#!/bin/bash
#TODO: get backend code out of here!!


# check if a worker has completed successfully. if not -> tell user he must do it + return 1
# if ok -> don't warn anything and return 0
check_depend ()
{
	[ -z "$1" -o -z "$2" ] && die_error "Use the check_depend function like this: check_depend <type> <name> with type=phase/worker"
	[ "$1" != phase -a "$1" != worker ] && die_error "check_depend's first argument must be a valid type (phase/worker)"

	ended_ok $1 $2 && return 0
	subject="$1 $2"
	title=$1_$2_title
	[ -n "${!title}" ] && subject="'${!title}'"
	show_warning "Cannot Continue.  Going back to $2" "You must do $subject first before going here!." && return 1
}


prefill_configs () {
	#TODO: only need to do this once.  check 'ended_ok worker configure_system' is not good because this could be done already even if worker did not exit 0
	# /etc/pacman.d/mirrorlist
	# add installer-selected mirror to the top of the mirrorlist
	if [ "$var_PKG_SOURCE_TYPE" = "net" -a -n "${var_SYNC_URL}" ]; then
		debug 'PROCEDURE' "Adding choosen mirror (${var_SYNC_URL}) to ${var_TARGET_DIR}/$var_MIRRORLIST"
		mirrorlist=`awk "BEGIN { printf(\"# Mirror used during installation\nServer = "${var_SYNC_URL}"\n\n\") } 1 " "${var_TARGET_DIR}/$var_MIRRORLIST"`
		echo "$mirrorlist" > "${var_TARGET_DIR}/$var_MIRRORLIST"
	fi

	# /etc/rc.conf
	# Make sure timezone and utc info are what we want
	# NOTE: If a timezone string never contains more then 1 slash, we can use ${TIMEZONE/\//\\/}
	sed -i -e "s/^TIMEZONE=.*/TIMEZONE=\"${TIMEZONE//\//\\/}\"/g" \
	-e "s/^HARDWARECLOCK=.*/HARDWARECLOCK=\"$HARDWARECLOCK\"/g" \
	${var_TARGET_DIR}/etc/rc.conf

	# Give initcpio the encrypt hook when / depends on an encrypted volume
	# (other encrypted volumes, not related to / don't need the encrypt hook, afaik)
	# If / also depends on lvm, this way the lvm2 hook will also be included in the right place
	if get_anchestors_mount ';/;'
	then
		hooks=`echo "$ANSWER_DEVICES" | cut -d ' ' -f2 | egrep 'lvm-lv|dm_crypt' | sed -e 's/lvm-lv/lvm2/' -e 's/dm_crypt/encrypt/' | tac`
		hooks=`echo $hooks`
		[ -n "$hooks" ] && sed -i "/^HOOKS/ s/filesystems/$hooks filesystems/" ${var_TARGET_DIR}/etc/mkinitcpio.conf
	fi
	# The lvm2 hook however is needed for any lvm LV, no matter the involved mountpoints, so include it if we still need to
	if grep -q lvm-lv $TMP_BLOCKDEVICES && ! grep -q '^HOOKS.*lvm2'  ${var_TARGET_DIR}/etc/mkinitcpio.conf
	then
		sed -i "/^HOOKS/ s/filesystems/lvm2 filesystems/" ${var_TARGET_DIR}/etc/mkinitcpio.conf
	fi

	# if keymap/usbinput are not in mkinitcpio.conf, but encrypt is, we should probably add it
	if line=`grep '^HOOKS.*encrypt' ${var_TARGET_DIR}/etc/mkinitcpio.conf`
	then
		if ! echo "$line" | grep -q keymap
		then
			sed -i '/^HOOKS/ s/encrypt/keymap encrypt/' ${var_TARGET_DIR}/etc/mkinitcpio.conf
		fi
		if ! echo "$line" | grep -q usbinput
		then
			sed -i '/^HOOKS/ s/keymap/usbinput keymap/' ${var_TARGET_DIR}/etc/mkinitcpio.conf
		fi
	fi
	# TODO: we should probably update /etc/crypttab if the user has non-/ encrypted disks.
}

interactive_configure_system()
{
	if [ -z "$EDITOR" ]
	then
		interactive_get_editor || return 1
	fi
	FILE=""

	prefill_configs

	# main menu loop
	while true; do
		DEFAULT=no
		[ -n "$FILE" ] &&  DEFAULT="$FILE"
		helptext="\nNote that if you want to change any file not listed here (unlikely) you can go to another tty and update ${var_TARGET_DIR}/etc/<filename> yourself"
		grep -q '^/dev/mapper' $TMP_FSTAB && helptext="$helptext\n/dev/mapper/ users: Pay attention to HOOKS in mkinitcpio.conf"
		grep -q dm_crypt $TMP_BLOCKDEVICES && crypt="/etc/crypttab Encryption_settings_for_non-root_encrypted_disks" # this simple grep will give some false positives. but oh well.
		ask_option $DEFAULT "Configuration" "$helptext" required $crypt \
		"/etc/rc.conf"                  "System Config" \
		"/etc/fstab"                    "Filesystem Mountpoints" \
		"/etc/mkinitcpio.conf"          "Initramfs Config" \
		"/etc/modprobe.d/modprobe.conf" "Kernel Modules" \
		"/etc/resolv.conf"              "DNS Servers" \
		"/etc/hosts"                    "Network Hosts" \
		"/etc/hosts.deny"               "Denied Network Services" \
		"/etc/hosts.allow"              "Allowed Network Services" \
		"/etc/locale.gen"               "Glibc Locales" \
		"/etc/pacman.conf"              "Pacman.conf" \
		"$var_MIRRORLIST"               "Pacman Mirror List" \
		"Root-Password"                 "Set the root password" \
		"Done"                          "Return to Main Menu" || return 1
		FILE=$ANSWER_OPTION

		if [ "$FILE" = "Done" ]; then       # exit
			break
		elif [ "$FILE" = "Root-Password" ]; then            # non-file
			while true; do
				chroot ${var_TARGET_DIR} passwd root && break
			done
		else                                                #regular file
			$EDITOR ${var_TARGET_DIR}${FILE}
		fi

		# if user edited /etc/rc.conf, add the hostname to /etc/hosts if it's not already there.
		# note that if the user edits rc.conf several times to change the hostname more then once, we will add them all to /etc/hosts.  this is not perfect, but to avoid this, too much code would be required (feel free to prove me wrong :))
		# we could maybe do this just once after the user is really done here, but then he doesn't get to see the updated file while being in this menu...
		if [ "$FILE" = "/etc/rc.conf" ]
		then
			HOSTNAME=`sed -n '/^HOSTNAME/s/HOSTNAME=//p' ${var_TARGET_DIR}${FILE} | sed 's/"//g'`
			if ! grep '127\.0\.0\.1' ${var_TARGET_DIR}/etc/hosts | grep -q "$HOSTNAME"
			then
				sed -i "s/127\.0\.0\.1.*/& $HOSTNAME/" ${var_TARGET_DIR}/etc/hosts
			fi
		fi
	done

	# temporary backup files are not useful anymore past this point.
	find "${var_TARGET_DIR}/etc/" -name '*~' -delete &>/dev/null
	return 0
}


interactive_timezone () {
	ask_timezone || return 1
        TIMEZONE=$ANSWER_TIMEZONE
        inform "Setting Timezone to $TIMEZONE"
		if [ -n "$TIMEZONE" -a -e "/usr/share/zoneinfo/$TIMEZONE" ]
		then
			# This changes probably also the systemtime (UTC->$TIMEZONE)!
			# localtime users will have a false time after that!
			/bin/rm -f /etc/localtime
			/bin/cp "/usr/share/zoneinfo/$TIMEZONE" /etc/localtime
		fi
}


interactive_time () {
        # utc or localtime?
        ask_option UTC "Clock configuration" "Is your hardware clock in UTC or local time? UTC is recommended" required "UTC" " " "localtime" " " || return 1
        HARDWARECLOCK=$ANSWER_OPTION
		# To avoid a false time for localtime users after above
		# we must re-read the hwclock value again, but now into the
		# correct timezone.
		[ "$HARDWARECLOCK" == "localtime" ] && dohwclock $HARDWARECLOCK hctosys

