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On Tue, Oct 19, 2004 at 10:11:09PM +0100, David Brownlee wrote:
>=20
> 	The suggested ioctl() would allows a check for sufficent
> 	write space on a socket. At first glance the same could be
> 	done by polling with poll(). What does the ioctl() give
> 	you that a poll() on that one fd with instant timeout
> 	doesn't, other than slightly less overhead setup?

Two things:

1) The ioctl tells exactly how much space available

2) I see it as a lot less overhead. This ioctl copies out 4 bytes of data. =
=20
poll() will copy in and out more data, and go wandering through more
complicated code paths. Also, to use poll() like this seems like an abuse.

Take care,

Bill

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