Re: udev: how to do it right?

[John L Fjellstad <john-debian@fjellstad.org>]

Antonio Rodriguez <arodriguez31@cfl.rr.com> writes:

> hpd:/home/tony# ls /usr/local/bin/lsbus
> ls: /usr/local/bin/lsbus: No such file or directory
> hpd:/home/tony# ls /usr/local/bin/systool
> ls: /usr/local/bin/systool: No such file or directory

Debian packages will never install stuff in /usr/local/bin.  If any
documentation mentions /usr/local, then it's presumed that you have
compiled by hand.  Otherwise, the binaries will always be in /usr/bin.

I looked through the documentation mentioned, and it makes some mistakes
(mostly stuff that has been deprecated in never udev).

For instance, memorystick isn't necessary a scsi device. At my place,
it's a USB device:

  Device = "3-1"
  Device path = "/sys/devices/pci0000:00/0000:00:1d.2/usb3/3-1"
    bConfigurationValue = "1"
    bDeviceClass        = "00"
    bDeviceProtocol     = "00"
    bDeviceSubClass     = "00"
    bMaxPower           = "200mA"
    bNumConfigurations  = "1"
    bNumInterfaces      = " 1"
    bcdDevice           = "0140"
    bmAttributes        = "c0"
    detach_state        = "0"
    idProduct           = "0069"
    idVendor            = "054c"
    manufacturer        = "Sony"
    product             = "USB Memory Stick Slot"
    speed               = "12"

The udev rule I would create for this would be
BUS="usb", SYSFS{manufacturer}="Sony", SYSFS{product}="USB Memory Stick\ 
Slot", NAME{all_partitions}="Memstick"

Note that the format has changed a little (the old format is deprecated,
and was totally removed starting with version 023).

Also, note the {all_partitions} attribute in NAME. There was a problem
with the node (ie memstick1) not beging created unless it is accessed,
but it can't be accessed without being created.  So, the all_partitions
attribute was created to statically create the nodes.

-- 
John L. Fjellstad
web: http://www.fjellstad.org/          Quis custodiet ipsos custodes