473 lines
17 KiB
EmacsLisp
473 lines
17 KiB
EmacsLisp
;;; helm-sys.el --- System related functions for helm. -*- lexical-binding: t -*-
|
||
|
||
;; Copyright (C) 2012 ~ 2021 Thierry Volpiatto
|
||
|
||
;; This program is free software; you can redistribute it and/or modify
|
||
;; it under the terms of the GNU General Public License as published by
|
||
;; the Free Software Foundation, either version 3 of the License, or
|
||
;; (at your option) any later version.
|
||
|
||
;; This program is distributed in the hope that it will be useful,
|
||
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
;; GNU General Public License for more details.
|
||
|
||
;; You should have received a copy of the GNU General Public License
|
||
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||
|
||
;;; Code:
|
||
|
||
(require 'cl-lib)
|
||
(require 'helm)
|
||
(require 'helm-help)
|
||
(require 'helm-utils)
|
||
|
||
|
||
(defgroup helm-sys nil
|
||
"System related helm library."
|
||
:group 'helm)
|
||
|
||
(defface helm-top-columns
|
||
`((t ,@(and (>= emacs-major-version 27) '(:extend t))
|
||
:inherit helm-header))
|
||
"Face for helm help string in minibuffer."
|
||
:group 'helm-sys)
|
||
|
||
|
||
(defcustom helm-top-command
|
||
(cl-case system-type
|
||
(darwin "env COLUMNS=%s ps -axo pid,user,pri,nice,ucomm,tty,start_time,vsz,%%cpu,%%mem,etime,command")
|
||
(t "env COLUMNS=%s top -b -n 1"))
|
||
"Top command used to display output of top.
|
||
A format string where %s will be replaced with `frame-width'.
|
||
|
||
To use 'top' command, a version supporting batch mode (-b option)
|
||
is needed. On Mac OSX 'top' command doesn't support this, so the
|
||
'ps' command is used instead by default.
|
||
|
||
Normally 'top' command output have 12 columns, but in some
|
||
versions you may have less than this, so you can either customize
|
||
'top' to use 12 columns with the interactives 'f' and 'W' commands
|
||
of 'top', or modify `helm-top-sort-columns-alist' to fit with the
|
||
number of columns your 'top' command is using.
|
||
|
||
If you modify 'ps' command be sure that 'pid' comes in first and
|
||
\"env COLUMNS=%s\" is specified at beginning of command. Ensure
|
||
also that no elements contain spaces (e.g., use start_time and
|
||
not start). Same as for 'top': you can customize
|
||
`helm-top-sort-columns-alist' to make sort commands working
|
||
properly according to your settings."
|
||
:group 'helm-sys
|
||
:type 'string)
|
||
|
||
(defcustom helm-top-sort-columns-alist '((com . 11)
|
||
(mem . 9)
|
||
(cpu . 8)
|
||
(user . 1))
|
||
"Allow defining which column to use when sorting output of top/ps command.
|
||
Only com, mem, cpu and user are sorted, so no need to put something
|
||
else there,it will have no effect.
|
||
Note that column numbers are counted from zero, i.e. column 1 is the
|
||
nth 0 column."
|
||
:group 'helm-sys
|
||
:type '(alist :key-type symbol :value-type (integer :tag "Column number")))
|
||
|
||
(defcustom helm-top-poll-delay 1.5
|
||
"Helm top poll after this delay when `helm-top-poll-mode' is enabled.
|
||
The minimal delay allowed is 1.5, if less than this helm-top will use 1.5."
|
||
:group 'helm-sys
|
||
:type 'float)
|
||
|
||
(defcustom helm-top-poll-delay-post-command 1.0
|
||
"Helm top stop polling during this delay.
|
||
This delay is added to `helm-top-poll-delay' after Emacs stops
|
||
being idle."
|
||
:group 'helm-sys
|
||
:type 'float)
|
||
|
||
(defcustom helm-top-poll-preselection 'linum
|
||
"Stay on same line or follow candidate when `helm-top-poll' updates display.
|
||
Possible values are \\='candidate or \\='linum.
|
||
This affects also sorting functions in the same way."
