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a=rsa-sha256; c=relaxed/simple; d=riseup.net; s=squak; t=1711358080; bh=UvRO7rvEp+Bd7ifJwiuhiplQ0zKebii0WZyt+wk2IM4=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=XMt7ieDg9biHawHyVZhthB54fT5Ln1rm1E+ZSau6QD5AQID5laCshz6kMitZOkJsf UVp34/TEVEjiypABBbLqKeswv7fpVSaqheur0LVhXLiC/pxbSjKIEuJA1PwbcqOQFo Lt6Qh2URRc+t19VwOzm6heuBTaHIZt0fetkWivME= X-Riseup-User-ID: 8FB197742526942074555E4A04CB63AF65272C4AA6F0445AE9DA8B968218DD6E Received: from [127.0.0.1] (localhost [127.0.0.1]) by fews01-sea.riseup.net (Postfix) with ESMTPSA id 4V36hH6V97zJrXv; Mon, 25 Mar 2024 09:14:39 +0000 (UTC) MIME-Version: 1.0 Date: Mon, 25 Mar 2024 09:14:39 +0000 From: raingloom@riseup.net To: =?UTF-8?Q?Ludovic_Court=C3=A8s?= Cc: Guix Devel Subject: Re: Shepherd timers In-Reply-To: <87jzlrpbsr.fsf@gnu.org> References: <87jzlrpbsr.fsf@gnu.org> Message-ID: <52d74fdc10823957b60b233f52df1638@riseup.net> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=198.252.153.6; envelope-from=raingloom@riseup.net; helo=mx0.riseup.net 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 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: guix-devel@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Development of GNU Guix and the GNU System distribution." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guix-devel-bounces+larch=yhetil.org@gnu.org Sender: guix-devel-bounces+larch=yhetil.org@gnu.org X-Migadu-Flow: FLOW_IN X-Migadu-Country: US X-Migadu-Queue-Id: 11DA63B657 X-Spam-Score: -10.89 X-Migadu-Spam-Score: -10.89 X-Migadu-Scanner: mx11.migadu.com X-TUID: HyvSArf/t7MN On 2024-03-24 22:20, Ludovic Courtès wrote: > Hello Guix! > > I pushed to the ‘devel’ branch of the Shepherd a new module that > implements “timers” along with ‘herd’ support to display information > about them. > > It lets you provide configuration like this one: > > --8<---------------cut here---------------start------------->8--- > (use-modules (shepherd service timer)) > > (define timer > (service '(my-timer) > #:start (make-timer-constructor > (calendar-event #:seconds '(0 7 15 22 30 45)) > (command '("sh" "-c" "echo Hi from $PWD.; sleep 20; echo done"))) > #:stop (make-timer-destructor))) > > (register-services (list timer)) > (start-in-the-background '(my-timer)) > --8<---------------cut here---------------end--------------->8--- > > And then ‘my-timer’ invokes the given command at the moments that match > the constraints defined by ‘calendar-event’—in this case any time the > number of seconds is equal to 0, 7, 15, 22, 30, or 45. You can also > make it every Monday at 9AM etc., as you would expect. > > The ‘herd’ command provides details information about the timer: > > --8<---------------cut here---------------start------------->8--- > $ ./herd -s sock status my-timer > Status of my-timer: > It is running since 21:09:32 (68 seconds ago). > Timed service. > Periodically running: sh -c "echo Hi from $PWD.; sleep 20; echo done". > Child process: 1814 > It is enabled. > Provides (my-timer). > Requires (). > Will not be respawned. > > Recent runs: > 2024-03-24 21:10:04 Process exited successfully. > 2024-03-24 21:10:19 Process exited successfully. > 2024-03-24 21:10:26 Process exited successfully. > 2024-03-24 21:10:34 Process exited successfully. > 2024-03-24 21:10:35 Process terminated with signal 15. > > Recent messages: > 2024-03-24 21:10:29 Hi from /home/ludo. > > Upcoming timer alarms: > 21:10:45 (in 5 seconds) > 21:11:00 (in 20 seconds) > 21:11:07 (in 27 seconds) > 21:11:15 (in 35 seconds) > 21:11:22 (in 42 seconds) > --8<---------------cut here---------------end--------------->8--- > > And of course you can do anything you can do with a service: stop it, > unload it, load a replacement, and so on. > > Feedback & suggestions welcome! > > Ludo’. Does it support RTC wakeup?