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1 ;;; proced.el --- operate on system processes like dired
3 ;; Copyright (C) 2008-2013 Free Software Foundation, Inc.
5 ;; Author: Roland Winkler <winkler@gnu.org>
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", "sudo renice PID"
33 ;; `proced-send-signal' operates on multiple processes one by one.
34 ;; With "sudo" we want to execute one "kill" or "renice" command
35 ;; for all marked processes. Is there a `sudo-call-process'?
36 ;;
37 ;; Thoughts and Ideas
38 ;; - Currently, `process-attributes' returns the list of
39 ;; command-line arguments of a process as one concatenated string.
40 ;; This format is compatible with `shell-command'. Also, under
41 ;; MS-Windows, the command-line arguments are actually stored as a
42 ;; single string, so that it is impossible to reverse-engineer it back
43 ;; into separate arguments. Alternatively, `process-attributes'
44 ;; could (try to) return a list of strings that correspond to individual
45 ;; command-line arguments. Then one could feed such a list of
46 ;; command-line arguments into `call-process' or `start-process'.
47 ;; Are there real-world applications when such a feature would be useful?
48 ;; What about something like `proced-restart-pid'?
50 ;;; Code:
55 "Proced mode."
61 "Name of signal function.
62 It can be an elisp function (usually `signal-process') or a string specifying
69 "Name of renice command."
83 ;; POSIX 1003.1-2001
84 ;; Which systems do not support these signals so that we can
85 ;; exclude them from `proced-signal-list'?
89 "List of signals, used for minibuffer completion."
94 ;; For which attributes can we use a fixed width of the output field?
95 ;; A fixed width speeds up formatting, yet it can make
96 ;; `proced-grammar-alist' system-dependent.
97 ;; (If proced runs like top(1) we want it to be fast.)
98 ;;
99 ;; If it is impossible / unlikely that an attribute has the same value
100 ;; for two processes, then sorting can be based on one ordinary (fast)
101 ;; predicate like `<'. Otherwise, a list of proced predicates can be used
102 ;; to refine the sort.
103 ;;
104 ;; It would be neat if one could temporarily override the following
105 ;; predefined rules.
141 ;;
142 ;; attributes defined by proced (see `proced-process-attributes')
146 ;; process tree
148 "Alist of rules for handling Proced attributes.
150 Each element has the form
152 (KEY NAME FORMAT JUSTIFY PREDICATE REVERSE SORT-SCHEME REFINER).
154 Symbol KEY is the car of a process attribute.
156 String NAME appears in the header line.
158 FORMAT specifies the format for displaying the attribute values. It can
159 be a string passed to `format'. It can be a function called with one
160 argument, the value of the attribute. The value nil means take as is.
162 If JUSTIFY is an integer, its modulus gives the width of the attribute
163 values formatted with FORMAT. If JUSTIFY is positive, NAME appears
164 right-justified, otherwise it appears left-justified. If JUSTIFY is 'left
165 or 'right, the field width is calculated from all field values in the listing.
166 If JUSTIFY is 'left, the field values are formatted left-justified and
167 right-justified otherwise.
169 PREDICATE is the predicate for sorting and filtering the process listing
170 based on attribute KEY. PREDICATE takes two arguments P1 and P2,
171 the corresponding attribute values of two processes. PREDICATE should
172 return 'equal if P1 has same rank like P2. Any other non-nil value says
174 If PREDICATE is nil the attribute cannot be sorted.
176 PREDICATE defines an ascending sort order. REVERSE is non-nil if the sort
177 order is descending.
179 SORT-SCHEME is a list (KEY1 KEY2 ...) defining a hierarchy of rules
180 for sorting the process listing. KEY1, KEY2, ... are KEYs appearing as cars
181 of `proced-grammar-alist'. First the PREDICATE of KEY1 is evaluated.
182 If it yields non-equal, it defines the sort order for the corresponding
183 processes. If it evaluates to 'equal the PREDICATE of KEY2 is evaluated, etc.
185 REFINER can be a list of flags (LESS-B EQUAL-B LARGER-B) used by the command
186 `proced-refine' (see there) to refine the listing based on attribute KEY.
187 This command compares the value of attribute KEY of every process with
188 the value of attribute KEY of the process at the position of point
189 using PREDICATE.
190 If PREDICATE yields non-nil, the process is accepted if LESS-B is non-nil.
191 If PREDICATE yields 'equal, the process is accepted if EQUAL-B is non-nil.
192 If PREDICATE yields nil, the process is accepted if LARGER-B is non-nil.
194 REFINER can also be a list (FUNCTION HELP-ECHO).
195 FUNCTION is called with one argument, the PID of the process at the position
196 of point. The function must return a list of PIDs that is used for the refined
197 listing. HELP-ECHO is a string that is shown when mouse is over this field.
199 If REFINER is nil no refinement is done."
227 "List of functions defining custom attributes.
228 This variable extends the functionality of `proced-process-attributes'.
229 Each function is called with one argument, the list of attributes
230 of a system process. It returns a cons cell of the form (KEY . VALUE)
231 like `process-attributes'. This cons cell is appended to the list
232 returned by `proced-process-attributes'.
233 If the function returns nil, the value is ignored."
237 ;; Formatting and sorting rules are defined "per attribute". If formatting
238 ;; and / or sorting should use more than one attribute, it appears more
239 ;; transparent to define a new derived attribute, so that formatting and
240 ;; sorting can use them consistently. (Are there exceptions to this rule?
241 ;; Would it be advantageous to have yet more general methods available?)
242 ;; Sorting can also be based on attributes that are invisible in the listing.
250 state thcount vsize rss ttname tpgid minflt majflt cminflt cmajflt
252 "Alist of formats of listing.
253 The car of each element is a symbol, the name of the format.
254 The cdr is a list of attribute keys appearing in `proced-grammar-alist'.
255 An element of this list may also be a list of attribute keys that specifies
256 alternatives. If the first attribute is absent for a process, use the second
257 one, etc."
266 "Current format of Proced listing.
267 It can be the car of an element of `proced-format-alist'.
268 It can also be a list of keys appearing in `proced-grammar-alist'."
274 ;; FIXME: is there a better name for filter `user' that does not coincide
275 ;; with an attribute key?
284 "Alist of process filters.
285 The car of each element is a symbol, the name of the filter.
286 The cdr is a list of elementary filters that are applied to every process.
287 A process is displayed if it passes all elementary filters of a selected
288 filter.
290 An elementary filter can be one of the following:
291 \(KEY . REGEXP) If value of attribute KEY matches REGEXP,
292 accept this process.
293 \(KEY . FUN) Apply function FUN to attribute KEY. Accept this process,
294 if FUN returns non-nil.
295 \(function . FUN) For each process, apply function FUN to list of attributes
296 of each. Accept the process if FUN returns non-nil.
297 \(fun-all . FUN) Apply function FUN to entire process list.
298 FUN must return the filtered list."
309 "Current filter of proced listing.
310 It can be the car of an element of `proced-filter-alist'.
311 It can also be a list of elementary filters as in the cdrs of the elements
312 of `proced-filter-alist'."
323 "Current sort scheme for proced listing.
324 It must be the KEY of an element of `proced-grammar-alist'.
325 It can also be a list of KEYs as in the SORT-SCHEMEs of the elements
326 of `proced-grammar-alist'."
333 "Non-nil if proced listing is sorted in descending order."
339 "If non-nil, key of the attribute that defines the `goal-column'."
345 "Time interval in seconds for auto updating Proced buffers."
350 "Non-nil for auto update of a Proced buffer.
351 Can be changed interactively via `proced-toggle-auto-update'."
357 "Non-nil for display of Proced buffer as process tree."
363 "Normal hook run after displaying or updating a Proced buffer.
364 May be used to adapt the window size via `fit-window-to-buffer'."
370 "Normal hook run after sending a signal to processes by `proced-send-signal'.
371 May be used to revert the process listing."
376 ;; Internal variables
382 "Alist of processes displayed by Proced.
383 The car of each element is the PID, and the cdr is a list of
388 "Sort scheme for listing (internal format).
394 ;; Faces and font-lock code taken from dired,
395 ;; but face variables are deprecated for new code.
397 "Faces used by Proced."
403 "Face used for Proced marks."
408 "Face used for marked processes."
413 "Face used for header of attribute used for sorting."
417 "Regexp matching a marked line.
440 "(n)ext, (p)revious, (m)ark, (u)nmark, (k)ill, (q)uit (type ? for more help)"
444 "mouse-1, mouse-2: sort by attribute %s%s (%s)"
448 "mouse-2, RET: refine by attribute %s %s"
454 ;; Processes marked with `proced-marker-char'
455 ;; Should we make sure that only certain attributes are font-locked?
