| blob | 8ed30a79681f93b638491a730b970e8c55ccaf4e |
1 ;;; proced.el --- operate on system processes like dired
3 ;; Copyright (C) 2008, 2009, 2010, 2011 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", "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."
85 ;; For which attributes can we use a fixed width of the output field?
86 ;; A fixed width speeds up formatting, yet it can make
87 ;; `proced-grammar-alist' system-dependent.
88 ;; (If proced runs like top(1) we want it to be fast.)
89 ;;
90 ;; If it is impossible / unlikely that an attribute has the same value
91 ;; for two processes, then sorting can be based on one ordinary (fast)
92 ;; predicate like `<'. Otherwise, a list of proced predicates can be used
93 ;; to refine the sort.
94 ;;
95 ;; It would be neat if one could temporarily override the following
96 ;; predefined rules.
132 ;;
133 ;; attributes defined by proced (see `proced-process-attributes')
137 ;; process tree
139 "Alist of rules for handling Proced attributes.
141 Each element has the form
143 (KEY NAME FORMAT JUSTIFY PREDICATE REVERSE SORT-SCHEME REFINER).
145 Symbol KEY is the car of a process attribute.
147 String NAME appears in the header line.
149 FORMAT specifies the format for displaying the attribute values. It can
150 be a string passed to `format'. It can be a function called with one
151 argument, the value of the attribute. The value nil means take as is.
153 If JUSTIFY is an integer, its modulus gives the width of the attribute
154 values formatted with FORMAT. If JUSTIFY is positive, NAME appears
155 right-justified, otherwise it appears left-justified. If JUSTIFY is 'left
156 or 'right, the field width is calculated from all field values in the listing.
157 If JUSTIFY is 'left, the field values are formatted left-justified and
158 right-justified otherwise.
160 PREDICATE is the predicate for sorting and filtering the process listing
161 based on attribute KEY. PREDICATE takes two arguments P1 and P2,
162 the corresponding attribute values of two processes. PREDICATE should
163 return 'equal if P1 has same rank like P2. Any other non-nil value says
165 If PREDICATE is nil the attribute cannot be sorted.
167 PREDICATE defines an ascending sort order. REVERSE is non-nil if the sort
168 order is descending.
170 SORT-SCHEME is a list (KEY1 KEY2 ...) defining a hierarchy of rules
171 for sorting the process listing. KEY1, KEY2, ... are KEYs appearing as cars
172 of `proced-grammar-alist'. First the PREDICATE of KEY1 is evaluated.
173 If it yields non-equal, it defines the sort order for the corresponding
174 processes. If it evaluates to 'equal the PREDICATE of KEY2 is evaluated, etc.
176 REFINER can be a list of flags (LESS-B EQUAL-B LARGER-B) used by the command
177 `proced-refine' (see there) to refine the listing based on attribute KEY.
178 This command compares the value of attribute KEY of every process with
179 the value of attribute KEY of the process at the position of point
180 using PREDICATE.
181 If PREDICATE yields non-nil, the process is accepted if LESS-B is non-nil.
182 If PREDICATE yields 'equal, the process is accepted if EQUAL-B is non-nil.
183 If PREDICATE yields nil, the process is accepted if LARGER-B is non-nil.
185 REFINER can also be a list (FUNCTION HELP-ECHO).
186 FUNCTION is called with one argument, the PID of the process at the position
187 of point. The function must return a list of PIDs that is used for the refined
188 listing. HELP-ECHO is a string that is shown when mouse is over this field.
190 If REFINER is nil no refinement is done."
218 "List of functions defining custom attributes.
219 This variable extends the functionality of `proced-process-attributes'.
220 Each function is called with one argument, the list of attributes
221 of a system process. It returns a cons cell of the form (KEY . VALUE)
222 like `process-attributes'. This cons cell is appended to the list
223 returned by `proced-process-attributes'.
224 If the function returns nil, the value is ignored."
228 ;; Formatting and sorting rules are defined "per attribute". If formatting
229 ;; and / or sorting should use more than one attribute, it appears more
230 ;; transparent to define a new derived attribute, so that formatting and
231 ;; sorting can use them consistently. (Are there exceptions to this rule?
232 ;; Would it be advantageous to have yet more general methods available?)
233 ;; Sorting can also be based on attributes that are invisible in the listing.
241 state thcount vsize rss ttname tpgid minflt majflt cminflt cmajflt
243 "Alist of formats of listing.
244 The car of each element is a symbol, the name of the format.
245 The cdr is a list of attribute keys appearing in `proced-grammar-alist'.
246 An element of this list may also be a list of attribute keys that specifies
247 alternatives. If the first attribute is absent for a process, use the second
248 one, etc."
257 "Current format of Proced listing.
258 It can be the car of an element of `proced-format-alist'.
259 It can also be a list of keys appearing in `proced-grammar-alist'."
265 ;; FIXME: is there a better name for filter `user' that does not coincide
266 ;; with an attribute key?
275 "Alist of process filters.
276 The car of each element is a symbol, the name of the filter.
277 The cdr is a list of elementary filters that are applied to every process.
278 A process is displayed if it passes all elementary filters of a selected
279 filter.
281 An elementary filter can be one of the following:
282 \(KEY . REGEXP) If value of attribute KEY matches REGEXP,
283 accept this process.
284 \(KEY . FUN) Apply function FUN to attribute KEY. Accept this process,
285 if FUN returns non-nil.
286 \(function . FUN) For each process, apply function FUN to list of attributes
287 of each. Accept the process if FUN returns non-nil.
288 \(fun-all . FUN) Apply function FUN to entire process list.
289 FUN must return the filtered list."
300 "Current filter of proced listing.
301 It can be the car of an element of `proced-filter-alist'.
302 It can also be a list of elementary filters as in the cdrs of the elements
303 of `proced-filter-alist'."
314 "Current sort scheme for proced listing.
315 It must be the KEY of an element of `proced-grammar-alist'.
316 It can also be a list of KEYs as in the SORT-SCHEMEs of the elements
317 of `proced-grammar-alist'."
324 "Non-nil if proced listing is sorted in descending order."
330 "If non-nil, key of the attribute that defines the `goal-column'."
336 "Time interval in seconds for auto updating Proced buffers."
341 "Non-nil for auto update of a Proced buffer.
342 Can be changed interactively via `proced-toggle-auto-update'."
348 "Non-nil for display of Proced buffer as process tree."
354 "Normal hook run after displaying or updating a Proced buffer.
355 May be used to adapt the window size via `fit-window-to-buffer'."
361 "Normal hook run after sending a signal to processes by `proced-send-signal'.
362 May be used to revert the process listing."
367 ;; Internal variables
373 "Alist of processes displayed by Proced.
374 The car of each element is the PID, and the cdr is a list of
379 "Sort scheme for listing (internal format).
385 ;; Faces and font-lock code taken from dired,
386 ;; but face variables are deprecated for new code.
388 "Faces used by Proced."
394 "Face used for Proced marks."
399 "Face used for marked processes."
404 "Face used for header of attribute used for sorting."
408 "Regexp matching a marked line.
431 "(n)ext, (p)revious, (m)ark, (u)nmark, (k)ill, (q)uit (type ? for more help)"
435 "mouse-1, mouse-2: sort by attribute %s%s (%s)"
439 "mouse-2, RET: refine by attribute %s %s"
445 ;; Processes marked with `proced-marker-char'
446 ;; Should we make sure that only certain attributes are font-locked?