|
||
:group'helm-sys
|
||
:type '(radio :tag "Preferred preselection action for helm-top"
|
||
(const :tag "Follow candidate" candidate)
|
||
(const :tag "Stay on same line" linum)))
|
||
|
||
;;; Top (process)
|
||
;;
|
||
;;
|
||
(defvar helm-top-sort-fn nil)
|
||
(defvar helm-top-map
|
||
(let ((map (make-sparse-keymap)))
|
||
(set-keymap-parent map helm-map)
|
||
(define-key map (kbd "M-P") 'helm-top-run-sort-by-cpu)
|
||
(define-key map (kbd "M-C") 'helm-top-run-sort-by-com)
|
||
(define-key map (kbd "M-M") 'helm-top-run-sort-by-mem)
|
||
(define-key map (kbd "M-U") 'helm-top-run-sort-by-user)
|
||
map))
|
||
|
||
(defvar helm-top-after-init-hook nil
|
||
"Local hook for helm-top.")
|
||
|
||
(defvar helm-top--poll-timer nil)
|
||
|
||
(defun helm-top-poll (&optional no-update delay)
|
||
(when helm-top--poll-timer
|
||
(cancel-timer helm-top--poll-timer))
|
||
(condition-case nil
|
||
(progn
|
||
(when (and (helm--alive-p) (null no-update))
|
||
;; Fix quitting while process is running
|
||
;; by binding `with-local-quit' in init function
|
||
;; Bug#1521.
|
||
(helm-force-update
|
||
(cl-ecase helm-top-poll-preselection
|
||
(candidate (replace-regexp-in-string
|
||
"[0-9]+" "[0-9]+"
|
||
(regexp-quote (helm-get-selection nil t))))
|
||
(linum `(lambda ()
|
||
(goto-char (point-min))
|
||
(forward-line ,(helm-candidate-number-at-point)))))))
|
||
(setq helm-top--poll-timer
|
||
(run-with-idle-timer
|
||
(helm-aif (current-idle-time)
|
||
(time-add it (seconds-to-time
|
||
(or delay (helm-top--poll-delay))))
|
||
(or delay (helm-top--poll-delay)))
|
||
nil
|
||
'helm-top-poll)))
|
||
(quit (cancel-timer helm-top--poll-timer))))
|
||
|
||
(defun helm-top--poll-delay ()
|
||
(max 1.5 helm-top-poll-delay))
|
||
|
||
(defun helm-top-poll-no-update ()
|
||
(helm-top-poll t (+ (helm-top--poll-delay)
|
||
helm-top-poll-delay-post-command)))
|
||
|
||
(defun helm-top-initialize-poll-hooks ()
|
||
;; When Emacs is idle during say 20s
|
||
;; the idle timer will run in 20+1.5 s.
|
||
;; This is fine when Emacs stays idle, because the next timer
|
||
;; will run at 21.5+1.5 etc... so the display will be updated
|
||
;; at every 1.5 seconds.
|
||
;; But as soon as emacs looses its idleness, the next update
|
||
;; will occur at say 21+1.5 s, so we have to reinitialize
|
||
;; the timer at 0+1.5.
|
||
(add-hook 'post-command-hook 'helm-top-poll-no-update)
|
||
(add-hook 'focus-in-hook 'helm-top-poll-no-update))
|
||
|
||
;;;###autoload
|
||
(define-minor-mode helm-top-poll-mode
|
||
"Refresh automatically helm top buffer once enabled."
|
||
:group 'helm-top
|
||
:global t
|
||
(if helm-top-poll-mode
|
||
(progn
|
||
(add-hook 'helm-top-after-init-hook 'helm-top-poll-no-update)
|
||
(add-hook 'helm-top-after-init-hook 'helm-top-initialize-poll-hooks))
|
||
(remove-hook 'helm-top-after-init-hook 'helm-top-poll-no-update)
|
||
(remove-hook 'helm-top-after-init-hook 'helm-top-initialize-poll-hooks)))
|
||
|
||
(defvar helm-source-top
|
||
(helm-build-in-buffer-source "Top"
|
||
:header-name (lambda (name)
|
||
(concat name (if helm-top-poll-mode
|
||
" (auto updating)"
|
||
" (Press C-c C-u to refresh)")))
|
||
:init #'helm-top-init
|
||
:after-init-hook 'helm-top-after-init-hook
|
||
:cleanup (lambda ()
|
||
(when helm-top--poll-timer
|
||
(cancel-timer helm-top--poll-timer))
|
||
(remove-hook 'post-command-hook 'helm-top-poll-no-update)
|
||
(remove-hook 'focus-in-hook 'helm-top-poll-no-update))
|
||
:display-to-real #'helm-top-display-to-real
|
||
:persistent-action '(helm-top-sh-persistent-action . never-split)
|
||
:persistent-help "SIGTERM"
|
||
:help-message 'helm-top-help-message
|
||
:mode-line 'helm-top-mode-line
|
||
:follow 'never
|
||
:keymap helm-top-map
|
||
:filtered-candidate-transformer #'helm-top-sort-transformer
|
||
:action-transformer #'helm-top-action-transformer
|
||
:group 'helm-sys))
|
||
|
||
(defvar helm-top--line nil)
|
||
(defun helm-top-transformer (candidates _source)
|
||
"Transformer for `helm-top'.
