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udev

Использование подсистемы udev в Gentoo

Захотелось сделать как обычно - автомонтирование фотоаппарата. телефона и флешек, причем в разные mount point. Второе - пробрасывать определенные устройства внутрь виртуальных машин.

Общие правила

  • Udev считывает файлы из /etc/udev/rules.d в алфавитном порядке.
  • Найдя первое подходящее правило для устройства, udev прекращает дальнейший поиск.

Автомониирование

Подключаю устройство (в моем случае это телефон, флешка в котором видиться как диск)

Как определилось устройство?

13:35:03-root@sirmax:~#dmesg  |  tail
[6050777.245910] scsi 21:0:0:0: Direct-Access                                    PQ: 0 ANSI: 0
[6050777.246123] sd 21:0:0:0: Attached scsi generic sg6 type 0
[6050777.395654] sd 21:0:0:0: [sdf] 15572992 512-byte logical blocks: (7.97 GB/7.42 GiB)
[6050777.445663] sd 21:0:0:0: [sdf] Write Protect is off
[6050777.445669] sd 21:0:0:0: [sdf] Mode Sense: 00 06 00 00
[6050777.445672] sd 21:0:0:0: [sdf] Assuming drive cache: write through
[6050777.493599] sd 21:0:0:0: [sdf] Assuming drive cache: write through
[6050777.498359]  sdf: sdf1
[6050777.508225] sd 21:0:0:0: [sdf] Assuming drive cache: write through
[6050777.508231] sd 21:0:0:0: [sdf] Attached SCSI removable disk

Определить всю информацию о устройстве

Полезно мониторить:

16:27:50-root@sirmax:/etc/udev#udevadm monitor
monitor will print the received events for:
UDEV - the event which udev sends out after rule processing
KERNEL - the kernel uevent

Определить всю информацию о устройстве

13:32:56-root@sirmax:~#udevadm info -a  --name=sdf

Udevadm info starts with the device specified by the devpath and then
walks up the chain of parent devices. It prints for every device
found, all possible attributes in the udev rules key format.
A rule to match, can be composed by the attributes of the device
and the attributes from one single parent device.

  looking at device '/devices/pci0000:00/0000:00:0b.1/usb2/2-3/2-3.2/2-3.2:1.0/host21/target21:0:0/21:0:0:0/block/sdf':
    KERNEL=="sdf"
    SUBSYSTEM=="block"
    DRIVER==""
    ATTR{range}=="16"
    ATTR{ext_range}=="256"
    ATTR{removable}=="1"
    ATTR{ro}=="0"
    ATTR{size}=="15572992"
    ATTR{alignment_offset}=="0"
    ATTR{discard_alignment}=="0"
    ATTR{capability}=="51"
    ATTR{stat}=="      64       26      720      356        0        0        0        0        0      356      356"
    ATTR{inflight}=="       0        0"

  looking at parent device '/devices/pci0000:00/0000:00:0b.1/usb2/2-3/2-3.2/2-3.2:1.0/host21/target21:0:0/21:0:0:0':
    KERNELS=="21:0:0:0"
    SUBSYSTEMS=="scsi"
    DRIVERS=="sd"
    ATTRS{device_blocked}=="0"
    ATTRS{type}=="0"
    ATTRS{scsi_level}=="0"
    ATTRS{vendor}=="        "
    ATTRS{model}=="                "
    ATTRS{rev}=="    "
    ATTRS{state}=="running"
    ATTRS{timeout}=="30"
    ATTRS{iocounterbits}=="32"
    ATTRS{iorequest_cnt}=="0x20fc"
    ATTRS{iodone_cnt}=="0x20fc"
    ATTRS{ioerr_cnt}=="0x0"
    ATTRS{modalias}=="scsi:t-0x00"
    ATTRS{evt_media_change}=="0"
    ATTRS{queue_depth}=="1"
    ATTRS{queue_type}=="none"
    ATTRS{max_sectors}=="240"

  looking at parent device '/devices/pci0000:00/0000:00:0b.1/usb2/2-3/2-3.2/2-3.2:1.0/host21/target21:0:0':
    KERNELS=="target21:0:0"
    SUBSYSTEMS=="scsi"
    DRIVERS==""

  looking at parent device '/devices/pci0000:00/0000:00:0b.1/usb2/2-3/2-3.2/2-3.2:1.0/host21':
    KERNELS=="host21"
    SUBSYSTEMS=="scsi"
    DRIVERS==""

