github.com/opencontainers/umoci@v0.4.8-0.20240508124516-656e4836fb0d/pkg/system/tarmode_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 system 19 20 import ( 21 "archive/tar" 22 23 "golang.org/x/sys/unix" 24 ) 25 26 // Tarmode takes a Typeflag (from a tar.Header for example) and returns the 27 // corresponding os.Filemode bit. Unknown typeflags are treated like regular 28 // files. 29 func Tarmode(typeflag byte) uint32 { 30 switch typeflag { 31 case tar.TypeSymlink: 32 return unix.S_IFLNK 33 case tar.TypeChar: 34 return unix.S_IFCHR 35 case tar.TypeBlock: 36 return unix.S_IFBLK 37 case tar.TypeFifo: 38 return unix.S_IFIFO 39 case tar.TypeDir: 40 return unix.S_IFDIR 41 } 42 return 0 43 }