---
name: "environ"
section: "4"
platform: "openbsd"
package: "man"
version: "8.0-current-20261101"
release: "OpenBSD 8.0-current (2026-11-01)"
platforms: ["openbsd"]
url: "https://new.carta.tech/environ/4"
---

# environ(4)

SPARC64 temperature sensor

## NAME

**environ** – SPARC64 temperature sensor

## SYNOPSIS

**environ\* at fhc?**

## DESCRIPTION

The **environ** driver provides support for the temperature sensor found on the boards of Sunfire, Starfire, and Wildfire UltraSPARC systems. The temperature readings are made available through the [sysctl(8)](/sysctl/8.md) interface.

## SEE ALSO

[fhc(4)](/fhc/4.md), [intro(4)](/intro/4.md), [sensorsd(8)](/sensorsd/8.md), [sysctl(8)](/sysctl/8.md)

## HISTORY

The **environ** driver first appeared in OpenBSD 4.3.

## AUTHORS

The **environ** driver was written by Mark Kettenis ⟨*kettenis@openbsd.org*⟩.