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#!/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 [[ -f /etc/machine-id ]] && read MACHINE_ID < /etc/machine-id mount -o ro /boot &>/dev/null || true if [[ $MACHINE_ID ]] && [[ -d /boot/${MACHINE_ID} || -L /boot/${MACHINE_ID} ]] ; then IMG="/boot/${MACHINE_ID}/${KERNEL_VERSION}/initrd" fi [[ -f $IMG ]] || IMG="/boot/initramfs-${KERNEL_VERSION}.img" cd /run/initramfs [ -f .need_shutdown -a -f "$IMG" ] || exit 1 if $SKIP "$IMG" | zcat | cpio -id --no-absolute-filenames --quiet >/dev/null; then rm -f -- .need_shutdown elif $SKIP "$IMG" | xzcat | cpio -id --no-absolute-filenames --quiet >/dev/null; then rm -f -- .need_shutdown elif $SKIP "$IMG" | lz4 -d -c | cpio -id --no-absolute-filenames --quiet >/dev/null; then rm -f -- .need_shutdown elif $SKIP "$IMG" | zstd -d -c | 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 unsquashfs -no-xattrs -f -d . squash-root.img >/dev/null if [ $? -ne 0 ]; 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 exit 0
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