resetbackups.sh: Clearing apple time machine history

resetbackups.sh

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+#!/bin/bash
+
+# usage: "sudo ./resetbackups.sh"
+# deletes all time machine backups except the latest one, thus removing all history.
+# the time machine storage must be mounted when the script runs.
+
+[[ $EUID -ne 0 ]] && { echo "Error: Must run as root."; exit 1; }
+
+computername="$(scutil --get ComputerName)"
+cd "/Volumes/Time Machine Backups/Backups.backupdb/${computername}"
+[ $? -ne 0 ] && { echo "Error: Unable to access Time Machine backup storage."; exit 1; }
+
+ls
+
+files=($(ls))
+
+if [ ${#files[@]} -le 2 ]; then
+	echo "Only one backup, skipping..."
+	exit
+fi
+
+MAX=${#files[@]}
+(( MAX = MAX - 2 ))
+START=0
+echo "* Backups to delete: $MAX"
+while :; do
+	(( NONZEROSTART = START + 1 ))
+	echo ". ${NONZEROSTART}/${MAX}: ${files[$START]}"
+	tmutil delete "${files[$START]}"
+	if [ $? -ne 0 ]; then
+		# error happened, or user pressed Ctrl+C
+		echo "Aborting..."
+		break
+	fi
+
+	(( START = START + 1 ))
+	if [ $START -ge $MAX ]; then
+		break
+	fi
+done