Date: Thu, 11 Jul 2002 16:10:50 -0700 From: Terry Lambert <tlambert2@mindspring.com> To: bruno schwander <bruno@tinkerbox.org> Cc: Cyrille Lefevre <cyrille.lefevre@laposte.net>, hackers@FreeBSD.ORG Subject: Re: termios guru ? Message-ID: <3D2E107A.362AF9EB@mindspring.com> References: <Pine.BSF.4.21.0207111505070.7694-100000@duron.bschwand.net>
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bruno schwander wrote:
> thanks, I see the idea but cfmakeraw has some other effects... newlines
> output by the program are not translated, etc.
>
> My main program now is the VMIN/VTIME stuff. The way irit tries to use is,
> is basically to be able to do async stdin reading, but this does not
> work. Whenever I try those settings, no input is ever read by the
> program. It fgetc() constantly returns -1.
>
> Any idea why ?
In noncanonical mode input processing, input bytes are not assembled into
lines, and erase and kill processing does not occur. The values of the
VMIN and VTIME members of the c_cc array are used to determine how to
process the bytes received.
MIN represents the minimum number of bytes that should be received when
the read(2) function successfully returns. TIME is a timer of 0.1 second
granularity that is used to time out bursty and short term data transmis-
sions. If MIN is greater than { MAX_INPUT}, the response to the request
is undefined. The four possible values for MIN and TIME and their inter-
actions are described below.
What's "MAX_INPUT" set to?
Try running:
system("stty -a");
From your program, after you set the terminal modes, to make sure you set
them correctly.
Make sure you are using termios, not termio.
See also the source code to raw(3) and cbreak(3) in the curses library
source code.
-- Terry
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