device-hook

#!/bin/sh
# gpsd device-hook script for Sierra Wireless cards, by Jenny Danzmayr, based on Bjørn Mork script
#
# gpsd will not poll a device before it is opened, at which time this script is called
# This means that we can unconditionally add the GPS inteface to gpsd without wasting any power.
# It will be activated when the first client connects to gpsd, and this script is called
#
# gpsd will also deactivate the port after some inactivity period

# figure out the parent usb device
GPSDEVICE="$(readlink -f "$1")"
USBDEV=`ls -l "$GPSDEVICE" |sed -ne 's!^c......... [0-9]* [^ ]* [^ ]* \([0-9]*\), \([0-9]*\) .*!/sys/dev/char/\1:\2/device/../..!p'`

#echo "$GPSDEVICE -> $USBDEV"
# silently ignore any non-USB ports
if [ ! -r "$USBDEV/idVendor" ] || [ ! -r "$USBDEV/idProduct" ]; then
  exit 0
fi 

VID=`cat "$USBDEV/idVendor"`
PID=`cat "$USBDEV/idProduct"`

case "$2" in
  ACTIVATE)
    CMD=START
    ;;
  *)
    CMD=STOP
    ;;
esac

case "$VID:$PID" in
  "1199:9071" |\
  "1199:9079" )
    echo "sending command \$GPS_${CMD} to $GPSDEVICE" >&2
    echo \$GPS_$CMD >"$GPSDEVICE"
    ;;
  *)
    ;;
esac

exit 0