(PathData item) throws IOException {
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if (!item.parentExists()) {
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throw new PathNotFoundException(item.toString())
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.withFullyQualifiedPath(item.path.toUri().toString());
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}
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touchz(item);
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}
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private void touchz(PathData item) throws IOException {
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item.fs.create(item.path).close();
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}
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}
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}
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@ -0,0 +1,198 @@
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/**
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.hadoop.fs.shell;
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import java.io.IOException;
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import java.text.DateFormat;
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import java.text.ParseException;
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import java.text.SimpleDateFormat;
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import java.util.LinkedList;
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import org.apache.hadoop.classification.InterfaceAudience;
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import org.apache.hadoop.classification.InterfaceStability;
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import org.apache.hadoop.fs.PathIOException;
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import org.apache.hadoop.fs.PathIsDirectoryException;
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import org.apache.hadoop.fs.PathNotFoundException;
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import org.apache.hadoop.util.StringUtils;
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import com.google.common.annotations.VisibleForTesting;
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/**
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* Unix touch like commands
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*/
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@InterfaceAudience.Private
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@InterfaceStability.Unstable
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public class TouchCommands extends FsCommand {
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public static void registerCommands(CommandFactory factory) {
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factory.addClass(Touchz.class, "-touchz");
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factory.addClass(Touch.class, "-touch");
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}
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/**
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* (Re)create zero-length file at the specified path.
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* This will be replaced by a more UNIX-like touch when files may be
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* modified.
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*/
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public static class Touchz extends TouchCommands {
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public static final String NAME = "touchz";
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public static final String USAGE = "<path> ...";
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public static final String DESCRIPTION =
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"Creates a file of zero length " +
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"at <path> with current time as the timestamp of that <path>. " +
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"An error is returned if the file exists with non-zero length\n";
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@Override
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protected void processOptions(LinkedList<String> args) {
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CommandFormat cf = new CommandFormat(1, Integer.MAX_VALUE);
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cf.parse(args);
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}
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@Override
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protected void processPath(PathData item) throws IOException {
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if (item.stat.isDirectory()) {
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// TODO: handle this
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throw new PathIsDirectoryException(item.toString());
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}
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if (item.stat.getLen() != 0) {
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throw new PathIOException(item.toString(), "Not a zero-length file");
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}
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touchz(item);
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}
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@Override
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protected void processNonexistentPath(PathData item) throws IOException {
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if (!item.parentExists()) {
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throw new PathNotFoundException(item.toString())
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.withFullyQualifiedPath(item.path.toUri().toString());
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}
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touchz(item);
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}
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private void touchz(PathData item) throws IOException {
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item.fs.create(item.path).close();
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}
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}
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/**
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* A UNIX like touch command.
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*/
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public static class Touch extends TouchCommands {
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private static final String OPTION_CHANGE_ONLY_MODIFICATION_TIME = "m";
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private static final String OPTION_CHANGE_ONLY_ACCESS_TIME = "a";
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private static final String OPTION_USE_TIMESTAMP = "t";
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private static final String OPTION_DO_NOT_CREATE_FILE = "c";
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public static final String NAME = "touch";
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public static final String USAGE = "[-" + OPTION_CHANGE_ONLY_ACCESS_TIME
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+ "] [-" + OPTION_CHANGE_ONLY_MODIFICATION_TIME + "] [-"
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+ OPTION_USE_TIMESTAMP + " TIMESTAMP ] [-" + OPTION_DO_NOT_CREATE_FILE
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+ "] <path> ...";
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public static final String DESCRIPTION =
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"Updates the access and modification times of the file specified by the"
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+ " <path> to the current time. If the file does not exist, then a zero"
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+ " length file is created at <path> with current time as the timestamp"
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+ " of that <path>.\n"
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+ "-" + OPTION_CHANGE_ONLY_ACCESS_TIME
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+ " Change only the access time \n" + "-"
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+ OPTION_CHANGE_ONLY_MODIFICATION_TIME
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+ " Change only the modification time \n" + "-"
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+ OPTION_USE_TIMESTAMP + " TIMESTAMP"
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+ " Use specified timestamp (in format yyyyMMddHHmmss) instead of current time \n"
