Archive::Tar::File - perldoc.perl.org

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- Site maintained by
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- Last updated on
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Archive::Tar::File

- NAME
- SYNOPSIS
- DESCRIPTION
  - Accessors
- Methods
  - new( file => $path )
  - new( data => $path, $data, $opt )
  - new( chunk => $chunk )
  - full_path
  - validate
  - has_content
  - get_content
  - get_content_by_ref
  - replace_content( $content )
  - rename( $new_name )
- Convenience methods

# NAME

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

# 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

## new( file => $path )

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

Returns undef on failure.

## 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.

## new( chunk => $chunk )

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

Returns undef on failure.

## full_path

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

## 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

## 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.

## get_content

Returns the current content for the in-memory 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.

## 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.

## 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:

- is_file

  Returns true if the file is of type `file`

- is_dir

  Returns true if the file is of type `dir`

- is_hardlink

  Returns true if the file is of type `hardlink`

- is_symlink

  Returns true if the file is of type `symlink`

- is_chardev

  Returns true if the file is of type `chardev`

- is_blockdev

  Returns true if the file is of type `blockdev`

- is_fifo

  Returns true if the file is of type `fifo`

- is_socket

  Returns true if the file is of type `socket`

- is_longlink

  Returns true if the file is of type `LongLink` . Should not happen after a successful `read`.

- is_label

  Returns true if the file is of type `Label` . Should not happen after a successful `read`.

- is_unknown

  Returns true if the file type is `unknown`

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