commands/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  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  *      @(#)tar.h       8.2 (Berkeley) 4/18/94
  34  * $FreeBSD: src/bin/pax/tar.h,v 1.7 2004/04/06 20:06:49 markm Exp $
  35  */
  36
  37 /*
  38  * defines and data structures common to all tar formats
  39  */
  40 #define CHK_LEN         8               /* length of checksum field */
  41 #define TNMSZ           100             /* size of name field */
  42 #ifdef _PAX_
  43 #define NULLCNT         2               /* number of null blocks in trailer */
  44 #define CHK_OFFSET      148             /* start of checksum field */
  45 #define BLNKSUM         256L            /* sum of checksum field using ' ' */
  46 #endif /* _PAX_ */
  47
  48 /*
  49  * Values used in typeflag field in all tar formats
  50  * (only REGTYPE, LNKTYPE and SYMTYPE are used in old BSD tar headers)
  51  */
  52 #define REGTYPE         '0'             /* Regular File */
  53 #define AREGTYPE        '\0'            /* Regular File */
  54 #define LNKTYPE         '1'             /* Link */
  55 #define SYMTYPE         '2'             /* Symlink */
  56 #define CHRTYPE         '3'             /* Character Special File */
  57 #define BLKTYPE         '4'             /* Block Special File */
  58 #define DIRTYPE         '5'             /* Directory */
  59 #define FIFOTYPE        '6'             /* FIFO */
  60 #define CONTTYPE        '7'             /* high perf file */
  61
  62 /*
  63  * Mode field encoding of the different file types - values in octal
  64  */
  65 #define TSUID           04000           /* Set UID on execution */
  66 #define TSGID           02000           /* Set GID on execution */
  67 #define TSVTX           01000           /* Reserved */
  68 #define TUREAD          00400           /* Read by owner */
  69 #define TUWRITE         00200           /* Write by owner */
  70 #define TUEXEC          00100           /* Execute/Search by owner */
  71 #define TGREAD          00040           /* Read by group */
  72 #define TGWRITE         00020           /* Write by group */
  73 #define TGEXEC          00010           /* Execute/Search by group */
  74 #define TOREAD          00004           /* Read by other */
  75 #define TOWRITE         00002           /* Write by other */
  76 #define TOEXEC          00001           /* Execute/Search by other */
  77
  78 #ifdef _PAX_
  79 /*
  80  * Pad with a bit mask, much faster than doing a mod but only works on powers
  81  * of 2. Macro below is for block of 512 bytes.
  82  */
  83 #define TAR_PAD(x)      ((512 - ((x) & 511)) & 511)
  84 #endif /* _PAX_ */
  85
  86 /*
  87  * structure of an old tar header as it appeared in BSD releases
  88  */
  89 typedef struct {
  90         char name[TNMSZ];               /* name of entry */
  91         char mode[8];                   /* mode */
  92         char uid[8];                    /* uid */
  93         char gid[8];                    /* gid */
  94         char size[12];                  /* size */
  95         char mtime[12];                 /* modification time */
  96         char chksum[CHK_LEN];           /* checksum */
  97         char linkflag;                  /* norm, hard, or sym. */
  98         char linkname[TNMSZ];           /* linked to name */
  99 } HD_TAR;
 100
 101 #ifdef _PAX_
 102 /*
 103  * -o options for BSD tar to not write directories to the archive
 104  */
 105 #define TAR_NODIR       "nodir"
 106 #define TAR_OPTION      "write_opt"
 107
 108 /*
 109  * default device names
 110  */
 111 #define DEV_0           "/dev/rmt0"
 112 #define DEV_1           "/dev/rmt1"
 113 #define DEV_4           "/dev/rmt4"
 114 #define DEV_5           "/dev/rmt5"
 115 #define DEV_7           "/dev/rmt7"
 116 #define DEV_8           "/dev/rmt8"
 117 #endif /* _PAX_ */
 118
 119 /*
 120  * Data Interchange Format - Extended tar header format - POSIX 1003.1-1990
 121  */
 122 #define TPFSZ           155
 123 #define TMAGIC          "ustar"         /* ustar and a null */
 124 #define TMAGLEN         6
 125 #define TVERSION        "00"            /* 00 and no null */
 126 #define TVERSLEN        2
 127
 128 typedef struct {
 129         char name[TNMSZ];               /* name of entry */
 130         char mode[8];                   /* mode */
 131         char uid[8];                    /* uid */
 132         char gid[8];                    /* gid */
 133         char size[12];                  /* size */
 134         char mtime[12];                 /* modification time */
 135         char chksum[CHK_LEN];           /* checksum */
 136         char typeflag;                  /* type of file. */
 137         char linkname[TNMSZ];           /* linked to name */
 138         char magic[TMAGLEN];            /* magic cookie */
 139         char version[TVERSLEN];         /* version */
 140         char uname[32];                 /* ascii owner name */
 141         char gname[32];                 /* ascii group name */
 142         char devmajor[8];               /* major device number */
 143         char devminor[8];               /* minor device number */
 144         char prefix[TPFSZ];             /* linked to name */
 145 } HD_USTAR;