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HP-UX 11i Version 3: February 2007

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ups_conf — HP PowerTrust Uninterruptible Power System (UPS) monitor configuration file


The default configuration file for the HP PowerTrust UPS monitor daemon (ups_mond). Another file can be used as long as it complies with the specified format, and the monitor daemon is configured to use the alternate file (see the description of the -f option in ups_mond(1M)).

Lines in the configuration file can contain a maximum of 256 characters, and the full pathname of a UPS-tty device file can contain a maximum of 100 characters.

Only one entry per line is allowed in the configuration file. Each line begins with a keyword. All fields in configuration file entries are delimited by colons (:). Entries in the configuration file end with the first space encountered (as specified by the library function, isspace(); see isspace(3C)). Characters beyond the first space on each line are treated as comments.

The shutdown delay and timeout values should be the first lines in the file.

Entries in this file begin with keywords that must appear exactly as shown below. The terminating colon separates the keyword from the value of its parameter. ups_mond recognizes the following keywords:


The number of minutes following notification by the first upstty that its corresponding UPS is operating on internal (battery) power, before ups_mond initiates shutdown -h. The default is one minute. This value should be set to account for transient power interruptions, if they are common to the site.


The number of minutes to monitor the shutdown -h operation before initiating reboot with the halt option (RB_HALT; see reboot(2)). The default is five minutes. This value should be longer than the longest time the system requires to execute shutdown(1M). Note that after the value of shutdown_timeout_mins has elapsed, a UPS lacking AC line voltage will power off. When AC line voltage is restored, the UPS will restore power to its output. This timeout value should not be so much longer than shutdown that an observer may become impatient. It is important to note that this value is the period for which the UPS will delay its power-cycling, even if AC power is restored sooner.


This line is followed by either Y or N, which indicates if the UPS needs to be turned OFF (kill_after_shutdown:Y) or ON (kill_after_shutdown:N) upon AC line voltage failures respectively. Default is kill_after_shutdown:N.


The full pathname of the tty device special file through which the UPS is configured. Include one entry for each UPS. upstty entries are handled in the order they appear in /etc/ups_conf. Therefore, it is important to list your uninterruptible power systems in order of priority (for example, UPS protecting the SPU listed first).

upstty entries can contain following optional parameters, which can appear in any order following the upstty device special file name:


This upstty will not cause shutdown or reboot to be initiated.


The type of uninterruptible power supply. Currently, this is the only type defined and supports the entire HP UPS family, including PowerTrust. It defaults to SOLA.


The following is a sample /etc/ups_conf file:

shutdown_delay_mins:1 shutdown_timeout_mins:5 kill_after_shutdown:Y upstty:/dev/tty0p1 upstty:/dev/tty0p2:MSG_ONLY upstty:/dev/tty0p3:SOLA:MSG_ONLY upstty:/dev/tty0p5:SOLA


/dev/tty* /etc/ups_conf



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