	NEXTITEM=
        while true; do
		current=$(date)
                default=no
                [ -n "$NEXTITEM" ] && default="$NEXTITEM"
                #TODO: only propose if network ok
                EXTRA=()
		type ntpdate &>/dev/null && EXTRA=('ntp' 'Set time and date using ntp')

                ask_option $default "Date/time configuration" "According to your settings and your hardwareclock, the date should now be $current.  If this is incorrect, you can correct this now" required \
                "return" "Looks good. back to main menu" "${EXTRA[@]}" "manual" "Set time and date manually" || return 1
                if [ "$ANSWER_OPTION" = ntp ]
                then
			inform "Syncing clock with internet pool ..."
			if ntpdate pool.ntp.org >/dev/null
			then
				notify "Synced clock with internet pool successfully."
				dohwclock $HARDWARECLOCK systohc && NEXTITEM=3
			else
				show_warning 'Ntp failure' "An error has occured, time was not changed!"
			fi
		fi
		if [ "$ANSWER_OPTION" = manual ]
		then
			ask_datetime || continue
			if date -s "$ANSWER_DATETIME"
			then
				dohwclock $HARDWARECLOCK systohc && NEXTITEM=3
			else
				show_warning "Date/time setting failed" "Something went wrong when doing date -s $ANSWER_DATETIME" 
			fi
		fi
                [ "$ANSWER_OPTION" = return ] && break
        done
}


interactive_prepare_disks ()
{
	DONE=0
	local ret=1 # 1 means unsuccessful. 0 for ok
	NEXTITEM=
	DISK_CONFIG_TYPE=
	[ "$BLOCK_ROLLBACK_USELESS" = "0" ] && show_warning "Rollback may be needed" "It seems you already went here.  You should probably rollback previous changes before reformatting, otherwise stuff will probably fail"
	while [ "$DONE" = "0" ]
	do
		rollbackstr=" (you don't need to do this)"
		[ "$BLOCK_ROLLBACK_USELESS" = "0" ] && rollbackstr=" (this will revert your last changes)"
		default=no
		[ -n "$NEXTITEM" ] && default="$NEXTITEM"

		#TODO: inform user (using dialog's --item-help or so) that autoprepare uses 1 disk and uses it in a "fairly regular" (though somewhat customizable) manner.
		ask_option $default "Prepare Hard Drive" '' required \
			"1" "Auto-Prepare (erases an ENTIRE hard drive and sets up partitions, filesystems and mountpoints)" \
			"2" "Manually Partition Hard Drives" \
			"3" "Manually Configure block devices, filesystems and mountpoints" \
			"4" "Rollback last filesystem changes$rollbackstr" \
			"5" "Return to Main Menu" || return 1

		case $ANSWER_OPTION in
			"1")
				[ "$BLOCK_ROLLBACK_USELESS" = "0" ] && ask_yesno "You should probably rollback your last changes first, otherwise this will probably fail.  Go back to menu to do rollback?" && NEXTITEM=4 && continue
				interactive_autoprepare && NEXTITEM=5 && ret=0 && DISK_CONFIG_TYPE=auto;; #TODO: for some reason. if this completes $?=0, next item will be 1 :/
			"2")
				[ "$BLOCK_ROLLBACK_USELESS" = "0" ] && ask_yesno "You should probably rollback your last changes first, otherwise this will probably fail.  Go back to menu to do rollback?" && NEXTITEM=4 && continue
				interactive_partition && ret=1 && NEXTITEM=3 && DISK_CONFIG_TYPE=manual
				;;
			"3")
				[ "$BLOCK_ROLLBACK_USELESS" = "0" ] && ask_yesno "You should probably rollback your last changes first, otherwise this will probably fail.  Go back to menu to do rollback?" && NEXTITEM=4 && continue
				PARTFINISH=""
				interactive_filesystems && ret=0 && NEXTITEM=5 && DISK_CONFIG_TYPE=manual
				;;
			"4")
				if [ "$BLOCK_ROLLBACK_USELESS" = "1" ]
				then
					ask_yesno "It seems like you haven't partitioned/formatted/mounted anything yet (or rolled back already).  This operation is useless (unless the installer is buggy), but it doesn't harm.  Do you want to continue?" || NEXTITEM=5
				fi
				if [ $? -eq 0 -o "$BLOCK_ROLLBACK_USELESS" = "0" ]
				then
					if rollback_filesystems #TODO: this part doesn't belong here. move it to ui-interactive. (interactive_rollback)
					then
						inform "Rollback succeeded"
					else
						show_warning "Rollback failed" "Rollback failed"
					fi
				fi
				;;
			"5")
				DONE=1 ;;
		esac
	done
	return $ret
}



interactive_autoprepare()
{
	DISCS=$(finddisks)
	if [ $(echo $DISCS | wc -w) -gt 1 ]
	then
		notify "Available Disks:\n\n$(_getavaildisks)\n"
		ask_option no 'Harddrive selection' "Select the hard drive to use" required $(finddisks 1 _) || return 1
		DISC=$ANSWER_OPTION
	elif [ -z "$DISCS" ]; then
            ask_string "Could not find disk. Please enter path of devicefile manually" "" || return 1
            DISC=$ANSWER_STRING
	else
		DISC=$DISCS
	fi
	# TODO : some checks if $DISC is really a blockdevice is probably a good idea
	DISC=${DISC// /} # strip all whitespace.  we need this for some reason.TODO: find out why

	get_blockdevice_size $DISC MiB
	FSOPTS=()
	for fs in ext2 ext3 ext4 reiserfs xfs jfs vfat nilfs2
	do
		check_is_in $fs "${possible_fs[@]}" && FSOPTS+=($fs ${filesystem_names[$fs]})
	done

	ask_number "Enter the size (MiB) of your /boot partition.  Recommended size: 100MiB\n\nDisk space left: $BLOCKDEVICE_SIZE MiB" 16 $BLOCKDEVICE_SIZE 100 || return 1
	BOOT_PART_SIZE=$ANSWER_NUMBER

	BLOCKDEVICE_SIZE=$(($BLOCKDEVICE_SIZE-$BOOT_PART_SIZE))

	ask_number "Enter the size (MiB) of your swap partition.  Recommended size: 256MiB\n\nDisk space left: $BLOCKDEVICE_SIZE MiB" 1 $BLOCKDEVICE_SIZE 256 || return 1
	SWAP_PART_SIZE=$ANSWER_NUMBER

        BLOCKDEVICE_SIZE=$(($BLOCKDEVICE_SIZE-$SWAP_PART_SIZE))

	ROOT_PART_SET=""
	while [ "$ROOT_PART_SET" = "" ]
	do
		ask_number "Enter the size (MiB) of your / partition.  Recommended size:7500.  The /home partition will use the remaining space.\n\nDisk space left:  $BLOCKDEVICE_SIZE MiB" 1 $BLOCKDEVICE_SIZE 7500 || return 1
		ROOT_PART_SIZE=$ANSWER_NUMBER
		ask_yesno "$(($BLOCKDEVICE_SIZE-$ROOT_PART_SIZE)) MiB will be used for your /home partition.  Is this OK?" yes && ROOT_PART_SET=1 #TODO: when doing yes, cli mode prints option JFS all the time, dia mode goes back to disks menu
        done

	ask_option no 'Filesystem selection' "Select a filesystem for / and /home:" required ${FSOPTS[@]} || return 1
	FSTYPE=$ANSWER_OPTION


	echo "$DISC $BOOT_PART_SIZE:ext2:+ $SWAP_PART_SIZE:swap $ROOT_PART_SIZE:$FSTYPE *:$FSTYPE" > $TMP_PARTITIONS

	echo "${DISC}1 raw no_label ext2;yes;/boot;target;no_opts;no_label;no_params"         >  $TMP_BLOCKDEVICES
	echo "${DISC}2 raw no_label swap;yes;no_mountpoint;target;no_opts;no_label;no_params" >> $TMP_BLOCKDEVICES
	echo "${DISC}3 raw no_label $FSTYPE;yes;/;target;no_opts;no_label;no_params"          >> $TMP_BLOCKDEVICES
	echo "${DISC}4 raw no_label $FSTYPE;yes;/home;target;no_opts;no_label;no_params"      >> $TMP_BLOCKDEVICES

	ask_yesno "$DISC will be COMPLETELY ERASED!  Are you absolutely sure?" || return 1

