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PROLOG

       This  manual  page  is part of the POSIX Programmer's Manual.  The Linux implementation of this interface
       may differ (consult the corresponding Linux manual page for details of Linux behavior), or the  interface
       may not be implemented on Linux.

NAME

       tar.h — extended tar definitions

SYNOPSIS

       #include <tar.h>

DESCRIPTION

       The <tar.h> header shall define the following symbolic constants with the indicated values.

       General definitions:

       ┌───────────┬────────────┬────────────────────────────────────────┐
       │   NameValueDescription               │
       ├───────────┼────────────┼────────────────────────────────────────┤
       │TMAGIC     │  "ustar"   │ Used  in  the magic field in the ustar │
       │           │            │ header block, including  the  trailing │
       │           │            │ null byte.                             │
       │TMAGLEN    │     6      │ Length in octets of the magic field.   │
       │TVERSION   │    "00"    │ Used in the version field in the ustar │
       │           │            │ header block, excluding  the  trailing │
       │           │            │ null byte.                             │
       │TVERSLEN   │     2      │ Length in octets of the version field. │
       └───────────┴────────────┴────────────────────────────────────────┘
       Typeflag field definitions:

       ┌───────────┬────────────┬────────────────────────────────┐
       │   NameValueDescription           │
       ├───────────┼────────────┼────────────────────────────────┤
       │REGTYPE    │    '0'     │ Regular file.                  │
       │AREGTYPE   │    '\0'    │ Regular file.                  │
       │LNKTYPE    │    '1'     │ Link.                          │
       │SYMTYPE    │    '2'     │ Symbolic link.                 │
       │CHRTYPE    │    '3'     │ Character special.             │
       │BLKTYPE    │    '4'     │ Block special.                 │
       │DIRTYPE    │    '5'     │ Directory.                     │
       │FIFOTYPE   │    '6'     │ FIFO special.                  │
       │CONTTYPE   │    '7'     │ Reserved.                      │
       └───────────┴────────────┴────────────────────────────────┘
       Mode field bit definitions (octal):

       ┌───────────┬────────────┬──────────────────────────────────────────────┐
       │   NameValueDescription                  │
       ├───────────┼────────────┼──────────────────────────────────────────────┤
       │TSUID      │   04000    │ Set UID on execution.                        │
       │TSGID      │   02000    │ Set GID on execution.                        │
       │TSVTX      │   01000    │ On directories, restricted deletion flag.    │
       │TUREAD     │   00400    │ Read by owner.                               │
       │TUWRITE    │   00200    │ Write by owner special.                      │
       │TUEXEC     │   00100    │ Execute/search by owner.                     │
       │TGREAD     │   00040    │ Read by group.                               │
       │TGWRITE    │   00020    │ Write by group.                              │
       │TGEXEC     │   00010    │ Execute/search by group.                     │
       │TOREAD     │   00004    │ Read by other.                               │
       │TOWRITE    │   00002    │ Write by other.                              │
       │TOEXEC     │   00001    │ Execute/search by other.                     │
       └───────────┴────────────┴──────────────────────────────────────────────┘
       The following sections are informative.

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       The Shell and Utilities volume of POSIX.1‐2017, pax

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1-2017, Standard
       for Information  Technology  --  Portable  Operating  System  Interface  (POSIX),  The  Open  Group  Base
       Specifications  Issue  7, 2018 Edition, Copyright (C) 2018 by the Institute of Electrical and Electronics
       Engineers, Inc and The Open Group.  In the event of any discrepancy between this version and the original
       IEEE  and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document.
       The original Standard can be obtained online at http://www.opengroup.org/unix/online.html .

       Any typographical or formatting errors that appear in this page are most likely to have  been  introduced
       during   the   conversion  of  the  source  files  to  man  page  format.  To  report  such  errors,  see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .