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Diffstat (limited to 'gnu/services/desktop.scm')
| -rw-r--r-- | gnu/services/desktop.scm | 270 |
1 files changed, 270 insertions, 0 deletions
diff --git a/gnu/services/desktop.scm b/gnu/services/desktop.scm new file mode 100644 index 0000000000..5945f7af18 --- /dev/null +++ b/gnu/services/desktop.scm @@ -0,0 +1,270 @@ +;;; GNU Guix --- Functional package management for GNU +;;; Copyright © 2014, 2015 Ludovic Courtès <ludo@gnu.org> +;;; 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 desktop) + #:use-module (gnu services) + #:use-module (gnu system shadow) + #:use-module (gnu packages glib) + #:use-module (gnu packages admin) + #:use-module (gnu packages gnome) + #:use-module (guix monads) + #:use-module (guix store) + #:use-module (guix gexp) + #:use-module (ice-9 match) + #:export (dbus-service + upower-service + colord-service)) + +;;; Commentary: +;;; +;;; This module contains service definitions for a "desktop" environment. +;;; +;;; Code: + + +;;; +;;; D-Bus. +;;; + +(define (dbus-configuration-directory dbus services) + "Return a configuration directory for @var{dbus} that includes the +@code{etc/dbus-1/system.d} directories of each package listed in +@var{services}." + (define build + #~(begin + (use-modules (sxml simple) + (srfi srfi-1)) + + (define (services->sxml services) + ;; Return the SXML 'includedir' clauses for DIRS. + `(busconfig + ,@(append-map (lambda (dir) + `((includedir + ,(string-append dir "/etc/dbus-1/system.d")) + (servicedir ;for '.service' files + ,(string-append dir "/share/dbus-1/services")))) + services))) + + (mkdir #$output) + (copy-file (string-append #$dbus "/etc/dbus-1/system.conf") + (string-append #$output "/system.conf")) + + ;; The default 'system.conf' has an <includedir> clause for + ;; 'system.d', so create it. + (mkdir (string-append #$output "/system.d")) + + ;; 'system-local.conf' is automatically included by the default + ;; 'system.conf', so this is where we stuff our own things. + (call-with-output-file (string-append #$output "/system-local.conf") + (lambda (port) + (sxml->xml (services->sxml (list #$@services)) + port))))) + + (gexp->derivation "dbus-configuration" build)) + +(define* (dbus-service services #:key (dbus dbus)) + "Return a service that runs the \"system bus\", using @var{dbus}, with +support for @var{services}. + +@uref{http://dbus.freedesktop.org/, D-Bus} is an inter-process communication +facility. Its system bus is used to allow system services to communicate and +be notified of system-wide events. + +@var{services} must be a list of packages that provide an +@file{etc/dbus-1/system.d} directory containing additional D-Bus configuration +and policy files. For example, to allow avahi-daemon to use the system bus, +@var{services} must be equal to @code{(list avahi)}." + (mlet %store-monad ((conf (dbus-configuration-directory dbus services))) + (return + (service + (documentation "Run the D-Bus system daemon.") + (provision '(dbus-system)) + (requirement '(user-processes)) + (start #~(make-forkexec-constructor + (list (string-append #$dbus "/bin/dbus-daemon") + "--nofork" + (string-append "--config-file=" #$conf "/system.conf")))) + (stop #~(make-kill-destructor)) + (user-groups (list (user-group + (name "messagebus") + (system? #t)))) + (user-accounts (list (user-account + (name "messagebus") + (group "messagebus") + (system? #t) + (comment "D-Bus system bus user") + (home-directory "/var/run/dbus") + (shell + #~(string-append #$shadow "/sbin/nologin"))))) + (activate #~(begin + (use-modules (guix build utils)) + + (mkdir-p "/var/run/dbus") + + (let ((user (getpwnam "messagebus"))) + (chown "/var/run/dbus" + (passwd:uid user) (passwd:gid user))) + + (unless (file-exists? "/etc/machine-id") + (format #t "creating /etc/machine-id...~%") + (let ((prog (string-append #$dbus "/bin/dbus-uuidgen"))) + ;; XXX: We can't use 'system' because the initrd's + ;; guile system(3) only works when 'sh' is in $PATH. + (let ((pid (primitive-fork))) + (if (zero? pid) + (call-with-output-file "/etc/machine-id" + (lambda (port) + (close-fdes 1) + (dup2 (port->fdes port) 1) + (execl prog))) + (waitpid pid))))))))))) + + +;;; +;;; Upower D-Bus service. +;;; + +(define* (upower-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 (upower-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=" #$config)))) + (stop #~(make-kill-destructor)) + (activate #~(begin + (use-modules (guix build utils)) + (mkdir-p "/var/lib/upower") + (let ((user (getpwnam "upower"))) + (chown "/var/lib/upower" + (passwd:uid user) (passwd:gid user))))) + + (user-groups (list (user-group + (name "upower") + (system? #t)))) + (user-accounts (list (user-account + (name "upower") + (group "upower") + (system? #t) + (comment "UPower daemon user") + (home-directory "/var/empty") + (shell + #~(string-append #$shadow "/sbin/nologin"))))))))) + + +;;; +;;; Colord D-Bus service. +;;; + +(define* (colord-service #:key (colord colord)) + "Return a service that runs @command{colord}, a system service with a D-Bus +interface to manage the color profiles of input and output devices such as +screens and scanners. It is notably used by the GNOME Color Manager graphical +tool. See @uref{http://www.freedesktop.org/software/colord/, the colord web +site} for more information." + (with-monad %store-monad + (return + (service + (documentation "Run the colord color management service.") + (provision '(colord-daemon)) + (requirement '(dbus-system udev)) + + (start #~(make-forkexec-constructor + (list (string-append #$colord "/libexec/colord")))) + (stop #~(make-kill-destructor)) + (activate #~(begin + (use-modules (guix build utils)) + (mkdir-p "/var/lib/colord") + (let ((user (getpwnam "colord"))) + (chown "/var/lib/colord" + (passwd:uid user) (passwd:gid user))))) + + (user-groups (list (user-group + (name "colord") + (system? #t)))) + (user-accounts (list (user-account + (name "colord") + (group "colord") + (system? #t) + (comment "colord daemon user") + (home-directory "/var/empty") + (shell + #~(string-append #$shadow "/sbin/nologin"))))))))) + +;;; desktop.scm ends here |