461 ;; moving
469 (define-key km [up] 'previous-line)
470 ;; marking
471 (define-key km "d" 'proced-mark) ; Dired compatibility ("delete")
472 (define-key km "m" 'proced-mark)
473 (put 'proced-mark :advertised-binding "m")
474 (define-key km "u" 'proced-unmark)
476 (define-key km "M" 'proced-mark-all)
477 (define-key km "U" 'proced-unmark-all)
478 (define-key km "t" 'proced-toggle-marks)
479 (define-key km "C" 'proced-mark-children)
480 (define-key km "P" 'proced-mark-parents)
481 ;; filtering
482 (define-key km "f" 'proced-filter-interactive)
483 (define-key km [mouse-2] 'proced-refine)
484 (define-key km "\C-m" 'proced-refine)
485 ;; sorting
486 (define-key km "sc" 'proced-sort-pcpu)
487 (define-key km "sm" 'proced-sort-pmem)
488 (define-key km "sp" 'proced-sort-pid)
489 (define-key km "ss" 'proced-sort-start)
490 (define-key km "sS" 'proced-sort-interactive)
491 (define-key km "st" 'proced-sort-time)
492 (define-key km "su" 'proced-sort-user)
493 ;; similar to `Buffer-menu-sort-by-column'
494 (define-key km [header-line mouse-1] 'proced-sort-header)
495 (define-key km [header-line mouse-2] 'proced-sort-header)
496 (define-key km "T" 'proced-toggle-tree)
497 ;; formatting
498 (define-key km "F" 'proced-format-interactive)
499 ;; operate
500 (define-key km "o" 'proced-omit-processes)
501 (define-key km "x" 'proced-send-signal) ; Dired compatibility
502 (define-key km "k" 'proced-send-signal) ; kill processes
503 (define-key km "r" 'proced-renice) ; renice processes
504 ;; misc
505 (define-key km "h" 'describe-mode)
506 (define-key km "?" 'proced-help)
507 (define-key km [remap undo] 'proced-undo)
508 (define-key km [remap advertised-undo] 'proced-undo)
509 ;; Additional keybindings are inherited from `special-mode-map'
510 km)
511 "Keymap for Proced commands.")
513 (easy-menu-define
514 proced-menu proced-mode-map "Proced Menu"
515 `("Proced"
516 ["Mark" proced-mark
517 :help "Mark Current Process"]
518 ["Unmark" proced-unmark
519 :help "Unmark Current Process"]
520 ["Mark All" proced-mark-all
521 :help "Mark All Processes"]
522 ["Unmark All" proced-unmark-all
523 :help "Unmark All Process"]
524 ["Toggle Marks" proced-toggle-marks
525 :help "Marked Processes Become Unmarked, and Vice Versa"]
526 ["Mark Children" proced-mark-children
527 :help "Mark Current Process and its Children"]
528 ["Mark Parents" proced-mark-parents
529 :help "Mark Current Process and its Parents"]
530 "--"
531 ("Filters"
532 :help "Select Filter for Process Listing"
533 ,@(mapcar (lambda (el)
534 (let ((filter (car el)))
535 `[,(symbol-name filter)
536 (proced-filter-interactive ',filter)
537 :style radio
538 :selected (eq proced-filter ',filter)]))
539 proced-filter-alist))
540 ("Sorting"
541 :help "Select Sort Scheme"
542 ["Sort..." proced-sort-interactive
543 :help "Sort Process List"]
544 "--"
545 ["Sort by %CPU" proced-sort-pcpu]
546 ["Sort by %MEM" proced-sort-pmem]
547 ["Sort by PID" proced-sort-pid]
548 ["Sort by START" proced-sort-start]
549 ["Sort by TIME" proced-sort-time]
550 ["Sort by USER" proced-sort-user])
551 ("Formats"
552 :help "Select Format for Process Listing"
553 ,@(mapcar (lambda (el)
554 (let ((format (car el)))
555 `[,(symbol-name format)
556 (proced-format-interactive ',format)
557 :style radio
558 :selected (eq proced-format ',format)]))
559 proced-format-alist))
560 ["Tree Display" proced-toggle-tree
561 :style toggle
562 :selected (eval proced-tree-flag)
563 :help "Display Proced Buffer as Process Tree"]
564 "--"
565 ["Omit Marked Processes" proced-omit-processes
566 :help "Omit Marked Processes in Process Listing."]
567 "--"
568 ["Revert" revert-buffer
569 :help "Revert Process Listing"]
570 ["Auto Update" proced-toggle-auto-update
571 :style toggle
572 :selected (eval proced-auto-update-flag)
573 :help "Auto Update of Proced Buffer"]
574 "--"
575 ["Send signal" proced-send-signal
576 :help "Send Signal to Marked Processes"]
577 ["Renice" proced-renice
578 :help "Renice Marked Processes"]))
580 ;; helper functions
581 (defun proced-marker-regexp ()
582 "Return regexp matching `proced-marker-char'."
583 ;; `proced-marker-char' must appear in column zero
584 (concat "^" (regexp-quote (char-to-string proced-marker-char))))
586 (defun proced-success-message (action count)
587 "Display success message for ACTION performed for COUNT processes."
588 (message "%s %s process%s" action count (if (= 1 count) "" "es")))
590 ;; Unlike dired, we do not define our own commands for vertical motion.
591 ;; If `goal-column' is set, `next-line' and `previous-line' are fancy
592 ;; commands to satisfy our modest needs. If `proced-goal-attribute'
593 ;; and/or `goal-column' are not set, `next-line' and `previous-line'
594 ;; are really what we need to preserve the column of point.
595 ;; We use `proced-move-to-goal-column' for "non-interactive" cases only
596 ;; to get a well-defined position of point.
598 (defun proced-move-to-goal-column ()
599 "Move to `goal-column' if non-nil. Return position of point."
600 (beginning-of-line)
601 (unless (eobp)
602 (if goal-column
603 (forward-char goal-column)
604 (forward-char 2)))
605 (point))
607 (defun proced-header-line ()
608 "Return header line for Proced buffer."
609 (list (propertize " " 'display '(space :align-to 0))
610 (if (<= (window-hscroll) (length proced-header-line))
611 (replace-regexp-in-string ;; preserve text properties
613 (substring proced-header-line (window-hscroll))))))
615 (defun proced-pid-at-point ()
616 "Return pid of system process at point.
617 Return nil if point is not on a process line."
618 (save-excursion
619 (beginning-of-line)
620 (if (looking-at "^. .")
621 (get-text-property (match-end 0) 'proced-pid))))
623 ;; proced mode
625 (define-derived-mode proced-mode special-mode "Proced"
626 "Mode for displaying system processes and sending signals to them.
631 The initial content of a listing is defined by the variable `proced-filter'
632 and the variable `proced-format'.
633 The variable `proced-filter' specifies which system processes are displayed.
634 The variable `proced-format' specifies which attributes are displayed for
636 to change the values of `proced-filter' and `proced-format'.
637 The current value of the variable `proced-filter' is indicated in the
638 mode line.
640 The sort order of Proced listings is defined by the variable `proced-sort'.
642 to change the sort scheme. The current sort scheme is indicated in the
646 displayed as process tree.
649 Refining an existing listing does not update the variable `proced-filter'.
651 The attribute-specific rules for formatting, filtering, sorting, and refining
652 are defined in `proced-grammar-alist'.
654 After displaying or updating a Proced buffer, Proced runs the normal hook
655 `proced-post-display-hook'.
658 (abbrev-mode 0)
659 (auto-fill-mode 0)
660 (setq buffer-read-only t
661 truncate-lines t
662 header-line-format '(:eval (proced-header-line)))
663 (add-hook 'post-command-hook 'force-mode-line-update nil t)
664 (set (make-local-variable 'revert-buffer-function) 'proced-revert)
665 (set (make-local-variable 'font-lock-defaults)
666 '(proced-font-lock-keywords t nil nil beginning-of-line))
667 (if (and (not proced-auto-update-timer) proced-auto-update-interval)
668 (setq proced-auto-update-timer
669 (run-at-time t proced-auto-update-interval
670 'proced-auto-update-timer))))
672 ;;;###autoload
673 (defun proced (&optional arg)
674 "Generate a listing of UNIX system processes.
676 If invoked with optional ARG, do not select the window displaying
677 the process information.
679 This function runs the normal hook `proced-post-display-hook'.
681 See `proced-mode' for a description of features available in
682 Proced buffers."
683 (interactive "P")
684 (unless proced-available
685 (error "Proced is not available on this system"))
686 (let ((buffer (get-buffer-create "*Proced*")) new)
687 (set-buffer buffer)
688 (setq new (zerop (buffer-size)))
689 (when new
690 (proced-mode)
691 ;; `proced-update' runs `proced-post-display-hook' only if the
692 ;; Proced buffer has been selected. Yet the following call of
693 ;; `proced-update' is for an empty Proced buffer that has not
694 ;; yet been selected. Therefore we need to call
695 ;; `proced-post-display-hook' below.
696 (proced-update t))
697 (if arg
698 (progn
699 (display-buffer buffer)
700 (with-current-buffer buffer
701 (proced-update t)))
702 (pop-to-buffer buffer)
703 (proced-update t)
704 (message
705 (substitute-command-keys
708 (defun proced-auto-update-timer ()
709 "Auto-update Proced buffers using `run-at-time'."