  looking at parent device '/devices/pci0000:00/0000:00:0b.1/usb2/2-3/2-3.2/2-3.2:1.0':
    KERNELS=="2-3.2:1.0"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb-storage"
    ATTRS{bInterfaceNumber}=="00"
    ATTRS{bAlternateSetting}==" 0"
    ATTRS{bNumEndpoints}=="02"
    ATTRS{bInterfaceClass}=="08"
    ATTRS{bInterfaceSubClass}=="06"
    ATTRS{bInterfaceProtocol}=="50"
    ATTRS{modalias}=="usb:v0BB4p0C15d0000dc00dsc00dp00ic08isc06ip50"
    ATTRS{supports_autosuspend}=="1"

  looking at parent device '/devices/pci0000:00/0000:00:0b.1/usb2/2-3/2-3.2':
    KERNELS=="2-3.2"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{configuration}==""
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bmAttributes}=="c0"
    ATTRS{bMaxPower}=="500mA"
    ATTRS{urbnum}=="16998"
    ATTRS{idVendor}=="0bb4"
    ATTRS{idProduct}=="0c15"
    ATTRS{bcdDevice}=="0000"
    ATTRS{bDeviceClass}=="00"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bDeviceProtocol}=="00"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{speed}=="480"
    ATTRS{busnum}=="2"
    ATTRS{devnum}=="22"
    ATTRS{devpath}=="3.2"
    ATTRS{version}==" 2.00"
    ATTRS{maxchild}=="0"
    ATTRS{quirks}=="0x0"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{authorized}=="1"
    ATTRS{manufacturer}=="HTC"
    ATTRS{product}=="Storage"
    ATTRS{serial}=="3fbf5000-7351-0801-3583-530114835680"

  looking at parent device '/devices/pci0000:00/0000:00:0b.1/usb2/2-3':
    KERNELS=="2-3"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{configuration}==""
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bmAttributes}=="e0"
    ATTRS{bMaxPower}=="100mA"
    ATTRS{urbnum}=="480"
    ATTRS{idVendor}=="05e3"
    ATTRS{idProduct}=="0605"
    ATTRS{bcdDevice}=="060b"
    ATTRS{bDeviceClass}=="09"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bDeviceProtocol}=="01"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{speed}=="480"
    ATTRS{busnum}=="2"
    ATTRS{devnum}=="2"
    ATTRS{devpath}=="3"
    ATTRS{version}==" 2.00"
    ATTRS{maxchild}=="4"
    ATTRS{quirks}=="0x0"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{authorized}=="1"
    ATTRS{product}=="USB2.0 Hub"

  looking at parent device '/devices/pci0000:00/0000:00:0b.1/usb2':
    KERNELS=="usb2"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{configuration}==""
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bmAttributes}=="e0"
    ATTRS{bMaxPower}=="  0mA"
    ATTRS{urbnum}=="36"
    ATTRS{idVendor}=="1d6b"
    ATTRS{idProduct}=="0002"
    ATTRS{bcdDevice}=="0206"
    ATTRS{bDeviceClass}=="09"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bDeviceProtocol}=="00"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{speed}=="480"
    ATTRS{busnum}=="2"
    ATTRS{devnum}=="1"
    ATTRS{devpath}=="0"
    ATTRS{version}==" 2.00"
    ATTRS{maxchild}=="8"
    ATTRS{quirks}=="0x0"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{authorized}=="1"
    ATTRS{manufacturer}=="Linux 2.6.37-rc6-sirmax1 ehci_hcd"
    ATTRS{product}=="EHCI Host Controller"
    ATTRS{serial}=="0000:00:0b.1"
    ATTRS{authorized_default}=="1"

  looking at parent device '/devices/pci0000:00/0000:00:0b.1':
    KERNELS=="0000:00:0b.1"
    SUBSYSTEMS=="pci"
    DRIVERS=="ehci_hcd"
    ATTRS{vendor}=="0x10de"
    ATTRS{device}=="0x026e"
    ATTRS{subsystem_vendor}=="0x1458"
    ATTRS{subsystem_device}=="0x5004"
    ATTRS{class}=="0x0c0320"
    ATTRS{irq}=="23"
    ATTRS{local_cpus}=="f"
    ATTRS{local_cpulist}=="0-3"
    ATTRS{modalias}=="pci:v000010DEd0000026Esv00001458sd00005004bc0Csc03i20"
    ATTRS{dma_mask_bits}=="32"
    ATTRS{consistent_dma_mask_bits}=="32"
    ATTRS{enable}=="1"
    ATTRS{broken_parity_status}=="0"
    ATTRS{msi_bus}==""
    ATTRS{companion}==""

  looking at parent device '/devices/pci0000:00':
    KERNELS=="pci0000:00"
    SUBSYSTEMS==""
    DRIVERS==""

