guix-devel/gnu/services/dbus.scm

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services: Introduce extensible services. This patch rewrites GuixSD services to make them extensible. * gnu-system.am (GNU_SYSTEM_MODULES): Add gnu/services/dbus.scm. * gnu/services.scm (<service>): Replace with new record type. (<service-extension>, <service-type>): New record types. (write-service-type, compute-boot-script, second-argument): New procedures. (%boot-service, boot-service-type): New variables. (file-union, directory-union, modprobe-wrapper, activation-service->script, activation-script, gexps->activation-gexp): New procedures. (activation-service-type, %activation-service): New variables. (etc-directory, files->etc-directory, etc-service): New procedures. (etc-service-type, setuid-program-service, firmware-service-type): New variables. (firmware->activation-gexp): New procedure. (&service-error, &missing-target-service-error, &ambiguous-target-service-error): New condition types. (service-back-edges, fold-services): New procedures. * gnu/services/avahi.scm (<avahi-configuration>): New record type. (configuration-file): Replace keyword parameters with a single 'config' parameter. (%avahi-accounts, %avahi-activation, avahi-service-type): New variables. (avahi-dmd-service): New procedure. (avahi-service): Rewrite using 'service' and 'avahi-configuration'. * gnu/services/base.scm (%root-file-system-dmd-service, root-file-system-service-type): New variables. (root-file-system-service): Use them. (file-system->dmd-service-name): New procedure. (file-system-service-type): New variable. (file-system-service): Use it. Replace keyword parameters with a single 'file-system' object. (user-unmount-service-type): New variable. (user-unmount-service): Use it. (user-processes-service-type): New variable. (user-processes-service): Use it. (host-name-service-type): New variable. (host-name-service): Use it. (console-keymap-service-type): New variable. (console-keymap-service): Use it. (console-font-service-type): New variable. (console-font-service): Use it. (mingetty-pam-service, mingetty-dmd-service): New procedures. (mingetty-service-type): New variable. (mingetty-service): Use it. (nscd-dmd-service): New procedure. (nscd-activation, nscd-service-type): New variables. (nscd-service): Use the latter. (syslog-service-type): New variable. (syslog-service): Use it. (<guix-configuration>): New record type. (%default-guix-configuration): New variable. (guix-dmd-service, guix-accounts, guix-activation): New procedures. (guix-service-type): New variable. (guix-service): Replace list of keyword parameters with a single 'config' parameter. Rewrite using 'service'. (<udev-configuration>): New record type. (udev-dmd-service): New procedure. (udev-service-type): New variable. (udev-service): Use it. (device-mapping-service-type): New variable. (device-mapping-service): Use it. (swap-service-type): New variable. (swap-service): Use it. * gnu/services/databases.scm (<postgresql-configuration>): New record type. (%postgresql-accounts, postgresql-activation): New variables. (postgresql-dmd-service): New procedure. (postgresql-service): Rewrite using 'service' and 'postgresql-configuration'. * gnu/services/dbus.scm: New file. * gnu/services/desktop.scm (dbus-configuration-directory, dbus-service): Remove. (wrapped-dbus-service): New procedure. (<upower-configuration>): New record type. (upower-configuration-file): Replace keyword parameters with single <upower-configuration> parameter. (%upower-accounts, %upower-activation): New variables. (upower-dbus-service, upower-dmd-service): New procedures. (upower-service-type): New variable. (upower-service): Rewrite using 'service' and 'upower-configuration'. (%colord-activation, %colord-accounts): New variables. (colord-dmd-service): New procedure. (colord-service-type): New variable. (colord-service): Rewrite using 'service'. (<geoclue-configuration>): New record type. (geoclue-configuration-file): Replace keyword parameters with a single 'config' parameter. (geoclue-dbus-service, geoclue-dmd-service): New procedures. (%geoclue-accounts, geoclue-service-type): New variables. (geoclue-service): Rewrite using 'service' and 'geoclue-configuration'. (%polkit-accounts, %polkit-pam-services, polkit-service-type): New variables. (polkit-dmd-service): New