remoteshellserver.java

java写的用于远程执行程序的shell程序

import java.net.*;
import java.io.*;
import java.util.*;


class RemoteShellServer
{
	public static void main (String[] args)
	{
		if(args.length>=1)
		{	
			// the second argument is the client address filter
			if(args.length>1) CommandRunner.m_strFilter = args[1];
			// the first argument is the server port number
			int nPort = new Integer(args[0]).intValue();
			if(nPort>0)
			{
				try
				{
					// start the server and listening for client connection at given port
					ServerSocket sockServer = new ServerSocket(nPort);
					while(true)
					{
						try
						{	
							// for each client, start a new thread to execute its command
							CommandRunner cmdRunner = new CommandRunner();
							cmdRunner.m_sock = sockServer.accept();	
							new Thread(cmdRunner).start();
						}
						catch(Exception inner)
						{
							System.out.println(inner.getMessage());
							Thread.currentThread().sleep(1000);
						}
					}
				}
				catch(Exception outer)
				{
					System.out.println(outer.getMessage());	
				}
			}
			else System.out.println("Invalide port number");
		}
		else System.out.println("Invalide argument count");	
	}
}