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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /Documentation/dvb/udev.txt | |
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Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'Documentation/dvb/udev.txt')
-rw-r--r-- | Documentation/dvb/udev.txt | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/Documentation/dvb/udev.txt b/Documentation/dvb/udev.txt new file mode 100644 index 000000000000..68ee224b6aae --- /dev/null +++ b/Documentation/dvb/udev.txt @@ -0,0 +1,46 @@ +The DVB subsystem currently registers to the sysfs subsystem using the +"class_simple" interface. + +This means that only the basic informations 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. |