udev rules -- file names -- just wondering??
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Hi;
I am looking at /etc/udev/rules.d, particularly 90-alsa.rules and
noticed that all the udev rules files are preceded by a number in their
name. Is that number significant? Or is it used just to avoid
duplicate names?
I was looking to see if I could chase down why undev produces a wierd
beep when it initiates on boot.
--
Regards Bill
Fedora 11, Gnome 2.26.3
Evo.2.26.3, Emacs 22.3.1
On Sun, 2009-08-02 at 15:13 -0400, Mail Lists wrote:
On 08/02/2009 01:56 PM, Todd Zullinger wrote:
> I wouldn't say udev(1) is silent on the matter. It just doesn't use
> the word(s) you might be searching for to describe the behavior. ;)
>
> Rules files
> The udev rules are read from the files located in the default
> rules directory /lib/udev/rules.d/, the custom rules directory
> /etc/udev/rules.d/ and the temporary rules directory
> /dev/.udev/rules.d/. All rule files are sorted and processed in
> lexical order, regardless in which of these directories they
> live.
>
> The operative phrase being '...sorted and processed in lexical order.'
>
>
Numbers and lexical order are not always ideal ... which is processed
first:
a) 99-xxx
b) 100-xxx
100-xx goes before 99-xx. You'll notice that there are no scripts
numbered above 99. Same with /etc/rc?.d. If there were a need for more
than 100 scripts, they could be renumbered 000-xx to 999-xx.
poc
On 08/02/2009 01:56 PM, Todd Zullinger wrote:
I wouldn't say udev(1) is silent on the matter. It just
doesn't use
the word(s) you might be searching for to describe the behavior. ;)
Rules files
The udev rules are read from the files located in the default
rules directory /lib/udev/rules.d/, the custom rules directory
/etc/udev/rules.d/ and the temporary rules directory
/dev/.udev/rules.d/. All rule files are sorted and processed in
lexical order, regardless in which of these directories they
live.
The operative phrase being '...sorted and processed in lexical order.'
Numbers and lexical order are not always ideal ... which is processed
first:
a) 99-xxx
b) 100-xxx
Also, the phrase 'regardless in which of these directories' - is
interesting - as no directory has precedence .. which is useful or
confusing depending on perspective I suppose ..
gene/
gene
Thanks Todd;
On Sun, 2009-08-02 at 13:56 -0400, Todd Zullinger wrote:
William Case wrote:
> By the way, I am still curious about the significance of the two
> digit prefix on udev/rules/ files. Man udev and udevd are silent on
> this.
I wouldn't say udev(1) is silent on the matter. It just doesn't use
the word(s) you might be searching for to describe the behavior. ;)
Rules files
The udev rules are read from the files located in the default
rules directory /lib/udev/rules.d/, the custom rules directory
/etc/udev/rules.d/ and the temporary rules directory
/dev/.udev/rules.d/. All rule files are sorted and processed in
lexical order, regardless in which of these directories they
live.
The operative phrase being '...sorted and processed in lexical order.'
One must remain always vigilant when reading a 'man' page !
--
Regards Bill
Fedora 11, Gnome 2.26.3
Evo.2.26.3, Emacs 22.3.1
Thanks Patrick and Mikkel;
On Sun, 2009-08-02 at 13:09 -0430, Patrick O'Callaghan wrote:
On Sun, 2009-08-02 at 12:35 -0400, William Case wrote:
> I am looking at /etc/udev/rules.d, particularly 90-alsa.rules and
> noticed that all the udev rules files are preceded by a number in
> their
> name. Is that number significant? Or is it used just to avoid
> duplicate names?
The number indicates the order in which the rules are applied, similar
to the number preceding startup/shutdown scripts in /etc/rc?.d
I thought it was something like that, but nowhere did I find a way to
confirm that thought.
--
Regards Bill
Fedora 11, Gnome 2.26.3
Evo.2.26.3, Emacs 22.3.1
William Case wrote:
By the way, I am still curious about the significance of the two
digit prefix on udev/rules/ files. Man udev and udevd are silent on
this.
I wouldn't say udev(1) is silent on the matter. It just doesn't use
the word(s) you might be searching for to describe the behavior. ;)
Rules files
The udev rules are read from the files located in the default
rules directory /lib/udev/rules.d/, the custom rules directory
/etc/udev/rules.d/ and the temporary rules directory
/dev/.udev/rules.d/. All rule files are sorted and processed in
lexical order, regardless in which of these directories they
live.
The operative phrase being '...sorted and processed in lexical order.'
--
Todd OpenPGP -> KeyID: 0xBEAF0CE3 | URL: www.pobox.com/~tmz/pgp
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Ninety percent of everything is crap.
-- Sturgeon's Law
William Case wrote:
Hi;
I am looking at /etc/udev/rules.d, particularly 90-alsa.rules and
noticed that all the udev rules files are preceded by a number in their
name. Is that number significant? Or is it used just to avoid
duplicate names?
I was looking to see if I could chase down why undev produces a wierd
beep when it initiates on boot.
It controls the order that the rules are processed. This can be
important if a rule stops further rule processing for a specific
device. The rules do not have to have a number, but it makes fowling
the order of rules easier. The processing order it the same as the
sorted ls order.
Mikkel
--
Do not meddle in the affairs of dragons,
for thou art crunchy and taste good with Ketchup!
Thanks Tom
On Sun, 2009-08-02 at 13:16 -0400, Tom Horsley wrote:
On Sun, 02 Aug 2009 12:35:54 -0400
William Case wrote:
> I was looking to see if I could chase down why undev produces a wierd
> beep when it initiates on boot.
Perhaps it is the same as this bug?
https://bugzilla.redhat.com/show_bug.cgi?id=495166
It probably is. I will add my comments to the bug.
However, I am still having several difficulties with ALSA -- same
difficulties as many people have already posted here. Some of the
problems are being blamed on PulseAudio which may not, in fact, be the
culprit. I have completely removed PulseAudio and my problems remain.
If I can get ALSA working in a stable manner I will re-introduce
PulseAudio and see what happens.
I think -- for whatever that is worth -- there is a a single bug in one
of the fundamental processes; ALSA, udev, hal, d-bus, the kernel or
DeviceKit that was introduced by an upgrade.
By the way, I am still curious about the significance of the two digit
prefix on udev/rules/ files. Man udev and udevd are silent on this.
--
Regards Bill
Fedora 11, Gnome 2.26.3
Evo.2.26.3, Emacs 22.3.1
On Sun, 2009-08-02 at 12:35 -0400, William Case wrote:
I am looking at /etc/udev/rules.d, particularly 90-alsa.rules and
noticed that all the udev rules files are preceded by a number in
their
name. Is that number significant? Or is it used just to avoid
duplicate names?
The number indicates the order in which the rules are applied, similar
to the number preceding startup/shutdown scripts in /etc/rc?.d
poc
On Sun, 02 Aug 2009 12:35:54 -0400
William Case wrote:
I was looking to see if I could chase down why undev produces a
wierd
beep when it initiates on boot.
Perhaps it is the same as this bug?
https://bugzilla.redhat.com/show_bug.cgi?id=495166
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Bill Case -
Genes MailLists -
Mikkel -
Patrick O'Callaghan -
Todd Zullinger -
Tom Horsley