cli_tools/import_precheck/precheck/user_linux.go

//  Copyright 2017 Google Inc. All Rights Reserved.
//
//  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 precheck

import (
	"errors"
	"os"
)

// CheckRoot returns an error if the process's runtime user isn't root.
func CheckRoot() error {
	uid := os.Geteuid()
	if uid != 0 {
		return errors.New("must be run as root")
	}
	return nil
}