|
||
Return empty string for non--valid candidates."
|
||
(cl-loop for disp in candidates collect
|
||
(cond ((string-match "^ *[0-9]+" disp) disp)
|
||
((string-match "^ *PID" disp)
|
||
(setq helm-top--line (cons (propertize disp 'face 'helm-top-columns) "")))
|
||
(t (cons disp "")))
|
||
into lst
|
||
finally return (or (member helm-top--line lst)
|
||
(cons helm-top--line lst))))
|
||
|
||
(defun helm-top--skip-top-line ()
|
||
(let* ((src (helm-get-current-source))
|
||
(src-name (assoc-default 'name src)))
|
||
(helm-aif (and (stringp src-name)
|
||
(string= src-name "Top")
|
||
(helm-get-selection nil t src))
|
||
(when (string-match-p "^ *PID" it)
|
||
(helm-next-line)))))
|
||
|
||
(defun helm-top-action-transformer (actions _candidate)
|
||
"Action transformer for `top'.
|
||
Show actions only on line starting by a PID."
|
||
(let ((disp (helm-get-selection nil t)))
|
||
(cond ((string-match "\\` *[0-9]+" disp)
|
||
(list '("kill (SIGTERM)" . (lambda (_pid)
|
||
(helm-top-sh "TERM" (helm-top--marked-pids))))
|
||
'("kill (SIGKILL)" . (lambda (_pid)
|
||
(helm-top-sh "KILL" (helm-top--marked-pids))))
|
||
'("kill (SIGINT)" . (lambda (_pid)
|
||
(helm-top-sh "INT" (helm-top--marked-pids))))
|
||
'("kill (Choose signal)"
|
||
. (lambda (_pid)
|
||
(let ((pids (helm-top--marked-pids)))
|
||
(helm-top-sh
|
||
(helm-comp-read (format "Kill %d pids with signal: "
|
||
(length pids))
|
||
'("ALRM" "HUP" "INT" "KILL" "PIPE" "POLL"
|
||
"PROF" "TERM" "USR1" "USR2" "VTALRM"
|
||
"STKFLT" "PWR" "WINCH" "CHLD" "URG"
|
||
"TSTP" "TTIN" "TTOU" "STOP" "CONT"
|
||
"ABRT" "FPE" "ILL" "QUIT" "SEGV"
|
||
"TRAP" "SYS" "EMT" "BUS" "XCPU" "XFSZ")
|
||
:must-match t)
|
||
pids))))))
|
||
(t actions))))
|
||
|
||
(defun helm-top--marked-pids ()
|
||
(helm-remove-if-not-match "\\`[0-9]+\\'" (helm-marked-candidates)))
|
||
|
||
(defun helm-top-sh (sig pids)
|
||
"Run kill shell command with signal SIG on PIDS for `helm-top'."
|
||
(message "kill -%s %s exited with status %s"
|
||
sig (mapconcat 'identity pids " ")
|
||
(apply #'call-process
|
||
"kill" nil nil nil (format "-%s" sig) pids)))
|
||
|
||
(defun helm-top-sh-persistent-action (pid)
|
||
(helm-top-sh "TERM" (list pid))
|
||
(helm-delete-current-selection))
|
||
|
||
(defun helm-top-init ()
|
||
"Insert output of top command in candidate buffer."
|
||
(with-local-quit
|
||
(unless helm-top-sort-fn (helm-top-set-mode-line "CPU"))
|
||
(with-current-buffer (helm-candidate-buffer 'global)
|
||
(call-process-shell-command
|
||
(format helm-top-command (frame-width))
|
||
nil (current-buffer)))))
|
||
|
||
(defun helm-top-display-to-real (line)
|
||
"Return pid only from LINE."