Простейшее правило

Создаю простейшее правило /etc/udev/rules.d/99-usb.rules

BUS=="usb", SUBSYSTEM=="block", KERNEL=="sd*", ACTION=="add", NAME="%k", GROUP="disk", RUN+="/etc/udev/udev-flash-mount.sh add %k"                                                                                                           

Cоответвенно скрипт

#!bin/bash                                                                                                                                                                                                                                   
LOGGER="usr/bin//logger -t [udev-flash-mount.sh]"                                                                                                                                                                                            
env | $LOGGER                                                                                                                                                                                                                                
echo $1 $2 | $LOGGER     

При подключении

13:58:38-root@sirmax:/etc/udev#cat /var/log/messages  | grep udev-flash-mount.sh
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_USB_DRIVER=usb-storage
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_MODEL=Storage
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_MODEL_ENC=Storage
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_REVISION=0000
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: DEVTYPE=disk
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: UDISKS_PARTITION_TABLE=1
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_BUS=usb
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: SUBSYSTEM=block
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_SERIAL=HTC_Storage_3fbf5000-7351-0801-3583-530114835680-0:0
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: DEVPATH=/devices/pci0000:00/0000:00:0b.1/usb2/2-3/2-3.2/2-3.2:1.0/host26/target26:0:0/26:0:0:0/block/sdf
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_MODEL_ID=0c15
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_VENDOR_ENC=HTC
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: UDISKS_PARTITION_TABLE_SCHEME=mbr
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: MINOR=80
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ACTION=add
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: UDISKS_PARTITION_TABLE_COUNT=1
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: PWD=/
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: UDEV_LOG=3
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: MAJOR=8
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: DEVLINKS=/dev/block/8:80 /dev/disk/by-id/usb-HTC_Storage_3fbf5000-7351-0801-3583-530114835680-0:0 /dev/disk/by-path/pci-0000:00:0b.1-usb-0:3.2:1.0-scsi-0:0:0:0
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_VENDOR_ID=0bb4
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: DEVNAME=/dev/sdf
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: SHLVL=1
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_TYPE=disk
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_PART_TABLE_TYPE=dos
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: UDISKS_PRESENTATION_NOPOLICY=0
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_INSTANCE=0:0
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_VENDOR=HTC
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_USB_INTERFACE_NUM=00
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_SERIAL_SHORT=3fbf5000-7351-0801-3583-530114835680
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_PATH=pci-0000:00:0b.1-usb-0:3.2:1.0-scsi-0:0:0:0
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_USB_INTERFACES=:080650:
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: SEQNUM=1823
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: _=/usr/bin/env
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: add sdf
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_USB_DRIVER=usb-storage
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_MODEL=Storage
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_MODEL_ENC=Storage
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_REVISION=0000
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: DEVTYPE=partition
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_FS_LABEL=MOBILE
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_BUS=usb
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_FS_LABEL_ENC=MOBILE
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: SUBSYSTEM=block
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_SERIAL=HTC_Storage_3fbf5000-7351-0801-3583-530114835680-0:0
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_FS_UUID=A08C-E85D
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: UDISKS_PARTITION_OFFSET=4194304
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: DEVPATH=/devices/pci0000:00/0000:00:0b.1/usb2/2-3/2-3.2/2-3.2:1.0/host26/target26:0:0/26:0:0:0/block/sdf/sdf1
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_MODEL_ID=0c15
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_VENDOR_ENC=HTC
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: UDISKS_PARTITION_NUMBER=1
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_FS_VERSION=FAT32
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: MINOR=81
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ACTION=add
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: PWD=/
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: UDEV_LOG=3
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: UDISKS_PARTITION_ALIGNMENT_OFFSET=0
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_FS_TYPE=vfat
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: MAJOR=8
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: DEVLINKS=/dev/block/8:81 /dev/disk/by-id/usb-HTC_Storage_3fbf5000-7351-0801-3583-530114835680-0:0-part1 /dev/disk/by-path/pci-0000:00:0b.1-usb-0:3.2:1.0-scsi-0:0:0:0-part1 /dev/disk/by-uuid/A08C-E85D /dev/disk/by-label/MOBILE
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_VENDOR_ID=0bb4
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: DEVNAME=/dev/sdf1
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: SHLVL=1
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_FS_USAGE=filesystem
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_TYPE=disk
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_PART_TABLE_TYPE=dos
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: UDISKS_PRESENTATION_NOPOLICY=0
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: UDISKS_PARTITION_SIZE=7969177600
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_FS_UUID_ENC=A08C-E85D
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: UDISKS_PARTITION_SCHEME=mbr
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: UDISKS_PARTITION_TYPE=0x0b
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: UDISKS_PARTITION=1
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_INSTANCE=0:0
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_VENDOR=HTC
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_USB_INTERFACE_NUM=00
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_SERIAL_SHORT=3fbf5000-7351-0801-3583-530114835680
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: UDISKS_PARTITION_SLAVE=/sys/devices/pci0000:00/0000:00:0b.1/usb2/2-3/2-3.2/2-3.2:1.0/host26/target26:0:0/26:0:0:0/block/sdf
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_PATH=pci-0000:00:0b.1-usb-0:3.2:1.0-scsi-0:0:0:0
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: ID_USB_INTERFACES=:080650:
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: SEQNUM=1824
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: _=/usr/bin/env
Mar  5 13:58:28 sirmax [udev-flash-mount.sh]: add sdf1

