%general-entities; ]> Udev The udev-config tarball contains LFS-specific files used to configure Udev. Unpack it into the Udev source directory: tar -xvf ../&udev-config;.tar.bz2 Create some devices and directories that Udev cannot handle due to them being required very early in the boot process: install -dv /lib/{firmware,udev/devices/{pts,shm}} mknod -m0666 /lib/udev/devices/null c 1 3 ln -sv /proc/self/fd /lib/udev/devices/fd ln -sv /proc/self/fd/0 /lib/udev/devices/stdin ln -sv /proc/self/fd/1 /lib/udev/devices/stdout ln -sv /proc/self/fd/2 /lib/udev/devices/stderr ln -sv /proc/kcore /lib/udev/devices/core Compile the package: make EXTRAS="extras/ata_id extras/cdrom_id extras/edd_id \ extras/firmware extras/floppy extras/path_id extras/rule_generator \ extras/scsi_id extras/usb_id extras/volume_id" EXTRAS=... This builds several helper binaries that can aid in writing custom Udev rules. To test the results, issue: make test. Note that the Udev testsuite will produce numerous messages in the host system's logs. These are harmless and can be ignored. Install the package: make DESTDIR=/ \ EXTRAS="extras/ata_id extras/cdrom_id extras/edd_id \ extras/firmware extras/floppy extras/path_id extras/rule_generator \ extras/scsi_id extras/usb_id extras/volume_id" install DESTDIR=/ This prevents the Udev build process from killing any udevd processes that may be running on the host system. Udev has to be configured in order to work properly, as it does not install any configuration files by default. First install the commonly-used rules files provided by Udev: cp -v etc/udev/rules.d/[0-9]* /etc/udev/rules.d/ Now install the LFS-specific rules files: cd &udev-config; make install Install the documentation that explains the LFS-specific rules files: make install-doc Install the documentation that explains the commonly-used rules files provided by Udev: make install-extra-doc Install the documentation that explains how to create custom Udev rules: cd .. install -m644 -D -v docs/writing_udev_rules/index.html \ /usr/share/doc/udev-&udev-version;/index.html Installed programs Installed directory ata_id, cdrom_id, create_floppy_devices, edd_id, firmware_helper, path_id, scsi_id, udevcontrol, udevd, udevinfo, udevmonitor, udevsettle, udevtest, udevtrigger, usb_id, vol_id, and write_cd_aliases /etc/udev Short Descriptions ata_id Provides Udev with a unique string and additional information (uuid, label) for an ATA drive ata_id cdrom_id Provides Udev with the capabilities of a CD-ROM or DVD-ROM drive cdrom_id create_floppy_devices Creates all possible floppy devices based on the CMOS type create_floppy_devices edd_id Provides Udev with the EDD ID for a BIOS disk drive edd_id firmware_helper Uploads firmware to devices firmware_helper path_id Provide the shortest possible unique hardware path to a device path_id scsi_id Provides Udev with a unique SCSI identifier based on the data returned from sending a SCSI INQUIRY command to the specified device scsi_id udevcontrol Configures a number of options for the running udevd daemon, such as the log level. udevcontrol udevd A daemon that listens for uevents on the netlink socket, creates devices and runs the configured external programs in response to these uevents udevd udevinfo Allows users to query the Udev database for information on any device currently present on the system; it also provides a way to query any device in the sysfs tree to help create udev rules udevinfo udevmonitor Prints the event received from the kernel and the environment which Udev sends out after rule processing udevmonitor udevsettle Watches the Udev event queue and exits if all current uevents have been handled udevsettle udevtest Simulates a uevent for the given device, and prints out the name of the node the real udevd would have created, or the name of the renamed network interface udevtest udevtrigger Triggers kernel device uevents to be replayed udevtrigger usb_id Provides Udev with information about USB devices usb_id vol_id Provides Udev with the label and uuid of a filesystem vol_id /etc/udev Contains Udev configuation files, device permissions, and rules for device naming /etc/udev