| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | The DVB subsystem currently registers to the sysfs subsystem using the |
| 2 | "class_simple" interface. |
| 3 | |
| 4 | This means that only the basic informations like module loading parameters |
| 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. |