Date: Mon, 12 Sep 2016 07:12:48 +0000 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: Matthias Andree <mandree@FreeBSD.org> Cc: freebsd-hackers@freebsd.org Subject: Re: User-space API to inquire block alignment requirements for open file descriptor? Message-ID: <20586.1473664368@critter.freebsd.dk> In-Reply-To: <c9063edd-a3c1-fce4-483c-a192addc6b86@FreeBSD.org> References: <c9063edd-a3c1-fce4-483c-a192addc6b86@FreeBSD.org>
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-------- In message <c9063edd-a3c1-fce4-483c-a192addc6b86@FreeBSD.org>, Matthias An= dree = writes: >Greetings, > >given an open file descriptor, do we have a system interface to inquire >about the block size of the underlying devices? In the past, we used to >deal with 512-byte blocks, but how about drives using 4096-byte blocks? DIOCGSECTORSIZE in sys/disk.h -- = Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe = Never attribute to malice what can adequately be explained by incompetence= .
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