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Administering the ttymon port monitor

ttymon and the Service Access Facility

The Service Access Facility (SAF) provides a generic interface to which all port monitors must conform. ttymon is a port monitor under the SAF's controller, the Service Access Controller (SAC). (See ``The Service Access Facility'', ``Administering port monitors'', and ``Administering port services'' for a description of the SAF, the administrative files it maintains, and the commands used for port monitor and service administration.) ``How tty services are invoked'' shows how a service, which is usually a shell service, is invoked using ttymon.

How tty services are invoked

There can be multiple invocations of ttymon port monitors, each identified by a unique pmtag. Each of these port monitors can monitor multiple ports for incoming connection requests.

A port has one and only one service associated with it. Each port, and its associated service, is identified by a service tag, svctag. Service tags for any given port monitor are unique.

When the SAC daemon starts a port monitor, the port monitor reads its administrative file, which contains information about which ports to monitor and what service (that is, process) is associated with each port.


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UnixWare 7 Release 7.1.4 - 22 April 2004