Allow user install

[Brooks Davis]

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",

-- Brooks
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