libgo: Update to go1.6rc1.

    
    Reviewed-on: https://go-review.googlesource.com/19200


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@233110 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 6 insertions, 6 deletions

diff --git a/libgo/go/os/file.go b/libgo/go/os/file.go
index 8c0e3ffe1ba..4f8e3f3450c 100644
--- a/libgo/go/os/file.go
+++ b/libgo/go/os/file.go
@@ -52,8 +52,8 @@ var (
 	Stderr = NewFile(uintptr(syscall.Stderr), "/dev/stderr")
 )
 
-// Flags to Open wrapping those of the underlying system. Not all flags
-// may be implemented on a given system.
+// Flags to OpenFile wrapping those of the underlying system. Not all
+// flags may be implemented on a given system.
 const (
 	O_RDONLY int = syscall.O_RDONLY // open the file read-only.
 	O_WRONLY int = syscall.O_WRONLY // open the file write-only.
@@ -93,9 +93,6 @@ func (f *File) Read(b []byte) (n int, err error) {
 		return 0, ErrInvalid
 	}
 	n, e := f.read(b)
-	if n < 0 {
-		n = 0
-	}
 	if n == 0 && len(b) > 0 && e == nil {
 		return 0, io.EOF
 	}
@@ -176,6 +173,7 @@ func (f *File) WriteAt(b []byte, off int64) (n int, err error) {
 // according to whence: 0 means relative to the origin of the file, 1 means
 // relative to the current offset, and 2 means relative to the end.
 // It returns the new offset and an error, if any.
+// The behavior of Seek on a file opened with O_APPEND is not specified.
 func (f *File) Seek(offset int64, whence int) (ret int64, err error) {
 	if f == nil {
 		return 0, ErrInvalid
@@ -258,7 +256,9 @@ func Create(name string) (*File, error) {
 // lstat is overridden in tests.
 var lstat = Lstat
 
-// Rename renames (moves) a file. OS-specific restrictions might apply.
+// Rename renames (moves) oldpath to newpath.
+// If newpath already exists, Rename replaces it.
+// OS-specific restrictions may apply when oldpath and newpath are in different directories.
 // If there is an error, it will be of type *LinkError.
 func Rename(oldpath, newpath string) error {
 	return rename(oldpath, newpath)