Port Monitor Requirements

To implement a port monitor, several generic requirements must be met. This section summarizes these requirements. In addition to the port monitor itself, you must supply an administrative command.

Initial Environment

When a port monitor is started, it expects an initial execution environment in which:

• It has no file descriptors open.

• It cannot be a process group leader.

• It has an entry in /var/adm/utmpx of type LOGIN_PROCESS.

• An environment variable, ISTATE, is set to enabled or disabled to indicate the port monitor's correct initial state .

• An environment variable, PMTAG, is set to the port monitor's assigned tag.

• The directory that contains the port monitor's administrative files is its current directory.

• The port monitor is able to create private files in the directory /var/saf/tag, where tag is the port monitor's tag.

• The port monitor is running with user id 0 (root).