Re: replace dev.d/ with a rule based program execution

[Harald Hoyer <harald@redhat.com>]

Kay Sievers wrote:
...
> I've replaced the following:
>   [kay@pim ~]$ tree /etc/dev.d/
>   /etc/dev.d/
>   |-- default
>   |   |-- 00-log.dev
>   |   |-- 05-pam_console.dev -> ../../udev/scripts/pam_console.dev
>   |   `-- 10-hal.dev -> /usr/libexec/hal.dev
>   |-- fd0
>   |   `-- 10-MAKEDEV.dev -> ../../udev/scripts/MAKEDEV.dev
>   |-- fd1
>   |   `-- 10-MAKEDEV.dev -> ../../udev/scripts/MAKEDEV.dev
>   |-- fd2
>   |   `-- 10-MAKEDEV.dev -> ../../udev/scripts/MAKEDEV.dev
>   |-- fd3
>   |   `-- 10-MAKEDEV.dev -> ../../udev/scripts/MAKEDEV.dev
>   `-- sound
>       `-- alsa.dev
> 
> With these rules:
>   KERNEL="ttyUSB*", HOTPLUG="<usb-serial-device program>"
>   SUBSYSTEM="tty", OPTIONS="no_hotplug"
>   SUBSYSTEM="vc", OPTIONS="no_hotplug"
> 
>   ACTION="add", SUBSYSTEM="sound", HOTPLUG="/etc/dev.d/sound/alsa.dev"
>   ACTION="add", KERNEL="fd*", HOTPLUG="/etc/udev/scripts/MAKEDEV.dev"
>   ACTION="add", HOTPLUG="/etc/udev/scripts/pam_console.dev"
> 
>   HOTPLUG="/usr/libexec/hal.dev"
>   HOTPLUG="/etc/dev.d/default/00-log.dev"
> 
> On my box, udevstart takes 2.1 seconds instead of 8.6 seconds to run with
> my default setup. Mainly because it will not run anything for all the virtual
> tty devices. Any tty device which should be catched, needs a rule before the
> "no_hotplug" option.

Very nice! I like that :)


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