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Bug #4680 » copy_stream_false_select.rb

normalperson (Eric Wong), 05/13/2011 05:45 AM

 
require "socket"
require "tempfile"
require "io/nonblock"
a, b = UNIXSocket.pair
b.nonblock = true
Tempfile.open("copy_stream_test") do |tmp|
IO.copy_stream("/dev/zero", tmp.to_io, 1024 * 1024 * 30)
tmp.flush
tmp.rewind

# maxes out CPU because we select() on tmp.fileno which always
# returns true, and sendfile() always hits EAGAIN because we
# only select() b.fileno for readability (not writability)
nr = IO.copy_stream(tmp.to_io, b)
end
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