Date: Sun, 05 Oct 2008 12:03:33 +0200 From: Miroslav Lachman <000.fbsd@quip.cz> To: Ian Smith <smithi@nimnet.asn.au> Cc: jail@freebsd.org, questions@freebsd.org, Redd Vinylene <reddvinylene@gmail.com> Subject: Re: Problems moving my jails (mv: Operation not permitted) Message-ID: <48E890F5.70800@quip.cz> In-Reply-To: <20081005154926.V49572@sola.nimnet.asn.au> References: <f1019d520810041135s509ef5f4tdf9be77b4a3d8df3@mail.gmail.com> <48E7B80F.8040602@gmail.com> <f1019d520810041140t6d6cdb42w94d9696448db406f@mail.gmail.com> <f1019d520810041153p3f7d1058lcea5defdf4f44613@mail.gmail.com> <f1019d520810041156o53cb86c3ua74da1a76cf7c11a@mail.gmail.com> <18663.48601.45230.57747@almost.alerce.com> <f1019d520810041204n276a7dabvd881dab396ac512e@mail.gmail.com> <18663.49808.808955.271579@almost.alerce.com> <f1019d520810041327u1cb710ebya0b9de9fa5eaea50@mail.gmail.com> <20081005154926.V49572@sola.nimnet.asn.au>
next in thread | previous in thread | raw e-mail | index | archive | help
Ian Smith wrote:
> On Sat, 4 Oct 2008, Redd Vinylene wrote:
> > On Sat, Oct 4, 2008 at 9:22 PM, George Hartzell <hartzell@alerce.com> wrote:
> > > Redd Vinylene writes:
> > > > On Sat, Oct 4, 2008 at 9:02 PM, George Hartzell <hartzell@alerce.com> wrote:
> > > > >
> > > > > If you do an ls -lo /home/jail/box/usr/bin/chpass, you'll probably see
> > > > > the schg flag set. Man chflags for more info and instructions on how
> > > > > to unset it
> > > > >
> > > > > g.
> > > > >
> > > >
> > > > Yes:
> > > >
> > > > -r-sr-xr-x 6 root wheel schg 18468 Aug 2 19:47 /usr/jail/box/usr/bin/chpass
> > > >
> > > > So I'd simply have to "chflags noschg /usr/jail/box/usr/bin/chpass"
> > > > and then "cp /usr/jail/box/usr/bin/chpass
> > > > /home/jail/box/usr/bin/chpass"?
> > >
> > > I think that you ought to be able to cp it as is. You're just not
> > > allowed to change the original (e.g. remove it), which is why your mv
> > > and rm failed.
> > >
> > > g.
> > >
> >
> > I've been told that changing flags might seriously mess things up. Is
> > there any way to copy the remaining files from /usr/jail into
> > /home/jail, or do I have to rebuild everything from scratch?
>
> Having read the thread to date, I reckon you should:
>
> a) find(1) all schg files in your jails (was chpass the only one?)
> b) clear the schg flag on any such found as above (-R if you like)
> c) use mv as you originally intended (if they're still there :)
> d) chflags schg on all files that were originally set that way.
>
> If you do use cp instead of mv, make sure to use cp -p to preserve
> each file's owner/group/permissions/datestamp.
>
> e) make sure any and all symlinks still point to the right file/s.
>
> Personally I'd use cp -pR rather than mv in case I stuffed it up :) but
> then being perhaps overcautious I'd have started off with a 'ls -lR
> /usr/jail > listfile' (if I hadn't made a backup tar) to at least have a
> full list of what was where, with what user/perms etc ..
>
> Also read cp(1) re -R flag carefully .. if there are any hard linked
> files, as there may well be, then using tar to move these would be
> the safest bet anyway - plus you'd have a backup .. next time anyway :)
>
> Since it just failed to mv some files, you shouldn't need to rebuild if
> you can mv those files and reset their flags/permissions correctly.
Yes, there are hardlinks, so "the best" way to move all files with
preserving flags, permissions, links etc is something like this:
[copy jails by tar (or use cpio if you prefer)]
tar -cf - -C /usr/jail . | tar -xpf - -C /home/jail
[remove flags from old jail files]
chflags -R noschg /usr/jail
[remove old jail files]
rm -r /usr/jail
But it applies only in case before you use chflags -R noschg on original
files (as you post earlier - now you do not have flags anymore)
Another way is to use getfacl/setfacl or mtree to get backup of original
files permissions and restore them later.
Miroslav Lachman
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?48E890F5.70800>