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GNU cfengine

1.3 Cfengine hard classes

A single class can be one of several things:

• The name of an operating system architecture e.g. ultrix, sun4 etc. This is referred to henceforth as a hard class.

• The (unqualified) name of a particular host. If your system returns a fully qualified domain name for your host, cfagent truncates it so as to unqualify the name.

• The name of a user-defined group of hosts.

• A day of the week (in the form Monday Tuesday Wednesday..).

• An hour of the day (in the form Hr00, Hr01 ... Hr23).

• Minutes in the hour (in the form Min00, Min17 ... Min45).

• A five minute interval in the hour (in the form Min00_05, Min05_10 ... Min55_00)

• A day of the month (in the form Day1 ... Day31).

• A month (in the form January, February, ... December).

• A year (in the form Yr1997, Yr2001).

• An arbitrary user-defined string. (see the reference manual).

• The ip-address octets of any active interface, in the form (ipv4_192_0_0_1, ipv4_192_0_0,ipv4_192_0,ipv4_192).

To see all of the classes define on a particular host, run

host# cfagent -p -v

as a privileged user. Note that some of the classes are set only if a trusted link can be established with cfenvd, i.e. if both are running with privilege, and the `/var/cfengine/env_data' file is secure.