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456 lines
16 KiB
EmacsLisp
456 lines
16 KiB
EmacsLisp
;;; proced.el --- operate on processes like dired
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;; Copyright (C) 2008 Free Software Foundation, Inc.
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;; Author: Roland Winkler <Roland.Winkler@physik.uni-erlangen.de>
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;; Keywords: Processes, Unix
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 3, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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;; Boston, MA 02110-1301, USA.
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;;; Commentary:
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;; Proced makes an Emacs buffer containing a listing of the current processes
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;; (using ps(1)). You can use the normal Emacs commands to move around in
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;; this buffer, and special Proced commands to operate on the processes listed.
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;;
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;; To autoload, use
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;; (autoload 'proced "proced" nil t)
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;; in your .emacs file.
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;;
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;; Is there a need for additional features like:
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;; - automatic update of process list
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;; - sort by CPU time or other criteria
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;; - filter by user name or other criteria
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;;; Code:
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(defgroup proced nil
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"Proced mode."
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:group 'processes
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:group 'unix
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:prefix "proced-")
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(defcustom proced-procname-column-regexp "\\b\\(CMD\\|COMMAND\\)\\b"
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"If non-nil, regexp that defines the `proced-procname-column'."
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:group 'proced
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:type '(choice (const :tag "none" nil)
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(regexp :tag "regexp")))
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(defcustom proced-command-alist
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(cond ((memq system-type '(berkeley-unix netbsd))
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'(("user" ("ps" "-uxgww") 2)
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("user-running" ("ps" "-uxrgww") 2)
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("all" ("ps" "-auxgww") 2)
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("all-running" ("ps" "-auxrgww") 2)))
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((memq system-type '(linux lignux gnu/linux))
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`(("user" ("ps" "uxwww") 2)
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("user-running" ("ps" "uxrwww") 2)
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("all" ("ps" "auxwww") 2)
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("all-running" ("ps" "auxrwww") 2)
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("emacs" ("ps" "--pid" ,(number-to-string (emacs-pid))
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"--ppid" ,(number-to-string (emacs-pid))
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"uwww") 2)))
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(t ; standard syntax doesn't allow us to list running processes only
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`(("user" ("ps" "-fu" ,(number-to-string (user-uid))) 2)
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("all" ("ps" "-ef") 2))))
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"Alist of commands to get list of processes.
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Each element has the form (NAME COMMAND PID-COLUMN SORT-COLUMN).
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NAME is a shorthand name to select the type of listing.
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COMMAND is a list (COMMAND-NAME ARG1 ARG2 ...),
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where COMMAND-NAME is the command to generate the listing (usually \"ps\").
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ARG1, ARG2, ... are arguments passed to COMMAND-NAME to generate
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a particular listing. These arguments differ under various operating systems.
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PID-COLUMN is the column number (starting from 1) of the process ID.
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SORT-COLUMN is the column number used for sorting the process listing
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\(must be a numeric field). If nil, the process listing is not sorted."
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:group 'proced
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:type '(repeat (group (string :tag "name")
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(cons (string :tag "command")
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(repeat (string :tag "option")))
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(integer :tag "PID column")
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(option (integer :tag "sort column")))))
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(defcustom proced-command (if (zerop (user-real-uid)) "all" "user")
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"Name of process listing.
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Must be the car of an element of `proced-command-alist'."
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:group 'proced
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:type '(string :tag "name"))
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(defcustom proced-kill-program "kill"
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"Name of kill command (usually `kill')."
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:group 'proced
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:type '(string :tag "command"))
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(defcustom proced-signal-list
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'(("HUP (1. Hangup)")
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("INT (2. Terminal interrupt)")
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("QUIT (3. Terminal quit)")
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("ABRT (6. Process abort)")
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("KILL (9. Kill -- cannot be caught or ignored)")
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("ALRM (14. Alarm Clock)")
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("TERM (15. Termination)"))
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"List of signals, used for minibuffer completion."
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:group 'proced
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:type '(repeat (string :tag "signal")))
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(defvar proced-marker-char ?* ; the answer is 42
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"In proced, the current mark character.")
