util
Class CommandLine

java.lang.Object
  util.CommandLine

public class CommandLine
extends java.lang.Object

Supports the execution of commands as they would work in a bash shell environment. This is different from using Runtime: multiple commands can be issued, and environment variables can be set. Also, input and output streams can be used. Can easily be extended to emulate other shells.

Author:

dgorur

Field Summary

static java.lang.String[]

DEFAULT_SHELL_COMMAND Default behaviour is to invoke a bash shell just as if it were a login shell, ready to accept commands.

Constructor Summary

CommandLine()
Default constructor.

CommandLine(java.lang.String[] shellCommand)
Constructs a command line and invokes the given shell commands, specified as a String array.

Method Summary

void	exec(java.lang.String command) Executes the given command, interpreted just as if it were typed into a bash shell.
void	exec(java.lang.String[] cmdArray) Executes an array of commands by concatenating them into a single command.
java.lang.String	getError() Returns the buffered error output of this process.
java.io.InputStream	getInputStream() Returns the input stream of this process.
java.lang.String	getOutput() Returns the buffered output of this process.
java.io.OutputStream	getOutputStream() Returns the output stream of this process.
static void	main(java.lang.String[] args)

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_SHELL_COMMAND

public static final java.lang.String[] DEFAULT_SHELL_COMMAND

Default behaviour is to invoke a bash shell just as if it were a login shell, ready to accept commands.

Constructor Detail

CommandLine

public CommandLine()

Default constructor. Creates a bash shell.

CommandLine

public CommandLine(java.lang.String[] shellCommand)

Constructs a command line and invokes the given shell commands, specified as a String array.

Parameters:

shellCommand - the set of desired shell commands.

Method Detail

main

public static void main(java.lang.String[] args)

exec

public void exec(java.lang.String command)

Executes the given command, interpreted just as if it were typed into a bash shell.

Parameters:

command - the desired command.

exec

public void exec(java.lang.String[] cmdArray)

Executes an array of commands by concatenating them into a single command.

Parameters:

cmdArray - the given array of commands.

getError

public java.lang.String getError()

Returns the buffered error output of this process.

Returns:

the buffered error output of this process.

getInputStream

public java.io.InputStream getInputStream()

Returns the input stream of this process. Note: this is actually the output of the process.

Returns:

the input stream of this process.

getOutput

public java.lang.String getOutput()

Returns the buffered output of this process.

Returns:

the buffered output of this process.

getOutputStream

public java.io.OutputStream getOutputStream()

Returns the output stream of this process. Note: this is actually the input to the process.

Returns:

the output stream of this process.