Re: tail is reading already rotated file.

[Pádraig Brady]

On 05/02/15 00:45, Bernhard Voelker wrote:
> On 02/04/2015 11:09 AM, 최종우 wrote:
>> To reproduce the problem, you can run this script. It exhausted inotify 
>> watches. (in order to get the result more
>> quickly, decrease the value of max_user_watches.)
>>
>> let count=0; echo $count>>a.log; ./tail -F a.log & while true; do mv a.log 
>> a.log.$count; let count=count+1; echo
>> $count>>a.log; done
> 
> The following incomplete quick-shot patch releases the old inotify
> resource, and reverts to polling if tail really hits ENOSPC (rather
> than a strange "no space left on device" message).
> Not tested much - at least it passes the existing tests.
> Currently, I've no idea how to test that properly.

I've a test and more complete patch here which I'll send tomorrow.

> I've not looked closer at the other tail bug reported yesterday;
> does that interfere with this one?

Not really.  I'm testing a patch for that too.

thanks,
Pádraig.