bin/pax/tar.h

   1 /*      $NetBSD: tar.h,v 1.10 2013/01/24 17:43:44 christos Exp $        */
   2
   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  *      @(#)tar.h       8.2 (Berkeley) 4/18/94
  36  */
  37
  38 /*
  39  * defines and data structures common to all tar formats
  40  */
  41 #define CHK_LEN         8               /* length of checksum field */
  42 #define TNMSZ           100             /* size of name field */
  43 #ifdef _PAX_
  44 #define NULLCNT         2               /* number of null blocks in trailer */
  45 #define CHK_OFFSET      148             /* start of chksum field */
  46 #define BLNKSUM         256L            /* sum of checksum field using ' ' */
  47 #endif /* _PAX_ */
  48
  49 /*
  50  * Values used in typeflag field in all tar formats
  51  * (only REGTYPE, LNKTYPE and SYMTYPE are used in old bsd tar headers)
  52  */
  53 #define REGTYPE         '0'             /* Regular File */
  54 #define AREGTYPE        '\0'            /* Regular File */
  55 #define LNKTYPE         '1'             /* Link */
  56 #define SYMTYPE         '2'             /* Symlink */
  57 #define CHRTYPE         '3'             /* Character Special File */
  58 #define BLKTYPE         '4'             /* Block Special File */
  59 #define DIRTYPE         '5'             /* Directory */
  60 #define FIFOTYPE        '6'             /* FIFO */
  61 #define CONTTYPE        '7'             /* high perf file */
  62 #define GLOBXTYPE       'g'             /* global extended header */
  63 #define FILEXTYPE       'x'             /* file extended header */
  64
  65 /*
  66  * GNU tar compatibility;
  67  */
  68 #define LONGLINKTYPE    'K'             /* Long Symlink */
  69 #define LONGNAMETYPE    'L'             /* Long File */
  70
  71 /*
  72  * Mode field encoding of the different file types - values in octal
  73  */
  74 #define TSUID           04000           /* Set UID on execution */
  75 #define TSGID           02000           /* Set GID on execution */
  76 #define TSVTX           01000           /* Reserved */
  77 #define TUREAD          00400           /* Read by owner */
  78 #define TUWRITE         00200           /* Write by owner */
  79 #define TUEXEC          00100           /* Execute/Search by owner */
  80 #define TGREAD          00040           /* Read by group */
  81 #define TGWRITE         00020           /* Write by group */
  82 #define TGEXEC          00010           /* Execute/Search by group */
  83 #define TOREAD          00004           /* Read by other */
  84 #define TOWRITE         00002           /* Write by other */
  85 #define TOEXEC          00001           /* Execute/Search by other */
  86
  87 #ifdef _PAX_
  88 /*
  89  * Pad with a bit mask, much faster than doing a mod but only works on powers
  90  * of 2. Macro below is for block of 512 bytes.
  91  */
  92 #define TAR_PAD(x)      ((512 - ((x) & 511)) & 511)
  93 #endif /* _PAX_ */
  94
  95 /*
  96  * structure of an old tar header as it appeared in BSD releases
  97  */
  98 typedef struct {
  99         char name[TNMSZ];               /* name of entry */
 100         char mode[8];                   /* mode */
 101         char uid[8];                    /* uid */
 102         char gid[8];                    /* gid */
 103         char size[12];                  /* size */
 104         char mtime[12];                 /* modification time */
 105         char chksum[CHK_LEN];           /* checksum */
 106         char linkflag;                  /* norm, hard, or sym. */
 107         char linkname[TNMSZ];           /* linked to name */
 108 } HD_TAR;
 109
 110 #ifdef _PAX_
 111 /*
 112  * -o options for BSD tar to not write directories to the archive
 113  */
 114 #define TAR_NODIR       "nodir"
 115 #define TAR_OPTION      "write_opt"
 116
 117 /*
 118  * default device names
 119  */
 120 extern char DEV_0[];
 121 extern char DEV_1[];
 122 extern char DEV_4[];
 123 extern char DEV_5[];
 124 extern char DEV_7[];
 125 extern char DEV_8[];
 126 #endif /* _PAX_ */
 127
 128 /*
 129  * Data Interchange Format - Extended tar header format - POSIX 1003.1-1990
 130  */
 131 #define TPFSZ           155
 132 #define TMAGIC          "ustar"         /* ustar and a null */
 133 #define TMAGLEN         6
 134 #define TVERSION        "00"            /* 00 and no null */
 135 #define TVERSLEN        2
 136
 137 typedef struct {
 138         char name[TNMSZ];               /* name of entry */
 139         char mode[8];                   /* mode */
 140         char uid[8];                    /* uid */
 141         char gid[8];                    /* gid */
 142         char size[12];                  /* size */
 143         char mtime[12];                 /* modification time */
 144         char chksum[CHK_LEN];           /* checksum */
 145         char typeflag;                  /* type of file. */
 146         char linkname[TNMSZ];           /* linked to name */
 147         char magic[TMAGLEN];            /* magic cookie */
 148         char version[TVERSLEN];         /* version */
 149         char uname[32];                 /* ascii owner name */
 150         char gname[32];                 /* ascii group name */
 151         char devmajor[8];               /* major device number */
 152         char devminor[8];               /* minor device number */
 153         char prefix[TPFSZ];             /* linked to name */
 154 } HD_USTAR;