From: Jim Meyering <jim@meyering.net>
Date: Tue, 1 Nov 1994 22:38:11 +0000 (+0000)
Subject: (XWRITE): Guard against calling xwrite with n_bytes == 0.
X-Git-Tag: textutils-1_12_1~483
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=32340b45e70eeff17f153615e8f3e43712cb7ba9;p=thirdparty%2Fcoreutils.git

(XWRITE): Guard against calling xwrite with n_bytes == 0.
---

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)