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RE: OT:UNIX: Anyway to run this in the background and return to ca

From: Matthew Zito <>
Date: Fri, 22 Aug 2003 13:44:33 -0800
Message-ID: <>


Errrm - this script doesn't do what I think you're trying to do. Perl starts, it forks a child process, the parent process "does a bunch of stuff", but the child process only runs ps once. Soooo, you end up with a zombie child process (until the parent is done with its business) and a parent process that is doing all the work.  

A better solution would be to reverse the ps and the "doing stuff". Let the child process do the dirty work and let the parent focus on either generating more children or status monitoring the existing children. You could use a loop that watches for the existence of a particular pid or has a set condition and add a SIGCHLD handler that will handle cleanup of the child and remove the loop condition.  



Matthew Zito
GridApp Systems
Cell: 646-220-3551
Phone: 212-358-8211 x 359 <>

-----Original Message-----

Mladen Gogala
Sent: Friday, August 22, 2003 2:04 PM
To: Multiple recipients of list ORACLE-L ca

use strict;
use bytes;
my $pid=0;
if (!defined ($pid=fork())) { die "Problem with cutlery:$!\n"} elsif ($pid) { print "Do stuff here\n";

               print "Cutlery is back\n";
else {
         open(SPY,"ps -ef|grep sqlplus|");
         while (<SPY>) {    print;}



Mladen Gogala
Oracle DBA

-----Original Message-----
Sent: Friday, August 22, 2003 1:25 PM
To: Multiple recipients of list ORACLE-L ca

$ORACLE_HOME/bin/sqlplus "/ as sysdba" << EOD select ......
echo "this is a test"
ps -ef|grep sqlplus

I wish to put that into a unix command but at the same time run it in the background and return back to the parent script to do some other stuff?

Anyone done this?  

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Author: Matthew Zito

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