Udev - revision history

Dank at 13:13, 21 July 2011

2011-07-21T13:13:29Z

← Older revision		Revision as of 13:13, 21 July 2011
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	==[[KVM]]==		==[[KVM]]==
	On [[Debian]] (unstable, 2009-06-20), the default kvm/udev setup results in <tt>/dev/kvm</tt> have mode 0666 and ownership <tt>root:root</tt>, despite the creation of a <tt>kvm</tt> group. To have this file instead created with <tt>root:kvm</tt> ownership, add <tt>/etc/udev/rules.d/50-kvm.rules</tt> with the contents:<pre>KERNEL=="kvm", NAME="%k", GROUP="kvm", MODE="0660"</pre>I got this information from [https://bugs.launchpad.net/ubuntu/+source/kvm/+bug/127704 Ubuntu bug 127704], and have reported it to [http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=493053 Debian bug 493053].		On [[Debian]] (unstable, 2009-06-20), the default kvm/udev setup results in <tt>/dev/kvm</tt> have mode 0666 and ownership <tt>root:root</tt>, despite the creation of a <tt>kvm</tt> group. To have this file instead created with <tt>root:kvm</tt> ownership, add <tt>/etc/udev/rules.d/50-kvm.rules</tt> with the contents:<pre>KERNEL=="kvm", NAME="%k", GROUP="kvm", MODE="0660"</pre>I got this information from [https://bugs.launchpad.net/ubuntu/+source/kvm/+bug/127704 Ubuntu bug 127704], and have reported it to [http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=493053 Debian bug 493053].
			==CDROMs==
			On [[Debian]] unstable, <tt>/etc/udev/rules.d/70-persistent-cd.rules</tt> maps ATA/SAS/SCSI bus IDs to symlinks. Moving a CD/DVD/BR drive will thus create a new symlink group (/dev/dvd1, /dev/cdrw1, etc).
			==Monitoring udev events==
			<tt>udevadm monitor --environment kernel</tt>

Dank: /* KVM */

2009-06-21T12:26:51Z

KVM

← Older revision		Revision as of 12:26, 21 June 2009
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	==[[KVM]]==		==[[KVM]]==
	On [[Debian]] (unstable, 2009-06-20), the default [[kvm]]/udev setup results in <tt>/dev/kvm</tt> have mode 0666 and ownership <tt>root:root</tt>, despite the creation of a <tt>kvm</tt> group. To have this file instead created with <tt>root:kvm</tt> ownership, add <tt>/etc/udev/rules.d/50-kvm.rules</tt> with the contents:<pre>KERNEL=="kvm", NAME="%k", GROUP="kvm", MODE="0660"</pre>I got this information from [https://bugs.launchpad.net/ubuntu/+source/kvm/+bug/127704 Ubuntu bug 127704], and have reported it to [http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=493053 Debian bug 493053].		On [[Debian]] (unstable, 2009-06-20), the default kvm/udev setup results in <tt>/dev/kvm</tt> have mode 0666 and ownership <tt>root:root</tt>, despite the creation of a <tt>kvm</tt> group. To have this file instead created with <tt>root:kvm</tt> ownership, add <tt>/etc/udev/rules.d/50-kvm.rules</tt> with the contents:<pre>KERNEL=="kvm", NAME="%k", GROUP="kvm", MODE="0660"</pre>I got this information from [https://bugs.launchpad.net/ubuntu/+source/kvm/+bug/127704 Ubuntu bug 127704], and have reported it to [http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=493053 Debian bug 493053].

Dank at 12:26, 21 June 2009

2009-06-21T12:26:31Z

← Older revision		Revision as of 12:26, 21 June 2009
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	==[[KVM]]==		==[[KVM]]==
	On [[Debian]] (unstable, 2009-06-20), the default [[kvm]]/udev setup results in <tt>/dev/kvm</tt> have mode 0666 and ownership <tt>root:root</tt>, despite the creation of a <tt>kvm</tt> group. To have this file instead created with <tt>root:kvm</tt> ownership, add <tt>/etc/udev/rules.d/50-kvm.rules</tt> with the contents:<pre>KERNEL=="kvm", NAME="%k", GROUP="kvm", MODE="0660"</pre>I got this information from [https://bugs.launchpad.net/ubuntu/+source/kvm/+bug/127704 Ubuntu bug 127704].		On [[Debian]] (unstable, 2009-06-20), the default [[kvm]]/udev setup results in <tt>/dev/kvm</tt> have mode 0666 and ownership <tt>root:root</tt>, despite the creation of a <tt>kvm</tt> group. To have this file instead created with <tt>root:kvm</tt> ownership, add <tt>/etc/udev/rules.d/50-kvm.rules</tt> with the contents:<pre>KERNEL=="kvm", NAME="%k", GROUP="kvm", MODE="0660"</pre>I got this information from [https://bugs.launchpad.net/ubuntu/+source/kvm/+bug/127704 Ubuntu bug 127704], and have reported it to [http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=493053 Debian bug 493053].