procedure. (polkit-service): Rewrite using 'service'. (<elogind-configuration>)[elogind]: New field. (elogind-dmd-service): New procedure. (elogind-service-type): New variable. (elogind-service): Rewrite using 'service'. (%desktop-services): Remove argument to 'dbus-service'. Remove 'map' over %BASE-SERVICES. * gnu/services/dmd.scm (dmd-boot-gexp): New procedure. (dmd-root-service-type, %dmd-root-service): New variables. (dmd-service-type): New macro. (<dmd-service>): New record type. * gnu/services/lirc.scm (<lirc-configuration>): New record type. (%lirc-activation): New variable. (lirc-dmd-service): New procedure. (lirc-service-type): New variable. (lirc-service): Rewrite using 'service' and 'lirc-configuration'. * gnu/services/networking.scm (<static-networking>): New record type. (static-networking-service-type): New variable. (static-networking-service): Rewrite using 'service' and 'static-networking'. (dhcp-client-service-type): New variable. (dhcp-client-service): Rewrite using 'service'. (<ntp-configuration>): New record type. (ntp-dmd-service): New procedure. (ntp-service-type): New variable. (ntp-service): New procedure. (%tor-accounts, tor-service-type): New variable. (tor-dmd-service): New procedure. (tor-service): Rewrite using 'service'. (<bitlbee-configuration>): New record type. (bitlbee-dmd-service): New procedure. (%bitlbee-accounts, %bitlbee-activation, bitlbee-service-type): New variables. (bitlbee-service): Rewrite using 'service'. (%wicd-activation): New variable. (wicd-dmd-service): New procedure. (wicd-service-type): New variable. (wicd-service): Rewrite using 'service'. * gnu/services/ssh.scm (<lsh-configuration>): New record type. (activation): Rename to... (lsh-initialization): ... this. (lsh-activation, lsh-dmd-service, lsh-pam-services): New procedures. (lsh-service-type): New variable. (lsh-service): Rewrite using 'service' and 'lsh-configuration'. * gnu/services/web.scm (<nginx-configuration>): New record type. (%nginx-accounts): New variable. (nginx-activation, nginx-dmd-service): New procedures. (nginx-service-type): New variable. (nginx-service): Rewrite using 'service' and 'nginx-configuration'. * gnu/services/xorg.scm (<slim-configuration>): New record type. (slim-pam-service, slim-dmd-service): New procedures. (slim-service-type): New variable. (slim-service): Rewrite using 'service' and 'slim-configuration'. * gnu/system.scm (file-union): Remove. (other-file-system-services): Adjust to new 'file-system-service' signature. (essential-services): Add #:container? parameter. Add %DMD-ROOT-SERVICE, %ACTIVATION-SERVICE, and calls to 'pam-root-service', 'account-service', 'operating-system-etc-service', and a SETUID-PROGRAM-SERVICE instance. (operating-system-services): Pass #:container? to 'essential-services. (etc-directory): Remove. (operating-system-etc-service): New procedure. Rewrite as a call to 'etc-service'. (operating-system-accounts): Change to not return accounts required by services. (operating-system-etc-directory): Rewrite as a call to 'fold-services' and 'etc-directory'. (user-group->gexp, user-account->gexp, modprobe-wrapper): Remove. (operating-system-activation-script): Rewrite as a call to 'fold-services' and 'activation-service->script'. (operating-system-boot-script): Likewise. (operating-system-derivation): Add call to 'lower-object'. (emacs-site-file, emacs-site-directory, shells-file): Change to use 'computed-file' and 'scheme-file' instead of the monadic procedures. * gnu/system/install.scm (cow-store-service-type): New variable. (cow-store-service): Rewrite using 'service'. (/etc/configuration-files): New procedure. (configuration-template-service-type, %configuration-template-service): New variables. (configuration-template-service): Remove. (installation-services): Adjust accordingly. Adjust argument to 'guix-service'. * gnu/system/linux.scm (/etc-entry, pam-root-service): New procedures. (pam-root-service-type): New variable. * gnu/system/shadow.scm (user-group->gexp, user-account->gexp, account-activation, etc-skel, account-service): New procedures. (account-service-type): New variable. * tests/services.scm: New file. * doc/guix.texi (Base Services, Desktop Services): Adjust accordingly. (Defining Services): Rewrite. * doc/images/service-graph.dot: New file. * doc.am (DOT_FILES): Add it. * po/guix/POTFILES.in: Add gnu/services.scm.
