improved check() and implemented basic backup feature (untested)

src/paperctl.sh

@@ -12,7 +12,8 @@ show_help(){
 	echo "  -y      | Answer all questions with yes"
 	echo ""
 	echo "-- MODES --"
-	echo "  access  | control over remote access to the device (mac-based-filtering using nftables)"
+	echo "  access    | control over remote access to the device (mac-based-filtering using nftables)"
+	echo "  transfer  | simplified file-transfer with backup-option"
 	exit 0
 }
 
@@ -35,6 +36,19 @@ if [[ "$1" == "access" ]]; then
     exit 0
 fi
 
+if [[ "$1" == "transfer" ]]; then
+
+    shift
+
+    if [[ -x "./sub/transfer.sh" ]]; then
+        ./sub/transfer.sh "$@"
+    else
+        echo "Command 'transfer' not found!" >&2
+        exit 1
+    fi
+    exit 0
+fi
+
 while getopts ":cyhv" opt; do
 	case $opt in
 		c) print_config ;;

src/sub/transfer.sh

@@ -0,0 +1,258 @@
+#!/bin/bash
+
+check_rsync(){
+	if command -v rsync &>/dev/null
+	then
+		echo "rsync is installed. Check passed. Bye."
+		HAD_BEST_SUCCESS="true"
+	else
+		echo "Please install rsync."
+		while [[ -z "$HAD_BEST_SUCCESS" ]]; do
+			read -p "Install now? [y/N] " QUESTION
+			if [[ -z "$QUESTION" ]] || [[ "$QUESTION" = "n" ]] || [[ "$QUESTION" = "N" ]]; then
+				echo "Alright, bye."
+				HAD_BEST_SUCCESS="true"
+			fi
+			if [[ "$QUESTION" = "y" ]] || [[ "$QUESTION" = "Y" ]]; then
+				HAD_BEST_SUCCESS="true"
+				echo "Trying to install rsync..."
+				if command -v apt &>/dev/null
+				then
+					sudo apt update
+					sudo apt install rsync -y
+					echo "Attempted to install rsync. Please execute the check again. Bye."
+				fi
+
+				if command -v dnf &>/dev/null
+				then
+					sudo dnf update
+					sudo dnf install rsync -y
+					echo "Attempted to install rsync. Please execute the check again. Bye."
+				fi
+
+				if command -v pacman &>/dev/null
+				then
+					sudo pacman -S rsync
+					echo "Attempted to install rsync. Please execute the check again. Bye."
+				fi
+			fi
+		done
+
+
+
+	fi
+}
+
+check_openssl(){
+	if command -v openssl &>/dev/null
+	then
+		echo "openssl is installed. Check passed. Bye."
+		HAD_BEST_SUCCESS_O="true"
+	else
+		echo "Please install openssl."
+		while [[ -z "$HAD_BEST_SUCCESS_O" ]]; do
+			read -p "Install now? [y/N] " QUESTION
+			if [[ -z "$QUESTION" ]] || [[ "$QUESTION" = "n" ]] || [[ "$QUESTION" = "N" ]]; then
+				echo "Alright, bye."
+				HAD_BEST_SUCCESS_O="true"
+			fi
+			if [[ "$QUESTION" = "y" ]] || [[ "$QUESTION" = "Y" ]]; then
+				HAD_BEST_SUCCESS_O="true"
+				echo "Trying to install openssl..."
+				if command -v apt &>/dev/null
+				then
+					sudo apt update
+					sudo apt install openssl -y
+					echo "Attempted to install openssl. Please execute the check again. Bye."
+				fi
+
+				if command -v dnf &>/dev/null
+				then
+					sudo dnf update
+					sudo dnf install openssl -y
+					echo "Attempted to install openssl. Please execute the check again. Bye."
+				fi
+
+				if command -v pacman &>/dev/null
+				then
+					sudo pacman -S openssl
+					echo "Attempted to install openssl. Please execute the check again. Bye."
+				fi
+			fi
+		done
+
+
+
+	fi
+}
+
+check_borg(){
+	if command -v borg &>/dev/null
+	then
+		echo "borg is installed. Check passed. Bye."
+		HAD_BEST_SUCCESS_B="true"
+	else
+		echo "Please install borg."
+		while [[ -z "$HAD_BEST_SUCCESS_B" ]]; do
+			read -p "Install now? [y/N] " QUESTION
+			if [[ -z "$QUESTION" ]] || [[ "$QUESTION" = "n" ]] || [[ "$QUESTION" = "N" ]]; then
+				echo "Alright, bye."
+				HAD_BEST_SUCCESS_B="true"
+			fi
+			if [[ "$QUESTION" = "y" ]] || [[ "$QUESTION" = "Y" ]]; then
