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1da177e4 LT |
1 | The DVB subsystem currently registers to the sysfs subsystem using the |
2 | "class_simple" interface. | |
3 | ||
f65e51d7 | 4 | This means that only the basic information like module loading parameters |
1da177e4 LT |
5 | are presented through sysfs. Other things that might be interesting are |
6 | currently *not* available. | |
7 | ||
8 | Nevertheless it's now possible to add proper udev rules so that the | |
9 | DVB device nodes are created automatically. | |
10 | ||
11 | We assume that you have udev already up and running and that have been | |
12 | creating the DVB device nodes manually up to now due to the missing sysfs | |
13 | support. | |
14 | ||
15 | 0. Don't forget to disable your current method of creating the | |
16 | device nodes manually. | |
17 | ||
18 | 1. Unfortunately, you'll need a helper script to transform the kernel | |
19 | sysfs device name into the well known dvb adapter / device naming scheme. | |
20 | The script should be called "dvb.sh" and should be placed into a script | |
21 | dir where udev can execute it, most likely /etc/udev/scripts/ | |
22 | ||
23 | So, create a new file /etc/udev/scripts/dvb.sh and add the following: | |
24 | ------------------------------schnipp------------------------------------------------ | |
25 | #!/bin/sh | |
26 | /bin/echo $1 | /bin/sed -e 's,dvb\([0-9]\)\.\([^0-9]*\)\([0-9]\),dvb/adapter\1/\2\3,' | |
27 | ------------------------------schnipp------------------------------------------------ | |
28 | ||
29 | Don't forget to make the script executable with "chmod". | |
30 | ||
31 | 1. You need to create a proper udev rule that will create the device nodes | |
32 | like you know them. All real distributions out there scan the /etc/udev/rules.d | |
33 | directory for rule files. The main udev configuration file /etc/udev/udev.conf | |
34 | will tell you the directory where the rules are, most likely it's /etc/udev/rules.d/ | |
35 | ||
36 | Create a new rule file in that directory called "dvb.rule" and add the following line: | |
37 | ------------------------------schnipp------------------------------------------------ | |
38 | KERNEL="dvb*", PROGRAM="/etc/udev/scripts/dvb.sh %k", NAME="%c" | |
39 | ------------------------------schnipp------------------------------------------------ | |
40 | ||
41 | If you want more control over the device nodes (for example a special group membership) | |
42 | have a look at "man udev". | |
43 | ||
44 | For every device that registers to the sysfs subsystem with a "dvb" prefix, | |
45 | the helper script /etc/udev/scripts/dvb.sh is invoked, which will then | |
46 | create the proper device node in your /dev/ directory. |