From: Christopher Faylor <me@cgf.cx>
Date: Wed, 14 Nov 2001 04:12:11 +0000 (+0000)
Subject: * syscalls.cc (_write): Allow zero length as per SUSv2.
X-Git-Tag: cygnus_cvs_20020108_pre~166
X-Git-Url: https://sourceware.org/git/?a=commitdiff_plain;h=65814395b660eb3a58c3776606b6323c2386d044;p=newlib-cygwin.git

* syscalls.cc (_write): Allow zero length as per SUSv2.
---

diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index ba6e5ea05..ad64ad241 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,7 @@
+2001-11-13  Christopher Faylor  <cgf@redhat.com>
+
+	* syscalls.cc (_write): Allow zero length as per SUSv2.
+
 2001-11-13  Corinna Vinschen  <corinna@vinschen.de>
 
 	* dir.cc (mkdir): Add HIDDEN file attribute if file has leading dot
diff --git a/winsup/cygwin/syscalls.cc b/winsup/cygwin/syscalls.cc
index 307d61885..848e0e44f 100644
--- a/winsup/cygwin/syscalls.cc
+++ b/winsup/cygwin/syscalls.cc
@@ -355,6 +355,9 @@ _read (int fd, void *ptr, size_t len)
 extern "C" ssize_t
 _write (int fd, const void *ptr, size_t len)
 {
+  if (len == 0)
+    return 0;
+
   if (__check_invalid_read_ptr_errno (ptr, len))
     return -1;