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The BSD License Copyright (c) 2010-2012 RIPE NCC All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: - Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. - Neither the name of the RIPE NCC nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 package net.ripe.rpki.commons.rsync;
 
 import java.io.File;
 import java.util.List;
 import java.util.Map;
 
 
 public class Command extends Thread {
 
     public static final int NOT_EXECUTED = -1;
     public static final int COMMAND_FAILED = -2;
 
     private List<Stringargs;
     private Map<StringStringenvp;
     private String execDir;
 
     private int exitStatus = ;
 
     private boolean started;
 
     private Exception exception;
 
     private List<StringoutputLines;
     private List<StringerrorLines;
 
 
     public Command(String command) {
         this(commandnullnull);
     }
 
     public Command(String commandMap<StringStringenvp) {
         this(commandenvpnull);
     }
 
     public Command(String commandMap<StringStringenvpString execdir) {
         this(Arrays.asList(command), envpexecdir);
     }
 
     public Command(List<Stringargs) {
         this(argsnullnull);
     }
 
     public Command(List<StringargsMap<StringStringenvp) {
         this(argsenvpnull);
     }
 
     public Command(List<StringargsMap<StringStringenvpString execdir) {
         this. = args;
         this. = envp;
         this. = execdir;
     }
 
     public void execute() {
          = true;
         try {
              = runExternalCommand();
         } catch (CommandExecutionException e) {
              = ;
         }
     }
 
     private int runExternalCommand() {
         try {
             File workDir = ( == null) ? null : new File();
             ProcessBuilder pb = new ProcessBuilder();
             pb.directory(workDir);
             if ( != null) {
                 pb.environment().putAll();
            }
            Process process = pb.start();
            /* Deadlock is possible if the subprocess generates enough output to overflow the system.
             * A robust solution requires draining the process stdout and stderr in separate threads. */
            InputStream processErrorStream = process.getErrorStream();
            InputStream processOutputSteam = process.getInputStream();
            ProcessReader errorReader = new ProcessReader(processErrorStream);
            errorReader.start();
            ProcessReader outputReader = new ProcessReader(processOutputSteam);
            outputReader.start();
            //allows the readers to start
            yield();
            outputReader.join();
            errorReader.join();
             = outputReader.getLines();
             = errorReader.getLines();
            return process.waitFor();
        } catch (Exception e) {
             = e;
            throw new CommandExecutionException(e);
        }
    }
    public boolean isCompleted() {
        return  != ;
    }
    public boolean wasStarted() {
        return ;
    }
    public int getExitStatus() {
        return ;
    }
    public String[] getOutputLines() {
        return  == null ? null : .toArray(new String[.size()]);
    }
    public List<StringgetOutputs() {
        return ;
    }
    public String[] getErrorLines() {
        return  == null ? null : .toArray(new String[.size()]);
    }
    public List<StringgetErrors() {
        return ;
    }
    public Exception getException() {
        return ;
    }
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