lib/zip/extra_field/unix.rb
module Zip
# Info-ZIP Extra for UNIX uid/gid
class ExtraField::IUnix < ExtraField::Generic
HEADER_ID = "Ux"
register_map
def initialize(binstr = nil)
@uid = 0
@gid = 0
binstr and merge(binstr)
end
attr_accessor :uid, :gid
def merge(binstr)
return if binstr.empty?
size, content = initial_parse(binstr)
# size: 0 for central directory. 4 for local header
return if (!size || size == 0)
uid, gid = content.unpack("vv")
@uid ||= uid
@gid ||= gid
end
def ==(other)
@uid == other.uid && @gid == other.gid
end
def pack_for_local
[@uid, @gid].pack("vv")
end
def pack_for_c_dir
''
end
end
end