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From: "C. Woody Butler" <charles DOT butlerjr AT constellation DOT com>
Subject: trying to get the process id for a spawned process to wait for it
Date: Tue, 17 May 2011 18:45:23 +0000 (UTC)
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Hi - I'm trying to launch a set number of threads, 
wait for them to finish, launch another set of 
threads, wait and repeat until there's no more input.

so - I've got this (this is in the middle 
of a loop reading a file):

Jobs=$Jobs + 1

/tibcoresources/appmanage.exe <<lots of params>> &

PID=$!

echo $PID is the process

if [[ $Jobs -gt 2 ]]
then
{
	echo pausing
	wait $PID
	Jobs=0
	echo starting
}
fi

But - I don't get anything back from $! 
so the wait doesn't wait and I end up 
launching a bunch of processes and taking 
down the server, etc, etc, etc.

What am I doing wrong here? 

--woody


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