From owner-freebsd-hackers@freebsd.org Wed Aug 23 06:49:57 2017 Return-Path: Delivered-To: freebsd-hackers@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 98D12DDFEE5 for ; Wed, 23 Aug 2017 06:49:57 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from kib.kiev.ua (kib.kiev.ua [IPv6:2001:470:d5e7:1::1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 1EC0A649EE for ; Wed, 23 Aug 2017 06:49:56 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from tom.home (kib@localhost [127.0.0.1]) by kib.kiev.ua (8.15.2/8.15.2) with ESMTPS id v7N6nprk057293 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Wed, 23 Aug 2017 09:49:52 +0300 (EEST) (envelope-from kostikbel@gmail.com) DKIM-Filter: OpenDKIM Filter v2.10.3 kib.kiev.ua v7N6nprk057293 Received: (from kostik@localhost) by tom.home (8.15.2/8.15.2/Submit) id v7N6nou6057292; Wed, 23 Aug 2017 09:49:50 +0300 (EEST) (envelope-from kostikbel@gmail.com) X-Authentication-Warning: tom.home: kostik set sender to kostikbel@gmail.com using -f Date: Wed, 23 Aug 2017 09:49:50 +0300 From: Konstantin Belousov To: Yuri Cc: Freebsd hackers list Subject: Re: How can the shared memory object be undeletable when all shared memory segments belong to the same user? Message-ID: <20170823064950.GM1700@kib.kiev.ua> References: <20170812090308.GH1700@kib.kiev.ua> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.8.3 (2017-05-23) X-Spam-Status: No, score=-2.0 required=5.0 tests=ALL_TRUSTED,BAYES_00, DKIM_ADSP_CUSTOM_MED,FREEMAIL_FROM,NML_ADSP_CUSTOM_MED autolearn=no autolearn_force=no version=3.4.1 X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on tom.home X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 23 Aug 2017 06:49:57 -0000 On Tue, Aug 22, 2017 at 06:10:14PM -0700, Yuri wrote: > On 08/12/17 02:03, Konstantin Belousov wrote: > >> Only renaming of the shared memory object in the code or reboot helped. > > Root should be able to unlink it. > > > Isn't shared memory supposed to be deleted when the last app that used > it quits, gracefully or not? Yes for anonymous, no for named.