check that we got the port before trying to listen

pr 2436; Alexander Yurchenko <grange@rt.mipt.ru>

1 files changed, 2 insertions, 2 deletions

diff --git a/src/usr.bin/nc/netcat.c b/src/usr.bin/nc/netcat.c
index dc4fe9e37d..da57c3239a 100644
--- a/src/usr.bin/nc/netcat.c
+++ b/src/usr.bin/nc/netcat.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: netcat.c,v 1.46 2002/02/28 18:05:36 markus Exp $ */
+/* $OpenBSD: netcat.c,v 1.47 2002/03/10 20:26:09 ericj Exp $ */
 /*
  * Copyright (c) 2001 Eric Jackson <ericj@monkey.org>
  *
@@ -512,7 +512,7 @@ local_listen(char *host, char *port, struct addrinfo hints)
                 s = -1;
         } while ((res0 = res0->ai_next) != NULL);
 
-        if (!uflag) {
+        if (!uflag && s != -1) {
                 if (listen(s, 1) < 0)
                         errx(1, "%s", strerror(errno));
         }