Date: Sun, 24 Aug 2003 11:02:23 +0200 From: Pawel Jakub Dawidek <nick@garage.freebsd.pl> To: Tim Kientzle <kientzle@acm.org> Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: Inode Operations Message-ID: <20030824090223.GW47959@garage.freebsd.pl> In-Reply-To: <3F4828F5.8090207@acm.org> References: <3F4828F5.8090207@acm.org>
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--KRJ4yArSHF8vY7I3 Content-Type: text/plain; charset=iso-8859-2 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sat, Aug 23, 2003 at 07:54:45PM -0700, Tim Kientzle wrote: +> I'm working on some archiving programs and need to (for various +> reasons) keep track of a very large number of files so that I +> can revisit them at the end of the operation. For example, +> on extract, I need to set directory access times and permissions +> after the complete extract is finished, which requires me to +> record every created directory. (No, there is no way around +> this short of re-scanning the entire archive a second +> time, which is impractical at best.) +>=20 +> Right now, I'm storing the full pathname of each such +> file, but that is taking up a lot of memory, so I'm looking +> for a more compact approach. It occurred to me that +> the device number/inode (as returned by stat(2)) is another +> way to uniquely identify a file. As it turns out, I need to +> stat() everything anyway, so collecting such identifiers is easy. +> But, I can't find any system calls that actually use this information. +>=20 +> Question: Are there any system calls that allow you to +> access/modify a file based only on the device number/inode number? Check getfh(2)/fhopen(2) syscall if you are root. --=20 Pawel Jakub Dawidek pawel@dawidek.net UNIX Systems Programmer/Administrator http://garage.freebsd.pl Am I Evil? Yes, I Am! http://cerber.sourceforge.net --KRJ4yArSHF8vY7I3 Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.7 (FreeBSD) iQCVAwUBP0h/Hz/PhmMH/Mf1AQG4pQQAnaruTo/0GKFzrwkpS4PiaQwl9dHPLTSM YHcoqqPxhyVJ5PydPi5neERV1z8Ldpng2vYQc4Zn/zzWye089TN86cpMreB/06xG +E7XldE6DiXwSSjIxbRVWUxEVtc391R4mWmVcfnJhfeFRCzYp5x2fp+ddfkBIuyt tgOlaFEuPGA= =JSDM -----END PGP SIGNATURE----- --KRJ4yArSHF8vY7I3--
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