710 (dolist (buf (buffer-list))
711 (with-current-buffer buf
712 (if (and (eq major-mode 'proced-mode)
713 proced-auto-update-flag)
714 (proced-update t t)))))
716 (defun proced-toggle-auto-update (arg)
717 "Change whether this Proced buffer is updated automatically.
718 With prefix ARG, update this buffer automatically if ARG is positive,
719 otherwise do not update. Sets the variable `proced-auto-update-flag'.
720 The time interval for updates is specified via `proced-auto-update-interval'."
721 (interactive (list (or current-prefix-arg 'toggle)))
722 (setq proced-auto-update-flag
723 (cond ((eq arg 'toggle) (not proced-auto-update-flag))
724 (arg (> (prefix-numeric-value arg) 0))
725 (t (not proced-auto-update-flag))))
726 (message "Proced auto update %s"
727 (if proced-auto-update-flag "enabled" "disabled")))
729 ;;; Mark
731 (defun proced-mark (&optional count)
732 "Mark the current (or next COUNT) processes."
733 (interactive "p")
734 (proced-do-mark t count))
736 (defun proced-unmark (&optional count)
737 "Unmark the current (or next COUNT) processes."
738 (interactive "p")
739 (proced-do-mark nil count))
741 (defun proced-unmark-backward (&optional count)
742 "Unmark the previous (or COUNT previous) processes."
743 ;; Analogous to `dired-unmark-backward',
744 ;; but `ibuffer-unmark-backward' behaves different.
745 (interactive "p")
746 (proced-do-mark nil (- (or count 1))))
748 (defun proced-do-mark (mark &optional count)
749 "Mark the current (or next COUNT) processes using MARK."
750 (or count (setq count 1))
751 (let ((backward (< count 0))
752 buffer-read-only)
753 (setq count (1+ (if (<= 0 count) count
754 (min (1- (line-number-at-pos)) (abs count)))))
755 (beginning-of-line)
756 (while (not (or (zerop (setq count (1- count))) (eobp)))
757 (proced-insert-mark mark backward))
758 (proced-move-to-goal-column)))
760 (defun proced-toggle-marks ()
761 "Toggle marks: marked processes become unmarked, and vice versa."
762 (interactive)
763 (let ((mark-re (proced-marker-regexp))
764 buffer-read-only)
765 (save-excursion
766 (goto-char (point-min))
767 (while (not (eobp))
768 (cond ((looking-at mark-re)
769 (proced-insert-mark nil))
770 ((looking-at " ")
771 (proced-insert-mark t))
772 (t
773 (forward-line 1)))))))
775 (defun proced-insert-mark (mark &optional backward)
776 "If MARK is non-nil, insert `proced-marker-char'.
777 If BACKWARD is non-nil, move one line backwards before inserting the mark.
778 Otherwise move one line forward after inserting the mark."
779 (if backward (forward-line -1))
780 (insert (if mark proced-marker-char ?\s))
781 (delete-char 1)
782 (unless backward (forward-line)))
784 (defun proced-mark-all ()
785 "Mark all processes.
786 If `transient-mark-mode' is turned on and the region is active,
787 mark the region."
788 (interactive)
789 (proced-do-mark-all t))
791 (defun proced-unmark-all ()
792 "Unmark all processes.
793 If `transient-mark-mode' is turned on and the region is active,
794 unmark the region."
795 (interactive)
796 (proced-do-mark-all nil))
798 (defun proced-do-mark-all (mark)
799 "Mark all processes using MARK.
800 If `transient-mark-mode' is turned on and the region is active,
801 mark the region."
802 (let* ((count 0)
803 (proced-marker-char (if mark proced-marker-char ?\s))
804 (marker-re (proced-marker-regexp))
805 end buffer-read-only)
806 (save-excursion
807 (if (use-region-p)
808 ;; Operate even on those lines that are only partially a part
809 ;; of region. This appears most consistent with
810 ;; `proced-move-to-goal-column'.
811 (progn (setq end (save-excursion
812 (goto-char (region-end))
813 (unless (looking-at "^") (forward-line))
814 (point)))
815 (goto-char (region-beginning))
816 (unless (looking-at "^") (beginning-of-line)))
817 (goto-char (point-min))
818 (setq end (point-max)))
819 (while (< (point) end)
820 (unless (looking-at marker-re)
821 (setq count (1+ count))
822 (insert proced-marker-char)
823 (delete-char 1))
824 (forward-line))
825 (proced-success-message (if mark "Marked" "Unmarked") count))))
827 (defun proced-mark-children (ppid &optional omit-ppid)
828 "Mark child processes of process PPID.
829 Also mark process PPID unless prefix OMIT-PPID is non-nil."
830 (interactive (list (proced-pid-at-point) current-prefix-arg))
831 (proced-mark-process-alist
832 (proced-filter-children proced-process-alist ppid omit-ppid)))
834 (defun proced-mark-parents (cpid &optional omit-cpid)
835 "Mark parent processes of process CPID.
836 Also mark CPID unless prefix OMIT-CPID is non-nil."
837 (interactive (list (proced-pid-at-point) current-prefix-arg))
838 (proced-mark-process-alist
839 (proced-filter-parents proced-process-alist cpid omit-cpid)))
841 (defun proced-mark-process-alist (process-alist &optional quiet)
842 "Mark processes in PROCESS-ALIST.
843 If QUIET is non-nil suppress status message."
844 (let ((count 0))
845 (if process-alist
846 (let (buffer-read-only)
847 (save-excursion
848 (goto-char (point-min))
849 (while (not (eobp))
850 (when (assq (proced-pid-at-point) process-alist)
851 (insert proced-marker-char)
852 (delete-char 1)
853 (setq count (1+ count)))
854 (forward-line)))))
855 (unless quiet
856 (proced-success-message "Marked" count))))
858 ;; Mostly analog of `dired-do-kill-lines'.
859 ;; However, for negative args the target lines of `dired-do-kill-lines'
860 ;; include the current line, whereas `dired-mark' for negative args operates
861 ;; on the preceding lines. Here we are consistent with `dired-mark'.
862 (defun proced-omit-processes (&optional arg quiet)
863 "Omit marked processes.
864 With prefix ARG, omit that many lines starting with the current line.
865 \(A negative argument omits backward.)
866 If `transient-mark-mode' is turned on and the region is active,
867 omit the processes in region.
868 If QUIET is non-nil suppress status message.
869 Returns count of omitted lines."
870 (interactive "P")
871 (let ((mark-re (proced-marker-regexp))
872 (count 0)
873 buffer-read-only)
874 (cond ((use-region-p) ;; Omit active region
875 (let ((lines (count-lines (region-beginning) (region-end))))
876 (save-excursion
877 (goto-char (region-beginning))
878 (while (< count lines)
879 (proced-omit-process)
880 (setq count (1+ count))))))
881 ((not arg) ;; Omit marked lines
882 (save-excursion
883 (goto-char (point-min))
884 (while (and (not (eobp))
885 (re-search-forward mark-re nil t))
886 (proced-omit-process)
887 (setq count (1+ count)))))
888 ((< 0 arg) ;; Omit forward
889 (while (and (not (eobp)) (< count arg))
890 (proced-omit-process)
891 (setq count (1+ count))))
892 ((< arg 0) ;; Omit backward
893 (while (and (not (bobp)) (< count (- arg)))
894 (forward-line -1)
895 (proced-omit-process)
896 (setq count (1+ count)))))
897 (unless (zerop count) (proced-move-to-goal-column))
898 (unless quiet (proced-success-message "Omitted" count))
899 count))
901 (defun proced-omit-process ()
902 "Omit process from listing point is on.
903 Update `proced-process-alist' accordingly."
904 (setq proced-process-alist
905 (assq-delete-all (proced-pid-at-point) proced-process-alist))
906 (delete-region (line-beginning-position)
907 (save-excursion (forward-line) (point))))
909 ;;; Filtering
911 (defun proced-filter (process-alist filter-list)
912 "Apply FILTER-LIST to PROCESS-ALIST.
913 Return the filtered process list."
914 (if (symbolp filter-list)
915 (setq filter-list (cdr (assq filter-list proced-filter-alist))))
916 (dolist (filter filter-list)
917 (let (new-alist)
918 (cond ( ;; apply function to entire process list
919 (eq (car filter) 'fun-all)
920 (setq new-alist (funcall (cdr filter) process-alist)))
921 ( ;; apply predicate to each list of attributes
922 (eq (car filter) 'function)
923 (dolist (process process-alist)
924 (if (funcall (car filter) (cdr process))
925 (push process new-alist))))
926 (t ;; apply predicate to specified attribute
927 (let ((fun (if (stringp (cdr filter))
928 `(lambda (val)
929 (string-match ,(cdr filter) val))
930 (cdr filter)))
931 value)
932 (dolist (process process-alist)
933 (setq value (cdr (assq (car filter) (cdr process))))
934 (if (and value (funcall fun value))
935 (push process new-alist))))))
936 (setq process-alist new-alist)))
937 process-alist)
939 (defun proced-filter-interactive (scheme)
940 "Filter Proced buffer using SCHEME.
