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tar.h

/*    $OpenBSD: tar.h,v 1.7 2003/06/02 23:32:09 millert Exp $     */
/*    $NetBSD: tar.h,v 1.3 1995/03/21 09:07:51 cgd Exp $    */

/*-
 * Copyright (c) 1992 Keith Muller.
 * Copyright (c) 1992, 1993
 *    The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Keith Muller of the University of California, San Diego.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *    @(#)tar.h   8.2 (Berkeley) 4/18/94
 */

/*
 * defines and data structures common to all tar formats
 */
#define CHK_LEN         8           /* length of checksum field */
#define TNMSZ           100         /* size of name field */
#ifdef _PAX_
#define NULLCNT         2           /* number of null blocks in trailer */
#define CHK_OFFSET      148         /* start of chksum field */
#define BLNKSUM         256L        /* sum of checksum field using ' ' */
#endif /* _PAX_ */

/*
 * Values used in typeflag field in all tar formats
 * (only REGTYPE, LNKTYPE and SYMTYPE are used in old bsd tar headers)
 */
#define     REGTYPE           '0'         /* Regular File */
#define     AREGTYPE    '\0'        /* Regular File */
#define     LNKTYPE           '1'         /* Link */
#define     SYMTYPE           '2'         /* Symlink */
#define     CHRTYPE           '3'         /* Character Special File */
#define     BLKTYPE           '4'         /* Block Special File */
#define     DIRTYPE           '5'         /* Directory */
#define     FIFOTYPE    '6'         /* FIFO */
#define     CONTTYPE    '7'         /* high perf file */

/*
 * GNU tar compatibility;
 */
#define     LONGLINKTYPE      'K'         /* Long Symlink */
#define     LONGNAMETYPE      'L'         /* Long File */

/*
 * Mode field encoding of the different file types - values in octal
 */
#define TSUID           04000       /* Set UID on execution */
#define TSGID           02000       /* Set GID on execution */
#define TSVTX           01000       /* Reserved */
#define TUREAD          00400       /* Read by owner */
#define TUWRITE         00200       /* Write by owner */
#define TUEXEC          00100       /* Execute/Search by owner */
#define TGREAD          00040       /* Read by group */
#define TGWRITE         00020       /* Write by group */
#define TGEXEC          00010       /* Execute/Search by group */
#define TOREAD          00004       /* Read by other */
#define TOWRITE         00002       /* Write by other */
#define TOEXEC          00001       /* Execute/Search by other */

#ifdef _PAX_
/*
 * Pad with a bit mask, much faster than doing a mod but only works on powers
 * of 2. Macro below is for block of 512 bytes.
 */
#define TAR_PAD(x)      ((512 - ((x) & 511)) & 511)
#endif /* _PAX_ */

/*
 * structure of an old tar header as it appeared in BSD releases
 */
00097 typedef struct {
      char name[TNMSZ];       /* name of entry */
      char mode[8];                 /* mode */
      char uid[8];                  /* uid */
      char gid[8];                  /* gid */
      char size[12];                /* size */
      char mtime[12];               /* modification time */
      char chksum[CHK_LEN];         /* checksum */
      char linkflag;                /* norm, hard, or sym. */
      char linkname[TNMSZ];         /* linked to name */
} HD_TAR;

#ifdef _PAX_
/*
 * -o options for BSD tar to not write directories to the archive
 */
#define TAR_NODIR "nodir"
#define TAR_OPTION      "write_opt"

/*
 * default device names
 */
#define     DEV_0       "/dev/rst0"
#define     DEV_1       "/dev/rst1"
#define     DEV_4       "/dev/rst4"
#define     DEV_5       "/dev/rst5"
#define     DEV_7       "/dev/rst7"
#define     DEV_8       "/dev/rst8"
#endif /* _PAX_ */

/*
 * Data Interchange Format - Extended tar header format - POSIX 1003.1-1990
 */
#define TPFSZ           155
#define     TMAGIC            "ustar"           /* ustar and a null */
#define     TMAGLEN           6
#define     TVERSION    "00"        /* 00 and no null */
#define     TVERSLEN    2

00136 typedef struct {
      char name[TNMSZ];       /* name of entry */
      char mode[8];                 /* mode */
      char uid[8];                  /* uid */
      char gid[8];                  /* gid */
      char size[12];                /* size */
      char mtime[12];               /* modification time */
      char chksum[CHK_LEN];         /* checksum */
      char typeflag;                /* type of file. */
      char linkname[TNMSZ];         /* linked to name */
      char magic[TMAGLEN];          /* magic cookie */
      char version[TVERSLEN];       /* version */
      char uname[32];               /* ascii owner name */
      char gname[32];               /* ascii group name */
      char devmajor[8];       /* major device number */
      char devminor[8];       /* minor device number */
      char prefix[TPFSZ];           /* linked to name */
} HD_USTAR;

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