core: improve log message about missing Listen setting (#4988)

Fixes: #4987

diff --git a/src/core/socket.c b/src/core/socket.c
index 0960a300393fc86159022217a73eb82e1c95bb87..b88bd512458b0e8ca99cb2b73d82fd048cdb8a3e 100644 (file)
--- a/src/core/socket.c
+++ b/src/core/socket.c
@@ -448,7 +448,7 @@ static int socket_verify(Socket *s) {
                 return 0;
 
         if (!s->ports) {
-                log_unit_error(UNIT(s), "Unit lacks Listen setting. Refusing.");
+                log_unit_error(UNIT(s), "Unit has no Listen setting (e.g. ListenStream=, ListenDatagram=, ListenFIFO, ...). Refusing.");
                 return -EINVAL;
         }