pattern matching in udev

DISCUSSION Stephane Chauveau 2 participants 2 messages Dec 3, 2003 – Dec 4, 2003

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Stephane Chauveau

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2003-12-03 19:19 UTC #0 lore raw

Quoted 8 lines

Quoted 2 lines
REGEXP "<$bus><$vendor><$id>"="<scsi><ImageMate.*><.*:0:0:$.*$>",
             NAME="mem\1-%n"
IMO the pattern matching should be part of the TOPOLOGY plus PLACE.
The scsi naming also requires a parent, your example above is only valid if you have one host adapter connected (or one usb mass storage device attached), there could exist another sd on *:0:0:0.

Not really because my example matches the $bus, the $id and the $vendor. A single method capable of pattern matching on all the available informations could be used to replace all the methods currently in implemented in udev (except maybe REPLACE which has a different purpose).

Stephane.

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Patrick Mansfield

2003-12-04 06:53 UTC #1 lore raw

Quoted 10 lines · Stephane Chauveau

Quoted 8 lines
Quoted 2 lines
REGEXP "<$bus><$vendor><$id>"="<scsi><ImageMate.*><.*:0:0:$.*$>",
             NAME="mem\1-%n"
IMO the pattern matching should be part of the TOPOLOGY plus PLACE.
The scsi naming also requires a parent, your example above is only valid if you have one host adapter connected (or one usb mass storage device attached), there could exist another sd on *:0:0:0.
Not really because my example matches the $bus, the $id and the $vendor.

There could be another identical scsi device with the same id and vendor.

I thought the PCI sysfs id's were constant for a given hardware, but I'm told they can change with PCI hotplug, so the full sysfs path I mentioned previously will not be constant across boots with PCI hotplugging.

Quoted 3 lines

A single method capable of pattern matching on all the available informations could be used to replace all the methods currently in implemented in udev (except maybe REPLACE which has a different purpose).

-- Patrick Mansfield