452 ;; moving
460 (define-key km [up] 'previous-line)
461 ;; marking
462 (define-key km "d" 'proced-mark) ; Dired compatibility ("delete")
463 (define-key km "m" 'proced-mark)
464 (put 'proced-mark :advertised-binding "m")
465 (define-key km "u" 'proced-unmark)
467 (define-key km "M" 'proced-mark-all)
468 (define-key km "U" 'proced-unmark-all)
469 (define-key km "t" 'proced-toggle-marks)
470 (define-key km "C" 'proced-mark-children)
471 (define-key km "P" 'proced-mark-parents)
472 ;; filtering
473 (define-key km "f" 'proced-filter-interactive)
474 (define-key km [mouse-2] 'proced-refine)
475 (define-key km "\C-m" 'proced-refine)
476 ;; sorting
477 (define-key km "sc" 'proced-sort-pcpu)
478 (define-key km "sm" 'proced-sort-pmem)
479 (define-key km "sp" 'proced-sort-pid)
480 (define-key km "ss" 'proced-sort-start)
481 (define-key km "sS" 'proced-sort-interactive)
482 (define-key km "st" 'proced-sort-time)
483 (define-key km "su" 'proced-sort-user)
484 ;; similar to `Buffer-menu-sort-by-column'
485 (define-key km [header-line mouse-1] 'proced-sort-header)
486 (define-key km [header-line mouse-2] 'proced-sort-header)
487 (define-key km "T" 'proced-toggle-tree)
488 ;; formatting
489 (define-key km "F" 'proced-format-interactive)
490 ;; operate
491 (define-key km "o" 'proced-omit-processes)
492 (define-key km "x" 'proced-send-signal) ; Dired compatibility
493 (define-key km "k" 'proced-send-signal) ; kill processes
494 ;; misc
495 (define-key km "h" 'describe-mode)
496 (define-key km "?" 'proced-help)
497 (define-key km [remap undo] 'proced-undo)
498 (define-key km [remap advertised-undo] 'proced-undo)
499 ;; Additional keybindings are inherited from `special-mode-map'
500 km)
501 "Keymap for Proced commands.")
503 (easy-menu-define
504 proced-menu proced-mode-map "Proced Menu"
505 `("Proced"
506 ["Mark" proced-mark
507 :help "Mark Current Process"]
508 ["Unmark" proced-unmark
509 :help "Unmark Current Process"]
510 ["Mark All" proced-mark-all
511 :help "Mark All Processes"]
512 ["Unmark All" proced-unmark-all
513 :help "Unmark All Process"]
514 ["Toggle Marks" proced-toggle-marks
515 :help "Marked Processes Become Unmarked, and Vice Versa"]
516 ["Mark Children" proced-mark-children
517 :help "Mark Current Process and its Children"]
518 ["Mark Parents" proced-mark-parents
519 :help "Mark Current Process and its Parents"]
520 "--"
521 ("Filters"
522 :help "Select Filter for Process Listing"
523 ,@(mapcar (lambda (el)
524 (let ((filter (car el)))
525 `[,(symbol-name filter)
526 (proced-filter-interactive ',filter)
527 :style radio
528 :selected (eq proced-filter ',filter)]))
529 proced-filter-alist))
530 ("Sorting"
531 :help "Select Sort Scheme"
532 ["Sort..." proced-sort-interactive
533 :help "Sort Process List"]
534 "--"
535 ["Sort by %CPU" proced-sort-pcpu]
536 ["Sort by %MEM" proced-sort-pmem]
537 ["Sort by PID" proced-sort-pid]
538 ["Sort by START" proced-sort-start]
539 ["Sort by TIME" proced-sort-time]
540 ["Sort by USER" proced-sort-user])
541 ("Formats"
542 :help "Select Format for Process Listing"
543 ,@(mapcar (lambda (el)
544 (let ((format (car el)))
545 `[,(symbol-name format)
546 (proced-format-interactive ',format)
547 :style radio
548 :selected (eq proced-format ',format)]))
549 proced-format-alist))
550 ["Tree Display" proced-toggle-tree
551 :style toggle
552 :selected (eval proced-tree-flag)
553 :help "Display Proced Buffer as Process Tree"]
554 "--"
555 ["Omit Marked Processes" proced-omit-processes
556 :help "Omit Marked Processes in Process Listing."]
557 "--"
558 ["Revert" revert-buffer
559 :help "Revert Process Listing"]
560 ["Auto Update" proced-toggle-auto-update
561 :style toggle
562 :selected (eval proced-auto-update-flag)
563 :help "Auto Update of Proced Buffer"]
564 ["Send signal" proced-send-signal
565 :help "Send Signal to Marked Processes"]))
567 ;; helper functions
568 (defun proced-marker-regexp ()
569 "Return regexp matching `proced-marker-char'."
570 ;; `proced-marker-char' must appear in column zero
571 (concat "^" (regexp-quote (char-to-string proced-marker-char))))
573 (defun proced-success-message (action count)
574 "Display success message for ACTION performed for COUNT processes."
575 (message "%s %s process%s" action count (if (= 1 count) "" "es")))
577 ;; Unlike dired, we do not define our own commands for vertical motion.
578 ;; If `goal-column' is set, `next-line' and `previous-line' are fancy
579 ;; commands to satisfy our modest needs. If `proced-goal-attribute'
580 ;; and/or `goal-column' are not set, `next-line' and `previous-line'
581 ;; are really what we need to preserve the column of point.
582 ;; We use `proced-move-to-goal-column' for "non-interactive" cases only
583 ;; to get a well-defined position of point.
585 (defun proced-move-to-goal-column ()
586 "Move to `goal-column' if non-nil. Return position of point."
587 (beginning-of-line)
588 (unless (eobp)
589 (if goal-column
590 (forward-char goal-column)
591 (forward-char 2)))
592 (point))
594 (defun proced-header-line ()
595 "Return header line for Proced buffer."
596 (list (propertize " " 'display '(space :align-to 0))
597 (if (<= (window-hscroll) (length proced-header-line))
598 (replace-regexp-in-string ;; preserve text properties
600 (substring proced-header-line (window-hscroll))))))
602 (defun proced-pid-at-point ()
603 "Return pid of system process at point.
604 Return nil if point is not on a process line."
605 (save-excursion
606 (beginning-of-line)
607 (if (looking-at "^. .")
608 (get-text-property (match-end 0) 'proced-pid))))
610 ;; proced mode
612 (define-derived-mode proced-mode special-mode "Proced"
613 "Mode for displaying system processes and sending signals to them.
618 The initial content of a listing is defined by the variable `proced-filter'
619 and the variable `proced-format'.
620 The variable `proced-filter' specifies which system processes are displayed.
621 The variable `proced-format' specifies which attributes are displayed for
623 to change the values of `proced-filter' and `proced-format'.
624 The current value of the variable `proced-filter' is indicated in the
625 mode line.
627 The sort order of Proced listings is defined by the variable `proced-sort'.
629 to change the sort scheme. The current sort scheme is indicated in the
633 displayed as process tree.
636 Refining an existing listing does not update the variable `proced-filter'.
638 The attribute-specific rules for formatting, filtering, sorting, and refining
639 are defined in `proced-grammar-alist'.
641 After displaying or updating a Proced buffer, Proced runs the normal hook
642 `proced-post-display-hook'.
645 (abbrev-mode 0)
646 (auto-fill-mode 0)
647 (setq buffer-read-only t
648 truncate-lines t
649 header-line-format '(:eval (proced-header-line)))
650 (add-hook 'post-command-hook 'force-mode-line-update nil t)
651 (set (make-local-variable 'revert-buffer-function) 'proced-revert)
652 (set (make-local-variable 'font-lock-defaults)
653 '(proced-font-lock-keywords t nil nil beginning-of-line))
654 (if (and (not proced-auto-update-timer) proced-auto-update-interval)
655 (setq proced-auto-update-timer
656 (run-at-time t proced-auto-update-interval
657 'proced-auto-update-timer))))
659 ;;;###autoload
660 (defun proced (&optional arg)
661 "Generate a listing of UNIX system processes.
662 If invoked with optional ARG the window displaying the process
663 information will be displayed but not selected.
664 Runs the normal hook `proced-post-display-hook'.
666 See `proced-mode' for a description of features available in Proced buffers."
667 (interactive "P")
668 (unless proced-available
669 (error "Proced is not available on this system"))
670 (let ((buffer (get-buffer-create "*Proced*")) new)
671 (set-buffer buffer)
672 (setq new (zerop (buffer-size)))
673 (when new
674 (proced-mode)
675 ;; `proced-update' runs `proced-post-display-hook' only if the
676 ;; Proced buffer has been selected. Yet the following call of
677 ;; `proced-update' is for an empty Proced buffer that has not
678 ;; yet been selected. Therefore we need to call
679 ;; `proced-post-display-hook' below.
680 (proced-update t))
681 (if arg
682 (progn
683 (display-buffer buffer)
684 (with-current-buffer buffer
685 (proced-update t)))
686 (pop-to-buffer buffer)
687 (proced-update t)
688 (message
689 (substitute-command-keys
692 (defun proced-auto-update-timer ()
693 "Auto-update Proced buffers using `run-at-time'."
