driver/swap_driver.sh

   1 #!/bin/sh
   2
   3
   4 # name of the file with module
   5 MODULE_FILE=swap_driver
   6
   7 # device name
   8 DEVICE=__DEV_NAME__
   9
  10 # name of device visible in /proc/devices
  11 DEVICE_NAME=${DEVICE}
  12
  13 # name of the device
  14 DEVICE_FILE=__DEV_DIR__/${DEVICE}
  15
  16 MAJOR=`sed "/${DEVICE_NAME}/ ! d" /proc/devices | sed "s/ ${DEVICE_NAME}//"`
  17 if [ "${MAJOR}" != "" ] ; then
  18     echo "SWAP Driver is already loaded!"
  19     exit 1
  20     rmmod ${MODULE_FILE}
  21     MAJOR=`sed "/${DEVICE_NAME}/ ! d" /proc/devices | sed "s/ ${DEVICE_NAME}//"`
  22     if [ "${MAJOR}" != "" ] ; then
  23         echo "Error: Unable to unload driver module '${MODULE_FILE}'"
  24         exit 1
  25     fi
  26 fi
  27
  28 # load driver module
  29 echo "loading module '${MODULE_FILE}'"
  30 ./bin/insmod.sh ${MODULE_FILE}.ko device_name=${DEVICE_NAME}
  31 if [ $? -ne 0 ]; then
  32     echo "Error: Unable to load Swap Driver!"
  33     exit 1
  34 fi
  35
  36 MAJOR=`sed "/${DEVICE_NAME}/ ! d" /proc/devices | sed "s/ ${DEVICE_NAME}//"`
  37 DEVICE_MAJOR=${MAJOR}
  38 if [ ! -c ${DEVICE_FILE} ] ; then
  39         echo "WARNING: Creating device node with major number [${DEVICE_MAJOR}]!"
  40         mknod ${DEVICE_FILE} c ${DEVICE_MAJOR} 0
  41         if [ $? -ne 0 ]; then
  42             echo "Error: Unable to create device node!"
  43             exit 1
  44         fi
  45         chmod a+r ${DEVICE_FILE}
  46 fi