From 861d0ee4d528a452d042edce848c0580faac83e0 Mon Sep 17 00:00:00 2001
From: Ringo Wantanabe <flandre@chiru.no>
Date: Wed, 20 Jun 2018 01:53:55 +0100
Subject: [PATCH] Initial commit

---
 disk-backup       | 48 +++++++++++++++++++++++++++++++++++++++++++++++
 disk-backup-check | 15 +++++++++++++++
 disk-restore      | 33 ++++++++++++++++++++++++++++++++
 3 files changed, 96 insertions(+)
 create mode 100755 disk-backup
 create mode 100755 disk-backup-check
 create mode 100755 disk-restore

diff --git a/disk-backup b/disk-backup
new file mode 100755
index 0000000..47e0382
--- /dev/null
+++ b/disk-backup
@@ -0,0 +1,48 @@
+#!/bin/bash
+
+sudo echo ">>> Initialising"
+
+PREFIX=$2
+
+if [[ ! "$PREFIX" == "" ]]; then
+	PREFIX=$2-
+fi
+
+if [[ `id -u` == 0 ]]; then
+	echo "WARNING: Running as root? This might not be what you want..."
+fi
+
+ROOT=~/.backups/disk
+
+if [[ ! -d $ROOT ]]; then
+	mkdir -p $ROOT
+fi
+
+if stat "$1"; then
+	OUTPUT=$ROOT/$PREFIX`basename $1`-`date +%Y-%m-%d-%H%M%S`.disk
+	sudo umount "$1" &> /dev/null
+	echo ">>> Will backup disk '$1' to file $OUTPUT"
+	read -p "Is this okay (y/N)? " -n 1 -r
+	echo 
+	if [[ $REPLY =~ ^[Yy]$ ]]; then
+		set -e
+		set -o pipefail
+		if sudo dd "if=$1" conv=sync,noerror status=progress | gzip -9 -c | openssl aes-192-cbc -salt -e > $OUTPUT; then
+			echo ">>> Calculating hash"
+			sha256sum $OUTPUT > $OUTPUT.sha256
+			echo ">>> Signing image"
+			gpg --detach-sign -o $OUTPUT.sig $OUTPUT
+			echo ">>> Setting permissions"
+			sudo chmod 0444 $OUTPUT
+			sudo chmod 0444 $OUTPUT.sha256
+			sudo chmod 0444 $OUTPUT.sig
+			echo ">>> Done"
+		else
+			echo "ERROR - Stopping"
+		fi
+	else
+		echo "Doing nothing"
+	fi
+else
+	echo "ERROR - File not found"
+fi
diff --git a/disk-backup-check b/disk-backup-check
new file mode 100755
index 0000000..4f6177c
--- /dev/null
+++ b/disk-backup-check
@@ -0,0 +1,15 @@
+#!/bin/bash
+
+if [[ -f "$1" ]]; then
+	[[ `stat -c "%a" "$1"` != 444 ]] && echo "WARNING: $1 permissions invalid"
+	[[ `stat -c "%a" "$1.sha256"` != 444 ]] && echo "WARNING: $1.sha256 permissions invalid"
+	if sha256sum -c "$1.sha256" && gpg --verify "$1.sig"; then
+		echo " -> Okay"
+	else
+		echo "ERROR - Validity check failed"
+		exit 1
+	fi
+else
+	echo "ERROR - File not found"
+	exit 1
+fi
diff --git a/disk-restore b/disk-restore
new file mode 100755
index 0000000..0919676
--- /dev/null
+++ b/disk-restore
@@ -0,0 +1,33 @@
+#!/bin/bash
+
+sudo echo ">>> Initialising"
+
+if [[ `id -u` == 0 ]]; then
+	echo "WARNING: Running as root? This might not be what you want..."
+fi
+
+SCRIPTPATH="$( cd "$(dirname "$0")" ; pwd -P )"
+
+echo ">>> Checking validity of image"
+
+if $SCRIPTPATH/disk-backup-check "$1"; then
+	if stat "$2"; then
+		sudo umount "$2" &> /dev/null
+		set -e
+		set -o pipefail
+		echo ">>> Will restore $1 to $2"
+		read -p "Is this okay (y/N)? " -n 1 -r
+		echo
+		if [[ $REPLY =~ ^[Yy]$ ]]; then
+			if cat "$1" | openssl aes-192-cbc -salt -d | gunzip -c | sudo dd conv=sync,noerror "of=$2" status=progress; then
+				echo ">>> Done"
+			else
+				echo "ERROR - Failure, corruption likely"
+			fi
+		else
+			echo "Doing nothing"
+		fi
+	else
+		echo "ERROR - No such device"
+	fi
+fi