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Commit 70e8d3e9 authored by Mauro Carvalho Chehab's avatar Mauro Carvalho Chehab
Browse files

[media] doc-rst: convert udev chapter to rst 



This chapter is outdated. I almost removed, but, as we're lacking
documentation about how to make DVB devices persistent, I opted,
instead, to keep it, and add a note about that.

Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
parent d91b11bf

Documentation/media/dvb-drivers/index.rst

+1 −0
Original line number Diff line number Diff line
@@ -29,4 +29,5 @@ License". 
	opera-firmware

	technisat

	ttusb-dec

	udev

	contributors

Documentation/media/dvb-drivers/udev.rst

+23 −8
Original line number Diff line number Diff line 
UDEV rules for DVB

==================



.. note::



   #) This documentation is outdated. Udev on modern distributions auto-detect

      the DVB devices.



   #) **TODO:** change this document to explain how to make DVB devices

      persistent, as, when a machine has multiple devices, they may be detected

      on different orders, which could cause apps that relies on the device

      numbers to fail.



The DVB subsystem currently registers to the sysfs subsystem using the

"class_simple" interface.



This means that only the basic information like module loading parameters

are presented through sysfs. Other things that might be interesting are

currently *not* available.

currently **not** available.



Nevertheless it's now possible to add proper udev rules so that the

DVB device nodes are created automatically.
@@ -21,10 +34,11 @@ The script should be called "dvb.sh" and should be placed into a script 
dir where udev can execute it, most likely /etc/udev/scripts/



So, create a new file /etc/udev/scripts/dvb.sh and add the following:

------------------------------schnipp------------------------------------------------



.. code-block:: none



	#!/bin/sh

	/bin/echo $1 | /bin/sed -e 's,dvb\([0-9]\)\.\([^0-9]*\)\([0-9]\),dvb/adapter\1/\2\3,'

------------------------------schnipp------------------------------------------------



Don't forget to make the script executable with "chmod".
@@ -34,9 +48,10 @@ directory for rule files. The main udev configuration file /etc/udev/udev.conf 
will tell you the directory where the rules are, most likely it's /etc/udev/rules.d/



Create a new rule file in that directory called "dvb.rule" and add the following line:

------------------------------schnipp------------------------------------------------



.. code-block:: none



	KERNEL="dvb*", PROGRAM="/etc/udev/scripts/dvb.sh %k", NAME="%c"

------------------------------schnipp------------------------------------------------



If you want more control over the device nodes (for example a special group membership)

have a look at "man udev".