941 When called interactively, an empty string means nil, i.e., no filtering.
942 Set variable `proced-filter' to SCHEME. Revert listing."
943 (interactive
944 (let ((scheme (completing-read "Filter: "
945 proced-filter-alist nil t)))
946 (list (if (string= "" scheme) nil (intern scheme)))))
947 ;; only update if necessary
948 (unless (eq proced-filter scheme)
949 (setq proced-filter scheme)
950 (proced-update t)))
952 (defun proced-filter-parents (process-alist pid &optional omit-pid)
953 "For PROCESS-ALIST return list of parent processes of PID.
954 This list includes PID unless OMIT-PID is non-nil."
955 (let ((parent-list (unless omit-pid (list (assq pid process-alist))))
956 (process (assq pid process-alist))
957 ppid)
958 (while (and (setq ppid (cdr (assq 'ppid (cdr process))))
959 ;; Ignore a PPID that equals PID.
960 (/= ppid pid)
961 ;; Accept only PPIDs that correspond to members in PROCESS-ALIST.
962 (setq process (assq ppid process-alist)))
963 (setq pid ppid)
964 (push process parent-list))
965 parent-list))
967 (defun proced-filter-children (process-alist ppid &optional omit-ppid)
968 "For PROCESS-ALIST return list of child processes of PPID.
969 This list includes PPID unless OMIT-PPID is non-nil."
970 (let ((proced-temp-alist (proced-children-alist process-alist))
971 new-alist)
972 (dolist (pid (proced-children-pids ppid))
973 (push (assq pid process-alist) new-alist))
974 (if omit-ppid
975 (assq-delete-all ppid new-alist)
976 new-alist)))
978 ;;; Process tree
980 (defun proced-children-alist (process-alist)
981 "Return children alist for PROCESS-ALIST.
982 The children alist has elements (PPID PID1 PID2 ...).
983 PPID is a parent PID. PID1, PID2, ... are the child processes of PPID.
984 The children alist inherits the sorting order of PROCESS-ALIST.
985 The list of children does not include grandchildren."
986 ;; The PPIDs inherit the sorting order of PROCESS-ALIST.
987 (let ((process-tree (mapcar (lambda (a) (list (car a))) process-alist))
988 ppid)
989 (dolist (process process-alist)
990 (setq ppid (cdr (assq 'ppid (cdr process))))
991 (if (and ppid
992 ;; Ignore a PPID that equals PID.
993 (/= ppid (car process))
994 ;; Accept only PPIDs that correspond to members in PROCESS-ALIST.
995 (assq ppid process-alist))
996 (let ((temp-alist process-tree) elt)
997 (while (setq elt (pop temp-alist))
998 (when (eq ppid (car elt))
999 (setq temp-alist nil)
1000 (setcdr elt (cons (car process) (cdr elt))))))))
1001 ;; The child processes inherit the sorting order of PROCESS-ALIST.
1002 (setq process-tree
1003 (mapcar (lambda (a) (cons (car a) (nreverse (cdr a))))
1004 process-tree))))
1006 (defun proced-children-pids (ppid)
1007 "Return list of children PIDs of PPID (including PPID)."
1008 (let ((cpids (cdr (assq ppid proced-temp-alist))))
1009 (if cpids
1010 (cons ppid (apply 'append (mapcar 'proced-children-pids cpids)))
1011 (list ppid))))
1013 (defun proced-process-tree (process-alist)
1014 "Return process tree for PROCESS-ALIST.
1015 It is an alist of alists where the car of each alist is a parent process
1016 and the cdr is a list of child processes according to the ppid attribute
1017 of these processes.
1018 The process tree inherits the sorting order of PROCESS-ALIST."
1019 (let ((proced-temp-alist (proced-children-alist process-alist))
1020 pid-alist proced-process-tree)
1021 (while (setq pid-alist (pop proced-temp-alist))
1022 (push (proced-process-tree-internal pid-alist) proced-process-tree))
1023 (nreverse proced-process-tree)))
1025 (defun proced-process-tree-internal (pid-alist)
1026 "Helper function for `proced-process-tree'."
1027 (let ((cpid-list (cdr pid-alist)) cpid-alist cpid)
1028 (while (setq cpid (car cpid-list))
1029 (if (setq cpid-alist (assq cpid proced-temp-alist))
1030 ;; Unprocessed part of process tree that needs to be
1031 ;; analyzed recursively.
1032 (progn
1033 (setq proced-temp-alist
1034 (assq-delete-all cpid proced-temp-alist))
1035 (setcar cpid-list (proced-process-tree-internal cpid-alist)))
1036 ;; We already processed this subtree and take it "as is".
1037 (setcar cpid-list (assq cpid proced-process-tree))
1038 (setq proced-process-tree
1039 (assq-delete-all cpid proced-process-tree)))
1040 (pop cpid-list)))
1041 pid-alist)
1043 (defun proced-toggle-tree (arg)
1044 "Toggle the display of the process listing as process tree.
1045 With prefix ARG, display as process tree if ARG is positive, otherwise
1046 do not display as process tree. Sets the variable `proced-tree-flag'.
1048 The process tree is generated from the selected processes in the
1049 Proced buffer (that is, the processes in `proced-process-alist').
1050 All processes that do not have a parent process in this list
1051 according to their ppid attribute become the root of a process tree.
1052 Each parent process is followed by its child processes.
1053 The process tree inherits the chosen sorting order of the process listing,
1054 that is, child processes of the same parent process are sorted using
1055 the selected sorting order."
1056 (interactive (list (or current-prefix-arg 'toggle)))
1057 (setq proced-tree-flag
1058 (cond ((eq arg 'toggle) (not proced-tree-flag))
1059 (arg (> (prefix-numeric-value arg) 0))
1060 (t (not proced-tree-flag))))
1061 (proced-update)
1062 (message "Proced process tree display %s"
1063 (if proced-tree-flag "enabled" "disabled")))
1065 (defun proced-tree (process-alist)
1066 "Rearrange PROCESS-ALIST as process tree.
1067 If `proced-tree-flag' is non-nil, rearrange PROCESS-ALIST such that
1068 every processes is followed by its child processes. Each process
1069 gets a tree attribute that specifies the depth of the process in the tree.
1070 A root process is a process with no parent within PROCESS-ALIST according
1071 to its value of the ppid attribute. It has depth 0.
1073 If `proced-tree-flag' is nil, remove the tree attribute.
1074 Return the rearranged process list."
1075 (if proced-tree-flag
1076 ;; add tree attribute
1077 (let ((process-tree (proced-process-tree process-alist))
1078 (proced-tree-depth 0)
1079 (proced-temp-alist process-alist)
1080 proced-process-tree pt)
1081 (while (setq pt (pop process-tree))
1082 (proced-tree-insert pt))
1083 (nreverse proced-process-tree))
1084 ;; remove tree attribute
1085 (let ((process-alist process-alist))
1086 (while process-alist
1087 (setcar process-alist
1088 (assq-delete-all 'tree (car process-alist)))
1089 (pop process-alist)))
1090 process-alist))
1092 (defun proced-tree-insert (process-tree)
1093 "Helper function for `proced-tree'."
1094 (let ((pprocess (assq (car process-tree) proced-temp-alist)))
1095 (push (append (list (car pprocess))
1096 (list (cons 'tree proced-tree-depth))
1097 (cdr pprocess))
1098 proced-process-tree)
1099 (if (cdr process-tree)
1100 (let ((proced-tree-depth (1+ proced-tree-depth)))
1101 (mapc 'proced-tree-insert (cdr process-tree))))))
1103 ;; Refining
1105 ;; Filters are used to select the processes in a new listing.
1106 ;; Refiners are used to narrow down further (interactively) the processes
1107 ;; in an existing listing.
1109 (defun proced-refine (&optional event)
1110 "Refine Proced listing by comparing with the attribute value at point.
1111 Optional EVENT is the location of the Proced field.
1113 Refinement is controlled by the REFINER defined for each attribute ATTR
1114 in `proced-grammar-alist'.
1116 If REFINER is a list of flags and point is on a process's value of ATTR,
1117 this command compares the value of ATTR of every process with the value
1118 of ATTR of the process at the position of point.
1120 The predicate for the comparison of two ATTR values is defined
1121 in `proced-grammar-alist'. For each return value of the predicate
1122 a refine flag is defined in `proced-grammar-alist'. One can select
1125 is included in the new listing if the refine flag for the corresponding
1126 return value of the predicate is non-nil.
1128 the current values of these refine flags.
1130 If REFINER is a cons pair (FUNCTION . HELP-ECHO), FUNCTION is called
1131 with one argument, the PID of the process at the position of point.
