1pseudo(4) File Formats pseudo(4)
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6 pseudo - configuration files for pseudo device drivers
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9 Pseudo devices are devices that are implemented entirely in software.
10 Drivers for pseudo devices must provide driver configuration files to
11 inform the system of each pseudo device that should be created.
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14 Configuration files for pseudo device drivers must identify the parent
15 driver explicitly as pseudo, and must create an integer property called
16 instance which is unique to this entry in the configuration file.
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19 Each entry in the configuration file creates a prototype devinfo node.
20 Each node is assigned an instance number which is determined by the
21 value of the instance property. This property is only applicable to
22 children of the pseudo parent, and is required since pseudo devices
23 have no hardware address from which to determine the instance number.
24 See driver.conf(4) for further details of configuration file syntax.
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27 Example 1 A sample configuration file.
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30 Here is a configuration file called ramdisk.conf for a pseudo device
31 driver that implements a RAM disk. This file creates two nodes called
32 "ramdisk". The first entry creates ramdisk node instance 0, and the
33 second creates ramdisk node, instance 1, with the additional disk-size
34 property set to 512.
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37 #
38 # Copyright (c) 1993, by Sun Microsystems, Inc.
39 #
40 #ident "@(#)ramdisk.conf 1.3 93/06/04 SMI"
41 name="ramdisk" parent="pseudo" instance=0;
42 name="ramdisk" parent="pseudo" instance=1 disk-size=512;
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47 driver.conf(4), ddi_prop_op(9F)
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50 Writing Device Drivers
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54SunOS 5.11 15 Jun 1993 pseudo(4)