Class: Iso9660::SymbolicLink

Inherits:
Object
  • Object
show all
Defined in:
lib/fs/iso9660/rock_ridge.rb

Overview

RESERVED1: Historically, this component has referred to the directory on which the current CD-ROM is mounted. Reserved2: Historically, this component has contained the network node name of the current system as defined in the uname structure of POSIX 4.4.1.2

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(data, _suff) ⇒ SymbolicLink

Returns a new instance of SymbolicLink.



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# File 'lib/fs/iso9660/rock_ridge.rb', line 135

def initialize(data, _suff)
  sl = RR_SL.decode(data)

  # Reader data.
  @flags = sl['flags']
  @linkData = assembleComponents(sl['components'])
end

Instance Attribute Details

#flags ⇒ Object (readonly)

Returns the value of attribute flags.



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# File 'lib/fs/iso9660/rock_ridge.rb', line 132

def flags
  @flags
end

#linkData ⇒ Object

Returns the value of attribute linkData.



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# File 'lib/fs/iso9660/rock_ridge.rb', line 133

def linkData
  @linkData
end

Instance Method Details

#assembleComponents(data) ⇒ Object 



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# File 'lib/fs/iso9660/rock_ridge.rb', line 143

def assembleComponents(data)
  out = ""; offset = 0
  loop do
    comp = RR_SL_COMPONENT.decode(data[offset..-1])

    # Check for referential flags.
    out += "./" if comp['flags'] & RR_EXT_SLCOMPF_CURRENT != 0
    out += "../" if comp['flags'] & RR_EXT_SLCOMPF_PARENT != 0
    out += "/" if comp['flags'] & RR_EXT_SLCOMPF_ROOT != 0

    # Advance offset, append content (if any) & check for done.
    # puts "Component content:"
    # comp['content'][0, comp['length']].hex_dump(:obj => STDOUT, :meth => :puts, :newline => false)
    # puts "\n\n"
    offset += comp['length'] + 2 # compensate for first two bytes of component.
    next if comp['length'] == 0
    out = File.join(out, comp['content'][0, comp['length']])
    # break if comp['flags'] & RR_EXT_SLCOMPF_CONTINUE == 0
    # Analysis of real data shows the condition is offset >= data len.
    break if offset >= data.length
  end
  # puts "Total content:"
  # out.hex_dump(:obj => STDOUT, :meth => :puts, :newline => false)
  # puts "\n\n"
  out
end