	PART_ACCESS=uuid

	process_disks       || die_error "Something went wrong while partitioning"
	if ! process_filesystems
	then
		show_warning "Filesystem processing" "Something went wrong while processing the filesystems.  Attempting rollback."
		if rollback_filesystems
		then
			show_warning "Filesystem rollback" "Rollback succeeded.  Please try to figure out what went wrong and try me again.  If you found a bug in the installer, please report it."
			return 1
		else
			die_error "Filesystem processing and rollback failed.  Please try the installer again.  If you found a bug in the installer, please report it."
		fi
	else
		notify "Auto-prepare was successful"
		return 0
	fi
}


interactive_partition() {
    target_umountall

	question_text="Select the disk you want to partition"
	if [ -f "$TMP_PARTITIONS" ]
	then
		if ask_yesno "I've detected you already have partition definitions in place:\n`cat $TMP_PARTITIONS`\nDo you want apply these now?  Pick 'no' when in doubt to start from scratch" no
		then
			process_disks || die_error "Something went wrong while partitioning"
			question_text="If you want to do further changes, you can (re)partition disks here"
		fi
	fi

    # Select disk to partition
    DISCS=$(finddisks 1 _)
    DISCS="$DISCS OTHER - DONE +"
    notify "Available Disks:\n\n$(_getavaildisks)\n"
    DISC=""
    while true; do
        # Prompt the user with a list of known disks
        ask_option no 'Disc selection' "$question_text (select DONE when finished)" required $DISCS || return 1
        DISC=$ANSWER_OPTION
        if [ "$DISC" = "OTHER" ]; then
            ask_string "Enter the full path to the device you wish to partition" "/dev/sda" || return 1
            DISC=$ANSWER_STRING
        fi
        # Leave our loop if the user is done partitioning
        [ "$DISC" = "DONE" ] && break
        # Partition disc
        notify "Now you'll be put into the cfdisk program where you can partition your hard drive. You should make a swap partition and as many data partitions as you will need.\
        NOTE: cfdisk may tell you to reboot after creating partitions.  If you need to reboot, just re-enter this install program, skip this step and go on to the mountpoints selection step."
        cfdisk $DISC
    done
    return 0
}


# create new, delete, or edit a filesystem
# At first I had the idea of a menu where all properties of a filesystem and you could pick one to update only that one (eg mountpoint, type etc)\
# but I think it's better to go through them all and by default always show the previous choice.
interactive_filesystem ()
{
	# note: fs_mount: we dont need to ask this to the user. this is always 'target' for 99.99% of the users
	local part=$1       # must be given and (scheduled to become) a valid device -> don't do [ -b "$1" ] because the device might not exist *yet*
	local part_type=$2  # a part should always have a type
	local part_label=$3 # can be empty
	local fs_string=$4  # can be empty
	local fs_type=
	local fs_create
	local fs_mountpoint=
	local fs_mount
	local fs_opts=
	local fs_label=
	local fs_params=
	NEW_FILESYSTEM=
	if [ -n "$fs_string" ]
	then
		parse_filesystem_string "$fs_string" yes
		local old_fs_type=$fs_type
		local old_fs_create=$fs_create
		local old_fs_mountpoint=$fs_mountpoint
		local old_fs_mount=$fs_mount
		local old_fs_opts="$fs_opts"
		local old_fs_label=$fs_label
		local old_fs_params="$fs_params"

		ask_option edit "Change $fs_type filesystem settings on $part ?" \
		                "Change $fs_type filesystem settings (create:$fs_create, label:$fs_label, mountpoint:$fs_mountpoint) on $part (type:$part_type, label:$part_label) ?" required \
		                edit EDIT delete DELETE #TODO: nicer display if label is empty etc

		# Don't alter, and return if user cancels
		[ $? -gt 0 ] && NEW_FILESYSTEM=$fs_string && return 0
		# Erase and return if that's what the user wants
		[ "$ANSWER_OPTION" = delete ] && NEW_FILESYSTEM=no_fs
	fi

	if [ "$NEW_FILESYSTEM" != no_fs ]
	then
		# Determine which filesystems/blockdevices are possible for this blockdevice
		FSOPTS=()
		for fs in ${fs_on[$part_type]}
		do
			check_is_in $fs "${possible_fs[@]}" && FSOPTS+=($fs ${filesystem_names[$fs]})
		done

		fs_create=no
		ask_yesno "Do you want to have this filesystem (re)created ?  If not, make sure there already is a filesystem!" && fs_create=yes

		# determine FS choice
		if [ ${#FSOPTS[*]} -lt 4 ] # less then 4 words in $FSOPTS. eg only one option
		then
			notify "Automatically picked the ${FSOPTS[1]} filesystem.  It's the only option for $part_type blockdevices"
			fs_type=${FSOPTS[0]}
		else
			default=
			[ -n "$fs_type" ] && default="--default-item $fs_type"
			extratext="Select a filesystem for $part:"
			[ "$fs_create" == no ] && extratext="Select which filesystem $part is.  Make sure you get this right" #otherwise he'll be screwed when we try to mount it :)
			ask_option no "Select filesystem" "$extratext" required ${FSOPTS[@]} || return 1
			fs_type=$ANSWER_OPTION
		fi

		# ask mountpoint, if relevant
		if check_is_in $fs_type "${fs_mountable[@]}"
		then
			default=no
			[ -n "$fs_mountpoint" ] && default="$fs_mountpoint"
			ask_option $default "Select the mountpoint" "Select a mountpoint for $part" required / 'root' /boot 'files for booting' /home 'home directories' /var 'variable files' /tmp 'temporary files' custom 'enter a custom mountpoint' || return 1
			fs_mountpoint=$ANSWER_OPTION
			[ "$default" == 'no' ] && default=
			if [ "$ANSWER_OPTION" == custom ]
			then
				ask_string "Enter the custom mountpoint for $part" "$default" && fs_mountpoint=$ANSWER_STRING || return 1
			fi
		fi

		# ask label, if relevant
		if [ "$fs_create" == yes ] && check_is_in "$fs_type" "${fs_label_mandatory[@]}"
		then
			default=
			[ -n "$fs_label" ] && default="$fs_label"
			ask_string "Enter the label/name for this $fs_type on $part (Mandatory for this type of FS!)" "$default" || return 1 #TODO: check that you can't give LV's labels that have been given already or the installer will break.
			fs_label=$ANSWER_STRING
		elif [ "$fs_create" == yes ] && check_is_in "$fs_type" "${fs_label_optional[@]}"
		then
			default=
			[ -n "$fs_label" ] && default="$fs_label"
			ask_string "Enter the label for this $fs_type on $part (optional) [keep it short and don't use spaces]" "$default" 0
			fs_label=${ANSWER_STRING// } # strip spaces to prevent problems in our bash code and to keep things simple.
		fi

		# ask special params, if relevant
                # lvm-vg: PV's to use
                # lvm-lv: LV size
		if [ "$fs_create" == yes ] && [ "$fs_type" = lvm-vg ]
		then
			# add $part to $fs_params if it's not in there because the user wants this enabled by default. TODO: we should find something out so you can't disable $part. (would be weird to have a vg listed on $part and not have $part it fs_params)
			pv=${part/+/}
			if ! egrep -q "$pv(\$| )" <<< "$fs_params"; then
			   [ -n "$fs_params" ] && fs_params="$fs_params "
			   fs_params="$fs_params$pv"
			fi

			list=
			for pv in $fs_params
			do
				list="$list $pv ^ ON"
			done
			for pv in `grep '+ lvm-pv' $TMP_BLOCKDEVICES | awk '{print $1}' | sed 's/\+$//'` # find PV's to be added: their blockdevice ends on + and has lvm-pv as type #TODO: i'm not sure we check which pv's are taken already
			do
				grep -q "$pv ^ ON" <<< "$list" || list="$list $pv - OFF"
			done
			list2=($list)
			if [ ${#list2[*]} -lt 6 ] # less then 6 words in the list. eg only one option
			then
				notify "Automatically picked PV ${list2[0]} to use for this VG.  It's the only available lvm PV"
				fs_params=${list2[0]}
			else
				ask_checklist "Which lvm PV's must this volume group span?" $list || return 1
				fs_params="$ANSWER_CHECKLIST"
			fi
		fi
		if [ "$fs_create" == yes ] && [ "$fs_type" = lvm-lv ]
		then
			[ -z "$fs_params" ] && default='5000'
			[ -n "$fs_params" ] && default="$fs_params"
			ask_number "Enter the size for this $fs_type on $part in MiB" 1 0 "$default" || return 1 #TODO: can we get the upperlimit from somewhere?
			# Lvm tools use binary units but have their own suffixes ( K,M,G,T,P,E, but they mean KiB, MiB etc)
			fs_params="${ANSWER_NUMBER}M"
		fi
		if [ "$fs_create" == yes ] && [ "$fs_type" = dm_crypt ]
		then
			[ -z "$fs_params" ] && default='-c aes-xts-plain -y -s 512'
			[ -n "$fs_params" ] && default="$fs_params"
			ask_string "Enter the options for this $fs_type on $part" "$default" || return 1
			fs_params="$ANSWER_STRING"
		fi

