implemented basic structure and check()-method

src/sub/access.sh

@@ -1,4 +1,85 @@
 #!/bin/bash
 
-echo "currently not implemented"
+allow_mac(){
+	echo "Allowing $MAC"
+	exit 0
+}
+
+check(){
+	if command -v iptables &>/dev/null
+	then
+		echo "iptables is installed. Check passed. Bye."
+		exit 0;
+	else
+		echo "Please install iptables."
+		while [[ -z "$HAD_BEST_SUCCESS" ]]; do
+			read -p "Install now? [y/N] " QUESTION
+			if [[ -z "$QUESTION" ]] || [[ "$QUESTION" = "n" ]] || [[ "$QUESTION" = "N" ]]; then
+				echo "Alright, bye."
+				exit 0;
+			fi
+			if [[ "$QUESTION" = "y" ]] || [[ "$QUESTION" = "Y" ]]; then
+				HAD_BEST_SUCCESS="true"
+				echo "Trying to install iptables..."
+				if command -v apt &>/dev/null
+				then
+					sudo apt update
+					sudo apt install iptables -y
+					echo "Attempted to install iptables. Please execute the check again. Bye."
+					exit 0;
+				fi
+
+				if command -v dnf &>/dev/null
+				then
+					sudo dnf update
+					sudo dnf install iptables -y
+					echo "Attempted to install iptables. Please execute the check again. Bye."
+					exit 0;
+				fi
+
+				if command -v pacman &>/dev/null
+				then
+					sudo pacman -S iptables
+					echo "Attempted to install iptables. Please execute the check again. Bye."
+					exit 0;
+				fi
+			fi
+		done
+
+
+
+	fi
+}
+
+
+deny_mac(){
+	echo "Denying $MAC"
+	exit 0
+}
+
+show_help(){
+	echo "-- HELP --"
+	echo "  -a AA:AA:AA:AA:AA:AA   | Allow the access for the given mac-address"
+	echo "  -d AA:AA:AA:AA:AA:AA   | Deny the access for the given mac-address"
+	echo "  -y                     | Answer all questions with yes"
+	echo "  -h                     | Show this help text"
+	echo "  -v                     | Get Version Info"
+	echo "  -c                     | Check the usability of this tool"
+	exit 0
+}
+
+while getopts ":a:d:vhyc" opt; do
+	case $opt in
+		a) MAC="$OPTARG"; allow_mac ;;
+		d) MAC="$OPTARG"; deny_mac ;;
+		v) exit 0 ;;
+		c) check ;;
+		h) show_help ;;
+		y) ALWAYS_YES="1" ;;
+		\?) echo "Unknown option: -$OPTARG" >&2; exit 1 ;;
+		:) echo "Option -$OPTARG needs an argument" >&2; exit 1 ;;
+	esac
+done
+
+echo "Nothing to do."
 exit 0