read line1 echo read line1 \"$line1\" exec 4<./redir3.in2 exec 5<&0 exec 0<&4 read line2 echo read line2 \"$line2\" exec 0<&5 read line3 echo read line3 \"$line3\" exec 0<&4 read line4 echo read line4 \"$line4\" exec 4<&-