Mini Shell

#!/usr/bin/bash

COMMAND="$1"
KERNEL_VERSION="$2"
BOOT_DIR_ABS="$3"
KERNEL_IMAGE="$4"

if ! [[ $KERNEL_INSTALL_MACHINE_ID ]]; then
  exit 0
fi

MACHINE_ID=$KERNEL_INSTALL_MACHINE_ID

# with grub2 always /boot
BOOT_ROOT="/boot"
LOADER_ENTRIES="$BOOT_ROOT/loader/entries"

[ -d "$LOADER_ENTRIES" ] || exit 0

[ "$COMMAND" = "add" ] || exit 0

ARCH=`uname -m`

pushd "$LOADER_ENTRIES" &> /dev/null
for f in `basename "$MACHINE_ID"`-*.conf; do
  # Skip non-files and rescue entries
  if [ ! -f "$f" -o "${f: -12}" == "-rescue.conf" ]; then
    continue
  fi
  # Skip boom managed entries
  if [[ "$f" =~ \w*-[0-9a-f]{7,}-.*-.*.conf ]]; then
    continue
  fi

  if [ "${ARCH:0:4}" = "s390" ]; then
    # On s390(x), the zipl bootloader doesn't support variables,
    # unpatch TuneD variables which could be there from the previous TuneD
    # versions
    grep -q '^\s*options\s\+.*\$tuned_params' "$f" && sed -i '/^\s*options\s\+/ s/\s\+\$tuned_params\b//g' "$f"
    grep -q '^\s*initrd\s\+.*\$tuned_initrd' "$f" && sed -i '/^\s*initrd\s\+/ s/\s\+\$tuned_initrd\b//g' "$f"
  else
    # Not on s390(x), add TuneD variables if they are not there
    grep -q '^\s*options\s\+.*\$tuned_params' "$f" || sed -i '/^\s*options\s\+/ s/\(.*\)/\1 \$tuned_params/' "$f"
    grep -q '^\s*initrd\s\+.*\$tuned_initrd' "$f" || sed -i '/^\s*initrd\s\+/ s/\(.*\)/\1 \$tuned_initrd/' "$f"
  fi
done
popd &> /dev/null

exit 0