		# ask opts
		if [ "$fs_create" == yes ]
		then
			default=
			[ -n "$fs_opts" ] && default="$fs_opts"
			program="${filesystem_programs[$fs_type]}"
			ask_string "Enter any additional opts for $program" "$default" 0
			fs_opts="$ANSWER_STRING"
		fi

		[ -z "$fs_type"       ] && fs_type=no_type
		[ -z "$fs_mountpoint" ] && fs_mountpoint=no_mountpoint
		[ -z "$fs_opts"       ] && fs_opts=no_opts
		[ -z "$fs_label"      ] && fs_label=no_label
		[ -z "$fs_params"     ] && fs_params=no_params
		NEW_FILESYSTEM="$fs_type;$fs_create;$fs_mountpoint;target;${fs_opts// /__};$fs_label;${fs_params// /__}"

		# add new theoretical blockdevice, if relevant
		# these are just the resulting DM devices,
		# exception for lvm-pv: we create $part+ to represent the PV (+ is to differentiate from $part itself)
		new_device=
		[ "$fs_type" = lvm-vg   ] && new_device="/dev/mapper/$fs_label $fs_type $fs_label"
		[ "$fs_type" = lvm-pv   ] && new_device="$part+ $fs_type no_label"
		[ "$fs_type" = lvm-lv   ] && new_device="/dev/mapper/$part_label-$fs_label $fs_type $fs_label"
		[ "$fs_type" = dm_crypt ] && new_device="/dev/mapper/$fs_label $fs_type no_label"
		[ -n "$new_device" ] && ! grep -q "^$new_device " $TMP_BLOCKDEVICES && echo "$new_device no_fs" >> $TMP_BLOCKDEVICES
	fi

	[ -z "$old_fs_label" ] && old_fs_label=no_label

	# Cascading remove theoretical blockdevice(s), if relevant ( eg if we just changed from vg->ext3, dm_crypt -> fat, or if we changed the label of a FS, causing a name change in a dm_mapper device)
	if [[ $old_fs_type = lvm-* || $old_fs_type = dm_crypt ]] && [ "$NEW_FILESYSTEM" = no_fs -o "$old_fs_type" != "$fs_type" -o "$old_fs_label" != "$fs_label" ]
	then
		[ "$old_fs_type" = lvm-vg   ] && remove_blockdevice "/dev/mapper/$old_fs_label"             "$old_fs_type" "$old_fs_label"
		[ "$old_fs_type" = lvm-pv   ] && remove_blockdevice "$part+"                                "$old_fs_type" "$old_fs_label"
		[ "$old_fs_type" = lvm-lv   ] && remove_blockdevice "/dev/mapper/$part_label-$old_fs_label" "$old_fs_type" "$old_fs_label"
		[ "$old_fs_type" = dm_crypt ] && remove_blockdevice "/dev/mapper/$old_fs_label"             "$old_fs_type" "$old_fs_label"
	fi

	return 0
}


remove_blockdevice ()
{
	local part=$1       # must be given but doesn't need to exist
	local part_type=$2  # a part should always have a type
	local part_label=$3 # must be given

	target="$part $part_type $part_label"
	declare target_escaped=${target//\//\\/} # note: apparently no need to escape the '+' sign for sed.
	declare target_escawk=${target_escaped/+/\\+} # ...but that doesn't count for awk
	fs_string=`awk "/^$target_escawk / { print \$4}" $TMP_BLOCKDEVICES` #TODO: fs_string is the entire line, incl part?
	debug 'UI-INTERACTIVE' "Cleaning up partition $part (type $part_type, label $part_label).  It has the following FS's on it: $fs_string"
	sed -i "/$target_escaped/d" $TMP_BLOCKDEVICES || show_warning "blockdevice removal" "Could not remove partition $part (type $part_type, label $part_label).  This is a bug. please report it"
	for fs in `sed 's/|/ /g' <<< $fs_string`
	do
		fs_type=`       cut -d ';' -f 1 <<< $fs`
		fs_label=`      cut -d ';' -f 6 <<< $fs`
		[ "$fs_type" = lvm-vg   ] && remove_blockdevice "/dev/mapper/$fs_label"             "$fs_type" "$fs_label"
		[ "$fs_type" = lvm-pv   ] && remove_blockdevice "$part+"                            "$fs_type" "$fs_label"
		[ "$fs_type" = lvm-lv   ] && remove_blockdevice "/dev/mapper/$part_label-$fs_label" "$fs_type" "$fs_label"
		[ "$fs_type" = dm_crypt ] && remove_blockdevice "/dev/mapper/$fs_label"             "$fs_type" "$fs_label"
	done
}


interactive_filesystems() {

	renew_blockdevices=1
	if [ -f $TMP_BLOCKDEVICES ]
	then
		if ask_yesno "I've detected you already have blockdevice definitions in place:\n`cat $TMP_BLOCKDEVICES`\nDo you want to use these as a starting point?\nMake sure your disk(s) are partitioned correctly so your definitions can be applied on the disk. Pick 'no' when in doubt to start from scratch" no
		then
			renew_blockdevices=0
		fi
	fi
	[ "$renew_blockdevices" = 1 ] && findblockdevices 0 'no_fs' ' raw no_label' > $TMP_BLOCKDEVICES

	[ -z "$PART_ACCESS" ] && PART_ACCESS=dev
	ask_option $PART_ACCESS 'Partition Access Method' 'How do you want your partitions to be accessed in grubs menu.lst and /etc/fstab?' '' \
		"dev"	"directly by /dev/* (most intuitive but devicefile names can change on kernel updates)" \
		"label"	"by Disk-Label (Will use the filesystem labels where you give them, and fall back on 'dev' otherwise)" \
		"uuid"	"by Universally Unique Identifier (You don't need to do anything, but doesn't look pretty)" || return 1
	PART_ACCESS=$ANSWER_OPTION
	ALLOK=0
	while [ "$ALLOK" = 0 ]
	do
		# Let the user make filesystems and mountpoints. USERHAPPY becomes 1 when the user hits DONE.
		USERHAPPY=0

		while [ "$USERHAPPY" = 0 ]
		do
			# generate a menu based on the information in the datafile
			menu_list=
			while read part type label fs
			do
				# leave out unneeded info from fs string
				fs_display=${fs//;yes/}
				fs_display=${fs//;target/}
				[ "$label" != no_label ] && label_display="($label)"
				[ "$label"  = no_label ] && label_display=
				if [ -b "${part/+/}" ] && get_blockdevice_size ${part/+/} MiB # test -b <-- exit's 0, test -b '' exits >0.
				then
					infostring="${type},${BLOCKDEVICE_SIZE}MiB${label_display}->$fs_display" # add size in MiB for existing blockdevices (eg not for mapper devices that are not yet created yet)
				else
					infostring="${type}${label_display}->$fs_display"
				fi
				menu_list="$menu_list $part $infostring" #don't add extra spaces, dialog doesn't like that.
			done < $TMP_BLOCKDEVICES