694 (dolist (buf (buffer-list))
695 (with-current-buffer buf
696 (if (and (eq major-mode 'proced-mode)
697 proced-auto-update-flag)
698 (proced-update t t)))))
700 (defun proced-toggle-auto-update (arg)
701 "Change whether this Proced buffer is updated automatically.
702 With prefix ARG, update this buffer automatically if ARG is positive,
703 otherwise do not update. Sets the variable `proced-auto-update-flag'.
704 The time interval for updates is specified via `proced-auto-update-interval'."
705 (interactive (list (or current-prefix-arg 'toggle)))
706 (setq proced-auto-update-flag
707 (cond ((eq arg 'toggle) (not proced-auto-update-flag))
708 (arg (> (prefix-numeric-value arg) 0))
709 (t (not proced-auto-update-flag))))
710 (message "Proced auto update %s"
711 (if proced-auto-update-flag "enabled" "disabled")))
713 ;;; Mark
715 (defun proced-mark (&optional count)
716 "Mark the current (or next COUNT) processes."
717 (interactive "p")
718 (proced-do-mark t count))
720 (defun proced-unmark (&optional count)
721 "Unmark the current (or next COUNT) processes."
722 (interactive "p")
723 (proced-do-mark nil count))
725 (defun proced-unmark-backward (&optional count)
726 "Unmark the previous (or COUNT previous) processes."
727 ;; Analogous to `dired-unmark-backward',
728 ;; but `ibuffer-unmark-backward' behaves different.
729 (interactive "p")
730 (proced-do-mark nil (- (or count 1))))
732 (defun proced-do-mark (mark &optional count)
733 "Mark the current (or next COUNT) processes using MARK."
734 (or count (setq count 1))
735 (let ((backward (< count 0))
736 buffer-read-only)
737 (setq count (1+ (if (<= 0 count) count
738 (min (1- (line-number-at-pos)) (abs count)))))
739 (beginning-of-line)
740 (while (not (or (zerop (setq count (1- count))) (eobp)))
741 (proced-insert-mark mark backward))
742 (proced-move-to-goal-column)))
744 (defun proced-toggle-marks ()
745 "Toggle marks: marked processes become unmarked, and vice versa."
746 (interactive)
747 (let ((mark-re (proced-marker-regexp))
748 buffer-read-only)
749 (save-excursion
750 (goto-char (point-min))
751 (while (not (eobp))
752 (cond ((looking-at mark-re)
753 (proced-insert-mark nil))
754 ((looking-at " ")
755 (proced-insert-mark t))
756 (t
757 (forward-line 1)))))))
759 (defun proced-insert-mark (mark &optional backward)
760 "If MARK is non-nil, insert `proced-marker-char'.
761 If BACKWARD is non-nil, move one line backwards before inserting the mark.
762 Otherwise move one line forward after inserting the mark."
763 (if backward (forward-line -1))
764 (insert (if mark proced-marker-char ?\s))
765 (delete-char 1)
766 (unless backward (forward-line)))
768 (defun proced-mark-all ()
769 "Mark all processes.
770 If `transient-mark-mode' is turned on and the region is active,
771 mark the region."
772 (interactive)
773 (proced-do-mark-all t))
775 (defun proced-unmark-all ()
776 "Unmark all processes.
777 If `transient-mark-mode' is turned on and the region is active,
778 unmark the region."
779 (interactive)
780 (proced-do-mark-all nil))
782 (defun proced-do-mark-all (mark)
783 "Mark all processes using MARK.
784 If `transient-mark-mode' is turned on and the region is active,
785 mark the region."
786 (let* ((count 0)
787 (proced-marker-char (if mark proced-marker-char ?\s))
788 (marker-re (proced-marker-regexp))
789 end buffer-read-only)
790 (save-excursion
791 (if (use-region-p)
792 ;; Operate even on those lines that are only partially a part
793 ;; of region. This appears most consistent with
794 ;; `proced-move-to-goal-column'.
795 (progn (setq end (save-excursion
796 (goto-char (region-end))
797 (unless (looking-at "^") (forward-line))
798 (point)))
799 (goto-char (region-beginning))
800 (unless (looking-at "^") (beginning-of-line)))
801 (goto-char (point-min))
802 (setq end (point-max)))
803 (while (< (point) end)
804 (unless (looking-at marker-re)
805 (setq count (1+ count))
806 (insert proced-marker-char)
807 (delete-char 1))
808 (forward-line))
809 (proced-success-message (if mark "Marked" "Unmarked") count))))
811 (defun proced-mark-children (ppid &optional omit-ppid)
812 "Mark child processes of process PPID.
813 Also mark process PPID unless prefix OMIT-PPID is non-nil."
814 (interactive (list (proced-pid-at-point) current-prefix-arg))
815 (proced-mark-process-alist
816 (proced-filter-children proced-process-alist ppid omit-ppid)))
818 (defun proced-mark-parents (cpid &optional omit-cpid)
819 "Mark parent processes of process CPID.
820 Also mark CPID unless prefix OMIT-CPID is non-nil."
821 (interactive (list (proced-pid-at-point) current-prefix-arg))
822 (proced-mark-process-alist
823 (proced-filter-parents proced-process-alist cpid omit-cpid)))
825 (defun proced-mark-process-alist (process-alist &optional quiet)
826 "Mark processes in PROCESS-ALIST.
827 If QUIET is non-nil suppress status message."
828 (let ((count 0))
829 (if process-alist
830 (let (buffer-read-only)
831 (save-excursion
832 (goto-char (point-min))
833 (while (not (eobp))
834 (when (assq (proced-pid-at-point) process-alist)
835 (insert proced-marker-char)
836 (delete-char 1)
837 (setq count (1+ count)))
838 (forward-line)))))
839 (unless quiet
840 (proced-success-message "Marked" count))))
842 ;; Mostly analog of `dired-do-kill-lines'.
843 ;; However, for negative args the target lines of `dired-do-kill-lines'
844 ;; include the current line, whereas `dired-mark' for negative args operates
845 ;; on the preceding lines. Here we are consistent with `dired-mark'.
846 (defun proced-omit-processes (&optional arg quiet)
847 "Omit marked processes.
848 With prefix ARG, omit that many lines starting with the current line.
849 \(A negative argument omits backward.)
850 If `transient-mark-mode' is turned on and the region is active,
851 omit the processes in region.
852 If QUIET is non-nil suppress status message.
853 Returns count of omitted lines."
854 (interactive "P")
855 (let ((mark-re (proced-marker-regexp))
856 (count 0)
857 buffer-read-only)
858 (cond ((use-region-p) ;; Omit active region
859 (let ((lines (count-lines (region-beginning) (region-end))))
860 (save-excursion
861 (goto-char (region-beginning))
862 (while (< count lines)
863 (proced-omit-process)
864 (setq count (1+ count))))))
865 ((not arg) ;; Omit marked lines
866 (save-excursion
867 (goto-char (point-min))
868 (while (and (not (eobp))
869 (re-search-forward mark-re nil t))
870 (proced-omit-process)
871 (setq count (1+ count)))))
872 ((< 0 arg) ;; Omit forward
873 (while (and (not (eobp)) (< count arg))
874 (proced-omit-process)
875 (setq count (1+ count))))
876 ((< arg 0) ;; Omit backward
877 (while (and (not (bobp)) (< count (- arg)))
878 (forward-line -1)
879 (proced-omit-process)
880 (setq count (1+ count)))))
881 (unless (zerop count) (proced-move-to-goal-column))
882 (unless quiet (proced-success-message "Omitted" count))
883 count))
885 (defun proced-omit-process ()
886 "Omit process from listing point is on.
887 Update `proced-process-alist' accordingly."
888 (setq proced-process-alist
889 (assq-delete-all (proced-pid-at-point) proced-process-alist))
890 (delete-region (line-beginning-position)
891 (save-excursion (forward-line) (point))))
893 ;;; Filtering
895 (defun proced-filter (process-alist filter-list)
896 "Apply FILTER-LIST to PROCESS-ALIST.
