Class: CPIO::ArchiveEntry

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

Constant Summary collapse

TrailerMagic = 
"TRAILER!!!"
S_IFMT =

bitmask for the file type bitfields

0170000
S_IFREG =

regular file

0100000
S_IFDIR =

directory

0040000
ExecutableMask =

Owner executable

(0100 | # Owner executable
0010 | # Group executable
0001)

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(header, filename, data) ⇒ ArchiveEntry

Returns a new instance of ArchiveEntry.



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# File 'lib/excavate/extractors/cpio/cpio_old_format.rb', line 152

def initialize(header, filename, data)
  @header = header
  @filename = filename
  @data = data
end

Instance Attribute Details

#data ⇒ Object (readonly)

Other executable



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# File 'lib/excavate/extractors/cpio/cpio_old_format.rb', line 121

def data
  @data
end

#filename ⇒ Object (readonly)

Other executable



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# File 'lib/excavate/extractors/cpio/cpio_old_format.rb', line 121

def filename
  @filename
end

Class Method Details

.from(io) ⇒ Object 



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# File 'lib/excavate/extractors/cpio/cpio_old_format.rb', line 127

def self.from(io)
  header = ArchiveHeader.from(io)
  filename = read_filename(header, io)
  data = read_data(header, io)
  new(header, filename, data)
end

.new_directory(opts) ⇒ Object 



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# File 'lib/excavate/extractors/cpio/cpio_old_format.rb', line 134

def self.new_directory(opts)
  mode = S_IFDIR | opts[:mode]
  header = ArchiveHeader.with_defaults(:mode => mode, :name => opts[:name], :filesize => 0)
  new(header, opts[:name], '')
end

.new_file(opts) ⇒ Object 



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# File 'lib/excavate/extractors/cpio/cpio_old_format.rb', line 140

def self.new_file(opts)
  mode = S_IFREG | opts[:mode]
  header = ArchiveHeader.with_defaults(:mode => mode, :name => opts[:name], :filesize => opts[:io].size)
  opts[:io].rewind
  new(header, opts[:name], opts[:io].read)
end

.new_trailer ⇒ Object 



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# File 'lib/excavate/extractors/cpio/cpio_old_format.rb', line 147

def self.new_trailer
  header = ArchiveHeader.with_defaults(:mode => S_IFREG, :name => TrailerMagic, :filesize => 0)
  new(header, TrailerMagic, '')
end

Instance Method Details

#directory? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/excavate/extractors/cpio/cpio_old_format.rb', line 162

def directory?
  mode & S_IFMT == S_IFDIR
end

#executable? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/excavate/extractors/cpio/cpio_old_format.rb', line 170

def executable?
  (mode & ExecutableMask) != 0
end

#file? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/excavate/extractors/cpio/cpio_old_format.rb', line 166

def file?
  mode & S_IFMT == S_IFREG
end

#mode ⇒ Object 



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# File 'lib/excavate/extractors/cpio/cpio_old_format.rb', line 174

def mode
  @mode ||= sprintf('%o', @header.mode).to_s.oct
end

#to_data ⇒ Object 



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# File 'lib/excavate/extractors/cpio/cpio_old_format.rb', line 178

def to_data
  sprintf("%s%s\000%s", @header.to_data, filename, data)
end

#trailer? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/excavate/extractors/cpio/cpio_old_format.rb', line 158

def trailer?
  @filename == TrailerMagic && @data.size == 0
end