Cross-Compiled Linux From Scratch - Version 1.2.0-x86

Chapter 10. Installing Basic System Software

10.61. Udev-168

The Udev package contains programs for dynamic creation of device nodes.

10.61.1. Installation of Udev

Prepare Udev for compilation: 

./configure --prefix=/usr \
  --exec-prefix="" --sysconfdir=/etc \
  --libexecdir=/lib/udev --libdir=/usr/lib \
  --disable-extras --disable-introspection

Compile the package: 

make

Install the package: 

make install

Create a directory for storing firmware that can be loaded by udev: 

install -dv /lib/firmware

10.61.2. Contents of Udev

Installed programs: ata_id, cdrom_id, collect, create_floppy_devices, edd_id, firmware.sh, fstab_import, path_id, scsi_id, udevadm, udevd, usb_id, v4l_id, write_cd_rules, write_net_rules
Installed library: libudev
Installed directories: /etc/udev, /lib/firmware, /lib/udev, /usr/share/doc/udev

Short Descriptions

udevadm

Controls the runtime behavior of Udev, requests kernel events, manages the event queue, and provides simple debugging.

udevd

A daemon that reorders hotplug events before submitting them to udev, thus avoiding various race conditions

ata_id

Provides Udev with a unique string and additional information (uuid, label) for an ATA drive

cdrom_id

Prints the capabilities of a CDROM or DVDROM drive.

collect

DESCRIPTION REQUIRED

create_floppy_devices

Creates all possible floppy devices based on the CMOS type

edd_id

Identifies x86 disk drives from Enhanced Disk Drive calls

firmware.sh

Script to load firmware for a device

fstab_import

DESCRIPTION REQUIRED

path_id

Provides the shortest possible unique hardware path to a device

scsi_id

Retrieves or generates a unique SCSI identifier.

usb_id

Identifies a USB block device.

v4l_id

DESCRIPTION REQUIRED

write_cd_rules

DESCRIPTION REQUIRED

write_net_rules

DESCRIPTION REQUIRED

libudev

DESCRIPTION REQUIRED

/etc/udev

Contains udev configuration files, device permissions, and rules for device naming

/lib/udev

Contains udev helper programs and static devices which get copied to /dev when booted.