897 Return the filtered process list."
898 (if (symbolp filter-list)
899 (setq filter-list (cdr (assq filter-list proced-filter-alist))))
900 (dolist (filter filter-list)
901 (let (new-alist)
902 (cond ( ;; apply function to entire process list
903 (eq (car filter) 'fun-all)
904 (setq new-alist (funcall (cdr filter) process-alist)))
905 ( ;; apply predicate to each list of attributes
906 (eq (car filter) 'function)
907 (dolist (process process-alist)
908 (if (funcall (car filter) (cdr process))
909 (push process new-alist))))
910 (t ;; apply predicate to specified attribute
911 (let ((fun (if (stringp (cdr filter))
912 `(lambda (val)
913 (string-match ,(cdr filter) val))
914 (cdr filter)))
915 value)
916 (dolist (process process-alist)
917 (setq value (cdr (assq (car filter) (cdr process))))
918 (if (and value (funcall fun value))
919 (push process new-alist))))))
920 (setq process-alist new-alist)))
921 process-alist)
923 (defun proced-filter-interactive (scheme)
924 "Filter Proced buffer using SCHEME.
925 When called interactively, an empty string means nil, i.e., no filtering.
926 Set variable `proced-filter' to SCHEME. Revert listing."
927 (interactive
928 (let ((scheme (completing-read "Filter: "
929 proced-filter-alist nil t)))
930 (list (if (string= "" scheme) nil (intern scheme)))))
931 ;; only update if necessary
932 (unless (eq proced-filter scheme)
933 (setq proced-filter scheme)
934 (proced-update t)))
936 (defun proced-filter-parents (process-alist pid &optional omit-pid)
937 "For PROCESS-ALIST return list of parent processes of PID.
938 This list includes PID unless OMIT-PID is non-nil."
939 (let ((parent-list (unless omit-pid (list (assq pid process-alist))))
940 (process (assq pid process-alist))
941 ppid)
942 (while (and (setq ppid (cdr (assq 'ppid (cdr process))))
943 ;; Ignore a PPID that equals PID.
944 (/= ppid pid)
945 ;; Accept only PPIDs that correspond to members in PROCESS-ALIST.
946 (setq process (assq ppid process-alist)))
947 (setq pid ppid)
948 (push process parent-list))
949 parent-list))
951 (defun proced-filter-children (process-alist ppid &optional omit-ppid)
952 "For PROCESS-ALIST return list of child processes of PPID.
953 This list includes PPID unless OMIT-PPID is non-nil."
954 (let ((proced-temp-alist (proced-children-alist process-alist))
955 new-alist)
956 (dolist (pid (proced-children-pids ppid))
957 (push (assq pid process-alist) new-alist))
958 (if omit-ppid
959 (assq-delete-all ppid new-alist)
960 new-alist)))
962 ;;; Process tree
964 (defun proced-children-alist (process-alist)
965 "Return children alist for PROCESS-ALIST.
966 The children alist has elements (PPID PID1 PID2 ...).
967 PPID is a parent PID. PID1, PID2, ... are the child processes of PPID.
968 The children alist inherits the sorting order of PROCESS-ALIST.
969 The list of children does not include grandchildren."
970 ;; The PPIDs inherit the sorting order of PROCESS-ALIST.
971 (let ((process-tree (mapcar (lambda (a) (list (car a))) process-alist))
972 ppid)
973 (dolist (process process-alist)
974 (setq ppid (cdr (assq 'ppid (cdr process))))
975 (if (and ppid
976 ;; Ignore a PPID that equals PID.
977 (/= ppid (car process))
978 ;; Accept only PPIDs that correspond to members in PROCESS-ALIST.
979 (assq ppid process-alist))
980 (let ((temp-alist process-tree) elt)
981 (while (setq elt (pop temp-alist))
982 (when (eq ppid (car elt))
983 (setq temp-alist nil)
984 (setcdr elt (cons (car process) (cdr elt))))))))
985 ;; The child processes inherit the sorting order of PROCESS-ALIST.
986 (setq process-tree
987 (mapcar (lambda (a) (cons (car a) (nreverse (cdr a))))
988 process-tree))))
990 (defun proced-children-pids (ppid)
991 "Return list of children PIDs of PPID (including PPID)."
992 (let ((cpids (cdr (assq ppid proced-temp-alist))))
993 (if cpids
994 (cons ppid (apply 'append (mapcar 'proced-children-pids cpids)))
995 (list ppid))))
997 (defun proced-process-tree (process-alist)
998 "Return process tree for PROCESS-ALIST.
999 It is an alist of alists where the car of each alist is a parent process
1000 and the cdr is a list of child processes according to the ppid attribute
1001 of these processes.
1002 The process tree inherits the sorting order of PROCESS-ALIST."
1003 (let ((proced-temp-alist (proced-children-alist process-alist))
1004 pid-alist proced-process-tree)
1005 (while (setq pid-alist (pop proced-temp-alist))
1006 (push (proced-process-tree-internal pid-alist) proced-process-tree))
1007 (nreverse proced-process-tree)))
1009 (defun proced-process-tree-internal (pid-alist)
1010 "Helper function for `proced-process-tree'."
1011 (let ((cpid-list (cdr pid-alist)) cpid-alist cpid)
1012 (while (setq cpid (car cpid-list))
1013 (if (setq cpid-alist (assq cpid proced-temp-alist))
1014 ;; Unprocessed part of process tree that needs to be
1015 ;; analyzed recursively.
1016 (progn
1017 (setq proced-temp-alist
1018 (assq-delete-all cpid proced-temp-alist))
1019 (setcar cpid-list (proced-process-tree-internal cpid-alist)))
1020 ;; We already processed this subtree and take it "as is".
1021 (setcar cpid-list (assq cpid proced-process-tree))
1022 (setq proced-process-tree
1023 (assq-delete-all cpid proced-process-tree)))
1024 (pop cpid-list)))
1025 pid-alist)
1027 (defun proced-toggle-tree (arg)
1028 "Toggle the display of the process listing as process tree.
1029 With prefix ARG, display as process tree if ARG is positive, otherwise
1030 do not display as process tree. Sets the variable `proced-tree-flag'.
1032 The process tree is generated from the selected processes in the
1033 Proced buffer (that is, the processes in `proced-process-alist').
1034 All processes that do not have a parent process in this list
1035 according to their ppid attribute become the root of a process tree.
1036 Each parent process is followed by its child processes.
1037 The process tree inherits the chosen sorting order of the process listing,
1038 that is, child processes of the same parent process are sorted using
1039 the selected sorting order."
1040 (interactive (list (or current-prefix-arg 'toggle)))
1041 (setq proced-tree-flag
1042 (cond ((eq arg 'toggle) (not proced-tree-flag))
1043 (arg (> (prefix-numeric-value arg) 0))
1044 (t (not proced-tree-flag))))
1045 (proced-update)
1046 (message "Proced process tree display %s"
1047 (if proced-tree-flag "enabled" "disabled")))
1049 (defun proced-tree (process-alist)
1050 "Rearrange PROCESS-ALIST as process tree.
1051 If `proced-tree-flag' is non-nil, rearrange PROCESS-ALIST such that
1052 every processes is followed by its child processes. Each process
1053 gets a tree attribute that specifies the depth of the process in the tree.
1054 A root process is a process with no parent within PROCESS-ALIST according
1055 to its value of the ppid attribute. It has depth 0.
1057 If `proced-tree-flag' is nil, remove the tree attribute.
1058 Return the rearranged process list."
1059 (if proced-tree-flag
1060 ;; add tree attribute
1061 (let ((process-tree (proced-process-tree process-alist))
1062 (proced-tree-depth 0)
1063 (proced-temp-alist process-alist)
1064 proced-process-tree pt)
1065 (while (setq pt (pop process-tree))
1066 (proced-tree-insert pt))
1067 (nreverse proced-process-tree))
1068 ;; remove tree attribute
1069 (let ((process-alist process-alist))
1070 (while process-alist
1071 (setcar process-alist
1072 (assq-delete-all 'tree (car process-alist)))
1073 (pop process-alist)))
1074 process-alist))
1076 (defun proced-tree-insert (process-tree)
1077 "Helper function for `proced-tree'."
1078 (let ((pprocess (assq (car process-tree) proced-temp-alist)))
1079 (push (append (list (car pprocess))
1080 (list (cons 'tree proced-tree-depth))
1081 (cdr pprocess))
1082 proced-process-tree)
1083 (if (cdr process-tree)
1084 (let ((proced-tree-depth (1+ proced-tree-depth)))
1085 (mapc 'proced-tree-insert (cdr process-tree))))))
1087 ;; Refining
1089 ;; Filters are used to select the processes in a new listing.
