Re: Do we break POSIX?

[Thorsten Kukuk <kukuk@suse.de>]

On Mon, Nov 10, Tom wrote:

> One point brought up by Theo DeRaadt during PacSec was that according
> to POSIX, write operations can not return a permission denied error.
> 
> I could not argue with him on that because I have not actually read the
> POSIX standard, but he has a valid point in that breaking standards
> would be a big no.
> 
> Does anyone know immediately if this is so and if we are indeed
> breaking POSIX? If nobody can answer that, I will find out myself, as
> I've promised him to check.

The write( ) function may fail if:
[EACCES]            A write was attempted on a socket and the calling
                    process does not have appropriate privileges.

POSIX says nothing about files, but for sockets, EACCES is a valid
error code.

  Thorsten

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Thorsten Kukuk       http://www.suse.de/~kukuk/        kukuk@suse.de
SuSE Linux AG        Deutschherrnstr. 15-19        D-90429 Nuernberg
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