|
||
(car (split-string line)))
|
||
|
||
;; Sort top command
|
||
|
||
(defun helm-top-set-mode-line (str)
|
||
(if (string-match "Sort:\\[\\(.*\\)\\] " helm-top-mode-line)
|
||
(setq helm-top-mode-line (replace-match str nil nil helm-top-mode-line 1))
|
||
(setq helm-top-mode-line (concat (format "Sort:[%s] " str) helm-top-mode-line))))
|
||
|
||
(defun helm-top-sort-transformer (candidates source)
|
||
(helm-top-transformer
|
||
(if helm-top-sort-fn
|
||
(cl-loop for c in candidates
|
||
if (string-match "^ *[0-9]+" c)
|
||
collect c into pid-cands
|
||
else collect c into header-cands
|
||
finally return (append
|
||
header-cands
|
||
(sort pid-cands helm-top-sort-fn)))
|
||
candidates)
|
||
source))
|
||
|
||
(defun helm-top-sort-by-com (s1 s2)
|
||
(let* ((split-1 (split-string s1))
|
||
(split-2 (split-string s2))
|
||
(col (cdr (assq 'com helm-top-sort-columns-alist)))
|
||
(com-1 (nth col split-1))
|
||
(com-2 (nth col split-2)))
|
||
(string< com-1 com-2)))
|
||
|
||
(defun helm-top-sort-by-mem (s1 s2)
|
||
(let* ((split-1 (split-string s1))
|
||
(split-2 (split-string s2))
|
||
(col (cdr (assq 'mem helm-top-sort-columns-alist)))
|
||
(mem-1 (string-to-number (nth col split-1)))
|
||
(mem-2 (string-to-number (nth col split-2))))
|
||
(> mem-1 mem-2)))
|
||
|
||
(defun helm-top-sort-by-cpu (s1 s2)
|
||
(let* ((split-1 (split-string s1))
|
||
(split-2 (split-string s2))
|
||
(col (cdr (assq 'cpu helm-top-sort-columns-alist)))
|
||
(cpu-1 (string-to-number (nth col split-1)))
|
||
(cpu-2 (string-to-number (nth col split-2))))
|
||
(> cpu-1 cpu-2)))
|
||
|
||
(defun helm-top-sort-by-user (s1 s2)
|
||
(let* ((split-1 (split-string s1))
|
||
(split-2 (split-string s2))
|
||
(col (cdr (assq 'user helm-top-sort-columns-alist)))
|
||
(user-1 (nth col split-1))
|
||
(user-2 (nth col split-2)))
|
||
(string< user-1 user-2)))
|
||
|
||
(defun helm-top--preselect-fn ()
|
||
(if (eq helm-top-poll-preselection 'linum)
|
||
`(lambda ()
|
||
(goto-char (point-min))
|
||
(forward-line ,(helm-candidate-number-at-point)))
|
||
(replace-regexp-in-string
|
||
"[0-9]+" "[0-9]+"
|
||
(regexp-quote (helm-get-selection nil t)))))
|
||
|
||
(defun helm-top-run-sort-by-com ()
|
||
(interactive)
|
||
(helm-top-set-mode-line "COM")
|
||
(setq helm-top-sort-fn 'helm-top-sort-by-com)
|
||
(helm-update (helm-top--preselect-fn)))
|
||
|
||
(defun helm-top-run-sort-by-cpu ()
|
||
(interactive)
|
||
(helm-top-set-mode-line "CPU")
|
||
;; Force sorting by CPU even if some versions of top are using by
|
||
;; default CPU sorting (Bug#1908).
|
||
(setq helm-top-sort-fn 'helm-top-sort-by-cpu)
|
||
(helm-update (helm-top--preselect-fn)))
|
||
|
||
(defun helm-top-run-sort-by-mem ()
|
||
(interactive)
|
||
(helm-top-set-mode-line "MEM")
|
||
(setq helm-top-sort-fn 'helm-top-sort-by-mem)
|
||
(helm-update (helm-top--preselect-fn)))
|
||
|
||
(defun helm-top-run-sort-by-user ()
|
||
(interactive)
|
||
(helm-top-set-mode-line "USER")
|
||
(setq helm-top-sort-fn 'helm-top-sort-by-user)
|
||
(helm-update (helm-top--preselect-fn)))
|
||
|
||
|
||
;;; X RandR resolution change
|
||
;;
|
||
;;
|
||
;;; FIXME I do not care multi-display.
