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 1005
1005:         def self.list_trappable
1006:                 ruby_engine = defined?(RUBY_ENGINE) ? RUBY_ENGINE : "ruby"
1007:                 case ruby_engine
1008:                 when "ruby"
1009:                         result = Signal.list
1010:                         result.delete("ALRM")
1011:                         result.delete("VTALRM")
1012:                 when "jruby"
1013:                         result = Signal.list
1014:                         result.delete("QUIT")
1015:                         result.delete("ILL")
1016:                         result.delete("FPE")
1017:                         result.delete("KILL")
1018:                         result.delete("SEGV")
1019:                         result.delete("USR1")
1020:                 else
1021:                         result = Signal.list
1022:                 end
1023:                 
1024:                 # Don't touch SIGCHLD no matter what! On OS X waitpid() will
1025:                 # malfunction if SIGCHLD doesn't have a correct handler.
1026:                 result.delete("CLD")
1027:                 result.delete("CHLD")
1028:                 
1029:                 # Other stuff that we don't want to trap no matter which
1030:                 # Ruby engine.
1031:                 result.delete("STOP")
1032:                 
1033:                 return result
1034:         end

[Validate]