| blob | 38163b17e8bc3f47223c074b1bb7e1389790fa34 |
1 ;;; proced.el --- operate on system processes like dired
3 ;; Copyright (C) 2008, 2009 Free Software Foundation, Inc.
5 ;; Author: Roland Winkler <Roland.Winkler@physik.uni-erlangen.de>
6 ;; Keywords: Processes, Unix
8 ;; This file is part of GNU Emacs.
10 ;; GNU Emacs is free software: you can redistribute it and/or modify
11 ;; it under the terms of the GNU General Public License as published by
12 ;; the Free Software Foundation, either version 3 of the License, or
13 ;; (at your option) any later version.
15 ;; GNU Emacs is distributed in the hope that it will be useful,
16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 ;; GNU General Public License for more details.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
23 ;;; Commentary:
25 ;; Proced makes an Emacs buffer containing a listing of the current
26 ;; system processes. You can use the normal Emacs commands to move around
27 ;; in this buffer, and special Proced commands to operate on the processes
28 ;; listed. See `proced-mode' for getting started.
29 ;;
30 ;; To do:
31 ;; - interactive temporary customizability of flags in `proced-grammar-alist'
32 ;; - allow "sudo kill PID", "renice PID"
33 ;;
34 ;; Thoughts and Ideas
35 ;; - Currently, `process-attributes' returns the list of
36 ;; command-line arguments of a process as one concatenated string.
37 ;; This format is compatible with `shell-command'. Also, under
38 ;; MS-Windows, the command-line arguments are actually stored as a
39 ;; single string, so that it is impossible to reverse-engineer it back
40 ;; into separate arguments. Alternatively, `process-attributes'
41 ;; could (try to) return a list of strings that correspond to individual
42 ;; command-line arguments. Then one could feed such a list of
43 ;; command-line arguments into `call-process' or `start-process'.
44 ;; Are there real-world applications when such a feature would be useful?
45 ;; What about something like `proced-restart-pid'?
47 ;;; Code:
52 "Proced mode."
58 "Name of signal function.
59 It can be an elisp function (usually `signal-process') or a string specifying
74 ;; POSIX 1003.1-2001
75 ;; Which systems do not support these signals so that we can
76 ;; exclude them from `proced-signal-list'?
80 "List of signals, used for minibuffer completion."
84 ;; For which attributes can we use a fixed width of the output field?
85 ;; A fixed width speeds up formatting, yet it can make
86 ;; `proced-grammar-alist' system-dependent.
87 ;; (If proced runs like top(1) we want it to be fast.)
88 ;;
89 ;; If it is impossible / unlikely that an attribute has the same value
90 ;; for two processes, then sorting can be based on one ordinary (fast)
91 ;; predicate like `<'. Otherwise, a list of proced predicates can be used
92 ;; to refine the sort.
93 ;;
94 ;; It would be neat if one could temporarily override the following
95 ;; predefined rules.
131 ;;
132 ;; attributes defined by proced (see `proced-process-attributes')
136 ;; process tree
138 "Alist of rules for handling Proced attributes.
140 Each element has the form
142 (KEY NAME FORMAT JUSTIFY PREDICATE REVERSE SORT-SCHEME REFINER).
144 Symbol KEY is the car of a process attribute.
146 String NAME appears in the header line.
148 FORMAT specifies the format for displaying the attribute values. It can
149 be a string passed to `format'. It can be a function called with one
150 argument, the value of the attribute. The value nil means take as is.
152 If JUSTIFY is an integer, its modulus gives the width of the attribute
153 values formatted with FORMAT. If JUSTIFY is positive, NAME appears
154 right-justified, otherwise it appears left-justified. If JUSTIFY is 'left
155 or 'right, the field width is calculated from all field values in the listing.
156 If JUSTIFY is 'left, the field values are formatted left-justified and
157 right-justified otherwise.
159 PREDICATE is the predicate for sorting and filtering the process listing
160 based on attribute KEY. PREDICATE takes two arguments P1 and P2,
161 the corresponding attribute values of two processes. PREDICATE should
162 return 'equal if P1 has same rank like P2. Any other non-nil value says
164 If PREDICATE is nil the attribute cannot be sorted.
166 PREDICATE defines an ascending sort order. REVERSE is non-nil if the sort
167 order is descending.
169 SORT-SCHEME is a list (KEY1 KEY2 ...) defining a hierarchy of rules
170 for sorting the process listing. KEY1, KEY2, ... are KEYs appearing as cars
171 of `proced-grammar-alist'. First the PREDICATE of KEY1 is evaluated.
172 If it yields non-equal, it defines the sort order for the corresponding
173 processes. If it evaluates to 'equal the PREDICATE of KEY2 is evaluated, etc.
175 REFINER can be a list of flags (LESS-B EQUAL-B LARGER-B) used by the command
176 `proced-refine' (see there) to refine the listing based on attribute KEY.
177 This command compares the value of attribute KEY of every process with
178 the value of attribute KEY of the process at the position of point
179 using PREDICATE.
180 If PREDICATE yields non-nil, the process is accepted if LESS-B is non-nil.
181 If PREDICATE yields 'equal, the process is accepted if EQUAL-B is non-nil.
182 If PREDICATE yields nil, the process is accepted if LARGER-B is non-nil.
184 REFINER can also be a list (FUNCTION HELP-ECHO).
185 FUNCTION is called with one argument, the PID of the process at the position
186 of point. The function must return a list of PIDs that is used for the refined
187 listing. HELP-ECHO is a string that is shown when mouse is over this field.
189 If REFINER is nil no refinement is done."
217 "List of functions defining custom attributes.
218 This variable extends the functionality of `proced-process-attributes'.
219 Each function is called with one argument, the list of attributes
220 of a system process. It returns a cons cell of the form (KEY . VALUE)
221 like `process-attributes'. This cons cell is appended to the list
222 returned by `proced-process-attributes'.
223 If the function returns nil, the value is ignored."
227 ;; Formatting and sorting rules are defined "per attribute". If formatting
228 ;; and / or sorting should use more than one attribute, it appears more
229 ;; transparent to define a new derived attribute, so that formatting and
230 ;; sorting can use them consistently. (Are there exceptions to this rule?
231 ;; Would it be advantageous to have yet more general methods available?)
232 ;; Sorting can also be based on attributes that are invisible in the listing.
240 state thcount vsize rss ttname tpgid minflt majflt cminflt cmajflt
242 "Alist of formats of listing.
243 The car of each element is a symbol, the name of the format.
244 The cdr is a list of attribute keys appearing in `proced-grammar-alist'.
245 An element of this list may also be a list of attribute keys that specifies
246 alternatives. If the first attribute is absent for a process, use the second
247 one, etc."
256 "Current format of Proced listing.
257 It can be the car of an element of `proced-format-alist'.
258 It can also be a list of keys appearing in `proced-grammar-alist'."
264 ;; FIXME: is there a better name for filter `user' that does not coincide
265 ;; with an attribute key?
274 "Alist of process filters.
275 The car of each element is a symbol, the name of the filter.
276 The cdr is a list of elementary filters that are applied to every process.
277 A process is displayed if it passes all elementary filters of a selected
278 filter.
280 An elementary filter can be one of the following:
281 \(KEY . REGEXP) If value of attribute KEY matches REGEXP,
282 accept this process.
283 \(KEY . FUN) Apply function FUN to attribute KEY. Accept this process,
284 if FUN returns non-nil.
285 \(function . FUN) For each process, apply function FUN to list of attributes
286 of each. Accept the process if FUN returns non-nil.
287 \(fun-all . FUN) Apply function FUN to entire process list.
288 FUN must return the filtered list."
299 "Current filter of proced listing.
300 It can be the car of an element of `proced-filter-alist'.
301 It can also be a list of elementary filters as in the cdrs of the elements
302 of `proced-filter-alist'."
313 "Current sort scheme for proced listing.
314 It must be the KEY of an element of `proced-grammar-alist'.
315 It can also be a list of KEYs as in the SORT-SCHEMEs of the elements
316 of `proced-grammar-alist'."
323 "Non-nil if proced listing is sorted in descending order."
329 "If non-nil, key of the attribute that defines the `goal-column'."
335 "Time interval in seconds for auto updating Proced buffers."
340 "Non-nil for auto update of a Proced buffer.
341 Can be changed interactively via `proced-toggle-auto-update'."
347 "Non-nil for display of Proced buffer as process tree."
353 "Normal hook run after displaying or updating a Proced buffer.
354 May be used to adapt the window size via `fit-window-to-buffer'."
360 "Normal hook run after sending a signal to processes by `proced-send-signal'.
