# tests of ksh93-like dup-and-close redirection operators
exec 9<$0

f()
{
exec 5<$0

exec 0<&5-

while read line; do
	echo "$line"
done
}

f

typeset -f f

# make sure it was closed
read -u 5 foo 2>&1 | grep -q 'invalid file descriptor' 
echo after read

exec 5<&0

exec <&-

read abcde 2>&1 | grep -q 'read error'

exec 0<&9-
read line
echo $line