1090 ;; Refiners are used to narrow down further (interactively) the processes
1091 ;; in an existing listing.
1093 (defun proced-refine (&optional event)
1094 "Refine Proced listing by comparing with the attribute value at point.
1095 Optional EVENT is the location of the Proced field.
1097 Refinement is controlled by the REFINER defined for each attribute ATTR
1098 in `proced-grammar-alist'.
1100 If REFINER is a list of flags and point is on a process's value of ATTR,
1101 this command compares the value of ATTR of every process with the value
1102 of ATTR of the process at the position of point.
1104 The predicate for the comparison of two ATTR values is defined
1105 in `proced-grammar-alist'. For each return value of the predicate
1106 a refine flag is defined in `proced-grammar-alist'. One can select
1109 is included in the new listing if the refine flag for the corresponding
1110 return value of the predicate is non-nil.
1112 the current values of these refine flags.
1114 If REFINER is a cons pair (FUNCTION . HELP-ECHO), FUNCTION is called
1115 with one argument, the PID of the process at the position of point.
1116 The function must return a list of PIDs that is used for the refined
1117 listing. HELP-ECHO is a string that is shown when mouse is over this field.
1119 This command refines an already existing process listing generated initially
1120 based on the value of the variable `proced-filter'. It does not change
1121 this variable. It does not revert the listing. If you frequently need
1122 a certain refinement, consider defining a new filter in `proced-filter-alist'."
1123 (interactive (list last-input-event))
1124 (if event (posn-set-point (event-end event)))
1125 (let ((key (get-text-property (point) 'proced-key))
1126 (pid (get-text-property (point) 'proced-pid)))
1127 (if (and key pid)
1128 (let* ((grammar (assq key proced-grammar-alist))
1129 (refiner (nth 7 grammar)))
1130 (when refiner
1131 (cond ((functionp (car refiner))
1132 (setq proced-process-alist (funcall (car refiner) pid)))
1133 ((consp refiner)
1134 (let ((predicate (nth 4 grammar))
1135 (ref (cdr (assq key (cdr (assq pid proced-process-alist)))))
1136 val new-alist)
1137 (dolist (process proced-process-alist)
1138 (setq val (funcall predicate (cdr (assq key (cdr process))) ref))
1139 (if (cond ((not val) (nth 2 refiner))
1140 ((eq val 'equal) (nth 1 refiner))
1141 (val (car refiner)))
1142 (push process new-alist)))
1143 (setq proced-process-alist new-alist))))
1144 ;; Do not revert listing.
1145 (proced-update)))
1146 (message "No refiner defined here."))))
1148 ;; Proced predicates for sorting and filtering are based on a three-valued
1149 ;; logic:
1150 ;; Predicates take two arguments P1 and P2, the corresponding attribute
1151 ;; values of two processes. Predicates should return 'equal if P1 has
1152 ;; same rank like P2. Any other non-nil value says that P1 is "less than" P2,
1153 ;; or nil if not.
1155 (defun proced-< (num1 num2)
1156 "Return t if NUM1 less than NUM2.
1157 Return `equal' if NUM1 equals NUM2. Return nil if NUM1 greater than NUM2."
1158 (if (= num1 num2)
1159 'equal
1160 (< num1 num2)))
1162 (defun proced-string-lessp (s1 s2)
1163 "Return t if string S1 is less than S2 in lexicographic order.
1164 Return `equal' if S1 and S2 have identical contents.
1165 Return nil otherwise."
1166 (if (string= s1 s2)
1167 'equal
1168 (string-lessp s1 s2)))
1170 (defun proced-time-lessp (t1 t2)
1171 "Return t if time value T1 is less than time value T2.
1172 Return `equal' if T1 equals T2. Return nil otherwise."
1173 (with-decoded-time-value ((high1 low1 micro1 t1)
1174 (high2 low2 micro2 t2))
1175 (cond ((< high1 high2))
1176 ((< high2 high1) nil)
1177 ((< low1 low2))
1178 ((< low2 low1) nil)
1179 ((< micro1 micro2))
1180 ((< micro2 micro1) nil)
1181 (t 'equal))))
1183 ;;; Sorting
1185 (defsubst proced-xor (b1 b2)
1186 "Return the logical exclusive or of args B1 and B2."
1187 (and (or b1 b2)
1188 (not (and b1 b2))))
1190 (defun proced-sort-p (p1 p2)
1191 "Predicate for sorting processes P1 and P2."
1192 (if (not (cdr proced-sort-internal))
1193 ;; only one predicate: fast scheme
1194 (let* ((sorter (car proced-sort-internal))
1195 (k1 (cdr (assq (car sorter) (cdr p1))))
1196 (k2 (cdr (assq (car sorter) (cdr p2)))))
1197 ;; if the attributes are undefined, we should really abort sorting
1198 (if (and k1 k2)
1199 (proced-xor (funcall (nth 1 sorter) k1 k2)
1200 (nth 2 sorter))))
1201 (let ((sort-list proced-sort-internal) sorter predicate k1 k2)
1202 (catch 'done
1203 (while (setq sorter (pop sort-list))
1204 (setq k1 (cdr (assq (car sorter) (cdr p1)))
1205 k2 (cdr (assq (car sorter) (cdr p2)))
1206 predicate
1207 (if (and k1 k2)
1208 (funcall (nth 1 sorter) k1 k2)))
1209 (if (not (eq predicate 'equal))
1210 (throw 'done (proced-xor predicate (nth 2 sorter)))))
1211 (eq t predicate)))))
1213 (defun proced-sort (process-alist sorter descend)
1214 "Sort PROCESS-ALIST using scheme SORTER.
1215 SORTER is a scheme like `proced-sort'.
1216 DESCEND is non-nil if the first element of SORTER is sorted
1217 in descending order.
1218 Return the sorted process list."
1219 ;; translate SORTER into a list of lists (KEY PREDICATE REVERSE)
1220 (setq proced-sort-internal
1221 (mapcar (lambda (arg)
1222 (let ((grammar (assq arg proced-grammar-alist)))
1223 (unless (nth 4 grammar)
1224 (error "Attribute %s not sortable" (car grammar)))
1225 (list arg (nth 4 grammar) (nth 5 grammar))))
1226 (cond ((listp sorter) sorter)
1227 ((and (symbolp sorter)
1228 (nth 6 (assq sorter proced-grammar-alist))))
1229 ((symbolp sorter) (list sorter))
1230 (t (error "Sorter undefined %s" sorter)))))
1231 (if proced-sort-internal
1232 (progn
1233 ;; splice DESCEND into the list
1234 (setcar proced-sort-internal
1235 (list (caar proced-sort-internal)
1236 (nth 1 (car proced-sort-internal)) descend))
1237 (sort process-alist 'proced-sort-p))
1238 process-alist))
1240 (defun proced-sort-interactive (scheme &optional arg)
1241 "Sort Proced buffer using SCHEME.
1242 When called interactively, an empty string means nil, i.e., no sorting.
1244 Prefix ARG controls sort order:
1245 - If prefix ARG is positive (negative), sort in ascending (descending) order.
1246 - If ARG is nil or 'no-arg and SCHEME is equal to the previous sorting scheme,
1247 reverse the sorting order.
1248 - If ARG is nil or 'no-arg and SCHEME differs from the previous sorting scheme,
1249 adopt the sorting order defined for SCHEME in `proced-grammar-alist'.
1251 Set variable `proced-sort' to SCHEME. The current sort scheme is displayed
1253 (interactive
1254 (let* (choices
1255 (scheme (completing-read "Sort attribute: "
1256 (dolist (grammar proced-grammar-alist choices)
1257 (if (nth 4 grammar)
1258 (push (list (car grammar)) choices)))
1259 nil t)))
1260 (list (if (string= "" scheme) nil (intern scheme))
1261 ;; like 'toggle in `define-derived-mode'
1262 (or current-prefix-arg 'no-arg))))
1264 (setq proced-descend
1265 ;; If `proced-sort-interactive' is called repeatedly for the same
1266 ;; sort key, the sort order is reversed.
1267 (cond ((and (eq arg 'no-arg) (equal proced-sort scheme))
1268 (not proced-descend))
1269 ((eq arg 'no-arg)
1270 (nth 5 (assq (if (consp scheme) (car scheme) scheme)
1271 proced-grammar-alist)))
1272 (arg (< (prefix-numeric-value arg) 0))
1273 ((equal proced-sort scheme)
1274 (not proced-descend))
1275 (t (nth 5 (assq (if (consp scheme) (car scheme) scheme)
1276 proced-grammar-alist))))
1277 proced-sort scheme)
1278 (proced-update))
1280 (defun proced-sort-pcpu (&optional arg)
1281 "Sort Proced buffer by percentage CPU time (%CPU).
