Shell Programming and Scripting

echo "Type the Container ID for every container that you want subnets exported"
echo "for (with comma between each one, for example... 1,45,98)"
echo -n "if you want every one listed, then just type ALL in caps and press [ENTER]: "
read containerid

1,2,3,4

1
2
3
4

for j in `cat $containerid`
do
export $j
done

echo 1,2,3,4 | tr ',' '\n'

1
2
3
4

echo "Type the Container ID for every container that you want subnets exported"
echo "for (with comma between each one, for example... 1,45,98)"
echo -n "if you want every one listed, then just type ALL in caps and press [ENTER]: "
read containerid

OLDIFS="$IFS" # Save the default for later
IFS="," # This alters what variables split upon.

for X in $containerid # Usually, would split on spaces, but now splits on ,
do
        echo "containerid $x"
done

IFS="$OLDIFS" # Put it back, or things won't split normally later