Megatest

		     (list #f (conc "Login failed due to mismatch paths: " calling-path ", " *toppath*))))))
	  ((logout)
	   (if (and (> (length remparam) 1)
		    (eq? *toppath* (car remparam))
		    (hash-table-ref/default *logged-in-clients* (cadr remparam) #f))
	       #t
	       #f))
	  ((numclients)
	   (length (hash-table-keys *logged-in-clients*)))
	  ((flush)
	   (db:write-cached-data)
	   #t)
	  ((immediate)
	   (db:write-cached-data)
	   (if (not (null? remparam))
	       (apply (car remparam) (cdr remparam))
	       "ERROR"))
	  ((killserver)
	   ;; (db:write-cached-data)
	   (debug:print-info 0 "Remotely killed server on host " (get-host-name) " pid " (current-process-id))
	   (set! *time-to-exit* #t)
	   #t)
	  ((set-verbosity)
	   (set! *verbosity* (caddr params))
	   *verbosity*)
	  ((get-verbosity)

(define (cdb:login zmq-socket keyval signature)
  (cdb:client-call zmq-socket 'login #t keyval signature))

(define (cdb:logout zmq-socket keyval signature)
  (cdb:client-call zmq-socket 'logout #t keyval signature))

(define (cdb:num-clients zmq-socket)
  (cdb:client-call zmq-socket 'numclients #t))

(define (cdb:test-set-status-state zmqsocket test-id status state msg)
  (if msg
      (cdb:client-call zmqsocket 'state-status-msg #t state status msg test-id)
      (cdb:client-call zmqsocket 'state-status #t state status test-id))) ;; run-id test-name item-path minutes cpuload diskfree tmpfree) 

(define (cdb:test-rollup-test_data-pass-fail zmqsocket test-id)
  (cdb:client-call zmqsocket 'test_data-pf-rollup #t test-id test-id test-id test-id))

  -update-meta            : update the tests metadata for all tests
  -env2file fname         : write the environment to fname.csh and fname.sh
  -setvars VAR1=val1,VAR2=val2 : Add environment variables to a run NB// these are
                                 overwritten by values set in config files.
  -server -|hostname      : start the server (reduces contention on megatest.db), use
                            - to automatically figure out hostname
  -listservers            : list the servers 
  -killserver host:port|pid : kill server specified by host:port or pid
  -repl                   : start a repl (useful for extending megatest)

Spreadsheet generation
  -extract-ods fname.ods  : extract an open document spreadsheet from the database
  -pathmod path           : insert path, i.e. path/runame/itempath/logfile.html
                            will clear the field if no rundir/testname/itempath/logfile
                            if it contains forward slashes the path will be converted

      (server:launch)))

(if (or (args:get-arg "-listservers")
	(args:get-arg "-killserver"))
    (let ((tl (setup-for-run)))
      (if tl 
	  (let ((servers (open-run-close tasks:get-all-servers tasks:open-db))
		(fmtstr  "~5a~8a~20a~5a~20a~9a~20a~5a\n")
		(servers-to-kill '()))
	    (format #t fmtstr "Id" "Pid" "Host" "Port" "Time" "Priority" "State" "Num Clients")
	    (format #t fmtstr "==" "===" "====" "====" "====" "========" "=====" "===========")
	    (for-each 
	     (lambda (server)
	       (let* ((killinfo   (args:get-arg "-killserver"))
		      (khost-port (if killinfo (if (substring-index ":" killinfo)(string-split ":") #f) #f))
		      (kpid       (if killinfo (if (substring-index ":" killinfo) #f (string->number killinfo)) #f))
		      (id         (vector-ref server 0))
		      (pid        (vector-ref server 1))
		      (hostname   (vector-ref server 2))
		      (port       (vector-ref server 3))
		      (start-time (vector-ref server 4))
		      (priority   (vector-ref server 5))
		      (state      (vector-ref server 6))
		      (numclients #f)
		      (stat-numc  ;; (handle-exceptions
				  ;;  exn
				  ;;  (list #f (conc "EXCEPTION: " ((condition-property-accessor 'exn 'message) exn)))
				   (let ((zmq-socket (server:client-connect hostname port)))
				     (if zmq-socket
					 (if (server:client-login zmq-socket)
					     (let ((numclients (cdb:num-clients zmq-socket))
						   (killed     #f))
					       (if (and khost-port ;; kill by host/port
							(equal? hostname (car khost-port))
							(equal? port (string->number (cadr khost-port))))
						   (begin
						     (open-run-close tasks:server-deregister tasks:open-db  hostname port: port)
						     (cdb:kill-server zmq-socket)
						     (debug:print-info 1 "Killed server by host:port at " hostname ":" port)
						     (set! killed #t))
						   (if (and kpid
							    (equal? kpid pid))
						       (begin
							 (open-run-close tasks:server-deregister tasks:open-db hostname pid: pid)
							 (set! killed #t)
							 (cdb:kill-server zmq-socket)
							 (debug:print-info 1 "Killed server by pid at " hostname ":" port))))
					       (if (not killed)(server:client-logout zmq-socket))
					       (close-socket  zmq-socket)
					       (list numclients "ACCESSIBLE")) ;; (server:client-logout zmq-socket)
					     (begin
					       (close-socket zmq-socket)
					       (list #f "CAN'T LOGIN")))
					 (list #f "CAN'T CONNECT"))))) ;; )
		 (format #t fmtstr id pid hostname port start-time priority 
			 (cadr stat-numc)(car stat-numc))))
	     servers)
	    (set! *didsomething* #t))))
    ;; if not list or kill then start a client (if appropriate)
    (if (or (let ((res #f))
	      (for-each
	       (lambda (key)
		 (if (args:get-arg key)(set! res #t)))

      (let* ((rawmsg (receive-message zmq-socket))
	     (params (db:string->obj rawmsg)) ;; (with-input-from-string rawmsg (lambda ()(deserialize))))
	     (res    #f))
	(debug:print-info 12 "server=> received params=" params)
	(set! res (cdb:cached-access params))
	(debug:print-info 12 "server=> processed res=" res)
	(send-message zmq-socket (db:obj->string res))
	(if (not *time-to-exit*)
	    (loop)
	    (begin
	      (db:write-cached-data)
	      (open-run-close tasks:server-deregister-self tasks:open-db)
	      (exit)
	      ))))))

;; run server:keep-running in a parallel thread to monitor that the db is being 
;; used and to shutdown after sometime if it is not.
;;
(define (server:keep-running)
  ;; if none running or if > 20 seconds since 
  ;; server last used then start shutdown

(define (tasks:server-register mdb pid hostname port priority state)
  (sqlite3:execute 
   mdb 
   "INSERT OR REPLACE INTO servers (pid,hostname,port,start_time,priority,state) VALUES(?,?,?,strftime('%s','now'),?,?);"
   pid hostname port priority (conc state)))

(define (tasks:server-deregister mdb hostname #!key (port #f)(pid #f))
  (debug:print-info 11 "server-deregister " hostname ", port " port ", pid " pid)
  (if pid
      (sqlite3:execute mdb "DELETE FROM servers WHERE  hostname=? AND pid=?;" hostname pid)
      (if port
	  (sqlite3:execute mdb "DELETE FROM servers WHERE  hostname=? AND port=?;" hostname port)
	  (debug:print 0 "ERROR: tasks:server-deregister called with neither pid nor port specified"))))

(define (tasks:server-deregister-self mdb)