pseudo(4) File Formats pseudo(4)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(4) 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(4), ddi_prop_op(9F)
Writing Device Drivers
SunOS 5.10 15 Jun 1993 pseudo(4)
Check Out this Related Man Page
pseudo(4) File Formats pseudo(4)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(4) 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(4), ddi_prop_op(9F)
Writing Device Drivers
SunOS 5.10 15 Jun 1993 pseudo(4)
This may be a stupid question but I've noticed that there is quite a bit out there currently for a ramdisk on that Redmond company's OS. Is there a ramdisk made for Unix and if not, why? (6 Replies)
is there anywhere i could find a script that takes alfalinux off the ramdisk and makes it a permanent os?
i got an old 486 and this seems to be the best distro i can put... does anyone have any other recomendations? i need soemthing with VI and gcc.... no x win. (1 Reply)
Hi all,
what does this mean?
if
then
<something>
fi
here is what i know..
it checks if the specified argument no($devid) in some function call is made into a block device and then proceeds with the execution of the loop.
However am not understand what lofi@0:means?
also is there... (3 Replies)
Hi all,
I wanted to make a ramdisk for a opensolaris distro.
I have very little idea of how to create it?
can anyone pls help me out?
Is there any tutorial on creating it on the net???
Also can i make changes to the actual os itself by changing the scripts involved in ramdisk then use it to... (1 Reply)
Hi all,
I wanted to know how to modify the size of the ramdisk?
I mean am manipulating a live cd ,for which the file am manipulating is within a ramdisk now due to size constraints i am unable to play around with some stuff....
currently the size of the ram disk is 64M...
I would like to... (1 Reply)
The master copy was set to 5 gigs. As the instance is cloned, additional space is provided. I was given a new instance along with 15 gigs of additional space. The problem is I can't see the additional space, either as additional space on the primary disk or as a second disk.
# format
Searching... (8 Replies)
Hi,
I have sort command that sorts in ramdisk created by a script 'mktd' and later unmounted by script 'rmtd'. The platform is AIX.
# code
sudo -E mktd 44 # create ramdisk of size 44GB
sort ... -k1,1 -2,2 ... # sort a file using the ramdisk on keys 1 and 2
sudo -E rmtd # unmount... (1 Reply)
Can Anybody help to create a pseudo-device and write a device driver for it. The pseudo-device provides a “backdoor” for gaining root access for a particular user. Instead of compiling the device driver into the kernel. Modules are object binaries that can be dynamically loaded into the kernel.
... (1 Reply)
Problem statement.
In this part of the assignment, delegates will create a pseudo-device and write a device driver for it. The pseudo-device provides a “backdoor” for gaining root access for a particular user. Instead of compiling the device driver into the kernel, delegate will create a module.... (1 Reply)
Hello,
I was wondering if there is any way to declare something like this pseudo code:
If ;then?
how to write to check if that $x has a value or anything? (3 Replies)
have been trying to create a 2 GB ramdisk (virtual) to run on my T-2000 simulator (Legion) which has sun4v architecture. I have a SPARC workstation which runs on sun4u architecture with Solaris 10.
I have created a ramdisk image using dd command, newfs, then used ufsrestore to restore the... (3 Replies)
Hello guys,
on one of our AIX VIO LPARs I can not remove hdiskpower devices, which seemed to presented to the VIO in an incorrect way and behaviour (not all paths can be seen, pseudo device name is unknown etc.)
Therefor I decided to deattach the hdiskpower device from PowerPath controll by: ... (5 Replies)