1132 The function must return a list of PIDs that is used for the refined
1133 listing. HELP-ECHO is a string that is shown when mouse is over this field.
1135 This command refines an already existing process listing generated initially
1136 based on the value of the variable `proced-filter'. It does not change
1137 this variable. It does not revert the listing. If you frequently need
1138 a certain refinement, consider defining a new filter in `proced-filter-alist'."
1139 (interactive (list last-input-event))
1140 (if event (posn-set-point (event-end event)))
1141 (let ((key (get-text-property (point) 'proced-key))
1142 (pid (get-text-property (point) 'proced-pid)))
1143 (if (and key pid)
1144 (let* ((grammar (assq key proced-grammar-alist))
1145 (refiner (nth 7 grammar)))
1146 (when refiner
1147 (cond ((functionp (car refiner))
1148 (setq proced-process-alist (funcall (car refiner) pid)))
1149 ((consp refiner)
1150 (let ((predicate (nth 4 grammar))
1151 (ref (cdr (assq key (cdr (assq pid proced-process-alist)))))
1152 val new-alist)
1153 (dolist (process proced-process-alist)
1154 (setq val (funcall predicate (cdr (assq key (cdr process))) ref))
1155 (if (cond ((not val) (nth 2 refiner))
1156 ((eq val 'equal) (nth 1 refiner))
1157 (val (car refiner)))
1158 (push process new-alist)))
1159 (setq proced-process-alist new-alist))))
1160 ;; Do not revert listing.
1161 (proced-update)))
1162 (message "No refiner defined here."))))
1164 ;; Proced predicates for sorting and filtering are based on a three-valued
1165 ;; logic:
1166 ;; Predicates take two arguments P1 and P2, the corresponding attribute
1167 ;; values of two processes. Predicates should return 'equal if P1 has
1168 ;; same rank like P2. Any other non-nil value says that P1 is "less than" P2,
1169 ;; or nil if not.
1171 (defun proced-< (num1 num2)
1172 "Return t if NUM1 less than NUM2.
1173 Return `equal' if NUM1 equals NUM2. Return nil if NUM1 greater than NUM2."
1174 (if (= num1 num2)
1175 'equal
1176 (< num1 num2)))
1178 (defun proced-string-lessp (s1 s2)
1179 "Return t if string S1 is less than S2 in lexicographic order.
1180 Return `equal' if S1 and S2 have identical contents.
1181 Return nil otherwise."
1182 (if (string= s1 s2)
1183 'equal
1184 (string-lessp s1 s2)))
1186 (defun proced-time-lessp (t1 t2)
1187 "Return t if time value T1 is less than time value T2.
1188 Return `equal' if T1 equals T2. Return nil otherwise."
1189 (with-decoded-time-value ((high1 low1 micro1 pico1 type1 t1)
1190 (high2 low2 micro2 pico2 type2 t2))
1191 (cond ((< high1 high2))
1192 ((< high2 high1) nil)
1193 ((< low1 low2))
1194 ((< low2 low1) nil)
1195 ((< micro1 micro2))
1196 ((< micro2 micro1) nil)
1197 ((< pico1 pico2))
1198 ((< pico2 pico1) nil)
1199 (t 'equal))))
1201 ;;; Sorting
1203 (defsubst proced-xor (b1 b2)
1204 "Return the logical exclusive or of args B1 and B2."
1205 (and (or b1 b2)
1206 (not (and b1 b2))))
1208 (defun proced-sort-p (p1 p2)
1209 "Predicate for sorting processes P1 and P2."
1210 (if (not (cdr proced-sort-internal))
1211 ;; only one predicate: fast scheme
1212 (let* ((sorter (car proced-sort-internal))
1213 (k1 (cdr (assq (car sorter) (cdr p1))))
1214 (k2 (cdr (assq (car sorter) (cdr p2)))))
1215 ;; if the attributes are undefined, we should really abort sorting
1216 (if (and k1 k2)
1217 (proced-xor (funcall (nth 1 sorter) k1 k2)
1218 (nth 2 sorter))))
1219 (let ((sort-list proced-sort-internal) sorter predicate k1 k2)
1220 (catch 'done
1221 (while (setq sorter (pop sort-list))
1222 (setq k1 (cdr (assq (car sorter) (cdr p1)))
1223 k2 (cdr (assq (car sorter) (cdr p2)))
1224 predicate
1225 (if (and k1 k2)
1226 (funcall (nth 1 sorter) k1 k2)))
1227 (if (not (eq predicate 'equal))
1228 (throw 'done (proced-xor predicate (nth 2 sorter)))))
1229 (eq t predicate)))))
1231 (defun proced-sort (process-alist sorter descend)
1232 "Sort PROCESS-ALIST using scheme SORTER.
1233 SORTER is a scheme like `proced-sort'.
1234 DESCEND is non-nil if the first element of SORTER is sorted
1235 in descending order.
1236 Return the sorted process list."
1237 ;; translate SORTER into a list of lists (KEY PREDICATE REVERSE)
1238 (setq proced-sort-internal
1239 (mapcar (lambda (arg)
1240 (let ((grammar (assq arg proced-grammar-alist)))
1241 (unless (nth 4 grammar)
1242 (error "Attribute %s not sortable" (car grammar)))
1243 (list arg (nth 4 grammar) (nth 5 grammar))))
1244 (cond ((listp sorter) sorter)
1245 ((and (symbolp sorter)
1246 (nth 6 (assq sorter proced-grammar-alist))))
1247 ((symbolp sorter) (list sorter))
1248 (t (error "Sorter undefined %s" sorter)))))
1249 (if proced-sort-internal
1250 (progn
1251 ;; splice DESCEND into the list
1252 (setcar proced-sort-internal
1253 (list (caar proced-sort-internal)
1254 (nth 1 (car proced-sort-internal)) descend))
1255 (sort process-alist 'proced-sort-p))
1256 process-alist))
1258 (defun proced-sort-interactive (scheme &optional arg)
1259 "Sort Proced buffer using SCHEME.
1260 When called interactively, an empty string means nil, i.e., no sorting.
1262 Prefix ARG controls sort order:
1263 - If prefix ARG is positive (negative), sort in ascending (descending) order.
1264 - If ARG is nil or 'no-arg and SCHEME is equal to the previous sorting scheme,
1265 reverse the sorting order.
1266 - If ARG is nil or 'no-arg and SCHEME differs from the previous sorting scheme,
1267 adopt the sorting order defined for SCHEME in `proced-grammar-alist'.
1269 Set variable `proced-sort' to SCHEME. The current sort scheme is displayed
1271 (interactive
1272 (let* (choices
1273 (scheme (completing-read "Sort attribute: "
1274 (dolist (grammar proced-grammar-alist choices)
1275 (if (nth 4 grammar)
1276 (push (list (car grammar)) choices)))
1277 nil t)))
1278 (list (if (string= "" scheme) nil (intern scheme))
1279 ;; like 'toggle in `define-derived-mode'
1280 (or current-prefix-arg 'no-arg))))
1282 (setq proced-descend
1283 ;; If `proced-sort-interactive' is called repeatedly for the same
1284 ;; sort key, the sort order is reversed.
1285 (cond ((and (eq arg 'no-arg) (equal proced-sort scheme))
1286 (not proced-descend))
1287 ((eq arg 'no-arg)
1288 (nth 5 (assq (if (consp scheme) (car scheme) scheme)
1289 proced-grammar-alist)))
1290 (arg (< (prefix-numeric-value arg) 0))
1291 ((equal proced-sort scheme)
1292 (not proced-descend))
1293 (t (nth 5 (assq (if (consp scheme) (car scheme) scheme)
1294 proced-grammar-alist))))
1295 proced-sort scheme)
1296 (proced-update))
1298 (defun proced-sort-pcpu (&optional arg)
1299 "Sort Proced buffer by percentage CPU time (%CPU).
1300 Prefix ARG controls sort order, see `proced-sort-interactive'."
1301 (interactive (list (or current-prefix-arg 'no-arg)))
1302 (proced-sort-interactive 'pcpu arg))
1304 (defun proced-sort-pmem (&optional arg)
1305 "Sort Proced buffer by percentage memory usage (%MEM).
1306 Prefix ARG controls sort order, see `proced-sort-interactive'."
1307 (interactive (list (or current-prefix-arg 'no-arg)))
1308 (proced-sort-interactive 'pmem arg))
1310 (defun proced-sort-pid (&optional arg)
1311 "Sort Proced buffer by PID.
1312 Prefix ARG controls sort order, see `proced-sort-interactive'."
1313 (interactive (list (or current-prefix-arg 'no-arg)))
1314 (proced-sort-interactive 'pid arg))
1316 (defun proced-sort-start (&optional arg)
1317 "Sort Proced buffer by time the command started (START).
1318 Prefix ARG controls sort order, see `proced-sort-interactive'."
1319 (interactive (list (or current-prefix-arg 'no-arg)))
1320 (proced-sort-interactive 'start arg))
1322 (defun proced-sort-time (&optional arg)
1323 "Sort Proced buffer by CPU time (TIME).
