nutupsdrv(8)

1NUTUPSDRV(8)                      NUT Manual                      NUTUPSDRV(8)
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NAME

6       nutupsdrv - generic manual for unified NUT drivers
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SYNOPSIS

9       nutupsdrv -h
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11       nutupsdrv [OPTIONS]
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DESCRIPTION

14       nutupsdrv is not actually a driver. This is a combined man page for the
15       shared code that is the core of many drivers within the Network UPS
16       Tools package.
17
18       For information on the specific drivers, see their individual man
19       pages.
20
21       UPS drivers provide a communication channel between the physical UPS
22       hardware and the upsd(8) server. The driver is responsible for
23       translating the native protocol of the UPS to the common format used by
24       the rest of this package.
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26       The core has two modes of operation which are determined by the command
27       line switches. In the normal mode, the driver will periodically poll
28       the UPS for its state and parameters. The results of this command is
29       presented to upsd. The driver will also handle setting variables and
30       instant commands if available.
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32       The driver can also instruct the UPS to shut down the load, possibly
33       after some delay. This mode of operation is intended for cases when it
34       is known that the UPS is running out of battery power and the systems
35       attached must be turned off to ensure a proper reboot when power
36       returns.
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38           Note
39           You probably don’t want to use any of these options directly. You
40           should use upsdrvctl(8) to control your drivers, and ups.conf(5) to
41           configure them. The rest of this manual describes options and
42           parameters that generally are not needed by normal users.
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OPTIONS

45       -h
46           Display a help message without doing anything else. This will also
47           list possible values for -x in that driver, and other help text
48           that the driver’s author may have provided.
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50       -a id
51           Autoconfigure this driver using the id section of ups.conf(5).
52           This argument is mandatory when calling the driver directly.
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54       -D
55           Raise the debugging level. Use this multiple times to see more
56           details. Running a driver in debug mode will prevent it from
57           backgrounding after startup. It will keep on logging information to
58           the console until it receives a SIGINT (usually Ctrl-C) or SIGTERM
59           signal.
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61           The level of debugging needed depends both on the driver and the
62           problem you’re trying to diagnose. Therefore, first explain the
63           problem you have with a driver to a developer/maintainer, before
64           sending them debugging output. More often than not, if you just
65           pick a level, the output may be either too limited or too verbose
66           to be of any use.
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68       -i interval
69           Set the poll interval for the device.
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71       -V
72           Print only version information, then exit.
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74       -L
75           Print a parseable list of driver variables. Mostly useful for
76           configuration wizard programs.
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78       -k
79           ("Kill" power) Forced shutdown mode. The UPS will power off the
80           attached load, if possible.
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82           You should use upsdrvctl shutdown whenever possible instead of
83           calling this directly.
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85       -r directory
86           The driver will chroot(2) to directory during initialization. This
87           can be useful when securing systems.
88
89           In addition to the state path, many systems will require /dev/null
90           to exist within directory for this to work. The serial ports are
91           opened before the chroot call, so you do not need to create them
92           inside the jail. In fact, it is somewhat safer if you do not.
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94       -u username
95           If started as root, the driver will setuid(2) to the user id
96           associated with username.
97
98           If you do not specify this value and start it as root, the driver
99           will switch to the default value that was compiled into the code.
100           This is typically nobody, and is far from ideal.
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102       -x var=val
103           Define a variable called var with the value of var in the driver.
104           This varies from driver to driver - see the specific man pages for
105           more information.
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107           This is like setting var=val in ups.conf(5), but -x overrides any
108           settings from that file.
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DIAGNOSTICS

111       Information about the startup process is printed to stdout. Additional
112       messages after that point are available in the syslog. After upsd(8)
113       starts, the UPS clients such as upsc(8) can be used to query the status
114       of an UPS.
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PROGRAM CONTROL

117       You should always use upsdrvctl(8) to control the drivers. While
118       drivers can be started by hand for testing purposes, it is not
119       recommended for production use.
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FILES

122       ups.conf
123           Required configuration file. This contains all details on which
124           drivers to start and where the hardware is attached.
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BUGS

127       Some of the drivers may have bugs. See their manuals for more
128       information.
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