Ubuntu Manpage: powerman.dev - PowerMan device specification files

NAME

       powerman.dev - PowerMan device specification files

DESCRIPTION

PowerMan device specifications are rather wierd. For this reason, we suggest that you
leave the writing of these scripts to the PowerMan authors. However, if you insist, here
is how they work.

Note: the authors do not guarantee that the PowerMan specification language will not
change, however we are open to taking on maintenance of scripts submitted by PowerMan
users. We can't guarantee that we'll be able to test new releases against all devices but
we'll do our best not to break anything. NOTE: the best way to help us in this endeavor
is to provide a ``simulator'' for your power controller and associated tests in the test
subdirectory of the powerman source code. See the examples in that directory.

By convention, device scripts are one device per file and are included as needed from a
powerman.conf file, like this:

include "/etc/powerman/icebox3.dev"

A device script is surrounded by an outer block:

specification "my_device_name" {
# configuration settings
# script blocks
}

The possible configuration settings are:

timeout <float>
(optional) device script timeout in seconds - applies to each script, the whole
thing, not just a particular "expect".

plug name { <string list> }
(optional) if plug names are static, they should be defined. Any reference to a
plug name in the powerman.conf must match one of the defined plug names.

pingperiod <float>
(optional) if a ping script is defined, and pingperiod is nonzero, the ping script
will be executed periodically, every <float> seconds.

Script blocks have the form:

script <script_name> {
# statements
}

Script blocks should all be grouped together with no config lines in between. Scripts are
for performing particular operations such as power on, get power status, etc. The various
script names are listed below. Those marked with [%s] are called with a plug name
"argument", which can be included in a send statements by including a %s (printf style).
Warning: all the send strings are processed with printf and you can cause powermand to
segfault if you include any printf tokens other than the appropriate zero or one %s.

login Executed immediately on (re-)connect. If you need to login to the box, do it here.
This is also a good place to descend through a first layer of menus. Caveat: %
occurring in passwords must be escaped as %%. Caveat: occurs outside of client
session so cannot be debugged with -T. A trick when debugging is to move this code
into the status script temporarily so you can see what is going on.

logout Executed prior to disconnect. Get device in a state so login script will work
(though hopefully disconnecting will do that too).

status_all, status[%s]
Obtain plug state for all plugs or only the specified plug. When all plugs of a
device are involved in a plug status query, the status_all script, if defined, will
be called in preference to the status script; otherwise the status script is called
for each plug.

on_all, on_range[%s], on[%s]
Power on all plugs, a range of plugs, or the specified plug.

off_all, off_range[%s], off[%s]
Power off all plugs, a range of plugs, or the specified plug.

cycle_all, cycle_range[%s], cycle[%s]
Power cycle all plugs, a range of plugs, or the specified plug. The intent of this
command was to map to the RPC's cycle command; however, device script are
increasingly implementing this in terms of a power off/delay/power so the off time
can be controlled by the script.

status_soft_all, status_soft[%s]
Obtain soft power state for all plugs or only the specified plug. Soft Power
refers to the "standby state" of the node. On means the node is powered up. Off
means either the node is powered off at the plug or is powered on at the plug and
in standby mode. This is really only useful on devices that include both a plug
relay and a probe into the node attached to a non-standby power source.

status_temp_all, status_temp[%s]
Obtain temperature reading for all plugs or only the specified plug. Temperature
is obtained by sampling a thermocouple in the node. Results are reported as a text
string - not interpreted by Powerman beyond any regex chopping done by the script.

status_beacon_all, status_beacon[%s]
Obtain beacon state for all plugs or only the specified plug. Some RPC's include a
way to flash a light on a node.

beacon_on[%s]
Flash beacon on the specified plug.

beacon_off[%s]
Clear beacon on the specified plug.

reset_all, reset_range[%s], reset[%s]
Reset all plugs, a range of plugs, or only the specified plug. Reset refers to
signaling a motherboard reset butten header, not a plug cycle.

Within a script, the following statements can be used:

send <string>
Send <string> to the device.

delay <float>
Pause script for <float> seconds.

expect <string>
<string> is compiled as a regular expression with regcomp(3). The regular
expression is matched against device input. The script blocks until the regex is
matched or the device timeout occurs (in which case the script is aborted). Upon
matching, any parenthesized expressiones are assigned to variables: $1 for the
first match, $2 for the second match, and so on. Warning: some implementations of
regex(3) silently fail if the regular expression exceeds available static storage.

setplugstate [<string>|<regmatch>] <regmatch> [off=<string>] [on=<string>]
Set the plug state. The first argument, if present, is the literal plug name or a
<regmatch> from the previous expect which contains the plug name. If omitted, the
plug name is presumed to be the script argument. The off and on strings are
compiled regexes, which if matched by the second argument, result in the plug state
being set to off or on. Yes we are applying regexes to regmatches! If no off or
on strings are provided, state will be unknown.

ifoff, ifon
Script statements enclosed in an ifon/ifoff block are conditional executed based on
the state of the plug passed in as an argument. Ifon/ifoff blocks can only be used
in single plug scripts that take an argument.

foreachplug
Script statements enclosed in a foreachplug block are executed iteratively with a
%s argument defined for each target plug. Foreachplug blocks can only be used in
all plug scripts that take no argument.

Script terminals are defined as follows:

<float>
decimal number - exponent forms not supported

<string>
Text surrounded by double quotes. May contain C style backslash-escaped
characters, including three digit octal values, and most common backslash-escaped
single character values.

<string list>
Multiple <string> values separated by white space.

<script_name>
Name of script (see above).

<regmatch>
Results of a parenthesized regular expression match are assigned to $1, $2, ... $N.

FILES

       /etc/powerman/*.dev

ORIGIN

       PowerMan was originally developed by  Andrew  Uselton  on  LLNL's  Linux  clusters.   This
       software is open source and distributed under the terms of the GNU GPL.

NAME

DESCRIPTION

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ORIGIN

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