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ofctl(8) [netbsd man page]

OFCTL(8)						    BSD System Manager's Manual 						  OFCTL(8)

NAME
ofctl -- display the OpenPROM or OpenFirmware device tree SYNOPSIS
ofctl [-p] [-f file] [node] DESCRIPTION
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: -f file On systems with OpenPROM, use file instead of the default /dev/openprom. On systems with OpenFirmware, use file instead of the default /dev/openfirm. -p Display each node's properties. FILES
/dev/openprom The openprom device on systems with OpenPROM. /dev/openfirm The openfirm device on systems with OpenFirmware. SEE ALSO
eeprom(8) BSD
September 29, 2006 BSD

Check Out this Related Man Page

NG_DEVICE(4)						   BSD Kernel Interfaces Manual 					      NG_DEVICE(4)

NAME
ng_device -- device netgraph node type SYNOPSIS
#include <netgraph/ng_device.h> DESCRIPTION
A device node is both a netgraph node and a system device interface. When a device node is created, a new device entry appears which is accessible via the regular file operators such as open(2), close(2), read(2), write(2), etc. The first node is created as /dev/ngd0, all subsequent nodes /dev/ngd1, /dev/ngd2, etc. HOOKS
A device node has a single hook with an arbitrary name. All data coming in over the hook will be presented to the device for read(2). All data coming in from the device entry by write(2) will be forwarded to the hook. CONTROL MESSAGES
The device node supports one non-generic control message: NGM_DEVICE_GET_DEVNAME Returns device name corresponding to a node. SHUTDOWN
This node shuts down upon receipt of a NGM_SHUTDOWN control message, or upon hook disconnection. The associated device entry is removed and becomes available for use by future device nodes. SEE ALSO
netgraph(4), ngctl(8) HISTORY
The device node type was first implemented in FreeBSD 5.0. AUTHORS
Mark Santcroos <marks@ripe.net> Gleb Smirnoff <glebius@FreeBSD.org> BSD
October 19, 2004 BSD
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