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Re: existing file is modified or not

by tachyon (Chancellor)
on Nov 25, 2004 at 08:37 UTC ( #410354=note: print w/replies, xml ) Need Help??

in reply to existing file is modified or not

I want to know is this the right way to find whether the existing file is modified or not ?

Only if the exact difference is of any use. Otherwise simply storing a 128 bit MD5 hash would be the typical approach as it is very economical on space.

There is lots of software that monitor change in directories. Tripwire springs to mind but there are many others. However it appears to me that you might do well to look at CVS as this does all sorts of useful stuff like versioning, *diffs*, rollback, detecting and merging changes where possible, generating conflict files otherwise...... rsync might also be an option.

It really depends on the problem you are trying to solve. But when it comes to syncronising directories of files there has been a *lot* of good work done that you may find very useful.



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[marto]: Eily you can't remote connect the physical device via USB ;)
[Corion]: Eily: Sure, that's what I do, but some things you need to do on the Android device directly, like when navigating the bootloader :-)
[Eily]: marto you just need a longer cable :P
[Corion]: marto: Yeah, but I'm somewhat wary of installing random USB drivers downloaded from , Google Drive or whatever, so Linux wins there due to there being no conflicts and me just having to edit one text file in the worst case, to add the USB vendor
[hippo]: Long USB cable FTW.
[Corion]: Eily: I've thought of that, but I don't like running long cables through the appartment because sooner or later I'll trip over it, pulling at least one device off its stand :)
[marto]: hmm, may have to patch CPAN::Meta to move from search.cpan to metacpan in the META.json/yml files
[Corion]: marto: Heh - it seems that they plan to keep the links alive for a long time. But still, I plan on moving PM to use/generate the new links
[Corion]: And I think it's better to generate links to the new world instead of keeping the older links alive by generating new versions of them ;)
[marto]: yeah, I guess it's supposed to be a permanent redirect, but better to make the move where possible

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