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;;; Consfigurator -- Lisp declarative configuration management system
;;; Copyright (C) 2021 Sean Whitton <spwhitton@spwhitton.name>
;;; This file is free software; you can redistribute it and/or modify
;;; it under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3, or (at your option)
;;; any later version.
;;; This file is distributed in the hope that it will be useful,
;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;; GNU General Public License for more details.
;;; You should have received a copy of the GNU General Public License
;;; along with this program. If not, see <http://www.gnu.org/licenses/>.
(in-package :consfigurator.property.systemd)
(named-readtables:in-readtable :consfigurator)
;;; Using systemctl(1), we cannot enable or disable user units unless the
;;; user's service manager is actually running, and using loginctl(1), we
;;; cannot enable or disable user lingering unless systemd is PID 1.
;;;
;;; Possibly we should manually create the symlinks in the former case, and
;;; touch and delete the file under /var/lib/systemd/linger in the latter
;;; case, so that more configuration is applicable to unbooted chroots.
(defun systemctl (fn user &rest args &aux (args (cons "systemctl" args)))
(apply fn (if user (apply #'systemd--user args) args)))
(defprop started :posix (service &optional user)
(:desc #?"systemd service ${service} started")
(:check (or (service:no-services-p)
(zerop (systemctl #'mrun user :for-exit "is-active" service))))
(:apply (systemctl #'mrun user "start" service)))
(defprop stopped :posix (service &optional user)
(:desc #?"systemd service ${service} stopped")
(:check (or (service:no-services-p)
(plusp (systemctl #'mrun user :for-exit "is-active" service))))
(:apply (systemctl #'mrun user "stop" service)))
(defprop enabled :posix (service &optional user)
(:desc #?"systemd service ${service} enabled")
(:check (or (and user (service:no-services-p))
(zerop (systemctl #'mrun user :for-exit "is-enabled" service))))
(:apply (systemctl #'mrun user "enable" service)))
(defprop disabled :posix (service &optional user)
(:desc #?"systemd service ${service} disabled")
(:check
(or
(and user (service:no-services-p))
(let ((status
(stripln
(systemctl #'run user :may-fail "is-enabled" service))))
(or (string-prefix-p "linked" status)
(string-prefix-p "masked" status)
(memstring=
status '("static" "disabled" "generated" "transient" "indirect"))))))
(:apply (systemctl #'mrun user "disable" service)))
(defprop masked :posix (service &optional user)
(:desc #?"systemd service ${service} masked")
(:check
(or (and user (service:no-services-p))
(string-prefix-p
"masked"
(systemctl #'run user :may-fail "is-enabled" service))))
(:apply (systemctl #'mrun user "mask" service))
(:unapply (if (and user (service:no-services-p))
:no-change
(systemctl #'mrun user "unmask" service))))
(defprop lingering-enabled :posix (user)
(:desc #?"User lingering enable for ${user}")
(:check (or (service:no-services-p)
(memstring= "Linger=yes" (runlines "loginctl" "show-user" user))))
(:apply (mrun "loginctl" "enable-linger" user))
(:unapply (if (service:no-services-p)
:no-change
(mrun "loginctl" "disable-linger" user))))
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