			ask_option no "Manage filesystems" "Here you can manage your filesystems, block devices and virtual devices (device mapper). \
				Note that you don't *need* to specify opts, labels or extra params if you're not using lvm, dm_crypt, etc." required $menu_list DONE _
			[ $? -gt 0                 ] && return 1
			[ "$ANSWER_OPTION" == DONE ] && USERHAPPY=1 && break

			part=$ANSWER_OPTION

			declare part_escaped=${part//\//\\/} # escape all slashes otherwise awk complains
			declare part_escaped=${part_escaped/+/\\+} # escape the + sign too
			part_type=$( awk "/^$part_escaped / {print \$2}" $TMP_BLOCKDEVICES)
			part_label=$(awk "/^$part_escaped / {print \$3}" $TMP_BLOCKDEVICES)
			fs=$(        awk "/^$part_escaped / {print \$4}" $TMP_BLOCKDEVICES)
			[ "$part_label" == no_label ] && part_label=
			[ "$fs"         == no_fs    ] && fs=

			if [ $part_type = lvm-vg ] # one lvm VG can host multiple LV's so that's a bit a special blockdevice...
			then
				list=
				if [ -n "$fs" ]
				then
					for lv in `sed 's/|/ /g' <<< $fs`
					do
						label=$(cut -d ';' -f 6 <<< $lv)
						size=$( cut -d ';' -f 7 <<< $lv)
						list="$list $label $size"
					done
				fi
				list="$list empty NEW"
				ask_option empty "Manage LV's on this VG" "Edit/create new LV's on this VG:" required $list && {
					EDIT_VG=$ANSWER_OPTION
					if [ "$ANSWER_OPTION" = empty  ]
					then
						# a new LV must be created on this VG
						if interactive_filesystem $part $part_type $part_label '' 
						then
							if [ "$NEW_FILESYSTEM" != no_fs ]
							then
								[ -n "$fs" ] && fs="$fs|$NEW_FILESYSTEM"
								[ -z "$fs" ] && fs=$NEW_FILESYSTEM
							fi
						fi
					else
						# an existing LV will be edited and it's settings updated
						for lv in `sed 's/|/ /g' <<< $fs`
						do
							label=$(cut -d ';' -f 6 <<< $lv)
							[ "$label" = "$EDIT_VG" ] && found_lv="$lv"
						done
						interactive_filesystem $part $part_type $part_label "$found_lv"
						newfs=
						for lv in `sed 's/|/ /g' <<< $fs`
						do
							label=$(cut -d ';' -f 6 <<< $lv)
							if [ "$label" != "$EDIT_VG" ]
							then
								add=$lv
							elif [ $NEW_FILESYSTEM != no_fs ]
							then
								add=$NEW_FILESYSTEM
							else
								add=
							fi
							[ -n "$add" -a -n "$newfs" ] && newfs="$newfs|$add"
							[ -n "$add" -a -z "$newfs" ] && newfs=$add
						done
						fs=$newfs
					fi
				}
			else
				interactive_filesystem $part $part_type "$part_label" "$fs"
				[ $? -eq 0 ] && fs=$NEW_FILESYSTEM
			fi

			# update the menu # NOTE that part_type remains raw for basic filesystems!
			[ -z "$part_label" ] && part_label=no_label
			[ -z "$fs"         ] && fs=no_fs
			sed -i "s#^$part $part_type $part_label.*#$part $part_type $part_label $fs#" $TMP_BLOCKDEVICES # '#' is a forbidden character !
		done

		# Check all conditions that need to be fixed and ask the user if he wants to go back and correct them
		errors=
		warnings=

		grep -q ';/boot;' $TMP_BLOCKDEVICES || warnings="$warnings\n-No separate /boot filesystem"
		grep -q ';/;'     $TMP_BLOCKDEVICES || errors="$errors\n-No filesystem with mountpoint /"
		grep -q ' swap;'  $TMP_BLOCKDEVICES || grep -q '|swap;' $TMP_BLOCKDEVICES || warnings="$warnings\n-No swap partition defined"

		if [ -n "$errors$warnings" ]
		then
			str="The following issues have been detected:\n"
			[ -n "$errors" ] && str="$str\n - Errors: $errors"
			[ -n "$warnings" ] && str="$str\n - Warnings: $warnings"
			[ -n "$errors" ] && str="$str\nIt is highly recommended you go back to fix at least the errors."
			str="$str\nIf you hit cancel, we will abort here and go back to the menu"
			if ask_option back "Issues detected. what do you want to do?" "$str" required back "go back to fix the issues" ignore "continue, ignoring the issues"
			then
				[ "$ANSWER_OPTION" == ignore ] && ALLOK=1
			else
				return 1
			fi
		else
			ALLOK=1
		fi

	done


	process_filesystems && notify "Partitions were successfully created." && return 0
	ask_yesno "Seems like some stuff went wrong while processing the filesystems.  do you want to rollback? (this cleans up the new mountpoints, filesystems, etc. not doing this can break the next run of the installer unless you clean it up yourself" yes && rollback_filesystems
	return 1
}


# select_packages()
# prompts the user to select packages to install
#
# params: none
# returns: 1 on error
interactive_select_packages() {

	# set up our install location if necessary and sync up so we can get package lists
	target_prepare_pacman || { show_warning 'Pacman preparation failure' "Pacman preparation failed! Check $LOG for errors."; return 1; }

	repos=`list_pacman_repos target`
	notify "Package selection is split into two stages.  First you will select package groups that contain packages you may be interested in.  Then you will be presented with a full list of packages for each group, allowing you to fine-tune.\n\n
Note that right now the packages (and groups) selection is limited to the repos available at this time ($repos).  Once you have your Arch system up and running, you have access to more repositories and packages.\n\n
If any previous configuration you've done until now (like fancy filesystems) require extra packages, we've already preselected them for your convenience"

    # show group listing for group selection, base is ON by default, all others are OFF
    local _grouplist="base ^ ON"
    for i in $(list_package_groups | sed "s/^base$/ /g"); do
        _grouplist="${_grouplist} ${i} - OFF"
    done

    ask_checklist "Select Package groups\nDO NOT deselect BASE unless you know what you're doing!" $_grouplist || return 1
    _grouplist=$ANSWER_CHECKLIST # _grouplist now contains all groups (the tags from the dialog checklist)

    # assemble a list of packages with groups, marking pre-selected ones
    # <package> <group> <selected>
    local _pkgtmp="$(list_packages repo core | awk '{print $2}')" # all packages in core repository. TODO: we should use $repos here
    local _pkglist=''

    which_group "$_pkgtmp"
    # assemble some packages which we'll definitely select by default because we figured out we'll need them:
    needed_pkgs=("${needed_pkgs_fs[@]}")
    while read pkgname pkggroup; do
        # check if this package is in a selected group
        # slightly ugly but sorting later requires newlines in the variable
        if [ "${_grouplist/"\"$pkggroup\""/XXXX}" != "${_grouplist}" ] || check_is_in $pkgname "${needed_pkgs[@]}"
	then
            _pkglist="$(echo -e "${_pkglist}\n${pkgname} ${pkggroup} ON")"
        else
            _pkglist="$(echo -e "${_pkglist}\n${pkgname} ${pkggroup} OFF")"
        fi
    done <<< "$PACKAGE_GROUPS"

    # sort by group
    _pkglist="$(echo "$_pkglist" | sort -f -k 2)"
    [ -z "$_pkglist" ] && show_warning "No packages found" "Sorry. I could not find any packages. maybe your network is not setup correctly, you lost connection, no mirror setup, bad group, ..." && return 1

    ask_checklist "Select Packages To Install." $_pkglist || return 1
	var_TARGET_PACKAGES=$ANSWER_CHECKLIST # contains now all package names
    return 0
}


# Hand-hold through setting up networking
#
# args: none
# returns: 1 on failure
interactive_runtime_network() {
    INTERFACE=""
    S_DHCP=""
    local ifaces
    ifaces=$(ifconfig -a |grep "Link encap:Ethernet"|sed 's/ \+Link encap:Ethernet \+HWaddr \+/ /g')

    [ -z "$ifaces" ] && show_warning "No network interfaces?" "Cannot find any ethernet interfaces. This usually means udev was\nunable to load the module and you must do it yourself. Switch to\nanother VT, load the appropriate module, and run this step again." && return 1

    ask_option no "Interface selection" "Select a network interface" required $ifaces || return 1
    INTERFACE=$ANSWER_OPTION

    if ask_yesno "Do you want to use DHCP?"
    then
        inform "Please wait.  Polling for DHCP server on $INTERFACE..."
        dhcpcd -k $INTERFACE >$LOG 2>&1
        if ! dhcpcd $INTERFACE >$LOG 2>&1
        then
            show_warning "Dhcpcd problem" "Failed to run dhcpcd.  See $LOG for details."
            return 1
        fi
        if ! ifconfig $INTERFACE | grep -q 'inet addr:'
	then
            show_warning "Dhcpcd problem" "DHCP request failed. dhcpcd returned 0 but no ip configured for $INTERFACE"
            return 1
        fi
        S_DHCP=1
    else
    	S_DHCP=0
        NETPARAMETERS=""
        while [ "$NETPARAMETERS" = "" ]; do
            ask_string "Enter your IP address" "192.168.0.2" || return 1
            IPADDR=$ANSWER_STRING
            ask_string "Enter your netmask" "255.255.255.0" || return 1
            SUBNET=$ANSWER_STRING
            ask_string "Enter your broadcast" "$(sed 's/\.[^.]*$/\.255/' <<< $IPADDR)" || return 1
            BROADCAST=$ANSWER_STRING
            ask_string "Enter your gateway (optional)" "$(sed 's/\.[^.]*$/\.1/' <<< $IPADDR)" 0 || return 1
            GW=$ANSWER_STRING
            [ -n "$GW" ] && default_dns="$GW"
            [ -z "$GW" ] && default_dns="$(sed 's/\.[^.]*$/\.1/' <<< $IPADDR)"
            ask_string "Enter your DNS server IP" "$default_dns" || return 1
            DNS=$ANSWER_STRING
            ask_string "Enter your HTTP proxy server, for example:\nhttp://name:port\nhttp://ip:port\nhttp://username:password@ip:port\n\n Leave the field empty if no proxy is needed to install." "" 0 || return 1
            PROXY_HTTP=$ANSWER_STRING
            ask_string "Enter your FTP proxy server, for example:\nhttp://name:port\nhttp://ip:port\nhttp://username:password@ip:port\n\n Leave the field empty if no proxy is needed to install." "" 0 || return 1
            PROXY_FTP=$ANSWER_STRING
            ask_yesno "Are these settings correct?\n\nIP address:         $IPADDR\nNetmask:            $SUBNET\nBroadcast:          $BROADCAST\nGateway (optional): $GW\nDNS server:         $DNS\nHTTP proxy server:  $PROXY_HTTP\nFTP proxy server:   $PROXY_FTP"
            case $? in
                1) ;;
                0) NETPARAMETERS="1" ;;
            esac
        done
        echo "running: ifconfig $INTERFACE $IPADDR netmask $SUBNET broadcast $BROADCAST up" >$LOG
        if ! ifconfig $INTERFACE $IPADDR netmask $SUBNET broadcast $BROADCAST up >$LOG 2>&1
        then
        	show_warning "Ifconfig problem" "Failed to setup interface $INTERFACE"
        	return 1
        fi
        if [ -n "$GW" ]; then
            route add default gw $GW >$LOG 2>&1 || notify "Failed to setup your gateway." || return 1
        fi
        if [ -z "$PROXY_HTTP" ]; then
            unset http_proxy
        else
            export http_proxy=$PROXY_HTTP
        fi
        if [ -z "$PROXY_FTP" ]; then
            unset ftp_proxy
        else
            export ftp_proxy=$PROXY_FTP
        fi
        echo "nameserver $DNS" >/etc/resolv.conf
    fi
    echo "INTERFACE=$INTERFACE
          S_DHCP=$S_DHCP
          IPADDR=$IPADDR
          SUBNET=$SUBNET
          BROADCAST=$BROADCAST
          GW=$GW
          DNS=$DNS
          PROXY_HTTP=$PROXY_HTTP
          PROXY_FTP=$PROXY_FTP" > $RUNTIME_DIR/aif-network-settings
    notify "The network is configured."
    return 0
}

interactive_install_bootloader () {
	ask_option Grub "Choose bootloader" "Which bootloader would you like to use?  Grub is the Arch default." required \
	                "Grub" "Use the GRUB bootloader (default)" \
	                "None" "\Zb\Z1Warning\Z0\ZB: you must install your own bootloader!" || return 1

	bl=`tr '[:upper:]' '[:lower:]' <<< "$ANSWER_OPTION"`
	[ "$bl" != grub ] && return 0
    GRUB_OK=0
	interactive_grub
}

interactive_grub() {
	get_grub_map
	local grubmenu="$var_TARGET_DIR/boot/grub/menu.lst"
	[ ! -f $grubmenu ] && show_warning "No grub?" "Error: Couldn't find $grubmenu.  Is GRUB installed?" && return 1

    debug FS "starting interactive_grub"
    # try to auto-configure GRUB...
    debug 'UI-INTERACTIVE' "install_grub \$PART_ROOT $PART_ROOT \$GRUB_OK $GRUB_OK"
	if get_device_with_mount '/' && [ "$GRUB_OK" != '1' ] ; then
		GRUB_OK=0
		PART_ROOT=$ANSWER_DEVICE
		# look for a separately-mounted /boot partition
        # This could be used better, maybe we use a better variable name cause
        # we use this later in many things in workflow.
        # Currently we have bootdev as a device if we have a seperate /boot or empty
        # if no seperate /boot. Where our /boot realy lives is important later
        # to build the grub: root (hdx,y) part.
        # So maybe we set a flag variable like: sepboot=true|false and set bootdev to either
        # the partition with seperate /boot or to $PART_ROOT.
        # So that bootdev is always our real partition with /boot....
        bootdev=$(mount | grep $var_TARGET_DIR/boot | cut -d' ' -f 1)
		# check if bootdev or PART_ROOT is on a md raid array
        # This dialog is only shown when we detect / or /boot on a raid device.
		if [ -n "$(mdraid_is-raid $bootdev)" -o -n "$(mdraid_is-raid $PART_ROOT)" ]; then
			ask_yesno "Do you have your system installed on software raid?\nAnswer 'YES' to install grub to another hard disk." no
			if [ $? -eq 0 ]; then
				onraid=true
                debug FS "onraid is selected"
			fi
		fi
        # Create and edit the grub menu.lst
        interactive_grub_menulst

        DEVS=$(finddisks 1 _)
        DEVS="$DEVS $(findblockdevices 1 _)"
        if [ "$DEVS" = " " ]; then
            notify "No hard drives were found"
            return 1
        fi
        # copy initial grub files into installed system
        cp -a $var_TARGET_DIR/usr/lib/grub/i386-pc/* $var_TARGET_DIR/boot/grub/
        sync
        # freeze xfs filesystems to enable grub installation on xfs filesystems
        for xfsdev in $(blkid -t TYPE=xfs -o device); do
            mnt=$(mount | grep $xfsdev | cut -d' ' -f 3)
            if [ $mnt = "$var_TARGET_DIR/boot" -o $mnt = "$var_TARGET_DIR/" ]; then
                /usr/sbin/xfs_freeze -f $mnt > /dev/null 2>&1
            fi
        done
        
        if [ ! $onraid ]; then
            # Set boot partition to the device where our /boot lives.
            [ -z $bootdev ] && bootpart=$PART_ROOT || bootpart=$bootdev
            ask_option no "Boot device selection" "Select the boot device where the GRUB bootloader will be installed (usually the MBR and not a partition)." required $DEVS || return 1
            bootdev=$ANSWER_OPTION
            boothd=$(echo $bootdev | cut -c -8)
            interactive_grub_install $bootpart $bootdev $boothd
            if [ $? -eq 0 ]; then
                GRUB_OK=1
            fi
        else
            # Raid special
            # The bootpart and bootdev should not be changed when setup grub on all raid array members.
            # Instead the device is mapped via grub parameter device
            # So a grub setup on MBR sda/sdb with /boot on sda1/sdb1 should always be done like:
            # device (hd0) /dev/sd(a|b)
            # root (hd0,0)
            # setup (hd0)
            
