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Re: [Libguestfs] guestfs-examples



Hi,
Sorry for the late reply. Yes, I want to display the checksums of files in /boot which have been modified within the last 10 minutes, and I want to do that in C. Thank you very much for pointing me to the right direction, and thank you for always be so helpful.

Best regards,
Wahid


On Tue, Mar 5, 2013 at 6:25 PM, Richard W.M. Jones <rjones redhat com> wrote:
On Tue, Mar 05, 2013 at 05:04:05PM +0100, Khan Ferdous Wahid wrote:
> I have upgraded my kernel as you mentioned and everything is fine
> now. I wrote the following code to check the integrity of /boot
> directory in guest image. Now my question is- how could I check the
> integrity of files that are modified in last 10 minutes inside /boot
> directory? I use boot directory as an example directory.

AIUI you want to display the checksums of files in /boot which have
been modified within the last 10 minutes?  Recursively or just to
/boot directory without subdirectories?

The easiest way is:

  virt-ls -lR -a disk --checksum --time-relative /boot | awk '$6 <= 10*60'

If you want to do that in C instead of using virt-ls, then take a look
at the source of virt-ls -- it is written in C.  A good place to start
would be here:

  https://github.com/libguestfs/libguestfs/blob/master/cat/virt-ls.c#L443

especially the functions 'visit', 'show_file' and 'do_ls_lR'.

I would caution you that the 'visit' function shown above would have
trouble with very large directories *if* using libguestfs < 1.20.
These bugs were fixed in libguestfs 1.20 and above.

Rich.

--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
virt-p2v converts physical machines to virtual machines.  Boot with a
live CD or over the network (PXE) and turn machines into KVM guests.
http://libguestfs.org/virt-v2v


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