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;; face and font-lock code taken from dired
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(defgroup proced-faces nil
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"Faces used by Proced."
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:group 'proced
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:group 'faces)
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(defface proced-header
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'((t (:inherit font-lock-type-face)))
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"Face used for proced headers."
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:group 'proced-faces)
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(defvar proced-header-face 'proced-header
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"Face name used for proced headers.")
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(defface proced-mark
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'((t (:inherit font-lock-constant-face)))
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"Face used for proced marks."
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:group 'proced-faces)
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(defvar proced-mark-face 'proced-mark
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"Face name used for proced marks.")
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(defface proced-marked
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'((t (:inherit font-lock-warning-face)))
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"Face used for marked processes."
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:group 'proced-faces)
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(defvar proced-marked-face 'proced-marked
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"Face name used for marked processes.")
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(defvar proced-re-mark "^[^ \n]"
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"Regexp matching a marked line.
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Important: the match ends just after the marker.")
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(defvar proced-header-regexp "\\`.*$"
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"Regexp matching a header line.")
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(defvar proced-procname-column nil
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"Proced command column.
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Initialized based on `proced-procname-column-regexp'.")
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(defvar proced-font-lock-keywords
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(list
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;;
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;; Process listing headers.
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(list proced-header-regexp '(0 proced-header-face))
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;;
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;; Proced marks.
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(list proced-re-mark '(0 proced-mark-face))
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;;
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;; Marked files.
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(list (concat "^[" (char-to-string proced-marker-char) "]")
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'(".+" (proced-move-to-procname) nil (0 proced-marked-face)))))
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(defvar proced-mode-map
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(let ((km (make-sparse-keymap)))
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(define-key km " " 'next-line)
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(define-key km "n" 'next-line)
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(define-key km "p" 'previous-line)
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(define-key km "\C-?" 'previous-line)
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(define-key km "h" 'describe-mode)
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(define-key km "?" 'proced-help)
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(define-key km "d" 'proced-mark) ; Dired compatibility
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(define-key km "m" 'proced-mark)
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(define-key km "M" 'proced-mark-all)
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(define-key km "g" 'revert-buffer) ; Dired compatibility
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(define-key km "q" 'quit-window)
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(define-key km "u" 'proced-unmark)
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(define-key km "U" 'proced-unmark-all)
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(define-key km "x" 'proced-send-signal) ; Dired compatibility
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(define-key km "k" 'proced-send-signal) ; kill processes
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(define-key km "l" 'proced-listing-type)
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(define-key km [remap undo] 'proced-undo)
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(define-key km [remap advertised-undo] 'proced-undo)
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km)
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"Keymap for proced commands")
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(easy-menu-define
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proced-menu proced-mode-map "Proced Menu"
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'("Proced"
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["Mark" proced-mark t]
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["Unmark" proced-unmark t]
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["Mark All" proced-mark-all t]
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["Unmark All" proced-unmark-all t]
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"--"
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["Revert" revert-buffer t]
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["Send signal" proced-send-signal t]
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["Change listing" proced-listing-type t]))
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(defconst proced-help-string
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"(n)ext, (p)revious, (m)ark, (u)nmark, (k)ill, (q)uit (type ? for more help)"
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"Help string for proced.")
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(defun proced-mode (&optional arg)
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"Mode for displaying UNIX processes and sending signals to them.
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Type \\[proced-mark-process] to mark a process for later commands.
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Type \\[proced-send-signal] to send signals to marked processes.
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If invoked with optional ARG the window displaying the process
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information will be displayed but not selected.
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\\{proced-mode-map}"
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(interactive "P")
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(let ((proced-buffer (get-buffer-create "*Process Info*")) new)
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(set-buffer proced-buffer)
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(setq new (zerop (buffer-size)))
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(when new
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(kill-all-local-variables)
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(use-local-map proced-mode-map)
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(abbrev-mode 0)
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(auto-fill-mode 0)
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(setq buffer-read-only t
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truncate-lines t
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major-mode 'proced-mode
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mode-name "Proced")
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(set (make-local-variable 'revert-buffer-function) 'proced-revert)
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(set (make-local-variable 'font-lock-defaults)
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'(proced-font-lock-keywords t nil nil beginning-of-line)))
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(if (or new arg)
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(proced-update))
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(if arg
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(display-buffer proced-buffer)
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(pop-to-buffer proced-buffer)
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(message (substitute-command-keys
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"type \\[quit-window] to quit, \\[proced-help] for help")))
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(if new (run-mode-hooks 'proced-mode-hook))))
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;; Proced mode is suitable only for specially formatted data.
