Class Shell

Object
  Shell

public class Shell
extends Object

A simple command-line shell for the MiniKernel.

This program displays a prompt and waits for the user to enter command lines. A command line consists of one or more commands, separated by ampersands (&). A command is the name of a Java class that implements public static void main(String args[]), followed by zero or more arguments to the command. All the commands on the line are run in parallel. The shell waits for them to finish before issuing another prompt.

The Shell terminates if it sees end-of-file (Control-D if input is coming from the keyboard).

If this shell is invoked with any arguments, they are joined together with spaces and run as a single command line. For example,

      java Shell Test foo "& Test bar"
 

is equivalent to

      java Shell
      Shell> Test foo & Test bar
      Shell> exit
 

The Shell also has the following "built-in" commands. Any arguments are ignored.

exit

The Shell terminates immediately.

help

The Shell prints a short help message.

?

Equivalent to help.

See Also:

Kernel

Method Summary

static void

main(String[] args) The main program.

Methods inherited from class Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

main

public static void main(String[] args)

The main program.

Parameters:

args - command-line arguments. If empty, prompt the user for commands.