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+ "-" + OPTION_DO_NOT_CREATE_FILE + " Do not create any files";
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private boolean changeModTime = false;
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private boolean changeAccessTime = false;
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private boolean doNotCreate = false;
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private String timestamp;
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private final SimpleDateFormat dateFormat =
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new SimpleDateFormat("yyyyMMdd:HHmmss");
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@InterfaceAudience.Private
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@VisibleForTesting
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public DateFormat getDateFormat() {
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return dateFormat;
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}
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@Override
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protected void processOptions(LinkedList<String> args) {
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this.timestamp =
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StringUtils.popOptionWithArgument("-" + OPTION_USE_TIMESTAMP, args);
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CommandFormat cf = new CommandFormat(1, Integer.MAX_VALUE,
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OPTION_USE_TIMESTAMP, OPTION_CHANGE_ONLY_ACCESS_TIME,
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OPTION_CHANGE_ONLY_MODIFICATION_TIME);
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cf.parse(args);
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this.changeModTime = cf.getOpt(OPTION_CHANGE_ONLY_MODIFICATION_TIME);
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this.changeAccessTime = cf.getOpt(OPTION_CHANGE_ONLY_ACCESS_TIME);
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this.doNotCreate = cf.getOpt(OPTION_DO_NOT_CREATE_FILE);
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}
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@Override
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protected void processPath(PathData item) throws IOException {
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if (item.stat.isDirectory()) {
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throw new PathIsDirectoryException(item.toString());
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}
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touch(item);
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}
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@Override
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protected void processNonexistentPath(PathData item) throws IOException {
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if (!item.parentExists()) {
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throw new PathNotFoundException(item.toString())
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.withFullyQualifiedPath(item.path.toUri().toString());
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}
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touch(item);
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}
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private void touch(PathData item) throws IOException {
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if (!item.fs.exists(item.path)) {
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if (doNotCreate) {
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return;
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}
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item.fs.create(item.path).close();
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if (timestamp != null) {
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// update the time only if user specified a timestamp using -t option.
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updateTime(item);
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}
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} else {
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updateTime(item);
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}
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}
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private void updateTime(PathData item) throws IOException {
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long time = System.currentTimeMillis();
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if (timestamp != null) {
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try {
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time = dateFormat.parse(timestamp).getTime();
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} catch (ParseException e) {
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throw new IllegalArgumentException(
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"Unable to parse the specified timestamp " + timestamp, e);
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}
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}
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if (changeModTime ^ changeAccessTime) {
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long atime = changeModTime ? -1 : time;
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long mtime = changeAccessTime ? -1 : time;
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item.fs.setTimes(item.path, mtime, atime);
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} else {
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item.fs.setTimes(item.path, time, time);
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}
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}
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}
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}
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@ -741,6 +741,38 @@ Usage: `hadoop fs -text <src> `
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Takes a source file and outputs the file in text format. The allowed formats are zip and TextRecordInputStream.
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Takes a source file and outputs the file in text format. The allowed formats are zip and TextRecordInputStream.
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touch
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------
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Usage: `hadoop fs -touch [-a] [-m] [-t TIMESTAMP] [-c] URI [URI ...]`
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Updates the access and modification times of the file specified by the URI to the current time.
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If the file does not exist, then a zero length file is created at URI with current time as the
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timestamp of that URI.
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* Use -a option to change only the access time
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* Use -m option to change only the modification time
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* Use -t option to specify timestamp (in format yyyyMMddHHmmss) instead of current time
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* Use -c option to not create file if it does not exist
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The timestamp format is as follows
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* yyyy Four digit year (e.g. 2018)
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* MM Two digit month of the year (e.g. 08 for month of August)
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* dd Two digit day of the month (e.g. 01 for first day of the month)
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* HH Two digit hour of the day using 24 hour notation (e.g. 23 stands for 11 pm, 11 stands for 11 am)
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* mm Two digit minutes of the hour
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* ss Two digit seconds of the minute
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e.g. 20180809230000 represents August 9th 2018, 11pm
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Example:
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* `hadoop fs -touch pathname`
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* `hadoop fs -touch -m -t 20180809230000 pathname`
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* `hadoop fs -touch -t 20180809230000 pathname`
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* `hadoop fs -touch -a pathname`
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Exit Code: Returns 0 on success and -1 on error.
