[net.bugs.4bsd] modem control, zombie bugs

mark@cbosgd.UUCP (Mark Horton) (05/05/85)

We often run into two glitches on our 4.2BSD systems (both VAX and
Sun).

(1) Even though we have our conf file flags set to zero, modem control
seems to be incomplete on DH and DZ lines.  When I dial up on a DZ,
we have to hit CR to wake it up.  When I hang up on a DH, the process
isn't sent a SIGHUP, it stays around.  Yet stty 0 or having the login
shell exit does hang up.  (We have 2 16 port Able DH/DM's and 2 8
port DZ's on a 750.)  This probably hasn't happened on our Suns.
It is possible that we have something cabled wrong.

(2) Sometimes we find zombie processes sitting around waiting to be
waited on, but nobody seems to be waiting on them.  If their parent
is shot, they get inherited by init, but they still remain zombies.
Usually this is harmless, as another login shell will be started when
the first one goes away, but sometimes it can hang up a port, and it
often requires manual attention.

Has anyone run across these and know of a fix?  Are they fixed in 4.3BSD?

	Mark