Class: CPIO::ASCIIReader

Inherits:
Object
  • Object
show all
Defined in:
lib/excavate/extractors/cpio/cpio.rb

Constant Summary collapse

FIELD_SIZES = 
{
  :magic => 6,
  :ino => 8,
  :mode => 8,
  :uid => 8,
  :gid => 8,
  :nlink => 8,
  :mtime => 8,
  :filesize => 8,
  :devmajor => 8,
  :devminor => 8,
  :rdevmajor => 8,
  :rdevminor => 8,
  :namesize => 8,
  :check => 8
}
HEADER_LENGTH = 
FIELD_SIZES.reduce(0) { |m, (_, v)| m + v }
HEADER_PACK = 
FIELD_SIZES.collect { |_, v| "A#{v}" }.join
FIELD_ORDER = 
[
  :magic, :ino, :mode, :uid, :gid, :nlink, :mtime, :filesize, :devmajor,
  :devminor, :rdevmajor, :rdevminor, :namesize, :check
]

Instance Method Summary collapse

Constructor Details

#initialize(io) ⇒ ASCIIReader

Returns a new instance of ASCIIReader.



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# File 'lib/excavate/extractors/cpio/cpio.rb', line 71

def initialize(io)
  @io = io
end

Instance Method Details

#each(&block) ⇒ Object 



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# File 'lib/excavate/extractors/cpio/cpio.rb', line 81

def each(&block)
  while true
    entry = read
    break if entry.nil?
    # The CPIO format has the end-of-stream marker as a file called "TRAILER!!!"
    break if entry.name == "TRAILER!!!"
    block.call(entry, entry.file)
    verify_correct_read(entry) unless entry.directory?
  end
end