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100 lines
3.6 KiB
Plaintext
100 lines
3.6 KiB
Plaintext
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udev - a userspace implementation of devfs
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For more information on the design, and structure of this project, see the
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files in the docs/ directory.
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To use:
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- You must be running a 2.6 version of the Linux kernel.
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- Your 2.6 kernel must have had CONFIG_HOTPLUG enabled when it was built.
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- Make sure sysfs is mounted. udev will figure out where sysfs is mounted, but
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the traditional place for it is at /sys. You can mount it by hand by running:
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mount -t sysfs none /sys
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- Make sure you have the latest version of the linux-hotplug scripts. They are
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available at linux-hotplug.sf.net or from your local kernel.org mirror at:
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kernel.org/pub/linux/utils/kernel/hotplug/
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They are required in order for udev to work properly.
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If for some reason you do not install the hotplug scripts, you must tell the
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kernel to point the hotplug binary at wherever you install udev at. This can
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be done by:
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echo "/sbin/udev" > /proc/sys/kernel/hotplug
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- Build the project:
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make
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Note:
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There are a number of different flags that you can use when building
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udev. They are as follows:
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prefix
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set this to the default root that you want udev to be
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installed into. This works just like the 'configure --prefix'
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script does. Default value is ''. Only override this if you
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really know what you are doing.
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USE_KLIBC
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if set to 'true', udev is built and linked against the
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included version of klibc. Default value is 'false'.
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USE_LOG
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if set to 'true', udev will emit messages to the syslog when
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it creates or removes device nodes. This is helpful to see
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what udev is doing. This is enabled by default. Note, if you
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are building udev against klibc it is recommended that you
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disable this option (due to klibc's syslog implementation.)
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USE_DBUS
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if set to 'true', DBUS messages will be sent everytime udev
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creates or removes a device node. This requires that DBUS
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development headers and libraries be present on your system to
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build properly. Default value is 'false'.
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DEBUG
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if set to 'true', debugging messages will be sent to the syslog
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as udev is run. Default value is 'false'.
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KERNEL_DIR
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If this is not set it will default to /lib/modules/`uname -r`/build
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This is used if USE_KLIBC=true to find the kernel include
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directory that klibc needs to build against. This must be set
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if you are not building udev while running a 2.6 kernel.
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So, if you want to build udev using klibc with debugging messages, you
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would do:
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make USE_KLIBC=true DEBUG=true
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- Install the project:
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make install
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This will put the udev binary in /sbin, create the /udev and /etc/udev
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directories, and place the udev configuration files in /etc/udev. You
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will probably want to edit the namedev.* files to create custom naming
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rules. More info on how the config files are set up are contained in
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comments in the files, and is located in the documentation.
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- Add and remove devices from the system and marvel as nodes are created
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and removed in /udev/ based on the device types.
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- If you later get sick of it, uninstall it:
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make uninstall
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Things are still quite rough, but it should work properly. If nothing
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seems to happen, make sure your build worked properly by running the
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udev-test.pl script as root in the test/ subdirectory of the udev source
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tree.
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Development and documentation help is very much appreciated, see the TODO
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file for a list of things left to be done.
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Any comment/questions/concerns please let me and the other udev developers
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know by sending a message to the linux-hotplug-devel mailing list at:
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linux-hotplug-devel@lists.sourceforge.net
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greg k-h
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greg@kroah.com
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