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#!/bin/bash
oifs=$IFS
inner () {
#recho inner: "$IFS" >&2
echo a/b/c/d
exit 0
}
outer() {
#recho outer: "$IFS" >&2
for i in 1; do
IFS=/ read m v k a < <(IFS=$oifs inner)
echo $m:$v:$k:$a
done
}
outer
unset m k v a b c d
for j in 1; do
IFS=: read a b c d
done < <(outer)
echo $a-$b-$c-$d
unset m k v a b c d
IFS=: read a b c d < <(outer)
echo $a:$b:$c:$d
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