[Mono-dev] Unix.Native

[Miguel de Icaza]

I added support for this on master.

That said, there is an issue that I think will bite us.

Currently the fcntl P/Invoke declaration uses a "long" as a general purpose
way of passing flags to fcntl, and I suspect the parameter to F_NOCACHE
should be an int.

Thoughts?

Miguel

On Mon, Jan 12, 2015 at 7:28 PM, Greg Young <gregoryyoung1 at gmail.com> wrote:

> I have been trying to set F_NOCACHE via fcntl on a mac to no avail.
>
>                  r = Syscall.fcntl
> (handle.DangerousGetHandle().ToInt32(), (FcntlCommand) MAC_F_NOCACHE,
> 1);
>                  } while (UnixMarshal.ShouldRetrySyscall ((int) r));
>                  if (r == -1)
>                      UnixMarshal.ThrowExceptionForLastError ();
>
> (EINVAL)
>
> I have tried
> 48
> 0x400
> and 0x40000
> for F_NOCACHE though from
>
> https://github.com/realthunder/mac-headers/blob/master/usr/include/sys/fcntl.h#L256
>
> Given FcntlCommandFlags does not expose F_NOCACHE but it still should
> be fine to jam the value into the enum
>
> Has anyone set this before? Chances of finding this on google are
> slightly better than 0 :)
>
> Cheers,
>
> Greg
> --
> Studying for the Turing test
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