PSEUDO(5) Standards, Environments, and Macros PSEUDO(5)
NAME
pseudo - configuration files for pseudo device drivers
DESCRIPTION
Pseudo devices are devices that are implemented entirely in software.
Drivers for pseudo devices must provide driver configuration files to
inform the system of each pseudo device that should be created.
Configuration files for pseudo device drivers must identify the parent
driver explicitly as
pseudo, and must create an integer property called
instance which is unique to this entry in the configuration file.
Each entry in the configuration file creates a prototype devinfo node.
Each node is assigned an instance number which is determined by the value
of the
instance property. This property is only applicable to children of
the
pseudo parent, and is required since pseudo devices have no hardware
address from which to determine the instance number. See
driver.conf(5) for further details of configuration file syntax.
EXAMPLES
Example 1: A sample configuration file.
Here is a configuration file called
ramdisk.conf for a pseudo device
driver that implements a RAM disk. This file creates two nodes called
"ramdisk". The first entry creates ramdisk node instance 0, and the
second creates ramdisk node, instance 1, with the additional
disk-size property set to
512. # # Copyright (c) 1993, by Sun Microsystems, Inc. # #ident "@(#)ramdisk.conf 1.3 93/06/04 SMI" name="ramdisk" parent="pseudo" instance=0; name="ramdisk" parent="pseudo" instance=1 disk-size=512;SEE ALSO
driver.conf(5),
ddi_prop_op(9F) Writing Device Drivers June 15, 1993
PSEUDO(5)