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docs/man/dummy-ups.8
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docs/man/dummy-ups.8
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'\" t
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.\" Title: dummy-ups
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.\" Author: [see the "AUTHOR" section]
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.\" Generator: DocBook XSL Stylesheets v1.75.2 <http://docbook.sf.net/>
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.\" Date: 12/24/2010
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.\" Manual: NUT Manual
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.\" Source: Network UPS Tools
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.\" Language: English
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.\"
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.TH "DUMMY\-UPS" "8" "12/24/2010" "Network UPS Tools" "NUT Manual"
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.\" -----------------------------------------------------------------
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.\" * Define some portability stuff
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.\" -----------------------------------------------------------------
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.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.\" http://bugs.debian.org/507673
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.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
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.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.ie \n(.g .ds Aq \(aq
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.el .ds Aq '
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.\" -----------------------------------------------------------------
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.\" * set default formatting
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.\" -----------------------------------------------------------------
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.\" disable hyphenation
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.nh
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.\" disable justification (adjust text to left margin only)
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.ad l
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.\" -----------------------------------------------------------------
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.\" * MAIN CONTENT STARTS HERE *
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.\" -----------------------------------------------------------------
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.SH "NAME"
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dummy-ups \- Driver for multi\-purpose UPS emulation
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.SH "NOTE"
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.sp
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This man page only documents the specific features of the dummy\-ups driver\&. For information about the core driver, see \fBnutupsdrv\fR(8)\&.
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.SH "DESCRIPTION"
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.sp
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This program is a multi\-purpose UPS emulation tool\&. Its behavior depends on the running mode:
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.SS "Dummy Mode"
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.sp
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\fBdummy\-ups\fR looks like a standard device driver to \fBupsd\fR(8) and allows to change any value for testing purposes\&. It is both interactive, controllable through the \fBupsrw\fR(1) and \fBupscmd\fR(1) commands (or equivalent graphical tool), and batchable through script files\&. It can be configured, launched and used as any other real driver\&. This mode is mostly useful for development and testing purposes\&.
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.SS "Repeater Mode"
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.sp
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\fBdummy\-ups\fR acts as a NUT client, simply forwarding data\&. This can be useful for supervision purposes\&. This can also allow some load sharing between several UPS instances, using a point\-to\-point communication with the UPS\&.
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.SH "IMPLEMENTATION"
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.sp
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The port specification depends on the running mode, and allows the driver to select the right mode\&.
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.SS "Dummy Mode"
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.sp
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Port is a definition file name for \fBdummy\-ups\fR\&. This can either be an absolute or a relative path name\&. In the latter case the NUT sysconfig directory (ie /etc/nut, /usr/local/ups/etc, \&...) is prepended\&.
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.sp
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For instance:
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.sp
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.if n \{\
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.RS 4
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.\}
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.nf
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[dummy]
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driver = dummy\-ups
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port = evolution500\&.dev
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desc = "dummy\-ups in dummy mode"
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.fi
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.if n \{\
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.RE
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.\}
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.sp
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This file is generally named "something\&.dev"\&. It contains a list of all valid data and associated values, and has the same format as an \fBupsc\fR(8) dump (<varname>: <value>)\&. So you can easilly create definition files from an existing UPS using "upsc > file\&.dev"\&. It can also be empty, in which case only a basic set of data is available: device\&.\fB, driver\&.\fR, ups\&.mfr, ups\&.model, ups\&.status
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.sp
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Samples definition files are available in the "data" directory of the nut source tree, and generally in the sysconfig directory of your system distribution\&.
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.sp
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Since \fBdummy\-ups\fR will loop on reading this file, you can dynamically modify it to interact with the driver\&. This will avoid message spam into your system log files, if you are using NUT default configuration\&.
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.sp
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You can also use the "TIMER <seconds>" instruction to create scheduled events sequences\&. For example, the following sequence will loop on switching ups\&.status between "OL", "OB" and "OB LB" every minute:
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.sp
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.if n \{\
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.RS 4
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.\}
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.nf
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ups\&.status: OL
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TIMER 60
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ups\&.status: OB
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TIMER 60
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ups\&.status: LB
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TIMER 60
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.fi
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.if n \{\
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.RE
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.\}
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.sp
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It is wise to end the script with a TIMER\&. Otherwise dummy\-ups will directly go back to the beginning of the file\&.
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.SS "Repeater Mode"
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.sp
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Port is the name of a remote UPS, using the NUT form, ie:
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.sp
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.if n \{\
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.RS 4
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.\}
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.nf
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<upsname>[@<hostname>[:<port>]]
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.fi
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.if n \{\
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.RE
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.\}
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.sp
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For instance:
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.sp
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.if n \{\
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.RS 4
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.\}
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.nf
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[repeater]
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driver = dummy\-ups
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port = ups@hostname
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desc = "dummy\-ups in repeater mode"
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.fi
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.if n \{\
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.RE
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.\}
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.SH "INTERACTION"
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.sp
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Once the driver is loaded in dummy mode, you can change any variables, except those of the driver\&.* and server\&.* collections\&. You can do this by either editing the definition file, or use the \fBupsrw\fR(1) and \fBupscmd\fR(1) commands\&.
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.sp
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Note that in simulation mode, new variables can be added on the fly, by adding these to the definition file\&. Conversely, if you need to remove variable (such as transient ones, like ups\&.alarm), simply update these by setting an empty value\&. As a result, they will get removed from the data\&.
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.sp
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In repeater mode, the driver acts according to the capabilities of the UPS, and so support the same instant commands and settable values\&.
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.SH "BACKGROUND"
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.sp
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This driver was written in one evening to replace the previous dummycons testing driver\&. It was too limited and required to work from a terminal to interact\&.
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.sp
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\fBdummy\-ups\fR is useful for NUT client development, and other testing purpose\&.
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.sp
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It also helps the NUT Quality Assurance effort, by automating some tests on the NUT framework\&.
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.sp
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It now offers a repeater mode\&. This will help in building the Meta UPS approach, which allows to build a virtual device, composed of several other devices (either UPS, PDUs)\&.
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.SH "BUGS"
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.sp
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Instant commands are not yet supported in Dummy Mode, and data need name/value checking enforcement, as well as boundaries or enumeration definition\&.
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.SH "AUTHOR"
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.sp
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Arnaud Quette
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.SH "SEE ALSO"
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.sp
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\fBupscmd\fR(1), \fBupsrw\fR(1), \fBups.conf\fR(5), \fBnutupsdrv\fR(8)
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.SS "Internet Resources:"
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.sp
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The NUT (Network UPS Tools) home page: http://www\&.networkupstools\&.org/
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