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Contents
require 'binary_struct'
module Ext3
# ////////////////////////////////////////////////////////////////////////////
# // Data definitions.
DIR_ENTRY_ORIGINAL = BinaryStruct.new([
'L', 'inode_val', # Inode address of metadata.
'S', 'entry_len', # Length of entry.
'S', 'name_len', # Length of name.
])
# Here follows the name in ASCII.
SIZEOF_DIR_ENTRY_ORIGINAL = DIR_ENTRY_ORIGINAL.size
DIR_ENTRY_NEW = BinaryStruct.new([
'L', 'inode_val', # Inode address of metadata.
'S', 'entry_len', # Length of entry.
'C', 'name_len', # Length of name.
'C', 'file_type', # Type of file (see FT_ below).
])
# Here follows the name in ASCII.
SIZEOF_DIR_ENTRY_NEW = DIR_ENTRY_NEW.size
class DirectoryEntry
FT_UNKNOWN = 0
FT_FILE = 1
FT_DIRECTORY = 2
FT_CHAR = 3
FT_BLOCK = 4
FT_FIFO = 5
FT_SOCKET = 6
FT_SYM_LNK = 7
attr_reader :inode, :len, :name
attr_accessor :fileType
def initialize(data, new_entry = true)
raise "Ext3::DirectoryEntry.initialize: Nil directory entry data" if data.nil?
@isNew = new_entry
# Both entries are same size.
siz = SIZEOF_DIR_ENTRY_NEW
@de = @isNew ? DIR_ENTRY_NEW.decode(data[0..siz]) : DIR_ENTRY_ORIGINAL.decode(data[0..siz])
# If there's a name get it.
@name = data[siz, @de['name_len']] if @de['name_len'] != 0
@inode = @de['inode_val']
@len = @de['entry_len']
@fileType = @de['file_type'] if @isNew
end
def isDir?
@fileType == FT_DIRECTORY
end
def isSymLink?
@fileType == FT_SYM_LNK
end
def dump
out = "\#<#{self.class}:0x#{'%08x' % object_id}>\n"
out += "Inode : #{inode}\n"
out += "Len : #{len}\n"
out += "Name len: 0x#{'%04x' % @de['name_len']}\n"
out += "Type : #{fileType}\n" if @isNew
out += "Name : #{name}\n"
end
end # class
end # module
Version data entries
66 entries across 66 versions & 1 rubygems