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 DEVICE_MAJOR=__DEV_MAJOR__
  10
  11 # name of device visible in /proc/devices
  12 DEVICE_NAME=${DEVICE}
  13
  14 # name of the device
  15 DEVICE_FILE=__DEV_DIR__/${DEVICE}
  16
  17 MAJOR=`sed "/${DEVICE_NAME}/ ! d" /proc/devices | sed "s/ ${DEVICE_NAME}//"`
  18 if [ "${MAJOR}" != "" ] ; then
  19     echo "SWAP Driver is already loaded!"
  20     exit 1
  21     rmmod ${MODULE_FILE}
  22     MAJOR=`sed "/${DEVICE_NAME}/ ! d" /proc/devices | sed "s/ ${DEVICE_NAME}//"`
  23     if [ "${MAJOR}" != "" ] ; then
  24         echo "Error: Unable to unload driver module '${MODULE_FILE}'"
  25         exit 1
  26     fi
  27 fi
  28
  29 if [ ! -c ${DEVICE_FILE} ] ; then
  30         echo "WARNING: Creating device node with major number [${DEVICE_MAJOR}]!"
  31         mknod ${DEVICE_FILE} c ${DEVICE_MAJOR} 0
  32         if [ $? -ne 0 ]; then
  33             echo "Error: Unable to create device node!"
  34             exit 1
  35         fi
  36         chmod a+r ${DEVICE_FILE}
  37 else
  38         # stat is better, but DTV doesn't have stat
  39         DEVICE_MAJOR=`ls -l ${DEVICE_FILE} | awk '{sub(/,/,"",$5); print $5}'`
  40 fi
  41
  42 # load driver module
  43 echo "loading module '${MODULE_FILE}'"
  44 ./bin/insmod.sh ${MODULE_FILE}.ko device_name=${DEVICE_NAME} device_major=${DEVICE_MAJOR}
  45 if [ $? -ne 0 ]; then
  46     echo "Error: Unable to load Swap Driver!"
  47     exit 1
  48 fi
  49 MAJOR=`sed "/${DEVICE_NAME}/ ! d" /proc/devices | sed "s/ ${DEVICE_NAME}//"`
  50