At 13:55 30/11/2014 +0100, Jaroslaw Staniek wrote:
Google for "acrobat reader file locking" and you'd notice that this unnecessary locking is inherent issue of Windows. You're dealing with behavior largely inherited from the MS DOS era. You can pick other pdf reader.

Surely that evidence falsifies your claim? If it's possible for another reader under the same operating system not to lock the file, then the locking cannot be a property of the operating system, still less of its legacy? In fact, it cannot be: just look at Windows' Notepad, which does not lock files it opens.

I'm no expert, but I know that it is possible to edit some aspects of a PDF document in Adobe Reader (not "Acrobat"), providing this has been enabled by the document's author. http://www.adobe.com/uk/products/reader.html says Adobe Reader is capable of "viewing, printing, and *annotating* PDF documents" (my emphasis). Is that why Adobe Reader opts to lock the file, not knowing when you open the document whether you intend to do this?

If you ask about Linux, it was solved *properly* years ago. If you're a pro you can try e.g. Okular reader which reloads the pdf automatically and never locks.

Again, we should not be talking operating systems here. All you do by changing to Linux is to prevent yourself using Adobe Reader, which is not available for that system. If your chosen reader does not provide the annotating capabilities of Adobe Reader, it may indeed have no reason to lock a displayed PDF document. This may well suit your purposes better.

Why would it in a modern multiuser Internet-enabled environment?

When the product is capable of some modification to the file, in order to preclude update races?

Brian Barker

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