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I'm going crazy because I have what I think is a fairly straight-forward even simple need that doesn't seem to have been met by any free software. Does anyone know of any folder sync software or a way to create a batch file that synchronizes all changes to folders bi-directionally? Let me emphasize ALL CHANGES. Including deletions? Without pop-ups or user intervention? I can tell you how such as system should work, but I lack the skill (yet) to make an app to do it. It would go something like this:
A filelist.txt log is kept from synchronization to synchronization which allows the synchronizer a way to tell whether a missing file on one side means that it is a new file on the other side or a deleted file on this side.
1. Any file in either side not in the file list, copy to other side.
2. Any file missing on either side, auto-delete from other side, or, to be safe, move it to a designated "sync trash" folder.
3. Now that both sides are equal, update the file list log.
Such a system could be run maybe once every 10 minutes on a schedule to keep two computers in sync whenever they can see each other over the network. Of course, if one of the two folders isn't present, the script would end. Has anyone here done such a thing? Or know how it could be done? I'm familiar somewhat with simple batch scripts, and I make much use of third party command line tools to accomplish things, but this has eluded me and I've spent hundreds of hours looking for a solution.

Allway Sync uses a database to make comparisons, so that all changes are detected and can be propagated to either side of a synchronization. The penalty for this (in my very limited experience) is speed, but I didn't give it much of a shot - I was mostly too lazy to switch to it, but I also decided that I'd rather risk unnecessary leftovers than risk unintended deletions.

It's still officially rejected for writing to the registry, but the newer portable version fixed that, so it's now not included because it requires IE 5.5 or later and perhaps some early bugs. Discussions of its portability are in these threads:

http://www.portablefreeware.com/forums/ ... php?t=1646

http://www.portablefreeware.com/forums/ ... php?t=2022

Try DSynchronize. I think it will do what you need.

Thanks all! Also, like usual, I found a solution shortly after I asked the question: Unison, but I still needed to find out if that could be made to run in the background automatically. I'm certainly glad I asked though. m^(2)'s script looks perfect (thanks for taking time out to help; Portable Virtualbox is awesome)!. As for Dsynchronize, I love it and have used it a lot, but from what I've seen, it only handles deletes one-way, which doesn't quite do it. Allway's free version limits you to so many files per month if I remember right. I'm sure I can make something work now. Thanks for these quick responses and the help.

ashghost wrote:Allway Sync uses a database to make comparisons, so that all changes are detected and can be propagated to either side of a synchronization. The penalty for this (in my very limited experience) is speed, but I didn't give it much of a shot - I was mostly too lazy to switch to it, but I also decided that I'd rather risk unnecessary leftovers than risk unintended deletions.

It's still officially rejected for writing to the registry, but the newer portable version fixed that, so it's now not included because it requires IE 5.5 or later and perhaps some early bugs. Discussions of its portability are in these threads:

Additional utility for this matter is this file sync program. User-friendly interface, speed and efficiency.

I use a programme to file synchronization, which is called File Sync. Auto file and folder sync software is a necessary thing for everybody. That is why I use this program and haven't such problems.

Any file in either side not in the file list, copy to other side.
sonnerie portable gratuite