Module Signal
In: lib/phusion_passenger/utils.rb

Methods

list_trappable  

Public Class methods

list_trappable()

Like Signal.list, but only returns signals that we can actually trap.

[Source]

      # File lib/phusion_passenger/utils.rb, line 1013
1013:         def self.list_trappable
1014:                 ruby_engine = defined?(RUBY_ENGINE) ? RUBY_ENGINE : "ruby"
1015:                 case ruby_engine
1016:                 when "ruby"
1017:                         result = Signal.list
1018:                         result.delete("ALRM")
1019:                         result.delete("VTALRM")
1020:                 when "jruby"
1021:                         result = Signal.list
1022:                         result.delete("QUIT")
1023:                         result.delete("ILL")
1024:                         result.delete("FPE")
1025:                         result.delete("KILL")
1026:                         result.delete("SEGV")
1027:                         result.delete("USR1")
1028:                 else
1029:                         result = Signal.list
1030:                 end
1031:                 
1032:                 # Don't touch SIGCHLD no matter what! On OS X waitpid() will
1033:                 # malfunction if SIGCHLD doesn't have a correct handler.
1034:                 result.delete("CLD")
1035:                 result.delete("CHLD")
1036:                 
1037:                 # Other stuff that we don't want to trap no matter which
1038:                 # Ruby engine.
1039:                 result.delete("STOP")
1040:                 
1041:                 return result
1042:         end

[Validate]