From nobody Sun Dec 5 18:54:36 2021 X-Original-To: freebsd-hackers@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 308DF18C034E for ; Sun, 5 Dec 2021 18:54:46 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from kib.kiev.ua (kib.kiev.ua [IPv6:2001:470:d5e7:1::1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4J6bMn5mSHz4lQ7 for ; Sun, 5 Dec 2021 18:54:45 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from tom.home (kib@localhost [127.0.0.1]) by kib.kiev.ua (8.16.1/8.16.1) with ESMTPS id 1B5IsbkX018356 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO); Sun, 5 Dec 2021 20:54:41 +0200 (EET) (envelope-from kostikbel@gmail.com) DKIM-Filter: OpenDKIM Filter v2.10.3 kib.kiev.ua 1B5IsbkX018356 Received: (from kostik@localhost) by tom.home (8.16.1/8.16.1/Submit) id 1B5IsaIv018354; Sun, 5 Dec 2021 20:54:36 +0200 (EET) (envelope-from kostikbel@gmail.com) X-Authentication-Warning: tom.home: kostik set sender to kostikbel@gmail.com using -f Date: Sun, 5 Dec 2021 20:54:36 +0200 From: Konstantin Belousov To: Yuri Cc: Mateusz Guzik , Freebsd hackers list Subject: Re: Is it possible to determine the open file path based on the file descriptor? Message-ID: References: <21b0280d-c290-f27f-98a9-0c2242380718@rawbw.com> <5a00f93e-21a1-47ab-6e8e-15d24840c525@rawbw.com> <20200708175300.GA2866@kib.kiev.ua> <656bf089-bcc9-748a-6db2-52f3707e863c@rawbw.com> List-Id: Technical discussions relating to FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-hackers List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-hackers@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <656bf089-bcc9-748a-6db2-52f3707e863c@rawbw.com> X-Spam-Status: No, score=-1.0 required=5.0 tests=ALL_TRUSTED,BAYES_00, DKIM_ADSP_CUSTOM_MED,FORGED_GMAIL_RCVD,FREEMAIL_FROM, NML_ADSP_CUSTOM_MED autolearn=no autolearn_force=no version=3.4.5 X-Spam-Checker-Version: SpamAssassin 3.4.5 (2021-03-20) on tom.home X-Rspamd-Queue-Id: 4J6bMn5mSHz4lQ7 X-Spamd-Bar: ---- Authentication-Results: mx1.freebsd.org; none X-Spamd-Result: default: False [-4.00 / 15.00]; REPLY(-4.00)[] X-ThisMailContainsUnwantedMimeParts: N On Sun, Dec 05, 2021 at 09:53:23AM -0800, Yuri wrote: > On 7/8/20 10:53, Konstantin Belousov wrote: > > I think an immediately useful addition would be a sysctl or fcntl that > > return struct kinfo_file for single file descriptor. > > > There is another project that resolves file descriptors to file names: > > https://github.com/PixarAnimationStudios/USD/blob/release/pxr/base/arch/fileSystem.cpp#L470 > > > Maybe it makes sense to provide a sysctl or fcntl that would return a list > of paths for a given file descriptor? > > I opened the PR for this: > https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=260241 > https://reviews.freebsd.org/D33277