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services: Add upower.

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* gnu-system.am (GNU_SYSTEM_MODULES): Add gnu/services/upower.scm.
* gnu/services/upower.scm: New file, defining a upower service.
* doc/guix.texi (Various Services): Mention it.

Co-authored-by: Ludovic Courtès <ludo@gnu.org>
This commit is contained in:
Andy Wingo 2015-04-04 21:49:02 +02:00 committed by Ludovic Courtès
parent a1d5bb0ec7
commit be23412848
3 changed files with 144 additions and 0 deletions
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21
doc/guix.texi
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@ -4831,6 +4831,27 @@ Finally, @var{extra-options} is a list of additional command-line options
passed to @command{lircd}.
@end deffn
@code{(gnu services upower)} provides a power-management daemon:
@deffn {Monadic Procedure} upower-service [#:upower @var{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.
@end deffn
@code{(gnu services colord)} provides a color management service:
@deffn {Monadic Procedure} colord-service [#:colord @var{colord}]

1
gnu-system.am
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@ -330,6 +330,7 @@ GNU_SYSTEM_MODULES = \
gnu/services/lirc.scm \
gnu/services/networking.scm \
gnu/services/ssh.scm \
gnu/services/upower.scm \
gnu/services/xorg.scm \
\
gnu/system.scm \

122
gnu/services/upower.scm Normal file
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@ -0,0 +1,122 @@
;;; 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