Extending sbufs with a drain

[Gordon Tetlow]

On Wed, Sep 8, 2010 at 9:29 AM, Poul-Henning Kamp <phk at phk.freebsd.dk>wrote:

> In message <AANLkTikerOYdEyT6jt7rAN3JP_N_oofq7ZXc4NptA4zP at mail.gmail.com>,
> mdf@
> FreeBSD.org writes:
> >> For one thing, sbuf is not a kernel facility, it is a general purpose
> >> string editing library which is also used outside FreeBSD.   If
> >> we add the drain facility it should work in both userland and kernel.
> >
> >Given that sys/sbuf.h is included in 100+ kernel files and 4
> >user-space files, [...]
>
> That is probably more an indication that our userland is largely
> unchanged from 1995, whereas as everybody loves to hack up the
> kernel :-)  The various people who have told me they adopted sbufs
> have been very happy with them in userland.


I would think that is more likely a result of the only documentation I see
for sbuf always refers to kernel implementation (sbuf(9), I don't see any
documentation for sbuf(3). Can you give some pointers? I've always hated
string manipulation in C, if I can find another way to do it, I'm all for
it.

Gordon