code review 1103041: os: add Utime function

src/pkg/os/file.go

 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
 // The os package provides a platform-independent interface to operating
 // system functionality.  The design is Unix-like.
 package os
 
 import (
         "runtime"
@@ skipping 390 matching lines @@
 
 // Truncate changes the size of the file.
 // It does not change the I/O offset.
 func (f *File) Truncate(size int64) Error {
         if e := syscall.Ftruncate(f.fd, size); e != 0 {
                 return &PathError{"truncate", f.name, Errno(e)}
         }
         return nil
 }
 
-// Utime changes the access and modification times of the named file.
-func Utime(name string, atime_ns int64, mtime_ns int64) Error {
+// Chtimes changes the access and modification times of the named
+// file, similar to the Unix utime() or utimes() functions.
+//
+// The argument times are in nanoseconds, although the underlying
+// filesystem may truncate or round the values to a more
+// coarse time unit.
+func Chtimes(name string, atime_ns int64, mtime_ns int64) Error {
         var utimes [2]syscall.Timeval
         utimes[0] = syscall.NsecToTimeval(atime_ns)
         utimes[1] = syscall.NsecToTimeval(mtime_ns)
         if e := syscall.Utimes(name, &utimes); e != 0 {
-                return &PathError{"utime", name, Errno(e)}
-        }
-        return nil
-}
+                return &PathError{"chtimes", name, Errno(e)}
+        }
+        return nil
+}