open() on a directory is not supported

[tadziopazur]

In TizenRT there is no notion of a dirfd.
open(path_to_directory, _, _) returns -1 with errno set to EISDIR.

POSIX (POSIX.1-2008) mandates that open works on directories, returning a descriptor suitable for
directory streaming operations (fstatat, openat, [un]linkat, readlinkat, renameat and the like).

Is TizenRT interested in having this functionality (open on directories) provided?
We (IoT.js) could use this functionality, since some tests require that a directory can be open'ed and resulting fd be able to be stat'ed.

@sunghan-chang Would you please voice your opinion on this one?

[pholat]

@tadziopazur Does your catalog have '/' at the end of the path? It's perfectly legit and praiseworthy on Linux, but it was the issue in my case when I tried opening/creating catalogs.

Though my errno was different - ENXIO I believe.