code review 13183044: os: dragonfly support

src/pkg/os/exec_unix.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.
 
-// +build darwin freebsd linux netbsd openbsd
+// +build darwin dragonfly freebsd linux netbsd openbsd
 
 package os
 
 import (
         "errors"
         "runtime"
         "syscall"
         "time"
 )
 
@@ skipping 45 matching lines @@
         return newProcess(pid, 0), nil
 }
 
 func (p *ProcessState) userTime() time.Duration {
         return time.Duration(p.rusage.Utime.Nano()) * time.Nanosecond
 }
 
 func (p *ProcessState) systemTime() time.Duration {
         return time.Duration(p.rusage.Stime.Nano()) * time.Nanosecond
 }