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| -rw-r--r-- | HOWTO-udev_for_dev | 73 |
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diff --git a/HOWTO-udev_for_dev b/HOWTO-udev_for_dev new file mode 100644 index 0000000000..75a858f22a --- /dev/null +++ b/HOWTO-udev_for_dev @@ -0,0 +1,73 @@ +HOWTO use udev to manage /dev + + This document describes one way to get udev working on a Fedora-development + machine to manage /dev. This procedure may be used to get udev to manage + /dev on other distros, if you modify some of the steps. + + This will only work if you use a 2.6 based kernel, preferably the most + recent one. This does not prevent your machine from using a 2.4 + kernel, if you boot into one, udev will not run and your old /dev will + be present with no changes needed. + + +NOTE NOTE NOTE NOTE NOTE NOTE NOTE + This is completely unsupported. Attempting to do this may cause your + machine to be unable to boot properly. USE AT YOUR OWN RISK. Always + have a rescue disk or CD handy to allow you to fix up any errors that + may occur. +NOTE NOTE NOTE NOTE NOTE NOTE NOTE + + + - Build and install udev as specified in the README that comes with + udev. I recommend using the following build options to get the + smallest possible binaries: + make USE_KLIBC=true USE_LOG=false DEBUG=false + + - disable udev from the boot process by running: + chkconfig udev off + or + chkconfig --del udev + as root. + + - place the start_udev script somewhere that is accessible by your + initscripts. I placed it into /etc/rc.d with the following command: + copy extras/start_udev /etc/rc.d/ + + - modify the rc.sysinit script to call the start_udev script as one of + the first things that it does, but after /proc and /sys are mounted. + I did this with the latest Fedora startup scripts with the patch at + the end of this file. + + - reboot into a 2.6 kernel and watch udev create all of the initial + device nodes in /dev + + +If anyone has any problems with this, please let me, and the +linux-hotplug-devel@lists.sourceforge.net mailing list know. + +A big thanks go out to the Gentoo developers for showing me that this is +possible to do. + +Greg Kroah-Hartman +<greg@kroah.com> + + +---------------------------------- +Patch to modify rc.sysinit to call udev at the beginning of the boot +process: + + +--- /etc/rc.sysinit.orig 2004-02-17 11:45:17.000000000 -0800 ++++ /etc/rc.sysinit 2004-02-17 13:28:33.000000000 -0800 +@@ -32,6 +32,9 @@ + + . /etc/init.d/functions + ++# start udev to populate /dev ++/etc/rc.d/start_udev ++ + if [ "$HOSTTYPE" != "s390" -a "$HOSTTYPE" != "s390x" ]; then + last=0 + for i in `LC_ALL=C grep '^[0-9].*respawn:/sbin/mingetty' /etc/inittab | sed 's/^.* tty\([0-9][0-9]*\).*/\1/g'`; do + + |