Capturing the Process ID of a process Post: 302117694

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Top Forums UNIX for Dummies Questions & Answers Capturing the Process ID of a process Post 302117694 by appleforme1415 on Wednesday 16th of May 2007 03:50:10 AM

05-16-2007

Registered User

Capturing the Process ID of a process

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

appleforme1415

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LEARN ABOUT MOJAVE

rmiregistry

rmiregistry(1)						      General Commands Manual						    rmiregistry(1)

NAME

       rmiregistry - Java remote object registry

SYNOPSIS

       rmiregistry [ port ]

DESCRIPTION

       The  rmiregistry command creates and starts a remote object registry on the specified port on the current host.	If port number is omitted,
       the registry is started on port 1099.  The rmiregistry command produces no output and is typically run in the background.  For example:

	      example% rmiregistry &

       A remote object registry is a bootstrap naming service that is used by RMI servers on a host to bind remote objects to names.  Clients  can
       then look up remote objects and make remote method invocations.

       The registry is typically used to locate the first remote object on which an application needs to invoke methods.  That object in turn pro-
       vides application-specific support for finding other objects.

       The methods of the java.rmi.registry.LocateRegistry class are used to get a registry operating on a particular host or host and port.

       The URL-based methods of the java.rmi.Naming class operate on a registry and can be used to look up a remote object, bind a simple (string)
       name to a remote object, rebind a new name to a remote object (overriding the old binding), unbind a remote object, and list the URLs bound
       in the registry.

OPTIONS

       The following option is supported:

       -Joption       Used in conjunction with any java option, this option passes option (no spaces between -J and option) on to the java  inter-
		      preter.

SEE ALSO

       See (or search java.sun.com) for the following:

       java.rmi.Naming @
	    http://java.sun.com/j2se/1.5/docs/api/java/rmi/Naming.html

       java.rmi.registry.LocateRegistry @
	    http://java.sun.com/j2se/1.5/docs/api/java/rmi/registry/LocateRegistry.html

								    23 Apr 2001 						    rmiregistry(1)

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