Date: Mon, 2 Jul 2012 07:53:42 -0700 From: Marcel Moolenaar <marcel@xcllnt.net> To: Brooks Davis <brooks@freebsd.org> Cc: Tim Kientzle <tim@kientzle.com>, Dag-Erling Sm?rgrav <des@des.no>, freebsd-arch@freebsd.org, "Simon J. Gerraty" <sjg@juniper.net> Subject: Re: Allow user install Message-ID: <43C6B281-C2DD-429D-AE9E-24A52184C7FA@xcllnt.net> In-Reply-To: <20120702143418.GA74604@lor.one-eyed-alien.net> References: <20120626063017.D05DA58081@chaos.jnpr.net> <86wr2uwdgf.fsf@ds4.des.no> <C31B93F4-674C-4183-9F3F-5F7C48980204@kientzle.com> <20120626161605.5082A58081@chaos.jnpr.net> <20120627235945.GE243@lor.one-eyed-alien.net> <9BB38D52-3CB9-44CE-B1BD-85DFAD6A1176@xcllnt.net> <20120702143418.GA74604@lor.one-eyed-alien.net>
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On Jul 2, 2012, at 7:34 AM, Brooks Davis wrote:
> On Sun, Jul 01, 2012 at 02:12:07PM -0700, Marcel Moolenaar wrote:
>>
>> On Jun 27, 2012, at 4:59 PM, Brooks Davis wrote:
>>
>>> On Tue, Jun 26, 2012 at 09:16:05AM -0700, Simon J. Gerraty wrote:
>>>>
>>>> On Tue, 26 Jun 2012 08:18:05 -0700, Tim Kientzle writes:
>>>>> Better idea: have the build write a textual description of the
>>>>> tar entries. That description can then be fed to tar to build
>>>>> the actual tarball.
>>>>
>>>> Yes, that's what we do - manifest files that tar and other tools use to
>>>> produce the install images.
>>>>
>>>>> The description format that tar already supports is a variant
>>>>> mtree format borrowed from NetBSD. Each line specifies
>>>>> the tar entry fields (filename, owner, permissions, etc) and
>>>>> the filename where the file contents are stored.
>>>>
>>>> Yes, we've added that support to makefs - I believe it is already in
>>>> -current. There's still quite a bit to do.
>>>
>>> It's there except that makefs uses the FreeBSD mtree code which doesn't
>>> support the crucial absolute path support in NetBSD's mtree.
>>
>> ?
>>
>> I wrote the code and no, it doesn't use FreeBSD mtree code and yes,
>> it supports absolute pathnames:
>>
>> :
>> cp = strchr(pathspec, '/');
>> if (cp != NULL) {
>> /* Absolute pathname */
>> mtree_current = mtree_root;
>>
>> :
>>
>> The code should be compatible with libarchive.
>> Maybe there's a bug?
>
> On the first point, two files are used from ../mtree:
>
> $ ident makefs | grep mtree
> $FreeBSD: head/usr.sbin/makefs/mtree.c 223306 2011-06-19 18:34:49Z marcel $
> $FreeBSD: head/usr.sbin/mtree/misc.c 160083 2006-07-03 10:55:22Z maxim $
> $FreeBSD: head/usr.sbin/mtree/spec.c 229403 2012-01-03 18:51:58Z ed $
>
> Here's the failure:
>
> $ mkdir foo
> $ touch foo/bar
> $ cd foo
> $ tar cf ../foo.mtree --format mtree --options mtree:use-set .
> $ cd ..
> $ cat foo.mtree
> #mtree
> /set type=file uname=brooks uid=1001 gname=brooks gid=1001 mode=644
> . time=1341239212.0 mode=755 type=dir
> ./bar time=1341239166.0 size=0
> ./ormat time=1341239212.0 size=2048
> $ makefs -s 1m -F foo.mtree foo.img foo
> makefs: line 4: slash character in file name
>
> and the source of the failure.
>
> $ grep "slash character in file name" /usr/src/usr.sbin/mtree/*
> /usr/src/usr.sbin/mtree/spec.c: errx(1, "line %d: slash character in file name",
>
Your invocations is still based on directory scanning and with
the -F option you can provide overrides. This is not the mtree
support I added -- that eliminates directory scanning and the
-F option has no effect. Use as follows:
makefs -s 1m foo.img foo.mtree
See also man makefs
FYI,
--
Marcel Moolenaar
marcel@xcllnt.net
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