=== CPU Usage
-Gets the percentual CPU usage from +/proc/stat+.
+Gets the percentual CPU usage from +/proc/stat+ (Linux) or +sysctl(3)+ (FreeBSD/OpenBSD).
*Example order*: +cpu_usage+
Outputs the volume of the specified mixer on the specified device. Works only
on Linux because it uses ALSA.
+A simplified configuration can be used on FreeBSD and OpenBSD due to
+the lack of ALSA, the +device+, +mixer+ and +mixder_idx+ options can be
+ignored on these systems. On these systems the OSS API is used instead to
+query +/dev/mixer+ directly.
*Example order*: +volume master+