const golang.org/x/sys/unix.TCSETSF2

one use

	golang.org/x/sys/unix (current package)
		zerrors_linux_amd64.go#L379: 	TCSETSF2                         = 0x402c542d

The pages are generated with Golds v0.4.9. (GOOS=linux GOARCH=amd64)