Date: Fri, 18 Apr 2014 09:38:46 -0700 From: David Wolfskill <david@catwhisker.org> To: Sergey Matveychuk <sem@semmy.ru> Cc: hackers@freebsd.org Subject: Re: statfs(2) Message-ID: <20140418163846.GF38950@albert.catwhisker.org> In-Reply-To: <53514ED2.2060904@semmy.ru> References: <53514ED2.2060904@semmy.ru>
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On Fri, Apr 18, 2014 at 08:12:02PM +0400, Sergey Matveychuk wrote:
> Hi.
>=20
> Tell me please, why f_bfree is unsigned and f_bavail is signed?
>=20
> struct statfs {
> ...
> uint64_t f_bfree; /* free blocks in filesystem */
> int64_t f_bavail; /* free blocks avail to non-superuser */
> ...
> ...
f_bavail can be negative. f_bfree cannot.
If f_bavail were "free blocks avail" (that is, without the "to
non-superuser" qualification), then it would always be non-negative too.
But it's not.
Peace,
david
--=20
David H. Wolfskill david@catwhisker.org
Taliban: Evil cowards with guns afraid of truth from a 14-year old girl.
See http://www.catwhisker.org/~david/publickey.gpg for my public key.
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