#!/bin/bash

SDCARD=/dev/sdcard
DEF_UID=$(grep "^UID_MIN" /etc/login.defs |  tr -s " " | cut -d " " -f2)
DEF_GID=$(grep "^GID_MIN" /etc/login.defs |  tr -s " " | cut -d " " -f2)
DEVICEUSER=$(getent passwd $DEF_UID | sed 's/:.*//')
MNT=/run/user/$DEF_UID/media/sdcard

if [ "$ACTION" = "add" ]; then
	if [ -b /dev/mmcblk1p1 ]; then
		ln -sf /dev/mmcblk1p1 $SDCARD
	elif [ -b /dev/mmcblk1 ]; then
		ln -sf /dev/mmcblk1 $SDCARD
	else
		exit $?
	fi
	su $DEVICEUSER -c "mkdir -p $MNT"
  mount $SDCARD $MNT
  mount -o bind ${MNT}/.home /home/nemo
  mount -o bind ${MNT}/.android /data/sdcard
else
  umount /data/sdcard
  umount /home/nemo
	umount $SDCARD

	if [ $? = 0 ]; then
		rm -f $SDCARD
	else
		umount -l $MNT
		rm -f $SDCARD
	fi
fi

[nemo@localhost ~]$ df -h
Filesystem            Size  Used Avail Use% Mounted on
rootfs                 14G  4.1G  9.2G  31% /
/dev/mmcblk0p28        14G  4.1G  9.2G  31% /
devtmpfs              406M   64K  406M   1% /dev
tmpfs                 407M   72K  407M   1% /dev/shm
tmpfs                 407M   20M  387M   5% /run
tmpfs                 407M     0  407M   0% /sys/fs/cgroup
tmpfs                 407M  8.0K  407M   1% /tmp
/dev/mmcblk0p25       8.0M  4.2M  3.8M  54% /persist
/dev/mmcblk0p18        64M   45M   20M  70% /firmware
/dev/mmcblk0p19       8.0M  4.1M  3.9M  52% /drm
/dev/mmcblk0p28        14G  4.1G  9.2G  31% /swap
/dev/mmcblk0p28        14G  4.1G  9.2G  31% /home
/dev/mmcblk0p9         48M  6.6M   41M  14% /var/systemlog
tmpfs                 407M     0  407M   0% /mnt/asec
tmpfs                 407M     0  407M   0% /mnt/obb
/dev/mmcblk1p1         60G  2.6G   54G   5% /run/user/100000/media/sdcard
/dev/mmcblk1p1         60G  2.6G   54G   5% /home/nemo
/dev/mmcblk1p1         60G  2.6G   54G   5% /data/sdcard