rules and RUN key

rules and RUN key

[Mangus]

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Hi all, I'm trying to study the RUN key of udev rules, but I really don't 
understand why this rule doesn't work..

BUS=="usb", SYSFS{product}="Sony DSC", KERNEL="sda1", ACTION=="add", 
SYMLINK+="digitalcamera", RUN="/opt/kde/bin/digikam"

the symlink 'digitalcamera is correctly done in /dev and I can easily mount it
but the RUN key seems not executed.
Does the RUN command has to be executed when a rule is matched?
what I'm missing or doing wrong??

root@saturno:~# udevtest /sys/block/sda/sda1 usb
main: looking at device '/block/sda/sda1' from subsystem 'usb'
add_to_rules: error parsing SYSFS attribute in 'BUS'
main: opened class_dev->name='sda1'
udev_rules_get_name: add symlink 'digitalcamera'
udev_rules_get_name: reset run list
udev_rules_get_name: rule applied, 'sda1' becomes 'sda1'
create_node: creating device node '/dev/sda1', major = '8', minor = '1', mode 
= '0660', uid = '0', gid = '6'
create_node: creating symlink '/dev/digitalcamera' to 'sda1'

root@saturno:~# udevmonitor
udevmonitor prints the received event from the kernel [UEVENT]
and the event which udev sends out after rule processing [UDEV]

UEVENT[1132699412.958174] add@/devices/pci0000:00/0000:00:03.3/usb1/1-1
UEVENT[1132699413.031376] 
add@/devices/pci0000:00/0000:00:03.3/usb1/1-1/1-1:1.0
UEVENT[1132699413.038090] add@/class/scsi_host/host3
UEVENT[1132699413.189695] add@/class/usb_device/usbdev1.5
UEVENT[1132699418.191140] 
add@/devices/pci0000:00/0000:00:03.3/usb1/1-1/1-1:1.0/host3/target3:0:0/3:0:0:0
UEVENT[1132699418.250136] add@/block/sda
UEVENT[1132699418.308443] add@/block/sda/sda1
UEVENT[1132699418.354008] add@/class/scsi_device/3:0:0:0


thanks for hints and explanations
-- 
Fede
Be cool - get Slack.
--

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Re: rules and RUN key

[Kay Sievers]

On Wed, Nov 23, 2005 at 12:01:29AM +0100, Mangus wrote:
> Hi all, I'm trying to study the RUN key of udev rules, but I really don't 
> understand why this rule doesn't work..
> 
> BUS="usb", SYSFS{product}="Sony DSC", KERNEL="sda1", ACTION="add", 
> SYMLINK+="digitalcamera", RUN="/opt/kde/bin/digikam"

You don't want to run root level programs from udev to show up in your
desktop session. This also can't work, cause digikam has no X display.

Usually a process in your user session subscribes to device events from
HAL and starts applications as the logged-in user.

Kay


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Re: rules and RUN key

[Harald Hoyer]

Kay Sievers wrote:
> On Wed, Nov 23, 2005 at 12:01:29AM +0100, Mangus wrote:
> 
>>Hi all, I'm trying to study the RUN key of udev rules, but I really don't 
>>understand why this rule doesn't work..
>>
>>BUS="usb", SYSFS{product}="Sony DSC", KERNEL="sda1", ACTION="add", 
>>SYMLINK+="digitalcamera", RUN="/opt/kde/bin/digikam"
> 
> 
> You don't want to run root level programs from udev to show up in your
> desktop session. This also can't work, cause digikam has no X display.
> 
> Usually a process in your user session subscribes to device events from
> HAL and starts applications as the logged-in user.
> 
> Kay
> 

Also RUN+= would be better.


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Re: rules and RUN key

[Mangus]

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Alle 00:18, mercoledì 23 novembre 2005, Kay Sievers ha scritto:
> On Wed, Nov 23, 2005 at 12:01:29AM +0100, Mangus wrote:
> > Hi all, I'm trying to study the RUN key of udev rules, but I really don't
> > understand why this rule doesn't work..
> >
> > BUS=="usb", SYSFS{product}="Sony DSC", KERNEL="sda1", ACTION=="add",
> > SYMLINK+="digitalcamera", RUN="/opt/kde/bin/digikam"
>
> You don't want to run root level programs from udev to show up in your
> desktop session. This also can't work, cause digikam has no X display.
>
yeah, that's right, my fault , thanks

> Usually a process in your user session subscribes to device events from
> HAL and starts applications as the logged-in user.
>
> Kay
ok, but the RUN key is intended to run external script as root, isn't it?
like modprobe commands or whethever
so why this rule don't execute the command?
BUS=="usb", SYSFS{product}=="Sony DSC", KERNEL=="sda1", ACTION=="add", 
SYMLINK+="digitalcamera", RUN+="/sbin/modprobe fuse"

fuse module for example is not loaded
is my version of udev too old?
it's udev64 

thanks

-- 
Fede
Be cool - get Slack.
--

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