| // +build !windows |
| |
| /* |
| Copyright 2018 The Kubernetes 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 util |
| |
| import ( |
| "github.com/pkg/errors" |
| "os" |
| "path/filepath" |
| "syscall" |
| ) |
| |
| // Chroot chroot()s to the new path. |
| // NB: All file paths after this call are effectively relative to |
| // `rootfs` |
| func Chroot(rootfs string) error { |
| if err := syscall.Chroot(rootfs); err != nil { |
| return errors.Wrapf(err, "unable to chroot to %s", rootfs) |
| } |
| root := filepath.FromSlash("/") |
| if err := os.Chdir(root); err != nil { |
| return errors.Wrapf(err, "unable to chdir to %s", root) |
| } |
| return nil |
| } |