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touchz
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touchz
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------
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------
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@ -21,7 +21,11 @@ import static org.hamcrest.CoreMatchers.is;
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import static org.hamcrest.CoreMatchers.not;
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import static org.hamcrest.CoreMatchers.not;
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import static org.junit.Assert.assertThat;
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import static org.junit.Assert.assertThat;
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import java.text.ParseException;
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import java.util.Date;
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import org.apache.hadoop.conf.Configuration;
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import org.apache.hadoop.conf.Configuration;
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import org.apache.hadoop.fs.shell.TouchCommands.Touch;
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import org.apache.hadoop.test.GenericTestUtils;
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import org.apache.hadoop.test.GenericTestUtils;
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import org.apache.hadoop.util.StringUtils;
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import org.apache.hadoop.util.StringUtils;
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import org.junit.Before;
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import org.junit.Before;
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@ -85,4 +89,103 @@ public class TestFsShellTouch {
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assertThat("Expected failed touchz in a non-existent directory",
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assertThat("Expected failed touchz in a non-existent directory",
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shellRun("-touchz", noDirName + "/foo"), is(not(0)));
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shellRun("-touchz", noDirName + "/foo"), is(not(0)));
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}
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}
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@Test
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public void testTouch() throws Exception {
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// Ensure newFile2 does not exist
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final String newFileName = "newFile2";
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final Path newFile = new Path(newFileName);
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lfs.delete(newFile, true);
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assertThat(lfs.exists(newFile), is(false));
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{
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assertThat(
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"Expected successful touch on a non-existent file with -c option",
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shellRun("-touch", "-c", newFileName), is(not(0)));
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assertThat(lfs.exists(newFile), is(false));
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}
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{
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String strTime = formatTimestamp(System.currentTimeMillis());
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Date dateObj = parseTimestamp(strTime);
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assertThat(
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"Expected successful touch on a new file with a specified timestamp",
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shellRun("-touch", "-t", strTime, newFileName), is(0));
|
||||||
|
FileStatus new_status = lfs.getFileStatus(newFile);
|
||||||
|
assertThat(new_status.getAccessTime(), is(dateObj.getTime()));
|
||||||
|
assertThat(new_status.getModificationTime(), is(dateObj.getTime()));
|
||||||
|
}
|
||||||
|
|
||||||
|
FileStatus fstatus = lfs.getFileStatus(newFile);
|
||||||
|
|
||||||
|
{
|
||||||
|
String strTime = formatTimestamp(System.currentTimeMillis());
|
||||||
|
Date dateObj = parseTimestamp(strTime);
|
||||||
|
|
||||||
|
assertThat("Expected successful touch with a specified access time",
|
||||||
|
shellRun("-touch", "-a", "-t", strTime, newFileName), is(0));
|
||||||
|
FileStatus new_status = lfs.getFileStatus(newFile);
|
||||||
|
// Verify if access time is recorded correctly (and modification time
|
||||||
|
// remains unchanged).
|
||||||
|
assertThat(new_status.getAccessTime(), is(dateObj.getTime()));
|
||||||
|
assertThat(new_status.getModificationTime(),
|
||||||
|
is(fstatus.getModificationTime()));
|
||||||
|
}
|
||||||
|
|
||||||
|
fstatus = lfs.getFileStatus(newFile);
|
||||||
|
|
||||||
|
{
|
||||||
|
String strTime = formatTimestamp(System.currentTimeMillis());
|
||||||
|
Date dateObj = parseTimestamp(strTime);
|
||||||
|
|
||||||
|
assertThat(
|
||||||
|
"Expected successful touch with a specified modificatiom time",
|
||||||
|
shellRun("-touch", "-m", "-t", strTime, newFileName), is(0));
|
||||||
|
// Verify if modification time is recorded correctly (and access time
|
||||||
|
// remains unchanged).
