Date: Fri, 14 Dec 2012 12:32:31 +0100 From: "C. P. Ghost" <cpghost@cordula.ws> To: freebsd-questions@freebsd.org Cc: Jack Mc Lauren <jack.mclauren@yahoo.com> Subject: Re: Listen to file changes Message-ID: <CADGWnjUc=r=N9TwkSrG%2BAVx0bLuRjxAuK5GCCBXwijF01yyiYQ@mail.gmail.com> In-Reply-To: <50CB08BD.2060302@qeng-ho.org> References: <1355478343.11175.YahooMailNeo@web160106.mail.bf1.yahoo.com> <20121214113457.970f6759.freebsd@edvax.de> <50CB08BD.2060302@qeng-ho.org>
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On Fri, Dec 14, 2012 at 12:08 PM, Arthur Chance <freebsd@qeng-ho.org> wrote: > On 12/14/12 10:34, Polytropon wrote: >> >> On Fri, 14 Dec 2012 01:45:43 -0800 (PST), Jack Mc Lauren wrote: >>> >>> Hi all >>> I want to monitor files access and change time. How can I >>> listen to specific file or directory to monitor ? I'm coding with c. >> >> >> If I remember correctly, what you're searching for does already >> exist: FAM - the File Alteration Monitor. It's in the ports >> collection (/usr/ports/devel/fam). There are also C++ and >> Ruby bindings, maybe you can also interface with C... >> >> For C: Maybe using readdir() et al. could be useful? Also see >> "man 5 inode", "man 5 dir" and "man 3 readdir" for more info. >> And struct ufs2_dinode in /usr/include/ufs/ufs/dinode.h should >> have the information you need to parse for; maybe also check >> the FILE type in /usr/include/stdio.h for access flags. > > See also kevent(2) and the EVFILT_VNODE system filter. Exactly. Check out how "tail -f" works in /usr/src/usr.bin/tail/forward.c -cpghost. -- Cordula's Web. http://www.cordula.ws/
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