getting udev to work with USB combo drive

[Dave Hansen <haveblue@us.ibm.com>]

I have a pretty stupid USB combo device that doesn't like to report very
detailed information about itself (For Google's sake, the drive is a
Vosonic X's Drive Pro VP-300):
    SYSFS_vendor="USB     "
    SYSFS_model="USB             "
    SYSFS_rev="1.00"

Despite that, SYSFS_serial looked good, so I decided to use it for
udev.  The device has an internal hard disk, and 3 media slots, so I
laid out 3 entries like this:
SYSFS_serial="0123", ID="*:0", NAME="xdrive/disk%n"
SYSFS_serial="0123", ID="*:1", NAME="xdrive/cf%n"
SYSFS_serial="0123", ID="*:2", NAME="xdrive/sm%n"
SYSFS_serial="0123", ID="*:3", NAME="xdrive/xd%n"

But, these rules never matched.  The wildcard in the ID= field appears
to be ignored.  Is that a bug? 

I worked around it with a script of my own and a single udev.rules
entry:
BUS="usb", SYSFS_serial="0123",	PROGRAM="/path/xdrive.sh %b", RESULT="*", NAME="xdrive/%c%n"

#!/bin/sh
ID=$1
# strip out everything before the last :
SLOT_NUM=${ID/*:/}

case $SLOT_NUM in
	0) NAME=disk ;;
	1) NAME=compactflash ;;
	2) NAME=smartmedia ;;
	3) NAME=xd ;;
esac

echo -n $NAME

--dave



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