#!/bin/bash

CONFIG="/etc/crypto/crypto.conf"
NR="`grep NR_OF_DISKS $CONFIG |sed 's/NR_OF_DISKS=//'`"
USBISIN="NO"
dm=/sbin/dmsetup
cr=/sbin/cryptsetup 



for (( i =1 ; i <= "$NR" ; i++ ))
	do
	## all variables should go here
	usb_vendor=`sed -n "/<$i/,/>$i/p" "$CONFIG" | grep "usb_vendor=" | sed 's/usb_vendor=//'`
	usbmountpoint=`sed -n "/<$i/,/>$i/p" "$CONFIG" | grep "usbmountpoint=" | sed 's/usbmountpoint=//'`
	usbfs=`sed -n "/<$i/,/>$i/p" "$CONFIG" | grep "usbfs=" | sed 's/usbfs=//'`
	cryptohd=`sed -n "/<$i/,/>$i/p" "$CONFIG" | grep "cryptohd=" | sed 's/cryptohd=//'`
	fsocd=`sed -n "/<$i/,/>$i/p" "$CONFIG" | grep "fsocd=" | sed 's/fsocd=//'`
	mappername=`sed -n "/<$i/,/>$i/p" "$CONFIG" | grep "mappername=" | sed 's/mappername=//'`
	mapperdev=`sed -n "/<$i/,/>$i/p" "$CONFIG" | grep "mapperdev=" | sed 's/mapperdev=//'`
	hdmountpoint=`sed -n "/<$i/,/>$i/p" "$CONFIG" | grep "hdmountpoint=" | sed 's/hdmountpoint=//'`
	nameof_keyfile=`sed -n "/<$i/,/>$i/p" "$CONFIG" | grep "nameof_keyfile=" | sed 's/nameof_keyfile=//'`
	chiper=`sed -n "/<$i/,/>$i/p" "$CONFIG" | grep "chiper=" | sed 's/chiper=//'`
	


	if [[ "$USBISIN" = "NO" ]]
	    then echo "RUNNING USBCHECK"
		while (x=0)
			do let x++ 
			sleep 1	
			## well we will wait no more than 20 sec.. if not pluged in by then exit..
			if [[ "$x" == "25" ]] 
				then echo -e "\n * you better find that usbstick.." && exit 0
			fi	
			## when this returns 1 the kernel has read the device..  
			## therfor this must be in the while loop so the variable 
			## usbdev can be updated on each loop.. 
			## this can |must be changed if you got a static device.. i dont not..
			usbdev="`egrep "(sda1|sdb1|sdc1|sdd1)" /proc/partitions |awk '{print $4}'`"
			
			## A little prechek.. check if the usb device is in mtab but not pluged in.. i can happen :) 
			## trust me just rip it out and its still be shown as mounted.. just try yourself.. look in df
			if [[ `df |grep -c "$usbmountpoint"` -eq "1" ]] && [[ $(lsusb | grep -c "${usb_vendor}") -eq "0" ]]
				## just remove it and lets continue			df
 				then umount -f ${usbmountpoint} ; break
			fi
			## Lets see if the usb device is pluged in,, read by the kernel and mounted already..
			if [ $usbdev > /dev/null ] && [ $(lsusb |grep -c "${usb_vendor}") == "1" ] && [[ "`df |grep -c "$usbmountpoint"`" -eq "1" ]]
				then USBISIN="YES"
				break
			fi
			## Lets see if the usb device is pluged in,, read by the kernel and not mounted.. 
			if [ $usbdev > /dev/null ] && [ $(lsusb |grep -c "${usb_vendor}") == "1" ] && [[ "`df |grep -c "$usbmountpoint"`" -eq "0" ]]
				then mount -t "$usbfs" "/dev/$usbdev" "$usbmountpoint" 
				USBISIN="YES"
				break 
			fi

		done
			
			
	fi
		
	## Alright.. now we are ready to make the mappers.. if this is true
	if [[ "$USBISIN"  == "YES" ]] && [[ -f "$usbmountpoint/$nameof_keyfile" ]]
		then if [[ ! -e ${mapperdev} ]] && [[ `df | grep -c "${mapperdev}"` == "0" ]]
        		#make the mapper
			then echo "making mapper $mapperdev"
			$cr -c $chiper -d $usbmountpoint/$nameof_keyfile create $mappername $cryptohd &&
			fsck -t $fsocd -T -C -y "$mapperdev" 
        		if [[ "$?" != "0" ]] || [[ "$?" != "1" ]]
				then exit 1 ;
			fi
			mount -t "${fsocd}" "${mapperdev}" "${hdmountpoint}"
	
		## If no mapper in dev  but mounted ; bad stuff can happen
		elif [[ ! -e ${mapperdev} ]] && [[ `df |grep -c "${mapperdev}"` == "1" ]]
        		then echo "umounting and making new mapper + mounting mapper"
			umount -l -r -f ${mountpoint} || echo "crap.. try lsof ${hdmountpoint} and kill all thouse pid's" & exit 1;
			$cr -c $chiper -d $usbmountpoint/$nameof_keyfile create $mappername $cryptohd &
        		fsck -t $fsocd -T -C -y "$mapperdev" 
			if [[ "$?" != "0" ]] || [[ "$?" != "1" ]]
				then exit 1 ;
			fi
        		mount -t "${fsocd}" "${mapperdev}" "${hdmountpoint}"

		## If mapper exsits but its not mounted..  remove it and make a new..
		elif [[ -e "${mapperdev}" ]] && [[ `df |grep -c "${mapperdev}"` == "0" ]]
			then echo "removing old mapper.. making new mapper + mounting $mapperdev"
			${dm} remove ${mappername} &&
			$cr -c $chiper -d $usbmountpoint/$nameof_keyfile create $mappername $cryptohd &&
			fsck -t $fsocd -T -C -y "$mapperdev"
        		if [[ "$?" != "0" ]] || [[ "$?" != "1" ]]
				then exit 1 ;
			fi
        		mount -t "${fsocd}" "${mapperdev}" "${hdmountpoint}"
		
		## if mounted and all well just exit,,
		elif [[ -e "${mapperdev}" ]] && [[ `df |grep -c "${mapperdev}"` == "1" ]]
        		then echo " *** DEVICE $mapperdev Is already mounted"

		fi

    	fi

done