[PATCH] reimplement dirname v2

[Matthias Andree]

Am 11.09.2011 09:55, schrieb Tito:

> There are also two more problems of different behaviour
> between linux and freebsd:
> 1) freebsd dirname could return NULL on error

This is a standards conformance bug to be addressed inside FreeBSD.

FreeBSD's dirname() claims conformance to X/Open Issue 4 Rev 2, which
isn't exactly up to date.

> 2) It errors on path component to be returned larger than MAXPATHLEN
>   meanwhile linux dirname swallows happily args larger than PATH_MAX
>   (could not find MAXPATHLEN for linux so I assume it is PATH_MAX for us).

> Even if this could happen only on corner cases it could eventually interact badly
> with bb's code as we don't expect dirname to return NULL, at least the manpages
> don't mention it.

You should not need to, and note that few applications will continue to
work much longer if they've run out of memory.