Export doesnt work for a back ground process


 export START=100
 . ./other.sh &


sleep 5
export END=200

but I dont see the variable END in "export -p". But I do see it if change the pipe.sh to

 export START=100
 . ./other.sh 

how do I export variables from background process? Any work arounds?


A child process cannot change parents environment, you need to declare the variable from the parent somehow. For example using a file:


export START=100
. ./other.sh > tmp &
source tmp
rm tmp 
echo $END


sleep 5
echo "export END=200"

Also see this answer.

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