ofctl —
display the OpenPROM or OpenFirmware device tree
  
    | ofctl | [ -lpv] [-ffile] [-rpropfile] [-wpropfile] [node] | 
ofctl provides an interface for displaying the OpenPROM
  or OpenFirmware device tree and node properties. The
  ofctl program is only installed on supported
  platforms.
Without any arguments, ofctl will dump the
    full tree. When given the name of a specific node,
    ofctl will display that node and its child
  nodes.
The options are as follows:
  - -ffile
- On systems with OpenPROM, use file instead of the
      default /dev/openprom. On systems with
      OpenFirmware, use file instead of the default
      /dev/openfirm.
- -l
- Dump a partial tree starting from node.
- -p
- Display each node's properties.
- -rpropfile
- Instead of reading from the openprom or openfirm device, use the proplib
      file propfile as input. See also
      -w.
- -v
- Display the full path name for each node.
- -wpropfile
- Write the device tree to the proplib file propfile.
      See also -r.
 
  - /dev/openprom
- The openprom device on systems with OpenPROM.
- /dev/openfirm
- The openfirm device on systems with OpenFirmware.