Class: Freud::Pidfile

Inherits:
Object
  • Object
show all
Includes:
Logging
Defined in:
lib/freud/pidfile.rb

Instance Method Summary collapse

Methods included from Logging

#exit, log_to, logger, #logger

Constructor Details

#initialize(path) ⇒ Pidfile

Returns a new instance of Pidfile.



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# File 'lib/freud/pidfile.rb', line 7

def initialize(path)
    @path = path
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/freud/pidfile.rb', line 27

def ==(other)
    File.expand_path(to_s) == File.expand_path(other.to_s)
end

#kill(signal) ⇒ Object 



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# File 'lib/freud/pidfile.rb', line 31

def kill(signal)
    pid = read
    return(self) unless pid
    Process.kill(signal, pid)
    self
end

#read ⇒ Object 



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# File 'lib/freud/pidfile.rb', line 16

def read
    return unless @path
    return unless (File.exists?(@path) and File.readable?(@path))
    output = File.read(@path)
    output ? output.to_i : nil
end

#running? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/freud/pidfile.rb', line 38

def running?
    begin
        kill(0)
        true
    rescue Errno::ESRCH
        false
    rescue Errno::EPERM
        true
    end
end

#to_s ⇒ Object 



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# File 'lib/freud/pidfile.rb', line 23

def to_s
    @path
end

#write(pid) ⇒ Object 



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# File 'lib/freud/pidfile.rb', line 11

def write(pid)
    File.open(@path, "w") { |f| f.write(pid.to_s) }
    self
end