Messages in this thread | | | Date | Thu, 11 Dec 2003 23:43:36 -0500 | From | Bob <> | Subject | Re: udev for dummies |
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David T Hollis wrote:
>On Thu, 2003-12-11 at 17:16, J.A. Magallon wrote: > > >>Hi all... >> >>I am starting to use 2.6, and I really would like to use udev. >>But I can't find a doc about how to move from taditional heavily >>populated /dev to new method. >> >>Any pointer ? >> Do you may mean heavily **over-populated** /dev? Learning more about devfs would make it easier to transition to udev. I'm going through this now for myself.
You could learn how to strip out non-existent devices from /dev by using /etc/devfs/compat_symlinks by using regular expressions there to make symlinks for standard device names like udev uses but only permit devfsd to make device entries for devices you have on your system.
Here is my /etc/devfs/compat_symlinks. At the top I don't use anything but devfs naming, then at the bottom I add a few symlinks both to limit naming to real devices(see md*) and to make conventional sd* hd* to make transition to udev simpler.
-Bob
# Enable full compatibility mode for old device names. You may comment these # out if you don't use the old device names. Make sure you know what you're # doing! #########REGISTER .* MKOLDCOMPAT UNREGISTER .* RMOLDCOMPAT
# You may comment out the above and uncomment the following if you've # configured your system to use the original "new" devfs names or the really # new names #####REGISTER ^vc/.* MKOLDCOMPAT UNREGISTER ^vc/.* RMOLDCOMPAT #####REGISTER ^pty/m0 MKOLDCOMPAT ######REGISTER ^pty/s0 MKOLDCOMPAT UNREGISTER ^pty/.* RMOLDCOMPAT ######REGISTER ^misc MKOLDCOMPAT UNREGISTER ^misc RMOLDCOMPAT
# You may comment these out if you don't use the original "new" names ######REGISTER .* MKNEWCOMPAT UNREGISTER .* RMNEWCOMPAT
# Create compatibility links for broken USB serial driver REGISTER ^usb/tts/([0-9]+) CFUNCTION GLOBAL symlink $devname ttyUSB\1 #######UNREGISTER ^usb/tts/([0-9]+) CFUNCTION GLOBAL unlink ttyUSB\1
# Create compatibility link for broken misc/net/tun driver (must uncomment the # MKOLDCOMPAT for misc above if you want to use this) ######REGISTER ^misc/net/tun$ CFUNCTION GLOBAL unlink net/tun ######REGISTER ^misc/net/tun$ CFUNCTION GLOBAL symlink /dev/$devname net/tun
# Bob removes non-existent /dev/md's, adds old conventional devices # to aid transition to udev as this percolates through /etc/init.d # scripts for fsck and mount-- REGISTER ^md/[0-4] MKOLDCOMPAT UNREGISTER ^md/[5-9][0-9]* RMOLDCOMPAT REGISTER ^ide/host[0-2]/.* MKOLDCOMPAT REGISTER ^scsi/host[0-2]/bus0/target[0-3]/.* MKOLDCOMPAT REGISTER ^snd/.* MKOLDCOMPAT REGISTER ^sound/.* MKOLDCOMPAT REGISTER ^misc/rtc MKOLDCOMPAT
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