#!/bin/bash

countdown=5

default=0

title[0]="Arch Linux"
kernel[0]="ArchLinux.image"
cmdline[0]="root=/dev/mmcblk0p2 rootfstype=ext3 rootwait"

title[1]="OpenELEC"
kernel[1]="OpenELEC.image"
cmdline[1]="root=/dev/ram0 rdinit=/init boot=/dev/mmcblk0p1 disk=/dev/mmcblk0p3 ssh debugging"

title[2]="Debian"
kernel[2]="ArchLinux.image"
cmdline[2]="root=/dev/mmcblk0p4 rootfstype=ext4 rootwait"

title[3]="USB (sda1)"
kernel[3]="ArchLinux.image"
cmdline[3]="root=/dev/sda1 rootwait"

version=0.1

tempfile=$( tempfile 2>/dev/null ) || tempfile=/tmp/choice$$
trap "rm -f $tempfile" 0 1 2 5 15

echo "4 1 1 7" > /proc/sys/kernel/printk
dialog --backtitle "XECLoader $version" --pause "Starting ${title[$default]}... \nPress Ok to start now.\nPress Cancel to select." 10 40 $countdown

if [ $? -eq 0 ]; then
    clear
    kexec -l "/mnt/kernels/${kernel[$default]}" --command-line="$( cat /proc/cmdline ) ${cmdline[$default]}"
    kexec -e
    else
    for (( i=0; i<${#title[@]}; i++ )); do
            options[2*i]=$i
            options[2*i+1]="${title[$i]}"
    done
        dialog --backtitle "XECLoader $version" --menu "Select system or cancel to launch a shell." 20 50 20 "${options[@]}" 2> $tempfile
        if [ $? -eq 0 ]; then
            dialog --backtitle "XECLoader $version" --infobox "Starting ${title[$( cat  $tempfile )]}..." 4 40;
            kexec -l "/mnt/kernels/${kernel[$( cat  $tempfile )]}" --command-line="$( cat /proc/cmdline ) ${cmdline[$( cat  $tempfile )]}"
            rm $tempfile
            kexec -e
        else
            /bin/bash
        fi
fi