1282 Prefix ARG controls sort order, see `proced-sort-interactive'."
1283 (interactive (list (or current-prefix-arg 'no-arg)))
1284 (proced-sort-interactive 'pcpu arg))
1286 (defun proced-sort-pmem (&optional arg)
1287 "Sort Proced buffer by percentage memory usage (%MEM).
1288 Prefix ARG controls sort order, see `proced-sort-interactive'."
1289 (interactive (list (or current-prefix-arg 'no-arg)))
1290 (proced-sort-interactive 'pmem arg))
1292 (defun proced-sort-pid (&optional arg)
1293 "Sort Proced buffer by PID.
1294 Prefix ARG controls sort order, see `proced-sort-interactive'."
1295 (interactive (list (or current-prefix-arg 'no-arg)))
1296 (proced-sort-interactive 'pid arg))
1298 (defun proced-sort-start (&optional arg)
1299 "Sort Proced buffer by time the command started (START).
1300 Prefix ARG controls sort order, see `proced-sort-interactive'."
1301 (interactive (list (or current-prefix-arg 'no-arg)))
1302 (proced-sort-interactive 'start arg))
1304 (defun proced-sort-time (&optional arg)
1305 "Sort Proced buffer by CPU time (TIME).
1306 Prefix ARG controls sort order, see `proced-sort-interactive'."
1307 (interactive (list (or current-prefix-arg 'no-arg)))
1308 (proced-sort-interactive 'time arg))
1310 (defun proced-sort-user (&optional arg)
1311 "Sort Proced buffer by USER.
1312 Prefix ARG controls sort order, see `proced-sort-interactive'."
1313 (interactive (list (or current-prefix-arg 'no-arg)))
1314 (proced-sort-interactive 'user arg))
1316 (defun proced-sort-header (event &optional arg)
1317 "Sort Proced listing based on an attribute.
1318 EVENT is a mouse event with starting position in the header line.
1319 It is converted to the corresponding attribute key.
1320 This command updates the variable `proced-sort'.
1321 Prefix ARG controls sort order, see `proced-sort-interactive'."
1322 (interactive (list last-input-event (or last-prefix-arg 'no-arg)))
1323 (let ((start (event-start event))
1324 col key)
1325 (save-selected-window
1326 (select-window (posn-window start))
1327 (setq col (+ (1- (car (posn-actual-col-row start)))
1328 (window-hscroll)))
1329 (when (and (<= 0 col) (< col (length proced-header-line)))
1330 (setq key (get-text-property col 'proced-key proced-header-line))
1331 (if key
1332 (proced-sort-interactive key arg)
1333 (message "No sorter defined here."))))))
1335 ;;; Formating
1337 (defun proced-format-time (time)
1338 "Format time interval TIME."
1339 (let* ((ftime (float-time time))
1340 (days (truncate ftime 86400))
1341 (ftime (mod ftime 86400))
1342 (hours (truncate ftime 3600))
1343 (ftime (mod ftime 3600))
1344 (minutes (truncate ftime 60))
1345 (seconds (mod ftime 60)))
1346 (cond ((< 0 days)
1347 (format "%d-%02d:%02d:%02d" days hours minutes seconds))
1348 ((< 0 hours)
1349 (format "%02d:%02d:%02d" hours minutes seconds))
1350 (t
1351 (format "%02d:%02d" minutes seconds)))))
1353 (defun proced-format-start (start)
1354 "Format time START.
1355 The return string is always 6 characters wide."
1356 (let ((d-start (decode-time start))
1357 (d-current (decode-time)))
1358 (cond ( ;; process started in previous years
1359 (< (nth 5 d-start) (nth 5 d-current))
1360 (format-time-string " %Y" start))
1361 ;; process started today
1362 ((and (= (nth 3 d-start) (nth 3 d-current))
1363 (= (nth 4 d-start) (nth 4 d-current)))
1364 (format-time-string " %H:%M" start))
1365 (t ;; process started this year
1366 (format-time-string "%b %e" start)))))
1368 (defun proced-format-ttname (ttname)
1370 ;; Does this work for all systems?
1372 (match-end 0) 0)))
1374 (defun proced-format-tree (tree)
1375 "Format attribute TREE."
1376 (concat (make-string tree ?\s) (number-to-string tree)))
1378 ;; Proced assumes that every process occupies only one line in the listing.
1379 (defun proced-format-args (args)
1380 "Format attribute ARGS.
1384 (defun proced-format (process-alist format)
1385 "Display PROCESS-ALIST using FORMAT."
1386 (if (symbolp format)
1387 (setq format (cdr (assq format proced-format-alist))))
1389 ;; Not all systems give us all attributes. We take `emacs-pid' as a
1390 ;; representative process PID. If FORMAT contains a list of alternative
1391 ;; attributes, we take the first attribute that is non-nil for `emacs-pid'.
1392 ;; If none of the alternatives is non-nil, the attribute is ignored
1393 ;; in the listing.
1394 (let ((standard-attributes
1395 (car (proced-process-attributes (list (emacs-pid)))))
1396 new-format fmi)
1397 (if (and proced-tree-flag
1398 (assq 'ppid standard-attributes))
1399 (push (cons 'tree 0) standard-attributes))
1400 (dolist (fmt format)
1401 (if (symbolp fmt)
1402 (if (assq fmt standard-attributes)
1403 (push fmt new-format))
1404 (while (setq fmi (pop fmt))
1405 (when (assq fmi standard-attributes)
1406 (push fmi new-format)
1407 (setq fmt nil)))))
1408 (setq format (nreverse new-format)))
1411 (let ((whitespace " ") (unknown "?")
1412 (sort-key (if (consp proced-sort) (car proced-sort) proced-sort))
1413 header-list grammar)
1414 ;; Loop over all attributes
1415 (while (setq grammar (assq (pop format) proced-grammar-alist))
1416 (let* ((key (car grammar))
1417 (fun (cond ((stringp (nth 2 grammar))
1418 `(lambda (arg) (format ,(nth 2 grammar) arg)))
1419 ((not (nth 2 grammar)) 'identity)
1420 ( t (nth 2 grammar))))
1421 (whitespace (if format whitespace ""))
1422 ;; Text properties:
1423 ;; We use the text property `proced-key' to store in each
1424 ;; field the corresponding key.
1425 ;; Of course, the sort predicate appearing in help-echo
1426 ;; is only part of the story. But it gives the main idea.
