Class: OsCtl::Cli::MemInfo

Inherits:
Object
  • Object
show all
Defined in:
lib/osctl/cli/meminfo.rb

Instance Method Summary collapse

Constructor Details

#initialize(file = '/proc/meminfo') ⇒ MemInfo

Returns a new instance of MemInfo.



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# File 'lib/osctl/cli/meminfo.rb', line 3

def initialize(file = '/proc/meminfo')
  @content = File.read(file)
end

Instance Method Details

#buffers ⇒ Object 



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# File 'lib/osctl/cli/meminfo.rb', line 30

def buffers
  read_param('Buffers')
end

#cached ⇒ Object 



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# File 'lib/osctl/cli/meminfo.rb', line 15

def cached
  read_param('Cached')
end

#free(without_cache = true) ⇒ Object 



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# File 'lib/osctl/cli/meminfo.rb', line 19

def free(without_cache = true)
  v = read_param('MemFree')

  if without_cache
    v + buffers + swap_cached

  else
    v
  end
end

#read_param(name) ⇒ Object (protected) 



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# File 'lib/osctl/cli/meminfo.rb', line 51

def read_param(name)
  if @content =~ /^#{Regexp.escape(name)}:\s*(\d+)\s+kB$/
    $1.to_i

  else
    nil
  end
end

#swap_cached ⇒ Object 



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# File 'lib/osctl/cli/meminfo.rb', line 42

def swap_cached
  read_param('SwapCached')
end

#swap_free ⇒ Object 



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# File 'lib/osctl/cli/meminfo.rb', line 46

def swap_free
  read_param('SwapFree')
end

#swap_total ⇒ Object 



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# File 'lib/osctl/cli/meminfo.rb', line 34

def swap_total
  read_param('SwapTotal')
end

#swap_used ⇒ Object 



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# File 'lib/osctl/cli/meminfo.rb', line 38

def swap_used
  swap_total - swap_free
end

#total ⇒ Object 



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# File 'lib/osctl/cli/meminfo.rb', line 7

def total
  read_param('MemTotal')
end

#used(without_cache = true) ⇒ Object 



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# File 'lib/osctl/cli/meminfo.rb', line 11

def used(without_cache = true)
  total - free(without_cache)
end