1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1992 Keith Muller. 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Keith Muller of the University of California, San Diego. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 /* 37 * defines and data structures common to all tar formats 38 */ 39 #define CHK_LEN 8 /* length of checksum field */ 40 #define TNMSZ 100 /* size of name field */ 41 #ifdef _PAX_ 42 #define NULLCNT 2 /* number of null blocks in trailer */ 43 #define CHK_OFFSET 148 /* start of checksum field */ 44 #define BLNKSUM 256L /* sum of checksum field using ' ' */ 45 #endif /* _PAX_ */ 46 47 /* 48 * Values used in typeflag field in all tar formats 49 * (only REGTYPE, LNKTYPE and SYMTYPE are used in old BSD tar headers) 50 */ 51 #define REGTYPE '0' /* Regular File */ 52 #define AREGTYPE '\0' /* Regular File */ 53 #define LNKTYPE '1' /* Link */ 54 #define SYMTYPE '2' /* Symlink */ 55 #define CHRTYPE '3' /* Character Special File */ 56 #define BLKTYPE '4' /* Block Special File */ 57 #define DIRTYPE '5' /* Directory */ 58 #define FIFOTYPE '6' /* FIFO */ 59 #define CONTTYPE '7' /* high perf file */ 60 61 /* 62 * Mode field encoding of the different file types - values in octal 63 */ 64 #define TSUID 04000 /* Set UID on execution */ 65 #define TSGID 02000 /* Set GID on execution */ 66 #define TSVTX 01000 /* Reserved */ 67 #define TUREAD 00400 /* Read by owner */ 68 #define TUWRITE 00200 /* Write by owner */ 69 #define TUEXEC 00100 /* Execute/Search by owner */ 70 #define TGREAD 00040 /* Read by group */ 71 #define TGWRITE 00020 /* Write by group */ 72 #define TGEXEC 00010 /* Execute/Search by group */ 73 #define TOREAD 00004 /* Read by other */ 74 #define TOWRITE 00002 /* Write by other */ 75 #define TOEXEC 00001 /* Execute/Search by other */ 76 77 #ifdef _PAX_ 78 /* 79 * Pad with a bit mask, much faster than doing a mod but only works on powers 80 * of 2. Macro below is for block of 512 bytes. 81 */ 82 #define TAR_PAD(x) ((512 - ((x) & 511)) & 511) 83 #endif /* _PAX_ */ 84 85 /* 86 * structure of an old tar header as it appeared in BSD releases 87 */ 88 typedef struct { 89 char name[TNMSZ]; /* name of entry */ 90 char mode[8]; /* mode */ 91 char uid[8]; /* uid */ 92 char gid[8]; /* gid */ 93 char size[12]; /* size */ 94 char mtime[12]; /* modification time */ 95 char chksum[CHK_LEN]; /* checksum */ 96 char linkflag; /* norm, hard, or sym. */ 97 char linkname[TNMSZ]; /* linked to name */ 98 } HD_TAR __aligned(1); 99 100 #ifdef _PAX_ 101 /* 102 * -o options for BSD tar to not write directories to the archive 103 */ 104 #define TAR_NODIR "nodir" 105 #define TAR_OPTION "write_opt" 106 107 /* 108 * default device names 109 */ 110 #define DEV_0 "/dev/rmt0" 111 #define DEV_1 "/dev/rmt1" 112 #define DEV_4 "/dev/rmt4" 113 #define DEV_5 "/dev/rmt5" 114 #define DEV_7 "/dev/rmt7" 115 #define DEV_8 "/dev/rmt8" 116 #endif /* _PAX_ */ 117 118 /* 119 * Data Interchange Format - Extended tar header format - POSIX 1003.1-1990 120 */ 121 #define TPFSZ 155 122 #define TMAGIC "ustar" /* ustar and a null */ 123 #define TMAGLEN 6 124 #define TVERSION "00" /* 00 and no null */ 125 #define TVERSLEN 2 126 127 typedef struct { 128 char name[TNMSZ]; /* name of entry */ 129 char mode[8]; /* mode */ 130 char uid[8]; /* uid */ 131 char gid[8]; /* gid */ 132 char size[12]; /* size */ 133 char mtime[12]; /* modification time */ 134 char chksum[CHK_LEN]; /* checksum */ 135 char typeflag; /* type of file. */ 136 char linkname[TNMSZ]; /* linked to name */ 137 char magic[TMAGLEN]; /* magic cookie */ 138 char version[TVERSLEN]; /* version */ 139 char uname[32]; /* ascii owner name */ 140 char gname[32]; /* ascii group name */ 141 char devmajor[8]; /* major device number */ 142 char devminor[8]; /* minor device number */ 143 char prefix[TPFSZ]; /* linked to name */ 144 } HD_USTAR __aligned(1); 145