1324 Prefix ARG controls sort order, see `proced-sort-interactive'."
1325 (interactive (list (or current-prefix-arg 'no-arg)))
1326 (proced-sort-interactive 'time arg))
1328 (defun proced-sort-user (&optional arg)
1329 "Sort Proced buffer by USER.
1330 Prefix ARG controls sort order, see `proced-sort-interactive'."
1331 (interactive (list (or current-prefix-arg 'no-arg)))
1332 (proced-sort-interactive 'user arg))
1334 (defun proced-sort-header (event &optional arg)
1335 "Sort Proced listing based on an attribute.
1336 EVENT is a mouse event with starting position in the header line.
1337 It is converted to the corresponding attribute key.
1338 This command updates the variable `proced-sort'.
1339 Prefix ARG controls sort order, see `proced-sort-interactive'."
1340 (interactive (list last-input-event (or last-prefix-arg 'no-arg)))
1341 (let ((start (event-start event))
1342 col key)
1343 (save-selected-window
1344 (select-window (posn-window start))
1345 (setq col (+ (1- (car (posn-actual-col-row start)))
1346 (window-hscroll)))
1347 (when (and (<= 0 col) (< col (length proced-header-line)))
1348 (setq key (get-text-property col 'proced-key proced-header-line))
1349 (if key
1350 (proced-sort-interactive key arg)
1351 (message "No sorter defined here."))))))
1353 ;;; Formatting
1355 (defun proced-format-time (time)
1356 "Format time interval TIME."
1357 (let* ((ftime (float-time time))
1358 (days (truncate ftime 86400))
1359 (ftime (mod ftime 86400))
1360 (hours (truncate ftime 3600))
1361 (ftime (mod ftime 3600))
1362 (minutes (truncate ftime 60))
1363 (seconds (mod ftime 60)))
1364 (cond ((< 0 days)
1365 (format "%d-%02d:%02d:%02d" days hours minutes seconds))
1366 ((< 0 hours)
1367 (format "%02d:%02d:%02d" hours minutes seconds))
1368 (t
1369 (format "%02d:%02d" minutes seconds)))))
1371 (defun proced-format-start (start)
1372 "Format time START.
1373 The return string is always 6 characters wide."
1374 (let ((d-start (decode-time start))
1375 (d-current (decode-time)))
1376 (cond ( ;; process started in previous years
1377 (< (nth 5 d-start) (nth 5 d-current))
1378 (format-time-string " %Y" start))
1379 ;; process started today
1380 ((and (= (nth 3 d-start) (nth 3 d-current))
1381 (= (nth 4 d-start) (nth 4 d-current)))
1382 (format-time-string " %H:%M" start))
1383 (t ;; process started this year
1384 (format-time-string "%b %e" start)))))
1386 (defun proced-format-ttname (ttname)
1388 ;; Does this work for all systems?
1390 (match-end 0) 0)))
1392 (defun proced-format-tree (tree)
1393 "Format attribute TREE."
1394 (concat (make-string tree ?\s) (number-to-string tree)))
1396 ;; Proced assumes that every process occupies only one line in the listing.
1397 (defun proced-format-args (args)
1398 "Format attribute ARGS.
1402 (defun proced-format (process-alist format)
1403 "Display PROCESS-ALIST using FORMAT."
1404 (if (symbolp format)
1405 (setq format (cdr (assq format proced-format-alist))))
1407 ;; Not all systems give us all attributes. We take `emacs-pid' as a
1408 ;; representative process PID. If FORMAT contains a list of alternative
1409 ;; attributes, we take the first attribute that is non-nil for `emacs-pid'.
1410 ;; If none of the alternatives is non-nil, the attribute is ignored
1411 ;; in the listing.
1412 (let ((standard-attributes
1413 (car (proced-process-attributes (list (emacs-pid)))))
1414 new-format fmi)
1415 (if (and proced-tree-flag
1416 (assq 'ppid standard-attributes))
1417 (push (cons 'tree 0) standard-attributes))
1418 (dolist (fmt format)
1419 (if (symbolp fmt)
1420 (if (assq fmt standard-attributes)
1421 (push fmt new-format))
1422 (while (setq fmi (pop fmt))
1423 (when (assq fmi standard-attributes)
1424 (push fmi new-format)
1425 (setq fmt nil)))))
1426 (setq format (nreverse new-format)))
1429 (let ((whitespace " ") (unknown "?")
1430 (sort-key (if (consp proced-sort) (car proced-sort) proced-sort))
1431 header-list grammar)
1432 ;; Loop over all attributes
1433 (while (setq grammar (assq (pop format) proced-grammar-alist))
1434 (let* ((key (car grammar))
1435 (fun (cond ((stringp (nth 2 grammar))
1436 `(lambda (arg) (format ,(nth 2 grammar) arg)))
1437 ((not (nth 2 grammar)) 'identity)
1438 ( t (nth 2 grammar))))
1439 (whitespace (if format whitespace ""))
1440 ;; Text properties:
1441 ;; We use the text property `proced-key' to store in each
1442 ;; field the corresponding key.
1443 ;; Of course, the sort predicate appearing in help-echo
1444 ;; is only part of the story. But it gives the main idea.
1445 (hprops
1446 (if (nth 4 grammar)
1447 (let ((descend (if (eq key sort-key) proced-descend (nth 5 grammar))))
1448 `(proced-key ,key mouse-face highlight
1449 help-echo ,(format proced-header-help-echo
1450 (if descend "-" "+")
1451 (nth 1 grammar)
1452 (if descend "descending" "ascending"))))))
1453 (refiner (nth 7 grammar))
1454 (fprops
1455 (cond ((functionp (car refiner))
1456 `(proced-key ,key mouse-face highlight
1457 help-echo ,(format "mouse-2, RET: %s"
1458 (nth 1 refiner))))
1459 ((consp refiner)
1460 `(proced-key ,key mouse-face highlight
1461 help-echo ,(format "mouse-2, RET: refine by attribute %s %s"
1462 (nth 1 grammar)
1463 (mapconcat (lambda (s)
1464 (if s "+" "-"))
1465 refiner ""))))))
1466 value)
1468 ;; highlight the header of the sort column
1469 (if (eq key sort-key)
1470 (setq hprops (append '(face proced-sort-header) hprops)))
1471 (goto-char (point-min))
1472 (cond ( ;; fixed width of output field
1473 (numberp (nth 3 grammar))
1474 (dolist (process process-alist)
1475 (end-of-line)
1476 (setq value (cdr (assq key (cdr process))))
1477 (insert (if value
1478 (apply 'propertize (funcall fun value) fprops)
1479 (format (concat "%" (number-to-string (nth 3 grammar)) "s")
1480 unknown))
1481 whitespace)
1482 (forward-line))
1483 (push (format (concat "%" (number-to-string (nth 3 grammar)) "s")
1484 (apply 'propertize (nth 1 grammar) hprops))
1485 header-list))
1487 ( ;; last field left-justified
1488 (and (not format) (eq 'left (nth 3 grammar)))
1489 (dolist (process process-alist)
1490 (end-of-line)
1491 (setq value (cdr (assq key (cdr process))))
1492 (insert (if value (apply 'propertize (funcall fun value) fprops)
1493 unknown))
1494 (forward-line))
1495 (push (apply 'propertize (nth 1 grammar) hprops) header-list))
1497 (t ;; calculated field width
1498 (let ((width (length (nth 1 grammar)))
1499 field-list value)
1500 (dolist (process process-alist)
1501 (setq value (cdr (assq key (cdr process))))
1502 (if value
1503 (setq value (apply 'propertize (funcall fun value) fprops)
1504 width (max width (length value))
1505 field-list (cons value field-list))
1506 (push unknown field-list)
1507 (setq width (max width (length unknown)))))
1508 (let ((afmt (concat "%" (if (eq 'left (nth 3 grammar)) "-" "")
1509 (number-to-string width) "s")))
1510 (push (format afmt (apply 'propertize (nth 1 grammar) hprops))
1511 header-list)
1512 (dolist (value (nreverse field-list))
1513 (end-of-line)
1514 (insert (format afmt value) whitespace)
1515 (forward-line))))))))
1517 ;; final cleanup
1518 (goto-char (point-min))
1519 (dolist (process process-alist)
1520 ;; We use the text property `proced-pid' to store in each line
1521 ;; the corresponding pid
1522 (put-text-property (point) (line-end-position) 'proced-pid (car process))
1523 (forward-line))
1524 ;; Set header line
1525 (setq proced-header-line
1526 (mapconcat 'identity (nreverse header-list) whitespace))
1528 (setq proced-header-line (substring proced-header-line 0
1529 (match-beginning 0))))
1530 ;; (delete-trailing-whitespace)
1531 (goto-char (point-min))
1533 (delete-region (match-beginning 0) (match-end 0)))))
1535 (defun proced-format-interactive (scheme &optional revert)
1536 "Format Proced buffer using SCHEME.
