From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mp11.migadu.com ([2001:41d0:8:6d80::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by ms9.migadu.com with LMTPS id eCl7EHBZIWSG/wAASxT56A (envelope-from ) for ; Mon, 27 Mar 2023 10:53:04 +0200 Received: from aspmx1.migadu.com ([2001:41d0:8:6d80::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by mp11.migadu.com with LMTPS id 8J9kEHBZIWRHQgEA9RJhRA (envelope-from ) for ; Mon, 27 Mar 2023 10:53:04 +0200 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by aspmx1.migadu.com (Postfix) with ESMTPS id DF6083A3AA for ; Mon, 27 Mar 2023 10:53:03 +0200 (CEST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pgiad-0005S0-Ry; Mon, 27 Mar 2023 04:52:31 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pgiab-0005RW-9o for guix-devel@gnu.org; Mon, 27 Mar 2023 04:52:29 -0400 Received: from mail-40136.proton.ch ([185.70.40.136]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pgiaX-00034t-VN for guix-devel@gnu.org; Mon, 27 Mar 2023 04:52:29 -0400 Date: Mon, 27 Mar 2023 08:52:13 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=lendvai.name; s=protonmail2; t=1679907143; x=1680166343; bh=yjyFClRSrwJF97aayQUUtr7dQ0e9PHHiXyeTO+hYWlw=; h=Date:To:From:Cc:Subject:Message-ID:In-Reply-To:References: Feedback-ID:From:To:Cc:Date:Subject:Reply-To:Feedback-ID: Message-ID:BIMI-Selector; b=JBKQBoEvhOYeGtzhuNxh9SN3WqVW4YHZ3iXuiMffASpHIKoltCiAB0TjihOfqQbQR SQSXqqDweFFS/gnb3CGsTKQSCEgz1l/LVEzE+Y3yP9tFwmpXAmm89C888JejU/kIHl T1WuIxAVjK8h6ET1bHbFA5FeyMBed0MvchAo9n9yUNoJ+AZfVNI/a2Of/q0EgY3wrw DIfP4rCji0/qMLQiTatvZteWWXo/UPR0ni7tqQGaWniKkqPlxddoAjV79YDjPgWOY1 TDcO4hgWJUDbg8KchSVbp40QdFi51yKqkaJN7U0CC9W0XwcltzMfwQ7eJ8xRG+Pa9X 0Ko8L7WKbm/eg== To: Vladilen Kozin From: Attila Lendvai Cc: guix-devel@gnu.org Subject: Re: how to print values inside shepherd service gexp Message-ID: <792Wq_nV0u6HA8MqreYe3w4t_RvwAPc17nxHQb2TCkUChCScWrGID9LHersgzD4-hbEA03edK63nVaAPI-Q5mC0zxuafa26TMutGY664pUc=@lendvai.name> In-Reply-To: References: Feedback-ID: 28384833:user:proton MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Received-SPF: pass client-ip=185.70.40.136; envelope-from=attila@lendvai.name; helo=mail-40136.proton.ch X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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_MSPIKE_H2=-0.001, 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-Country: US X-Migadu-Flow: FLOW_IN ARC-Seal: i=1; s=key1; d=yhetil.org; t=1679907184; a=rsa-sha256; cv=none; b=YhPKwWoeUe/6RHP+IbokZysyu64dICjbDo+p020Yf6DRuiyLzU6C/4z6/5GW7P0SeICUZT IF9iKJJFIRd3pqSHABU8FjwE/9K1wMzmh7MAXbeoRZAy3S7q8R2VVJBrLxdsiJxThBs77z YbBLux9xm2/Und+5sDzblWQAmhso86IF0L0Y3ypITXjwzrYb44MpjMlyeJpEzfvBjd/N3c j8SkUnhyXuyV4tfPWeqb0FgPSYBkCOoLZl0DCGX965wVMW35ENmFc0CTHUV/J+X16ajiP0 garLOBRlNsLzfixH7v14boSBgW+YgnnAtjLb6HQ78oEpADRocLLIxlLzOmJE7A== ARC-Authentication-Results: i=1; aspmx1.migadu.com; dkim=pass header.d=lendvai.name header.s=protonmail2 header.b=JBKQBoEv; dmarc=none; spf=pass (aspmx1.migadu.com: domain of "guix-devel-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="guix-devel-bounces+larch=yhetil.org@gnu.org" ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=yhetil.org; s=key1; t=1679907184; h=from:from:sender:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:list-id:list-help: list-unsubscribe:list-subscribe:list-post:dkim-signature; bh=yjyFClRSrwJF97aayQUUtr7dQ0e9PHHiXyeTO+hYWlw=; b=Re3K7UaBX7JZtYjjRNnyR3XhLoV7Xk/mT42/jGK//SSpT6NjdyV/UXQ1Mi5lUI0NLPaExq VDnxuhnRA5C8W2JvYQegwFf3++D1MHdd+lzJauYpTfpzK1CBrTfhxftY4D/hf+mkK3wSAs YnWda6Lx83gY7GIWI19lRC8U5R2+Qkm5FOZOVuRwJpwO7WDtM5W19NXCc+8TiubUdsssy7 UaghMNEy1bjrjI51E0+9hZsgs0Ya/I5aSNzMZenadS8WvvbkGpC1C0Fkx06PC19JOhzrg/ n1JWtUcoJ0Pt5N8KeFJDjv7xJwRME1ag8MtEEKPcRraTWmx8sSemkWwEn+PisQ== Authentication-Results: aspmx1.migadu.com; dkim=pass header.d=lendvai.name header.s=protonmail2 header.b=JBKQBoEv; dmarc=none; spf=pass (aspmx1.migadu.com: domain of "guix-devel-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="guix-devel-bounces+larch=yhetil.org@gnu.org" X-Migadu-Scanner: scn1.migadu.com X-Migadu-Spam-Score: -4.27 X-Spam-Score: -4.27 X-Migadu-Queue-Id: DF6083A3AA X-TUID: N1ybqw3gz30o > (shepherd-service > (start > #~(make-forkexec-constructor > some-command > #:directory (pk #$twgter-directory) > #:log-file (pk #$twgter-log-file)) > )) >=20 > If we instantiate this process in our OS declaration under services > and then run that OS inside a container and `herd start > this-service`, where would the above (pk ..) values show up? They > aren't in /var/log/messages and they aren't in whatever #:log-file we > specified. I imagine this gexp turns into a Guile script somewhere > inside the store and Shepherd runs it when we start the service. my understanding is that they will run when shepherd starts the service, and it should land in /var/log/messages. but in my experience shepherd's handling of logs and stdout should receive some more care. e.g. errors from the start GEXP are not logged, and if an error happens before your pk's, then you won't see any sign of them. i have a commit that i'm testing locally that addresses that: https://github.com/attila-lendvai-patches/shepherd/commits/attila HTH, --=20 =E2=80=A2 attila lendvai =E2=80=A2 PGP: 963F 5D5F 45C7 DFCD 0A39 -- =E2=80=9CWhat you do speaks so loud I cannot hear what you say.=E2=80=9D =09=E2=80=94 Ralph Waldo Emerson (1803=E2=80=931882)