361 May be used to revert the process listing."
366 ;; Internal variables
372 "Alist of processes displayed by Proced.
373 The car of each element is the PID, and the cdr is a list of
378 "Sort scheme for listing (internal format).
384 ;; Faces and font-lock code taken from dired,
385 ;; but face variables are deprecated for new code.
387 "Faces used by Proced."
393 "Face used for Proced marks."
398 "Face used for marked processes."
403 "Face used for header of attribute used for sorting."
407 "Regexp matching a marked line.
430 "(n)ext, (p)revious, (m)ark, (u)nmark, (k)ill, (q)uit (type ? for more help)"
434 "mouse-1, mouse-2: sort by attribute %s%s (%s)"
438 "mouse-2, RET: refine by attribute %s %s"
444 ;; Processes marked with `proced-marker-char'
445 ;; Should we make sure that only certain attributes are font-locked?
451 ;; moving
459 (define-key km [up] 'previous-line)
460 ;; marking
461 (define-key km "d" 'proced-mark) ; Dired compatibility ("delete")
462 (define-key km "m" 'proced-mark)
463 (define-key km "u" 'proced-unmark)
465 (define-key km "M" 'proced-mark-all)
466 (define-key km "U" 'proced-unmark-all)
467 (define-key km "t" 'proced-toggle-marks)
468 (define-key km "C" 'proced-mark-children)
469 (define-key km "P" 'proced-mark-parents)
470 ;; filtering
471 (define-key km "f" 'proced-filter-interactive)
472 (define-key km [mouse-2] 'proced-refine)
473 (define-key km "\C-m" 'proced-refine)
474 ;; sorting
475 (define-key km "sc" 'proced-sort-pcpu)
476 (define-key km "sm" 'proced-sort-pmem)
477 (define-key km "sp" 'proced-sort-pid)
478 (define-key km "ss" 'proced-sort-start)
479 (define-key km "sS" 'proced-sort-interactive)
480 (define-key km "st" 'proced-sort-time)
481 (define-key km "su" 'proced-sort-user)
482 ;; similar to `Buffer-menu-sort-by-column'
483 (define-key km [header-line mouse-1] 'proced-sort-header)
484 (define-key km [header-line mouse-2] 'proced-sort-header)
485 (define-key km "T" 'proced-toggle-tree)
486 ;; formatting
487 (define-key km "F" 'proced-format-interactive)
488 ;; operate
489 (define-key km "o" 'proced-omit-processes)
490 (define-key km "x" 'proced-send-signal) ; Dired compatibility
491 (define-key km "k" 'proced-send-signal) ; kill processes
492 ;; misc
493 (define-key km "h" 'describe-mode)
494 (define-key km "?" 'proced-help)
495 (define-key km [remap undo] 'proced-undo)
496 (define-key km [remap advertised-undo] 'proced-undo)
497 ;; Additional keybindings are inherited from `special-mode-map'
498 km)
499 "Keymap for Proced commands.")
501 (easy-menu-define
502 proced-menu proced-mode-map "Proced Menu"
503 `("Proced"
504 ["Mark" proced-mark
505 :help "Mark Current Process"]
506 ["Unmark" proced-unmark
507 :help "Unmark Current Process"]
508 ["Mark All" proced-mark-all
509 :help "Mark All Processes"]
510 ["Unmark All" proced-unmark-all
511 :help "Unmark All Process"]
512 ["Toggle Marks" proced-toggle-marks
513 :help "Marked Processes Become Unmarked, and Vice Versa"]
514 ["Mark Children" proced-mark-children
515 :help "Mark Current Process and its Children"]
516 ["Mark Parents" proced-mark-parents
517 :help "Mark Current Process and its Parents"]
518 "--"
519 ("Filters"
520 :help "Select Filter for Process Listing"
521 ,@(mapcar (lambda (el)
522 (let ((filter (car el)))
523 `[,(symbol-name filter)
524 (proced-filter-interactive ',filter)
525 :style radio
526 :selected (eq proced-filter ',filter)]))
527 proced-filter-alist))
528 ("Sorting"
529 :help "Select Sort Scheme"
530 ["Sort..." proced-sort-interactive
531 :help "Sort Process List"]
532 "--"
533 ["Sort by %CPU" proced-sort-pcpu]
534 ["Sort by %MEM" proced-sort-pmem]
535 ["Sort by PID" proced-sort-pid]
536 ["Sort by START" proced-sort-start]
537 ["Sort by TIME" proced-sort-time]
538 ["Sort by USER" proced-sort-user])
539 ("Formats"
540 :help "Select Format for Process Listing"
541 ,@(mapcar (lambda (el)
542 (let ((format (car el)))
543 `[,(symbol-name format)
544 (proced-format-interactive ',format)
545 :style radio
546 :selected (eq proced-format ',format)]))
547 proced-format-alist))
548 ["Tree Display" proced-toggle-tree
549 :style toggle
550 :selected (eval proced-tree-flag)
551 :help "Display Proced Buffer as Process Tree"]
552 "--"
553 ["Omit Marked Processes" proced-omit-processes
554 :help "Omit Marked Processes in Process Listing."]
555 "--"
556 ["Revert" revert-buffer
557 :help "Revert Process Listing"]
558 ["Auto Update" proced-toggle-auto-update
559 :style toggle
560 :selected (eval proced-auto-update-flag)
561 :help "Auto Update of Proced Buffer"]
562 ["Send signal" proced-send-signal
563 :help "Send Signal to Marked Processes"]))
565 ;; helper functions
566 (defun proced-marker-regexp ()
567 "Return regexp matching `proced-marker-char'."
568 ;; `proced-marker-char' must appear in column zero
569 (concat "^" (regexp-quote (char-to-string proced-marker-char))))
571 (defun proced-success-message (action count)
572 "Display success message for ACTION performed for COUNT processes."
573 (message "%s %s process%s" action count (if (= 1 count) "" "es")))
575 ;; Unlike dired, we do not define our own commands for vertical motion.
576 ;; If `goal-column' is set, `next-line' and `previous-line' are fancy
577 ;; commands to satisfy our modest needs. If `proced-goal-attribute'
578 ;; and/or `goal-column' are not set, `next-line' and `previous-line'
579 ;; are really what we need to preserve the column of point.
580 ;; We use `proced-move-to-goal-column' for "non-interactive" cases only
581 ;; to get a well-defined position of point.
583 (defun proced-move-to-goal-column ()
584 "Move to `goal-column' if non-nil. Return position of point."
585 (beginning-of-line)
586 (unless (eobp)
587 (if goal-column
588 (forward-char goal-column)
589 (forward-char 2)))
590 (point))
592 (defun proced-header-line ()
593 "Return header line for Proced buffer."
594 (list (propertize " " 'display '(space :align-to 0))
595 (if (<= (window-hscroll) (length proced-header-line))
596 (replace-regexp-in-string ;; preserve text properties
598 (substring proced-header-line (window-hscroll))))))
600 (defun proced-pid-at-point ()
601 "Return pid of system process at point.
602 Return nil if point is not on a process line."
603 (save-excursion
604 (beginning-of-line)
605 (if (looking-at "^. .")
606 (get-text-property (match-end 0) 'proced-pid))))
608 ;; proced mode
610 (define-derived-mode proced-mode special-mode "Proced"
611 "Mode for displaying UNIX system processes and sending signals to them.
616 The initial content of a listing is defined by the variable `proced-filter'
617 and the variable `proced-format'.
618 The variable `proced-filter' specifies which system processes are displayed.
619 The variable `proced-format' specifies which attributes are displayed for
621 to change the values of `proced-filter' and `proced-format'.
622 The current value of the variable `proced-filter' is indicated in the
623 mode line.
625 The sort order of Proced listings is defined by the variable `proced-sort'.
627 to change the sort scheme. The current sort scheme is indicated in the
631 displayed as process tree.
634 Refining an existing listing does not update the variable `proced-filter'.
636 The attribute-specific rules for formatting, filtering, sorting, and refining
637 are defined in `proced-grammar-alist'.
639 After displaying or updating a Proced buffer, Proced runs the normal hook
640 `proced-post-display-hook'.
