SD卡分区脚本

ＳＤ卡分区脚本：

#!/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