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// Copyright 2012 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.
package os
import "syscall"
func isExist(err error) bool {
switch pe := err.(type) {
case nil:
return false
case *PathError:
err = pe.Err
case *LinkError:
err = pe.Err
case *SyscallError:
err = pe.Err
}
return err == syscall.ERROR_ALREADY_EXISTS ||
err == syscall.ERROR_FILE_EXISTS || err == ErrExist
}
const _ERROR_BAD_NETPATH = syscall.Errno(53)
func isNotExist(err error) bool {
switch pe := err.(type) {
case nil:
return false
case *PathError:
err = pe.Err
case *LinkError:
err = pe.Err
case *SyscallError:
err = pe.Err
}
return err == syscall.ERROR_FILE_NOT_FOUND ||
err == _ERROR_BAD_NETPATH ||
err == syscall.ERROR_PATH_NOT_FOUND || err == ErrNotExist
}
func isPermission(err error) bool {
switch pe := err.(type) {
case nil:
return false
case *PathError:
err = pe.Err
case *LinkError:
err = pe.Err
case *SyscallError:
err = pe.Err
}
return err == syscall.ERROR_ACCESS_DENIED || err == ErrPermission
}
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