Carrier Detection in Solaris 8 for Dial in and Null Modem Connections Post: 302820971

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Operating Systems Solaris Carrier Detection in Solaris 8 for Dial in and Null Modem Connections Post 302820971 by rstor on Thursday 13th of June 2013 05:44:34 PM

06-13-2013

Registered User

@DGPickett

When using the null modem cable on the FreeBSD machine to another computer terminal, I receive the login prompt when the null modem cable is connected, and when I login, and then disconnect the cable and reconnect the cable again I receive the login prompt again. It appears the getty process in FreeBSD is detecting the carrier loss when the cable is disconnected and ending the previous login session. This is the correct behaviour to my understanding.

However on the Solaris system, when the null modem cable is connected to another computer terminal, if I login, and then disconnect the cable and then connect it back again I am still logged in at the shell. This means that on the Solaris machine it did not detect the carrier loss when the null modem cable was disconnected.

Since I have tried the same null modem cable on both the FreeBSD machine and the Solaris machine, I am thinking it has something to do with either a configuration setting in Solaris itself, the hardware on which Solaris is running on, or something else? ....

rstor

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LEARN ABOUT X11R4

liebert

LIEBERT(8)							    NUT Manual								LIEBERT(8)

NAME

       liebert - Driver for Liebert contact-closure UPS equipment

NOTE

       This man page only documents the hardware-specific features of the liebert driver. For information about the core driver, see nutupsdrv(8).

SUPPORTED HARDWARE

       This driver supports some Liebert UPS equipment with a contact-closure interface. This includes the UPStation GXT2 with their
       contact-closure cable. The smart mode ("Multilink") cable is not supported by this driver.

EXTRA ARGUMENTS

       This driver does not support any extra settings in the ups.conf(5).

BUGS

       This driver does not yet support shutdowns by raising DTR. Be aware that shutdowns are not possible with the stock contact-closure cable.
       You may have to build another cable with DTR connected through to the UPS for it to work.

       There is no way for this driver to detect the hardware or cable. It will start up successfully even if no UPS is present. This is a
       fundamental limitation of any contact-closure driver.

SEE ALSO

   The core driver:
       nutupsdrv(8)

   Internet resources:
       The NUT (Network UPS Tools) home page: http://www.networkupstools.org/

Network UPS Tools						    05/21/2012								LIEBERT(8)