Date: Thu, 16 Jan 2014 14:36:16 -0600 From: Mark Felder <feld@FreeBSD.org> To: Tim Kientzle <tim@kientzle.com> Cc: FreeBSD current <freebsd-current@freebsd.org> Subject: Re: mtree acl support Message-ID: <1389904576.2313.71707745.52B4D2D1@webmail.messagingengine.com> In-Reply-To: <93FD368C-21D1-4A5F-986A-859D83AFB5BF@kientzle.com> References: <1389710847.2685.70601137.72B5C024@webmail.messagingengine.com> <93FD368C-21D1-4A5F-986A-859D83AFB5BF@kientzle.com>
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On Wed, Jan 15, 2014, at 23:11, Tim Kientzle wrote: > > On Jan 14, 2014, at 6:47 AM, Mark Felder <feld@freebsd.org> wrote: > > > I was recently talking to someone about how one would backup / restore > > ACLs reliably. I didn't see any mention of ACLs in the mtree man page > > and after a quick google I came upon this old mailing list post: > > > > http://lists.freebsd.org/pipermail/freebsd-hackers/2008-April/024173.html > > > > patch in list is here: http://heka.cenkes.org/sat/diffs/mtree_acl.diff > > I've mirrored it here: https://feld.me/freebsd/mtree_acl.diff > > > > This old patch appears to still apply cleanly. I hate to see a patch die > > and be forgotten. > > One problem that ‘tar’ has addressed (inspired by Joerg Schilling’s > work on star) is to permit ACLs to be restored even if the user database > is out of date. > > This is done by including a fourth field in each ACE with the > numeric user ID. > > I suspect you want to do the same for mtree. I thought > I remembered acl_to_text having an option to use > an extended text format, so it might be a trivial change. > As long as it's not default. One of the most convenient ways to change a user's UID (or multiple users!) is to do an mtree backup, change UID/GID, and then re-apply mtree backup. Every file that the user(s) previously owned will be automatically changed to the new UID/GID for you :-)help
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