2015-09-17 23:44:26 +02:00
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013, 2014, 2015 Ludovic Courtès <ludo@gnu.org>
;;;
;;; 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 dbus)
#:use-module (gnu services)
#:use-module (gnu services dmd)
#:use-module (gnu system shadow)
#:use-module (gnu packages glib)
#:use-module (gnu packages admin)
#:use-module (guix gexp)
#:use-module (guix records)
#:use-module (srfi srfi-1)
#:use-module (ice-9 match)
#:export (dbus-root-service-type
dbus-service))
;;;
;;; D-Bus.
;;;
(define-record-type* <dbus-configuration>
dbus-configuration make-dbus-configuration
dbus-configuration?
(dbus dbus-configuration-dbus ;<package>
(default dbus))
(services dbus-configuration-services ;list of <package>
(default '())))
(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"))
(servicedir ;likewise, for auto-activation
,(string-append
dir
"/share/dbus-1/system-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)))))
(computed-file "dbus-configuration" build))
(define %dbus-accounts
;; Accounts used by the system bus.
(list (user-group (name "messagebus") (system? #t))
(user-account
(name "messagebus")
(group "messagebus")
(system? #t)
(comment "D-Bus system bus user")
(home-directory "/var/run/dbus")
(shell #~(string-append #$shadow "/sbin/nologin")))))
(define (dbus-activation config)
"Return an activation gexp for D-Bus using @var{config}."
#~(begin
(use-modules (guix build utils))
(mkdir-p "/var/run/dbus")
(let ((user (getpwnam "messagebus")))
(chown "/var/run/dbus"
(passwd:uid user) (passwd:gid user)))
(unless (file-exists? "/etc/machine-id")
(format #t "creating /etc/machine-id...~%")
(let ((prog (string-append #$(dbus-configuration-dbus config)
"/bin/dbus-uuidgen")))
;; XXX: We can't use 'system' because the initrd's
;; guile system(3) only works when 'sh' is in $PATH.
(let ((pid (primitive-fork)))
(if (zero? pid)
(call-with-output-file "/etc/machine-id"
(lambda (port)
(close-fdes 1)
(dup2 (port->fdes port) 1)
(execl prog)))
(waitpid pid)))))))
(define dbus-dmd-service
(match-lambda
(($ <dbus-configuration> dbus services)
(let ((conf (dbus-configuration-directory dbus services)))
(list (dmd-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))))))))
(define dbus-root-service-type
(service-type (name 'dbus)
(extensions
(list (service-extension dmd-root-service-type
dbus-dmd-service)
(service-extension activation-service-type
dbus-activation)
(service-extension account-service-type
(const %dbus-accounts))))
;; Extensions consist of lists of packages (representing D-Bus
;; services) that we just concatenate.
;;
;; FIXME: We need 'dbus-daemon-launch-helper' to be
;; setuid-root for auto-activation to work.
(compose concatenate)
;; The service's parameters field is extended by augmenting
;; its <dbus-configuration> 'services' field.
(extend (lambda (config services)
(dbus-configuration
(inherit config)
(services
(append (dbus-configuration-services config)
services)))))))
(define* (dbus-service #:key (dbus dbus) (services '()))
"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)}."
(service dbus-root-service-type
(dbus-configuration (dbus dbus)
(services services))))
;;; dbus.scm ends here