Why not remove UNIX domain socket before bind

Alexey Ivanov savetherbtz at gmail.com
Thu Dec 1 09:20:43 UTC 2016


Why not just use `flock(2)` there?

> On Nov 30, 2016, at 6:57 AM, Maxim Dounin <mdounin at mdounin.ru> wrote:
> 
> Hello!
> 
> On Tue, Nov 29, 2016 at 01:30:25PM -0800, Shuxin Yang wrote:
> 
>>     Is there any reason not to delete UNIX domain socket before bind?
> 
> To name a few, deleting a socket implies that:
> 
> a) any file can be accidentally deleted due to a typo in the
>   listen directive;
> 
> b) attempts to do duplicate listen are not detected and silently
>   break service, e.g., if you start duplicate instance of nginx.
> 
> Instead we delete the socket after closing it.
> 
> --
> Maxim Dounin
> http://nginx.org/
> 
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> nginx-devel at nginx.org
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