github.com/opencontainers/umoci@v0.4.8-0.20240508124516-656e4836fb0d/oci/layer/tar_unix.go (about) 1 /* 2 * umoci: Umoci Modifies Open Containers' Images 3 * Copyright (C) 2016-2020 SUSE LLC 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18 package layer 19 20 import ( 21 "archive/tar" 22 23 "golang.org/x/sys/unix" 24 ) 25 26 func updateHeader(hdr *tar.Header, s unix.Stat_t) { 27 // Currently the Go stdlib doesn't fill in the major/minor numbers of 28 // devices, so we have to do it manually. 29 if s.Mode&unix.S_IFBLK == unix.S_IFBLK || s.Mode&unix.S_IFCHR == unix.S_IFCHR { 30 hdr.Devmajor = int64(unix.Major(uint64(s.Rdev))) 31 hdr.Devminor = int64(unix.Minor(uint64(s.Rdev))) 32 } 33 }