643 (abbrev-mode 0)
644 (auto-fill-mode 0)
645 (setq buffer-read-only t
646 truncate-lines t
647 header-line-format '(:eval (proced-header-line)))
648 (add-hook 'post-command-hook 'force-mode-line-update nil t)
649 (set (make-local-variable 'revert-buffer-function) 'proced-revert)
650 (set (make-local-variable 'font-lock-defaults)
651 '(proced-font-lock-keywords t nil nil beginning-of-line))
652 (if (and (not proced-auto-update-timer) proced-auto-update-interval)
653 (setq proced-auto-update-timer
654 (run-at-time t proced-auto-update-interval
655 'proced-auto-update-timer))))
657 ;;;###autoload
658 (defun proced (&optional arg)
659 "Generate a listing of UNIX system processes.
660 If invoked with optional ARG the window displaying the process
661 information will be displayed but not selected.
662 Runs the normal hook `proced-post-display-hook'.
664 See `proced-mode' for a description of features available in Proced buffers."
665 (interactive "P")
666 (unless proced-available
667 (error "Proced is not available on this system"))
668 (let ((buffer (get-buffer-create "*Proced*")) new)
669 (set-buffer buffer)
670 (setq new (zerop (buffer-size)))
671 (when new
672 (proced-mode)
673 ;; `proced-update' runs `proced-post-display-hook' only if the
674 ;; Proced buffer has been selected. Yet the following call of
675 ;; `proced-update' is for an empty Proced buffer that has not
676 ;; yet been selected. Therefore we need to call
677 ;; `proced-post-display-hook' below.
678 (proced-update t))
679 (if arg
680 (progn
681 (display-buffer buffer)
682 (with-current-buffer buffer
683 (run-hooks 'proced-post-display-hook)))
684 (pop-to-buffer buffer)
685 (run-hooks 'proced-post-display-hook)
686 (message
687 (substitute-command-keys
690 (defun proced-auto-update-timer ()
691 "Auto-update Proced buffers using `run-at-time'."
692 (dolist (buf (buffer-list))
693 (with-current-buffer buf
694 (if (and (eq major-mode 'proced-mode)
695 proced-auto-update-flag)
696 (proced-update t t)))))
698 (defun proced-toggle-auto-update (arg)
699 "Change whether this Proced buffer is updated automatically.
700 With prefix ARG, update this buffer automatically if ARG is positive,
701 otherwise do not update. Sets the variable `proced-auto-update-flag'.
702 The time interval for updates is specified via `proced-auto-update-interval'."
703 (interactive (list (or current-prefix-arg 'toggle)))
704 (setq proced-auto-update-flag
705 (cond ((eq arg 'toggle) (not proced-auto-update-flag))
706 (arg (> (prefix-numeric-value arg) 0))
707 (t (not proced-auto-update-flag))))
708 (message "Proced auto update %s"
709 (if proced-auto-update-flag "enabled" "disabled")))
711 ;;; Mark
713 (defun proced-mark (&optional count)
714 "Mark the current (or next COUNT) processes."
715 (interactive "p")
716 (proced-do-mark t count))
718 (defun proced-unmark (&optional count)
719 "Unmark the current (or next COUNT) processes."
720 (interactive "p")
721 (proced-do-mark nil count))
723 (defun proced-unmark-backward (&optional count)
724 "Unmark the previous (or COUNT previous) processes."
725 ;; Analogous to `dired-unmark-backward',
726 ;; but `ibuffer-unmark-backward' behaves different.
727 (interactive "p")
728 (proced-do-mark nil (- (or count 1))))
730 (defun proced-do-mark (mark &optional count)
731 "Mark the current (or next COUNT) processes using MARK."
732 (or count (setq count 1))
733 (let ((backward (< count 0))
734 buffer-read-only)
735 (setq count (1+ (if (<= 0 count) count
736 (min (1- (line-number-at-pos)) (abs count)))))
737 (beginning-of-line)
738 (while (not (or (zerop (setq count (1- count))) (eobp)))
739 (proced-insert-mark mark backward))
740 (proced-move-to-goal-column)))
742 (defun proced-toggle-marks ()
743 "Toggle marks: marked processes become unmarked, and vice versa."
744 (interactive)
745 (let ((mark-re (proced-marker-regexp))
746 buffer-read-only)
747 (save-excursion
748 (goto-char (point-min))
749 (while (not (eobp))
750 (cond ((looking-at mark-re)
751 (proced-insert-mark nil))
752 ((looking-at " ")
753 (proced-insert-mark t))
754 (t
755 (forward-line 1)))))))
757 (defun proced-insert-mark (mark &optional backward)
758 "If MARK is non-nil, insert `proced-marker-char'.
759 If BACKWARD is non-nil, move one line backwards before inserting the mark.
760 Otherwise move one line forward after inserting the mark."
761 (if backward (forward-line -1))
762 (insert (if mark proced-marker-char ?\s))
763 (delete-char 1)
764 (unless backward (forward-line)))
766 (defun proced-mark-all ()
767 "Mark all processes.
768 If `transient-mark-mode' is turned on and the region is active,
769 mark the region."
770 (interactive)
771 (proced-do-mark-all t))
773 (defun proced-unmark-all ()
774 "Unmark all processes.
775 If `transient-mark-mode' is turned on and the region is active,
776 unmark the region."
777 (interactive)
778 (proced-do-mark-all nil))
780 (defun proced-do-mark-all (mark)
781 "Mark all processes using MARK.
782 If `transient-mark-mode' is turned on and the region is active,
783 mark the region."
784 (let* ((count 0)
785 (proced-marker-char (if mark proced-marker-char ?\s))
786 (marker-re (proced-marker-regexp))
787 end buffer-read-only)
788 (save-excursion
789 (if (use-region-p)
790 ;; Operate even on those lines that are only partially a part
791 ;; of region. This appears most consistent with
792 ;; `proced-move-to-goal-column'.
793 (progn (setq end (save-excursion
794 (goto-char (region-end))
795 (unless (looking-at "^") (forward-line))
796 (point)))
797 (goto-char (region-beginning))
798 (unless (looking-at "^") (beginning-of-line)))
799 (goto-char (point-min))
800 (setq end (point-max)))
801 (while (< (point) end)
802 (unless (looking-at marker-re)
803 (setq count (1+ count))
804 (insert proced-marker-char)
805 (delete-char 1))
806 (forward-line))
807 (proced-success-message (if mark "Marked" "Unmarked") count))))
809 (defun proced-mark-children (ppid &optional omit-ppid)
810 "Mark child processes of process PPID.
811 Also mark process PPID unless prefix OMIT-PPID is non-nil."
812 (interactive (list (proced-pid-at-point) current-prefix-arg))
813 (proced-mark-process-alist
814 (proced-filter-children proced-process-alist ppid omit-ppid)))
816 (defun proced-mark-parents (cpid &optional omit-cpid)
817 "Mark parent processes of process CPID.
818 Also mark CPID unless prefix OMIT-CPID is non-nil."
819 (interactive (list (proced-pid-at-point) current-prefix-arg))
820 (proced-mark-process-alist
821 (proced-filter-parents proced-process-alist cpid omit-cpid)))
823 (defun proced-mark-process-alist (process-alist &optional quiet)
824 "Mark processes in PROCESS-ALIST.
825 If QUIET is non-nil suppress status message."
826 (let ((count 0))
827 (if process-alist
828 (let (buffer-read-only)
829 (save-excursion
830 (goto-char (point-min))
831 (while (not (eobp))
832 (when (assq (proced-pid-at-point) process-alist)
833 (insert proced-marker-char)
834 (delete-char 1)
835 (setq count (1+ count)))
836 (forward-line)))))
837 (unless quiet
838 (proced-success-message "Marked" count))))
840 ;; Mostly analog of `dired-do-kill-lines'.
841 ;; However, for negative args the target lines of `dired-do-kill-lines'
842 ;; include the current line, whereas `dired-mark' for negative args operates
843 ;; on the preceding lines. Here we are consistent with `dired-mark'.
844 (defun proced-omit-processes (&optional arg quiet)
845 "Omit marked processes.
846 With prefix ARG, omit that many lines starting with the current line.
847 \(A negative argument omits backward.)
848 If `transient-mark-mode' is turned on and the region is active,
849 omit the processes in region.
