who vs w

Dear Gurus,

My name is Rongdian Lu with CA.

On Suse SLES 8, we found that a  problem with "who":

If a user logged on thru console and open several terminal sessions, =
both "w" and "who" list all session users, however, when we closed the =
terminals other than the logon window, who still lists the entries, but =
"w" delisted them, which is right.

I found that utmp can detect if the terminal is closed or not either.=20

So could  you guys tell me how "w" is written?=20

thanks, Ron=20