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