Class: Sys::Sv::StatusBytes

Inherits:
Object
  • Object
show all
Defined in:
lib/sys/sv/statusbytes.rb

Overview

The StatusBytes class interprets state files maintained by a SvDir’s monitor process. It should normally not be instantiated directly.

Constant Summary collapse

BUFLEN =

:nodoc:

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TAI_EPOCH =

TODO - grok runit extended info (20 bytes)

4611686018427387914

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(bytes) ⇒ StatusBytes

:nodoc:



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# File 'lib/sys/sv/statusbytes.rb', line 19

def initialize(bytes) # :nodoc:
  if bytes.size < BUFLEN
    raise ::Errno::EPROTO.new("corrupt status buffer")
  end

  @bytes = bytes
  @pid, @pauseflag, @wantflag = @bytes.unpack('x12 V c a')
  @epoch = nil # computed if needed
end

Instance Attribute Details

#pauseflag ⇒ Object (readonly)

time_t 0 on the TAI scale



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# File 'lib/sys/sv/statusbytes.rb', line 17

def pauseflag
  @pauseflag
end

#pid ⇒ Object (readonly)

time_t 0 on the TAI scale



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# File 'lib/sys/sv/statusbytes.rb', line 17

def pid
  @pid
end

#wantflag ⇒ Object (readonly)

time_t 0 on the TAI scale



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# File 'lib/sys/sv/statusbytes.rb', line 17

def wantflag
  @wantflag
end

Instance Method Details

#elapsed ⇒ Object

Number of seconds since service was most recently started or stopped.



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# File 'lib/sys/sv/statusbytes.rb', line 31

def elapsed
  ::Time.now.to_f - epoch()
end

#epoch ⇒ Object

Returns the number of seconds since the UNIX epoch since the service was most recently started or stopped.



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# File 'lib/sys/sv/statusbytes.rb', line 37

def epoch
  return @epoch if @epoch

  # assemble UNIX-scale seconds from TAI64N label
  hi32, lo32, nano = @bytes.unpack('N N N')
  @epoch = (hi32 << 32) + lo32 - TAI_EPOCH
  if @epoch <= 0
    @epoch = 0.0
  else
    @epoch += nano / 1e9
  end

  @epoch
end