/[tar]/tar/src/tar.h
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revision 1.18 by gray, Sun Aug 31 22:38:55 2003 UTC revision 1.19 by gray, Mon Sep 1 17:03:07 2003 UTC
# Line 17  Line 17 
17     with this program; if not, write to the Free Software Foundation, Inc.,     with this program; if not, write to the Free Software Foundation, Inc.,
18     59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */     59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
19    
 /* If OLDGNU_COMPATIBILITY is not zero, tar produces archives which, by  
    default, are readable by older versions of GNU tar.  This can be  
    overriden by using --posix; in this case, POSIXLY_CORRECT in environment  
    may be set for enforcing stricter conformance.  If OLDGNU_COMPATIBILITY  
    is zero or undefined, tar will eventually produces archives which, by  
    default, POSIX compatible; then either using --posix or defining  
    POSIXLY_CORRECT enforces stricter conformance.  
   
    This #define will disappear in a few years.  FP, June 1995.  */  
 #define OLDGNU_COMPATIBILITY 1  
   
20  /* tar Header Block, from POSIX 1003.1-1990.  */  /* tar Header Block, from POSIX 1003.1-1990.  */
21    
22  /* POSIX header.  */  /* POSIX header.  */
# Line 149  struct sparse Line 138  struct sparse
138  #define SPARSES_IN_OLDGNU_HEADER 4  #define SPARSES_IN_OLDGNU_HEADER 4
139  #define SPARSES_IN_SPARSE_HEADER 21  #define SPARSES_IN_SPARSE_HEADER 21
140    
 /* The GNU extra header contains some information GNU tar needs, but not  
    foreseen in POSIX header format.  It is only used after a POSIX header  
    (and never with old GNU headers), and immediately follows this POSIX  
    header, when typeflag is a letter rather than a digit, so signaling a GNU  
    extension.  */  
   
 struct extra_header  
 {                               /* byte offset */  
   char atime[12];               /*   0 */  
   char ctime[12];               /*  12 */  
   char offset[12];              /*  24 */  
   char realsize[12];            /*  36 */  
   char longnames[4];            /*  48 */  
   char unused_pad1[68];         /*  52 */  
   struct sparse sp[SPARSES_IN_EXTRA_HEADER];  
                                 /* 120 */  
   char isextended;              /* 504 */  
                                 /* 505 */  
 };  
   
141  /* Extension header for sparse files, used immediately after the GNU extra  /* Extension header for sparse files, used immediately after the GNU extra
142     header, and used only if all sparse information cannot fit into that     header, and used only if all sparse information cannot fit into that
143     extra header.  There might even be many such extension headers, one after     extra header.  There might even be many such extension headers, one after
# Line 277  union block Line 246  union block
246    char buffer[BLOCKSIZE];    char buffer[BLOCKSIZE];
247    struct posix_header header;    struct posix_header header;
248    struct star_header star_header;    struct star_header star_header;
   struct extra_header extra_header;  
249    struct oldgnu_header oldgnu_header;    struct oldgnu_header oldgnu_header;
250    struct sparse_header sparse_header;    struct sparse_header sparse_header;
251  };  };

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