I was looking for some data relating to an old zone we long since decommissioned, and I didn’t want to have to start rummaging through the fire safe for tapes. We had some old flar archives lying about from roughly the time I was looking for, so I thought I’d see if what I wanted was in any of those.
Sun don’t give you anything so convenient as
flar -x, so I
had to do a bit of digging. Here’s the recipe.
$ flar info cs-dev-01-2007-10-01.flar archive_id=19b06a4bfe0b7e7200b8e1329adf06a1 files_archived_method=cpio creation_date=20071001171819 creation_master=cs-dev-01 content_name=image created Mon Oct 1 18:18:19 BST 2007 creation_node=cs-dev-01 creation_hardware_class=sun4v creation_platform=SUNW,Sun-Fire-T200 creation_processor=sparc creation_release=5.10 creation_os_name=SunOS creation_os_version=Generic_120011-14 files_compressed_method=compress content_author=take_flar.sh script content_architectures=sun4v
Right, that’s handy. It tells me that my flar archive is a pretty much a
man flar tells me that the
sub-command will split the flar into sections, one of which is something
called the “cookie”. Sounds likely that one of those sections will be
that cpio archive. Let’s give it a go. The man page also tells me
flar to split its files into the named directory.
$ mkdir -p recovery/root $ flar split -d recovery cs-dev-01-2007-10-01.flar $ ls -l recovery -rw-r--r-- 1 root root 165880915 Sep 22 15:21 archive -rw-r--r-- 1 root root 18 Sep 22 15:21 cookie -rw-r--r-- 1 root root 487 Sep 22 15:21 identification drwxr-xr-x 2 root root 2 Sep 22 15:21 root
It’s pretty plain which one we’re after, so let’s extract it. I’m after
quite a bit of stuff, so I think I’ll just dump the whole archive. I’m on a
nice fast 3510 with space to burn, after all. Remember,
flar info told us
the archive was compressed.
$ cd recovery $ file archive archive: compressed data block compressed 16 bits $ cd root $ uncompress < ../archive | cpio -id
The last command is written that way because
uncompress expects its input
to be called
something.Z, so rather than rename the file, we’ll just feed
Punchline: after all that, what I wanted wasn’t in the flar.