rlogin drops output when stop/start characters change

[Chris Torek]

(Oops, one more.  I do not wish to seem wroth with your fix: rlogin's
handling of out of band data has long been a sore point with me,
and you have finally prodded me enough that I am investigating it.)

> "rlogind" also sends an out-of-band message if it receives a
> TIOCPKT_FLUSHWRITE packet from the master side of the pty.  (I
> haven't look at the code myself, but I'm told that the kernel never
> produces this packet type.)

Ah, but it does!  Look at the code for ptsstop and note the comment;
and compare the values of TIOCPKT_FLUSHREAD and FREAD, and those of
TIOCPKT_FLUSHWRITE and FWRITE.  Recall that a TTY stop routine is
called both for flow control (^S/^Q) and for I/O flushes (TIOCFLUSH
and signals).

The new code is certainly correct; I hope the kernel is as well.
-- 
In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 4251)
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CSNet:	chris at umcp-cs		ARPA:	chris at maryland