topic Re: how roll back the installed patch in Operating System - HP-UX

how roll back the installed patch

sislove — Mon, 24 Nov 2003 03:57:22 GMT

Hi wizards

I have packaged a patch using swpackage and created a depot.
i have installed that patch(depot) using swinstall.
now can anybody tell how to rollback the patch and how to take the back up of the old binaries when packaging the patch software.

Note -> the patch depot is created by me using swpackage, now i don't how to put a script so the i can also have roll back of the patch

can anybody tell how to take a backup of the old binaries when installing patch.

cheers !!
sislove

R&D is what I'm doing when I don't know what I'm doing.
-- Wernher von Braun

Re: how roll back the installed patch

Todd McDaniel_1 — Mon, 24 Nov 2003 12:31:52 GMT

Your post is a bit confusing. Are you merely trying to remove the depot you created? OR are you trying to remove the patch? and go back to the previous version?

If you are trying to remove a patch simply reboot to the previous kernel, vmunix.prev.

Removal of the depot is a simple matter of rm on the depot.

If I am offbase post again and explain further.

Re: how roll back the installed patch

Steven E. Protter — Mon, 24 Nov 2003 12:36:08 GMT

SDUX is a patch management system. If you install patch b which supersedes patch a, the binaries will be preserved.

If you subsequently remove patch b, patch a will be active, unless you've run the cleanup command and committed your patches.

swremove will remove the patches. When you create your own depots this merely assists in installation, the patches are installed by the Patch ID.

To remove your depot, remove the components either one at a time or with swremove -i

SEP

Re: how roll back the installed patch

sislove — Mon, 24 Nov 2003 22:53:24 GMT

Hi Protter and Todd,

what i have done is created a depot using swpackage for patch software.

Now i want to know whether i have to put a unconfigure scrift while packaging.

Tell me what swremove will do, whether it will excecute the unconfigure scrift to unconfigure the software or something else

with cheers
sislove

Re: how roll back the installed patch

Jean-Louis Phelix — Tue, 25 Nov 2003 03:22:25 GMT

Hi,

SEP is right. SD is a patch management system and will care about preserving old binaries and restoring them when swremoving patches (except if explicitly told not do it). Concerning scripts, they will be executed at required time (pre-installation, configuration, ...) only if they exist, but if you don't NEED them, forget them ...

Regards.

Re: how roll back the installed patch

doug hosking — Tue, 25 Nov 2003 06:18:49 GMT

swremove is definitely the cleanest way to remove patches.

Look in /var/adm/sw/save to see how old
versions of the patched files are saved by
swinstall and restored by swremove. See
the 'patch_save_files' section of the swinstall manual page.

Todd, keep in mind that patches can affect many things other than the kernel. Although
vmunix.prev can be helpful in emergency recovery from a bad kernel patch install, it is only one step in the recovery process, and may not be relevant at all for removal of things like commands patches. If you don't actually remove the patch, as opposed to just deleting a bad vmunix file, the next time you rebuild a kernel (such as when changing some kernel tunable parameters) you would be back to the original problem, because the kernel will be rebuilt using the components you thought you had previously removed. swremove is intended to be smart enough to clean up from these conditions.

Re: how roll back the installed patch

Jacko_3 — Tue, 25 Nov 2003 20:29:49 GMT

Hi there..

if you have applied a newer patch on top of a superseded patch, to roll back to a previous state you only require to swremove the patch you just installed.

once you remove the patch you installed, and "if" you have previous/older version of the patch installed then your system will automatically roll back to that previous version.

Before swremove you could create a backup of your patch binaries using this command:
# cp -rp /var/adm/sw/save/PHKL_xxxxx /tmp/PKHL_xxxxx

Hope the above help.

cheers...