gnu: Introduce the (gnu services ...) modules.

* gnu/system/dmd.scm: Remove file.  Move contents to...
* gnu/services.scm, gnu/services/base.scm, gnu/services/dmd.scm,
  gnu/services/networking.scm, gnu/services/xorg.scm: ... here.  New
  files.
* gnu/system.scm, gnu/system/vm.scm: Adjust accordingly.
* guix/scripts/system.scm (%user-module): Likewise.
* doc/guix.texi (Using the Configuration System): Likewise.
  (Defining Services): Likewise.

1 files changed, 80 insertions, 0 deletions

diff --git a/gnu/services/networking.scm b/gnu/services/networking.scm
new file mode 100644
index 0000000000..317800db50
--- /dev/null
+++ b/gnu/services/networking.scm
@@ -0,0 +1,80 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2013, 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 networking)
+  #:use-module (gnu services)
+  #:use-module (gnu packages admin)
+  #:use-module (gnu packages linux)
+  #:use-module (guix monads)
+  #:export (static-networking-service))
+
+;;; Commentary:
+;;;
+;;; Networking services.
+;;;
+;;; Code:
+
+(define* (static-networking-service interface ip
+                                    #:key
+                                    gateway
+                                    (name-servers '())
+                                    (inetutils inetutils)
+                                    (net-tools net-tools))
+  "Return a service that starts INTERFACE with address IP.  If GATEWAY is
+true, it must be a string specifying the default network gateway."
+
+  ;; TODO: Eventually we should do this using Guile's networking procedures,
+  ;; like 'configure-qemu-networking' does, but the patch that does this is
+  ;; not yet in stock Guile.
+  (mlet %store-monad ((ifconfig (package-file inetutils "bin/ifconfig"))
+                      (route    (package-file net-tools "sbin/route")))
+    (return
+     (service
+      (documentation
+       (string-append "Set up networking on the '" interface
+                      "' interface using a static IP address."))
+      (provision '(networking))
+      (start `(lambda _
+                ;; Return #t if successfully started.
+                (and (zero? (system* ,ifconfig ,interface ,ip "up"))
+                     ,(if gateway
+                          `(zero? (system* ,route "add" "-net" "default"
+                                           "gw" ,gateway))
+                          #t)
+                     ,(if (pair? name-servers)
+                          `(call-with-output-file "/etc/resolv.conf"
+                             (lambda (port)
+                               (display
+                                "# Generated by 'static-networking-service'.\n"
+                                port)
+                               (for-each (lambda (server)
+                                           (format port "nameserver ~a~%"
+                                                   server))
+                                         ',name-servers)))
+                          #t))))
+      (stop  `(lambda _
+                ;; Return #f is successfully stopped.
+                (not (and (system* ,ifconfig ,interface "down")
+                          (system* ,route "del" "-net" "default")))))
+      (respawn? #f)
+      (inputs `(("inetutils" ,inetutils)
+                ,@(if gateway
+                      `(("net-tools" ,net-tools))
+                      '())))))))
+
+;;; networking.scm ends here