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 # If KERNEL_INSTALL_MACHINE_ID is defined but empty, BOOT_DIR_ABS is a fake directory.
   9 # So, let's skip to create initrd.
  10 if ! [[ ${KERNEL_INSTALL_MACHINE_ID-x} ]]; then
  11     exit 0
  12 fi
  13
  14 if [[ -d "$BOOT_DIR_ABS" ]]; then
  15     INITRD="initrd"
  16 else
  17     BOOT_DIR_ABS="/boot"
  18     INITRD="initramfs-${KERNEL_VERSION}.img"
  19 fi
  20
  21 ret=0
  22 case "$COMMAND" in
  23     add)
  24         INITRD_IMAGE_PREGENERATED=${KERNEL_IMAGE%/*}/initrd
  25         if [[ -f ${INITRD_IMAGE_PREGENERATED} ]]; then
  26             # we found an initrd at the same place as the kernel
  27             # use this and don't generate a new one
  28             cp --reflink=auto "$INITRD_IMAGE_PREGENERATED" "$BOOT_DIR_ABS/$INITRD" \
  29                 && chown root:root "$BOOT_DIR_ABS/$INITRD" \
  30                 && chmod 0600 "$BOOT_DIR_ABS/$INITRD" \
  31                 && exit 0
  32         fi
  33
  34         if [[ -f /etc/kernel/cmdline ]]; then
  35             read -r -d '' -a BOOT_OPTIONS < /etc/kernel/cmdline
  36         elif [[ -f /usr/lib/kernel/cmdline ]]; then
  37             read -r -d '' -a BOOT_OPTIONS < /usr/lib/kernel/cmdline
  38         else
  39             declare -a BOOT_OPTIONS
  40
  41             read -r -d '' -a line < /proc/cmdline
  42             for i in "${line[@]}"; do
  43                 [[ "${i#initrd=*}" != "$i" ]] && continue
  44                 BOOT_OPTIONS+=("$i")
  45             done
  46         fi
  47
  48         unset noimageifnotneeded
  49
  50         for ((i=0; i < "${#BOOT_OPTIONS[@]}"; i++)); do
  51             if [[ ${BOOT_OPTIONS[$i]} == root\=PARTUUID\=* ]]; then
  52                 noimageifnotneeded="yes"
  53                 break
  54             fi
  55         done
  56         dracut -f ${noimageifnotneeded:+--noimageifnotneeded} "$BOOT_DIR_ABS/$INITRD" "$KERNEL_VERSION"
  57         ret=$?
  58         ;;
  59     remove)
  60         rm -f -- "$BOOT_DIR_ABS/$INITRD"
  61         ret=$?
  62         ;;
  63 esac
  64 exit $ret