removing backup script
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cnst
@@ -1,260 +0,0 @@
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#!/usr/bin/env bash
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# Script to clean up old initrd and kernel files in /boot/EFI/nixos
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# Exit on any error, undefined variable, or pipeline failure
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set -euo pipefail
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# Ensure Bash 4 or newer is being used
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if ((BASH_VERSINFO[0] < 4)); then
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echo "Error: This script requires Bash version 4 or higher."
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exit 1
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fi
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# Default number of versions and files to keep
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KEEP_KERNEL=4
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KEEP_INITRD=6
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# Log file for cleanup actions
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LOG_FILE="/var/log/cleanup-boot.log"
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# Dry run flag
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DRY_RUN=false
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# Function to display usage information
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usage() {
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echo "Usage: $0 [--dry-run] [--keep-kernel N] [--keep-initrd N] [--help]"
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echo
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echo "Options:"
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echo " --dry-run Perform a trial run with no changes made."
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echo " --keep-kernel N Keep the latest N kernel files (default: 4)."
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echo " --keep-initrd N Keep the latest N initrd files (default: 6)."
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echo " --help, -h Show this help message."
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echo
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echo "Examples:"
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echo " ./cleanup-boot.sh --dry-run"
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echo " ./cleanup-boot.sh --keep-kernel 3 --keep-initrd 5"
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exit 1
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}
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# Parse command-line arguments
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while [[ "$#" -gt 0 ]]; do
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case "$1" in
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--dry-run)
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DRY_RUN=true
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;;
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--keep-kernel)
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if [[ -n "${2:-}" && "$2" =~ ^[1-9][0-9]*$ ]]; then
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KEEP_KERNEL="$2"
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shift
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else
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echo "Error: --keep-kernel requires a positive integer."
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usage
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fi
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;;
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--keep-initrd)
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if [[ -n "${2:-}" && "$2" =~ ^[1-9][0-9]*$ ]]; then
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KEEP_INITRD="$2"
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shift
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else
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echo "Error: --keep-initrd requires a positive integer."
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usage
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fi
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;;
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--help | -h)
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usage
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;;
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*)
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echo "Unknown option: $1"
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usage
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;;
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esac
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shift
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done
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# Check for root privileges
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if [ "$EUID" -ne 0 ]; then
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echo "Error: Please run as root."
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exit 1
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fi
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# Check if log file is writable
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if ! touch "$LOG_FILE" &>/dev/null; then
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echo "Error: Cannot write to log file $LOG_FILE"
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exit 1
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fi
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# Function to log messages with timestamps
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log() {
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local message
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message="$(date '+%Y-%m-%d %H:%M:%S') - $1"
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echo "$message" | tee -a "$LOG_FILE"
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logger -t cleanup-boot "$message"
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}
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log "Starting cleanup script. Keeping $KEEP_KERNEL kernel files and $KEEP_INITRD initrd files."
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# Collect all .efi files in /boot/EFI/nixos
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mapfile -d '' -t efi_files < <(find /boot/EFI/nixos -type f -name '*.efi' -print0)
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declare -A kernels_files_by_version
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declare -A initrds_files_by_version
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declare -A versions_mtime
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# Parse filenames to group kernel and initrd files by their version number
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for file in "${efi_files[@]}"; do
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basename=$(basename "$file")
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# Pattern 1: <hash>-linux-<version>-bzImage.efi (kernel)
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if [[ "$basename" =~ ^(.*)-linux-([0-9]+\.[0-9]+\.[0-9]+(-[a-zA-Z0-9\.\+]+)?)-bzImage\.efi$ ]]; then
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version="${BASH_REMATCH[2]}"
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type="kernel"
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# Pattern 1: <hash>-initrd-linux-<version>-initrd.efi (initrd)
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elif [[ "$basename" =~ ^(.*)-initrd-linux-([0-9]+\.[0-9]+\.[0-9]+(-[a-zA-Z0-9\.\+]+)?)-initrd\.efi$ ]]; then
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version="${BASH_REMATCH[2]}"
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type="initrd"
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# Pattern 2: kernel-<version>-<hash>.efi (kernel)
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elif [[ "$basename" =~ ^kernel-([0-9]+\.[0-9]+\.[0-9]+(-[a-zA-Z0-9\.\+]+)?)-([a-zA-Z0-9]+)\.efi$ ]]; then
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version="${BASH_REMATCH[1]}"
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type="kernel"
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# Pattern 2: initrd-<version>-<hash>.efi (initrd)
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elif [[ "$basename" =~ ^initrd-([0-9]+\.[0-9]+\.[0-9]+(-[a-zA-Z0-9\.\+]+)?)-([a-zA-Z0-9]+)\.efi$ ]]; then
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version="${BASH_REMATCH[1]}"
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type="initrd"
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else
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log "Warning: Unrecognized filename format: $basename"
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continue
