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Sun, 28 Jan 2024 09:04:35 -0500 (EST) From: =?utf-8?Q?Cl=C3=A9ment_Lassieur?= To: Richard Sent Cc: help-guix@gnu.org Subject: Re: Using gexps in wireguard-service-type postup In-Reply-To: <93b89074d790b8554de4c10434fc6be2@freakingpenguin.com> (Richard Sent's message of "Sat, 27 Jan 2024 21:19:54 -0500") References: <93b89074d790b8554de4c10434fc6be2@freakingpenguin.com> Date: Sun, 28 Jan 2024 15:04:32 +0100 Message-ID: <87wmrttuz3.fsf@lassieur.org> User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Received-SPF: pass client-ip=64.147.123.21; envelope-from=clement@lassieur.org; helo=wout5-smtp.messagingengine.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: help-guix@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-guix-bounces+larch=yhetil.org@gnu.org Sender: help-guix-bounces+larch=yhetil.org@gnu.org X-Migadu-Flow: FLOW_IN X-Migadu-Country: US X-Migadu-Scanner: mx10.migadu.com X-Spam-Score: -10.35 X-Migadu-Queue-Id: 22CC9B1EA X-Migadu-Spam-Score: -10.35 X-TUID: +FdO7PeLUEgd Hi Richard, On Sat, Jan 27 2024, Richard Sent wrote: > Hi all, > > I'm trying to create a wireguard service, but I've encountered an issue > that I'm pretty sure I can only resolve using gexps and am having > trouble with the syntax (or if it's even possible to use them in this > case). > > I want to fetch my private key from password-store when running the > service, and a PostUp command seems the best way of implementing > that. Using the wg-quick manual as a base, I get a naive solution like: I think, here you can just add (use-modules (gnu packages admin)) > (define* (get-secret-command key #:optional (user (sudo-user))) > "Returns the shell command needed to read KEY from USER." > (string-append "sudo -u " user " pass ls " key)) > > (service wireguard-service-type > (wireguard-configuration (private-key (file-append sudo "/bin/sudo -u user <(pass ...)")) which would be se same as (private-key #~(string-append #$sudo "/bin/sudo -u user <(pass ...)= ")) > ... > (post-up (list > ;; Returns "wg set wg-nickleslan private-key <(sudo pass > ;; ls wireguard-nickleslan-private-key-key)" > (string-append "wg set " interface " private-key <(" > (get-secret-command=20 > wireguard-nickleslan-private-key-key) ")") > (string-append "wg set " interface " peer "=20 > wireguard-nickleslan-public-key > " preshared-key <(" > (get-secret-command=20 > wireguard-nickleslan-preshared-key-key) ")"))))) This will add another "PostUp" field. Cl=C3=A9ment