            # get md device either if we use separate /boot or not.
            [ -z $bootdev ] && local md=$PART_ROOT || local md=$bootdev
            
            local ask_str="Do you want to install grub to the MBR of each harddisk from your BOOT array "$md" ? (recommended)"
            ask_yesno "$ask_str" yes
            if [ $? -eq 0 ]; then
				slaves=$(mdraid_all-slaves $md)
                for slave in $slaves; do
                    boothd=$(echo $slave | cut -c -8)
                    bootpart=$(mdraid_slave0 $md)
                    bootdev=$(echo $bootpart | cut -c -8)
                    interactive_grub_install $bootpart $bootdev $boothd
                    if [ $? -eq 0 ]; then
                        GRUB_OK=1
                    fi
                done
            else
                # This part needs more attention... User could select here only
                # a other blockdevice to install grub into... But our grub rootdevice
                # is not selectable, cause it is determined either from PART_ROOT or
                # bootdev.
                # Maybe better we leave the user alone and poke him to use a grub
                # shell if he want do something unusefull and not install grub in
                # aech MBR of affected HD in raid array....
                USERHAPPY=0
                while [ "$USERHAPPY" = 0 ]
                do
                    ask_option no "Boot device selection" "Select the boot device where the GRUB bootloader will be installed." required $DEVS DONE _
                    [ $? -gt 0                 ] && USERHAPPY=1 && break
                    [ "$ANSWER_OPTION" == DONE ] && USERHAPPY=1 && break
                    bootdev=$ANSWER_OPTION
                    boothd=$(echo $bootdev | cut -c -8)
                    bootpart=$(mdraid_slave0 $md)
                    bootdev=$(echo $bootpart | cut -c -8)
                    interactive_grub_install $bootpart $bootdev $boothd
                    if [ $? -eq 0 ]; then
                        GRUB_OK=1
                    fi
                done
			fi

            if [ "$bootpart" = "" ]; then
                if [ "$PART_ROOT" = "" ]; then
                    ask_string "Enter the full path to your root device" "/dev/sda3" || return 1
                    bootpart=$ANSWER_STRING
                else
                    bootpart=$PART_ROOT
                fi
                boothd=$(echo $bootpart | cut -c -8)
                interactive_grub_install $bootpart $bootdev $boothd
                if [ $? -eq 0 ]; then
                    GRUB_OK=1
                fi
            fi
        fi
        # unfreeze xfs filesystems
        for xfsdev in $(blkid -t TYPE=xfs -o device); do
            mnt=$(mount | grep $xfsdev | cut -d' ' -f 3)
            if [ $mnt = "$var_TARGET_DIR/boot" -o $mnt = "$var_TARGET_DIR/" ]; then
                /usr/sbin/xfs_freeze -u $mnt > /dev/null 2>&1
            fi
        done
        
        if [ "$GRUB_OK" == "1" ]; then
            notify "GRUB was successfully installed."
        else
            show_warning "Grub installation failure" "GRUB was NOT successfully installed."
            return 1
        fi
        return 0
    fi
}

generate_grub_menulst() {
	local grubmenu="$var_TARGET_DIR/boot/grub/menu.lst"
	get_device_with_mount '/' || return 1
	local _rootpart=$ANSWER_DEVICE

	# Determine what is the device that acts as grub's root
	# This is the blockdevice where /boot lives, normally a seperate partition.
	#
	# Special handling: on md raid arrays
	# md raid could not work directly with grub. To get grub's root device we
	# parse the slave 0 in the md array to get a real blockdevice (/dev/sdXY)
	#
	# We get at last in grubdev the blockdevice in grub-legacy notation (ex: (hd0,0)
	#
    # We do may things double here and in interactive_grub_install
    # Better way would be to determine/ask neccassary things once and then
    # fill (and present) menu.lst to user. If user mean there is something
    # wrong with menu.lst settings (wrong boot device or wrong root=/device)
    # he better should re-run the interactive grub install and select correct
    # settings.
    debug FS "Grub _rootpart: ${_rootpart}"
    debug FS "Grub bootdev: "$bootdev
	# No seperate /boot partition
	if [ -z $bootdev ]; then
		# Special handling on md raid
		if [ $onraid ]; then
			grubdev=$(mapdev $(mdraid_slave0 ${_rootpart}))
            debug FS "onraid no sep boot slave0: "$(mdraid_slave0 ${_rootpart})
            debug FS "onraid no sep boot grubdev: "$grubdev
		else
			# No raid
			grubdev=$(mapdev ${_rootpart})
            debug FS "no sep boot grubdev: "$grubdev
		fi
		# Without seperate /boot partiton we have to specify this path
		subdir="/boot"
	# with seperate /boot partition
	else
		# Special handling on md raid
		if [ $onraid ]; then
			grubdev=$(mapdev $(mdraid_slave0 $bootdev))
            debug FS "onraid with sep boot slave0: "$(mdraid_slave0 $bootdev)
            debug FS "onraid with sep boot grubdev: "$grubdev
		else
			# No raid
			grubdev=$(mapdev $bootdev)
            debug FS "onraid with sep boot grubdev: "$grubdev
		fi
	fi
	# Now that we have our grub-legacy root device (grubdev).
    # keep the file from being completely bogus
	[ "$grubdev" = "DEVICE NOT FOUND" ] && grubdev=
	if [ -z "$grubdev" ]; then
                notify "Your root boot device could not be autodetected by setup.  Ensure you adjust the 'root (hd0,0)' line in your GRUB config accordingly."
                grubdev="(hd0,0)"
            fi
            # remove default entries by truncating file at our little tag (#-*)
            sed -i -e '/#-\*/q' $grubmenu

	# find label or uuid of the root partition
	case $PART_ACCESS in
		label)
			local _label="$(getlabel $_rootpart)"
			if [ -n "${_label}" ]; then
			    _rootpart="/dev/disk/by-label/${_label}"
			fi
			;;
		uuid)
			local _uuid="$(getuuid $_rootpart)"
			if [ -n "${_uuid}" ]; then
			    _rootpart="/dev/disk/by-uuid/${_uuid}"
			fi
			;;
	esac

		# handle dmraid/mdadm,lvm,dm_crypt etc. replace entries where needed automatically
		kernel="kernel $subdir/vmlinuz26 root=${_rootpart} ro"
		if get_anchestors_mount ';/;'
		then
			if echo "$ANSWER_DEVICES" | sed -n '1p' | grep -q 'dm_crypt$' && echo "$ANSWER_DEVICES" | sed -n '2p' | grep -q 'raw$'
			then
				debug 'FS' 'Grub kernel line? Found / on dm_crypt on raw'
				raw_device=`echo "$ANSWER_DEVICES" | sed -n '2p' | cut -d ' ' -f1`
				crypt_device=`echo "$ANSWER_DEVICES" | sed -n '1p' | cut -d ' ' -f1`
				kernel="kernel $subdir/vmlinuz26 root=$crypt_device cryptdevice=$raw_device:`basename $crypt_device` ro"
			elif echo "$ANSWER_DEVICES" | sed -n '1p' | grep -q 'lvm-lv$' && echo "$ANSWER_DEVICES" | sed -n '4p' | grep -q 'dm_crypt$' && echo "$ANSWER_DEVICES" | sed -n '5p' | grep -q 'raw$'
			then
				debug 'FS' 'Grub kernel line? Found / on lvm on dm_crypt on raw'
				lv_device=`echo "$ANSWER_DEVICES" | sed -n '1p' | cut -d ' ' -f1`
				crypt_device=`echo "$ANSWER_DEVICES" | sed -n '4p' | cut -d ' ' -f1`
				raw_device=`echo "$ANSWER_DEVICES" | sed -n '5p' | cut -d ' ' -f1`
				kernel="kernel $subdir/vmlinuz26 root=$lv_device cryptdevice=$raw_device:`basename $crypt_device` ro"
			elif echo "$ANSWER_DEVICES" | sed -n '1p' | grep -q 'dm_crypt$' && echo "$ANSWER_DEVICES" | sed -n '2p' | grep -q 'lvm-lv$' && echo "$ANSWER_DEVICES" | sed -n '5p' | grep -q 'raw$'
			then
				debug 'FS' 'Grub kernel line? Found / on dm_crypt on lvm on raw'
				crypt_device=`echo "$ANSWER_DEVICES" | sed -n '1p' | cut -d ' ' -f1`
				lv_device=`echo "$ANSWER_DEVICES" | sed -n '2p' | cut -d ' ' -f1`
				kernel="kernel $subdir/vmlinuz26 root=$crypt_device cryptdevice=$lv_device:`basename $crypt_device` ro"
			elif echo "$ANSWER_DEVICES" | sed -n '1p' | grep -q 'raw$'
			then
				debug 'FS' 'Grub kernel line? Found / on raw'
			elif echo "$ANSWER_DEVICES" | sed -n '1p' | grep -q 'lvm-lv$' && echo "$ANSWER_DEVICES" | sed -n '4p' | grep -q 'raw$'
			then
				debug 'FS' 'Grub kernel line? Found / on lvm on raw'
			else
				debug 'FS' 'Grub kernel line? Could not figure this one out'
				show_warning "Disk setup detection" "Are you using some really fancy dm_crypt/lvm/softraid setup?\nI could not figure it out, so the kernel line will be the default: you'll probably need to edit it.\nPlease file a bug for this and supply all files from /tmp/aif/"
			fi
		else
			show_warning "Disk setup detection" "Could not find out where your / is.  Did you setup filesystems/blockdevices? manual/autoprepare?  If yes, please file a bug and tell us about this"
		fi
            cat >>$grubmenu <<EOF

