Port Monitor Responsibilities

A port monitor is responsible for performing the following tasks in addition to its port monitor function:

• Write its process id into the file _pid and place an advisory lock on the file

• Terminate gracefully on receipt of the signal SIGTERM.

• Follow the protocol for message exchange with sac

A port monitor must perform the following tasks during service invocation:

• Create a utmp entry if the requested service has the "-u" flag set in _pmtab

Port monitors may ignore this flag if creating a utmp entry for the service does not make sense because of the manner in which the service is to be invoked. On the other hand, some services may not start properly unless utmp entries have been created for them.

• Interpret the per-service configuration script for the requested service, if it exists, by calling the doconfig() library routine