File: clos1way2.awk

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gawk 1%3A4.2.1%2Bdfsg-1
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{
	# We use "&&" and not ";" so it works with Windows shells as well.
	cmd = "cat - 1>&2 && sleep 2"
	print |& cmd; close(cmd, "to")
	fflush(cmd)
	print |& cmd; print ERRNO
}