Imported Upstream version 1.3upstream/1.3

1 files changed, 8 insertions, 0 deletions

diff --git a/src/pkg/os/file.go b/src/pkg/os/file.go
index 2dd1fcf28..b4a745801 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)
 
@@ -247,3 +250,8 @@ func Create(name string) (file *File, err error) {
 
 // lstat is overridden in tests.
 var lstat = Lstat
+
+// Rename renames (moves) a file. OS-specific restrictions might apply.
+func Rename(oldpath, newpath string) error {
+	return rename(oldpath, newpath)
+}