|
||||||
|
FileStatus new_status = lfs.getFileStatus(newFile);
|
||||||
|
assertThat(new_status.getAccessTime(), is(fstatus.getAccessTime()));
|
||||||
|
assertThat(new_status.getModificationTime(), is(dateObj.getTime()));
|
||||||
|
}
|
||||||
|
|
||||||
|
{
|
||||||
|
String strTime = formatTimestamp(System.currentTimeMillis());
|
||||||
|
Date dateObj = parseTimestamp(strTime);
|
||||||
|
|
||||||
|
assertThat("Expected successful touch with a specified timestamp",
|
||||||
|
shellRun("-touch", "-t", strTime, newFileName), is(0));
|
||||||
|
|
||||||
|
// Verify if both modification and access times are recorded correctly
|
||||||
|
FileStatus new_status = lfs.getFileStatus(newFile);
|
||||||
|
assertThat(new_status.getAccessTime(), is(dateObj.getTime()));
|
||||||
|
assertThat(new_status.getModificationTime(), is(dateObj.getTime()));
|
||||||
|
}
|
||||||
|
|
||||||
|
{
|
||||||
|
String strTime = formatTimestamp(System.currentTimeMillis());
|
||||||
|
Date dateObj = parseTimestamp(strTime);
|
||||||
|
|
||||||
|
assertThat("Expected successful touch with a specified timestamp",
|
||||||
|
shellRun("-touch", "-a", "-m", "-t", strTime, newFileName), is(0));
|
||||||
|
|
||||||
|
// Verify if both modification and access times are recorded correctly
|
||||||
|
FileStatus new_status = lfs.getFileStatus(newFile);
|
||||||
|
assertThat(new_status.getAccessTime(), is(dateObj.getTime()));
|
||||||
|
assertThat(new_status.getModificationTime(), is(dateObj.getTime()));
|
||||||
|
}
|
||||||
|
|
||||||
|
{
|
||||||
|
assertThat("Expected failed touch with a missing timestamp",
|
||||||
|
shellRun("-touch", "-t", newFileName), is(not(0)));
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
private String formatTimestamp(long timeInMillis) {
|
||||||
|
return (new Touch()).getDateFormat().format(new Date(timeInMillis));
|
||||||
|
}
|
||||||
|
|
||||||
|
private Date parseTimestamp(String tstamp) throws ParseException {
|
||||||
|
return (new Touch()).getDateFormat().parse(tstamp);
|
||||||
|
}
|
||||||
}
|
}
|
||||||
|
|
|
||||||
|
|
@ -839,6 +839,57 @@
|
||||||
</comparators>
|
</comparators>
|
||||||
</test>
|
</test>
|
||||||
|
|
||||||
|
<test> <!-- TESTED -->
|
||||||
|
<description>help: help for touch</description>
|
||||||
|
<test-commands>
|
||||||
|
<command>-help touch</command>
|
||||||
|
</test-commands>
|
||||||
|
<cleanup-commands>
|
||||||
|
</cleanup-commands>
|
||||||
|
<comparators>
|
||||||
|
<comparator>
|
||||||
|
<type>RegexpComparator</type>
|
||||||
|
<expected-output>^-touch \[-a\] \[-m\] \[-t TIMESTAMP \] \[-c\] <path> \.\.\. :( )*</expected-output>
|
||||||
|
</comparator>
|
||||||
|
<comparator>
|
||||||
|
<type>RegexpComparator</type>
|
||||||
|
<expected-output>^\s*Updates the access and modification times of the file specified by the <path> to( )*</expected-output>
|
||||||
|
</comparator>
|
||||||
|
<comparator>
|
||||||
|
<type>RegexpComparator</type>
|
||||||
|
<expected-output>^\s*the current time. If the file does not exist, then a zero length file is created( )*</expected-output>
|
||||||
|
</comparator>
|
||||||
|
<comparator>
|
||||||
|
<type>RegexpComparator</type>
|
||||||
|
<expected-output>^\s*at <path> with current time as the timestamp of that <path>.( )*</expected-output>
|
||||||
|
</comparator>
|
||||||
|
<comparator>
|
||||||
|
<type>RegexpComparator</type>
|
||||||
|
<expected-output>^\s*-a\s+Change only the access time( )*</expected-output>
|
||||||
|
</comparator>
|
||||||
|
<comparator>
|
||||||
|
<type>RegexpComparator</type>
|
||||||
|
<expected-output>^\s*-a\s+Change only the access time( )*</expected-output>
|
||||||
|
</comparator>
|
||||||
|
<comparator>
|
||||||
|
<type>RegexpComparator</type>
|
||||||
|
<expected-output>^\s*-m\s+Change only the modification time( )*</expected-output>
|
||||||
|
</comparator>
|
||||||
|
<comparator>
|
||||||
|
<type>RegexpComparator</type>
|
||||||
|
<expected-output>^\s*-t\s+TIMESTAMP\s+Use specified timestamp \(in format yyyyMMddHHmmss\) instead of</expected-output>
|
||||||
|
</comparator>
|
||||||
|
<comparator>
|
||||||
|
<type>RegexpComparator</type>
|
||||||
|
<expected-output>^\s*current time( )*</expected-output>
|
||||||
|
</comparator>
|
||||||
|
<comparator>
|
||||||
|
<type>RegexpComparator</type>
|
||||||
|
<expected-output>^\s*-c\s+Do not create any files( )*</expected-output>
|
||||||
|
</comparator>
|
||||||
|
</comparators>
|
||||||
|
</test>
|
||||||
|
|
||||||
<test> <!-- TESTED -->
|
<test> <!-- TESTED -->
|
||||||
<description>help: help for touchz</description>
|
<description>help: help for touchz</description>
|
||||||
<test-commands>
|
<test-commands>
|
||||||
|
|
|
||||||
Loading…
Reference in New Issue