Re: [GD-General] Multifile atomic updates

[Mike W. <mi...@ge...>]

i'd think that you'd have your updater application set an ini or 
registry entry indicating 'startedupdate=1' or something and then have 
some kind of launcher application that does checks of the application, 
reads this setting on every launch, if the 'startedupdate' is set, but 
not 'finishedupdate', then prompt the user to finish the update they 
started, which could check at what state the update is in, if the files 
have been downloaded locally already, the user doesn't have to do that 
step, you can md5 the files to make sure they are valid before applying 
the changes (taking into account terminated downloads) and download any 
'broken' files as necessary...

or use VISE AutoUpdate that does all this fun stuff for you ;]

mike w
www.gekidodesigns.com


Brian Hook wrote:

>Say you have a patch installer that needs to update the following 
>files:
>
>GAME.EXE
>GAME.DLL
>NETAPI.DLL
>
>The typical way would be to download the patch, apply it to temporary 
>files, then copy over the files upon completion.
>
>PATCH GAME.EXE NEWGAME.EXE
>PATCH GAME.DLL NEWGAME.DLL
>PATCH NETAPI.DLL NEWNETAPI.DLL
>
>//Assume UPDATE renames existing to .EXT.OLD
>//and copies NEW*.EXT to *.EXT
>UPDATE GAME.EXE
>UPDATE GAME.DLL
>UPDATE NETAPI.DLL
>
>Obviously nothing destructive happens until after the patches are 
>applied and you can verify that everything is okay.  But what do you 
>do if something bad happens during the destructive update portion, 
>e.g. lost connection to remote disk or power outage or system crash, 
>etc. during the update?
>
>The brute force mechanism seems a little, well, brute force, I was 
>wondering if there's something more elegant I could do.
>
>Brian
>
>
>
>
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