[Mongrel-development] [PATCH] always set FD_CLOEXEC on sockets post-accept()

Luis Lavena luislavena at gmail.com
Wed Jul 15 19:13:40 EDT 2009


On Wed, Jul 15, 2009 at 1:31 PM, Evan Weaver<evan at cloudbur.st> wrote:
> Luis, is this one of the commits you already accepted for 1.1.6 and friends?
>

I think is not.

Will review, but everything will be reflected in the history file.

> Evan
>
> On Thu, Jul 9, 2009 at 2:56 AM, Eric Wong<normalperson at yhbt.net> wrote:
>> FD_CLOEXEC is not guaranteed to be inherited by the accept()-ed
>> descriptors even if the listener socket has this set.  This can
>> be a problem with applications that fork+exec long running
>> background processes and our client expects us to close
>> a connection to signal a completed response: the connection
>> would only be closed when the background process closed it
>> (when it exited), not when Mongrel closes the socket.
>>
>> This issue was discovered with a server other than Mongrel but
>> the issue here is applicable to Mongrel as well.
>> ---
>>
>>  This patch was based on the below branch
>>  (against c365ba16d12a14bdf1cc50a26f67dd3b45f5a4d8)
>>
>>  > I used git-svn and added it to
>>  > http://github.com/fauna/mongrel/tree/trunk_from_svn, where it can lie
>>  > unchanged for reference.
>>
>>  P.S.: I know I used to have a commit bit to the Mongrel SVN but I
>>  never really cared for it since I've always preferred the
>>  mailing-patches-around-for-review form of development.  Let me know if
>>  pushing things to git://git.bogomips.org/mongrel.git for you to
>>  pull is preferable in the future.
>>
>>  P.P.S: not sure if it's common around here, but I've long had mutt
>>  setup to pipe messages to "git am" directly from the index or pager
>>  and also diff syntax hilighting in the mutt pager.  It all makes patch
>>  review/testing *much* nicer without having to context switch out of a
>>  terminal/screen.
>>
>>  lib/mongrel.rb |    6 +++++-
>>  1 files changed, 5 insertions(+), 1 deletions(-)
>>
>> diff --git a/lib/mongrel.rb b/lib/mongrel.rb
>> index f09a617..0619abe 100644
>> --- a/lib/mongrel.rb
>> +++ b/lib/mongrel.rb
>> @@ -278,7 +278,11 @@ module Mongrel
>>               if defined?($tcp_cork_opts) and $tcp_cork_opts
>>                 client.setsockopt(*$tcp_cork_opts) rescue nil
>>               end
>> -
>> +
>> +              if defined?(Fcntl::FD_CLOEXEC)
>> +                client.fcntl(Fcntl::F_SETFD, Fcntl::FD_CLOEXEC)
>> +              end
>> +
>>               worker_list = @workers.list
>>
>>               if worker_list.length >= @num_processors
>> --
>> Eric Wong
>> _______________________________________________
>> Mongrel-development mailing list
>> Mongrel-development at rubyforge.org
>> http://rubyforge.org/mailman/listinfo/mongrel-development
>>
>
>
>
> --
> Evan Weaver
> _______________________________________________
> Mongrel-development mailing list
> Mongrel-development at rubyforge.org
> http://rubyforge.org/mailman/listinfo/mongrel-development
>



-- 
Luis Lavena
AREA 17
-
Perfection in design is achieved not when there is nothing more to add,
but rather when there is nothing more to take away.
Antoine de Saint-Exupéry


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