Class: MountInspector

Inherits:
Object
  • Object
show all
Defined in:
lib/ec2-consistent-backup.rb

Instance Method Summary collapse

Constructor Details

#initialize(file = '/etc/mtab') ⇒ MountInspector

Returns a new instance of MountInspector.



66
67
68
69
70
71
72
73
 
# File 'lib/ec2-consistent-backup.rb', line 66

def initialize(file = '/etc/mtab')
  @dev_to_fs = {}
  @fs_to_dev = {}
  File.open(file).read.split(/\n/).map {|line| line.split(/ /)[0..1]}.each do |m|
    @dev_to_fs[m[0]] = m[1] if m[0] != "none"
    @fs_to_dev[m[1]] = m[0] if m[1] != "none"
  end
end

Instance Method Details

#where_is_mounted(device) ⇒ Object

Raises:



74
75
76
77
 
# File 'lib/ec2-consistent-backup.rb', line 74

def where_is_mounted(device)
  return @dev_to_fs[device] if @dev_to_fs.has_key?(device) 
  raise NotMountedException.new(device)
end

#which_device(folder) ⇒ Object

Raises:



78
79
80
81
82
83
84
85
86
87
88
89
 
# File 'lib/ec2-consistent-backup.rb', line 78

def which_device(folder)
  # Level 0 optimisation+ Handle "/" folder
  return @fs_to_dev[folder] if @fs_to_dev.has_key?(folder)

  components = folder.split(/\//)
  components.size.downto(0).each do |sz|
    current_folder = components[0..sz-1].join("/")
    current_folder = "/" if current_folder == ""
    return @fs_to_dev[current_folder] if @fs_to_dev.has_key?(current_folder)
  end
  raise NotMountedException.new(folder)
end