850 If QUIET is non-nil suppress status message.
851 Returns count of omitted lines."
852 (interactive "P")
853 (let ((mark-re (proced-marker-regexp))
854 (count 0)
855 buffer-read-only)
856 (cond ((use-region-p) ;; Omit active region
857 (let ((lines (count-lines (region-beginning) (region-end))))
858 (save-excursion
859 (goto-char (region-beginning))
860 (while (< count lines)
861 (proced-omit-process)
862 (setq count (1+ count))))))
863 ((not arg) ;; Omit marked lines
864 (save-excursion
865 (goto-char (point-min))
866 (while (and (not (eobp))
867 (re-search-forward mark-re nil t))
868 (proced-omit-process)
869 (setq count (1+ count)))))
870 ((< 0 arg) ;; Omit forward
871 (while (and (not (eobp)) (< count arg))
872 (proced-omit-process)
873 (setq count (1+ count))))
874 ((< arg 0) ;; Omit backward
875 (while (and (not (bobp)) (< count (- arg)))
876 (forward-line -1)
877 (proced-omit-process)
878 (setq count (1+ count)))))
879 (unless (zerop count) (proced-move-to-goal-column))
880 (unless quiet (proced-success-message "Omitted" count))
881 count))
883 (defun proced-omit-process ()
884 "Omit process from listing point is on.
885 Update `proced-process-alist' accordingly."
886 (setq proced-process-alist
887 (assq-delete-all (proced-pid-at-point) proced-process-alist))
888 (delete-region (line-beginning-position)
889 (save-excursion (forward-line) (point))))
891 ;;; Filtering
893 (defun proced-filter (process-alist filter-list)
894 "Apply FILTER-LIST to PROCESS-ALIST.
895 Return the filtered process list."
896 (if (symbolp filter-list)
897 (setq filter-list (cdr (assq filter-list proced-filter-alist))))
898 (dolist (filter filter-list)
899 (let (new-alist)
900 (cond ( ;; apply function to entire process list
901 (eq (car filter) 'fun-all)
902 (setq new-alist (funcall (cdr filter) process-alist)))
903 ( ;; apply predicate to each list of attributes
904 (eq (car filter) 'function)
905 (dolist (process process-alist)
906 (if (funcall (car filter) (cdr process))
907 (push process new-alist))))
908 (t ;; apply predicate to specified attribute
909 (let ((fun (if (stringp (cdr filter))
910 `(lambda (val)
911 (string-match ,(cdr filter) val))
912 (cdr filter)))
913 value)
914 (dolist (process process-alist)
915 (setq value (cdr (assq (car filter) (cdr process))))
916 (if (and value (funcall fun value))
917 (push process new-alist))))))
918 (setq process-alist new-alist)))
919 process-alist)
921 (defun proced-filter-interactive (scheme)
922 "Filter Proced buffer using SCHEME.
923 When called interactively, an empty string means nil, i.e., no filtering.
924 Set variable `proced-filter' to SCHEME. Revert listing."
925 (interactive
926 (let ((scheme (completing-read "Filter: "
927 proced-filter-alist nil t)))
928 (list (if (string= "" scheme) nil (intern scheme)))))
929 ;; only update if necessary
930 (unless (eq proced-filter scheme)
931 (setq proced-filter scheme)
932 (proced-update t)))
934 (defun proced-filter-parents (process-alist pid &optional omit-pid)
935 "For PROCESS-ALIST return list of parent processes of PID.
936 This list includes PID unless OMIT-PID is non-nil."
937 (let ((parent-list (unless omit-pid (list (assq pid process-alist))))
938 (process (assq pid process-alist))
939 ppid)
940 (while (and (setq ppid (cdr (assq 'ppid (cdr process))))
941 ;; Ignore a PPID that equals PID.
942 (/= ppid pid)
943 ;; Accept only PPIDs that correspond to members in PROCESS-ALIST.
944 (setq process (assq ppid process-alist)))
945 (setq pid ppid)
946 (push process parent-list))
947 parent-list))
949 (defun proced-filter-children (process-alist ppid &optional omit-ppid)
950 "For PROCESS-ALIST return list of child processes of PPID.
951 This list includes PPID unless OMIT-PPID is non-nil."
952 (let ((proced-temp-alist (proced-children-alist process-alist))
953 new-alist)
954 (dolist (pid (proced-children-pids ppid))
955 (push (assq pid process-alist) new-alist))
956 (if omit-ppid
957 (assq-delete-all ppid new-alist)
958 new-alist)))
960 ;;; Process tree
962 (defun proced-children-alist (process-alist)
963 "Return children alist for PROCESS-ALIST.
964 The children alist has elements (PPID PID1 PID2 ...).
965 PPID is a parent PID. PID1, PID2, ... are the child processes of PPID.
966 The children alist inherits the sorting order of PROCESS-ALIST.
967 The list of children does not include grandchildren."
968 ;; The PPIDs inherit the sorting order of PROCESS-ALIST.
969 (let ((process-tree (mapcar (lambda (a) (list (car a))) process-alist))
970 ppid)
971 (dolist (process process-alist)
972 (setq ppid (cdr (assq 'ppid (cdr process))))
973 (if (and ppid
974 ;; Ignore a PPID that equals PID.
975 (/= ppid (car process))
976 ;; Accept only PPIDs that correspond to members in PROCESS-ALIST.
977 (assq ppid process-alist))
978 (let ((temp-alist process-tree) elt)
979 (while (setq elt (pop temp-alist))
980 (when (eq ppid (car elt))
981 (setq temp-alist nil)
982 (setcdr elt (cons (car process) (cdr elt))))))))
983 ;; The child processes inherit the sorting order of PROCESS-ALIST.
984 (setq process-tree
985 (mapcar (lambda (a) (cons (car a) (nreverse (cdr a))))
986 process-tree))))
988 (defun proced-children-pids (ppid)
989 "Return list of children PIDs of PPID (including PPID)."
990 (let ((cpids (cdr (assq ppid proced-temp-alist))))
991 (if cpids
992 (cons ppid (apply 'append (mapcar 'proced-children-pids cpids)))
993 (list ppid))))
995 (defun proced-process-tree (process-alist)
996 "Return process tree for PROCESS-ALIST.
997 It is an alist of alists where the car of each alist is a parent process
998 and the cdr is a list of child processes according to the ppid attribute
999 of these processes.
1000 The process tree inherits the sorting order of PROCESS-ALIST."
1001 (let ((proced-temp-alist (proced-children-alist process-alist))
1002 pid-alist proced-process-tree)
1003 (while (setq pid-alist (pop proced-temp-alist))
1004 (push (proced-process-tree-internal pid-alist) proced-process-tree))
1005 (nreverse proced-process-tree)))
1007 (defun proced-process-tree-internal (pid-alist)
1008 "Helper function for `proced-process-tree'."
1009 (let ((cpid-list (cdr pid-alist)) cpid-alist cpid)
1010 (while (setq cpid (car cpid-list))
1011 (if (setq cpid-alist (assq cpid proced-temp-alist))
1012 ;; Unprocessed part of process tree that needs to be
1013 ;; analyzed recursively.
1014 (progn
1015 (setq proced-temp-alist
1016 (assq-delete-all cpid proced-temp-alist))
1017 (setcar cpid-list (proced-process-tree-internal cpid-alist)))
1018 ;; We already processed this subtree and take it "as is".
1019 (setcar cpid-list (assq cpid proced-process-tree))
1020 (setq proced-process-tree
1021 (assq-delete-all cpid proced-process-tree)))
1022 (pop cpid-list)))
1023 pid-alist)
1025 (defun proced-toggle-tree (arg)
1026 "Toggle the display of the process listing as process tree.
1027 With prefix ARG, display as process tree if ARG is positive, otherwise
1028 do not display as process tree. Sets the variable `proced-tree-flag'.
1030 The process tree is generated from the selected processes in the
1031 Proced buffer (that is, the processes in `proced-process-alist').
1032 All processes that do not have a parent process in this list
1033 according to their ppid attribute become the root of a process tree.
1034 Each parent process is followed by its child processes.
1035 The process tree inherits the chosen sorting order of the process listing,
1036 that is, child processes of the same parent process are sorted using
1037 the selected sorting order."
1038 (interactive (list (or current-prefix-arg 'toggle)))
1039 (setq proced-tree-flag
1040 (cond ((eq arg 'toggle) (not proced-tree-flag))
1041 (arg (> (prefix-numeric-value arg) 0))
1042 (t (not proced-tree-flag))))
1043 (proced-update)
1044 (message "Proced process tree display %s"
1045 (if proced-tree-flag "enabled" "disabled")))
1047 (defun proced-tree (process-alist)
1048 "Rearrange PROCESS-ALIST as process tree.
1049 If `proced-tree-flag' is non-nil, rearrange PROCESS-ALIST such that
1050 every processes is followed by its child processes. Each process
1051 gets a tree attribute that specifies the depth of the process in the tree.
1052 A root process is a process with no parent within PROCESS-ALIST according
1053 to its value of the ppid attribute. It has depth 0.
