Bug #11852 ยป patch-test-ruby-test_io.rb.diff
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args = ['-e', '$>.write($<.read)'] if args.empty?
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ruby = EnvUtil.rubybin
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opts = {}
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opts[:rlimit_nproc] = 1024 if defined?(Process::RLIMIT_NPROC)
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if defined?(Process::RLIMIT_NPROC)
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lim = Process.getrlimit(Process::RLIMIT_NPROC)[1]
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opts[:rlimit_nproc] = [lim, 1024].min
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end
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f = IO.popen([ruby] + args, 'r+', opts)
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pid = f.pid
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yield(f)
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