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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Adhemerval Zanella via Libc-alpha Reply-To: Adhemerval Zanella Errors-To: libc-alpha-bounces@sourceware.org Sender: "Libc-alpha" On 30/07/2020 15:54, Joseph Myers wrote: > On Thu, 30 Jul 2020, Florian Weimer via Libc-alpha wrote: > >> Sounds reasonable. We also have a security bug that is related to >> direct access to these files: >> >> >> >> If we need to mediate access for format translation, maybe this can be >> addressed at the same time? > > Having different filenames for the new format might be safest, which would > naturally go along with having some form of mediation for access to utmp / > wtmp / lastlog. > The different filename sound slike a strategy and I understand that the idea would also to use new versions for the utmp/utmpx symbols. What about the compatibility symbols, should them be built on top of the new ABI and access the newer files or use the old format and access the old filenames? As for lastlog, I think it would be feasible to provide a API to mediate the file access as a GNU extension.