* Added a job to start the D-Bus system-wide message bus daemon.

svn path=/nixos/trunk/; revision=8848

system/options.nix

@@ -792,6 +792,16 @@
   }
 
   
+  {
+    name = ["services" "dbus" "enable"];
+    default = true;
+    description = "
+      Whether to start the D-Bus message bus daemon.  It is required
+      by the HAL service.
+    ";
+  }
+
+  
   {
     name = ["installer" "nixpkgsURL"];
     default = "";

upstart-jobs/dbus.nix

@@ -0,0 +1,56 @@
+{stdenv, dbus}:
+
+let
+
+  homeDir = "/var/run/dbus";
+
+  # Take the standard system configuration file, except that we don't
+  # want to fork (Upstart will monitor the daemon).
+  configFile = stdenv.mkDerivation {
+    name = "dbus-conf";
+    buildCommand = "
+      ensureDir $out
+      ensureDir $out/system.d
+      substitute ${dbus}/etc/dbus-1/system.conf $out/system.conf \\
+        --replace '<fork/>' ''
+    ";
+  };
+
+in
+
+{
+  name = "dbus";
+  
+  users = [
+    { name = "messagebus";
+      uid = (import ../system/ids.nix).uids.messagebus;
+      description = "D-Bus system message bus daemon user";
+      home = homeDir;
+    }
+  ];
+  
+  job = "
+description \"D-Bus system message bus daemon\"
+
+start on startup
+stop on shutdown
+
+start script
+
+    mkdir -m 0755 -p ${homeDir}
+    chown messagebus ${homeDir}
+
+    mkdir -m 0755 -p /var/lib/dbus
+    ${dbus}/bin/dbus-uuidgen --ensure
+
+end script
+
+respawn
+
+script
+    rm -f ${homeDir}/pid
+    exec ${dbus}/bin/dbus-daemon --config-file=${configFile}/system.conf
+end script
+  ";
+  
+}

upstart-jobs/default.nix

@@ -182,6 +182,12 @@ import ../upstart-jobs/gather.nix {
       inherit (pkgs) alsaUtils;
     })
 
+  # D-Bus system-wide daemon.
+  ++ optional ["services"  "dbus" "enable"]
+    (import ../upstart-jobs/dbus.nix {
+      inherit (pkgs) stdenv dbus;
+    })
+
   # Handles the reboot/halt events.
   ++ (map
     (event: makeJob (import ../upstart-jobs/halt.nix {