1055 If `proced-tree-flag' is nil, remove the tree attribute.
1056 Return the rearranged process list."
1057 (if proced-tree-flag
1058 ;; add tree attribute
1059 (let ((process-tree (proced-process-tree process-alist))
1060 (proced-tree-depth 0)
1061 (proced-temp-alist process-alist)
1062 proced-process-tree pt)
1063 (while (setq pt (pop process-tree))
1064 (proced-tree-insert pt))
1065 (nreverse proced-process-tree))
1066 ;; remove tree attribute
1067 (let ((process-alist process-alist))
1068 (while process-alist
1069 (setcar process-alist
1070 (assq-delete-all 'tree (car process-alist)))
1071 (pop process-alist)))
1072 process-alist))
1074 (defun proced-tree-insert (process-tree)
1075 "Helper function for `proced-tree'."
1076 (let ((pprocess (assq (car process-tree) proced-temp-alist)))
1077 (push (append (list (car pprocess))
1078 (list (cons 'tree proced-tree-depth))
1079 (cdr pprocess))
1080 proced-process-tree)
1081 (if (cdr process-tree)
1082 (let ((proced-tree-depth (1+ proced-tree-depth)))
1083 (mapc 'proced-tree-insert (cdr process-tree))))))
1085 ;; Refining
1087 ;; Filters are used to select the processes in a new listing.
1088 ;; Refiners are used to narrow down further (interactively) the processes
1089 ;; in an existing listing.
1091 (defun proced-refine (&optional event)
1092 "Refine Proced listing by comparing with the attribute value at point.
1093 Optional EVENT is the location of the Proced field.
1095 Refinement is controlled by the REFINER defined for each attribute ATTR
1096 in `proced-grammar-alist'.
1098 If REFINER is a list of flags and point is on a process's value of ATTR,
1099 this command compares the value of ATTR of every process with the value
1100 of ATTR of the process at the position of point.
1102 The predicate for the comparison of two ATTR values is defined
1103 in `proced-grammar-alist'. For each return value of the predicate
1104 a refine flag is defined in `proced-grammar-alist'. One can select
1107 is included in the new listing if the refine flag for the corresponding
1108 return value of the predicate is non-nil.
1110 the current values of these refine flags.
1112 If REFINER is a cons pair (FUNCTION . HELP-ECHO), FUNCTION is called
1113 with one argument, the PID of the process at the position of point.
1114 The function must return a list of PIDs that is used for the refined
1115 listing. HELP-ECHO is a string that is shown when mouse is over this field.
1117 This command refines an already existing process listing generated initially
1118 based on the value of the variable `proced-filter'. It does not change
1119 this variable. It does not revert the listing. If you frequently need
1120 a certain refinement, consider defining a new filter in `proced-filter-alist'."
1121 (interactive (list last-input-event))
1122 (if event (posn-set-point (event-end event)))
1123 (let ((key (get-text-property (point) 'proced-key))
1124 (pid (get-text-property (point) 'proced-pid)))
1125 (if (and key pid)
1126 (let* ((grammar (assq key proced-grammar-alist))
1127 (refiner (nth 7 grammar)))
1128 (when refiner
1129 (cond ((functionp (car refiner))
1130 (setq proced-process-alist (funcall (car refiner) pid)))
1131 ((consp refiner)
1132 (let ((predicate (nth 4 grammar))
1133 (ref (cdr (assq key (cdr (assq pid proced-process-alist)))))
1134 val new-alist)
1135 (dolist (process proced-process-alist)
1136 (setq val (funcall predicate (cdr (assq key (cdr process))) ref))
1137 (if (cond ((not val) (nth 2 refiner))
1138 ((eq val 'equal) (nth 1 refiner))
1139 (val (car refiner)))
1140 (push process new-alist)))
1141 (setq proced-process-alist new-alist))))
1142 ;; Do not revert listing.
1143 (proced-update)))
1144 (message "No refiner defined here."))))
1146 ;; Proced predicates for sorting and filtering are based on a three-valued
1147 ;; logic:
1148 ;; Predicates take two arguments P1 and P2, the corresponding attribute
1149 ;; values of two processes. Predicates should return 'equal if P1 has
1150 ;; same rank like P2. Any other non-nil value says that P1 is "less than" P2,
1151 ;; or nil if not.
1153 (defun proced-< (num1 num2)
1154 "Return t if NUM1 less than NUM2.
1155 Return `equal' if NUM1 equals NUM2. Return nil if NUM1 greater than NUM2."
1156 (if (= num1 num2)
1157 'equal
1158 (< num1 num2)))
1160 (defun proced-string-lessp (s1 s2)
1161 "Return t if string S1 is less than S2 in lexicographic order.
1162 Return `equal' if S1 and S2 have identical contents.
1163 Return nil otherwise."
1164 (if (string= s1 s2)
1165 'equal
1166 (string-lessp s1 s2)))
1168 (defun proced-time-lessp (t1 t2)
1169 "Return t if time value T1 is less than time value T2.
1170 Return `equal' if T1 equals T2. Return nil otherwise."
1171 (with-decoded-time-value ((high1 low1 micro1 t1)
1172 (high2 low2 micro2 t2))
1173 (cond ((< high1 high2))
1174 ((< high2 high1) nil)
1175 ((< low1 low2))
1176 ((< low2 low1) nil)
1177 ((< micro1 micro2))
1178 ((< micro2 micro1) nil)
1179 (t 'equal))))
1181 ;;; Sorting
1183 (defsubst proced-xor (b1 b2)
1184 "Return the logical exclusive or of args B1 and B2."
1185 (and (or b1 b2)
1186 (not (and b1 b2))))
1188 (defun proced-sort-p (p1 p2)
1189 "Predicate for sorting processes P1 and P2."
1190 (if (not (cdr proced-sort-internal))
1191 ;; only one predicate: fast scheme
1192 (let* ((sorter (car proced-sort-internal))
1193 (k1 (cdr (assq (car sorter) (cdr p1))))
1194 (k2 (cdr (assq (car sorter) (cdr p2)))))
1195 ;; if the attributes are undefined, we should really abort sorting
1196 (if (and k1 k2)
1197 (proced-xor (funcall (nth 1 sorter) k1 k2)
1198 (nth 2 sorter))))
1199 (let ((sort-list proced-sort-internal) sorter predicate k1 k2)
1200 (catch 'done
1201 (while (setq sorter (pop sort-list))
1202 (setq k1 (cdr (assq (car sorter) (cdr p1)))
1203 k2 (cdr (assq (car sorter) (cdr p2)))
1204 predicate
1205 (if (and k1 k2)
1206 (funcall (nth 1 sorter) k1 k2)))
1207 (if (not (eq predicate 'equal))
1208 (throw 'done (proced-xor predicate (nth 2 sorter)))))
1209 (eq t predicate)))))
1211 (defun proced-sort (process-alist sorter descend)
1212 "Sort PROCESS-ALIST using scheme SORTER.
1213 SORTER is a scheme like `proced-sort'.
1214 DESCEND is non-nil if the first element of SORTER is sorted
1215 in descending order.
1216 Return the sorted process list."
1217 ;; translate SORTER into a list of lists (KEY PREDICATE REVERSE)
1218 (setq proced-sort-internal
1219 (mapcar (lambda (arg)
1220 (let ((grammar (assq arg proced-grammar-alist)))
1221 (unless (nth 4 grammar)
1222 (error "Attribute %s not sortable" (car grammar)))
1223 (list arg (nth 4 grammar) (nth 5 grammar))))
1224 (cond ((listp sorter) sorter)
1225 ((and (symbolp sorter)
1226 (nth 6 (assq sorter proced-grammar-alist))))
1227 ((symbolp sorter) (list sorter))
1228 (t (error "Sorter undefined %s" sorter)))))
1229 (if proced-sort-internal
1230 (progn
1231 ;; splice DESCEND into the list
1232 (setcar proced-sort-internal
1233 (list (caar proced-sort-internal)
1234 (nth 1 (car proced-sort-internal)) descend))
1235 (sort process-alist 'proced-sort-p))
1236 process-alist))
1238 (defun proced-sort-interactive (scheme &optional arg)
1239 "Sort Proced buffer using SCHEME.
1240 When called interactively, an empty string means nil, i.e., no sorting.
1242 Prefix ARG controls sort order:
1243 - If prefix ARG is positive (negative), sort in ascending (descending) order.
1244 - If ARG is nil or 'no-arg and SCHEME is equal to the previous sorting scheme,
1245 reverse the sorting order.
1246 - If ARG is nil or 'no-arg and SCHEME differs from the previous sorting scheme,
1247 adopt the sorting order defined for SCHEME in `proced-grammar-alist'.
