pax/tar.h

   1 /*      $OpenBSD: tar.h,v 1.7 2003/06/02 23:32:09 millert Exp $ */
   2 /*      $NetBSD: tar.h,v 1.3 1995/03/21 09:07:51 cgd Exp $      */
   3
   4 /*-
   5  * Copyright (c) 1992 Keith Muller.
   6  * Copyright (c) 1992, 1993
   7  *      The Regents of the University of California.  All rights reserved.
   8  *
   9  * This code is derived from software contributed to Berkeley by
  10  * Keith Muller of the University of California, San Diego.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions and the following disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in the
  19  *    documentation and/or other materials provided with the distribution.
  20  * 3. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  *      @(#)tar.h       8.2 (Berkeley) 4/18/94
  37  */
  38
  39 /*
  40  * defines and data structures common to all tar formats
  41  */
  42 #define CHK_LEN         8               /* length of checksum field */
  43 #define TNMSZ           100             /* size of name field */
  44 #ifdef _PAX_
  45 #define NULLCNT         2               /* number of null blocks in trailer */
  46 #define CHK_OFFSET      148             /* start of chksum field */
  47 #define BLNKSUM         256L            /* sum of checksum field using ' ' */
  48 #endif /* _PAX_ */
  49
  50 /*
  51  * Values used in typeflag field in all tar formats
  52  * (only REGTYPE, LNKTYPE and SYMTYPE are used in old bsd tar headers)
  53  */
  54 #define REGTYPE         '0'             /* Regular File */
  55 #define AREGTYPE        '\0'            /* Regular File */
  56 #define LNKTYPE         '1'             /* Link */
  57 #define SYMTYPE         '2'             /* Symlink */
  58 #define CHRTYPE         '3'             /* Character Special File */
  59 #define BLKTYPE         '4'             /* Block Special File */
  60 #define DIRTYPE         '5'             /* Directory */
  61 #define FIFOTYPE        '6'             /* FIFO */
  62 #define CONTTYPE        '7'             /* high perf file */
  63
  64 #define PAXXTYPE        'x'             /* pax format extended header */
  65 #define PAXGTYPE        'g'             /* pax format global extended header */
  66
  67 /*
  68  * GNU tar compatibility;
  69  */
  70 #define LONGLINKTYPE    'K'             /* Long Symlink */
  71 #define LONGNAMETYPE    'L'             /* Long File */
  72
  73 /*
  74  * Mode field encoding of the different file types - values in octal
  75  */
  76 #define TSUID           04000           /* Set UID on execution */
  77 #define TSGID           02000           /* Set GID on execution */
  78 #define TSVTX           01000           /* Reserved */
  79 #define TUREAD          00400           /* Read by owner */
  80 #define TUWRITE         00200           /* Write by owner */
  81 #define TUEXEC          00100           /* Execute/Search by owner */
  82 #define TGREAD          00040           /* Read by group */
  83 #define TGWRITE         00020           /* Write by group */
  84 #define TGEXEC          00010           /* Execute/Search by group */
  85 #define TOREAD          00004           /* Read by other */
  86 #define TOWRITE         00002           /* Write by other */
  87 #define TOEXEC          00001           /* Execute/Search by other */
  88
  89 #ifdef _PAX_
  90 /*
  91  * Pad with a bit mask, much faster than doing a mod but only works on powers
  92  * of 2. Macro below is for block of 512 bytes.
  93  */
  94 #define TAR_PAD(x)      ((512 - ((x) & 511)) & 511)
  95 #endif /* _PAX_ */
  96
  97 /*
  98  * structure of an old tar header as it appeared in BSD releases
  99  */
 100 typedef struct {
 101         char name[TNMSZ];               /* name of entry */
 102         char mode[8];                   /* mode */
 103         char uid[8];                    /* uid */
 104         char gid[8];                    /* gid */
 105         char size[12];                  /* size */
 106         char mtime[12];                 /* modification time */
 107         char chksum[CHK_LEN];           /* checksum */
 108         char linkflag;                  /* norm, hard, or sym. */
 109         char linkname[TNMSZ];           /* linked to name */
 110 } HD_TAR;
 111
 112 #ifdef _PAX_
 113 /*
 114  * -o options for BSD tar to not write directories to the archive
 115  */
 116 #define TAR_NODIR       "nodir"
 117 #define TAR_OPTION      "write_opt"
 118
 119 /*
 120  * default device names
 121  */
 122 #define DEV_0           "/dev/rst0"
 123 #define DEV_1           "/dev/rst1"
 124 #define DEV_4           "/dev/rst4"
 125 #define DEV_5           "/dev/rst5"
 126 #define DEV_7           "/dev/rst7"
 127 #define DEV_8           "/dev/rst8"
 128 #endif /* _PAX_ */
 129
 130 /*
 131  * Data Interchange Format - Extended tar header format - POSIX 1003.1-1990
 132  */
 133 #define TPFSZ           155
 134 #define TMAGIC          "ustar"         /* ustar and a null */
 135 #define TMAGLEN         6
 136 #define TVERSION        "00"            /* 00 and no null */
 137 #define TVERSLEN        2
 138
 139 typedef struct {
 140         char name[TNMSZ];               /* name of entry */
 141         char mode[8];                   /* mode */
 142         char uid[8];                    /* uid */
 143         char gid[8];                    /* gid */
 144         char size[12];                  /* size */
 145         char mtime[12];                 /* modification time */
 146         char chksum[CHK_LEN];           /* checksum */
 147         char typeflag;                  /* type of file. */
 148         char linkname[TNMSZ];           /* linked to name */
 149         char magic[TMAGLEN];            /* magic cookie */
 150         char version[TVERSLEN];         /* version */
 151         char uname[32];                 /* ascii owner name */
 152         char gname[32];                 /* ascii group name */
 153         char devmajor[8];               /* major device number */
 154         char devminor[8];               /* minor device number */
 155         char prefix[TPFSZ];             /* linked to name */
 156 } HD_USTAR;