Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!bpa!cbmvax!vu-vlsi!mpx1!mpx2!erik
From: erik@mpx2.mpx.com (Erik Murrey)
Newsgroups: comp.unix.wizards
Subject: question about packet mode in BSD pty's
Message-ID: <10018@mpx2.mpx.com>
Date: 20 Jun 89 01:26:02 GMT
Reply-To: erik@mpx2.mpx.com (Erik Murrey)
Distribution: usa
Organization: MPX Data Systems, Inc. ,  Wayne, PA
Lines: 28


Here is an internals question for you gurus:

Background:
	BSD 4.3 Unix
	reading from controlling pty in packet mode with 2 reads.
	(i.e. telnetd)  One to read the packet type byte,
	and the other to read the data.

Question:
	What happens if the second read is interrupted with a signal?
	Does the next read return the packet type byte again, or
	the data portion of that packet?

	Is this well defined?

Please e-mail responses.  If anyone is interested, I'll forward
the mail I get.


... Erik


-- 
Erik Murrey                            /|   //  /~~~~/  |  /
MPX Data Systems, Inc.                / | / /  /____/   |/
erik@mpx.com                         /  /  /  /        /|  Data Systems, Inc. 
{vu-vlsi, bpa, cbmvax}!mpx1!erik    /     /  /       /  |====================