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fi
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# Get file modification time
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if ! file_mtime=$(stat -c '%Y' "$file" 2>/dev/null); then
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log "Warning: Failed to get modification time for $file"
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continue
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fi
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# Append the file to the list of files per version and type
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entry="$file_mtime|$file"
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if [[ "$type" == "kernel" ]]; then
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kernels_files_by_version["$version"]+="$entry"$'\n'
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elif [[ "$type" == "initrd" ]]; then
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initrds_files_by_version["$version"]+="$entry"$'\n'
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fi
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# Update the latest modification time for the version
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version_mtime="${versions_mtime["$version"]:-0}"
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if [[ "$file_mtime" -gt "$version_mtime" ]]; then
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versions_mtime["$version"]="$file_mtime"
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fi
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done
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# Collect all versions
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all_versions=("${!versions_mtime[@]}")
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# Sort versions by their latest modification time (newest first)
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mapfile -t sorted_versions < <(
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for version in "${all_versions[@]}"; do
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echo "${versions_mtime[$version]}:$version"
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done | sort -rn -k1,1 | awk -F: '{print $2}'
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)
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version_count=${#sorted_versions[@]}
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log "Found $version_count versions."
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if [ "$version_count" -eq 0 ]; then
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log "No versions found."
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exit 0
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fi
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# Initialize delete_files array
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delete_files=()
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# Log the files identified for deletion
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log "Files identified for deletion:"
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# Process initrd files
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for version in "${sorted_versions[@]}"; do
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initrd_files="${initrds_files_by_version["$version"]:-}"
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if [ -n "$initrd_files" ]; then
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IFS=''
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mapfile -t initrd_files_array <<<"$initrd_files"
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unset IFS
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# Sort initrd files by mtime and filename (newest first)
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mapfile -t sorted_initrd_files < <(printf '%s\n' "${initrd_files_array[@]}" | sort -rn -k1,1 -k2,2)
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initrd_file_count=${#sorted_initrd_files[@]}
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if [ "$KEEP_INITRD" -gt 0 ] && [ "$initrd_file_count" -gt "$KEEP_INITRD" ]; then
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files_to_delete=("${sorted_initrd_files[@]:$KEEP_INITRD}")
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for entry in "${files_to_delete[@]}"; do
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file="${entry#*|}"
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delete_files+=("$file")
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log "$file"
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done
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fi
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fi
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done
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# Process kernel files
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for version in "${sorted_versions[@]}"; do
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kernel_files="${kernels_files_by_version["$version"]:-}"
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if [ -n "$kernel_files" ]; then
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IFS=''
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mapfile -t kernel_files_array <<<"$kernel_files"
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unset IFS
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# Sort kernel files by mtime and filename (newest first)
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mapfile -t sorted_kernel_files < <(printf '%s\n' "${kernel_files_array[@]}" | sort -rn -k1,1 -k2,2)
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kernel_file_count=${#sorted_kernel_files[@]}
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if [ "$KEEP_KERNEL" -gt 0 ] && [ "$kernel_file_count" -gt "$KEEP_KERNEL" ]; then
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files_to_delete=("${sorted_kernel_files[@]:$KEEP_KERNEL}")
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for entry in "${files_to_delete[@]}"; do
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file="${entry#*|}"
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delete_files+=("$file")
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log "$file"
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done
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fi
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fi
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done
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if [ ${#delete_files[@]} -eq 0 ]; then
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log "No files to delete."
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exit 0
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fi
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# Confirm dry run mode
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if [ "$DRY_RUN" = true ]; then
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log "Dry run mode enabled. No files will be deleted."
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fi
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# Remove old files
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for file in "${delete_files[@]}"; do
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# Skip empty entries
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if [[ -z "$file" ]]; then
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continue
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fi
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# Resolve absolute path
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resolved_file=$(realpath "$file")
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# Security check: Ensure the file is within /boot/EFI/nixos
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if [[ "$resolved_file" != /boot/EFI/nixos/* ]]; then
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log "Warning: Attempted to delete file outside of /boot/EFI/nixos: $resolved_file"
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continue
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fi
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if [ "$DRY_RUN" = false ]; then
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if rm -f -- "$resolved_file"; then
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log "Deleted: $resolved_file"
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else
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log "Failed to delete: $resolved_file"
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fi
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else
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log "Dry run - would delete: $resolved_file"
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fi
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done
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log "Cleanup script completed."
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