Use long format options
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@ -7,9 +7,9 @@ EFI_MOUNT_PATH="/boot/efi"
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temp_efi_list_file="/tmp/efibootmgr.label.entry.temp"
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# OS related vars
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ROOT_UUID=$(findmnt -kno UUID /)
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ROOT_FSTYPE=$(findmnt -kno FSTYPE /)
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CRYPT_PART_UUID=$(blkid | sed -n 's;/dev/.*_crypt.*UUID="\(.*\)".*TYPE=.*;\1;p')
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ROOT_UUID=$(findmnt --kernel --noheadings --output UUID -- /)
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ROOT_FSTYPE=$(findmnt --kernel --noheadings --output FSTYPE -- /)
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CRYPT_PART_UUID=$(blkid | sed --silent 's;/dev/.*_crypt.*UUID="\(.*\)".*TYPE=.*;\1;p')
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temp_kernel_list_file="/tmp/kernel.list.temp"
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temp_kernel_command_file="/tmp/kernel.command.temp"
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@ -18,11 +18,11 @@ temp_kernel_command_file="/tmp/kernel.command.temp"
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# Clean old entries {{{
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## Install efibootmgr tool if not available
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command -v efibootmgr > /dev/null || aptitude install -y efibootmgr
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command -v efibootmgr > /dev/null || aptitude install --assume-yes -- efibootmgr
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## Get all old entries list with base label
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rm -f -- "${temp_efi_list_file}" ; touch "${temp_efi_list_file}"
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efibootmgr | grep -E ".*${EFI_BASE_LABEL}.*" | cut -c 5-8 > "${temp_efi_list_file}"
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rm --force -- "${temp_efi_list_file}" ; touch "${temp_efi_list_file}"
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efibootmgr | grep --extended-regexp -- ".*${EFI_BASE_LABEL}.*" | cut --characters=5-8 > "${temp_efi_list_file}"
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## Remove all matching entries
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while IFS= read -r OLD_EFI_ENTRY; do
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@ -44,16 +44,16 @@ find "${EFI_MOUNT_PATH}/EFI/debian" -type f -iname "linux.debian.*.efi" -delete
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# Create unified kernels blob and efiboot entries {{{
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## Install objcopy tool if not available
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command -v objcopy > /dev/null || aptitude install -y binutils
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command -v objcopy > /dev/null || aptitude install --assume-yes -- binutils
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## Put Kernel command line in temp file
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rm -f -- "${temp_kernel_command_file}" ; touch "${temp_kernel_command_file}"
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rm --force -- "${temp_kernel_command_file}" ; touch "${temp_kernel_command_file}"
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printf "%s" "root=UUID=${ROOT_UUID} rootfstype=${ROOT_FSTYPE} add_efi_memmap \
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ro cryptdevice=UUID=${CRYPT_PART_UUID}:lvm" >> "${temp_kernel_command_file}"
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## Get all kernel versions starting with the oldest
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rm -f -- "${temp_kernel_list_file}" ; touch "${temp_kernel_list_file}"
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ls -1tr /boot/vmlinuz-* >> "${temp_kernel_list_file}"
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rm --force -- "${temp_kernel_list_file}" ; touch "${temp_kernel_list_file}"
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ls -1tr -- /boot/vmlinuz-* >> "${temp_kernel_list_file}"
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## For each version of the kernel {{{
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while IFS= read -r KERNEL; do
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@ -61,19 +61,19 @@ while IFS= read -r KERNEL; do
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KERNEL_VERSION=$(printf "%s" "${KERNEL}" | sed 's;.*vmlinuz-\(.*\);\1;')
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### Ensure EFI device is mounted (excluding systemd-automount line)
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if ! mount | grep -v "autofs" | grep --quiet "${EFI_MOUNT_PATH}"; then
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if ! mount | grep --invert-match -- "autofs" | grep --quiet -- "${EFI_MOUNT_PATH}"; then
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mount "${EFI_MOUNT_PATH}" || exit 2
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fi
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ESP=$(findmnt -kno SOURCE "${EFI_MOUNT_PATH}" | grep -v systemd | sed s-/dev/--)
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ESP=$(findmnt -kno SOURCE "${EFI_MOUNT_PATH}" | grep --invert-match -- systemd | sed s-/dev/--)
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ESP_DISK=$(lsblk /dev/"${ESP}" -no pkname)
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ESP_PART=$(cat /sys/class/block/"${ESP}"/partition)
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### Calculate address values to use for each section
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osrel_offs=$(objdump -h "/usr/lib/systemd/boot/efi/linuxx64.efi.stub" | awk 'NF==7 {size=strtonum("0x"$3); offset=strtonum("0x"$4)} END {print size + offset}')
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cmdline_offs=$((osrel_offs + $(stat -Lc%s "/usr/lib/os-release")))
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linux_offs=$((cmdline_offs + $(stat -Lc%s "${temp_kernel_command_file}")))
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initrd_offs=$((linux_offs + $(stat -Lc%s "/boot/vmlinuz-6.3.0-1-amd64")))
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osrel_offs=$(objdump --section-headers -- "/usr/lib/systemd/boot/efi/linuxx64.efi.stub" | awk 'NF==7 {size=strtonum("0x"$3); offset=strtonum("0x"$4)} END {print size + offset}')
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cmdline_offs=$((osrel_offs + $(stat --dereference --format=%s -- "/usr/lib/os-release")))
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linux_offs=$((cmdline_offs + $(stat --dereference --format=%s -- "${temp_kernel_command_file}")))
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initrd_offs=$((linux_offs + $(stat --dereference --format=%s -- "/boot/vmlinuz-${KERNEL_VERSION}")))
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### Create a unified kernel
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@ -111,6 +111,6 @@ efibootmgr --disk /dev/"${ESP_DISK}" --part "${ESP_PART}" --create --label "${EF
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# }}}
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## Remove temp files
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rm -f -- "${temp_efi_list_file}" "${temp_kernel_list_file}" "${temp_kernel_command_file}"
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rm --force -- "${temp_efi_list_file}" "${temp_kernel_list_file}" "${temp_kernel_command_file}"
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exit 0
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