Из этого вывода можно сделать 2 вывода

  1. информации что бы определить устройство и подмонтировать его достаточно
  2. скрипт будет вызван столько раз, сколько разделов будет на флешке + 1 раз для самого устройства (в моем случае /dev/sdf)

Скрипт обработки события

Набросал наколенный скрипт что бы монтировать те устройства что я включаю более менее часто не руками, а автоматически

#!/bin/bash

LOGGER="/usr/bin/logger -t [udev-flash-mount.sh][${1}]"

sleep 3

echo "Parameters are: "$1" "$2  | $LOGGER
if ! `echo $2 | grep -E "[0-9]" 2>/dev/null >/dev/null`
then
    echo "We can't mount/unmount device, only partitions ("${DEVNAME}") " | $LOGGER
    exit
fi


# Тут перечень моих устройств, с точками понтирования (пара "серийник в безопасном формате" == "точка монтирования"
HTC_Storage_3fbf5000_7351_0801_3583_530114835680_0_0="/media/HTC_touch_pro"
HTC_Storage_3fbf5000_7351_0801_3583_530114835680_0_0_mount_options="-o iocharset=koi8-r,rw,nosuid,nodev,uhelper=udisks,uid=1000,gid=1000,shortname=mixed,dmask=0077,flush"

OLYMPUS_C765UZ_000375045357_0_0="/media/Olympus_foto"
OLYMPUS_C765UZ_000375045357_0_0_mount_options="-o iocharset=koi8-r,rw,nosuid,nodev,uhelper=udisks,uid=1000,gid=1000,shortname=mixed,dmask=0077,flush"

# точка монтирования по умолчанию
MOUNT_POINT="/mnt"

# Для того что бы ссылаться на переменные они не должны содержать минусов и т.п...

ID_SERIAL_SAFE=`echo ${ID_SERIAL} | sed s/"-"/"_"/g | sed s/":"/"_"/g`


env             | $LOGGER
# Вообще то я все флешки монтирую просто в разные места, никакоой другой логики мне (пока) не нужно.


function detect_mouontpoint()
{
    eval MOUNT_POINT='$'${ID_SERIAL_SAFE}
    echo "We've detected mount point as: "$MOUNT_POINT | $LOGGER
    test -d $MOUNT_POINT || mkdir $MOUNT_POINT 2>&1 | $LOGGER
    return $MOUNT_POINT
}

function mount_device()
{
    echo "Starting mount divice "$2 | $LOGGER
    eval MOUNT_OPTIONS='$'${ID_SERIAL_SAFE}"_mount_options"
    echo "Mount option(s) are: "${MOUNT_OPTIONS} | $LOGGER
    echo "mount "${DEVNAME}" "${MOUNT_POINT}" "${MOUNT_OPTIONS} | $LOGGER
    mount ${DEVNAME} $MOUNT_POINT $MOUNT_OPTIONS 2>&1 | $LOGGER

}

function do_action()
{
echo "Do something with device ... parameter is: "$1    $LOGGER
case $1 in
    add)
        echo "Add device ... "${DEVNAME} |      $LOGGER             
        detect_mouontpoint
        mount_device
    ;;
    
    remove)
        echo "Remove device ... "${DEVNAME}     | $LOGGER
        umount ${DEVNAME} 2>&1          | $LOGGER
    ;;

    *)
        echo "Uncknown action, nothing to do" | $LOGGER
    ;;
esac
}

echo "Detecting devices ... "$ID_SERIAL | $LOGGER

case $ID_SERIAL in 
    "HTC_Storage_3fbf5000-7351-0801-3583-530114835680-0:0")
        echo "This is HTC (well-known device)" | $LOGGER
        do_action $1
    ;;

    "OLYMPUS_C765UZ_000375045357-0:0")
        do_action $1
    ;;

    *)
        echo "Uncknown device, nothing to do" | $LOGGER
    ;;
esac
echo "that is all." | $LOGGER