Re: Does RUN work with "remove" events?

[Moshe Yudkowsky <msha5_17@bl.com>]

Kay Sievers wrote:

 > On Wed, Nov 30, 2005 at 04:14:45PM -0600, Moshe Yudkowsky wrote:
 >
 >> I've written a udev rule to add a UMS flash drive with device name 
/dev/ums:
 >>
 >> SYSFS{product}="Flash Disk", NAME="ums", RUN+="/etc/hotplug/usb/ums"
 >
 >
 >
 > Sysfs values are not readable at remove, cause the device directory is
 > already gone. You need to match against properties which you can see in
 > udevmonitor --env or you need to store a custom key with ENV{key}="value"
 > in the database, which is imported on remove.


Kay,

Thank you very much. I suspected that something of the sort was 
happening; but I wasn't aware that custom keys for ENV were possible. 
(It's not on the man page.)

Here's my fix. I've created the following rules:

ACTION="add", SYSFS{product}="Flash Disk",  NAME="ums", 
RUN+="/etc/hotplug/usb/ums", ENV{flashdrive}="%p"

ACTION="remove", ENV{flashdrive}="%p", RUN+="/etc/hotplug/usb/ums"

The first rule sets, on an "add," the custom environment variable 
"flashdrive" to the value of DEVPATH (%p). The 2nd rule checks, on a 
"remove," to see if the devpath that's being removed is the one for the 
flash drive -- if so, the designated script runs.

-- 
  Moshe Yudkowsky
  work: http://www.Disaggregate.com
  book: http://www.PebbleAndAvalanche.com


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