[m-dev.] EISDIR and file opening

[Julien Fischer]

Hi Paul,

On Wed, 31 Aug 2016, Paul Bone wrote:

> I noticed recently that, at least on my Linux system, opening with fopen() a
> directory will succeed.  Errors will be returned when you attempt to read
> from the returned file object.
>
> Should the library code check that it has not just opened a directory within
> the open code?  Rather than waiting for the caller to attempt to read from
> the file?

All three non-C backends perform the check when an attempt to open file
is made and return an error if it is a directory.  For consistency, this
should also be the (documented) behaviour of the C backends.

Julien.