these group names with only the rootfs mounted and while no network is
available.
- - The 'udev extras' has the following dependencies:
+ - Some udev extras have external dependencies like:
libacl, libglib2, libusb, usbutils, pciutils, and gperf.
- These dependencies can be disabled with the --disable-extras configure option.
+ All these extras can be disabled with configure options.
Setup:
- At bootup, the /dev directory should get the 'devtmpfs' filesystem
- The udev daemon should be started to handle device events sent by the kernel.
During bootup, the kernel can be asked to send events for all already existing
- devices, to apply the configuration to these devices. This is usually done by:
+ devices so that they too can be configured by udev. This is usually done by:
/sbin/udevadm trigger --type=subsystems
/sbin/udevadm trigger --type=devices
- - Restarting the daemon does never apply any rules to existing devices.
+ - Restarting the daemon never applies any rules to existing devices.
- New/changed rule files are picked up automatically; there is no daemon
restart or signal needed.
Operation:
- - Udev creates/removes device nodes in /dev, based on events the kernel
- sends out on device creation/removal.
+ - Based on events the kernel sends out on device creation/removal, udev
+ creates/removes device nodes in the /dev directory.
- All kernel events are matched against a set of specified rules, which
possibly hook into the event processing and load required kernel
- modules to setup devices. For all devices the kernel exports a major/minor
+ modules to set up devices. For all devices, the kernel exports a major/minor
number; if needed, udev creates a device node with the default kernel
name. If specified, udev applies permissions/ownership to the device
node, creates additional symlinks pointing to the node, and executes
http://www.kernel.org/pub/linux/utils/kernel/hotplug/libudev/
http://www.kernel.org/pub/linux/utils/kernel/hotplug/gudev/
-For more details about udev and udev rules see the udev(7) man page.
+For more details about udev and udev rules, see the udev man pages:
+ http://www.kernel.org/pub/linux/utils/kernel/hotplug/udev/
Please direct any comment/question to the linux-hotplug mailing list at:
linux-hotplug@vger.kernel.org