+				HAD_BEST_SUCCESS_B="true"
+				echo "Trying to install borg..."
+				if command -v apt &>/dev/null
+				then
+					sudo apt update
+					sudo apt install borg -y
+					echo "Attempted to install borg. Please execute the check again. Bye."
+				fi
+
+				if command -v dnf &>/dev/null
+				then
+					sudo dnf update
+					sudo dnf install borg -y
+					echo "Attempted to install borg. Please execute the check again. Bye."
+				fi
+
+				if command -v pacman &>/dev/null
+				then
+					sudo pacman -S borg
+					echo "Attempted to install borg. Please execute the check again. Bye."
+				fi
+			fi
+		done
+
+
+
+	fi
+}
+
+backup_encrypt(){
+	echo "Creating encrypted backup..."
+    	local GEN_PASSPHRASE="$1"   # "gen" oder leer
+
+    	if [[ -z "$SOURCE" || -z "$DESTINATION" ]]; then
+		echo "SOURCE and DESTINATION must be set"
+		return 1
+    	fi
+
+    	if [[ ! -e "$SOURCE" ]]; then
+		echo "Source does not exist: $SOURCE"
+		return 1
+    	fi
+
+    	local PASSPHRASE=""
+    	if [[ "$GEN_PASSPHRASE" == "gen" ]]; then
+		PASSPHRASE="$(openssl rand -base64 48)"
+
+		echo "======================================================"
+		echo "BORG PASSPHRASE (please note down)"
+		echo
+		echo "$PASSPHRASE"
+		echo
+		echo "The phrase won't be shown again and will not be saved."
+		echo "======================================================"
+		echo
+    	fi
+
+    	local ARCHIVE_NAME
+    	ARCHIVE_NAME="backup-$(date +%F_%H-%M-%S)"
+
+    	BORG_PASSPHRASE="$PASSPHRASE" \
+    	borg create \
+		--stats \
+		--progress \
+		--compression lz4 \
+		"$DESTINATION::$ARCHIVE_NAME" \
+		"$SOURCE"
+
+    	local RC=$?
+    	unset BORG_PASSPHRASE
+
+    	if [[ $RC -eq 0 ]]; then
+		echo "Backup successful: $ARCHIVE_NAME"
+	else
+		echo "Backup failed (exit code $RC)"
+    	fi
+
+	exit 0;
+    	return $RC
+}
+
+backup(){
+	if [[ -z "$ENCRYPT" ]]; then
+		backup_encrypt
+		exit 0;
+	fi
+	
+	echo "Creating unencrypted backup..."
+
+    	if [[ -z "$SOURCE" || -z "$DESTINATION" ]]; then
+        	echo "SOURCE and DESTINATION must be set"
+        	return 1
+    	fi
+
+    	if [[ ! -e "$SOURCE" ]]; then
+        	echo "Source does not exist: $SOURCE"
+        	return 1
+    	fi
+
+    	local ARCHIVE_NAME
+    	ARCHIVE_NAME="backup-$(date +%F_%H-%M-%S)"
+
+    	borg create \
+		--stats \
+		--progress \
+		--compression lz4 \
+		"$DESTINATION::$ARCHIVE_NAME" \
+		"$SOURCE"
+
+    	local RC=$?
+
+    	if [[ $RC -eq 0 ]]; then
+        	echo "Unencrypted backup successful: $ARCHIVE_NAME"
+    	else
+        	echo "Backup failed (exit code $RC)"
+    	fi
+
+    	return $RC
+}
+
+
+transfer(){
+	exit 0;
+}
+
+
+show_help(){
+	echo "-- HELP --"
+	echo "  -y                     | Answer all questions with yes"
+	echo "  -s SOURCE              | Source path (e.g. /srv/fileshare/main/)"
+	echo "  -d DESTINATION         | Destination path (e.g. using ssh)"
+	echo "  -b                     | Transfer as backup"
+	echo "  -e                     | encrypt destination using a passphrase"
+	echo "  -h                     | Show this help text"
+	echo "  -v                     | Get Version Info"
+	echo "  -c                     | Check the usability of this tool"
+	exit 0
+}
+
+while getopts ":s:d:Bvhyce" opt; do
+	case $opt in
+		s) SOURCE="$OPTARG";;
+		d) DESTINATION="$OPTARG";;
+		v) exit 0 ;;
+		c) check_rsync; check_borg; check_openssl; exit 0 ;;
+		e) ENCRYPT="1" ;;
+		B) backup ;;
+		h) show_help ;;
+		y) ALWAYS_YES="1" ;;
+		\?) echo "Unknown option: -$OPTARG" >&2; exit 1 ;;
+		:) echo "Option -$OPTARG needs an argument" >&2; exit 1 ;;
+	esac
+done
+
+echo "Nothing to do."
+exit 0