Date: Wed, 12 Nov 2003 23:52:23 +0100 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: Kirk McKusick <mckusick@beastie.mckusick.com> Cc: cvs-src@FreeBSD.org Subject: Re: cvs commit: src/bin/df df.c src/sys/kern syscalls.master vfs_bio.c vfs_cluster.c vfs_syscalls.c src/sys/sys mount.h src/sys/ufs/ffs ffs_vfsops.c Message-ID: <688.1068677543@critter.freebsd.dk> In-Reply-To: Your message of "Wed, 12 Nov 2003 14:19:58 PST." <200311122219.hACMJwaG007327@beastie.mckusick.com>
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In message <200311122219.hACMJwaG007327@beastie.mckusick.com>, Kirk McKusick wr ites: > From: "Brian F. Feldman" <green@FreeBSD.org> > Date: Wed, 12 Nov 2003 14:16:07 -0500 > Sender: owner-src-committers@FreeBSD.org > X-Loop: FreeBSD.ORG > > Does this mean someone may be free to write wrappers that block > ENOSYS, execute statfs calls, and fall back to ostatfs calls > (translating 64->32 bit values as best as possible, like the kernel > does) returning the new statfs? Obviously, this would just be to > add a safety window for the transition period and to be removed > before a -RELEASE. > > -- > Brian Fundakowski Feldman \'[ FreeBSD ]''''''''''\ > <> green@FreeBSD.org \ The Power to Serve! \ > Opinions expressed are my own. \,,,,,,,,,,,,,,,,,,,,,,\ > >The above would certainly be possible. If this were a more heavily >used interface (like say stat), it would be a useful exercise. But >I do not feel it is really necessary for statfs. However, I am not >going to object if someone wants to go through the exercise of >implementing your suggestion. Uhm, as far as I recall, calling an undefined system call gives you a signal you need to handle, before you will ever see the ENOSYS. -- 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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