1427 (hprops
1428 (if (nth 4 grammar)
1429 (let ((descend (if (eq key sort-key) proced-descend (nth 5 grammar))))
1430 `(proced-key ,key mouse-face highlight
1431 help-echo ,(format proced-header-help-echo
1432 (if descend "-" "+")
1433 (nth 1 grammar)
1434 (if descend "descending" "ascending"))))))
1435 (refiner (nth 7 grammar))
1436 (fprops
1437 (cond ((functionp (car refiner))
1438 `(proced-key ,key mouse-face highlight
1439 help-echo ,(format "mouse-2, RET: %s"
1440 (nth 1 refiner))))
1441 ((consp refiner)
1442 `(proced-key ,key mouse-face highlight
1443 help-echo ,(format "mouse-2, RET: refine by attribute %s %s"
1444 (nth 1 grammar)
1445 (mapconcat (lambda (s)
1446 (if s "+" "-"))
1447 refiner ""))))))
1448 value)
1450 ;; highlight the header of the sort column
1451 (if (eq key sort-key)
1452 (setq hprops (append '(face proced-sort-header) hprops)))
1453 (goto-char (point-min))
1454 (cond ( ;; fixed width of output field
1455 (numberp (nth 3 grammar))
1456 (dolist (process process-alist)
1457 (end-of-line)
1458 (setq value (cdr (assq key (cdr process))))
1459 (insert (if value
1460 (apply 'propertize (funcall fun value) fprops)
1461 (format (concat "%" (number-to-string (nth 3 grammar)) "s")
1462 unknown))
1463 whitespace)
1464 (forward-line))
1465 (push (format (concat "%" (number-to-string (nth 3 grammar)) "s")
1466 (apply 'propertize (nth 1 grammar) hprops))
1467 header-list))
1469 ( ;; last field left-justified
1470 (and (not format) (eq 'left (nth 3 grammar)))
1471 (dolist (process process-alist)
1472 (end-of-line)
1473 (setq value (cdr (assq key (cdr process))))
1474 (insert (if value (apply 'propertize (funcall fun value) fprops)
1475 unknown))
1476 (forward-line))
1477 (push (apply 'propertize (nth 1 grammar) hprops) header-list))
1479 (t ;; calculated field width
1480 (let ((width (length (nth 1 grammar)))
1481 field-list value)
1482 (dolist (process process-alist)
1483 (setq value (cdr (assq key (cdr process))))
1484 (if value
1485 (setq value (apply 'propertize (funcall fun value) fprops)
1486 width (max width (length value))
1487 field-list (cons value field-list))
1488 (push unknown field-list)
1489 (setq width (max width (length unknown)))))
1490 (let ((afmt (concat "%" (if (eq 'left (nth 3 grammar)) "-" "")
1491 (number-to-string width) "s")))
1492 (push (format afmt (apply 'propertize (nth 1 grammar) hprops))
1493 header-list)
1494 (dolist (value (nreverse field-list))
1495 (end-of-line)
1496 (insert (format afmt value) whitespace)
1497 (forward-line))))))))
1499 ;; final cleanup
1500 (goto-char (point-min))
1501 (dolist (process process-alist)
1502 ;; We use the text property `proced-pid' to store in each line
1503 ;; the corresponding pid
1504 (put-text-property (point) (line-end-position) 'proced-pid (car process))
1505 (forward-line))
1506 ;; Set header line
1507 (setq proced-header-line
1508 (mapconcat 'identity (nreverse header-list) whitespace))
1510 (setq proced-header-line (substring proced-header-line 0
1511 (match-beginning 0))))
1512 ;; (delete-trailing-whitespace)
1513 (goto-char (point-min))
1515 (delete-region (match-beginning 0) (match-end 0)))))
1517 (defun proced-format-interactive (scheme &optional revert)
1518 "Format Proced buffer using SCHEME.
1519 When called interactively, an empty string means nil, i.e., no formatting.
1520 Set variable `proced-format' to SCHEME.
1521 With prefix REVERT non-nil revert listing."
1522 (interactive
1523 (let ((scheme (completing-read "Format: "
1524 proced-format-alist nil t)))
1525 (list (if (string= "" scheme) nil (intern scheme))
1526 current-prefix-arg)))
1527 ;; only update if necessary
1528 (when (or (not (eq proced-format scheme)) revert)
1529 (setq proced-format scheme)
1530 (proced-update revert)))
1532 ;; generate listing
1534 (defun proced-process-attributes (&optional pid-list)
1535 "Return alist of attributes for each system process.
1536 This alist can be customized via `proced-custom-attributes'.
1537 Optional arg PID-LIST is a list of PIDs of system process that are analyzed.
1538 If no attributes are known for a process (possibly because it already died)
1539 the process is ignored."
1540 ;; Should we make it customizable whether processes with empty attribute
1541 ;; lists are ignored? When would such processes be of interest?
1542 (let (process-alist attributes attr)
1543 (dolist (pid (or pid-list (list-system-processes)) process-alist)
1544 (when (setq attributes (process-attributes pid))
1545 (setq attributes (cons (cons 'pid pid) attributes))
1546 (dolist (fun proced-custom-attributes)
1547 (if (setq attr (funcall fun attributes))
1548 (push attr attributes)))
1549 (push (cons pid attributes) process-alist)))))
1551 (defun proced-update (&optional revert quiet)
1552 "Update the Proced process information. Preserves point and marks.
1553 With prefix REVERT non-nil, revert listing.
1554 Suppress status information if QUIET is nil.
1555 After updating a displayed Proced buffer run the normal hook
1556 `proced-post-display-hook'."
1557 ;; This is the main function that generates and updates the process listing.
1558 (interactive "P")
1559 (setq revert (or revert (not proced-process-alist)))
1560 (or quiet (message (if revert "Updating process information..."
1561 "Updating process display...")))
1562 (if revert ;; evaluate all processes
1563 (setq proced-process-alist (proced-process-attributes)))
1564 ;; filtering and sorting
1565 (setq proced-process-alist
1566 (proced-sort (proced-filter proced-process-alist proced-filter)
1567 proced-sort proced-descend))
1569 ;; display as process tree?
1570 (setq proced-process-alist
1571 (proced-tree proced-process-alist))
1573 ;; It is useless to keep undo information if we revert, filter, or
1574 ;; refine the listing so that `proced-process-alist' has changed.
1575 ;; We could keep the undo information if we only re-sort the buffer.
1576 ;; Would that be useful? Re-re-sorting is easy, too.
1577 (if (consp buffer-undo-list)
1578 (setq buffer-undo-list nil))
1579 (let ((buffer-undo-list t)
1580 ;; If point is on a field, we try to return point to that field.
1581 ;; Otherwise we try to return to the same column
1582 (old-pos (let ((pid (proced-pid-at-point))
1583 (key (get-text-property (point) 'proced-key)))
1584 (list pid key ; can both be nil
1585 (if key
1586 (if (get-text-property (1- (point)) 'proced-key)
1587 (- (point) (previous-single-property-change
1588 (point) 'proced-key))
1589 0)
1590 (current-column)))))
1591 buffer-read-only mp-list)
1592 ;; remember marked processes (whatever the mark was)
1593 (goto-char (point-min))
1595 (push (cons (save-match-data (proced-pid-at-point))
1596 (match-string-no-properties 1)) mp-list))
1598 ;; generate listing
1599 (erase-buffer)
1600 (proced-format proced-process-alist proced-format)
1601 (goto-char (point-min))
1602 (while (not (eobp))
1603 (insert " ")
1604 (forward-line))
1605 (setq proced-header-line (concat " " proced-header-line))
1606 (if revert (set-buffer-modified-p nil))
1608 ;; set `goal-column'
1609 (let ((grammar (assq proced-goal-attribute proced-grammar-alist)))
1610 (setq goal-column ;; set to nil if no match
1611 (if (and grammar
1612 (not (zerop (buffer-size)))
1613 (string-match (regexp-quote (nth 1 grammar))
1614 proced-header-line))
1615 (if (nth 3 grammar)
1616 (match-beginning 0)
1617 (match-end 0)))))
1619 ;; Restore process marks and buffer position (if possible).
1620 ;; Sometimes this puts point in the middle of the proced buffer
1621 ;; where it is not interesting. Is there a better / more flexible solution?
1622 (goto-char (point-min))
1623 (let (pid mark new-pos)
1624 (if (or mp-list (car old-pos))
1625 (while (not (eobp))
1626 (setq pid (proced-pid-at-point))
1627 (when (setq mark (assq pid mp-list))
1628 (insert (cdr mark))
1629 (delete-char 1)
1630 (beginning-of-line))
1631 (when (eq (car old-pos) pid)
1632 (if (nth 1 old-pos)
1633 (let ((limit (line-end-position)) pos)
1634 (while (and (not new-pos)
1635 (setq pos (next-property-change (point) nil limit)))
1636 (goto-char pos)
1637 (when (eq (nth 1 old-pos)
1638 (get-text-property (point) 'proced-key))
1639 (forward-char (min (nth 2 old-pos)
1640 (- (next-property-change (point))
1641 (point))))
1642 (setq new-pos (point))))
1643 (unless new-pos
1644 ;; we found the process, but the field of point
1645 ;; is not listed anymore
1646 (setq new-pos (proced-move-to-goal-column))))
1647 (setq new-pos (min (+ (line-beginning-position) (nth 2 old-pos))
1648 (line-end-position)))))
1649 (forward-line)))
1650 (if new-pos
1651 (goto-char new-pos)
1652 (goto-char (point-min))
1653 (proced-move-to-goal-column)))
1654 ;; update modeline
1655 ;; Does the long `mode-name' clutter the modeline? It would be nice
1656 ;; to have some other location for displaying the values of the various
1657 ;; flags that affect the behavior of proced (flags one might want
1658 ;; to change on the fly). Where??
