You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: root_unix.go
    path of file: ./repos/helm/cmd/helm
    
    the code of the file until where you have to start completion: //go:build !windows

/*
Copyright The Helm 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
    
func checkPerms() {
	// This function MUST NOT FAIL, as it is just a check for a common permissions problem.
	// If for some reason the function hits a stopping condition, it may panic. But only if
	// we can be sure that it is panicking because Helm cannot proceed.

	kc := settings.KubeConfig
	if kc == "" {
		kc = os.Getenv("KUBECONFIG")
	}
	if kc == "" {
		u, err := user.Current()
		if err != nil {
			// No idea where to find KubeConfig, so return silently. Many helm commands
			// can proceed happily without a KUBECONFIG, so this is not a fatal error.
			return
		}
		kc = filepath.Join(u.HomeDir, ".kube", "config")
	}
	fi, err := os.Stat(kc)
	if err != nil {
		// DO NOT error if no KubeConfig is found. Not all commands require one.
		return
	}

	perm := fi.Mode().Perm()
	if perm&0040 > 0 {
		warning("Kubernetes configuration file is group-readable. This is insecure. Location: %s", kc)
	}
	if perm&0004 > 0 {
		warning("Kubernetes configuration file is world-readable. This is insecure. Location: %s", kc)
	}
}