1#!/bin/rc 2 3rfork e 4flag=0 5while(~ $1 -*){ 6 switch($1){ 7 case -b 8 flag=1 9 case -a 10 flag=2 11 case -c 12 flag=4 13 case -ac -ca 14 flag=6 15 case -bc -cb 16 flag=5 17 } 18 shift 19} 20 21syscall bind $1 $2 $flag >[2]/dev/null 22