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#!/bin/bash validate_inputs() { if [[ -z "$BACKUP_DIR" || -z "$COMPRESSION" || -z "$BACKUP_DEST" ]]; then echo "Error: Missing arguments." echo "Usage: $0 -d <directory_to_backup> -c <zip|tar> -o <backup_destination>" exit 1 fi if [[ ! -d "$BACKUP_DIR" ]]; then echo "Error: Directory $BACKUP_DIR does not exist!" exit 1 fi if [[ -d "$BACKUP_DEST" ]]; then if [[ ! -w "$BACKUP_DEST" ]]; then echo "Error: Backup destination $BACKUP_DEST is not writable!" exit 1 fi else echo "creating backup destination directory $BACKUP_DEST" mkdir -p "$BACKUP_DEST" if [[ $? -ne 0 ]]; then echo "Error: Failed to create backup destination directory $BACKUP_DEST!" exit 1 fi chmod 755 "$BACKUP_DEST" fi if [[ "$COMPRESSION" != "zip" && "$COMPRESSION" != "tar" ]]; then echo "Error: Invalid compression method. Use 'zip' or 'tar'." exit 1 fi } perform_backup() { } clean_old_backups() { } while getopts "d:c:o:" opt; do case ${opt} in d ) BACKUP_DIR=$OPTARG ;; c ) COMPRESSION=$OPTARG ;; o ) BACKUP_DEST=$OPTARG ;; esac done validate_inputs perform_backup clean_old_backups
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