selkernel.sh

#!/bin/bash

mode="default"
height=20
width=40
choice_height=19

function sel_mode {
  backtitle="Select if default or failsafe"
  title="muh"
  menu="Choose one of the following options:"
  options=(1 "default"
           2 "failsafe")
  choice=$(dialog --clear --backtitle "$backtitle" --title "$title" --menu "$menu" $height $width $choice_height "${options[@]}" 2>&1 >/dev/tty)
  clear
  case $choice in
    1) mode="default" ;;
    2) mode="failsafe" ;;
    *) exit ;;
  esac
}

function sel_kernel {
  act=`find /boot/conf.d/system.${mode} -type l -ls | grep -o 'linux\-.*'`
  actint=0
  backtitle="Select Kernel for ${mode}"
  title="Actual ${mode}: ${act}"
  menu="Choose one of the following options:"
  options=()
  kernels=("dummy")
  j=1
  for i in $(ls /boot/kernel.d); do
    if [[ $i == "linux-"* ]]; then
      if [[ $i == $act ]]; then
        options+=("${j//'"'/}" "${i//'"'/} [*]")
        actint=$j
      else
        options+=("${j//'"'/}" "${i//'"'/}")
      fi
      kernels+=($i)
      j=`expr $j + 1`
    fi
  done
  choice=$(dialog --clear --backtitle "$backtitle" --title "$title" --menu "$menu" $height $width $choice_height "${options[@]}" 2>&1 >/dev/tty)
  clear
  if [[ $choice == $actint ]]; then
    echo "no changes; abort"
  else
    if (( choice > 0 )); then
      echo "changing kernel to ${kernels[$choice]}"
      rm /boot/conf.d/system.${mode}/kernel
      cd /boot/conf.d/system.${mode}
      ln -s ../../kernel.d/${kernels[$choice]} kernel
      echo "symlink: `find /boot/conf.d/system.${mode} -type l -ls | grep -o 'linux\-.*'`"
    else
      echo "nothing choosed; abort"
    fi
  fi
}

function check_updates {
  versions=("dummy" "aarch64-rc" "aarch64" "odroid-c2")
  backtitle="check for updates"
  title="check for updates"
  echo "0" | dialog --title "$title" --backtitle "$backtitle" --gauge "update repo" 0 0
  pacman -Sy 2>&1 >/dev/null
  echo "33" | dialog --title "$title" --backtitle "$backtitle" --gauge "linux-aarch64-rc" 0 0
  cu_main=`pacman -Si linux-aarch64-rc | grep 'Version.*' | sed -r 's/.*\: (.*?)\-1/linux-\\1/g'`
  echo "66" | dialog --title "$title" --backtitle "$backtitle" --gauge "linux-aarch64" 0 0
  cu_rc=`pacman -Si linux-aarch64 | grep 'Version.*' | sed -r 's/.*\: (.*?)\-1/linux-\\1/g'`
  echo "100" | dialog --title "$title" --backtitle "$backtitle" --gauge "linux-odroid-c2" 0 0
  cu_c2=`pacman -Si linux-odroid-c2 | grep 'Version.*' | sed -r 's/.*\: (.*?)/linux-\\1/g'`
  clear
  options=(1 "$cu_main"
           2 "$cu_rc"
           3 "$cu_c2")
  backtitle="choose version to install"
  title="choose version to install"
  menu="CHOOSE"
  choice=$(dialog --clear --backtitle "$backtitle" --title "$title" --menu "$menu" $height $width $choice_height "${options[@]}" 2>&1 >/dev/tty)
  clear
  if [[ $choice ]]; then
    pacman -S linux-"${versions[$choice]}"
    sel_mode
    sel_kernel
  else
    echo "abort"
  fi
}

function convert_kernel {
  kver=`pacman -Qo /boot/Image | grep -o 'by.*' | sed -r 's/by .* (.*?)/\\1/g'`
  if [ -f "/boot/Image" ]; then
    rm /boot/kernel.d/linux-${kver} -Rf
    mkdir -p /boot/kernel.d/linux-${kver}
    mkimage -A arm64 -O linux -T ramdisk -a 0x0 -e 0x0 -d /boot/initramfs-linux.img -n ${kver} /boot/kernel.d/linux-${kver}/uInitrd
    mkimage -A arm64 -O linux -T kernel -C none -a 0x1080000 -e 0x1080000 -n ${kver} -d /boot/Image /boot/kernel.d/linux-${kver}/uImage
     if [[ -f "/boot/dtbs/meson64_odroidc2.dtb" ]]; then # linux-odroid-c2
       mv /boot/dtbs/meson64_odroidc2.dtb /boot/kernel.d/linux-${kver}/meson-gxbb-odroidc2.dtb
     else # linux-aarch64(-rc)
       mv /boot/dtbs/amlogic/meson-gxbb-odroidc2.dtb /boot/kernel.d/linux-${kver}/meson-gxbb-odroidc2.dtb
     fi
    mv /boot/Image /boot/kernel.d/linux-${kver}/Image
    rm /boot/Image.gz /boot/dtbs /boot/initramfs-linux* -Rf
  else
    echo "No new Image found"
    if ! [[ $noreturn ]]; then
      main_menu
    fi
  fi
}

function main_menu {
  backtitle="muh"
  title="mode: ${mode}"
  menu="Choose one of the following options:"
  case $mode in
    "default") switchto="failsafe" ;;
    "failsafe") switchto="default" ;;
  esac
  options=(1 "switch to ${switchto}"
           2 "change Kernelsymlink"
           3 "convert Kernel in /boot"
           4 "check for Kernelupdate")
  choice=$(dialog --clear --backtitle "$backtitle" --title "$title" --menu "$menu" $height $width $choice_height "${options[@]}" 2>&1 >/dev/tty)
  clear

  case $choice in
    1)
      #sel_mode
      case $mode in
        "default") mode="failsafe" ;;
        "failsafe") mode="default" ;;
      esac
      main_menu
      ;;
    2)
      sel_kernel
      ;;
    3)
      convert_kernel
      ;;
    4)
      check_updates
      ;;
    *)
      exit
      ;;
  esac
}

if [[ $1 == "ck" ]]; then
  noreturn=true
  convert_kernel
else
  main_menu
fi