From: Russ Cox <rsc@golang.org>
Date: Tue, 22 Nov 2011 17:22:28 +0000 (-0500)
Subject: os: make ReadAt comment clearer
X-Git-Tag: weekly.2011-12-01~80
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=c69d6345daf277b947341ba958458b0a500effe1;p=gostls13.git

os: make ReadAt comment clearer

Fixes #2486.

R=golang-dev, hanwen
CC=golang-dev
https://golang.org/cl/5417064
---

diff --git a/src/pkg/os/file.go b/src/pkg/os/file.go
index 386afb889b..6a8d346f5c 100644
--- a/src/pkg/os/file.go
+++ b/src/pkg/os/file.go
@@ -70,8 +70,8 @@ func (file *File) Read(b []byte) (n int, err error) {
 
 // ReadAt reads len(b) bytes from the File starting at byte offset off.
 // It returns the number of bytes read and the error, if any.
-// EOF is signaled by a zero count with err set to io.EOF.
-// ReadAt always returns a non-nil error when n != len(b).
+// ReadAt always returns a non-nil error when n < len(b).
+// At end of file, that error is io.EOF.
 func (file *File) ReadAt(b []byte, off int64) (n int, err error) {
 	if file == nil {
 		return 0, EINVAL