Dank: /* KVM */

2009-06-21T12:16:28Z

KVM

← Older revision		Revision as of 12:16, 21 June 2009
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	==[[KVM]]==		==[[KVM]]==
	On [[Debian]] (unstable, 2009-06-20), the default [[kvm]]/udev setup results in <tt>/dev/kvm</tt> have mode 0666 and ownership <tt>root:root</tt>, despite the creation of a <tt>kvm</tt> group. To have this file instead created with <tt>root:kvm</tt> ownership~~, according to [https://bugs.launchpad.net/ubuntu/+source/kvm/+bug/127704 Ubuntu bug 127704]~~, add <tt>/etc/udev/rules.d/50-kvm.rules</tt> with the contents:<pre>KERNEL=="kvm", NAME="%k", GROUP="kvm", MODE="0660"</pre>.		On [[Debian]] (unstable, 2009-06-20), the default [[kvm]]/udev setup results in <tt>/dev/kvm</tt> have mode 0666 and ownership <tt>root:root</tt>, despite the creation of a <tt>kvm</tt> group. To have this file instead created with <tt>root:kvm</tt> ownership, add <tt>/etc/udev/rules.d/50-kvm.rules</tt> with the contents:<pre>KERNEL=="kvm", NAME="%k", GROUP="kvm", MODE="0660"</pre>I got this information from [https://bugs.launchpad.net/ubuntu/+source/kvm/+bug/127704 Ubuntu bug 127704].

Dank at 12:15, 21 June 2009

2009-06-21T12:15:49Z

← Older revision		Revision as of 12:15, 21 June 2009
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	udev is introduced by the sparse website at http://www.kernel.org/pub/linux/utils/kernel/hotplug/udev.html. It extended, superseded and utterly replaced [http://www.atnf.csiro.au/people/rgooch/linux/docs/devfs.html devfs], a turn-of-the-century abortion birthed by [http://www.atnf.csiro.au/people/rgooch/linux/kernel-patches.html Richard Gooch] (for details on this gory struggle (long since settled in udev's favor), see Greg Kroah-Hartman's whitepaper, '[http://www.kernel.org/pub/linux/utils/kernel/hotplug/udev_vs_devfs udev and devfs - the final word]'. It implements device naming for Linux systems -- that is, maps kernel hardware entities to userspace keys. Furthermore, it emits low-level [[DBus]] messages; clients such as [[HAL]] can listen to these events and perform arbitrarily complex actions. udev is made up of both a kernel component (included in 2.6 Linux kernels; 2.6.19 is the minimum recommended version as of this writing (see the [http://git.kernel.org/?p=linux/hotplug/udev.git;a=blob;hb=HEAD;f=README kernel documentation])) and a userspace daemon (<tt>udevd</tt>) plus its configuration.		udev is introduced by the sparse website at http://www.kernel.org/pub/linux/utils/kernel/hotplug/udev.html. It extended, superseded and utterly replaced [http://www.atnf.csiro.au/people/rgooch/linux/docs/devfs.html devfs], a turn-of-the-century abortion birthed by [http://www.atnf.csiro.au/people/rgooch/linux/kernel-patches.html Richard Gooch] (for details on this gory struggle (long since settled in udev's favor), see Greg Kroah-Hartman's whitepaper, '[http://www.kernel.org/pub/linux/utils/kernel/hotplug/udev_vs_devfs udev and devfs - the final word]'. It implements device naming for Linux systems -- that is, maps kernel hardware entities to userspace keys. Furthermore, it emits low-level [[DBus]] messages; clients such as [[HAL]] can listen to these events and perform arbitrarily complex actions. udev is made up of both a kernel component (included in 2.6 Linux kernels; 2.6.19 is the minimum recommended version as of this writing (see the [http://git.kernel.org/?p=linux/hotplug/udev.git;a=blob;hb=HEAD;f=README kernel documentation])) and a userspace daemon (<tt>udevd</tt>) plus its configuration.

			==Interface naming==

			==[[KVM]]==
			On [[Debian]] (unstable, 2009-06-20), the default [[kvm]]/udev setup results in <tt>/dev/kvm</tt> have mode 0666 and ownership <tt>root:root</tt>, despite the creation of a <tt>kvm</tt> group. To have this file instead created with <tt>root:kvm</tt> ownership, according to [https://bugs.launchpad.net/ubuntu/+source/kvm/+bug/127704 Ubuntu bug 127704], add <tt>/etc/udev/rules.d/50-kvm.rules</tt> with the contents:<pre>KERNEL=="kvm", NAME="%k", GROUP="kvm", MODE="0660"</pre>.

WikiSysop: 1 revision

2009-01-28T07:32:16Z

1 revision

← Older revision		Revision as of 07:32, 28 January 2009
(No difference)

Dank at 08:01, 21 October 2008

2008-10-21T08:01:53Z

New page

udev is introduced by the sparse website at http://www.kernel.org/pub/linux/utils/kernel/hotplug/udev.html. It extended, superseded and utterly replaced [http://www.atnf.csiro.au/people/rgooch/linux/docs/devfs.html devfs], a turn-of-the-century abortion birthed by [http://www.atnf.csiro.au/people/rgooch/linux/kernel-patches.html Richard Gooch] (for details on this gory struggle (long since settled in udev's favor), see Greg Kroah-Hartman's whitepaper, '[http://www.kernel.org/pub/linux/utils/kernel/hotplug/udev_vs_devfs udev and devfs - the final word]'. It implements device naming for Linux systems -- that is, maps kernel hardware entities to userspace keys. Furthermore, it emits low-level [[DBus]] messages; clients such as [[HAL]] can listen to these events and perform arbitrarily complex actions. udev is made up of both a kernel component (included in 2.6 Linux kernels; 2.6.19 is the minimum recommended version as of this writing (see the [http://git.kernel.org/?p=linux/hotplug/udev.git;a=blob;hb=HEAD;f=README kernel documentation])) and a userspace daemon (<tt>udevd</tt>) plus its configuration.