[MLton] MLton.TextIO.mkstemps

[Stephen Weeks]

> Where is the source to mkstemps?  The one in
> basis-library/mlton/io.fun 

That's the right place.

> seems to use only the O_WRONLY flag instead of also including the
> O_CREAT and O_EXCL.

Here's the call:

  createf (name, O_WRONLY, O.flags [O.excl],
           let open S
           in flags [irusr, iwusr]
           end)

I see O_WRONLY and O.excl (surely O_EXCL), and Posix.FileSys.createf
automatically includes O_CREAT.