Module: Itsi::SignalTrap

Defined in:
lib/itsi/server/signal_trap.rb

Overview

This trap is necessary for debuggers and similar which intercept certain signals then attempt to restore these to the previous signal when finished. If the previous signal handler was registered in native code, this restoration doesn’t work as expected and the native signal handler is lost. We intercept restored signals here and reinstate the Itsi server signal handlers (if the server is still running).

Constant Summary collapse

DEFAULT_SIGNALS = 
["DEFAULT", "", nil].freeze
INTERCEPTED_SIGNALS = 
["INT"].freeze

Instance Method Summary collapse

Instance Method Details

#server_running? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/itsi/server/signal_trap.rb', line 21

def server_running?
  Itsi::Server.respond_to?(:running?) && Itsi::Server.running?
end

#trap(signal, *args, &block) ⇒ Object 



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# File 'lib/itsi/server/signal_trap.rb', line 12

def trap(signal, *args, &block)
  unless INTERCEPTED_SIGNALS.include?(signal.to_s) && block.nil? && server_running?
    return super(signal, *args, &block)
  end

  Itsi::Server.reset_signal_handlers
  nil
end