K 10
svn:author
V 2
ed
K 8
svn:date
V 27
2009-05-24T12:32:03.863168Z
K 7
svn:log
V 544
Block when initially opening a TTY multiple times.

In the original MPSAFE TTY code, I changed the behaviour by returning
EBUSY. I thought this made more sense, because it's basically a race to
see who gets the TTY first.

It turns out this is not a good change, because it also causes EBUSY to
be returned when another process is closing the TTY. This can happen
during startup, when /etc/rc (or one of its children) is still busy
draining its data and /sbin/init is attempting to open the TTY to spawn
a getty.

Reported by:	bz
Tested by:	bz

END