LinuxQuestions.org - udev RUN+= doesn't seem to work

So, I finally got it - still not perfect, but it works for now.
It was executing the script multiple times because of some kind of device hierarchy that I don't quite get yet. If you do a udevinfo on a device you'll see information for that device, and it's parent device, and it's parent's parent device, and so on, all the way up to the actual pci bus. Well, the model name for my device shows up a couple layers up. The serial number for the device shows up in an even higher layer. I tried matching on that instead of the model. It executed the script even more times. So I tried matching on an attribute on the "lowest" device which showed up in the udevinfo. It worked - the script was only executed once each time I inserted the card. So, apparently, it's executing the rule some number of times for each of these layers. Pretty weird. I wonder if it just has something to do with the way my distro (Zenwalk) is set up. I'll eventually get around to testing this on my Gentoo system, which hopefully will be more straightforward.

The remaining problem is now that I'm matching on a rather general attribute - the size. This is because there isn't anything more specific than that for that lowest-level device. If I add anything else with the same size, it will probably run this rule.

Here is the udevinfo for the device if it makes things any clearer.

Code:

  looking at device '/block/sdb':

    KERNEL=="sdb"

    SUBSYSTEM=="block"

    DRIVER==""

    ATTR{stat}=="      86      278      567      692        0        0        0        0        0      580      692"

    ATTR{size}=="1956864"

    ATTR{removable}=="1"

    ATTR{range}=="16"

    ATTR{dev}=="8:16"



  looking at parent device '/devices/pci0000:00/0000:00:1f.2/usb1/1-2/1-2:1.0/host21/target21:0:0/21:0:0:0':

    KERNELS=="21:0:0:0"

    SUBSYSTEMS=="scsi"

    DRIVERS=="sd"

    ATTRS{ioerr_cnt}=="0x2"

    ATTRS{iodone_cnt}=="0x66"

    ATTRS{iorequest_cnt}=="0x66"

    ATTRS{iocounterbits}=="32"

    ATTRS{timeout}=="30"

    ATTRS{state}=="running"

    ATTRS{rev}=="1.00"

    ATTRS{model}=="Flash Reader    "

    ATTRS{vendor}=="Multi  "

    ATTRS{scsi_level}=="3"

    ATTRS{type}=="0"

    ATTRS{queue_type}=="none"

    ATTRS{queue_depth}=="1"

    ATTRS{device_blocked}=="0"

    ATTRS{max_sectors}=="240"



  looking at parent device '/devices/pci0000:00/0000:00:1f.2/usb1/1-2/1-2:1.0/host21/target21:0:0':

    KERNELS=="target21:0:0"

    SUBSYSTEMS==""

    DRIVERS==""



  looking at parent device '/devices/pci0000:00/0000:00:1f.2/usb1/1-2/1-2:1.0/host21':

    KERNELS=="host21"

    SUBSYSTEMS==""

    DRIVERS==""



  looking at parent device '/devices/pci0000:00/0000:00:1f.2/usb1/1-2/1-2:1.0':

    KERNELS=="1-2:1.0"

    SUBSYSTEMS=="usb"

    DRIVERS=="usb-storage"

    ATTRS{modalias}=="usb:v058Fp6331d0102dc00dsc00dp00ic08isc06ip50"

    ATTRS{bInterfaceProtocol}=="50"

    ATTRS{bInterfaceSubClass}=="06"

    ATTRS{bInterfaceClass}=="08"

    ATTRS{bNumEndpoints}=="02"

    ATTRS{bAlternateSetting}==" 0"

    ATTRS{bInterfaceNumber}=="00"



  looking at parent device '/devices/pci0000:00/0000:00:1f.2/usb1/1-2':

    KERNELS=="1-2"

    SUBSYSTEMS=="usb"

    DRIVERS=="usb"

    ATTRS{serial}=="058F0O1111B"

    ATTRS{product}=="Mass Storage Device"

    ATTRS{manufacturer}=="Generic"

    ATTRS{maxchild}=="0"

    ATTRS{version}==" 2.00"

    ATTRS{devnum}=="21"

    ATTRS{speed}=="12"

    ATTRS{bMaxPacketSize0}=="64"

    ATTRS{bNumConfigurations}=="1"

    ATTRS{bDeviceProtocol}=="00"

    ATTRS{bDeviceSubClass}=="00"

    ATTRS{bDeviceClass}=="00"

    ATTRS{bcdDevice}=="0102"

    ATTRS{idProduct}=="6331"

    ATTRS{idVendor}=="058f"

    ATTRS{bMaxPower}=="250mA"

    ATTRS{bmAttributes}=="80"

    ATTRS{bConfigurationValue}=="1"

    ATTRS{bNumInterfaces}==" 1"

    ATTRS{configuration}==""



  looking at parent device '/devices/pci0000:00/0000:00:1f.2/usb1':

    KERNELS=="usb1"

    SUBSYSTEMS=="usb"

    DRIVERS=="usb"

    ATTRS{serial}=="0000:00:1f.2"

    ATTRS{product}=="UHCI Host Controller"

    ATTRS{manufacturer}=="Linux 2.6.20 uhci_hcd"

    ATTRS{maxchild}=="2"

    ATTRS{version}==" 1.10"

    ATTRS{devnum}=="1"

    ATTRS{speed}=="12"

    ATTRS{bMaxPacketSize0}=="64"

    ATTRS{bNumConfigurations}=="1"

    ATTRS{bDeviceProtocol}=="00"

    ATTRS{bDeviceSubClass}=="00"

    ATTRS{bDeviceClass}=="09"

    ATTRS{bcdDevice}=="0206"

    ATTRS{idProduct}=="0000"

    ATTRS{idVendor}=="0000"

    ATTRS{bMaxPower}=="  0mA"

    ATTRS{bmAttributes}=="e0"

    ATTRS{bConfigurationValue}=="1"

    ATTRS{bNumInterfaces}==" 1"

    ATTRS{configuration}==""



  looking at parent device '/devices/pci0000:00/0000:00:1f.2':

    KERNELS=="0000:00:1f.2"

    SUBSYSTEMS=="pci"

    DRIVERS=="uhci_hcd"

    ATTRS{msi_bus}==""

    ATTRS{broken_parity_status}=="0"

    ATTRS{enable}=="1"

    ATTRS{modalias}=="pci:v00008086d00002442sv00001179sd0000FF00bc0Csc03i00"

    ATTRS{local_cpus}=="f"

    ATTRS{irq}=="5"

    ATTRS{class}=="0x0c0300"

    ATTRS{subsystem_device}=="0xff00"

    ATTRS{subsystem_vendor}=="0x1179"

    ATTRS{device}=="0x2442"

    ATTRS{vendor}=="0x8086"



  looking at parent device '/devices/pci0000:00':

    KERNELS=="pci0000:00"

    SUBSYSTEMS==""

    DRIVERS==""