本文说明利用shell脚本实现linux系统上电自动检测emmc的一种方法。不需要人工去配置emmc，提升工作效率。

该脚本已经在海思平台HI3516CV300验证可行。

#!/bin/sh

#1.Determines whether the /data directory is mounted

echo "Determines whether the /data directory is mounted"

if mountpoint -q /data

then

echo "The /data directory has been mounted,will exit the shell"

exit

else

echo "The /data directory not mounted"

fi

#2.Determine if /dev/mmcblk0p1 exists. If so, try mount it first

echo "Determine if /dev/mmcblk0p1 exists. If so, try mount it first"

if [ -e '/dev/mmcblk0p1' ]

then

echo "/dev/mmcblk0p1 already exist!"

echo "do- mount /dev/mmcblk0p1 /data"

mount /dev/mmcblk0p1 /data

if [ "$?" = 0 ]

then

echo "mount /dev/mmcblk0p1 /data successful!!!"

else

echo "first mount failed,then do- mkfs.vfat  -I  /dev/mmcblk0p1"

mkfs.vfat  -I  /dev/mmcblk0p1

echo "do- mount /dev/mmcblk0p1 /data"

mount /dev/mmcblk0p1 /data

fi

exit

fi

#3.Partition the disk at /dev/mmcblk0

echo "Partition the disk at /dev/mmcblk0"

echo "First enter: n"

echo "Second enter: p"

echo "Third enter: 1"

echo "Fourth enter: 1"

echo "Five enter 120832"

echo "Six enter w"

fdisk  /dev/mmcblk0 << EOF

n

p

1

1

120832

w

EOF

if [ "$?" = 0 ]

then

if [ -e '/dev/mmcblk0p1' ]

then

echo "/dev/mmcblk0p1 exist!"

else

echo "/dev/mmcblk0p1 not exist!!!"

fi

else

echo "The fdisk command failed"

exit

fi

#4.Format the partition /dev/mmcblk0p1 and mount

echo "Format the partition /dev/mmcblk0p1 and mount"

echo "do-- mkfs.vfat  -I  /dev/mmcblk0p1"

mkfs.vfat  -I  /dev/mmcblk0p1

echo "do-- mount /dev/mmcblk0p1 /data"

mount /dev/mmcblk0p1 /data