---
name: "glenv"
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/glenv"
---

# glenv(4)

Genesys Logic GL518SM temperature, voltage, and fan sensor

## NAME

**glenv** – Genesys Logic GL518SM temperature, voltage, and fan sensor

## SYNOPSIS

**glenv\* at iic?**

## DESCRIPTION

The **glenv** driver provides support for the Genesys Logic GL518SM hardware monitor to be used with the [sysctl(8)](/sysctl/8.md) interface.

The GL518SM possesses a voltage sensor, a temperature sensor and two fan speed sensors.

## SEE ALSO

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

## HISTORY

The **glenv** driver first appeared in OpenBSD 3.9.

## AUTHORS

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