From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1l9lFf-0007yB-Q4 for barebox@lists.infradead.org; Wed, 10 Feb 2021 08:53:36 +0000 References: <198822053.215492.1612946220837@office.mailbox.org> From: Ahmad Fatoum Message-ID: <4a80a490-3c75-4588-272d-45ee15f32ab0@pengutronix.de> Date: Wed, 10 Feb 2021 09:53:34 +0100 MIME-Version: 1.0 In-Reply-To: <198822053.215492.1612946220837@office.mailbox.org> Content-Language: en-US List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: Re: Using barebox-state as library To: barebox+mailing@cookiesoft.de, "barebox@lists.infradead.org" Hello Marcel, On 10.02.21 09:37, barebox+mailing@cookiesoft.de wrote: > Hey everyone, > > I would like to set and read barebox-states during runtime. Unfortunately only a binary is available to be used. > But because the variable names and values are from an untrusted environment, I don't like them to be passed to a shell directly. I can't follow here. Why can't you run barebox-state with the required arguments? That's what e.g. RAUC is doing. It can listen on DBus for e.g. a mark-good and then calls barebox-state with the correct arguments. You can use standard Linux access control mechanisms, so only your daemon's group may use barebox-state. > Therefore I would like to use a barebox-state library, which offers some functions, e.g. read_var, set_var, ... dt-utils and barebox-sate is GPL2-licensed, so if that's acceptable for your daemon, you could take dt-utils:src/barebox-state.c and replace the argument parsing with whatever. I am not aware whether someone did that before though. > An other approach would be some kind of IPC, e.g. dbus or similar, but I'm not sure if that would fit into the simplicity of the current binary. > > Do you see any other possibilities so fetch and set variables from the barebox-state? > Greetings, > Marcel Cheers, Ahmad > > _______________________________________________ > barebox mailing list > barebox@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/barebox > -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox