From: Jim Meyering <jim@meyering.net>
Date: Tue, 1 Nov 1994 22:21:23 +0000 (+0000)
Subject: (XWRITE): Allow n_bytes to be zero in assertion.  Otherwise `tail /dev/null'
X-Git-Tag: textutils-1_12_1~484
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=7a5462a0b71b8b6bfe5f71cad341f2a149aa0535;p=thirdparty%2Fcoreutils.git

(XWRITE): Allow n_bytes to be zero in assertion.  Otherwise `tail /dev/null'
gets failed assertion.
---

diff --git a/src/tail.c b/src/tail.c
index 87983253c0..138f93a0c4 100644
--- a/src/tail.c
+++ b/src/tail.c
@@ -54,14 +54,14 @@
 #include "system.h"
 #include "version.h"
 
-/* FIXME: uncomment before release.  */
-/* #define NDEBUG 1 */
+/* Disable assertions.  Some systems have broken assert macros.  */
+#define NDEBUG 1
 
 #define XWRITE(fd, buffer, n_bytes)					\
   do									\
     {									\
       assert ((fd) == 1);						\
-      assert ((n_bytes) > 0);						\
+      assert ((n_bytes) >= 0);						\
       if (fwrite ((buffer), 1, (n_bytes), stdout) == 0)			\
 	error (1, errno, "write error");				\
     }									\