contrib/file-4/src/tar.h

   1 /*
   2  * Copyright (c) Ian F. Darwin 1986-1995.
   3  * Software written by Ian F. Darwin and others;
   4  * maintained 1995-present by Christos Zoulas and others.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice immediately at the beginning of the file, without modification,
  11  *    this list of conditions, and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  20  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28 /*
  29  * Header file for public domain tar (tape archive) program.
  30  *
  31  * @(#)tar.h 1.20 86/10/29      Public Domain.
  32  *
  33  * Created 25 August 1985 by John Gilmore, ihnp4!hoptoad!gnu.
  34  *
  35  * $Id: tar.h,v 1.8 2004/09/11 19:15:58 christos Exp $ # checkin only
  36  */
  37
  38 /*
  39  * Kludge for handling systems that cannot cope with multiple
  40  * external definitions of a variable.  In ONE routine (tar.c),
  41  * we #define TAR_EXTERN to null; here, we set it to "extern" if
  42  * it is not already set.
  43  */
  44 #ifndef TAR_EXTERN
  45 #define TAR_EXTERN extern
  46 #endif
  47
  48 /*
  49  * Header block on tape.
  50  *
  51  * I'm going to use traditional DP naming conventions here.
  52  * A "block" is a big chunk of stuff that we do I/O on.
  53  * A "record" is a piece of info that we care about.
  54  * Typically many "record"s fit into a "block".
  55  */
  56 #define RECORDSIZE      512
  57 #define NAMSIZ  100
  58 #define TUNMLEN 32
  59 #define TGNMLEN 32
  60
  61 union record {
  62         char            charptr[RECORDSIZE];
  63         struct header {
  64                 char    name[NAMSIZ];
  65                 char    mode[8];
  66                 char    uid[8];
  67                 char    gid[8];
  68                 char    size[12];
  69                 char    mtime[12];
  70                 char    chksum[8];
  71                 char    linkflag;
  72                 char    linkname[NAMSIZ];
  73                 char    magic[8];
  74                 char    uname[TUNMLEN];
  75                 char    gname[TGNMLEN];
  76                 char    devmajor[8];
  77                 char    devminor[8];
  78         } header;
  79 };
  80
  81 /* The checksum field is filled with this while the checksum is computed. */
  82 #define CHKBLANKS       "        "      /* 8 blanks, no null */
  83
  84 /* The magic field is filled with this if uname and gname are valid. */
  85 #define TMAGIC          "ustar  "       /* 7 chars and a null */
  86
  87 /* The linkflag defines the type of file */
  88 #define LF_OLDNORMAL    '\0'            /* Normal disk file, Unix compat */
  89 #define LF_NORMAL       '0'             /* Normal disk file */
  90 #define LF_LINK         '1'             /* Link to previously dumped file */
  91 #define LF_SYMLINK      '2'             /* Symbolic link */
  92 #define LF_CHR          '3'             /* Character special file */
  93 #define LF_BLK          '4'             /* Block special file */
  94 #define LF_DIR          '5'             /* Directory */
  95 #define LF_FIFO         '6'             /* FIFO special file */
  96 #define LF_CONTIG       '7'             /* Contiguous file */
  97 /* Further link types may be defined later. */
  98
  99 /*
 100  * Exit codes from the "tar" program
 101  */
 102 #define EX_SUCCESS      0               /* success! */
 103 #define EX_ARGSBAD      1               /* invalid args */
 104 #define EX_BADFILE      2               /* invalid filename */
 105 #define EX_BADARCH      3               /* bad archive */
 106 #define EX_SYSTEM       4               /* system gave unexpected error */
 107
 108
 109 /*
 110  * Global variables
 111  */
 112 TAR_EXTERN union record *ar_block;      /* Start of block of archive */