|
||
|
||
(defun helm-xrandr-info ()
|
||
"Return a pair with current X screen number and current X display name."
|
||
(with-temp-buffer
|
||
(call-process "xrandr" nil (current-buffer) nil
|
||
"--current")
|
||
(let (screen output)
|
||
(goto-char (point-min))
|
||
(save-excursion
|
||
(when (re-search-forward "\\(^Screen \\)\\([0-9]\\):" nil t)
|
||
(setq screen (match-string 2))))
|
||
(when (re-search-forward "^\\(.*\\) connected" nil t)
|
||
(setq output (match-string 1)))
|
||
(list screen output))))
|
||
|
||
(defun helm-xrandr-screen ()
|
||
"Return current X screen number."
|
||
(car (helm-xrandr-info)))
|
||
|
||
(defun helm-xrandr-output ()
|
||
"Return current X display name."
|
||
(cadr (helm-xrandr-info)))
|
||
|
||
(defvar helm-source-xrandr-change-resolution
|
||
(helm-build-sync-source "Change Resolution"
|
||
:candidates
|
||
(lambda ()
|
||
(with-temp-buffer
|
||
(call-process "xrandr" nil (current-buffer) nil
|
||
"--screen" (helm-xrandr-screen) "-q")
|
||
(goto-char 1)
|
||
(cl-loop while (re-search-forward " \\([0-9]+x[0-9]+\\)" nil t)
|
||
for mode = (match-string 1)
|
||
unless (member mode modes)
|
||
collect mode into modes
|
||
finally return modes)))
|
||
:action
|
||
(helm-make-actions "Change Resolution"
|
||
(lambda (mode)
|
||
(call-process "xrandr" nil nil nil
|
||
"--screen" (helm-xrandr-screen)
|
||
"--output" (helm-xrandr-output)
|
||
"--mode" mode)))))
|
||
|
||
|
||
;;; Emacs process
|
||
;;
|
||
;;
|
||
(defvar helm-source-emacs-process
|
||
(helm-build-sync-source "Emacs Process"
|
||
:init (lambda ()
|
||
(let (tabulated-list-use-header-line)
|
||
(list-processes--refresh)))
|
||
:candidates (lambda () (mapcar #'process-name (process-list)))
|
||
:candidate-transformer
|
||
(lambda (candidates)
|
||
(cl-loop for c in candidates
|
||
for command = (mapconcat
|
||
'identity
|
||
(process-command (get-process c)) " ")
|
||
if (and command (not (string= command ""))) collect
|
||
(cons (concat c " --> "
|
||
(mapconcat 'identity
|
||
(process-command (get-process c)) " "))
|
||
c)
|
||
else collect c))
|
||
:multiline t
|
||
:persistent-action (lambda (elm)
|
||
(delete-process (get-process elm))
|
||
(helm-delete-current-selection))
|
||
:persistent-help "Kill Process"
|
||
:action (helm-make-actions "Kill Process"
|
||
(lambda (_elm)
|
||
(cl-loop for p in (helm-marked-candidates)
|
||
do (delete-process (get-process p)))))))
|
||
|
||
|
||
;;;###autoload
|
||
(defun helm-top ()
|
||
"Preconfigured `helm' for top command."
|
||
(interactive)
|
||
(add-hook 'helm-after-update-hook 'helm-top--skip-top-line)
|
||
(unwind-protect
|
||
(helm :sources 'helm-source-top
|
||
:buffer "*helm top*" :full-frame t
|
||
:candidate-number-limit 9999
|
||
:preselect "^\\s-*[0-9]+"
|
||
:truncate-lines helm-show-action-window-other-window)
|
||
(remove-hook 'helm-after-update-hook 'helm-top--skip-top-line)))
|
||
|
||
;;;###autoload
|
||
(defun helm-list-emacs-process ()
|
||
"Preconfigured `helm' for Emacs process."
|
||
(interactive)
|
||
(helm :sources 'helm-source-emacs-process
|
||
:truncate-lines t
|
||
:buffer "*helm process*"))
|
||
|
||
;;;###autoload
|
||
(defun helm-xrandr-set ()
|
||
"Preconfigured helm for xrandr."
|
||
(interactive)
|
||
(helm :sources 'helm-source-xrandr-change-resolution
|
||
:buffer "*helm xrandr*"))
|
||
|
||
(provide 'helm-sys)
|
||
|
||
;;; helm-sys.el ends here
|