1659 (setq mode-name
1660 (concat "Proced"
1661 (if proced-filter
1662 (concat ": " (symbol-name proced-filter))
1663 "")
1664 (if proced-sort
1665 (let* ((key (if (consp proced-sort) (car proced-sort)
1666 proced-sort))
1667 (grammar (assq key proced-grammar-alist)))
1668 (concat " by " (if proced-descend "-" "+")
1669 (nth 1 grammar)))
1670 "")))
1671 (force-mode-line-update)
1672 ;; run `proced-post-display-hook' only for a displayed buffer.
1673 (if (get-buffer-window) (run-hooks 'proced-post-display-hook))
1674 ;; done
1675 (or quiet (input-pending-p)
1676 (message (if revert "Updating process information...done."
1677 "Updating process display...done.")))))
1679 (defun proced-revert (&rest args)
1680 "Reevaluate the process listing based on the currently running processes.
1681 Preserves point and marks."
1682 (proced-update t))
1684 (defun proced-send-signal (&optional signal)
1685 "Send a SIGNAL to the marked processes.
1686 If no process is marked, operate on current process.
1687 SIGNAL may be a string (HUP, INT, TERM, etc.) or a number.
1688 If SIGNAL is nil display marked processes and query interactively for SIGNAL.
1689 After sending the signal, this command runs the normal hook
1690 `proced-after-send-signal-hook'."
1691 (interactive)
1692 (let ((regexp (proced-marker-regexp))
1693 process-alist)
1694 ;; collect marked processes
1695 (save-excursion
1696 (goto-char (point-min))
1697 (while (re-search-forward regexp nil t)
1698 (push (cons (proced-pid-at-point)
1699 ;; How much info should we collect here?
1700 (buffer-substring-no-properties
1701 (+ 2 (line-beginning-position))
1702 (line-end-position)))
1703 process-alist)))
1704 (setq process-alist
1705 (if process-alist
1706 (nreverse process-alist)
1707 ;; take current process
1708 (list (cons (proced-pid-at-point)
1709 (buffer-substring-no-properties
1710 (+ 2 (line-beginning-position))
1711 (line-end-position))))))
1712 (unless signal
1713 ;; Display marked processes (code taken from `dired-mark-pop-up').
1714 (let ((bufname " *Marked Processes*") ; use leading space in buffer name
1715 ; to make this buffer ephemeral
1716 (header-line (substring-no-properties proced-header-line)))
1717 (with-current-buffer (get-buffer-create bufname)
1718 (setq truncate-lines t
1719 proced-header-line header-line ; inherit header line
1720 header-line-format '(:eval (proced-header-line)))
1721 (add-hook 'post-command-hook 'force-mode-line-update nil t)
1722 (let ((inhibit-read-only t))
1723 (erase-buffer)
1724 (buffer-disable-undo)
1725 (setq buffer-read-only t)
1726 (dolist (process process-alist)
1728 (save-window-excursion
1729 ;; Analogous to `dired-pop-to-buffer'
1730 ;; Don't split window horizontally. (Bug#1806)
1731 (let (split-width-threshold)
1732 (pop-to-buffer (current-buffer)))
1733 (fit-window-to-buffer (get-buffer-window) nil 1)
1734 (let* ((completion-ignore-case t)
1735 (pnum (if (= 1 (length process-alist))
1736 "1 process"
1737 (format "%d processes" (length process-alist))))
1738 (completion-annotate-function
1739 (lambda (s) (cdr (assoc s proced-signal-list)))))
1740 (setq signal
1741 (completing-read (concat "Send signal [" pnum
1742 "] (default TERM): ")
1743 proced-signal-list
1744 nil nil nil nil "TERM")))))))
1745 ;; send signal
1746 (let ((count 0)
1747 failures)
1748 ;; Why not always use `signal-process'? See
1749 ;; http://lists.gnu.org/archive/html/emacs-devel/2008-03/msg02955.html
1750 (if (functionp proced-signal-function)
1751 ;; use built-in `signal-process'
1752 (let ((signal (if (stringp signal)
1754 (string-to-number signal)
1755 (make-symbol signal))
1756 signal))) ; number
1757 (dolist (process process-alist)
1758 (condition-case err
1759 (if (zerop (funcall
1760 proced-signal-function (car process) signal))
1761 (setq count (1+ count))
1763 (push (cdr process) failures))
1764 (error ; catch errors from failed signals
1767 (push (cdr process) failures)))))
1768 ;; use external system call
1769 (let ((signal (concat "-" (if (numberp signal)
1770 (number-to-string signal) signal))))
1771 (dolist (process process-alist)
1772 (with-temp-buffer
1773 (condition-case err
1774 (if (zerop (call-process
1775 proced-signal-function nil t nil
1776 signal (number-to-string (car process))))
1777 (setq count (1+ count))
1778 (proced-log (current-buffer))
1780 (push (cdr process) failures))
1781 (error ; catch errors from failed signals
1782 (proced-log (current-buffer))
1784 (push (cdr process) failures)))))))
1785 (if failures
1786 ;; Proced error message are not always very precise.
1787 ;; Can we issue a useful one-line summary in the
1788 ;; message area (using FAILURES) if only one signal failed?
1789 (proced-log-summary
1790 signal
1791 (format "%d of %d signal%s failed"
1792 (length failures) (length process-alist)
1793 (if (= 1 (length process-alist)) "" "s")))
1794 (proced-success-message "Sent signal to" count)))
1795 ;; final clean-up
1796 (run-hooks 'proced-after-send-signal-hook)))
1798 ;; similar to `dired-why'
1799 (defun proced-why ()
1800 "Pop up a buffer with error log output from Proced.
1801 A group of errors from a single command ends with a formfeed.
1803 (interactive)
1804 (if (get-buffer proced-log-buffer)
1805 (save-selected-window
1806 ;; move `proced-log-buffer' to the front of the buffer list
1807 (select-window (display-buffer (get-buffer proced-log-buffer)))
1808 (setq truncate-lines t)
1809 (set-buffer-modified-p nil)
1810 (setq buffer-read-only t)
1811 (goto-char (point-max))
1812 (forward-line -1)
1813 (backward-page 1)
1814 (recenter 0))))
1816 ;; similar to `dired-log'
1817 (defun proced-log (log &rest args)
1818 "Log a message or the contents of a buffer.
1819 If LOG is a string and there are more args, it is formatted with
1821 End each bunch of errors with (proced-log t signal):
1822 this inserts the current time, buffer and signal at the start of the page,
1824 (let ((obuf (current-buffer)))
1825 (with-current-buffer (get-buffer-create proced-log-buffer)
1826 (goto-char (point-max))
1827 (let (buffer-read-only)
1828 (cond ((stringp log)
1829 (insert (if args
1830 (apply 'format log args)
1831 log)))
1832 ((bufferp log)
1833 (insert-buffer-substring log))
1834 ((eq t log)
1835 (backward-page 1)
1836 (unless (bolp)
1838 (insert (current-time-string)
1841 (goto-char (point-max))
1844 ;; similar to `dired-log-summary'
1845 (defun proced-log-summary (signal string)
1846 "State a summary of SIGNAL's failures, in echo area and log buffer.
1847 STRING is an overall summary of the failures."
1848 (message "Signal %s: %s--type ? for details" signal string)
1849 ;; Log a summary describing a bunch of errors.
1851 (proced-log t signal))
1853 (defun proced-help ()
1854 "Provide help for the Proced user."
1855 (interactive)
1856 (proced-why)
1857 (if (eq last-command 'proced-help)
1858 (describe-mode)
1859 (message proced-help-string)))
1861 (defun proced-undo ()
1862 "Undo in a Proced buffer.
1863 This doesn't recover killed processes, it just undoes changes in the Proced
1864 buffer. You can use it to recover marks."
1865 (interactive)
1866 (let (buffer-read-only)
1867 (undo))
1868 (message "Change in Proced buffer undone.
1869 Killed processes cannot be recovered by Emacs."))
1871 (defun proced-unload-function ()
1872 "Unload the Proced library."
1873 (save-current-buffer
1874 (dolist (buf (buffer-list))
1875 (set-buffer buf)
1876 (when (eq major-mode 'proced-mode)
1877 (funcall (or (default-value 'major-mode) 'fundamental-mode)))))
1878 ;; continue standard unloading
1879 nil)
1881 (provide 'proced)
1883 ;; arch-tag: a6e312ad-9032-45aa-972d-31a8cfc545af
1884 ;;; proced.el ends here