fakemurk/image_patcher.sh.pre

#include "fakemurk_lib.sh.pre"
: "this is essentially just wax for fakemurk"
SCRIPT_DIR=$(dirname "$0")
configure_binaries(){
  if [ -f /sbin/ssd_util.sh ]; then
    SSD_UTIL=/sbin/ssd_util.sh
  elif [ -f /usr/share/vboot/bin/ssd_util.sh ]; then
    SSD_UTIL=/usr/share/vboot/bin/ssd_util.sh
  elif [ -f "${SCRIPT_DIR}/lib/ssd_util.sh" ]; then
    SSD_UTIL="${SCRIPT_DIR}/lib/ssd_util.sh"
  else
    echo "ERROR: Cannot find the required ssd_util script. Please make sure you're executing this script inside the directory it resides in"
    exit 1
  fi
}
drop_boot_populator() {
    base64 -d <<-EOF | bunzip2 -dc >"$ROOT/sbin/crossystem_boot_populator.sh"
#include "crossystem_boot_populator.sh.b64"
EOF
    chmod 777 "$ROOT/sbin/crossystem_boot_populator.sh"
}

drop_image_patcher(){
  local path=$ROOT/sbin/image_patcher.sh

  # trust me
  echo "$(< $0)"> $path
  chmod 777 $path
}
patch_root() {
    disable_autoupdates
    drop_cr50_update
    drop_pollen
    drop_startup_patch
    echo "dropping boot populator"
    drop_boot_populator
    echo "installing mush shell"
    drop_mush
    echo "dropping fakemurk daemon"
    drop_daemon
    echo "staging populator"
    >$ROOT/population_required
    >$ROOT/reco_patched
    echo "preparing ausystem"
    drop_ssd_util
    drop_image_patcher
}
main() {
  traps
  ascii_info
  configure_binaries
  echo $SSD_UTIL

  if [ -z $1 ] || [ ! -f $1 ]; then
    echo "\"$1\" is not a real file!!! You need to pass the path to the recovery image"
    exit
  fi
  local bin=$1

  echo "Creating loop device"
  local loop=$(losetup -f)
  losetup -P "$loop" "$bin"

  echo "Disabling kernel verity"
  $SSD_UTIL --debug --remove_rootfs_verification -i ${loop} --partitions 4
  echo "Enabling RW mount"
  $SSD_UTIL --debug --remove_rootfs_verification --no_resign_kernel -i ${loop} --partitions 2

  # for good measure
  sync
  
  echo "Mounting target"
  mkdir /tmp/mnt || :
  mount "${loop}p3" /tmp/mnt

  ROOT=/tmp/mnt
  patch_root

  sleep 2
  sync
  echo "done. have fun"

  umount "$ROOT"
  sync
  losetup -D "$loop"
  sync
  sleep 2
  rm -rf /tmp/mnt
  leave
}

if [ "$0" = "$BASH_SOURCE" ]; then
    stty sane
    if [ "$EUID" -ne 0 ]; then
        echo "Please run as root"
        exit
    fi
    main "$@"
fi