Add client export option

- Add an option to export configuration for an existing client.

openvpn-install.sh

@@ -538,11 +538,12 @@ else
 	echo
 	echo "Select an option:"
 	echo "   1) Add a new client"
-	echo "   2) Revoke an existing client"
-	echo "   3) Remove OpenVPN"
-	echo "   4) Exit"
+	echo "   2) Export configuration for an existing client"
+	echo "   3) Revoke an existing client"
+	echo "   4) Remove OpenVPN"
+	echo "   5) Exit"
 	read -p "Option: " option
-	until [[ "$option" =~ ^[1-4]$ ]]; do
+	until [[ "$option" =~ ^[1-5]$ ]]; do
 		echo "$option: invalid selection."
 		read -p "Option: " option
 	done
@@ -569,6 +570,27 @@ else
 			exit
 		;;
 		2)
+			number_of_clients=$(tail -n +2 /etc/openvpn/server/easy-rsa/pki/index.txt | grep -c "^V")
+			if [[ "$number_of_clients" = 0 ]]; then
+				echo
+				echo "There are no existing clients!"
+				exit
+			fi
+			echo
+			echo "Select the client to export:"
+			tail -n +2 /etc/openvpn/server/easy-rsa/pki/index.txt | grep "^V" | cut -d '=' -f 2 | nl -s ') '
+			read -p "Client: " client_number
+			until [[ "$client_number" =~ ^[0-9]+$ && "$client_number" -le "$number_of_clients" ]]; do
+				echo "$client_number: invalid selection."
+				read -p "Client: " client_number
+			done
+			client=$(tail -n +2 /etc/openvpn/server/easy-rsa/pki/index.txt | grep "^V" | cut -d '=' -f 2 | sed -n "$client_number"p)
+			new_client
+			echo
+			echo "$client exported. Configuration available in: $export_dir$client.ovpn"
+			exit
+		;;
+		3)
 			# This option could be documented a bit better and maybe even be simplified
 			# ...but what can I say, I want some sleep too
 			number_of_clients=$(tail -n +2 /etc/openvpn/server/easy-rsa/pki/index.txt | grep -c "^V")
@@ -611,7 +633,7 @@ else
 			fi
 			exit
 		;;
-		3)
+		4)
 			echo
 			read -p "Confirm OpenVPN removal? [y/N]: " remove
 			until [[ "$remove" =~ ^[yYnN]*$ ]]; do
@@ -671,7 +693,7 @@ else
 			fi
 			exit
 		;;
-		4)
+		5)
 			exit
 		;;
 	esac