tar(n)                         Tar file handling                        tar(n)



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NAME
       tar - Tar file creation, extraction & manipulation

SYNOPSIS
       package require Tcl  8.4

       package require tar  ?0.7?

       ::tar::contents tarball ?-chan?

       ::tar::stat tarball ?file? ?-chan?

       ::tar::untar tarball args

       ::tar::get tarball fileName ?-chan?

       ::tar::create tarball files args

       ::tar::add tarball files args

       ::tar::remove tarball files

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DESCRIPTION
       ::tar::contents tarball ?-chan?
              Returns a list of the files contained in tarball. The order is
              not sorted and depends on the order files were stored in the
              archive.

              If the option -chan is present tarball is interpreted as an open
              channel.  It is assumed that the channel was opened for reading,
              and configured for binary input.  The command will not close the
              channel.

       ::tar::stat tarball ?file? ?-chan?
              Returns a nested dict containing information on the named ?file?
              in tarball, or all files if none is specified. The top level are
              pairs of filename and info. The info is a dict with the keys
              "mode uid gid size mtime type linkname uname gname devmajor
              devminor"


              % ::tar::stat tarball.tar
              foo.jpg {mode 0644 uid 1000 gid 0 size 7580 mtime 811903867 type file linkname {} uname user gname wheel devmajor 0 devminor 0}


       If the option -chan is present tarball is interpreted as an open
       channel.  It is assumed that the channel was opened for reading, and
       configured for binary input.  The command will not close the channel.

       ::tar::untar tarball args
              Extracts tarball. -file and -glob limit the extraction to files
              which exactly match or pattern match the given argument. No
              error is thrown if no files match. Returns a list of filenames
              extracted and the file size. The size will be null for non
              regular files. Leading path seperators are stripped so paths
              will always be relative.

              -dir dirName
                     Directory to extract to. Uses pwd if none is specified

              -file fileName
                     Only extract the file with this name. The name is matched
                     against the complete path stored in the archive including
                     directories.

              -glob pattern
                     Only extract files patching this glob style pattern. The
                     pattern is matched against the complete path stored in
                     the archive.

              -nooverwrite
                     Dont overwrite files that already exist

              -nomtime
                     Leave the file modification time as the current time
                     instead of setting it to the value in the archive.

              -noperms
                     In Unix, leave the file permissions as the current umask
                     instead of setting them to the values in the archive.

              -chan  If this option is present tarball is interpreted as an
                     open channel.  It is assumed that the channel was opened
                     for reading, and configured for binary input.  The
                     command will not close the channel.



              % foreach {file size} [::tar::untar tarball.tar -glob *.jpg] {
              puts "Extracted $file ($size bytes)"
              }


       ::tar::get tarball fileName ?-chan?
              Returns the contents of fileName from the tarball



              % set readme [::tar::get tarball.tar doc/README] {
              % puts $readme
              }


       If the option -chan is present tarball is interpreted as an open
       channel.  It is assumed that the channel was opened for reading, and
       configured for binary input.  The command will not close the channel.

       ::tar::create tarball files args
              Creates a new tar file containing the files. files must be
              specified as a single argument which is a proper list of
              filenames.

              -dereference
                     Normally create will store links as an actual link
                     pointing at a file that may or may not exist in the
                     archive. Specifying this option will cause the actual
                     file point to by the link to be stored instead.

              -chan  If this option is present tarball is interpreted as an
                     open channel.  It is assumed that the channel was opened
                     for writing, and configured for binary output.  The
                     command will not close the channel.



              % ::tar::create new.tar [glob -nocomplain file*]
              % ::tar::contents new.tar
              file1 file2 file3


       ::tar::add tarball files args
              Appends files to the end of the existing tarball. files must be
              specified as a single argument which is a proper list of
              filenames.

              -dereference
                     Normally add will store links as an actual link pointing
                     at a file that may or may not exist in the archive.
                     Specifying this option will cause the actual file point
                     to by the link to be stored instead.

              -prefix string
                     Normally add will store files under exactly the name
                     specified as argument. Specifying a ?-prefix? causes the
                     string to be prepended to every name.

              -quick The only sure way to find the position in the tarball
                     where new files can be added is to read it from start,
                     but if tarball was written with a "blocksize" of 1 (as
                     this package does) then one can alternatively find this
                     position by seeking from the end. The ?-quick? option
                     tells add to do the latter.


       ::tar::remove tarball files
              Removes files from the tarball. No error will result if the file
              does not exist in the tarball. Directory write permission and
              free disk space equivalent to at least the size of the tarball
              will be needed.


              % ::tar::remove new.tar {file2 file3}
              % ::tar::contents new.tar
              file3


BUGS, IDEAS, FEEDBACK
       This document, and the package it describes, will undoubtedly contain
       bugs and other problems.  Please report such in the category tar of the
       Tcllib SF Trackers [http://sourceforge.net/tracker/?group_id=12883].
       Please also report any ideas for enhancements you may have for either
       package and/or documentation.

KEYWORDS
       archive, tape archive, tar

CATEGORY
       File formats



tar                                   0.7                               tar(n)
