From aa8037be325bcf13995676a9d8a199c96a61e540 Mon Sep 17 00:00:00 2001
From: jca <jca@openbsd.org>
Date: Wed, 8 Jan 2014 17:31:36 +0000
Subject: [PATCH] If the file size is zero, there's nothing to transmit so
 avoid spamming syslog with mmap failures.  Noticed by and ok henning@, "looks
 right" deraadt@

---
 libexec/ftpd/ftpd.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/libexec/ftpd/ftpd.c b/libexec/ftpd/ftpd.c
index fc523178ee7..7bb51247f4c 100644
--- a/libexec/ftpd/ftpd.c
+++ b/libexec/ftpd/ftpd.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ftpd.c,v 1.198 2013/08/22 04:43:40 guenther Exp $	*/
+/*	$OpenBSD: ftpd.c,v 1.199 2014/01/08 17:31:36 jca Exp $	*/
 /*	$NetBSD: ftpd.c,v 1.15 1995/06/03 22:46:47 mycroft Exp $	*/
 
 /*
@@ -1586,6 +1586,12 @@ send_data(FILE *instr, FILE *outstr, off_t blksize, off_t filesize, int isreg)
 		if (isreg && filesize < (off_t)16 * 1024 * 1024) {
 			size_t fsize = (size_t)filesize;
 
+			if (fsize == 0) {
+				transflag = 0;
+				reply(226, "Transfer complete.");
+				return(0);
+			}
+
 			buf = mmap(0, fsize, PROT_READ, MAP_SHARED, filefd,
 			    (off_t)0);
 			if (buf == MAP_FAILED) {
-- 
2.20.1