Get reads a VPD variable by name and returns its value as a sequence of bytes.

GetAll reads all the VPD variables and returns a map contaiing each name:value couple.

Set sets a VPD variable with `key` as name and `value` as its byte-stream value.

VpdDir points to the base directory where the VPD sysfs interface is located.

VpdDir points to the base directory where the VPD sysfs interface is located.