pax/tar.h

   1 /*      $OpenBSD: tar.h,v 1.5 1997/04/16 03:50:25 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. All advertising materials mentioning features or use of this software
  21  *    must display the following acknowledgement:
  22  *      This product includes software developed by the University of
  23  *      California, Berkeley and its contributors.
  24  * 4. Neither the name of the University nor the names of its contributors
  25  *    may be used to endorse or promote products derived from this software
  26  *    without specific prior written permission.
  27  *
  28  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  38  * SUCH DAMAGE.
  39  *
  40  *      @(#)tar.h       8.2 (Berkeley) 4/18/94
  41  */
  42
  43 /*
  44  * defines and data structures common to all tar formats
  45  */
  46 #define CHK_LEN         8               /* length of checksum field */
  47 #define TNMSZ           100             /* size of name field */
  48 #ifdef _PAX_
  49 #define NULLCNT         2               /* number of null blocks in trailer */
  50 #define CHK_OFFSET      148             /* start of chksum field */
  51 #define BLNKSUM         256L            /* sum of checksum field using ' ' */
  52 #endif /* _PAX_ */
  53
  54 /*
  55  * Values used in typeflag field in all tar formats
  56  * (only REGTYPE, LNKTYPE and SYMTYPE are used in old bsd tar headers)
  57  */
  58 #define REGTYPE         '0'             /* Regular File */
  59 #define AREGTYPE        '\0'            /* Regular File */
  60 #define LNKTYPE         '1'             /* Link */
  61 #define SYMTYPE         '2'             /* Symlink */
  62 #define CHRTYPE         '3'             /* Character Special File */
  63 #define BLKTYPE         '4'             /* Block Special File */
  64 #define DIRTYPE         '5'             /* Directory */
  65 #define FIFOTYPE        '6'             /* FIFO */
  66 #define CONTTYPE        '7'             /* high perf file */
  67
  68 /*
  69  * Mode field encoding of the different file types - values in octal
  70  */
  71 #define TSUID           04000           /* Set UID on execution */
  72 #define TSGID           02000           /* Set GID on execution */
  73 #define TSVTX           01000           /* Reserved */
  74 #define TUREAD          00400           /* Read by owner */
  75 #define TUWRITE         00200           /* Write by owner */
  76 #define TUEXEC          00100           /* Execute/Search by owner */
  77 #define TGREAD          00040           /* Read by group */
  78 #define TGWRITE         00020           /* Write by group */
  79 #define TGEXEC          00010           /* Execute/Search by group */
  80 #define TOREAD          00004           /* Read by other */
  81 #define TOWRITE         00002           /* Write by other */
  82 #define TOEXEC          00001           /* Execute/Search by other */
  83
  84 #ifdef _PAX_
  85 /*
  86  * Pad with a bit mask, much faster than doing a mod but only works on powers
  87  * of 2. Macro below is for block of 512 bytes.
  88  */
  89 #define TAR_PAD(x)      ((512 - ((x) & 511)) & 511)
  90 #endif /* _PAX_ */
  91
  92 /*
  93  * structure of an old tar header as it appeared in BSD releases
  94  */
  95 typedef struct {
  96         char name[TNMSZ];               /* name of entry */
  97         char mode[8];                   /* mode */
  98         char uid[8];                    /* uid */
  99         char gid[8];                    /* gid */
 100         char size[12];                  /* size */
 101         char mtime[12];                 /* modification time */
 102         char chksum[CHK_LEN];           /* checksum */
 103         char linkflag;                  /* norm, hard, or sym. */
 104         char linkname[TNMSZ];           /* linked to name */
 105 } HD_TAR;
 106
 107 #ifdef _PAX_
 108 /*
 109  * -o options for BSD tar to not write directories to the archive
 110  */
 111 #define TAR_NODIR       "nodir"
 112 #define TAR_OPTION      "write_opt"
 113
 114 /*
 115  * default device names
 116  */
 117 #define DEV_0           "/dev/rst0"
 118 #define DEV_1           "/dev/rst1"
 119 #define DEV_4           "/dev/rst4"
 120 #define DEV_5           "/dev/rst5"
 121 #define DEV_7           "/dev/rst7"
 122 #define DEV_8           "/dev/rst8"
 123 #endif /* _PAX_ */
 124
 125 /*
 126  * Data Interchange Format - Extended tar header format - POSIX 1003.1-1990
 127  */
 128 #define TPFSZ           155
 129 #define TMAGIC          "ustar"         /* ustar and a null */
 130 #define TMAGLEN         6
 131 #define TVERSION        "00"            /* 00 and no null */
 132 #define TVERSLEN        2
 133
 134 typedef struct {
 135         char name[TNMSZ];               /* name of entry */
 136         char mode[8];                   /* mode */
 137         char uid[8];                    /* uid */
 138         char gid[8];                    /* gid */
 139         char size[12];                  /* size */
 140         char mtime[12];                 /* modification time */
 141         char chksum[CHK_LEN];           /* checksum */
 142         char typeflag;                  /* type of file. */
 143         char linkname[TNMSZ];           /* linked to name */
 144         char magic[TMAGLEN];            /* magic cookie */
 145         char version[TVERSLEN];         /* version */
 146         char uname[32];                 /* ascii owner name */
 147         char gname[32];                 /* ascii group name */
 148         char devmajor[8];               /* major device number */
 149         char devminor[8];               /* minor device number */
 150         char prefix[TPFSZ];             /* linked to name */
 151 } HD_USTAR;