API CHANGE: Add a new "stopupdate" action for the sysadm/update class. (no additional inputs required).

This will look for any currently-running pc-updatemanager processes and kill/stop them as needed.

Example:
{
 "id":"dummy",
 "namespace":"sysadm",
 "name":"update",
 "args": {
    "action":"stopupdate"
 }
}

Output arguments:
"args":{
  "stopupdate":{
    "result":"success" or "error:<error text>"
  }
}

src/server/WebBackend.cpp

@@ -581,6 +581,10 @@ RestOutputStruct::ExitCode WebSocket::EvaluateSysadmUpdateRequest(const QJsonVal
       }else if(act=="startupdate"){
 	ok = true;
 	out->insert("startupdate", sysadm::Update::startUpdate(in_args.toObject()) );
+
+      }else if(act=="stopupdate"){
+	ok = true;
+	out->insert("stopupdate", sysadm::Update::stopUpdate() );
       }
 
     } //end of "action" key usage

src/server/library/sysadm-update.cpp

@@ -190,3 +190,27 @@ QJsonObject Update::startUpdate(QJsonObject jsin) {
   retObject.insert("queueid", ID);
   return retObject;
 }
+
+// Stop an update process
+QJsonObject Update::stopUpdate() {
+  //See if the update is running in the dispatcher
+  QJsonObject ret;
+  QJsonObject cup = DISPATCHER->listJobs();
+  QStringList ids = cup.keys().filter("sysadm_update_runupdates::");
+  if(!ids.isEmpty()){
+    //Found a dispatcher process - go ahead and request that it stop
+    DISPATCHER->killJobs(ids);
+    ret.insert("result","success");
+  }else if( QFile::exists(UP_PIDFILE) ){
+    //See if the process is actually running
+    if( General::RunQuickCommand(QString("pgrep -F ")+UP_PIDFILE) ){
+      //Success if return code == 0
+      int rtc = General::RunQuickCommand( QString("pkill -F ")+UP_PIDFILE );
+      if(rtc==0){ ret.insert("result","success"); }
+      else{ ret.insert("result","error: could not kill update process"); }
+    }
+  }else{
+    ret.insert("result","error: no update processes found");
+  }
+  return ret;
+}

src/server/library/sysadm-update.h

@@ -16,7 +16,10 @@ class Update{
 public:
 	static QJsonObject checkUpdates(bool fast = false);
 	static QJsonObject listBranches();
+	//Start/stop update routine
 	static QJsonObject startUpdate(QJsonObject);
+	static QJsonObject stopUpdate();
+
 };
 	
 } //end of pcbsd namespace