#!/system/bin/sh
cd /tmp/otgmod

# add usbdisk support to ramdisk
echo Unpacking ramdisk...
dd if=/dev/block/platform/msm_sdcc.1/by-name/boot of=boot.img
chmod 755 unpackbootimg
./unpackbootimg -i boot.img
mkdir ramdisk
cd ramdisk
gzip -dc ../boot.img-ramdisk.gz | cpio -i
if ! ( grep -q usbdisk fstab.mako ); then
	echo Modifying ramdisk...
	echo "/devices/platform/msm_hsusb_host/usb2 /storage/usbdisk0 auto defaults voldmanaged=usbdisk:auto" >> fstab.mako

	sed '/symlink \/mnt\/shell\/emulated\/0 \/storage\/emulated\/legacy/ a\
\
    # USB storage -ziddey\
    mkdir \/storage\/usbdisk0 0000 system system\
    export SECONDARY_STORAGE /storage/usbdisk0\
    symlink \/storage\/usbdisk0 \/usbdisk\
    symlink \/storage\/usbdisk0 \/mnt\/usbdisk' -i init.mako.rc

	find . | cpio --create --format='newc' | gzip > ../newboot.img-ramdisk.gz
	cd ..

	echo \#!/sbin/sh > createnewboot.sh
	echo ./mkbootimg --kernel boot.img-zImage --ramdisk newboot.img-ramdisk.gz --cmdline \"$(cat boot.img-cmdline)\" --base 0x$(cat boot.img-base) --pagesize 2048 --ramdiskaddr 0x81800000 --output newboot.img >> createnewboot.sh
	chmod 755 createnewboot.sh
	chmod 755 mkbootimg
	./createnewboot.sh

	echo Flashing ramdisk...
	dd if=newboot.img of=/dev/block/platform/msm_sdcc.1/by-name/boot
else
	cd ..
fi

# allow play store apps that require usb host
if ! ( grep -q ro.usb.host=1 /system/build.prop ); then
	echo Modifying /system/build.prop...
	echo ro.usb.host=1 >> /system/build.prop
fi

# workaround to allow app writing to usb drives
if ! [ -f /system/etc/permissions/platform.xml.1 ]; then
	echo Creating backup /system/etc/permissions/platform.xml.1...
	cp /system/etc/permissions/platform.xml /system/etc/permissions/platform.xml.1
	echo Modifying /system/etc/permissions/platform.xml...
	sed -e '/WRITE_EXTERNAL_STORAGE" >$/N;s/\n\(\([ \t]*\)<group gid="sdcard_rw".*$\)/\n\2<group gid="media_rw" \/>\n\1/' -i /system/etc/permissions/platform.xml
fi

# cleanup
cd ..
rm -rf otgmod

exit 0