1249 Set variable `proced-sort' to SCHEME. The current sort scheme is displayed
1251 (interactive
1252 (let* (choices
1253 (scheme (completing-read "Sort attribute: "
1254 (dolist (grammar proced-grammar-alist choices)
1255 (if (nth 4 grammar)
1256 (push (list (car grammar)) choices)))
1257 nil t)))
1258 (list (if (string= "" scheme) nil (intern scheme))
1259 ;; like 'toggle in `define-derived-mode'
1260 (or current-prefix-arg 'no-arg))))
1262 (setq proced-descend
1263 ;; If `proced-sort-interactive' is called repeatedly for the same
1264 ;; sort key, the sort order is reversed.
1265 (cond ((and (eq arg 'no-arg) (equal proced-sort scheme))
1266 (not proced-descend))
1267 ((eq arg 'no-arg)
1268 (nth 5 (assq (if (consp scheme) (car scheme) scheme)
1269 proced-grammar-alist)))
1270 (arg (< (prefix-numeric-value arg) 0))
1271 ((equal proced-sort scheme)
1272 (not proced-descend))
1273 (t (nth 5 (assq (if (consp scheme) (car scheme) scheme)
1274 proced-grammar-alist))))
1275 proced-sort scheme)
1276 (proced-update))
1278 (defun proced-sort-pcpu (&optional arg)
1279 "Sort Proced buffer by percentage CPU time (%CPU).
1280 Prefix ARG controls sort order, see `proced-sort-interactive'."
1281 (interactive (list (or current-prefix-arg 'no-arg)))
1282 (proced-sort-interactive 'pcpu arg))
1284 (defun proced-sort-pmem (&optional arg)
1285 "Sort Proced buffer by percentage memory usage (%MEM).
1286 Prefix ARG controls sort order, see `proced-sort-interactive'."
1287 (interactive (list (or current-prefix-arg 'no-arg)))
1288 (proced-sort-interactive 'pmem arg))
1290 (defun proced-sort-pid (&optional arg)
1291 "Sort Proced buffer by PID.
1292 Prefix ARG controls sort order, see `proced-sort-interactive'."
1293 (interactive (list (or current-prefix-arg 'no-arg)))
1294 (proced-sort-interactive 'pid arg))
1296 (defun proced-sort-start (&optional arg)
1297 "Sort Proced buffer by time the command started (START).
1298 Prefix ARG controls sort order, see `proced-sort-interactive'."
1299 (interactive (list (or current-prefix-arg 'no-arg)))
1300 (proced-sort-interactive 'start arg))
1302 (defun proced-sort-time (&optional arg)
1303 "Sort Proced buffer by CPU time (TIME).
1304 Prefix ARG controls sort order, see `proced-sort-interactive'."
1305 (interactive (list (or current-prefix-arg 'no-arg)))
1306 (proced-sort-interactive 'time arg))
1308 (defun proced-sort-user (&optional arg)
1309 "Sort Proced buffer by USER.
1310 Prefix ARG controls sort order, see `proced-sort-interactive'."
1311 (interactive (list (or current-prefix-arg 'no-arg)))
1312 (proced-sort-interactive 'user arg))
1314 (defun proced-sort-header (event &optional arg)
1315 "Sort Proced listing based on an attribute.
1316 EVENT is a mouse event with starting position in the header line.
1317 It is converted to the corresponding attribute key.
1318 This command updates the variable `proced-sort'.
1319 Prefix ARG controls sort order, see `proced-sort-interactive'."
1320 (interactive (list last-input-event (or last-prefix-arg 'no-arg)))
1321 (let ((start (event-start event))
1322 col key)
1323 (save-selected-window
1324 (select-window (posn-window start))
1325 (setq col (+ (1- (car (posn-actual-col-row start)))
1326 (window-hscroll)))
1327 (when (and (<= 0 col) (< col (length proced-header-line)))
1328 (setq key (get-text-property col 'proced-key proced-header-line))
1329 (if key
1330 (proced-sort-interactive key arg)
1331 (message "No sorter defined here."))))))
1333 ;;; Formating
1335 (defun proced-format-time (time)
1336 "Format time interval TIME."
1337 (let* ((ftime (float-time time))
1338 (days (truncate ftime 86400))
1339 (ftime (mod ftime 86400))
1340 (hours (truncate ftime 3600))
1341 (ftime (mod ftime 3600))
1342 (minutes (truncate ftime 60))
1343 (seconds (mod ftime 60)))
1344 (cond ((< 0 days)
1345 (format "%d-%02d:%02d:%02d" days hours minutes seconds))
1346 ((< 0 hours)
1347 (format "%02d:%02d:%02d" hours minutes seconds))
1348 (t
1349 (format "%02d:%02d" minutes seconds)))))
1351 (defun proced-format-start (start)
1352 "Format time START.
1353 The return string is always 6 characters wide."
1354 (let ((d-start (decode-time start))
1355 (d-current (decode-time)))
1356 (cond ( ;; process started in previous years
1357 (< (nth 5 d-start) (nth 5 d-current))
1358 (format-time-string " %Y" start))
1359 ;; process started today
1360 ((and (= (nth 3 d-start) (nth 3 d-current))
1361 (= (nth 4 d-start) (nth 4 d-current)))
1362 (format-time-string " %H:%M" start))
1363 (t ;; process started this year
1364 (format-time-string "%b %e" start)))))
1366 (defun proced-format-ttname (ttname)
1368 ;; Does this work for all systems?
1370 (match-end 0) 0)))
1372 (defun proced-format-tree (tree)
1373 "Format attribute TREE."
1374 (concat (make-string tree ?\s) (number-to-string tree)))
1376 ;; Proced assumes that every process occupies only one line in the listing.
1377 (defun proced-format-args (args)
1378 "Format attribute ARGS.
1382 (defun proced-format (process-alist format)
1383 "Display PROCESS-ALIST using FORMAT."
1384 (if (symbolp format)
1385 (setq format (cdr (assq format proced-format-alist))))
1387 ;; Not all systems give us all attributes. We take `emacs-pid' as a
1388 ;; representative process PID. If FORMAT contains a list of alternative
1389 ;; attributes, we take the first attribute that is non-nil for `emacs-pid'.
1390 ;; If none of the alternatives is non-nil, the attribute is ignored
1391 ;; in the listing.
1392 (let ((standard-attributes
1393 (car (proced-process-attributes (list (emacs-pid)))))
1394 new-format fmi)
1395 (if (and proced-tree-flag
1396 (assq 'ppid standard-attributes))
1397 (push (cons 'tree 0) standard-attributes))
1398 (dolist (fmt format)
1399 (if (symbolp fmt)
1400 (if (assq fmt standard-attributes)
1401 (push fmt new-format))
1402 (while (setq fmi (pop fmt))
1403 (when (assq fmi standard-attributes)
1404 (push fmi new-format)
1405 (setq fmt nil)))))
1406 (setq format (nreverse new-format)))
1409 (let ((whitespace " ") (unknown "?")
1410 (sort-key (if (consp proced-sort) (car proced-sort) proced-sort))
1411 header-list grammar)
1412 ;; Loop over all attributes
1413 (while (setq grammar (assq (pop format) proced-grammar-alist))
1414 (let* ((key (car grammar))
1415 (fun (cond ((stringp (nth 2 grammar))
1416 `(lambda (arg) (format ,(nth 2 grammar) arg)))
1417 ((not (nth 2 grammar)) 'identity)
1418 ( t (nth 2 grammar))))
1419 (whitespace (if format whitespace ""))
1420 ;; Text properties:
1421 ;; We use the text property `proced-key' to store in each
1422 ;; field the corresponding key.
1423 ;; Of course, the sort predicate appearing in help-echo
1424 ;; is only part of the story. But it gives the main idea.
