dracut-initramfs-restore.sh

   1 #!/bin/bash
   2 # -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
   3 # ex: ts=8 sw=4 sts=4 et filetype=sh
   4
   5 set -e
   6
   7 KERNEL_VERSION="$(uname -r)"
   8
   9 [[ $dracutbasedir ]] || dracutbasedir=/usr/lib/dracut
  10 SKIP="$dracutbasedir/skipcpio"
  11 [[ -x $SKIP ]] || SKIP=cat
  12
  13 [[ -f /etc/machine-id ]] && read MACHINE_ID < /etc/machine-id
  14
  15 if [[ $MACHINE_ID ]] && [[ -d /boot/${MACHINE_ID} || -L /boot/${MACHINE_ID} ]] ; then
  16     IMG="/boot/${MACHINE_ID}/${KERNEL_VERSION}/initrd"
  17 fi
  18 [[ -f $IMG ]] || IMG="/boot/initramfs-${KERNEL_VERSION}.img"
  19
  20 cd /run/initramfs
  21
  22 [ -f .need_shutdown -a -f "$IMG" ] || exit 1
  23 if $SKIP "$IMG" | zcat | cpio -id --no-absolute-filenames --quiet >/dev/null; then
  24     rm -f -- .need_shutdown
  25 elif $SKIP "$IMG" | xzcat | cpio -id --no-absolute-filenames --quiet >/dev/null; then
  26     rm -f -- .need_shutdown
  27 elif $SKIP "$IMG" | lz4 -d -c | cpio -id --no-absolute-filenames --quiet >/dev/null; then
  28     rm -f -- .need_shutdown
  29 else
  30     # something failed, so we clean up
  31     echo "Unpacking of $IMG to /run/initramfs failed" >&2
  32     rm -f -- /run/initramfs/shutdown
  33     exit 1
  34 fi
  35
  36 exit 0