Tar and un-tar issue

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LEARN ABOUT PLAN9

tar

TAR(1)							      General Commands Manual							    TAR(1)

NAME

       tar - archiver

SYNOPSIS

       tar key [ file ...  ]

DESCRIPTION

       Tar  saves  and	restores  file trees.  It is most often used to transport a tree of files from one system to another.  The key is a string
       that contains at most one function letter plus optional modifiers.  Other arguments to the command are names of files or directories to	be
       dumped or restored.  A directory name implies all the contained files and subdirectories (recursively).

       The function is one of the following letters:

       c      Create a new archive with the given files as contents.

       x      Extract  the named files from the archive.  If a file is a directory, the directory is extracted recursively.  Modes are restored if
	      possible.  If no file argument is given, extract the entire archive.  If the archive contains multiple entries for a file, the  lat-
	      est one wins.

       t      List all occurrences of each file in the archive, or of all files if there are no file arguments.

       r      The named files are appended to the archive.

       The modifiers are:

       v      (verbose) Print the name of each file treated preceded by the function letter.  With t, give more details about the archive entries.

       f      Use  the	next  argument as the name of the archive instead of the default standard input (for keys x and t) or standard output (for
	      keys c and r).

       u      Use the next (numeric) argument as the user id for files in the output archive.  This is only useful when moving files to a non-Plan
	      9 system.

       g      Use the next (numeric) argument as the group id for files in the output archive.

EXAMPLES

       Tar can be used to copy hierarchies thus:

	      {cd fromdir; tar c .} | {cd todir; tar x}

SOURCE

       /sys/src/cmd/tar.c

SEE ALSO

       ar(1), bundle(1), tapefs(1)

BUGS

       There is no way to ask for any but the last occurrence of a file.
       File path names are limited to 100 characters.
       The tar format allows specification of links and symbolic links, concepts foreign to Plan 9: they are ignored.

																	    TAR(1)

Shell Programming and Scripting