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000109_fdc@columbia.edu_Mon Jun 3 09:43:01 EDT 2002.msg
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Article: 13404 of comp.protocols.kermit.misc
Path: newsmaster.cc.columbia.edu!news.columbia.edu!news-not-for-mail
From: fdc@columbia.edu (Frank da Cruz)
Newsgroups: comp.protocols.kermit.misc
Subject: Re: Help needed
Date: 3 Jun 2002 09:42:55 -0400
Organization: Columbia University
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In article <26ca8a8f.0206030221.6d332e7f@posting.google.com>,
senthil <senthilb@comneti.com> wrote:
: I have one remote board whose serial port is connected(locally) to
: HP unix servex's MUX. Iam using C-Kermit8 to establish connection to
: the port.
: My board has a firmware which indicates the status of CTS , CD of
: the serial ports through LED's. Intially i had problems with CD not
: coming up, but after using SET CARRIER-WATCH OFF , the CD came up when
: i connected the ckermit and the CD went down when i disconnected. I
: require the same behaviour for CTS signal too. But it didnt happen.
: Intially cts was not up at all. Then setting FLOW to RTS/CTS , the CTS
: came up and it remains high even when the Ckermit session is closed.
: This is my problem. Iam using proper nullmodem cables, with cts/rts
: crossed and (dsr+cd) tied to dtr.
:
When Kermit exits or closes the device, the device driver should turn
off CTS. If it doesn't, I'd say that was a bug in HP-UX.
: My doubt is how can i make both CD and CTS behave such that, when
: i connect the C-Kermit the CD and CTS should come up and when i
: disconnect the C-Kermit, the cd and cts should go low. Since my
: testing at remote end is madatory, please give me your ideas on this
: issue.
:
Make sure no other process (such as a getty) claims the device as soon
Kermit closes it.
Detailed control of individual modem signals is not a standard function
of Unix. Some specific Unix varieties might have their own unique APIs
for this. If you want to look through the HP-UX APIs for an ioctl() that
explicitly turns CTS off and add it to the C-Kermit source, that would
be one approach. Another would be to file a bug report with HP -- Why
doesn't CTS go off when you close the device?
- Frank