Create udev rule to run Kppp when Haier CE682 plugged

Find device info with udevadm command:

root@pcxthinkslack:~# udevadm info -a -n /dev/ttyUSB0
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/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.1/1-1.1:1.0/ttyUSB0/tty/ttyUSB0':
    KERNEL=="ttyUSB0"
    SUBSYSTEM=="tty"
    DRIVER==""
  looking at parent device '/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.1/1-1.1:1.0/ttyUSB0':
    KERNELS=="ttyUSB0"
    SUBSYSTEMS=="usb-serial"
    DRIVERS=="option1"
    ATTRS{port_number}=="0"
  looking at parent device '/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.1/1-1.1:1.0':
    KERNELS=="1-1.1:1.0"
    SUBSYSTEMS=="usb"
    DRIVERS=="option"
    ATTRS{bInterfaceClass}=="ff"
    ATTRS{bInterfaceSubClass}=="ff"
    ATTRS{bInterfaceProtocol}=="ff"
    ATTRS{bNumEndpoints}=="02"
    ATTRS{supports_autosuspend}=="1"
    ATTRS{bAlternateSetting}==" 0"
    ATTRS{bInterfaceNumber}=="00"
    ATTRS{interface}=="Data Interface0"
  looking at parent device '/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.1':
    KERNELS=="1-1.1"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bDeviceProtocol}=="00"
    ATTRS{devpath}=="1.1"
    ATTRS{idVendor}=="201e"
    ATTRS{speed}=="12"
    ATTRS{bNumInterfaces}==" 4"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{busnum}=="1"
    ATTRS{devnum}=="53"
    ATTRS{configuration}=="CONF1"
    ATTRS{bMaxPower}=="500mA"
    ATTRS{authorized}=="1"
    ATTRS{bmAttributes}=="c0"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{maxchild}=="0"
    ATTRS{bcdDevice}=="0000"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{quirks}=="0x0"
    ATTRS{version}==" 1.10"
    ATTRS{urbnum}=="517"
    ATTRS{ltm_capable}=="no"
    ATTRS{manufacturer}=="China TeleCom"
    ATTRS{removable}=="removable"
    ATTRS{idProduct}=="1022"
    ATTRS{bDeviceClass}=="00"
    ATTRS{product}=="CBP7.1"
  looking at parent device '/devices/pci0000:00/0000:00:1a.0/usb1/1-1':
    KERNELS=="1-1"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bDeviceProtocol}=="01"
    ATTRS{devpath}=="1"
    ATTRS{idVendor}=="8087"
    ATTRS{speed}=="480"
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{busnum}=="1"
    ATTRS{devnum}=="2"
    ATTRS{configuration}==""
    ATTRS{bMaxPower}=="  0mA"
    ATTRS{authorized}=="1"
    ATTRS{bmAttributes}=="e0"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{maxchild}=="6"
    ATTRS{bcdDevice}=="0000"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{quirks}=="0x0"
    ATTRS{version}==" 2.00"
    ATTRS{urbnum}=="1615"
    ATTRS{ltm_capable}=="no"
    ATTRS{removable}=="fixed"
    ATTRS{idProduct}=="0024"
    ATTRS{bDeviceClass}=="09"
  looking at parent device '/devices/pci0000:00/0000:00:1a.0/usb1':
    KERNELS=="usb1"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bDeviceProtocol}=="00"
    ATTRS{devpath}=="0"
    ATTRS{idVendor}=="1d6b"
    ATTRS{speed}=="480"
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{authorized_default}=="1"
    ATTRS{busnum}=="1"
    ATTRS{devnum}=="1"
    ATTRS{configuration}==""
    ATTRS{bMaxPower}=="  0mA"
    ATTRS{authorized}=="1"
    ATTRS{bmAttributes}=="e0"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{maxchild}=="3"
    ATTRS{bcdDevice}=="0306"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{quirks}=="0x0"
    ATTRS{serial}=="0000:00:1a.0"
    ATTRS{version}==" 2.00"
    ATTRS{urbnum}=="104"
    ATTRS{ltm_capable}=="no"
    ATTRS{manufacturer}=="Linux 3.6.10-zen-pcx ehci_hcd"
    ATTRS{removable}=="unknown"
    ATTRS{idProduct}=="0002"
    ATTRS{bDeviceClass}=="09"
    ATTRS{product}=="EHCI Host Controller"
  looking at parent device '/devices/pci0000:00/0000:00:1a.0':
    KERNELS=="0000:00:1a.0"
    SUBSYSTEMS=="pci"
    DRIVERS=="ehci_hcd"
    ATTRS{irq}=="16"
    ATTRS{subsystem_vendor}=="0x17aa"
    ATTRS{broken_parity_status}=="0"
    ATTRS{class}=="0x0c0320"
    ATTRS{companion}==""
    ATTRS{consistent_dma_mask_bits}=="32"
    ATTRS{dma_mask_bits}=="32"
    ATTRS{local_cpus}=="ffffffff"
    ATTRS{device}=="0x1c2d"
    ATTRS{uframe_periodic_max}=="100"
    ATTRS{enable}=="1"
    ATTRS{msi_bus}==""
    ATTRS{local_cpulist}=="0-31"
    ATTRS{vendor}=="0x8086"
    ATTRS{subsystem_device}=="0x21ce"
    ATTRS{d3cold_allowed}=="1"
  looking at parent device '/devices/pci0000:00':
    KERNELS=="pci0000:00"
    SUBSYSTEMS==""
    DRIVERS==""

I used 4 parameters which are KERNEL, SUBSYSTEMS, product id and vendor. Next step is creating the rules based on the device informations (note that I assume that user bowo is the owner of the machine and this is a laptop not multiuser desktop PC):

root@pcxthinkslack:~# cat /etc/udev/rules.d/10-run-kppp.rules
KERNEL=="ttyUSB0", SUBSYSTEMS=="usb", ATTRS{idVendor}=="201e", ATTRS{idProduct}=="1022", ACTION=="add", RUN+="/bin/su bowo -c '/home/bowo/Apps/kppp.sh'"

Create shell script /home/bowo/Apps/kppp.sh

root@pcxthinkslack:~# cat /home/bowo/Apps/kppp.sh
#/bin/sh
if [ -f /home/bowo/.kde/share/apps/kppp/kppp.pid ]; then
    exit 1
else
    LANG=fr_FR.UTF-8 HOME=/home/bowo DISPLAY=:0 /usr/bin/kppp
    exit 0
fi

Reload udev:

root@pcxthinkslack:~# /etc/rc.d/rc.udev reload

To test if the rules if fine use this cmd:

root@pcxthinkslack:~#  udevadm test /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.1/1-1.1:1.0/ttyUSB0/tty/ttyUSB0

Last test it in the real world, plug-in the modem, voila… kppp is showed up :)

Ref:
- Udev at Arch Wiki