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- Tue Apr 02 23:24:20 HST 1991 art@pilikia.pegasus.com Pg. 1
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-
- INTRODUCTION
-
- The UPS monitor daemon or "upsd" watches the serial port
- connected to an UPS and will perform an unattended shutdown
- of the system if the UPS is on battery longer than a specified
- number of minutes. Upsd needs to watch a tty with modem control
- properties, and expects the UPS to raise DCD when it switches
- to battery backup and drop DCD when it goes back to online.
- Upsd was developed and tested under ISC with the FAS 2.08 driver
- and an American Power Conversion SmartUPS 600, your milage may
- vary on other OSes and UPSes.
-
- The C source was written for system V and hence will require
- some work to get it working under BSD or other UNIXes, the
- program is built via the Makefile. A number of configurable
- defaults are in common.h, you may want to hack that file before
- making upsd. Although the program can be run manually from the
- command line, users will most likely want the program to start
- automatically from their /etc/rc script (SYS5R2) or a script
- in /etc/rc2.d (SYS5R3). The Makefile by default installs upsd
- in the /etc directory when the install target is made.
-
-
- Tue Apr 02 23:24:20 HST 1991 art@pilikia.pegasus.com Pg. 2
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- COMMAND LINE OPTIONS
-
- Upsd runtime behavior can be configured either on the command
- line or via environment variables. The command line options
- take precedence to the environment variable settings, and are
- as follows:
-
- usage: upsd [-d tty][-c cmd][-l log][-t min]
- -d tty pathname of UPS device
- -c cmd pathname of shutdown command
- -l log pathname of UPS log file
- -t min delay time in minutes
-
- The -d tty option must specify the full pathname (including the
- /dev/ prefix) to the tty device the UPS is on.
-
- Example:
-
- upsd -d /dev/ttyFM00
-
- The -c cmd option specifies the full pathname of the command
- to be executed to shut down the system. This command must
- be enclosed in quotes if it consists of 2 or more words.
-
- Example:
-
- upsd -d /dev/ttyFM00 -c "/etc/shutdown -y -g1 -i0"
-
- The -l option specified the logfile upsd will write it's event
- messages to, these messages give the date and time that the UPS
- daemon started, switched to battery, switched back to online,
- executed the shutdown command, or was terminated via SIGTERM.
-
- Example:
-
- upsd -d /dev/ttyFM00 -c "/etc/shutdown -y -g1 -i0" -l /etc/upslog
-
- Finally, the -t option specifies the number of minutes to allow
- the UPS to be on battery backup before executing the shutdown
- sequence. This number must be between 1 and 30. Be careful not
- to choose a value greater than the number of minutes of battery
- time your UPS supports with your current load. A value in the
- 5 to 10 minute range is probably sufficient.
-
- Example:
-
- upsd -d /dev/ttyFM00 -c "/etc/shutdown -y -g1 -i0" -l /etc/upslog -t 10
-
- Tue Apr 02 23:24:20 HST 1991 art@pilikia.pegasus.com Pg. 3
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-
- ENVIRONMENT VARIABLES
-
- The following environment variables can be set if that interface
- is preferred to the command line options. Note again that command
- line options override the environment variable settings.
-
-
- Environment Equivalent Default
- Variable Command line option Value
- UPSPORT -p /dev/ttyFM00
- UPSSHUT -c "/etc/shutdown -y -g1 -i0"
- UPSLOG -l /etc/upslog
- UPSTIME -t 10
-
- Note that the compiled in default values can be altered in common.h
- and the program can be recompiled. If no command line options or
- environment variables exist, the defaults will be used. The table
- above gives the environment variables looked for by the program and
- their command line option counterparts. All the rules applying to
- the command line options apply to the environment variables as well.
-
- If you have any comments or suggestions regarding my program,
- send email to the following address:
-
- Arthur W. Neilson III
- INET: art@pilikia.pegasus.com
- UUCP: uunet!ucsd!nosc!pilikia!art
-
-