Merge pull request #233 from YunoHost/ynh_find_port

Nouveau helper ynh_find_port

data/helpers.d/network

@@ -0,0 +1,15 @@
+# Find a free port and return it
+#
+# example: port=$(ynh_find_port 8080)
+#
+# usage: ynh_find_port begin_port
+# | arg: begin_port - port to start to search
+ynh_find_port () {
+	port=$1
+	test -n "$port" || ynh_die "The argument of ynh_find_port must be a valid port."
+	while netcat -z 127.0.0.1 $port       # Check if the port is free
+	do
+		port=$((port+1))	# Else, pass to next port
+	done
+	echo $port
+}