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000110_fdc@watsun.cc.columbia.edu_Sun Nov 4 18:15:11 EST 2001.msg
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Article: 12928 of comp.protocols.kermit.misc
Path: newsmaster.cc.columbia.edu!watsun.cc.columbia.edu!fdc
From: fdc@watsun.cc.columbia.edu (Frank da Cruz)
Newsgroups: comp.unix.sco.misc,comp.protocols.kermit.misc
Subject: Re: Dropping DTR in OSR5
Date: 4 Nov 2001 23:15:45 GMT
Organization: Columbia University
Lines: 38
Message-ID: <9s4i71$qqa$1@newsmaster.cc.columbia.edu>
References: <9s40rp$fdh$1@newsmaster.cc.columbia.edu> <3be5c667$0$439$8eec23a@newsreader.tycho.net>
NNTP-Posting-Host: watsun.cc.columbia.edu
X-Trace: newsmaster.cc.columbia.edu 1004915745 27466 128.59.39.2 (4 Nov 2001 23:15:45 GMT)
X-Complaints-To: postmaster@columbia.edu
NNTP-Posting-Date: 4 Nov 2001 23:15:45 GMT
Xref: newsmaster.cc.columbia.edu comp.unix.sco.misc:139884 comp.protocols.kermit.misc:12928
In article <3be5c667$0$439$8eec23a@newsreader.tycho.net>,
John DuBois <spcecdt@deeptht.armory.com> wrote:
: In article <9s40rp$fdh$1@newsmaster.cc.columbia.edu>,
: Frank da Cruz <fdc@watsun.cc.columbia.edu> wrote:
: >But the real problem is that when Kermit *does* try to drop DTR briefly,
: >it never comes back on...
: >
: > cfgetospeed() and cfgetispeed() to get the speeds.
: > cfsetospeed() and cfsetispeed() to set the speed to 0.
: > tcsetattr() to make the speed changes take effect.
: > (pause)
: > cfsetospeed() and cfsetispeed() to restore the original speeds.
: > tcsetattr() to make the speed changes take effect.
:
: Some problems in this area were fixed in 5.0.6a. Please test on that release
: and see if you still encounter this problem.
:
Unfortunately I don't have access to a 5.0.6a system that I can dial out
from.
: >Speaking of modem signals, how are we supposed to read them? The TIOCMGET
: >ioctl() fails with error 22 ("invalid argument").
:
: This is how I know you aren't using 5.0.6a :)
:
Besides that I said I was using 5.0.5? :-) (More or less the same behavior
occurs on 5.0.2 -- the difference being that in 5.0.5 DTR and RTS both go
down and stay down; in 5.0.2 DTR and RTS both go down, DTR comes back up
but RTS does not, so the modem still won't listen to commands.)
: TIOCMGET/TIOCMSET/etc. were first implemented in the sio driver in that
: release. In earlier releases, support for these ioctls was present only in
: certain 3rd party serial drivers.
:
So is it true to say that in OSR5.0.5 and earler just plain can't hang up
a modem by any means short of closing the device and reopening it?
- Frank