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update README and RELEASE-NOTES

Signed-off-by: Kay Sievers <kay.sievers@suse.de>
This commit is contained in:
Kay Sievers 2005-11-16 05:22:31 +01:00
parent d7363ee14c
commit c249f66a70
3 changed files with 68 additions and 34 deletions

89
README
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@ -4,65 +4,92 @@ For more information see the files in the docs/ directory.
Important Note:
Integrating udev in the system is a whole lot of work, has complex dependencies
and differs a lot from distro to distro. All reasonable distros use udev these
days, the major ones make it mandatory and the system will not work without it.
and differs a lot from distro to distro. All reasonable distros depend on udev
these days and the system will not work without it.
The upstream udev project does not support or recomend to replace a distro's udev
installation with the upstream version. The installation of a unmodified upstream
version may render your system unusable! There is no "default" setup or a set
of "default" rules provided by the upstream udev version.
udev requires:
- 2.6 version of the Linux kernel
Requirements:
- 2.6 version of the Linux kernel.
- the kernel must have sysfs, netlink, and hotplug enabled
- The kernel must have sysfs, netlink, and hotplug enabled.
- proc must be mounted on /proc
- The proc filesystem must be mounted on /proc.
- sysfs must be mounted at /sys, no other location is supported
- The sysfs filesystem must be mounted at /sys. No other location
is supported.
- udev creates and removes device nodes in /dev based on events
Operation:
- Udev creates and removes device nodes in /dev based on events
the kernel sends out on device discovery or removal
- during bootup /dev usually gets a tmpfs mounted which is populated scratch
by udev (created nodes don't survive a reboot, it always starts from scratch)
- Directly after mounting the root filesystem, the udevd daemon must be
started by an init script.
- udev replaces the hotplug event management invoked from /sbin/hotplug
by the udevd daemon, which receives the kernel events over netlink
- From kernel version 2.6.15 on, the hotplug helper /sbin/hotplug should
be disabled with an init script before kernel modules are loaded.
- all kernel events are matched against a set of specified rules which
make it posible to hook into the event processing
- During bootup, /dev usually gets a tmpfs filesystem mounted which is
populated from scratch by udev (created nodes don't survive a reboot,
the /lib/udev/devices directory should be used for "static nodes").
- there is a copy of the rules files for all major distros in the etc/udev
directory (you may look there how others distros are doing it)
- Udev replaces the hotplug event management invoked from /sbin/hotplug
by the udevd daemon, which receives the kernel events over netlink.
Setting which are used for building udev:
- All kernel events are matched against a set of specified rules which
make it possible to hook into the event processing.
- Copies of the rules files for all major distros are in the etc/udev
directory (you may look there how others distros are doing it).
Compile Options:
prefix
set this to the default root that you want to use
Only override this if you really know what you are doing
Set this to the default root that you want to use only override
this if you really know what you are doing even then, you probably
don't do the right thing.
DESTDIR
prefix for install target for package building
Prefix for install target, used for package building.
USE_LOG
if set to 'true', udev will emit messages to the syslog when
it creates or removes device nodes. This is helpful to see
what udev is doing. This is enabled by default.
if set to 'true', udev is able to pass errors or debug information
to syslog. This is very useful to see what udev is doing or not doing,
it is enabled by default.
DEBUG
if set to 'true', verbose debugging messages will be compiled into
the udev binaries. Default value is 'false'.
If set to 'true', very verbose debugging messages will be compiled
into the udev binaries. The actual level of debugging is specified
in the udev config file.
STRIPCMD
If udev is compiled for packaging an empty string can be passed
to disable the stripping of the binaries.
USE_SELINUX
if set to 'true', udev will be built with SELinux support
If set to 'true', udev will be built with SELinux support
enabled. This is disabled by default.
USE_KLIBC
if set to 'true', udev is built and linked against klibc.
If set to 'true', udev is built and linked against klibc.
Default value is 'false'. KLCC specifies the klibc compiler
wrapper, usually in /usr/bin/klcc
wrapper, usually located at /usr/bin/klcc.
EXTRAS
if set, will build the "extra" helper programs as specified
as listed (see below for an example.)
If set, will build the "extra" helper programs as specified
as listed (see below for an example).
if you want to build the udev helper program cdrom_id and scsi_id:
If you want to build the udev helper program cdrom_id and scsi_id:
make EXTRAS="extras/cdrom_id extras/scsi_id"
Installation:
- The install target intall the udev binaries in the default locations,
all at boot time reqired binaries will be installed in /sbin.
- The default location for scripts and binaries that are called from
rules is /lib/udev.
- It is recommended to use the /lib/udev/devices directory to place
device nodes and symlinks in, which are copied to /dev at every boot.
That way, nodes for broken subsystems or devices which can't be
detected automatically by the kernel will always be available.
Please direct any comment/question/concern to the linux-hotplug-devel mailing list at:
linux-hotplug-devel@lists.sourceforge.net

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@ -11,6 +11,13 @@ The option "udev_db" does no longer exist. All udev state will always
be in /$udev_root/.udev/ now, there is no longer an option to set this
to anything else.
Default location for rule sripts and helper programs is now: /lib/udev/.
Everything that is not useful on the commandline should go into this
directory. Also /lib/udev/devices/ is recommended as a directory where
packages or the user can place real device nodes, which get copied over
to /dev at every boot. This should replace the various solutions with
custom config files.
udev 075
========
Silent a too verbose error logging for the old hotplug.d/ dev.d/

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@ -1,13 +1,13 @@
# udev.conf
# Where in the filesystem to place the device nodes
# Where in the filesystem to place the device nodes.
udev_root="@udevdir@"
# The name and location of the udev rules file(s).
udev_rules="@configdir@/rules.d"
# The initial syslog(3) priority: "err", "info", "debug" or its
# numerical equivalent. For runtime debugging, change the daemons
# internal state with: "udevcontrol log_priority=<value>".
# numerical equivalent. For runtime debugging, the daemons internal
# state can be changed with: "udevcontrol log_priority=<value>".
udev_log="err"