UNIX for Dummies Questions & Answers

hi Everybody

I am trying to capture process id of a process which has been started through the execution of a shell script

Code:

CLASSPATH=.
CLASSPATH=${CLASSPATH}:sampleswing.jar
java -cp ${CLASSPATH} Sample
echo $! > pid.sh

above is the simple script file called swings.sh

When i execute swings.sh , script internally creates another java process.
I need the process id of the newly created java process and not the process id of the shell script.

Actually when i execute shell script, java process does not return until the java application is closed thru the application's exit button.so the command next to " java -cp ${CLASSPATH} Sample " does not get executed until the invoked java process is closed thru application's exit button.

In this case how can i get the process id of the java process simultaneoulsy when executing the shell script. (something like... java process should be daemon process and next line should be executed once the java process is started)

Suppose if i execute following command alone independently after running the above script without the last line in a different console , I get the process id of the newly created java process.

Code:

echo $!

My requirement is to execute shell script as well as get the process id of the java process on a single run of the shell script.

Kindly shed some light on getting the process id of the java process when executing the script.

I am storing this PID in another file for the very reason ,when java application hangs up, sometimes even after pressing ctrl+C, the process is not exiting