1 // Copyright 2012 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 package os 6 7 import "syscall" 8 9 func isExist(err error) bool { 10 switch pe := err.(type) { 11 case nil: 12 return false 13 case *PathError: 14 err = pe.Err 15 case *LinkError: 16 err = pe.Err 17 } 18 return err == syscall.ERROR_ALREADY_EXISTS || 19 err == syscall.ERROR_FILE_EXISTS || err == ErrExist 20 } 21 22 func isNotExist(err error) bool { 23 switch pe := err.(type) { 24 case nil: 25 return false 26 case *PathError: 27 err = pe.Err 28 case *LinkError: 29 err = pe.Err 30 } 31 return err == syscall.ERROR_FILE_NOT_FOUND || 32 err == syscall.ERROR_PATH_NOT_FOUND || err == ErrNotExist 33 } 34 35 func isPermission(err error) bool { 36 switch pe := err.(type) { 37 case nil: 38 return false 39 case *PathError: 40 err = pe.Err 41 case *LinkError: 42 err = pe.Err 43 } 44 return err == syscall.ERROR_ACCESS_DENIED || err == ErrPermission 45 } 46
