[Bug 31237] libfaketime: integrate with libfaketime to allow running a program with a fake system time

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=31237

--- Comment #3 from alister.hood at gmail.com 2012-07-18 20:18:04 CDT ---
(In reply to comment #1)
> To do it right you'd need to ensure that all processes running under the same
> wineserver see the same time, so even tracking child processes wouldn't be
> sufficient. It would need a convincing use case to be worth the effort.

So that sounds like you would be open to patches, anyway.  Is that right?

Is there any guidance on what might make a "convincing use case"?
There are a lot of use cases, but they do tend to be pretty niche.
Another example is for testing a program e.g. to see if it handles expired
certificates correctly, or if it works correctly on a leap day.

BTW I've just been reminded that as well as faketime, there is an alternative
called datefudge, although last I heard it was missing some of the
functionality of datetime.  I'll need to test the datefudge executable with
Wine on the weekend, but I imagine it will have similar issues.

(In reply to comment #2)
> You could use RunAsDate: http://www.nirsoft.net/utils/run_as_date.html
> 
> works in wine, since 1.3.30: http://bugs.winehq.org/show_bug.cgi?id=19975

There are cases where RunAsDate doesn't work, and I suspect that a faketime
implementation in Wine would not have the same limitations (But I don't really
know how Wine works, so I can't say for sure).

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