envstat —
utility to handle environmental sensors
  
    | envstat | [ -DfIklSTWx] [-cfile] [-ddevice] [-iinterval] [-sdevice:sensor,...] [-wwidth] | 
envstat is a utility that handles various aspects of the
  sensors registered with the
  envsys(4) framework. It is
  capable of displaying sensor values as well as changing parameters and setting
  critical limits for the sensors.
In display mode, column widths as well as displayed sensors are
    fully customizable. Critical limits or other properties can be set via the
    configuration file. If critical limits were set previously, the display mode
    will show the critical limits in addition to the current values.
The following options are available:
  - -c
- Accepts a file as argument to set properties for sensors in devices
      registered with the framework. See the
      envsys.conf(5) manual
      page for more information.
- -D
- Display the names of the devices that are currently registered with the
      envsys(4) framework, one per
      line, along with some properties for the device (for example, its refresh
      timeout value).
- -ddevice
- Display only the sensors for the given device. This
      is useful when there are multiple devices registered and you want to only
      see results from a specific device.
- -f
- Display temperature values in degrees Fahrenheit. The default is to
      display temperature values in degrees Celsius.
- -I
- This flag skips the sensors with invalid state; these are normally shown
      using the “N/A” string by default.
- -iinterval
- Repeat the display every interval seconds. Note that
      some devices do not provide fresh values on demand. See the individual
      device's manual page for meaningful values for
      interval. If not specified, or specified as 0,
      envstatproduces one round of values and
    exits.
- -k
- Display temperature values in Kelvin. The default is to display
      temperature values in degrees Celsius.
- -l
- List the names of all supported sensors, one per line. Use of this flag
      causes envstatto ignore all other option
    flags.
- -r
- This flag is provided for compatibility reasons and there's no need to use
      it. In the previous implementation, it was used to enable the row mode;
      this mode is now the default.
- -S
- This flag is used to restore defaults to all devices registered with the
      framework. This will remove all properties that were set in the
      configuration file to the setting that the devices use by default.
- -sdevice:sensor,...
- Restrict the display to the named devices and sensors. The pair device and
      sensor description must be supplied as a comma separated list. Device as
      well as sensor descriptions are case sensitive. Note that the order of the
      arguments given does not influence the order of output.
- -T
- Create and display max, min and average statistics for a sensor. Must be
      used with an interval, otherwise statistics cannot
      be collected up. Please note that to get realistic values a lower interval
      value should be used, but that will also increase overhead.
- -wwidth
- Use width as the column width for the output. Each
      column is additionally separated by a single space. The default is the
      length of the longest sensor name.
- -W
- This option has no effect. It is retained for historical reasons.
- -x
- Shows the raw XML property list used by the
      sysmon_envsys(9)
      framework that contains details about all registered devices and
    sensors.
The display mode may show some values with abbreviated units; for example:
  - A
- Amperes
- Ah
- Ampere-hours
- degC
- degrees Celsius
- degF
- degrees Fahrenheit
- K
- Kelvin
- Ohms
- Ohms
- RPM
- Revolutions per minute
- V
- Volts DC
- VAC
- Volts AC
- W
- Watts
- Wh
- Watt-hours
- %rH
- relative Humidity
 
To display the “charge” sensor of the device
  acpibat0 in one line every ten seconds:
$ envstat -s
  "acpibat0:charge" -i 10
To list the devices that are currently registered with
    envsys(4):
$ envstat -D
To display the sensors of the device
  aibs0:
$ envstat -d aibs0
To set all properties specified in the configuration file:
$ envstat -c
  /etc/envsys.conf
To remove all properties that were set previously in the
    configuration file:
$ envstat -S
To display statistics for all sensors and ignoring sensors with
    invalid states every second:
$ envstat -ITi1
units(1),
  proplib(3),
  acpiacad(4),
  acpibat(4),
  acpitz(4),
  admtemp(4),
  aibs(4),
  amdtemp(4),
  aps(4),
  arcmsr(4),
  battery_pmu(4),
  cac(4),
  coretemp(4),
  dbcool(4),
  envctrl(4),
  envsys(4),
  finsio(4),
  hythygtemp(4),
  ipmi(4),
  itesio(4),
  lm(4),
  lmtemp(4),
  mfi(4),
  nsclpcsio(4),
  owtemp(4),
  pic16lc(4),
  smsc(4),
  tctrl(4),
  thinkpad(4),
  tm121temp(4),
  ug(4),
  viaenv(4),
  envsys.conf(5)
envstat appeared in NetBSD 1.5.
  It was completely rewritten from scratch for NetBSD
  5.0.
The envstat utility that appeared in
  NetBSD 5.0 was written by Juan Romero
  Pardines. The previous version was written by Bill
  Squier.
When displaying statistics using the -T option, the
  average value is an average of the minimum, maximum, and current sensor
  values. It is not an average of all current values displayed during the
  session.