#!/bin/sh

# NOTE: since mdev -s only provide $MDEV, don't depend on any hotplug vars.

current=$(readlink usbdisk)

if [ "${current}" = "${MDEV}" ] && [ "${ACTION}" = "remove" ]; then
	rm -f usbdisk usba1 
fi
[ -n "${current}" ] && exit

if [ -e /sys/block/"${MDEV}" ]; then
	SYSDEV=$(readlink -f /sys/block/"${MDEV}"/device)
	# if /sys device path contains '/usb[0-9]' then we assume its usb
	# also, if it's a usb without partitions we require FAT
	if [ "${SYSDEV##*/usb[0-9]}" != "${SYSDEV}" ]; then
		# do not create link if there is not FAT
		dd if=/dev/"${MDEV}" bs=512 count=1 2>/dev/null | strings | grep FAT >/dev/null || exit 0

		ln -sf "${MDEV}" usbdisk
		# keep this for compat. people have it in fstab
		ln -sf "${MDEV}" usba1
	fi

else
	for i in /sys/block/*/"${MDEV}"; do
		if [ -e "$i" ]; then
			PARENT=$(dirname "$i")
			SYSDEV=$(readlink -f "${PARENT}"/device)
			if [ "${SYSDEV##*/usb[0-9]}" != "${SYSDEV}" ]; then
				ln -sf "${MDEV}" usbdisk
				# keep this for compat. people have it in fstab
				ln -sf "${MDEV}" usba1
			fi
		fi
	done
fi