From aa0ae7554c460947ff40ae43eb10a098dc4e3f6d Mon Sep 17 00:00:00 2001
From: Shenghou Ma <minux.ma@gmail.com>
Date: Mon, 9 Dec 2013 23:25:13 -0500
Subject: [PATCH] os: clarify docs for Rename.

Three changes:
1. mention "move" to clarify things up.
2. use {old,new}path instead of {old,new}name, which makes it clear what
   relative path would do here.
3. mention "OS-specific restrictions might apply".

Fixes #6887.

R=golang-dev, alex.brainman, iant, r
CC=golang-dev
https://golang.org/cl/36930044
---
 src/pkg/os/file.go       | 3 +++
 src/pkg/os/file_plan9.go | 3 +--
 src/pkg/os/file_posix.go | 3 +--
 3 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/src/pkg/os/file.go b/src/pkg/os/file.go
index 2dd1fcf282f65a..18cd61d3a8491d 100644
--- a/src/pkg/os/file.go
+++ b/src/pkg/os/file.go
@@ -140,6 +140,9 @@ func (f *File) Write(b []byte) (n int, err error) {
 	if n < 0 {
 		n = 0
 	}
+	if n != len(b) {
+		err = io.ErrShortWrite
+	}
 
 	epipecheck(f, e)
 
diff --git a/src/pkg/os/file_plan9.go b/src/pkg/os/file_plan9.go
index 708163ee1c08da..278fae772cec71 100644
--- a/src/pkg/os/file_plan9.go
+++ b/src/pkg/os/file_plan9.go
@@ -313,8 +313,7 @@ func Remove(name string) error {
 	return nil
 }
 
-// Rename renames a file.
-func Rename(oldname, newname string) error {
+func rename(oldname, newname string) error {
 	var d syscall.Dir
 
 	d.Null()
diff --git a/src/pkg/os/file_posix.go b/src/pkg/os/file_posix.go
index a8bef359b95b29..90838682b683ef 100644
--- a/src/pkg/os/file_posix.go
+++ b/src/pkg/os/file_posix.go
@@ -48,8 +48,7 @@ func Readlink(name string) (string, error) {
 	}
 }
 
-// Rename renames a file.
-func Rename(oldname, newname string) error {
+func rename(oldname, newname string) error {
 	e := syscall.Rename(oldname, newname)
 	if e != nil {
 		return &LinkError{"rename", oldname, newname, e}