From 32340b45e70eeff17f153615e8f3e43712cb7ba9 Mon Sep 17 00:00:00 2001
From: Jim Meyering <jim@meyering.net>
Date: Tue, 1 Nov 1994 22:38:11 +0000
Subject: [PATCH] (XWRITE): Guard against calling xwrite with n_bytes == 0.

---
 src/tail.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/tail.c b/src/tail.c
index 138f93a0c4..7fccd9e3a0 100644
--- a/src/tail.c
+++ b/src/tail.c
@@ -62,7 +62,7 @@
     {									\
       assert ((fd) == 1);						\
       assert ((n_bytes) >= 0);						\
-      if (fwrite ((buffer), 1, (n_bytes), stdout) == 0)			\
+      if (n_bytes > 0 && fwrite ((buffer), 1, (n_bytes), stdout) == 0)	\
 	error (1, errno, "write error");				\
     }									\
   while (0)
-- 
2.47.3