write()s and pwrite()s from multiple threads in OSX

[Jorge Chamorro]

On 24/11/2010, at 13:52, Jorge wrote:
> On 24/11/2010, at 13:24, Marc Lehmann wrote:
>> On Wed, Nov 24, 2010 at 10:46:27AM +0100, Jorge <jorge at jorgechamorro.com> wrote:
>>> You're right, I know, there's no problem with O_APPEND, nevertheless a fix for write()s to non-O_APPEND fds would be a Good Thing™ for Mac users, don't you think so ?
>> 
>> yes, thats why apple would need to get involved, as they are the only ones
>> who can fix it.
>> 
>> another thing that comes to mind is read protection - if write has these
>> issues, I bet read is similarly broken.
> 
> No, it isn't, as far as I can see.


Damn it, you're right, yes it's broken too : https://gist.github.com/713677

$ curl 'https://gist.github.com/raw/713677/206ed0924e9a0cf5a1844029d6dae0221a34bdfe/test-read-a-lot.js' > rbug.js
$ node rbug.js
->
ERROR: READ MORE THAN ONCE -> 0000
ERROR: READ MORE THAN ONCE -> 0000
ERROR: READ MORE THAN ONCE -> 0000
ERROR: READ MORE THAN ONCE -> 3894
ERROR: READ MORE THAN ONCE -> 5295
ERROR: READ MORE THAN ONCE -> 5896
ERROR: READ MORE THAN ONCE -> 5911
ERROR: READ MORE THAN ONCE -> 7739
ERROR: READ MORE THAN ONCE -> 7781
ERROR: READ MORE THAN ONCE -> 7793
ERROR: READ MORE THAN ONCE -> 7808
ERROR: READ MORE THAN ONCE -> 7823
ERROR: READ MORE THAN ONCE -> 7832
ERROR: READ MORE THAN ONCE -> 7848
ERROR: READ MORE THAN ONCE -> 8204
-- 
Jorge.