xNightR00T File Manager

#!/bin/bash

# Settings from /etc/sysconfig/filename are available as environment vars
# with the name 'SYS__FILENAME__KEY' (filename converted to upper case).
#
# Not all files are parsed, current list is:
#   bootloader, language
#

function print_entry {
	local label=$1
	local zimage=$2
	local initrd=$3
	local append=$4
	local dtb=$5

	echo "LABEL $label"
	echo -e "\tLINUX $(readlink -m $zimage)"
	echo -e "\tINITRD $(readlink -m $initrd)"
	if [ -d $dtb ] ; then
		echo -e "\tFDTDIR $(readlink -m $dtb)"
	else
		echo -e "\tFDT $(readlink -m $dtb)"
	fi
	echo -e "\tAPPEND $append"
}

function print_header {
	echo "# THIS FILE WILL BE OVERWRITTEN by perl-Bootloader"
	echo -n "# Last modification on "
	date
	echo "# Please, use /boot/extlinux.d and /etc/default/u-boot for configuration"
	echo
}

if [ ! -r /etc/default/u-boot ] ; then
	echo "/etc/default/u-boot: no such file"
	exit 1
fi

source /etc/default/u-boot

# Find zImages
machine=`uname -m`
case "x$machine" in
	xi?86 | xx86_64)
		zimage=(`find /boot -maxdepth 1 -name vmlinuz-\*`) ;;
	xaarch64)
		zimage=(`find /boot -maxdepth 1 -name Image-\*`) ;;
	*) 
		zimage=(`find /boot -maxdepth 1 -name zImage-\*`) ;;
esac
version=(${zimage[@]#*-})

# Generate filenames for initrd and dtbdir
initrd=(${version[@]/#/\/boot\/initrd-})
dtb=(${version[@]/#/\/boot\/dtb-})
dtb=(${dtb[@]%-*})

if [ ! -d /boot/extlinux.d ] ; then
	echo "/boot/extlinux.d: no such directory"
	exit 1
fi
entry_file=/boot/extlinux.d/50_generated.conf
print_header > $entry_file

echo "DEFAULT linux_0" >> $entry_file
echo "" >> $entry_file

entry_id=0
for ((i=0;i<${#zimage[@]};i++)) ; do
	# dtb and kernel release may differ
	basedtb=${dtb[$i]%-*}
	basedtb=($(echo ${basedtb}-*))
	dtb[$i]=${basedtb[0]}
	if [ -r ${initrd[$i]} -a -r ${zimage[$i]} -a -d ${dtb[$i]} ] ; then
		for dtbfile in / $U_BOOT_DTB_LINUX_DEFAULT ; do
			print_entry linux_$((entry_id++)) ${zimage[$i]} ${initrd[$i]} "$U_BOOT_CMDLINE_LINUX_DEFAULT" ${dtb[$i]}'/'${dtbfile} >> $entry_file
		done

		if [ "x$U_BOOT_DISABLE_RECOVERY" == "x" ] ; then
			for dtbfile in / $U_BOOT_DTB_LINUX_RECOVERY ; do
				print_entry linux_$((entry_id++)) ${zimage[$i]} ${initrd[$i]} "$U_BOOT_CMDLINE_LINUX_RECOVERY" ${dtb[$i]}'/'${dtbfile} >> $entry_file
			done
		fi
	fi
done

tmp_file=$(mkdir -p /boot/extlinux && mktemp -p /boot/extlinux)
print_header > $tmp_file
configs=(`find /boot/extlinux.d -maxdepth 1 -name \*.conf | sort`)

for ((i=0;i<${#configs[@]};i++)) ; do
	echo "### ${configs[$i]}" >> $tmp_file
	cat ${configs[$i]} >> $tmp_file
done

sync

if [ -e /boot/extlinux/extlinux.conf ] ; then
	cp /boot/extlinux/extlinux.conf /boot/extlinux/extlinux.conf.old
	sync
fi

mv $tmp_file /boot/extlinux/extlinux.conf
sync
exit 0