[1596] Handle in resolver

No tests, it seems this architecture is hardly testable (function in the
main module). Once there are more commands (and there surely will be),
it should be slightly redesigned.

src/bin/resolver/main.cc

@@ -14,18 +14,9 @@
 
 #include <config.h>
 
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <sys/select.h>
-#include <netdb.h>
-#include <netinet/in.h>
-#include <stdlib.h>
-#include <errno.h>
-
-#include <string>
-#include <iostream>
-
-#include <boost/foreach.hpp>
+#include <resolver/spec_config.h>
+#include <resolver/resolver.h>
+#include "resolver_log.h"
 
 #include <asiodns/asiodns.h>
 #include <asiolink/asiolink.h>
@@ -47,15 +38,25 @@
 
 #include <auth/common.h>
 
-#include <resolver/spec_config.h>
-#include <resolver/resolver.h>
-
 #include <cache/resolver_cache.h>
 #include <nsas/nameserver_address_store.h>
 
 #include <log/logger_support.h>
 #include <log/logger_level.h>
-#include "resolver_log.h"
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/select.h>
+#include <netdb.h>
+#include <netinet/in.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <unistd.h>
+
+#include <string>
+#include <iostream>
+
+#include <boost/foreach.hpp>
 
 using namespace std;
 using namespace isc::cc;
@@ -85,6 +86,17 @@ my_command_handler(const string& command, ConstElementPtr args) {
         /* let's add that message to our answer as well */
         answer = createAnswer(0, args);
     } else if (command == "shutdown") {
+        // Is the pid argument provided?
+        if (args && args->getType() ==
+            isc::data::Element::map && args->contains("pid")) {
+            // If it is, we check it is the same as our PID
+            int pid(args->get("pid")->intValue());
+            pid_t my_pid(getpid());
+            if (my_pid != pid) {
+                // It is not for us
+                return (answer);
+            }
+        }
         io_service.stop();
     }
 

src/bin/resolver/resolver.spec.pre.in

@@ -154,7 +154,13 @@
       {
         "command_name": "shutdown",
         "command_description": "Shut down recursive DNS server",
-        "command_args": []
+        "command_args": [
+          {
+            "item_name": "pid",
+            "item_type": "integer",
+            "item_optional": true
+          }
+        ]
       }
     ]
   }