dracut-initramfs-restore.sh

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