[PATCH 4/4] gnu: Add polkit service.

[Andy Wingo <wingo@pobox.com>]

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* gnu/services/polkit.scm: New file.
* gnu-system.am (GNU_SYSTEM_MODULES): Add polkit service definition.
---
 gnu-system.am           |  1 +
 gnu/services/polkit.scm | 67 +++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 68 insertions(+)
 create mode 100644 gnu/services/polkit.scm

diff --git a/gnu-system.am b/gnu-system.am
index 164564a..5a4d448 100644
--- a/gnu-system.am
+++ b/gnu-system.am
@@ -330,6 +330,7 @@ GNU_SYSTEM_MODULES =				\
   gnu/services/dmd.scm				\
   gnu/services/lirc.scm				\
   gnu/services/networking.scm			\
+  gnu/services/polkit.scm			\
   gnu/services/ssh.scm				\
   gnu/services/upower.scm			\
   gnu/services/xorg.scm				\
diff --git a/gnu/services/polkit.scm b/gnu/services/polkit.scm
new file mode 100644
index 0000000..56ed365
--- /dev/null
+++ b/gnu/services/polkit.scm
@@ -0,0 +1,67 @@
+;;; 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 polkit)
+  #:use-module (gnu services)
+  #:use-module (gnu system shadow)
+  #:use-module (gnu packages polkit)
+  #:use-module (ice-9 match)
+  #:use-module (guix monads)
+  #:use-module (guix store)
+  #:use-module (guix gexp)
+  #:export (polkit-application
+            %standard-polkit-applications
+            polkit-service))
+
+;;; Commentary:
+;;;
+;;; This module provides a service definition for Polkit, the privilege
+;;; management service.
+;;;
+;;; Code:
+
+(define (bool value)
+  (if value "true\n" "false\n"))
+
+(define* (polkit-service #:key (polkit polkit))
+  "Return a service that runs the @command{polkit} location service."
+  (with-monad %store-monad
+    (return
+     (service
+      (documentation "Run the Polkit privilege management.")
+      (provision '(polkit-daemon))
+      (requirement '(dbus-system))
+
+      (start #~(make-forkexec-constructor
+                (list (string-append #$polkit "/lib/polkit-1/polkitd"))))
+      (stop #~(make-kill-destructor))
+
+      (user-groups (list (user-group
+                          (name "polkitd")
+                          (system? #t))))
+      (user-accounts (list (user-account
+                            (name "polkitd")
+                            (group "polkitd")
+                            (system? #t)
+                            (comment "Polkit daemon user")
+                            (home-directory "/var/empty")
+                            (shell
+                             "/run/current-system/profile/sbin/nologin"))))))))
+
+;;; polkit.scm ends here
-- 
2.2.1