 113 TAR_EXTERN union record *ar_record;     /* Current record of archive */
 114 TAR_EXTERN union record *ar_last;       /* Last+1 record of archive block */
 115 TAR_EXTERN char         ar_reading;     /* 0 writing, !0 reading archive */
 116 TAR_EXTERN int          blocking;       /* Size of each block, in records */
 117 TAR_EXTERN int          blocksize;      /* Size of each block, in bytes */
 118 TAR_EXTERN char         *ar_file;       /* File containing archive */
 119 TAR_EXTERN char         *name_file;     /* File containing names to work on */
 120 TAR_EXTERN char         *tar;           /* Name of this program */
 121
 122 /*
 123  * Flags from the command line
 124  */
 125 TAR_EXTERN char f_reblock;              /* -B */
 126 TAR_EXTERN char f_create;               /* -c */
 127 TAR_EXTERN char f_debug;                /* -d */
 128 TAR_EXTERN char f_sayblock;             /* -D */
 129 TAR_EXTERN char f_follow_links;         /* -h */
 130 TAR_EXTERN char f_ignorez;              /* -i */
 131 TAR_EXTERN char f_keep;                 /* -k */
 132 TAR_EXTERN char f_modified;             /* -m */
 133 TAR_EXTERN char f_oldarch;              /* -o */
 134 TAR_EXTERN char f_use_protection;       /* -p */
 135 TAR_EXTERN char f_sorted_names;         /* -s */
 136 TAR_EXTERN char f_list;                 /* -t */
 137 TAR_EXTERN char f_namefile;             /* -T */
 138 TAR_EXTERN char f_verbose;              /* -v */
 139 TAR_EXTERN char f_extract;              /* -x */
 140 TAR_EXTERN char f_compress;             /* -z */
 141
 142 /*
 143  * We now default to Unix Standard format rather than 4.2BSD tar format.
 144  * The code can actually produce all three:
 145  *      f_standard      ANSI standard
 146  *      f_oldarch       V7
 147  *      neither         4.2BSD
 148  * but we don't bother, since 4.2BSD can read ANSI standard format anyway.
 149  * The only advantage to the "neither" option is that we can cmp(1) our
 150  * output to the output of 4.2BSD tar, for debugging.
 151  */
 152 #define         f_standard              (!f_oldarch)
 153
 154 /*
 155  * Structure for keeping track of filenames and lists thereof.
 156  */
 157 struct name {
 158         struct name     *next;
 159         short           length;
 160         char            found;
 161         char            name[NAMSIZ+1];
 162 };
 163
 164 TAR_EXTERN struct name  *namelist;      /* Points to first name in list */
 165 TAR_EXTERN struct name  *namelast;      /* Points to last name in list */
 166
 167 TAR_EXTERN int          archive;        /* File descriptor for archive file */
 168 TAR_EXTERN int          errors;         /* # of files in error */
 169
 170 /*
 171  *
 172  * Due to the next struct declaration, each routine that includes
 173  * "tar.h" must also include <sys/types.h>.  I tried to make it automatic,
 174  * but System V has no defines in <sys/types.h>, so there is no way of
 175  * knowing when it has been included.  In addition, it cannot be included
 176  * twice, but must be included exactly once.  Argghh!
 177  *
 178  * Thanks, typedef.  Thanks, USG.
 179  */
 180 struct link {
 181         struct link     *next;
 182         dev_t           dev;
 183         ino_t           ino;
 184         short           linkcount;
 185         char            name[NAMSIZ+1];
 186 };
 187
 188 TAR_EXTERN struct link  *linklist;      /* Points to first link in list */
 189
 190
 191 /*
 192  * Error recovery stuff
 193  */
 194 TAR_EXTERN char         read_error_flag;
 195
 196
 197 #if 0
 198 /*
 199  * Declarations of functions available to the world.
 200  */
 201 /*LINTLIBRARY*/
 202 #define  annorec(stream, msg)   anno(stream, msg, 0)    /* Cur rec */
 203 #define annofile(stream, msg)   anno(stream, msg, 1)    /* Saved rec */
 204 #endif