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#!/usr/bin/bash
set -e
# do some sanity checks first
[ -e /run/initramfs/bin/sh ] && exit 0
[ -e /run/initramfs/.need_shutdown ] || exit 0
# SIGTERM signal is received upon forced shutdown: ignore the signal
# We want to remain alive to be able to trap unpacking errors to avoid
# switching root to an incompletely unpacked initramfs
trap 'echo "Received SIGTERM signal, ignoring!" >&2' TERM
KERNEL_VERSION="$(uname -r)"
[[ $dracutbasedir ]] || dracutbasedir=/usr/lib/dracut
SKIP="$dracutbasedir/skipcpio"
[[ -x $SKIP ]] || SKIP="cat"
if [[ -d /efi/Default ]] || [[ -d /boot/Default ]] || [[ -d /boot/efi/Default ]]; then
MACHINE_ID="Default"
elif [[ -f /etc/machine-id ]]; then
read -r MACHINE_ID < /etc/machine-id
else
MACHINE_ID="Default"
fi
mount -o ro /boot &> /dev/null || true
if [[ -d /efi/loader/entries || -L /efi/loader/entries ]] \
&& [[ -d /efi/$MACHINE_ID || -L /efi/$MACHINE_ID ]]; then
IMG="/efi/${MACHINE_ID}/${KERNEL_VERSION}/initrd"
elif [[ -d /boot/loader/entries || -L /boot/loader/entries ]] \
&& [[ -d /boot/$MACHINE_ID || -L /boot/$MACHINE_ID ]]; then
IMG="/boot/${MACHINE_ID}/${KERNEL_VERSION}/initrd"
elif [[ -d /boot/efi/loader/entries || -L /boot/efi/loader/entries ]] \
&& [[ -d /boot/efi/$MACHINE_ID || -L /boot/efi/$MACHINE_ID ]]; then
IMG="/boot/efi/$MACHINE_ID/$KERNEL_VERSION/initrd"
elif [[ -f /lib/modules/${KERNEL_VERSION}/initrd ]]; then
IMG="/lib/modules/${KERNEL_VERSION}/initrd"
elif [[ -f /boot/initramfs-${KERNEL_VERSION}.img ]]; then
IMG="/boot/initramfs-${KERNEL_VERSION}.img"
elif mountpoint -q /efi; then
IMG="/efi/$MACHINE_ID/$KERNEL_VERSION/initrd"
elif mountpoint -q /boot/efi; then
IMG="/boot/efi/$MACHINE_ID/$KERNEL_VERSION/initrd"
else
echo "No initramfs image found to restore!"
exit 1
fi
cd /run/initramfs
if $SKIP "$IMG" | zcat | cpio -id --no-absolute-filenames --quiet > /dev/null \
|| $SKIP "$IMG" | bzcat | cpio -id --no-absolute-filenames --quiet > /dev/null \
|| $SKIP "$IMG" | xzcat | cpio -id --no-absolute-filenames --quiet > /dev/null \
|| $SKIP "$IMG" | lz4 -d -c | cpio -id --no-absolute-filenames --quiet > /dev/null \
|| $SKIP "$IMG" | lzop -d -c | cpio -id --no-absolute-filenames --quiet > /dev/null \
|| $SKIP "$IMG" | zstd -d -c | cpio -id --no-absolute-filenames --quiet > /dev/null \
|| $SKIP "$IMG" | cpio -id --no-absolute-filenames --quiet > /dev/null; then
rm -f -- .need_shutdown
else
# something failed, so we clean up
echo "Unpacking of $IMG to /run/initramfs failed" >&2
rm -f -- /run/initramfs/shutdown
exit 1
fi
if [[ -d squash ]]; then
if ! unsquashfs -no-xattrs -f -d . squash-root.img > /dev/null; then
echo "Squash module is enabled for this initramfs but failed to unpack squash-root.img" >&2
rm -f -- /run/initramfs/shutdown
exit 1
fi
fi
if [ -e /etc/selinux/config -a -x /usr/sbin/setfiles ]; then
. /etc/selinux/config
[ -n "${SELINUXTYPE}" ] && /usr/sbin/setfiles -v -r /run/initramfs /etc/selinux/"${SELINUXTYPE}"/contexts/files/file_contexts /run/initramfs > /dev/null
fi
exit 0