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- Subject: Re: luuid vs. forks
- From: Alexander Gladysh <agladysh@...>
- Date: Mon, 8 Feb 2010 23:49:44 +0300
>> I fork a process, then call uuid:new() both in parent and in child. On
>> Ubuntu I get different results, on OS X generated UUIDs are the same.
> I'm not seeing what you think the problem is. Every UUID generated should
> be different from every other, and they look to be, and the order of
> stdout depends
> on OS scheduling.
> What about the behaviour concerns you?
Sorry for not being clear. On OS X box UUID series in parent and child processes are identical. I'll use fixed width font (sorry for HTML letter) and reorder lines in my example, so it is more apparent:
$ lua -lluarocks.require uuid-fork.lua
parent 1: DF9C3E77-1ACB-4B15-81C8-D0E3AB0A7B4B
child 1: DF9C3E77-1ACB-4B15-81C8-D0E3AB0A7B4B
parent 2: 68062AA2-721D-43FF-87D6-9007F9265C2A
child 2: 68062AA2-721D-43FF-87D6-9007F9265C2A
parent 3: 39EE9673-BE8D-4EB0-8C1D-2D22CBE94920
child 3: 39EE9673-BE8D-4EB0-8C1D-2D22CBE94920
parent 4: B895873C-B589-4944-AE16-39D811E28E5A
child 4: B895873C-B589-4944-AE16-39D811E28E5A
parent 5: DE5A1755-096B-4656-8001-F280DBB33358
child 5: DE5A1755-096B-4656-8001-F280DBB33358
This looks wrong to me. Also it (indirectly) breaks my tests. So I want to ask — is this normal, or my setup is broken?
Alexander.
