net: handle hangup in read on Plan 9
On Plan 9, when closing a TCP connection, we write the "hangup" string to the TCP ctl file. The next read on the TCP data file will return an error like "/net/tcp/18/data: Hangup", while in Go, we expect to return io.EOF. This change makes Read to return io.EOF when an error string containing "Hangup" is returned. Change-Id: I3f71ed543704190b441cac4787488a77f46d88a1 Reviewed-on: https://go-review.googlesource.com/22149Reviewed-by:Brad Fitzpatrick <bradfitz@golang.org> Run-TryBot: David du Colombier <0intro@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
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