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(put 'proced-mode 'mode-class 'special)
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(fset 'proced 'proced-mode)
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(defun proced-move-to-procname ()
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"Move to the beginning of the process name on the current line.
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Return the position of the beginning of the process name, or nil if none found."
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(beginning-of-line)
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(if proced-procname-column
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(forward-char proced-procname-column)
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(forward-char 2)))
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(defun proced-mark (&optional count)
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"Mark the current (or next COUNT) processes."
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(interactive "p")
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(proced-do-mark t count))
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(defun proced-unmark (&optional count)
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"Unmark the current (or next COUNT) processes."
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(interactive "p")
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(proced-do-mark nil count))
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(defun proced-do-mark (mark &optional count)
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"Mark the current (or next ARG) processes using MARK."
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(or count (setq count 1))
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(let ((n (if (<= 0 count) 1 -1))
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(line (line-number-at-pos))
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buffer-read-only)
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;; do nothing in the first line
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(unless (= line 1)
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(setq count (1+ (cond ((<= 0 count) count)
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((< (abs count) line) (abs count))
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(t (1- line)))))
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(beginning-of-line)
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(while (not (or (zerop (setq count (1- count))) (eobp)))
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(proced-insert-mark mark n))
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(proced-move-to-procname))))
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(defun proced-mark-all ()
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"Mark all processes."
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(interactive)
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(proced-do-mark-all t))
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(defun proced-unmark-all ()
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"Unmark all processes."
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(interactive)
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(proced-do-mark-all nil))
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(defun proced-do-mark-all (mark)
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"Mark all processes using MARK."
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(save-excursion
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(let (buffer-read-only)
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(goto-line 2)
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(while (not (eobp))
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(proced-insert-mark mark 1)))))
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(defun proced-insert-mark (mark n)
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"If MARK is non-nil, insert `proced-marker-char', move N lines."
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;; Do we need other marks besides `proced-marker-char'?
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(insert (if mark proced-marker-char ?\s))
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(delete-char 1)
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(forward-line n))
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(defun proced-listing-type (command)
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"Select `proced' listing type COMMAND from `proced-command-alist'."
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(interactive
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(list (completing-read "Listing type: " proced-command-alist nil t)))
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(setq proced-command command)
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(proced-update))
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(defsubst proced-skip-regexp ()
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"Regexp to skip in process listing."
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(apply 'concat (make-list (1- (nth 2 (assoc proced-command
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proced-command-alist)))
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"\\s-+\\S-+")))
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(defun proced-update (&optional quiet)
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"Update the `proced' process information. Preserves point and marks."
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(interactive)
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(or quiet (message "Updating process information..."))
