SD卡分區腳本

ＳＤ卡分區腳本：

#!/bin/sh

# partition size in MB

BOOT_ROM_SIZE=10

SYSTEM_ROM_SIZE=300

DATA_SIZE=200

CACHE_SIZE=100

RECOVERY_ROM_SIZE=20

help() {

bn=`basename $0`

cat << EOF

usage $bn <option> device_node

options:

  -h                displays this help message

  -s                only get partition size

EOF

}

# check the if root?

userid=`id -u`

if [ $userid -ne "0" ]; then

    echo "you're not root?"

    exit

fi

# parse command line

moreoptions=1

node="na"

cal_only=0

while [ "$moreoptions" = 1 -a $# -gt 0 ]; do

    case $1 in

        -h) help; exit ;;

        -s) cal_only=1 ;;

        *)  moreoptions=0; node=$1 ;;

    esac

    [ "$moreoptions" = 0 ] && [ $# -gt 1 ] && help && exit

    [ "$moreoptions" = 1 ] && shift

done

if [ ! -e ${node} ]; then

    help

    exit

fi

# call sfdisk to create partition table

# get total card size

total_size=`sfdisk -s ${node}`

total_size=`expr ${total_size} / 1024`

rom_size=`expr ${BOOT_ROM_SIZE} + ${SYSTEM_ROM_SIZE} + ${DATA_SIZE}`

rom_size=`expr ${rom_size} + ${CACHE_SIZE} + ${RECOVERY_ROM_SIZE}`

bvfat_size=`expr ${total_size} - ${rom_size} - 20 `

vfat_size=`expr ${total_size} - ${rom_size} - 20 - 20 `

system_start=`expr ${BOOT_ROM_SIZE} + ${vfat_size} + 1`

extend_start=`expr ${system_start} + ${SYSTEM_ROM_SIZE} + 1`

extend_size=`expr ${DATA_SIZE} + ${CACHE_SIZE} + 8`

recovery_start=`expr ${extend_start} + ${extend_size} + 1`

data_start=`expr ${extend_start} + 1`

cache_start=`expr ${data_start} + ${DATA_SIZE} + 3`

# create partitions

if [ "${cal_only}" -eq "1" ]; then

cat << EOF

VFAT   : ${vfat_size}MB

SYSTEM : ${SYSTEM_ROM_SIZE}MB

RECO   : ${RECOVERY_ROM_SIZE}MB

DATA   : ${DATA_SIZE}MB

CACHE  : ${CACHE_SIZE}MB

EOF

exit

fi

# destroy the partition table

dd if=/dev/zero of=${node} bs=1024 count=1

sfdisk --force -uM ${node} << EOF

,${bvfat_size},b

,${SYSTEM_ROM_SIZE},83

,${extend_size},5

,${RECOVERY_ROM_SIZE},83

,${DATA_SIZE},83

,${CACHE_SIZE},83

EOF

# Leave bootloader space.

sfdisk --force -uM ${node} -N1 << EOF

${BOOT_ROM_SIZE},${vfat_size},b

EOF

# format the SDCARD/DATA/CACHE partition

part=""

echo ${node} | grep mmcblk > /dev/null

if [ "$?" -eq "0" ]; then

    part="p"

fi