: ${TMPDIR:=/tmp}
TMPOUT=${TMPDIR}/coproc-wait-$BASHPID

coproc { echo a b c; sleep 2; }

case $COPROC_PID in
[0-9]*)	;;
*)	echo COPROC_PID not integer ;;
esac

echo ${COPROC[@]}

read LINE <&${COPROC[0]}
echo $LINE

wait $COPROC_PID

coproc REFLECT { cat - ; }

case $REFLECT_PID in
[0-9]*)	;;
*)	echo REFLECT_PID not integer ;;
esac

echo ${REFLECT[@]}

echo flop >&${REFLECT[1]}
read LINE <&${REFLECT[0]}

echo $LINE

{ sleep 1; kill $REFLECT_PID; } &
wait $REFLECT_PID >$TMPOUT 2>&1 || echo "coproc.tests: REFLECT: status $?"
grep 'Terminated.*coproc.*REFLECT' < $TMPOUT >/dev/null 2>&1 || {
	echo "coproc.tests: wait for REFLECT failed" >&2
}
rm -f $TMPOUT
exec 2>&1

coproc xcase -n -u

case $COPROC_PID in
[0-9]*)	;;
*)	echo COPROC_PID not integer ;;
esac

echo ${COPROC[@]}

echo foo >&${COPROC[1]}
read <&${COPROC[0]}

echo $REPLY
echo ${COPROC[@]}

cat /etc/passwd | grep root | awk -F: '{print $1;}' | sed 1q

exec 4<&${COPROC[0]}-
exec >&${COPROC[1]}-

echo ${COPROC[@]}

read foo <&4
echo $foo >&2

exit 0