cipd/client/cipd/fs/errs.go

// Copyright 2019 The LUCI Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package fs

import (
	"os"
	"syscall"
)

// See either fs_posix.go or fs_windows.go for implementation of errno*(...)
// functions.

// IsNotEmpty is true if err represents ENOTEMPTY or equivalent.
func IsNotEmpty(err error) bool {
	return errnoNotEmpty(innerOSErr(err))
}

// IsNotDir if true if err represents ENOTDIR or equivalent.
func IsNotDir(err error) bool {
	return errnoNotDir(innerOSErr(err))
}

// IsAccessDenied is true if err represents Windows' ERROR_ACCESS_DENIED.
//
// Always false on Posix.
func IsAccessDenied(err error) bool {
	return errnoAccessDenied(innerOSErr(err))
}

func innerOSErr(err error) error {
	switch e := err.(type) {
	case syscall.Errno:
		return e
	case *os.PathError:
		return e.Err
	case *os.LinkError:
		return e.Err
	}
	return nil
}