# (0) Arch Linux
title  Arch Linux
root   $grubdev
$kernel
initrd $subdir/kernel26.img

# (1) Arch Linux
title  Arch Linux Fallback
root   $grubdev
$kernel
initrd $subdir/kernel26-fallback.img

# (2) Windows
#title Windows
#rootnoverify (hd0,0)
#makeactive
#chainloader +1
EOF
}

interactive_grub_menulst () {
	local grubmenu="$var_TARGET_DIR/boot/grub/menu.lst"
	generate_grub_menulst
	helptext=
	grep -q '^/dev/mapper' $TMP_FSTAB && helptext="  /dev/mapper/ users: Pay attention to the kernel line!"
    notify "Before installing GRUB, you must review the configuration file.  You will now be put into the editor.  After you save your changes and exit the editor, you can install GRUB.$helptext"
    if [ -z "$EDITOR" ]
    then
	interactive_get_editor || return 1
    fi
    $EDITOR $grubmenu
}

interactive_grub_install () {
	debug FS "interactive_grub_install called. P1 = $1, P2 = $2, P3 = $3"
    # $1 = bootpart
    # $2 = bootdev
    # $3 = boothd
    # To install grub we have to know:
    # The bootpart - This is were /boot could be found
    # The bootdev - This is were grub gets installed, usally the MBR
    # The boothd - Only on md raid setups this differs from bootdev
    # These values get parsed either from values we have already or from
    # user input. Later they will converted to grub-legacy notation.
    
    # Convert to grub-legacy notation
    local bootpart=$(mapdev $1)
    if [ "$bootpart" = "" ]; then
        notify "Error: Missing/Invalid root device: $bootpart"
        return 1
    fi
	local bootdev=$(mapdev $2)
    if [ "$bootpart" = "DEVICE NOT FOUND" -o "$bootdev" = "DEVICE NOT FOUND" ]; then
        notify "GRUB root and setup devices could not be auto-located.  You will need to manually run the GRUB shell to install a bootloader."
        return 1
    fi
    local boothd=$3
    debug FS "bootpart: $bootpart"
    debug FS "bootdev: $bootdev"
    debug FS "boothd: $boothd"
    #return 0
    
    $var_TARGET_DIR/sbin/grub --no-floppy --batch >/tmp/grub.log 2>&1 <<EOF
device $bootdev $boothd
root $bootpart
setup $bootdev
quit
EOF
    cat /tmp/grub.log >$LOG
    if grep "Error [0-9]*: " /tmp/grub.log >/dev/null; then
        notify "Error installing GRUB. (see $LOG for output)"
        return 1
    fi
}


# select_source(). taken from setup.
# displays installation source selection menu
# and sets up relevant config files
#
# params: none
# returns: nothing
interactive_select_source()   
{
	var_PKG_SOURCE_TYPE=
        var_FILE_URL="file:///src/core/pkg"
        var_SYNC_URL=

	ask_option no "Source selection" "Please select an installation source" required \
    "cd"  "CD-ROM or OTHER SOURCE" \
    "net" "NET (FTP/HTTP)" || return 1

    case $ANSWER_OPTION in
        "cd") var_PKG_SOURCE_TYPE="cd" ;;
        "net") var_PKG_SOURCE_TYPE="net" ;;
    esac

    if [ "$var_PKG_SOURCE_TYPE" = "cd" ]; then
        TITLE="Arch Linux CDROM or OTHER SOURCE Installation"
        notify "Packages included on this disk have been mounted to /src/core/pkg. If you wish to use your own packages from another source, manually mount them there."
        if [ ! -d /src/core/pkg ]; then
            notify "Package directory /src/core/pkg is missing!"
            return 1
        fi
        echo "Using CDROM for package installation" >$LOG
    else
        TITLE="Arch Linux NET (FTP/HTTP) Installation"
        notify "If you wish to load your ethernet modules manually, please do so now in an another terminal."
   fi
   return 0
}


# select_mirror(). taken from setup.
# Prompt user for preferred mirror and set $var_SYNC_URL
#
# args: none
# returns: nothing
interactive_select_mirror() { 
        notify "Keep in mind ftp.archlinux.org is throttled.\nPlease select another mirror to get full download speed."
        # FIXME: this regex doesn't honor commenting
        MIRRORS=$(egrep -o '((ftp)|(http))://[^/]*' "${var_MIRRORLIST}" | sed 's|$| _|g')
        ask_option no "Mirror selection" "Select an FTP/HTTP mirror" required $MIRRORS "Custom" "_" || return 1
    local _server=$ANSWER_OPTION
    if [ "${_server}" = "Custom" ]; then
        ask_string "Enter the full URL to core repo." "ftp://ftp.archlinux.org/core/os/$var_ARCH" || return 1
        var_SYNC_URL=${ANSWER_STRING/\/core\///\$repo/} #replace '/core/' by '/$repo/'
    else
        # Form the full URL for our mirror by grepping for the server name in
        # our mirrorlist and pulling the full URL out.
        # Ensure that if it was listed twice we only return one line for the mirror.
        var_SYNC_URL=$(egrep -o "${_server}.*" "${var_MIRRORLIST}" | head -n1)
    fi
    echo "Using mirror: $var_SYNC_URL" >$LOG
}

# geteditor().
# prompts the user to choose an editor
# sets EDITOR global variable
#
interactive_get_editor() {
	unset EDITOR_OPTS
	which nano &>/dev/null && EDITOR_OPTS+=("nano" "nano (easier)")
	which joe  &>/dev/null && EDITOR_OPTS+=("joe"  "joe's editor")
	which vi   &>/dev/null && EDITOR_OPTS+=("vi"   "vi (advanced)")
	ask_option nano "Text editor selection" "Select a Text Editor to Use" required "${EDITOR_OPTS[@]}" || return 1
	#TODO: this code could be a little bit cleaner.
	case $ANSWER_OPTION in
		"nano") EDITOR="nano" ;;
		"joe")  EDITOR="joe"  ;;
		"vi")   EDITOR="vi"   ;;
		*)      EDITOR="nano" ;;
	esac
}


select_source_extras_menu ()
{
	while true; do
		default=no
		[ -n "$NEXTITEM" ] && default="$NEXTITEM"
		ask_option $default "NET (HTTP/FTP) Installation" "Make sure the network is ok and you've selected a mirror before continuing the installer" required \
		"1" "$worker_runtime_network_title" \
		"2" "$worker_select_mirror_title" \
		"3" "Return to Main Menu" || return 1
		[ "$ANSWER_OPTION" = 1 ] && execute worker runtime_network && NEXTITEM=2
		[ "$ANSWER_OPTION" = 2 ] && execute worker select_mirror && NEXTITEM=3
		[ "$ANSWER_OPTION" = 3 ] && break
	done
}