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(let* ((command (cdr (assoc proced-command proced-command-alist)))
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(regexp (concat (proced-skip-regexp) "\\s-+\\([0-9]+\\>\\)"))
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(old-pos (if (save-excursion
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(beginning-of-line)
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(looking-at (concat "^[* ]" regexp)))
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(cons (match-string-no-properties 1)
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(current-column))))
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buffer-read-only plist)
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(goto-char (point-min))
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;; remember marked processes (whatever the mark was)
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(while (re-search-forward (concat "^\\(\\S-\\)" regexp) nil t)
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(push (cons (match-string-no-properties 2)
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(match-string-no-properties 1)) plist))
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;; generate new listing
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(erase-buffer)
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(apply 'call-process (caar command) nil t nil (cdar command))
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(goto-char (point-min))
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(while (not (eobp))
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(insert " ")
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(forward-line))
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;; (delete-trailing-whitespace)
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(goto-char (point-min))
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(while (re-search-forward "[ \t\r]+$" nil t)
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(delete-region (match-beginning 0) (match-end 0)))
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;; set `proced-procname-column'
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(goto-char (point-min))
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(and proced-procname-column-regexp
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(re-search-forward proced-procname-column-regexp nil t)
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(setq proced-procname-column (1- (match-beginning 0))))
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;; sort fields
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(goto-line 2)
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(if (nth 2 command)
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(sort-numeric-fields (nth 2 command) (point) (point-max)))
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(set-buffer-modified-p nil)
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;; restore process marks
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(if plist
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(save-excursion
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(goto-line 2)
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(let (mark)
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(while (re-search-forward (concat "^" regexp) nil t)
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(if (setq mark (assoc (match-string-no-properties 1) plist))
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(save-excursion
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(beginning-of-line)
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(insert (cdr mark))
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(delete-char 1)))))))
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;; restore buffer position (if possible)
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(goto-line 2)
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(if (and old-pos
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(re-search-forward
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(concat "^[* ]" (proced-skip-regexp) "\\s-+" (car old-pos) "\\>")
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nil t))
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(progn
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(beginning-of-line)
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(forward-char (cdr old-pos)))
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(proced-move-to-procname))
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(or quiet (input-pending-p)
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(message "Updating process information...done."))))
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(defun proced-revert (&rest args)
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"Analog of `revert-buffer'."
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(proced-update))
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;; I do not want to reinvent the wheel
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(autoload 'dired-pop-to-buffer "dired")
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(defun proced-send-signal (&optional signal)
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"Send a SIGNAL to the marked processes.
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SIGNAL may be a string (HUP, INT, TERM, etc.) or a number.
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If SIGNAL is nil display marked processes and query interactively for SIGNAL."
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(interactive)
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(let ((regexp (concat "^\\*" (proced-skip-regexp) "\\s-+\\([0-9]+\\>\\).*$"))
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plist)
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;; collect marked processes
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(save-excursion
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(goto-char (point-min))
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(while (re-search-forward regexp nil t)
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(push (cons (match-string-no-properties 1)
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(substring (match-string-no-properties 0) 2))
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plist)))
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(if (not plist)
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(message "No processes marked")
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(unless signal
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;; Display marked processes (code taken from `dired-mark-pop-up').
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;; We include all process information to distinguish multiple
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;; instances of the same program.
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(let ((bufname " *Marked Processes*")
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(header (save-excursion
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(goto-char (+ 2 (point-min)))
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(buffer-substring-no-properties
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(point) (line-end-position)))))
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(with-current-buffer (get-buffer-create bufname)
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(setq truncate-lines t)
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(erase-buffer)
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(insert header "\n")
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(dolist (proc plist)
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(insert (cdr proc) "\n"))
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(save-window-excursion
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(dired-pop-to-buffer bufname) ; all we need
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(let* ((completion-ignore-case t)
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;; The following is an ugly hack. Is there a better way
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;; to help people like me to remember the signals and
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;; their meanings?
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(tmp (completing-read "Signal (default TERM): "
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proced-signal-list
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nil nil nil nil "TERM")))
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(setq signal (if (string-match "^\\(\\S-+\\)\\s-" tmp)
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(match-string 1 tmp) tmp))))))
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;; send signal
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(apply 'call-process proced-kill-program nil 0 nil
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(concat "-" (if (numberp signal)
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(number-to-string signal) signal))
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(mapcar 'car plist))
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(run-hooks 'proced-after-send-signal-hook)))))
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(defun proced-help ()
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"Provide help for the `proced' user."
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(interactive)
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(if (eq last-command 'proced-help)
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(describe-mode)
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(message proced-help-string)))
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(defun proced-undo ()
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"Undo in a proced buffer.
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This doesn't recover killed processes, it just undoes changes in the proced
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buffer. You can use it to recover marks."
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(interactive)
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(let (buffer-read-only)
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(undo))
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(message "Change in proced buffer undone.
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Killed processes cannot be recovered by Emacs."))
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(provide 'proced)
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;; arch-tag: a6e312ad-9032-45aa-972d-31a8cfc545af
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;;; proced.el ends here.
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