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From: Stefanos Harhalakis <v13@it.teithe.gr>
To: linux-hotplug@vger.kernel.org
Subject: add an option for rules to be run after a device is created
Date: Wed, 04 Jan 2006 14:20:47 +0000	[thread overview]
Message-ID: <200601041620.48749.v13@it.teithe.gr> (raw)

Hi there,

  I'm using udev and I'd like to make a suggestion. I have these rules:

BUS="ide", KERNEL="*[!0-9]", PROGRAM="/etc/udev/scripts/get_serial %k", 
RESULT="WD-WMAEH1157379", SYMLINK="disk/root"
BUS="ide", KERNEL="*[0-9]", PROGRAM="/etc/udev/scripts/get_serial %k", 
RESULT="WD-WMAEH1157379", SYMLINK="disk/root%n"

which call a script that return the hard disk serial number using hdparm. I'm 
using this rule to find the root disk and enable its swap partition without 
knowing the device name.

  The problem is that the get_serial script is run before (for 
example) /dev/hda is created and hdparm cannot find the device (/dev is a 
tmpfs). This can be solved by running udevstart twice but I believe that 
there can be a better solution.

  I suggest you add an option that would mark rules to be examined *after* the 
device is created. This can be thought as a class of 'second pass' rules. 
Another solution is to delay the symlink rules but this may produce 
incompatibilities or other problems.

  I'm using udev 0.79, kernel 2.6.15.

Thanks in advace,

<<V13>>


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             reply	other threads:[~2006-01-04 14:20 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-01-04 14:20 Stefanos Harhalakis [this message]
2006-01-04 14:49 ` add an option for rules to be run after a device is created Kay Sievers
2006-01-04 15:37 ` Stefanos Harhalakis

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