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Versions: 49
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Contents
class ServiceStatus
STATUS_SIZE = 20
# state
S_DOWN = 0
S_RUN = 1
S_FINISH = 2
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
def inactive?
@raw.nil?
end
def down?
status_byte == S_DOWN
end
def run?
status_byte == S_RUN
end
def finish?
status_byte == S_FINISH
end
def pid
@pid ||= down? ? nil : @raw[2]
end
def started_at
# from TAI to Unix
@started_at ||= @raw ? Time.at((@raw[0] << 32) + @raw[1] - 4611686018427387914) : nil
end
def uptime
@uptime ||= down? ? nil : Time.now - started_at
end
def want_up?
@raw && !pid && @raw[3] == 'u'
end
def want_down?
pid && @raw[3] == 'd'
end
def got_term?
pid && @raw[4] != 0
end
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
private
def status_byte
@status_byte ||= @raw ? @raw[5] : 0
end
def status_string
case status_byte
when S_DOWN then 'down'
when S_RUN then 'run'
when S_FINISH then 'finish'
end
end
end
Version data entries
49 entries across 49 versions & 1 rubygems