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           This man page only documents the specific features of the dummy-ups
           driver. For information about the core driver, see nutupsdrv(8).


           This program is a multi-purpose UPS emulation tool. Its behavior
           depends on the running mode:
       Dummy Mode
           dummy-ups looks like a standard device driver to upsd(8) and allows one
           to change any value for testing purposes. It is both interactive,
           controllable through the upsrw(1) and upscmd(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.
       Repeater Mode
           dummy-ups 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.


           The port specification depends on the running mode, and allows the
           driver to select the right mode.
       Dummy Mode
           Port is a definition file name for dummy-ups. 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.
           For instance:
                       driver = dummy-ups
                       port =
                       desc = "dummy-ups in dummy mode"
           This file is generally named "". It contains a list of all
           valid data and associated values, and has the same format as an upsc(8)
           dump (<varname>: <value>). So you can easily create definition files
           from an existing UPS using "upsc >". It can also be empty, in
           which case only a basic set of data is available: device., driver.,
           ups.mfr, ups.model, ups.status
           Samples definition files are available in the "data" directory of the
           nut source tree, and generally in the sysconfig directory of your
           system distribution.
           Since dummy-ups 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.
       Repeater Mode
           Port is the name of a remote UPS, using the NUT form, ie:
           For instance:
                           driver = dummy-ups
                           port = ups@hostname
                           desc = "dummy-ups in repeater mode"


           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 upsrw(1) and
           upscmd(1) commands.
           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
           In repeater mode, the driver acts according to the capabilities of the
           UPS, and so support the same instant commands and settable values.


           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.
           dummy-ups is useful for NUT client development, and other testing
           It also helps the NUT Quality Assurance effort, by automating some
           tests on the NUT framework.
           It now offers a repeater mode. This will help in building the Meta UPS
           approach, which allows one to build a virtual device, composed of
           several other devices (either UPS, PDUs).


           Instant commands are not yet supported in Dummy Mode, and data need
           name/value checking enforcement, as well as boundaries or enumeration


           Arnaud Quette



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