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(currtime (current-seconds)))
(if (> (- currtime lasttime) waitval)
(begin
(hash-table-set! *common:denoise* key currtime)
#t)
#f)))
;; environment vars handy stuff from common.scm
;;
(define getenv get-environment-variable)
(define (safe-setenv key val)
(if (or (substring-index "!" key)
(substring-index ":" key) ;; variables containing : are for internal use and cannot be environment variables.
(substring-index "." key)) ;; periods are not allowed in environment variables
(debug:print-error 4 *default-log-port* "skip setting internal use only variables containing \":\" or starting with \"!\"")
(if (and (string? val)
(string? key))
(handle-exceptions
exn
(debug:print-error 0 *default-log-port* "bad value for setenv, key=" key ", value=" val ", exn=" exn)
(setenv key val))
(debug:print-error 0 *default-log-port* "bad value for setenv, key=" key ", value=" val))))
;;======================================================================
;; accept an alist or hash table containing envvar/env value pairs (value of #f causes unset)
;; execute thunk in context of environment modified as per this list
;; restore env to prior state then return value of eval'd thunk.
;; ** this is not thread safe **
(define (common:with-env-vars delta-env-alist-or-hash-table thunk)
(let* ((delta-env-alist (if (hash-table? delta-env-alist-or-hash-table)
(hash-table->alist delta-env-alist-or-hash-table)
delta-env-alist-or-hash-table))
(restore-thunks
(filter
identity
(map (lambda (env-pair)
(let* ((env-var (car env-pair))
(new-val (let ((tmp (cdr env-pair)))
(if (list? tmp) (car tmp) tmp)))
(current-val (get-environment-variable env-var))
(restore-thunk
(cond
((not current-val) (lambda () (unsetenv env-var)))
((not (string? new-val)) #f)
((eq? current-val new-val) #f)
(else
(lambda () (setenv env-var current-val))))))
;;(when (not (string? new-val))
;; (debug:print 0 *default-log-port* " PROBLEM: not a string: "new-val"\n from env-alist:\n"delta-env-alist)
;; (pp delta-env-alist)
;; (exit 1))
(cond
((not new-val) ;; modify env here
(unsetenv env-var))
((string? new-val)
(setenv env-var new-val)))
restore-thunk))
delta-env-alist))))
(let ((rv (thunk)))
(for-each (lambda (x) (x)) restore-thunks) ;; restore env to original state
rv)))
(define home (getenv "HOME"))
(define user (getenv "USER"))
;;======================================================================
;; return a nice clean pathname made absolute
(define (common:nice-path dir)
(let ((match (string-match "^(~[^\\/]*)(\\/.*|)$" dir)))
(if match ;; using ~ for home?
(common:nice-path (conc (common:read-link-f (cadr match)) "/" (caddr match)))
(normalize-pathname (if (absolute-pathname? dir)
dir
(conc (current-directory) "/" dir))))))
(define (common:read-link-f path)
(handle-exceptions
exn
(begin
(debug:print-error 0 *default-log-port* "command \"/bin/readlink -f " path "\" failed. exn=" exn)
path) ;; just give up
(with-input-from-pipe
(conc "/bin/readlink -f " path)
(lambda ()
(read-line)))))
;; for reasons I don't understand multiple calls to real-path in parallel threads
;; must be protected by mutexes
;;
(define (common:real-path inpath)
;; (process :cmd-run-with-stderr->list "readlink" "-f" inpath)) ;; cmd . params)
;; (let-values
;; (((inp oup pid) (process "readlink" (list "-f" inpath))))
;; (with-input-from-port inp
;; (let loop ((inl (read-line))
;; (res #f))
;; (print "inl=" inl)
;; (if (eof-object? inl)
;; (begin
;; (close-input-port inp)
;; (close-output-port oup)
;; ;; (process-wait pid)
;; res)
;; (loop (read-line) inl))))))
(with-input-from-pipe (conc "readlink -f " inpath) read-line))
;; KEEP THIS ONE
;;
;; client:get-signature
(define *my-client-signature* #f)
(define (client:get-signature)
(if *my-client-signature* *my-client-signature*
(let ((sig (conc (get-host-name) " " (current-process-id))))
(set! *my-client-signature* sig)
*my-client-signature*)))
(define *server-info* #f)
(define *toppath* #f)
(define (common:false-on-exception thunk #!key (message #f))
(handle-exceptions exn
(begin
(if message
(debug:print-info 0 *default-log-port* message))
#f) (thunk) ))
(define (common:file-exists? path-string #!key (silent #f))
;;;; TODO: catch permission denied exceptions and emit appropriate warnings. Might be able to get rid of with chicken 5?
(common:false-on-exception (lambda () (file-exists? path-string))
message: (if (not silent)
(conc "Unable to access path: " path-string)
#f)
))
(define (common:directory-exists? path-string)
;;;; TODO: catch permission denied exceptions and emit appropriate warnings
(common:false-on-exception (lambda () (directory-exists? path-string))
message: (conc "Unable to access path: " path-string)
))
;;======================================================================
;; does the directory exist and do we have write access?
;;
;; returns the directory or #f
;;
(define (common:directory-writable? path-string)
(handle-exceptions
exn
(begin
(debug:print 0 *default-log-port* "Failed to identify access to " path-string ", exn=" exn)
#f)
(if (and (directory-exists? path-string)
(file-write-access? path-string))
path-string
#f)))
;;======================================================================
;; config file utils
;;======================================================================
(define (lookup cfgdat section var)
(if (hash-table? cfgdat)
|