1425 (hprops
1426 (if (nth 4 grammar)
1427 (let ((descend (if (eq key sort-key) proced-descend (nth 5 grammar))))
1428 `(proced-key ,key mouse-face highlight
1429 help-echo ,(format proced-header-help-echo
1430 (if descend "-" "+")
1431 (nth 1 grammar)
1432 (if descend "descending" "ascending"))))))
1433 (refiner (nth 7 grammar))
1434 (fprops
1435 (cond ((functionp (car refiner))
1436 `(proced-key ,key mouse-face highlight
1437 help-echo ,(format "mouse-2, RET: %s"
1438 (nth 1 refiner))))
1439 ((consp refiner)
1440 `(proced-key ,key mouse-face highlight
1441 help-echo ,(format "mouse-2, RET: refine by attribute %s %s"
1442 (nth 1 grammar)
1443 (mapconcat (lambda (s)
1444 (if s "+" "-"))
1445 refiner ""))))))
1446 value)
1448 ;; highlight the header of the sort column
1449 (if (eq key sort-key)
1450 (setq hprops (append '(face proced-sort-header) hprops)))
1451 (goto-char (point-min))
1452 (cond ( ;; fixed width of output field
1453 (numberp (nth 3 grammar))
1454 (dolist (process process-alist)
1455 (end-of-line)
1456 (setq value (cdr (assq key (cdr process))))
1457 (insert (if value
1458 (apply 'propertize (funcall fun value) fprops)
1459 (format (concat "%" (number-to-string (nth 3 grammar)) "s")
1460 unknown))
1461 whitespace)
1462 (forward-line))
1463 (push (format (concat "%" (number-to-string (nth 3 grammar)) "s")
1464 (apply 'propertize (nth 1 grammar) hprops))
1465 header-list))
1467 ( ;; last field left-justified
1468 (and (not format) (eq 'left (nth 3 grammar)))
1469 (dolist (process process-alist)
1470 (end-of-line)
1471 (setq value (cdr (assq key (cdr process))))
1472 (insert (if value (apply 'propertize (funcall fun value) fprops)
1473 unknown))
1474 (forward-line))
1475 (push (apply 'propertize (nth 1 grammar) hprops) header-list))
1477 (t ;; calculated field width
1478 (let ((width (length (nth 1 grammar)))
1479 field-list value)
1480 (dolist (process process-alist)
1481 (setq value (cdr (assq key (cdr process))))
1482 (if value
1483 (setq value (apply 'propertize (funcall fun value) fprops)
1484 width (max width (length value))
1485 field-list (cons value field-list))
1486 (push unknown field-list)
1487 (setq width (max width (length unknown)))))
1488 (let ((afmt (concat "%" (if (eq 'left (nth 3 grammar)) "-" "")
1489 (number-to-string width) "s")))
1490 (push (format afmt (apply 'propertize (nth 1 grammar) hprops))
1491 header-list)
1492 (dolist (value (nreverse field-list))
1493 (end-of-line)
1494 (insert (format afmt value) whitespace)
1495 (forward-line))))))))
1497 ;; final cleanup
1498 (goto-char (point-min))
1499 (dolist (process process-alist)
1500 ;; We use the text property `proced-pid' to store in each line
1501 ;; the corresponding pid
1502 (put-text-property (point) (line-end-position) 'proced-pid (car process))
1503 (forward-line))
1504 ;; Set header line
1505 (setq proced-header-line
1506 (mapconcat 'identity (nreverse header-list) whitespace))
1508 (setq proced-header-line (substring proced-header-line 0
1509 (match-beginning 0))))
1510 ;; (delete-trailing-whitespace)
1511 (goto-char (point-min))
1513 (delete-region (match-beginning 0) (match-end 0)))))
1515 (defun proced-format-interactive (scheme &optional revert)
1516 "Format Proced buffer using SCHEME.
1517 When called interactively, an empty string means nil, i.e., no formatting.
1518 Set variable `proced-format' to SCHEME.
1519 With prefix REVERT non-nil revert listing."
1520 (interactive
1521 (let ((scheme (completing-read "Format: "
1522 proced-format-alist nil t)))
1523 (list (if (string= "" scheme) nil (intern scheme))
1524 current-prefix-arg)))
1525 ;; only update if necessary
1526 (when (or (not (eq proced-format scheme)) revert)
1527 (setq proced-format scheme)
1528 (proced-update revert)))
1530 ;; generate listing
1532 (defun proced-process-attributes (&optional pid-list)
1533 "Return alist of attributes for each system process.
1534 This alist can be customized via `proced-custom-attributes'.
1535 Optional arg PID-LIST is a list of PIDs of system process that are analyzed.
1536 If no attributes are known for a process (possibly because it already died)
1537 the process is ignored."
1538 ;; Should we make it customizable whether processes with empty attribute
1539 ;; lists are ignored? When would such processes be of interest?
1540 (let (process-alist attributes attr)
1541 (dolist (pid (or pid-list (list-system-processes)) process-alist)
1542 (when (setq attributes (process-attributes pid))
1543 (setq attributes (cons (cons 'pid pid) attributes))
1544 (dolist (fun proced-custom-attributes)
1545 (if (setq attr (funcall fun attributes))
1546 (push attr attributes)))
1547 (push (cons pid attributes) process-alist)))))
1549 (defun proced-update (&optional revert quiet)
1550 "Update the Proced process information. Preserves point and marks.
1551 With prefix REVERT non-nil, revert listing.
1552 Suppress status information if QUIET is nil.
1553 After updating a displayed Proced buffer run the normal hook
1554 `proced-post-display-hook'."
1555 ;; This is the main function that generates and updates the process listing.
1556 (interactive "P")
1557 (setq revert (or revert (not proced-process-alist)))
1558 (or quiet (message (if revert "Updating process information..."
1559 "Updating process display...")))
1560 (if revert ;; evaluate all processes
1561 (setq proced-process-alist (proced-process-attributes)))
1562 ;; filtering and sorting
1563 (setq proced-process-alist
1564 (proced-sort (proced-filter proced-process-alist proced-filter)
1565 proced-sort proced-descend))
1567 ;; display as process tree?
1568 (setq proced-process-alist
1569 (proced-tree proced-process-alist))
1571 ;; It is useless to keep undo information if we revert, filter, or
1572 ;; refine the listing so that `proced-process-alist' has changed.
1573 ;; We could keep the undo information if we only re-sort the buffer.
1574 ;; Would that be useful? Re-re-sorting is easy, too.
1575 (if (consp buffer-undo-list)
1576 (setq buffer-undo-list nil))
1577 (let ((buffer-undo-list t)
1578 ;; If point is on a field, we try to return point to that field.
1579 ;; Otherwise we try to return to the same column
1580 (old-pos (let ((pid (proced-pid-at-point))
1581 (key (get-text-property (point) 'proced-key)))
1582 (list pid key ; can both be nil
1583 (if key
1584 (if (get-text-property (1- (point)) 'proced-key)
1585 (- (point) (previous-single-property-change
1586 (point) 'proced-key))
1587 0)
1588 (current-column)))))
1589 buffer-read-only mp-list)
1590 ;; remember marked processes (whatever the mark was)
1591 (goto-char (point-min))
1593 (push (cons (save-match-data (proced-pid-at-point))
1594 (match-string-no-properties 1)) mp-list))
1596 ;; generate listing
1597 (erase-buffer)
1598 (proced-format proced-process-alist proced-format)
1599 (goto-char (point-min))
1600 (while (not (eobp))
1601 (insert " ")
1602 (forward-line))
1603 (setq proced-header-line (concat " " proced-header-line))
1604 (if revert (set-buffer-modified-p nil))
1606 ;; set `goal-column'
1607 (let ((grammar (assq proced-goal-attribute proced-grammar-alist)))
1608 (setq goal-column ;; set to nil if no match
1609 (if (and grammar
1610 (not (zerop (buffer-size)))
1611 (string-match (regexp-quote (nth 1 grammar))
1612 proced-header-line))
1613 (if (nth 3 grammar)
1614 (match-beginning 0)
1615 (match-end 0)))))
1617 ;; Restore process marks and buffer position (if possible).
1618 ;; Sometimes this puts point in the middle of the proced buffer
1619 ;; where it is not interesting. Is there a better / more flexible solution?
1620 (goto-char (point-min))
1621 (let (pid mark new-pos)
1622 (if (or mp-list (car old-pos))
1623 (while (not (eobp))
1624 (setq pid (proced-pid-at-point))
1625 (when (setq mark (assq pid mp-list))
1626 (insert (cdr mark))
1627 (delete-char 1)
1628 (beginning-of-line))
1629 (when (eq (car old-pos) pid)
1630 (if (nth 1 old-pos)
1631 (let ((limit (line-end-position)) pos)
1632 (while (and (not new-pos)
1633 (setq pos (next-property-change (point) nil limit)))
1634 (goto-char pos)
1635 (when (eq (nth 1 old-pos)
1636 (get-text-property (point) 'proced-key))
1637 (forward-char (min (nth 2 old-pos)
1638 (- (next-property-change (point))
1639 (point))))
1640 (setq new-pos (point))))
1641 (unless new-pos
1642 ;; we found the process, but the field of point
1643 ;; is not listed anymore
1644 (setq new-pos (proced-move-to-goal-column))))
1645 (setq new-pos (min (+ (line-beginning-position) (nth 2 old-pos))
1646 (line-end-position)))))
1647 (forward-line)))
1648 (if new-pos
1649 (goto-char new-pos)
1650 (goto-char (point-min))
1651 (proced-move-to-goal-column)))
1652 ;; update modeline
1653 ;; Does the long `mode-name' clutter the modeline? It would be nice
1654 ;; to have some other location for displaying the values of the various
1655 ;; flags that affect the behavior of proced (flags one might want
1656 ;; to change on the fly). Where??
