Manual Reference Pages  - Archive::Tar::File (3)

NAME

Archive::Tar::File - a subclass for in-memory extracted file from Archive::Tar

CONTENTS

SYNOPSIS



    my @items = $tar->get_files;





    print $_->name, ’ ’, $_->size, "\n" for @items;





    print $object->get_content;
    $object->replace_content(’new content’);





    $object->rename( ’new/full/path/to/file.c’ );



DESCRIPTION

Archive::Tar::Files provides a neat little object layer for in-memory extracted files. It’s mostly used internally in Archive::Tar to tidy up the code, but there’s no reason users shouldn’t use this API as well.

Accessors

A lot of the methods in this package are accessors to the various fields in the tar header:
name The file’s name
mode The file’s mode
uid The user id owning the file
gid The group id owning the file
size File size in bytes
mtime Modification time. Adjusted to mac-time on MacOS if required
chksum Checksum field for the tar header
type File type — numeric, but comparable to exported constants — see Archive::Tar’s documentation
linkname If the file is a symlink, the file it’s pointing to
magic Tar magic string — not useful for most users
version Tar version string — not useful for most users
uname The user name that owns the file
gname The group name that owns the file
devmajor Device major number in case of a special file
devminor Device minor number in case of a special file
prefix Any directory to prefix to the extraction path, if any
raw Raw tar header — not useful for most users

Methods

Archive::Tar::File->new( file => $path )

Returns a new Archive::Tar::File object from an existing file.

Returns undef on failure.

Archive::Tar::File->new( data => $path, $data, $opt )

Returns a new Archive::Tar::File object from data.

$path defines the file name (which need not exist), $data the file contents, and $opt is a reference to a hash of attributes which may be used to override the default attributes (fields in the tar header), which are described above in the Accessors section.

Returns undef on failure.

Archive::Tar::File->new( chunk => $chunk )

Returns a new Archive::Tar::File object from a raw 512-byte tar archive chunk.

Returns undef on failure.

$bool = $file->extract( [ $alternative_name ] )

Extract this object, optionally to an alternative name.

See Archive::Tar->extract_file for details.

Returns true on success and false on failure.

$path = $file->full_path

Returns the full path from the tar header; this is basically a concatenation of the prefix and name fields.

$bool = $file->validate

Done by Archive::Tar internally when reading the tar file: validate the header against the checksum to ensure integer tar file.

Returns true on success, false on failure

$bool = $file->has_content

Returns a boolean to indicate whether the current object has content. Some special files like directories and so on never will have any content. This method is mainly to make sure you don’t get warnings for using uninitialized values when looking at an object’s content.

$content = $file->get_content

Returns the current content for the in-memory file

$cref = $file->get_content_by_ref

Returns the current content for the in-memory file as a scalar reference. Normal users won’t need this, but it will save memory if you are dealing with very large data files in your tar archive, since it will pass the contents by reference, rather than make a copy of it first.

$bool = $file->replace_content( $content )

Replace the current content of the file with the new content. This only affects the in-memory archive, not the on-disk version until you write it.

Returns true on success, false on failure.

$bool = $file->rename( $new_name )

Rename the current file to $new_name.

Note that you must specify a Unix path for $new_name, since per tar standard, all files in the archive must be Unix paths.

Returns true on success and false on failure.

Convenience methods

To quickly check the type of a Archive::Tar::File object, you can use the following methods:
$file->is_file Returns true if the file is of type file
$file->is_dir Returns true if the file is of type dir
$file->is_hardlink Returns true if the file is of type hardlink
$file->is_symlink Returns true if the file is of type symlink
$file->is_chardev Returns true if the file is of type chardev
$file->is_blockdev Returns true if the file is of type blockdev
$file->is_fifo Returns true if the file is of type fifo
$file->is_socket Returns true if the file is of type socket
$file->is_longlink Returns true if the file is of type LongLink. Should not happen after a successful read.
$file->is_label Returns true if the file is of type Label. Should not happen after a successful read.
$file->is_unknown Returns true if the file type is unknown


perl v5.8.8 Archive::Tar::File (3) 2010-08-04
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