Class: ServiceStatus

Inherits:
Object
  • Object
show all
Defined in:
lib/runit-man/service_status.rb

Constant Summary collapse

STATUS_SIZE = 
20
S_DOWN =

state

0
S_RUN = 
1
S_FINISH = 
2

Instance Method Summary collapse

Constructor Details

#initialize(data) ⇒ ServiceStatus

Returns a new instance of ServiceStatus.



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# File 'lib/runit-man/service_status.rb', line 8

def initialize(data)
  # status in daemontools supervise format
  # look at runit's sv.c for details
  data = (!data.nil? && data.length == STATUS_SIZE) ? data : nil
  @raw = data.nil? ? nil : data.unpack('NNxxxxVxa1CC')
end

Instance Method Details

#down? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/runit-man/service_status.rb', line 19

def down?
  status_byte == S_DOWN
end

#finish? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/runit-man/service_status.rb', line 27

def finish?
  status_byte == S_FINISH
end

#got_term? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/runit-man/service_status.rb', line 52

def got_term?
  pid && @raw[4] != 0
end

#inactive? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/runit-man/service_status.rb', line 15

def inactive?
  @raw.nil?
end

#pid ⇒ Object 



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# File 'lib/runit-man/service_status.rb', line 31

def pid
  @pid ||= down? ? nil : @raw[2]
end

#run? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/runit-man/service_status.rb', line 23

def run?
  status_byte == S_RUN
end

#started_at ⇒ Object 



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# File 'lib/runit-man/service_status.rb', line 35

def started_at
  # from TAI to Unix
  @started_at ||= @raw ? Time.at((@raw[0] << 32) + @raw[1] - 4611686018427387914) : nil
end

#to_s ⇒ Object 



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# File 'lib/runit-man/service_status.rb', line 56

def to_s
  return 'inactive' if inactive?
  # try to mimics stat behaviour to minimize readings
  result = status_string
  result += ', got TERM' if got_term?
  result += ', want down' if want_down?
  result += ', want up' if want_up?
  result 
end

#uptime ⇒ Object 



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# File 'lib/runit-man/service_status.rb', line 40

def uptime
  @uptime ||= down? ? nil : Time.now - started_at
end

#want_down? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/runit-man/service_status.rb', line 48

def want_down?
  pid && @raw[3] == 'd'
end

#want_up? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/runit-man/service_status.rb', line 44

def want_up?
  @raw && !pid && @raw[3] == 'u'
end