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SENSORSD(8) DragonFly System Manager's Manual SENSORSD(8)
sensorsd -- hardware sensors monitor
sensorsd [-d] [-c check]
The sensorsd utility retrieves sensor monitoring data like fan speed,
temperature and voltage via sysctl(3). When the state of any monitored
sensor changes, an alert is sent using syslog(3) and a command, if speci-
fied, is executed.
By default, sensorsd monitors status changes on all sensors that keep
their state, thus sensors that automatically provide status do not
require any additional configuration. In addition, for every sensor, no
matter whether it automatically provides its state or not, custom low and
high limits may be set, so that a local notion of sensor status can be
computed by sensorsd, indicating whether the sensor is within or is
exceeding its limits.
Limit and command values for a particular sensor may be specified in the
sensorsd.conf(5) configuration file. This file is reloaded upon receiv-
The options are as follows:
Check sensors every check seconds. The shortest reporting period
for state changes will be three times this value. The default is
-d Do not daemonize. If this option is specified, sensorsd will run
in the foreground.
/etc/sensorsd.conf Configuration file for sensorsd.
sysctl(3), syslog(3), sensorsd.conf(5), syslogd(8)
The sensorsd program first appeared in OpenBSD 3.5 and was imported into
Certain sensors may flip status from time to time. To guard against
false reports, sensorsd implements a state dumping mechanism. However,
this inevitably introduces an additional delay in status reporting and
command execution, e.g. one may notice that sensorsd makes its initial
report about the state of monitored sensors not immediately, but about 60
seconds after it is started.
DragonFly 5.3 October 19, 2008 DragonFly 5.3