* added uptimed module

svn path=/nixos/trunk/; revision=17173

modules/misc/ids.nix

@@ -47,6 +47,7 @@ in
     gnunetd = 17;
     pulseaudio = 22; # must match `pulseaudio' GID
     gpsd = 23;
+    uptimed = 24;
 
     nixbld = 30000; # start of range of uids
     nobody = 65534;

modules/module-list.nix

@@ -79,6 +79,7 @@
   ./services/scheduling/fcron.nix
   ./services/system/dbus.nix
   ./services/system/nscd.nix
+  ./services/system/uptimed.nix
   ./services/ttys/gpm.nix
   ./services/ttys/mingetty.nix
   ./services/web-servers/apache-httpd/default.nix

modules/services/system/uptimed.nix

@@ -0,0 +1,81 @@
+{pkgs, config, ...}:
+
+let
+
+  inherit (pkgs.lib) mkOption mkIf singleton;
+
+  inherit (pkgs) uptimed;
+
+  stateDir = "/var/spool/uptimed";
+
+  uptimedUser = "uptimed";
+
+  modprobe = config.system.sbin.modprobe;
+
+  uptimedFlags = "";
+
+in
+
+{
+
+  ###### interface
+  
+  options = {
+  
+    services.uptimed = {
+
+      enable = mkOption {
+        default = true;
+        description = ''
+          Uptimed allows you to track your highest uptimes.
+        '';
+      };
+
+    };
+
+  };
+
+
+  ###### implementation
+
+  config = mkIf config.services.uptimed.enable {
+  
+    users.extraUsers = singleton
+      { name = uptimedUser;
+        uid = config.ids.uids.uptimed;
+        description = "Uptimed daemon user";
+        home = stateDir;
+      };
+
+    jobs = singleton {
+
+      name = "uptimed";
+      
+      job = ''
+        description "Uptimed daemon"
+
+        start on startup
+        stop on shutdown
+
+        start script
+
+            mkdir -m 0755 -p ${stateDir}
+            chown ${uptimedUser} ${stateDir}
+
+            # Needed to run uptimed as an unprivileged user.
+            ${modprobe}/sbin/modprobe capability || true
+
+            if ! test -f ${stateDir}/bootid ; then
+              ${uptimed}/sbin/uptimed -b
+            fi
+
+        end script
+
+        respawn ${uptimed}/sbin/uptimed ${uptimedFlags}
+      '';
+
+    };
+    
+  };
+  
+}