1537 When called interactively, an empty string means nil, i.e., no formatting.
1538 Set variable `proced-format' to SCHEME.
1539 With prefix REVERT non-nil revert listing."
1540 (interactive
1541 (let ((scheme (completing-read "Format: "
1542 proced-format-alist nil t)))
1543 (list (if (string= "" scheme) nil (intern scheme))
1544 current-prefix-arg)))
1545 ;; only update if necessary
1546 (when (or (not (eq proced-format scheme)) revert)
1547 (setq proced-format scheme)
1548 (proced-update revert)))
1550 ;; generate listing
1552 (defun proced-process-attributes (&optional pid-list)
1553 "Return alist of attributes for each system process.
1554 This alist can be customized via `proced-custom-attributes'.
1555 Optional arg PID-LIST is a list of PIDs of system process that are analyzed.
1556 If no attributes are known for a process (possibly because it already died)
1557 the process is ignored."
1558 ;; Should we make it customizable whether processes with empty attribute
1559 ;; lists are ignored? When would such processes be of interest?
1560 (let (process-alist attributes attr)
1561 (dolist (pid (or pid-list (list-system-processes)) process-alist)
1562 (when (setq attributes (process-attributes pid))
1563 (setq attributes (cons (cons 'pid pid) attributes))
1564 (dolist (fun proced-custom-attributes)
1565 (if (setq attr (funcall fun attributes))
1566 (push attr attributes)))
1567 (push (cons pid attributes) process-alist)))))
1569 (defun proced-update (&optional revert quiet)
1570 "Update the Proced process information. Preserves point and marks.
1571 With prefix REVERT non-nil, revert listing.
1572 Suppress status information if QUIET is nil.
1573 After updating a displayed Proced buffer run the normal hook
1574 `proced-post-display-hook'."
1575 ;; This is the main function that generates and updates the process listing.
1576 (interactive "P")
1577 (setq revert (or revert (not proced-process-alist)))
1578 (or quiet (message (if revert "Updating process information..."
1579 "Updating process display...")))
1580 (if revert ;; evaluate all processes
1581 (setq proced-process-alist (proced-process-attributes)))
1582 ;; filtering and sorting
1583 (setq proced-process-alist
1584 (proced-sort (proced-filter proced-process-alist proced-filter)
1585 proced-sort proced-descend))
1587 ;; display as process tree?
1588 (setq proced-process-alist
1589 (proced-tree proced-process-alist))
1591 ;; It is useless to keep undo information if we revert, filter, or
1592 ;; refine the listing so that `proced-process-alist' has changed.
1593 ;; We could keep the undo information if we only re-sort the buffer.
1594 ;; Would that be useful? Re-re-sorting is easy, too.
1595 (if (consp buffer-undo-list)
1596 (setq buffer-undo-list nil))
1597 (let ((buffer-undo-list t)
1598 ;; If point is on a field, we try to return point to that field.
1599 ;; Otherwise we try to return to the same column
1600 (old-pos (let ((pid (proced-pid-at-point))
1601 (key (get-text-property (point) 'proced-key)))
1602 (list pid key ; can both be nil
1603 (if key
1604 (if (get-text-property (1- (point)) 'proced-key)
1605 (- (point) (previous-single-property-change
1606 (point) 'proced-key))
1607 0)
1608 (current-column)))))
1609 buffer-read-only mp-list)
1610 ;; remember marked processes (whatever the mark was)
1611 (goto-char (point-min))
1613 (push (cons (save-match-data (proced-pid-at-point))
1614 (match-string-no-properties 1)) mp-list))
1616 ;; generate listing
1617 (erase-buffer)
1618 (proced-format proced-process-alist proced-format)
1619 (goto-char (point-min))
1620 (while (not (eobp))
1621 (insert " ")
1622 (forward-line))
1623 (setq proced-header-line (concat " " proced-header-line))
1624 (if revert (set-buffer-modified-p nil))
1626 ;; set `goal-column'
1627 (let ((grammar (assq proced-goal-attribute proced-grammar-alist)))
1628 (setq goal-column ;; set to nil if no match
1629 (if (and grammar
1630 (not (zerop (buffer-size)))
1631 (string-match (regexp-quote (nth 1 grammar))
1632 proced-header-line))
1633 (if (nth 3 grammar)
1634 (match-beginning 0)
1635 (match-end 0)))))
1637 ;; Restore process marks and buffer position (if possible).
1638 ;; Sometimes this puts point in the middle of the proced buffer
1639 ;; where it is not interesting. Is there a better / more flexible solution?
1640 (goto-char (point-min))
1641 (let (pid mark new-pos)
1642 (if (or mp-list (car old-pos))
1643 (while (not (eobp))
1644 (setq pid (proced-pid-at-point))
1645 (when (setq mark (assq pid mp-list))
1646 (insert (cdr mark))
1647 (delete-char 1)
1648 (beginning-of-line))
1649 (when (eq (car old-pos) pid)
1650 (if (nth 1 old-pos)
1651 (let ((limit (line-end-position)) pos)
1652 (while (and (not new-pos)
1653 (setq pos (next-property-change (point) nil limit)))
1654 (goto-char pos)
1655 (when (eq (nth 1 old-pos)
1656 (get-text-property (point) 'proced-key))
1657 (forward-char (min (nth 2 old-pos)
1658 (- (next-property-change (point))
1659 (point))))
1660 (setq new-pos (point))))
1661 (unless new-pos
1662 ;; we found the process, but the field of point
1663 ;; is not listed anymore
1664 (setq new-pos (proced-move-to-goal-column))))
1665 (setq new-pos (min (+ (line-beginning-position) (nth 2 old-pos))
1666 (line-end-position)))))
1667 (forward-line)))
1668 (if new-pos
1669 (goto-char new-pos)
1670 (goto-char (point-min))
1671 (proced-move-to-goal-column)))
1672 ;; update mode line
1673 ;; Does the long `mode-name' clutter the mode line? It would be nice
1674 ;; to have some other location for displaying the values of the various
1675 ;; flags that affect the behavior of proced (flags one might want
1676 ;; to change on the fly). Where??
1677 (setq mode-name
1678 (concat "Proced"
1679 (if proced-filter
1680 (concat ": " (symbol-name proced-filter))
1681 "")
1682 (if proced-sort
1683 (let* ((key (if (consp proced-sort) (car proced-sort)
1684 proced-sort))
1685 (grammar (assq key proced-grammar-alist)))
1686 (concat " by " (if proced-descend "-" "+")
1687 (nth 1 grammar)))
1688 "")))
1689 (force-mode-line-update)
1690 ;; run `proced-post-display-hook' only for a displayed buffer.
1691 (if (get-buffer-window) (run-hooks 'proced-post-display-hook))
1692 ;; done
1693 (or quiet (input-pending-p)
1694 (message (if revert "Updating process information...done."
1695 "Updating process display...done.")))))
1697 (defun proced-revert (&rest _args)
1698 "Reevaluate the process listing based on the currently running processes.
1699 Preserves point and marks."
1700 (proced-update t))
1702 (defun proced-marked-processes ()
1703 "Return marked processes as alist of PIDs.
1704 If no process is marked return alist with the PID of the process point is on.
1705 The cdrs of the alist are the text strings displayed by Proced for these
1706 processes. They are used for error messages."
1707 (let ((regexp (proced-marker-regexp))
1708 process-alist)
1709 ;; collect marked processes
1710 (save-excursion
1711 (goto-char (point-min))
1712 (while (re-search-forward regexp nil t)
1713 (push (cons (proced-pid-at-point)
1714 ;; How much info should we collect here?
1715 (buffer-substring-no-properties
1716 (+ 2 (line-beginning-position))
1717 (line-end-position)))
1718 process-alist)))
1719 (if process-alist
1720 (nreverse process-alist)
1721 ;; take current process
1722 (let ((pid (proced-pid-at-point)))
1723 (if pid
1724 (list (cons pid
1725 (buffer-substring-no-properties
1726 (+ 2 (line-beginning-position))
1727 (line-end-position)))))))))
1729 (defmacro proced-with-processes-buffer (process-alist &rest body)
1730 "Execute the forms in BODY in a temporary buffer displaying PROCESS-ALIST.
