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authorgreg@kroah.com <greg@kroah.com>2004-02-18 23:54:01 -0800
committerGreg KH <gregkh@suse.de>2005-04-26 21:32:29 -0700
commitde46ad1952a40911eeea9fd941f578b6dacc1cec (patch)
tree2f250c5c4fea7619f542a78d446770cdc2281a64 /HOWTO-udev_for_dev
parentb07ed5a7dcfc6d8b5eb98f97592267a6f35de820 (diff)
[PATCH] add HOWTO detailing how to use udev to manage /dev
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diff --git a/HOWTO-udev_for_dev b/HOWTO-udev_for_dev
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+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
+
+