Use appropiate exit code when failing

Currently, we use the 0 status code, doesn't matter if it's a failure or not, so lets fix it.

files/tor-router

@@ -9,7 +9,7 @@ case "$1" in
 start)
 	if test -f "$RULES"; then
 		echo "$RULES exists. Either delete it, or stop tor-router first."
-	    exit
+		exit 1
 	else
 		iptables-save >$RULES
 		# Executable file to create rules for transparent proxy
@@ -24,18 +24,18 @@ case "$1" in
 			TOR_UID=$(id -u toranon)
 		else
 			echo "Unknown distro, please create report the issue to https://github.com/edu4rdshl/tor-router/issues"
-		exit
+			exit 1
 		fi
 
 		if ! command -v tor >/dev/null; then
 			echo "You need to install the tor package."
-		exit
+			exit 1
 		elif ! systemctl is-active tor.service >/dev/null; then
 			echo "The tor service is not active, please start the tor service before running the script."
-		exit
+			exit 1
 		elif ! command -v iptables >/dev/null; then
 			echo "You need to install the iptables package."
-		exit
+			exit 1
 		else
 			iptables -F
 			iptables -t nat -F
@@ -76,4 +76,5 @@ case "$1" in
 	;;
 *)
 	echo "Usage: $0 {start|stop|restart}"
+	;;
 esac