ps -ef | grep "java command" - process id

[polka4ever]

Hello!

I am using this command in PERL:

system "ps -ef | grep 'java command'";

But how do i get the process ID off of this so I can kill the process? Also, I want to be very sure I am killing the correct process as well.

~p4e

 

[PaulTEG]

This might be what you're after.

Have you considered forking the child processes, rather than calling system("command");?


Paul
------------------------------------
Spend an hour a week on CPAN, helps cure all known programming ailments ;-)

 

[polka4ever]

Ok - i'm trying to read up on "fork" now. I haven't ever used this before, and i'm very new to perl.

I guess, what I was thinking was that perhaps I could maybe take `ps -ef | grep "java command"` in as a variable ($var) and then maybe substr ($var, 8, 7) - and then kill whatever the value of substr is?

 

[PaulTEG]

problem with that is you need to be sure no other process is running with the same name

Paul
------------------------------------
Spend an hour a week on CPAN, helps cure all known programming ailments ;-)

 

[ishnid]

It probably makes it a bit easier if you don't have your "grep" in the system command you're executing. The problem there is that the grep process will also grep itself, as its output from "ps" also contains "java command".

This will give you an array of all the PIDs that match "java_command":

my @pids = map +( split )[1], grep /java command/, `ps -ef`;

If you want to kill all those processes, you can then do:

kill 9, @pids;