org.mbari.siam.utils
Class SystemCall

java.lang.Object
  org.mbari.siam.utils.SystemCall

public class SystemCall
extends java.lang.Object

SystemCall is a simple JNI interface to the C runtime "system()" call.

The problem with Runtime.exec() is that the created Process does not have its own terminal or console. All standard I/O is read/written to the streams created with the Process, which by default have no readers or writers. This causes problems in running shell scripts or running in background mode

Constructor Summary

SystemCall()

Method Summary

static int	call(java.lang.String callString) Call the system() C run-time call
static boolean	isLoaded() Return true if System.loadLibrary() call succeeded, false if not.
static void	main(java.lang.String[] args) Main routine, for unit testing only

Methods inherited from class java.lang.Object

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

Constructor Detail

SystemCall

public SystemCall()

Method Detail

call

public static int call(java.lang.String callString)

Call the system() C run-time call

Parameters:

callString - String to pass to the system() call

isLoaded

public static boolean isLoaded()

Return true if System.loadLibrary() call succeeded, false if not.

main

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

Main routine, for unit testing only

Parameters:

args - - args[0] is passed to system() To test a call that itself has arguments, enclose the entire string in quotes; e.g. java moos.utils.SystemCall "echo this is a test"

Throws:

java.io.IOException