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From: rdt@unxrdt.unx.dec.com (Roy Tarantino)
Newsgroups: comp.unix.bsd,comp.unix.aix
Subject: Need Getty Modem Control Details
Date: 1 Dec 1993 22:32:15 GMT
Organization: OrgFreeware
Lines: 17
Distribution: world
Message-ID: <2dj61f$81f@jac.zko.dec.com>
Reply-To: rdt@unxrdt.unx.dec.com (Roy Tarantino)
NNTP-Posting-Host: unxrdt.unx.dec.com
Keywords: getty, modem, control, open
Hi,
I need to find out exactly how getty deals with dial
in lines and what the relationship between modem
control signals and the behavior of getty
and tty device drivers under various unix systems are.
For example, I noticed that under aix, an
open("/dev/ttyxx", O_RDRWR) with a modem connected
to it, does not return until a call comes in (the modems
sync and carrier comes up). However, on bsd and osf systems,
the same call returns immediately. Could someone explain
what is happening and/or refer me to a good reference.
Thanks,
Roy