mmap/munmap with zero length

[Paul B. Mahol]

On 7/4/09, Alexander Best <alexbestms at math.uni-muenster.de> wrote:
> i'm wondering why mmap and munmap behave differently when it comes to a
> length
> argument of zero. allocating memory with mmap for a zero length file returns
> a
> valid pointer to the mapped region.

there is V flag for malloc.conf

>
> munmap however isn't able to remove a mapping with no length.
>
> wouldn't it be better to either forbid this in mmap or to allow it in
> munmap?

It wouldn't improve badly written program.

-- 
Paul