* Support pre-stop scripts. These are needed to cleanly shutdown

daemons such as Apache or PostgreSQL.

svn path=/nixos/branches/upstart-0.6/; revision=18234

modules/services/web-servers/apache-httpd/default.nix

@@ -480,7 +480,14 @@ in
             done
           '';
 
-        exec = "${httpd}/bin/httpd -f ${httpdConf} -DNO_DETACH";
+        daemonType = "fork";
+
+        exec = "${httpd}/bin/httpd -f ${httpdConf}";
+
+        preStop =
+          ''
+            ${httpd}/bin/httpd -f ${httpdConf} -k graceful-stop
+          '';
       };
 
   };

modules/system/upstart/upstart.nix

@@ -72,6 +72,12 @@ let
           ${optionalString job.task "task"}
           ${optionalString job.respawn "respawn"}
 
+          ${optionalString (job.preStop != "") ''
+            pre-stop script
+              ${job.preStop}
+            end script
+          ''}
+
           ${optionalString (job.postStop != "") ''
             post-stop script
               ${job.postStop}
@@ -165,6 +171,16 @@ let
       '';
     };
 
+    preStop = mkOption {
+      type = types.string;
+      default = "";
+      description = ''
+        Shell commands executed before the job is stopped
+        (i.e. before Upstart kills the job's main process).  This can
+        be used to cleanly shut down a daemon.
+      '';
+    };
+
     postStop = mkOption {
       type = types.string;
       default = "";