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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2015 Andy Wingo <wingo@igalia.com>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix 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 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix 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 GNU Guix. If not, see <http://www.gnu.org/licenses/>.
(define-module (gnu services upower)
#:use-module (gnu services)
#:use-module (gnu system shadow)
#:use-module (gnu packages gnome)
#:use-module (ice-9 match)
#:use-module (guix monads)
#:use-module (guix store)
#:use-module (guix gexp)
#:export (upower-service))
;;; Commentary:
;;;
;;; This module provides service definitions for the UPower power and battery
;;; monitoring service.
;;;
;;; Code:
(define* (configuration-file #:key watts-up-pro? poll-batteries? ignore-lid?
use-percentage-for-policy? percentage-low
percentage-critical percentage-action
time-low time-critical time-action
critical-power-action)
"Return an upower-daemon configuration file."
(define (bool value)
(if value "true\n" "false\n"))
(text-file "UPower.conf"
(string-append
"[UPower]\n"
"EnableWattsUpPro=" (bool watts-up-pro?)
"NoPollBatteries=" (bool (not poll-batteries?))
"IgnoreLid=" (bool ignore-lid?)
"UsePercentageForPolicy=" (bool use-percentage-for-policy?)
"PercentageLow=" (number->string percentage-low) "\n"
"PercentageCritical=" (number->string percentage-critical) "\n"
"PercentageAction=" (number->string percentage-action) "\n"
"TimeLow=" (number->string time-low) "\n"
"TimeCritical=" (number->string time-critical) "\n"
"TimeAction=" (number->string time-action) "\n"
"CriticalPowerAction=" (match critical-power-action
('hybrid-sleep "HybridSleep")
('hibernate "Hibernate")
('power-off "PowerOff"))
"\n")))
(define* (upower-service #:key (upower upower)
(watts-up-pro? #f)
(poll-batteries? #t)
(ignore-lid? #f)
(use-percentage-for-policy? #f)
(percentage-low 10)
(percentage-critical 3)
(percentage-action 2)
(time-low 1200)
(time-critical 300)
(time-action 120)
(critical-power-action 'hybrid-sleep))
"Return a service that runs @uref{http://upower.freedesktop.org/,
@command{upowerd}}, a system-wide monitor for power consumption and battery
levels, with the given configuration settings. It implements the
@code{org.freedesktop.UPower} D-Bus interface, and is notably used by GNOME."
(mlet %store-monad ((config (configuration-file
#:watts-up-pro? watts-up-pro?
#:poll-batteries? poll-batteries?
#:ignore-lid? ignore-lid?
#:use-percentage-for-policy? use-percentage-for-policy?
#:percentage-low percentage-low
#:percentage-critical percentage-critical
#:percentage-action percentage-action
#:time-low time-low
#:time-critical time-critical
#:time-action time-action
#:critical-power-action critical-power-action)))
(return
(service
(documentation "Run the UPower power and battery monitor.")
(provision '(upower-daemon))
(requirement '(dbus-system udev))
(start #~(make-forkexec-constructor
(list (string-append #$upower "/libexec/upowerd"))
#:environment-variables
(list (string-append "UPOWER_CONF_FILE_NAME=" #$config))))
(stop #~(make-kill-destructor))
(activate #~(begin
(use-modules (guix build utils))
(mkdir-p "/var/lib/upower")
(let ((user (getpwnam "upower")))
(chown "/var/lib/upower"
(passwd:uid user) (passwd:gid user)))))
(user-groups (list (user-group
(name "upower")
(system? #t))))
(user-accounts (list (user-account
(name "upower")
(group "upower")
(system? #t)
(comment "UPower daemon user")
(home-directory "/var/empty")
(shell
"/run/current-system/profile/sbin/nologin"))))))))
;;; upower.scm ends here
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