From b880c7af2f466306d44229e9dca1afaf9ac91023 Mon Sep 17 00:00:00 2001
From: Radim Kolar <hsn@sendmail.cz>
Date: Wed, 29 Apr 2020 08:06:26 +0200
Subject: [PATCH] improve error message when we can't listen on port

---
 ChangeLog     | 1 +
 server/main.c | 4 +++-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index ea2b93e..53104aa 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,5 @@
 Version NEXT
+	display port number if we can't listen on it
 
 Version 2.8.1b29 - 24 Aug 2019
         added scons command line argument without-fspscan=yes for building
diff --git a/server/main.c b/server/main.c
index 11dd53f..5301132 100644
--- a/server/main.c
+++ b/server/main.c
@@ -243,7 +243,9 @@ int main (int argc, char ** argv)
   {
     opt=_x_udp(listen_on,&udp_port);
     if(opt == -1) {
-    perror("Error: socket open");
+    fprintf(stderr,"can't listen on port %d: ",udp_port);
+    fflush(stderr);
+    perror("");
     exit(2);
     }
     if(dbug) {