PROPOSAL: add tryFdSeek to unix

[Simon Marlow]

On 29/06/2011 06:44, Bryan O'Sullivan wrote:
> On Tue, Jun 28, 2011 at 5:15 PM, wren ng thornton <wren at freegeek.org
> <mailto:wren at freegeek.org>> wrote:
>
>     I'd like to propose adding a variant of fdSeek which returns errors
>     directly instead of throwing an exception.
>
>
> Why wouldn't you just wrap it in Control.Exception.try instead? And
> what's so special about seeking that suggests that it needs an alternate
> entry point?
>
> (In other words, I'm opposed to this proposal.)

Me too.  I can imagine that we might want a way to extract an Errno from 
an IO exception for users of System.Posix who really care about specific 
Errnos.

Cheers,
	Simon