diff options
Diffstat (limited to 'gnu')
| -rw-r--r-- | gnu/services/avahi.scm | 108 | ||||
| -rw-r--r-- | gnu/services/dbus.scm | 120 |
2 files changed, 228 insertions, 0 deletions
diff --git a/gnu/services/avahi.scm b/gnu/services/avahi.scm new file mode 100644 index 0000000000..4b52fd7840 --- /dev/null +++ b/gnu/services/avahi.scm @@ -0,0 +1,108 @@ +;;; GNU Guix --- Functional package management for GNU +;;; Copyright © 2014 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 avahi) + #:use-module (gnu services) + #:use-module (gnu system shadow) + #:use-module (gnu packages avahi) + #:use-module (guix monads) + #:use-module (guix gexp) + #:export (avahi-service)) + +;;; Commentary: +;;; +;;; This module provides service definitions for the Avahi +;;; "zero-configuration" tool set. +;;; +;;; Code: + +(define* (configuration-file #:key host-name publish? + ipv4? ipv6? wide-area? domains-to-browse) + "Return an avahi-daemon configuration file." + (define (bool value) + (if value "yes\n" "no\n")) + + (text-file "avahi-daemon.conf" + (string-append + "[server]\n" + (if host-name + (string-append "host-name=" host-name "\n") + "") + + "browse-domains=" (string-join domains-to-browse) + "\n" + "use-ipv4=" (bool ipv4?) + "use-ipv6=" (bool ipv6?) + "[wide-area]\n" + "enable-wide-area=" (bool wide-area?) + "[publish]\n" + "disable-publishing=" (bool (not publish?))))) + +(define* (avahi-service #:key (avahi avahi) + host-name + (publish? #t) + (ipv4? #t) (ipv6? #t) + wide-area? + (domains-to-browse '())) + "Return a service that runs @command{avahi-daemon}, a system-wide +mDNS/DNS-SD responder that allows for service discovery and +\"zero-configuration\" host name lookups. + +If @var{host-name} is different from @code{#f}, use that as the host name to +publish for this machine; otherwise, use the machine's actual host name. + +When @var{publish?} is true, publishing of host names and services is allowed; +in particular, avahi-daemon will publish the machine's host name and IP +address via mDNS on the local network. + +When @var{wide-area?} is true, DNS-SD over unicast DNS is enabled. + +Boolean values @var{ipv4?} and @var{ipv6?} determine whether to use IPv4/IPv6 +sockets." + (mlet %store-monad ((config (configuration-file #:host-name host-name + #:publish? publish? + #:ipv4? ipv4? + #:ipv6? ipv6? + #:wide-area? wide-area? + #:domains-to-browse + domains-to-browse))) + (return + (service + (documentation "Run the Avahi mDNS/DNS-SD responder.") + (provision '(avahi-daemon)) + (requirement '(dbus-system networking)) + + (start #~(make-forkexec-constructor + (string-append #$avahi "/sbin/avahi-daemon") + "--syslog" "-f" #$config)) + (stop #~(make-kill-destructor)) + (activate #~(begin + (use-modules (guix build utils)) + (mkdir-p "/var/run/avahi-daemon"))) + + (user-groups (list (user-group + (name "avahi")))) + (user-accounts (list (user-account + (name "avahi") + (group "avahi") + (comment "Avahi daemon user") + (home-directory "/var/empty") + (shell + "/run/current-system/profile/sbin/nologin")))))))) + +;;; avahi.scm ends here diff --git a/gnu/services/dbus.scm b/gnu/services/dbus.scm new file mode 100644 index 0000000000..3fbbfde09b --- /dev/null +++ b/gnu/services/dbus.scm @@ -0,0 +1,120 @@ +;;; GNU Guix --- Functional package management for GNU +;;; Copyright © 2014 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 system shadow) + #:use-module (gnu packages glib) + #:use-module (guix monads) + #:use-module (guix gexp) + #:export (dbus-service)) + +;;; Commentary: +;;; +;;; This module supports the configuration of the D-Bus message bus +;;; (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. +;;; +;;; Code: + +(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)) + + (define (services->sxml services) + ;; Return the SXML 'includedir' clauses for DIRS. + `(busconfig + ,@(map (lambda (dir) + `(includedir ,(string-append dir + "/etc/dbus-1/system.d"))) + 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}. + +@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 + (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")))) + (user-accounts (list (user-account + (name "messagebus") + (group "messagebus") + (comment "D-Bus system bus user") + (home-directory "/var/run/dbus") + (shell + "/run/current-system/profile/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))))))))))) + +;;; dbus.scm ends here |