1 #!/bin/sh
2 
3 flag=''
4 if [ "x$1" = "x-a" ]
5 then
6 	flag=-a
7 	shift
8 fi
9 
10 case $# in
11 0)
12 	user=$USER
13 	;;
14 1)
15 	user=$1
16 	;;
17 *)
18 	echo 'usage: psu [-a] [user]' 1>&2
19 	exit 1
20 esac
21 
22 9 ps $flag | grep "^$user "