Megatest

	      (db      (sqlite3:open-database fname)))
	  (sqlite3:set-busy-handler! db (make-busy-timeout 136000))
	  (db:set-sync db) ;; (sqlite3:execute db "PRAGMA synchronous = 0;")
	  (if (not file-exists)(initproc db))
	  ;; (release-dot-lock fname)
	  db)
	(begin
	  (debug:print 0 "ERROR: no such db in non-writable dir " fname)
	  (debug:print 2 "WARNING: opening db in non-writable dir " fname)
	  (sqlite3:open-database fname))))) ;; )

;; This routine creates the db. It is only called if the db is not already opened
;; 
(define (db:open-rundb dbstruct run-id #!key (attemptnum 0)(do-not-open #f)) ;;  (conc *toppath* "/megatest.db") (car *configinfo*)))
  (let* ((local  (dbr:dbstruct-get-local dbstruct))
	 (rdb    (if local

  -list-db-targets        : list the target combinations used in the db
  -show-config            : dump the internal representation of the megatest.config file
  -show-runconfig         : dump the internal representation of the runconfigs.config file
  -dumpmode json          : dump in json format instead of sexpr
  -show-cmdinfo           : dump the command info for a test (run in test environment)
  -section sectionName
  -var varName            : for config and runconfig lookup value for sectionName varName
  -since N   : get list of runs changed since time N (Unix seconds)
  -since N                : get list of runs changed since time N (Unix seconds)

Misc 
  -start-dir path         : switch to this directory before running megatest
  -rebuild-db             : bring the database schema up to date
  -cleanup-db             : remove any orphan records, vacuum the db
  -import-megatest.db     : migrate a database from v1.55 series to v1.60 series
  -sync-to-megatest.db    : migrate data back to megatest.db

	(json-write data))
       (else
	(debug:print 0 "ERROR: -dumpmode of " (args:get-arg "-dumpmode") " not recognised")))
      (set! *didsomething* #t)
      (pop-directory)))

(if (args:get-arg "-show-cmdinfo")
    (if (getenv "MT_CMDINFO")
	(let ((data (common:read-encoded-string (getenv "MT_CMDINFO"))))
    (if (or (args:get-arg ":value")(getenv "MT_CMDINFO"))
	(let ((data (common:read-encoded-string (or (args:get-arg ":value")(getenv "MT_CMDINFO")))))
	  (if (equal? (args:get-arg "-dumpmode") "json")
	      (json-write data)
	      (pp data))
	  (set! *didsomething* #t))
	(debug:print-info 0 "environment variable MT_CMDINFO is not set")))

;;======================================================================

(define (tests:check-waiver-eligibility testdat prev-testdat)
  (let* ((test-registry (make-hash-table))
	 (testconfig  (tests:get-testconfig (db:test-get-testname testdat) test-registry #f))
	 (test-rundir ;; (sdb:qry 'passstr 
	  (db:test-get-rundir testdat)) ;; )
	 (prev-rundir ;; (sdb:qry 'passstr 
	  (db:test-get-rundir prev-testdat)) ;; )
	 (waivers     (configf:section-vars testconfig "waivers"))
	 (waivers     (if testconfig (configf:section-vars testconfig "waivers") '()))
	 (waiver-rx   (regexp "^(\\S+)\\s+(.*)$"))
	 (diff-rule   "diff %file1% %file2%")
	 (logpro-rule "diff %file1% %file2% | logpro %waivername%.logpro %waivername%.html"))
    (if (not (file-exists? test-rundir))
	(begin
	  (debug:print 0 "ERROR: test run directory is gone, cannot propagate waiver")
	  #f)