UNIX for Dummies Questions & Answers

Hi,

I have say two programs

File1:

echo Enter A's Value
read A
export A



File2:

while [ $A -ne 20 ]
do
echo $A
sleep 5
done


Now i run File2 in background..

and then i run File1 where i will read value for A

But the message which come's from File2 is not getting changed when i change the value of A in File1 and export it...??

Do i need to creat a new environment varible...?

How do i proceed....

my suggestion is that you have a generic environment file "test.env".
In that file have say ....
TESTVALUE=1

In both scripts you might have the following ...

#!/bin/ksh
##- Environment set-up - As required, comment/uncomment -##
. $HOME/test.env

However in the first script, instead of exporting the you update the environment file with the new value. I think performing something like the following might do the trick:
sed -e "%s/TESTVALUE=.*/TESTVALUE=$A/g"

In the second script and within the loop, make the following call
. $HOME/test.env

This forces the 2nd script to rexecute the details of the environment file.

Hope I've kinda explained that right - starting to nod off - laters

Cheers,
Cameron