50-dracut.install

   1 #!/bin/bash
   2
   3 COMMAND="$1"
   4 KERNEL_VERSION="$2"
   5 BOOT_DIR_ABS="$3"
   6 KERNEL_IMAGE="$4"
   7
   8 ret=0
   9 case "$COMMAND" in
  10     add)
  11         INITRD_IMAGE_PREGENERATED=${KERNEL_IMAGE%/*}/initrd
  12         if [[ -f ${INITRD_IMAGE_PREGENERATED} ]]; then
  13             # we found an initrd at the same place as the kernel
  14             # use this and don't generate a new one
  15             cp --reflink=auto "$INITRD_IMAGE_PREGENERATED" "$BOOT_DIR_ABS/initrd" \
  16                 && chown root:root "$BOOT_DIR_ABS/initrd" \
  17                 && chmod 0600 "$BOOT_DIR_ABS/initrd" \
  18                 && exit 0
  19         fi
  20
  21         if [[ -f /etc/kernel/cmdline ]]; then
  22             read -r -d '' -a BOOT_OPTIONS < /etc/kernel/cmdline
  23         elif [[ -f /usr/lib/kernel/cmdline ]]; then
  24             read -r -d '' -a BOOT_OPTIONS < /usr/lib/kernel/cmdline
  25         fi
  26
  27         if ! [[ ${BOOT_OPTIONS[*]} ]]; then
  28             read -r -d '' -a BOOT_OPTIONS < /proc/cmdline
  29         fi
  30
  31         unset noimageifnotneeded
  32
  33         for ((i=0; i < "${#BOOT_OPTIONS[@]}"; i++)); do
  34             if [[ ${BOOT_OPTIONS[$i]} == root\=PARTUUID\=* ]]; then
  35                 noimageifnotneeded="yes"
  36                 break
  37             fi
  38         done
  39         dracut ${noimageifnotneeded:+--noimageifnotneeded} "$BOOT_DIR_ABS"/initrd "$KERNEL_VERSION"
  40         ret=$?
  41         ;;
  42     remove)
  43         rm -f -- "$BOOT_DIR_ABS"/initrd
  44         ret=$?
  45         ;;
  46 esac
  47 exit $ret