Megatest

                 exn
                 #f
                 (delete-file fullname)))))))
   '()
   "logs"))

;; Force a megatest cleanup-db if version is changed and skip-version-check not specified
;; Do NOT check if not on homehost!
;;
(define (common:exit-on-version-changed)

  (if (common:on-homehost?)
      (if (common:version-changed?)
	  (let* ((mtconf (conc (get-environment-variable "MT_RUN_AREA_HOME") "/megatest.config"))
                (dbfile (conc (get-environment-variable "MT_RUN_AREA_HOME") "/megatest.db"))
                (read-only (not (file-write-access? dbfile)))
                (dbstruct (db:setup)))
	    (debug:print 0 *default-log-port*
			 "WARNING: Version mismatch!\n"
			 "   expected: " (common:version-signature) "\n"

              (debug:print 0 *default-log-port* "   You do not own megatest.db in this area.  Cannot proceed with megatest version migration.")
              (exit 1))
             (read-only
              (debug:print 0 *default-log-port* "   You have read-only access to this area.  Cannot proceed with megatest version migration.")
              (exit 1))
             (else
              (debug:print 0 *default-log-port* " to switch versions you can run: \"megatest -cleanup-db\"")
              (exit 1)))))
      (begin
	(debug:print 0 *default-log-port* "ERROR: cannot migrate version unless on homehost. Exiting.")
	(exit 1))))

;;======================================================================
;; S P A R S E   A R R A Y S
;;======================================================================

(define (make-sparse-array)
  (let ((a (make-sparse-vector)))

(define (assoc/default key lst . default)
  (let ((res (assoc key lst)))
    (if res (cadr res)(if (null? default) #f (car default)))))

(define (common:get-testsuite-name)
  (or (configf:lookup *configdat* "setup" "testsuite" )
      (if (string? *toppath* )
          (pathname-file *toppath*)
          (pathname-file (current-directory)))))

(define (common:get-db-tmp-area)
  (if *db-cache-path*
      *db-cache-path*
      (if *toppath*
	  (let ((dbpath (create-directory (conc "/tmp/" (current-user-name)
						"/megatest_localdb/"
						(common:get-testsuite-name) "/"
						(string-translate *toppath* "/" ".")) #t)))
	    (set! *db-cache-path* dbpath)
	    dbpath)
	  #f)))

(define (common:get-area-path-signature)
  (message-digest-string (md5-primitive) *toppath*))

;;======================================================================
;; E X I T   H A N D L I N G
;;======================================================================

			(delay-loop (+ count 1))))
		  (if (not *time-to-exit*) (loop))))
	    (if (common:low-noise-print 30)
		(debug:print-info 0 *default-log-port* "Exiting watchdog timer, *time-to-exit* = " *time-to-exit*" pid="(current-process-id)" this-wd-num="this-wd-num)))))))

;; TODO: for multiple areas, we will have multiple watchdogs; and multiple threads to manage
(define (common:watchdog)

  (debug:print-info 13 *default-log-port* "common:watchdog entered.")
  (if (common:on-homehost?)
      (let ((dbstruct (db:setup)))
	(debug:print-info 13 *default-log-port* "after db:setup with dbstruct="dbstruct)
	(cond
	 ((dbr:dbstruct-read-only dbstruct)
	  (debug:print-info 13 *default-log-port* "loading read-only watchdog")
	  (common:readonly-watchdog dbstruct))
	 (else
	  (debug:print-info 13 *default-log-port* "loading writable-watchdog.")
	  (common:writable-watchdog dbstruct)))
	(debug:print-info 13 *default-log-port* "watchdog done."))

      (debug:print-info 13 *default-log-port* "no need for watchdog on non-homehost")))


(define (std-exit-procedure)
  (on-exit (lambda () 0))
  ;;(debug:print-info 13 *default-log-port* "std-exit-procedure called; *time-to-exit*="*time-to-exit*)
  (let ((no-hurry  (if *time-to-exit* ;; hurry up
		       #f

;;
(define (common:on-homehost?)
  (let ((hh (common:get-homehost)))
    (if hh
	(cdr hh)
	#f)))

;; do we honor the caches of the config files?
;;
(define (common:use-cache?)
  (not (or (args:get-arg "-no-cache")
	   (and *configdat*
		(equal? (configf:lookup *configdat* "setup" "use-cache") "no")))))

;;======================================================================
;; M I S C   L I S T S
;;======================================================================

;; items in lista are matched value and position in listb
;; return the remaining items in listb or #f
;;