1731 PROCESS-ALIST is an alist of process PIDs as in `proced-process-alist'.
1732 The value returned is the value of the last form in BODY."
1733 (declare (indent 1) (debug t))
1734 ;; Use leading space in buffer name to make this buffer ephemeral
1735 `(let ((bufname " *Marked Processes*")
1736 (header-line (substring-no-properties proced-header-line)))
1737 (with-current-buffer (get-buffer-create bufname)
1738 (setq truncate-lines t
1739 proced-header-line header-line ; inherit header line
1740 header-line-format '(:eval (proced-header-line)))
1741 (add-hook 'post-command-hook 'force-mode-line-update nil t)
1742 (let ((inhibit-read-only t))
1743 (erase-buffer)
1744 (buffer-disable-undo)
1745 (setq buffer-read-only t)
1746 (dolist (process ,process-alist)
1748 (delete-char -1)
1749 (goto-char (point-min)))
1750 (save-window-excursion
1751 ;; Analogous to `dired-pop-to-buffer'
1752 ;; Don't split window horizontally. (Bug#1806)
1753 (let (split-width-threshold)
1754 (pop-to-buffer (current-buffer)))
1755 (fit-window-to-buffer (get-buffer-window) nil 1)
1756 ,@body))))
1758 (defun proced-send-signal (&optional signal process-alist)
1759 "Send a SIGNAL to processes in PROCESS-ALIST.
1760 PROCESS-ALIST is an alist as returned by `proced-marked-processes'.
1761 Interactively, PROCESS-ALIST contains the marked processes.
1762 If no process is marked, it contains the process point is on,
1763 SIGNAL may be a string (HUP, INT, TERM, etc.) or a number.
1764 After sending SIGNAL to all processes in PROCESS-ALIST, this command
1765 runs the normal hook `proced-after-send-signal-hook'.
1767 For backward compatibility SIGNAL and PROCESS-ALIST may be nil.
1768 Then PROCESS-ALIST contains the marked processes or the process point is on
1769 and SIGNAL is queried interactively. This noninteractive usage is still
1770 supported but discouraged. It will be removed in a future version of Emacs."
1771 (interactive
1772 (let* ((process-alist (proced-marked-processes))
1773 (pnum (if (= 1 (length process-alist))
1774 "1 process"
1775 (format "%d processes" (length process-alist))))
1776 (completion-ignore-case t)
1777 (completion-extra-properties
1778 '(:annotation-function
1779 (lambda (s) (cdr (assoc s proced-signal-list))))))
1780 (proced-with-processes-buffer process-alist
1781 (list (completing-read (concat "Send signal [" pnum
1782 "] (default TERM): ")
1783 proced-signal-list
1784 nil nil nil nil "TERM")
1785 process-alist))))
1787 (unless (and signal process-alist)
1788 ;; Discouraged usage (supported for backward compatibility):
1789 ;; The new calling sequence separates more cleanly between the parts
1790 ;; of the code required for interactive and noninteractive calls so that
1791 ;; the command can be used more flexibly in noninteractive ways, too.
1792 (unless (get 'proced-send-signal 'proced-outdated)
1793 (put 'proced-send-signal 'proced-outdated t)
1794 (message "Outdated usage of `proced-send-signal'")
1795 (sit-for 2))
1796 (setq process-alist (proced-marked-processes))
1797 (unless signal
1798 (let ((pnum (if (= 1 (length process-alist))
1799 "1 process"
1800 (format "%d processes" (length process-alist))))
1801 (completion-ignore-case t)
1802 (completion-extra-properties
1803 '(:annotation-function
1804 (lambda (s) (cdr (assoc s proced-signal-list))))))
1805 (proced-with-processes-buffer process-alist
1806 (setq signal (completing-read (concat "Send signal [" pnum
1807 "] (default TERM): ")
1808 proced-signal-list
1809 nil nil nil nil "TERM"))))))
1811 (let (failures)
1812 ;; Why not always use `signal-process'? See
1813 ;; http://lists.gnu.org/archive/html/emacs-devel/2008-03/msg02955.html
1814 (if (functionp proced-signal-function)
1815 ;; use built-in `signal-process'
1816 (let ((signal (if (stringp signal)
1818 (string-to-number signal)
1819 (make-symbol signal))
1820 signal))) ; number
1821 (dolist (process process-alist)
1822 (condition-case err
1823 (unless (zerop (funcall
1824 proced-signal-function (car process) signal))
1826 (push (cdr process) failures))
1827 (error ; catch errors from failed signals
1830 (push (cdr process) failures)))))
1831 ;; use external system call
1832 (let ((signal (format "-%s" signal)))
1833 (dolist (process process-alist)
1834 (with-temp-buffer
1835 (condition-case nil
1836 (unless (zerop (call-process
1837 proced-signal-function nil t nil
1838 signal (number-to-string (car process))))
1839 (proced-log (current-buffer))
1841 (push (cdr process) failures))
1842 (error ; catch errors from failed signals
1843 (proced-log (current-buffer))
1845 (push (cdr process) failures)))))))
1846 (if failures
1847 ;; Proced error message are not always very precise.
1848 ;; Can we issue a useful one-line summary in the
1849 ;; message area (using FAILURES) if only one signal failed?
1850 (proced-log-summary
1851 (format "Signal %s" signal)
1852 (format "%d of %d signal%s failed"
1853 (length failures) (length process-alist)
1854 (if (= 1 (length process-alist)) "" "s")))
1855 (proced-success-message "Sent signal to" (length process-alist))))
1856 ;; final clean-up
1857 (run-hooks 'proced-after-send-signal-hook))
1859 (defun proced-renice (priority process-alist)
1860 "Renice the processes in PROCESS-ALIST to PRIORITY.
1861 PROCESS-ALIST is an alist as returned by `proced-marked-processes'.
1862 Interactively, PROCESS-ALIST contains the marked processes.
1863 If no process is marked, it contains the process point is on,
1864 After renicing all processes in PROCESS-ALIST, this command runs
1865 the normal hook `proced-after-send-signal-hook'."
1866 (interactive
1867 (let ((process-alist (proced-marked-processes)))
1868 (proced-with-processes-buffer process-alist
1869 (list (read-number "New priority: ")
1870 process-alist))))
1871 (if (numberp priority)
1872 (setq priority (number-to-string priority)))
1873 (let (failures)
1874 (dolist (process process-alist)
1875 (with-temp-buffer
1876 (condition-case nil
1877 (unless (zerop (call-process
1878 proced-renice-command nil t nil
1879 priority (number-to-string (car process))))
1880 (proced-log (current-buffer))
1882 (push (cdr process) failures))
1883 (error ; catch errors from failed renice
1884 (proced-log (current-buffer))
1886 (push (cdr process) failures)))))
1887 (if failures
1888 (proced-log-summary
1889 (format "Renice %s" priority)
1890 (format "%d of %d renice%s failed"
1891 (length failures) (length process-alist)
1892 (if (= 1 (length process-alist)) "" "s")))
1893 (proced-success-message "Reniced" (length process-alist))))
1894 ;; final clean-up
1895 (run-hooks 'proced-after-send-signal-hook))
1897 ;; similar to `dired-why'
1898 (defun proced-why ()
1899 "Pop up a buffer with error log output from Proced.
1900 A group of errors from a single command ends with a formfeed.
1902 (interactive)
1903 (if (get-buffer proced-log-buffer)
1904 (save-selected-window
1905 ;; move `proced-log-buffer' to the front of the buffer list
1906 (select-window (display-buffer (get-buffer proced-log-buffer)))
1907 (setq truncate-lines t)
1908 (set-buffer-modified-p nil)
1909 (setq buffer-read-only t)
1910 (goto-char (point-max))
1911 (forward-line -1)
1912 (backward-page 1)
1913 (recenter 0))))
1915 ;; similar to `dired-log'
1916 (defun proced-log (log &rest args)
1917 "Log a message or the contents of a buffer.
1918 If LOG is a string and there are more args, it is formatted with
1920 End each bunch of errors with (proced-log t signal):
1921 this inserts the current time, buffer and signal at the start of the page,
1923 (let ((obuf (current-buffer)))
1924 (with-current-buffer (get-buffer-create proced-log-buffer)
1925 (goto-char (point-max))
1926 (let (buffer-read-only)
1927 (cond ((stringp log)
1928 (insert (if args
1929 (apply 'format log args)
1930 log)))
1931 ((bufferp log)
1932 (insert-buffer-substring log))
1933 ((eq t log)
1934 (backward-page 1)
1935 (unless (bolp)
1937 (insert (current-time-string)
1940 (goto-char (point-max))
1943 ;; similar to `dired-log-summary'
1944 (defun proced-log-summary (signal string)
1945 "State a summary of SIGNAL's failures, in echo area and log buffer.
1946 STRING is an overall summary of the failures."
1947 (message "Signal %s: %s--type ? for details" signal string)
1948 ;; Log a summary describing a bunch of errors.
1950 (proced-log t signal))
1952 (defun proced-help ()
1953 "Provide help for the Proced user."
1954 (interactive)
1955 (proced-why)
1956 (if (eq last-command 'proced-help)
1957 (describe-mode)
1958 (message proced-help-string)))
1960 (defun proced-undo ()
1961 "Undo in a Proced buffer.
1962 This doesn't recover killed processes, it just undoes changes in the Proced
1963 buffer. You can use it to recover marks."
1964 (interactive)
1965 (let (buffer-read-only)
1966 (undo))
1967 (message "Change in Proced buffer undone.
1968 Killed processes cannot be recovered by Emacs."))
1970 (provide 'proced)
1972 ;;; proced.el ends here