Date: Fri, 5 Sep 2003 16:05:14 +0100 From: Matthew Seaman <m.seaman@infracaninophile.co.uk> To: Vitali Malicky <life@zone3000.net> Cc: freebsd-questions@freebsd.org Subject: Re: I need to control a bunch of files. Message-ID: <20030905150514.GC79611@happy-idiot-talk.infracaninophile.co.uk> In-Reply-To: <004201c373aa$7b67f170$2401010a@zone3000.net> References: <004201c373aa$7b67f170$2401010a@zone3000.net>
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On Fri, Sep 05, 2003 at 03:37:34PM +0300, Vitali Malicky wrote:
> There is a question, sorry if you find it stupid.
>=20
> I need to control a bunch of files.
>=20
> As soon as any of these files changes it should be immediately
> rechecked and correct chmod and chown reset on this file(s).
>=20
> Though I can do it from a simple script executed by the cron every
> five minutes or so, I'd like them to be controlled by a process which
> would monitor any possible changes in these files and would do the
> job upon the event.
>=20
> Can anybody give me a hint?
Are you any good at C programming? If so, check out the man page for
kqueue(2) -- you can register a series of kevents with the kernel, and
it will inform your process whenever one of those events occurs. One
of the standard "event filters" is EVFILT_VNODE, which will tell you
when a vnode (ie file, in this case) gets modified, including such
changes as unlinking the file, renaming it, change of attributes
(ownership, mode) etc.
Cheers,
Matthew
--=20
Dr Matthew J Seaman MA, D.Phil. 26 The Paddocks
Savill Way
PGP: http://www.infracaninophile.co.uk/pgpkey Marlow
Tel: +44 1628 476614 Bucks., SL7 1TH UK
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