'\" t
.\"     Title: upslog
.\"    Author: [FIXME: author] [see http://www.docbook.org/tdg5/en/html/author]
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\"      Date: 01/11/2024
.\"    Manual: NUT Manual
.\"    Source: Network UPS Tools 2.8.1
.\"  Language: English
.\"
.TH "UPSLOG" "8" "01/11/2024" "Network UPS Tools 2\&.8\&.1" "NUT Manual"
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.SH "NAME"
upslog \- UPS status logger
.SH "SYNOPSIS"
.sp
\fBupslog \-h\fR
.sp
\fBupslog\fR [\fIOPTIONS\fR]
.SH "DESCRIPTION"
.sp
\fBupslog\fR is a daemon that will poll a UPS at periodic intervals, fetch the variables that interest you, format them, and write them to a file\&.
.sp
The default format string includes variables that are supported by many common UPS models\&. See the description below to make your own\&.
.SH "OPTIONS"
.PP
\fB\-h\fR
.RS 4
Display the help message\&.
.RE
.PP
\fB\-f\fR \fIformat\fR
.RS 4
Monitor the UPS using this format string\&. Be sure to enclose
\fIformat\fR
in quotes so your shell doesn\(cqt split it up\&. Valid escapes within this string are:
.PP
%%
.RS 4
Insert a single "%"
.RE
.PP
%TIME format%
.RS 4
Insert the time with strftime formatting
.RE
.PP
%ETIME%
.RS 4
Insert the number of seconds, ala time_t\&. This is now a 10 digit number\&.
.RE
.PP
%HOST%
.RS 4
insert the local hostname
.RE
.PP
%UPSHOST%
.RS 4
insert the host of the UPS being monitored
.RE
.PP
%PID%
.RS 4
insert the pid of upslog
.RE
.PP
%VAR varname%
.RS 4
insert the value of variable varname (see NUT developer documentation chapter "Variables" on\-line or in the
docs/nut\-names\&.txt
file in sources of the NUT version you have installed for more details)
.RE
.RE
.sp
The default format string is:
.sp
.if n \{\
.RS 4
.\}
.nf
%TIME @Y@m@d @H@M@S% %VAR battery\&.charge% %VAR input\&.voltage%
%VAR ups\&.load% [%VAR ups\&.status%] %VAR ups\&.temperature%
%VAR input\&.frequency%
.fi
.if n \{\
.RE
.\}
.PP
\fB\-i\fR \fIinterval\fR
.RS 4
Wait this many seconds between polls\&. This defaults to 30 seconds\&.
.sp
If you require tighter timing, you should write your own logger using the
\fBupsclient\fR(3)
library\&.
.RE
.PP
\fB\-l\fR \fIlogfile\fR
.RS 4
Store the results in this file\&.
.sp
You can use "\-" for stdout, but upslog will remain in the foreground by default\&.
.RE
.PP
\fB\-F\fR
.RS 4
upslog will run in the foreground, regardless of logging target\&.
.RE
.PP
\fB\-B\fR
.RS 4
upslog will run in the background, regardless of logging target\&.
.RE
.PP
\fB\-s\fR \fIups\fR
.RS 4
Monitor this UPS\&. The format for this option is
upsname[@hostname[:port]]\&. The default hostname is "localhost"\&.
.RE
.PP
\fB\-m\fR \fItuple\fR
.RS 4
Monitor multiple UPSs\&. The format for this option is a tuple of ups and logfile separated by commas\&. An example would be:
upsname@hostname:9999,/var/log/nut/cps\&.log
.RE
.PP
\fB\-u\fR \fIusername\fR
.RS 4
If started as root, upslog will
\fBsetuid\fR(2) to the user id associated with
\fIusername\fR
for security\&.
.sp
If
\fIusername\fR
is not defined, it will use the value that was compiled into the program\&. This defaults to "nobody", which is less than ideal\&.
.RE
.SH "SERVICE DELAYS"
.sp
The interval value is merely the number given to \fBsleep\fR(3) after running through the format string\&. Therefore, a query will actually take slightly longer than the interval, depending on the speed of your system\&.
.SH "ON\-DEMAND LOGGING"
.sp
Sending a USR1 signal to a running \fBupslog\fR process makes it wake from the current sleep and log immediately\&. This is useful when triggered from a \fBupssched\fR event trigger (e\&.g\&. AT ONBATT or AT ONLINE) to ensure that an entry always exists, even if the power goes away for a period of time shorter than that specified by the \-i argument\&.
.SH "LOG ROTATION"
.sp
\fBupslog\fR writes its PID to upslog\&.pid, and will reopen the log file if you send it a SIGHUP\&. This allows it to keep running when the log is rotated by an external program\&.
.SH "SEE ALSO"
.SS "Server:"
.sp
\fBupsd\fR(8)
.SS "Clients:"
.sp
\fBupsc\fR(8), \fBupscmd\fR(8), \fBupsrw\fR(8), \fBupsmon\fR(8), \fBupssched\fR(8)
.SS "Internet resources:"
.sp
The NUT (Network UPS Tools) home page: https://www\&.networkupstools\&.org/