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begin
# If rubygems is present, keep it out of the way when loading fiddle,
# otherwise if fiddle is not installed then rubygems will load all
# gemspecs in its (futile) search for fiddle, which is slow.
if respond_to?(:gem_original_require, true)
gem_original_require 'fiddle'
else
require 'fiddle'
end
rescue LoadError
end
module Spring
module SID
def self.fiddle_func
@fiddle_func ||= Fiddle::Function.new(
DL::Handle::DEFAULT['getsid'],
[Fiddle::TYPE_INT],
Fiddle::TYPE_INT
)
end
def self.sid
@sid ||= begin
if Process.respond_to?(:getsid)
# Ruby 2
Process.getsid
elsif defined?(Fiddle) and defined?(DL)
# Ruby 1.9.3 compiled with libffi support
fiddle_func.call(0)
else
# last resort: shell out
`ps -p #{Process.pid} -o sess=`.to_i
end
end
end
def self.pgid
Process.getpgid(sid)
end
end
end
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