Re: more detailed io state; new_handler and thread safety

[Matthias Weiss <matthias dot weiss at inode dot at>]

On Fri, Apr 05, 2002 at 12:47:11PM -0500, Phil Edwards wrote:
> On Fri, Apr 05, 2002 at 06:11:10PM +0100, Jonathan Wakely wrote:
> > On Fri, Apr 05, 2002 at 07:31:29PM +0200, Matthias Weiss wrote:
> > > 
> > AFAIK file permissions aren't covered in standard C or C++, as they're an
> > OS-specific feature.
> 
> Correct.
> 
> > Personally I'd use stat() in the event of a failure
> > and check the mode, uid and gid, but there are probably better ways.
> 
> Since right now we're using the system C library for I/O, you can probably
> 
>     errno = 0;
>     try to get the file;
>     if ((it didn't work) && (failbit is set))
>     {
>         check errno;
>         maybe perror();
>     }
> 
> under the reasonable assumption that the system will do something to errno
> in the case of a problem.
> 
> It's still outside the standard, though.

Right, obvious, should have occured to me earlier, sorry for that stupid question!

matthias