1657 (setq mode-name
1658 (concat "Proced"
1659 (if proced-filter
1660 (concat ": " (symbol-name proced-filter))
1661 "")
1662 (if proced-sort
1663 (let* ((key (if (consp proced-sort) (car proced-sort)
1664 proced-sort))
1665 (grammar (assq key proced-grammar-alist)))
1666 (concat " by " (if proced-descend "-" "+")
1667 (nth 1 grammar)))
1668 "")))
1669 (force-mode-line-update)
1670 ;; run `proced-post-display-hook' only for a displayed buffer.
1671 (if (get-buffer-window) (run-hooks 'proced-post-display-hook))
1672 ;; done
1673 (or quiet (input-pending-p)
1674 (message (if revert "Updating process information...done."
1675 "Updating process display...done.")))))
1677 (defun proced-revert (&rest args)
1678 "Reevaluate the process listing based on the currently running processes.
1679 Preserves point and marks."
1680 (proced-update t))
1682 (defun proced-send-signal (&optional signal)
1683 "Send a SIGNAL to the marked processes.
1684 If no process is marked, operate on current process.
1685 SIGNAL may be a string (HUP, INT, TERM, etc.) or a number.
1686 If SIGNAL is nil display marked processes and query interactively for SIGNAL.
1687 After sending the signal, this command runs the normal hook
1688 `proced-after-send-signal-hook'."
1689 (interactive)
1690 (let ((regexp (proced-marker-regexp))
1691 process-alist)
1692 ;; collect marked processes
1693 (save-excursion
1694 (goto-char (point-min))
1695 (while (re-search-forward regexp nil t)
1696 (push (cons (proced-pid-at-point)
1697 ;; How much info should we collect here?
1698 (buffer-substring-no-properties
1699 (+ 2 (line-beginning-position))
1700 (line-end-position)))
1701 process-alist)))
1702 (setq process-alist
1703 (if process-alist
1704 (nreverse process-alist)
1705 ;; take current process
1706 (list (cons (proced-pid-at-point)
1707 (buffer-substring-no-properties
1708 (+ 2 (line-beginning-position))
1709 (line-end-position))))))
1710 (unless signal
1711 ;; Display marked processes (code taken from `dired-mark-pop-up').
1712 (let ((bufname " *Marked Processes*")
1713 (header-line (substring-no-properties proced-header-line)))
1714 (with-current-buffer (get-buffer-create bufname)
1715 (setq truncate-lines t
1716 proced-header-line header-line ; inherit header line
1717 header-line-format '(:eval (proced-header-line)))
1718 (add-hook 'post-command-hook 'force-mode-line-update nil t)
1719 (erase-buffer)
1720 (dolist (process process-alist)
1722 (save-window-excursion
1723 ;; Analogous to `dired-pop-to-buffer'
1724 ;; Don't split window horizontally. (Bug#1806)
1725 (let (split-width-threshold)
1726 (pop-to-buffer (current-buffer)))
1727 (fit-window-to-buffer (get-buffer-window) nil 1)
1728 (let* ((completion-ignore-case t)
1729 (pnum (if (= 1 (length process-alist))
1730 "1 process"
1731 (format "%d processes" (length process-alist))))
1732 ;; The following is an ugly hack. Is there a better way
1733 ;; to help people like me to remember the signals and
1734 ;; their meanings?
1735 (tmp (completing-read (concat "Send signal [" pnum
1736 "] (default TERM): ")
1737 proced-signal-list
1738 nil nil nil nil "TERM")))
1740 (match-string 1 tmp) tmp))))))
1741 ;; send signal
1742 (let ((count 0)
1743 failures)
1744 ;; Why not always use `signal-process'? See
1745 ;; http://lists.gnu.org/archive/html/emacs-devel/2008-03/msg02955.html
1746 (if (functionp proced-signal-function)
1747 ;; use built-in `signal-process'
1748 (let ((signal (if (stringp signal)
1750 (string-to-number signal)
1751 (make-symbol signal))
1752 signal))) ; number
1753 (dolist (process process-alist)
1754 (condition-case err
1755 (if (zerop (funcall
1756 proced-signal-function (car process) signal))
1757 (setq count (1+ count))
1759 (push (cdr process) failures))
1760 (error ; catch errors from failed signals
1763 (push (cdr process) failures)))))
1764 ;; use external system call
1765 (let ((signal (concat "-" (if (numberp signal)
1766 (number-to-string signal) signal))))
1767 (dolist (process process-alist)
1768 (with-temp-buffer
1769 (condition-case err
1770 (if (zerop (call-process
1771 proced-signal-function nil t nil
1772 signal (number-to-string (car process))))
1773 (setq count (1+ count))
1774 (proced-log (current-buffer))
1776 (push (cdr process) failures))
1777 (error ; catch errors from failed signals
1778 (proced-log (current-buffer))
1780 (push (cdr process) failures)))))))
1781 (if failures
1782 ;; Proced error message are not always very precise.
1783 ;; Can we issue a useful one-line summary in the
1784 ;; message area (using FAILURES) if only one signal failed?
1785 (proced-log-summary
1786 signal
1787 (format "%d of %d signal%s failed"
1788 (length failures) (length process-alist)
1789 (if (= 1 (length process-alist)) "" "s")))
1790 (proced-success-message "Sent signal to" count)))
1791 ;; final clean-up
1792 (run-hooks 'proced-after-send-signal-hook))))
1794 ;; similar to `dired-why'
1795 (defun proced-why ()
1796 "Pop up a buffer with error log output from Proced.
1797 A group of errors from a single command ends with a formfeed.
1799 (interactive)
1800 (if (get-buffer proced-log-buffer)
1801 (save-selected-window
1802 ;; move `proced-log-buffer' to the front of the buffer list
1803 (select-window (display-buffer (get-buffer proced-log-buffer)))
1804 (setq truncate-lines t)
1805 (set-buffer-modified-p nil)
1806 (setq buffer-read-only t)
1807 (goto-char (point-max))
1808 (forward-line -1)
1809 (backward-page 1)
1810 (recenter 0))))
1812 ;; similar to `dired-log'
1813 (defun proced-log (log &rest args)
1814 "Log a message or the contents of a buffer.
1815 If LOG is a string and there are more args, it is formatted with
1817 End each bunch of errors with (proced-log t signal):
1818 this inserts the current time, buffer and signal at the start of the page,
1820 (let ((obuf (current-buffer)))
1821 (with-current-buffer (get-buffer-create proced-log-buffer)
1822 (goto-char (point-max))
1823 (let (buffer-read-only)
1824 (cond ((stringp log)
1825 (insert (if args
1826 (apply 'format log args)
1827 log)))
1828 ((bufferp log)
1829 (insert-buffer-substring log))
1830 ((eq t log)
1831 (backward-page 1)
1832 (unless (bolp)
1834 (insert (current-time-string)
1837 (goto-char (point-max))
1840 ;; similar to `dired-log-summary'
1841 (defun proced-log-summary (signal string)
1842 "State a summary of SIGNAL's failures, in echo area and log buffer.
1843 STRING is an overall summary of the failures."
1844 (message "Signal %s: %s--type ? for details" signal string)
1845 ;; Log a summary describing a bunch of errors.
1847 (proced-log t signal))
1849 (defun proced-help ()
1850 "Provide help for the Proced user."
1851 (interactive)
1852 (proced-why)
1853 (if (eq last-command 'proced-help)
1854 (describe-mode)
1855 (message proced-help-string)))
1857 (defun proced-undo ()
1858 "Undo in a Proced buffer.
1859 This doesn't recover killed processes, it just undoes changes in the Proced
1860 buffer. You can use it to recover marks."
1861 (interactive)
1862 (let (buffer-read-only)
1863 (undo))
1864 (message "Change in Proced buffer undone.
1865 Killed processes cannot be recovered by Emacs."))
1867 (provide 'proced)
1869 ;; arch-tag: a6e312ad-9032-45aa-972d-31a8cfc545af
1870 ;;; proced.el ends here