Fsize in default: stanza. Post: 302868155

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Operating Systems AIX Fsize in default: stanza. Post 302868155 by Don Cragun on Saturday 26th of October 2013 08:13:50 AM

10-26-2013

Registered User

Quote:

Originally Posted by bakunin

The AIX tar adheres to the USTAR standard, which in turn means: no single input file processed by tar can be larger than 8 GB, but the archive itself can be of (nearly) unlimited size. The reason for the limitation is the data structure of the USTAR header which can't hold size information of more than 8 GB.

I hope this helps.

bakunin

The pax utility (with the -x pax option to set the archive format) provides extensions to the ustar archive format to remove the ustar format file size limits. When using the pax archive format, any size file can be saved in an archive as long as the archive created will fit into whatever device or filesystem is used to contain the archive.

Some implementations of cpio and tar (as well as the pax utility) are able to create and read pax format archives.

Don Cragun

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archive_write_set_format_ustar

ARCHIVE_WRITE_FORMAT(3) 				   BSD Library Functions Manual 				   ARCHIVE_WRITE_FORMAT(3)

NAME

     archive_write_set_format_cpio, archive_write_set_format_pax, archive_write_set_format_pax_restricted, archive_write_set_format_shar,
     archive_write_set_format_shar_dump, archive_write_set_format_ustar -- functions for creating archives

LIBRARY

     Streaming Archive Library (libarchive, -larchive)

SYNOPSIS

     #include <archive.h>

     int
     archive_write_set_format_cpio(struct archive *);

     int
     archive_write_set_format_pax(struct archive *);

     int
     archive_write_set_format_pax_restricted(struct archive *);

     int
     archive_write_set_format_shar(struct archive *);

     int
     archive_write_set_format_shar_dump(struct archive *);

     int
     archive_write_set_format_ustar(struct archive *);

DESCRIPTION

     These functions set the format that will be used for the archive.

     The library can write POSIX octet-oriented cpio format archives, POSIX-standard ``pax interchange'' format archives, traditional ``shar'' ar-
     chives, enhanced ``dump'' shar archives that store a variety of file attributes and handle binary files, and POSIX-standard ``ustar'' ar-
     chives.  The pax interchange format is a backwards-compatible tar format that adds key/value attributes to each entry and supports arbitrary
     filenames, linknames, uids, sizes, etc.  ``Restricted pax interchange format'' is the library default; this is the same as pax format, but
     suppresses the pax extended header for most normal files.	In most cases, this will result in ordinary ustar archives.

RETURN VALUES

     These functions return ARCHIVE_OK on success, or ARCHIVE_FATAL.

ERRORS

     Detailed error codes and textual descriptions are available from the archive_errno() and archive_error_string() functions.

SEE ALSO

     tar(1), libarchive(3), archive_write(3), archive_write_set_options(3), cpio(5), mtree(5), tar(5)

BSD
								 February 2, 2012							       BSD