'fopen' successfully opens directories

[Thomas Weber]

On 23/04/08 07:58 -0700, Sergei Steshenko wrote:
> Hello,
> 
> please see this:
> 
> "
> GNU Octave, version 3.0.1b
> [snip]
> octave:1> fid = fopen("/tmp", "r")
> fid =  3
> octave:2> fread(fid, inf, "double")
> ans = [](0x1)
> "
> 
> - I would expect failure, i.e. negative 'fid', from 'fopen' in such a case.

This behaviour is expected, see
http://www.opengroup.org/onlinepubs/009695399/functions/fopen.html
(look for EISDIR, which gives a hint that (f)opeing a directory is
considered valid, unless you want to write to it).

Whether this behavious is _useful_ is left to everyone's imagination.

	Thomas