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- 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.
- Nevertheless it's now possible to add proper udev rules so that the
- DVB device nodes are created automatically.
- We assume that you have udev already up and running and that have been
- creating the DVB device nodes manually up to now due to the missing sysfs
- support.
- 0. Don't forget to disable your current method of creating the
- device nodes manually.
- 1. Unfortunately, you'll need a helper script to transform the kernel
- sysfs device name into the well known dvb adapter / device naming scheme.
- 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------------------------------------------------
- #!/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".
- 1. You need to create a proper udev rule that will create the device nodes
- like you know them. All real distributions out there scan the /etc/udev/rules.d
- 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------------------------------------------------
- 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".
- For every device that registers to the sysfs subsystem with a "dvb" prefix,
- the helper script /etc/udev/scripts/dvb.sh is invoked, which will then
- create the proper device node in your /dev/ directory.
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