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GNU/Linux |
Debian 6.0.5(Squeeze) |
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Dpkg::Compression(3) |
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Dpkg::Compression − simple database of available compression methods
This modules provides a few public funcions and a public regex to interact with the set of supported compression methods.
$compression_re_file_ext
A regex that matches a file extension of a file compressed with one of the supported compression methods.
my @list = compression_get_list()
Returns a list of supported compression methods (sorted alphabetically).
compression_is_supported($comp)
Returns a boolean indicating whether the give compression method is known and supported.
compression_get_property($comp, $property)
Returns the requested property of the compression method. Returns undef if either the property or the compression method doesn’t exist. Valid properties currently include "file_ext" for the file extension, "comp_prog" for the name of the compression program and "decomp_prog" for the name of the decompression program.
compression_guess_from_filename($filename)
Returns the compression method that is likely used on the indicated filename based on its file extension.
my $comp = compression_get_default()
Return the default compression method. It’s "gzip" unless "compression_set_default" has been used to change it.
compression_set_default($comp)
Change the default compression method. Errors out if the given compression method is not supported.
my $level = compression_get_default_level()
Return the default compression level used when compressing data. It’s "9" unless "compression_set_default_level" has been used to change it.
compression_set_default_level($level)
Change the default compression level. Errors out if the level is not valid (see "compression_is_valid_level"). either a number between 1 and 9 or "fast" or "best".
compression_is_valid_level($level)
Returns a boolean indicating whether $level is a valid compression level (it must be either a number between 1 and 9 or "fast" or "best")
Raphaël Hertzog <hertzog@debian.org>.
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Dpkg::Compression(3) | |