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;;======================================================================
;; Process convience utils
;;======================================================================
(use regex directory-utils)
(declare (unit process))
(declare (uses debugprint))
(import debugprint)
(define (process:conservative-read port)
(let loop ((res ""))
(if (not (eof-object? (peek-char port)))
(loop (conc res (read-char port)))
res)))
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(list result (if normalexit? exitstatus -1))))))))
(define (process:cmd-run-proc-each-line cmd proc . params)
;; (print "Called with cmd=" cmd ", proc=" proc ", params=" params)
(handle-exceptions
exn
(begin
(print "ERROR: Failed to run command: " cmd " " (string-intersperse params " "))
(debug:print 0 *default-log-port* "ERROR: Failed to run command: " cmd " " (string-intersperse params " "))
(debug:print 0 *default-log-port* " message: " ((condition-property-accessor 'exn 'message) exn))
(debug:print 5 *default-log-port* "exn=" (condition->list exn))
#f)
(let-values (((fh fho pid) (if (null? params)
(process cmd)
(process cmd params))))
(let loop ((curr (read-line fh))
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(common:file-exists? (conc "/proc/" pid))
(let-values (((rpid exit-type exit-signal)(process-wait pid #t)))
(and (number? rpid)
(equal? rpid pid)))))
(define (process:alive-on-host? host pid)
(let ((cmd (conc "ssh " host " ps -o pid= -p " pid)))
(common:generic-ssh
cmd
;;
(handle-exceptions
exn
(begin
(debug:print 0 *default-log-port* "failed to identify if process " pid ", on host " host " is alive. exn=" exn)
#f) ;; anything goes wrong - assume the process in NOT running.
(with-input-from-pipe
cmd
(lambda ()
(let loop ((inl (read-line)))
(if (eof-object? inl)
#f
(let* ((clean-str (string-substitute "^[^\\d]*([0-9]+)[^\\d]*$" "\\1" inl))
(innum (string->number clean-str)))
(and innum
(eq? pid innum))))))))))
;; handle-exceptions
;; exn
;; (begin
;; (debug:print 0 *default-log-port* "failed to identify if process " pid ", on host " host " is alive. exn=" exn)
;; #f) ;; anything goes wrong - assume the process in NOT running.
;; (with-input-from-pipe
;; cmd
(lambda ()
(let loop ((inl (read-line)))
(if (eof-object? inl)
#f
(let* ((clean-str (string-substitute "^[^\\d]*([0-9]+)[^\\d]*$" "\\1" inl))
(innum (string->number clean-str)))
(and innum
(eq? pid innum))))))
#f
(lambda ()
(debug:print 0 *default-log-port* "failed to identify if process "
pid", on host "host" is alive. exn="exn)))))
(define (process:get-sub-pids pid)
(with-input-from-pipe
(conc "pstree -A -p " pid) ;; | tr 'a-z\\-+`()\\.' ' ' " pid)
(lambda ()
(let loop ((inl (read-line))
(res '()))
(if (eof-object? inl)
(reverse res)
(let ((nums (map string->number
(string-split-fields "\\d+" inl))))
(loop (read-line)
(append res nums))))))))
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