26 while getopts ":a:b:p:u" opts;
 27 do
 28   case $opts in.
 29     a) echo got an A flag;;
 30     b) echo got an B flag;;
 31     u) user=$OPTARGS echo $user;;
 32     p) pass=$OPTARGS echo $pass;;
 33     ?) echo I don't know what flag is this;;
 34 esac
 35 done
 36
 37 echo user: $user pass: $pass

bash-4.3$ ./functionexample.sh -p 123 -u mona