bin/pax/tar.h

   1 /*-
   2  * Copyright (c) 1992 Keith Muller.
   3  * Copyright (c) 1992, 1993
   4  *      The Regents of the University of California.  All rights reserved.
   5  *
   6  * This code is derived from software contributed to Berkeley by
   7  * Keith Muller of the University of California, San Diego.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed by the University of
  20  *      California, Berkeley and its contributors.
  21  * 4. Neither the name of the University nor the names of its contributors
  22  *    may be used to endorse or promote products derived from this software
  23  *    without specific prior written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  35  * SUCH DAMAGE.
  36  *
  37  *      @(#)tar.h       8.2 (Berkeley) 4/18/94
  38  * $FreeBSD: src/bin/pax/tar.h,v 1.6 1999/08/27 23:14:47 peter Exp $
  39  * $DragonFly: src/bin/pax/tar.h,v 1.2 2003/06/17 06:22:50 dillon Exp $
  40  */
  41
  42 /*
  43  * defines and data structures common to all tar formats
  44  */
  45 #define CHK_LEN         8               /* length of checksum field */
  46 #define TNMSZ           100             /* size of name field */
  47 #ifdef _PAX_
  48 #define NULLCNT         2               /* number of null blocks in trailer */
  49 #define CHK_OFFSET      148             /* start of checksum field */
  50 #define BLNKSUM         256L            /* sum of checksum field using ' ' */
  51 #endif /* _PAX_ */
  52
  53 /*
  54  * Values used in typeflag field in all tar formats
  55  * (only REGTYPE, LNKTYPE and SYMTYPE are used in old BSD tar headers)
  56  */
  57 #define REGTYPE         '0'             /* Regular File */
  58 #define AREGTYPE        '\0'            /* Regular File */
  59 #define LNKTYPE         '1'             /* Link */
  60 #define SYMTYPE         '2'             /* Symlink */
  61 #define CHRTYPE         '3'             /* Character Special File */
  62 #define BLKTYPE         '4'             /* Block Special File */
  63 #define DIRTYPE         '5'             /* Directory */
  64 #define FIFOTYPE        '6'             /* FIFO */
  65 #define CONTTYPE        '7'             /* high perf file */
  66
  67 /*
  68  * Mode field encoding of the different file types - values in octal
  69  */
  70 #define TSUID           04000           /* Set UID on execution */
  71 #define TSGID           02000           /* Set GID on execution */
  72 #define TSVTX           01000           /* Reserved */
  73 #define TUREAD          00400           /* Read by owner */
  74 #define TUWRITE         00200           /* Write by owner */
  75 #define TUEXEC          00100           /* Execute/Search by owner */
  76 #define TGREAD          00040           /* Read by group */
  77 #define TGWRITE         00020           /* Write by group */
  78 #define TGEXEC          00010           /* Execute/Search by group */
  79 #define TOREAD          00004           /* Read by other */
  80 #define TOWRITE         00002           /* Write by other */
  81 #define TOEXEC          00001           /* Execute/Search by other */
  82
  83 #ifdef _PAX_
  84 /*
  85  * Pad with a bit mask, much faster than doing a mod but only works on powers
  86  * of 2. Macro below is for block of 512 bytes.
  87  */
  88 #define TAR_PAD(x)      ((512 - ((x) & 511)) & 511)
  89 #endif /* _PAX_ */
  90
  91 /*
  92  * structure of an old tar header as it appeared in BSD releases
  93  */
  94 typedef struct {
  95         char name[TNMSZ];               /* name of entry */
  96         char mode[8];                   /* mode */
  97         char uid[8];                    /* uid */
  98         char gid[8];                    /* gid */
  99         char size[12];                  /* size */
 100         char mtime[12];                 /* modification time */
 101         char chksum[CHK_LEN];           /* checksum */
 102         char linkflag;                  /* norm, hard, or sym. */
 103         char linkname[TNMSZ];           /* linked to name */
 104 } HD_TAR;
 105
 106 #ifdef _PAX_
 107 /*
 108  * -o options for BSD tar to not write directories to the archive
 109  */
 110 #define TAR_NODIR       "nodir"
 111 #define TAR_OPTION      "write_opt"
 112
 113 /*
 114  * default device names
 115  */
 116 #define DEV_0           "/dev/rmt0"
 117 #define DEV_1           "/dev/rmt1"
 118 #define DEV_4           "/dev/rmt4"
 119 #define DEV_5           "/dev/rmt5"
 120 #define DEV_7           "/dev/rmt7"
 121 #define DEV_8           "/dev/rmt8"
 122 #endif /* _PAX_ */
 123
 124 /*
 125  * Data Interchange Format - Extended tar header format - POSIX 1003.1-1990
 126  */
 127 #define TPFSZ           155
 128 #define TMAGIC          "ustar"         /* ustar and a null */
 129 #define TMAGLEN         6
 130 #define TVERSION        "00"            /* 00 and no null */
 131 #define TVERSLEN        2
 132
 133 typedef struct {
 134         char name[TNMSZ];               /* name of entry */
 135         char mode[8];                   /* mode */
 136         char uid[8];                    /* uid */
 137         char gid[8];                    /* gid */
 138         char size[12];                  /* size */
 139         char mtime[12];                 /* modification time */
 140         char chksum[CHK_LEN];           /* checksum */
 141         char typeflag;                  /* type of file. */
 142         char linkname[TNMSZ];           /* linked to name */
 143         char magic[TMAGLEN];            /* magic cookie */
 144         char version[TVERSLEN];         /* version */
 145         char uname[32];                 /* ascii owner name */
 146         char gname[32];                 /* ascii group name */
 147         char devmajor[8];               /* major device number */
 148         char devminor[8];               /* minor device number */
 149         char prefix[TPFSZ];             /* linked to name */
 150 } HD_USTAR;