001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *   https://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019
020package org.apache.commons.exec.launcher;
021
022import java.io.File;
023import java.io.IOException;
024import java.util.Map;
025
026import org.apache.commons.exec.CommandLine;
027
028/**
029 * A command launcher for Windows XP/2000/NT that uses 'cmd.exe' when launching commands in directories other than the current working directory.
030 */
031public class WinNTCommandLauncher extends CommandLauncherProxy {
032
033    /**
034     * Constructs a new instance.
035     *
036     * @param launcher the command launcher to use.
037     */
038    public WinNTCommandLauncher(final CommandLauncher launcher) {
039        super(launcher);
040    }
041
042    /**
043     * Launches the given command in a new process, in the given working directory.
044     *
045     * @param cmd        the command line to execute as an array of strings.
046     * @param env        the environment to set as an array of strings.
047     * @param workingDir working directory where the command should run.
048     * @throws IOException forwarded from the exec method of the command launcher.
049     */
050    @Override
051    public Process exec(final CommandLine cmd, final Map<String, String> env, final File workingDir) throws IOException {
052        if (workingDir == null) {
053            return exec(cmd, env);
054        }
055
056        // Use cmd.exe to change to the specified directory before running the command.
057        // @formatter:off
058        return exec(new CommandLine("cmd")
059                .addArgument("/c")
060                .addArguments(cmd.toStrings()), env);
061        // @formatter:on
062    }
063}