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- ;;; background.el --- fun with background jobs
-
- ;; Copyright (C) 1988 Joe Keane <jk3k+@andrew.cmu.edu>
- ;; Keywords: processes
-
- ;; This file is part of XEmacs.
-
- ;; XEmacs 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 2 of the License, or
- ;; (at your option) any later version.
-
- ;; XEmacs 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 XEmacs; if not, write to the Free Software
- ;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- ;; 02111-1307, USA.
-
- ;;; Synched up with: Not in FSF
-
- ;;; Commentary:
-
- ;; - Adapted to use comint and cleaned up somewhat. Olin Shivers 5/90
- ;; - Background failed to set the process buffer's working directory
- ;; in some cases. Fixed. Olin 6/14/90
- ;; - Background failed to strip leading cd's off the command string
- ;; after performing them. This screwed up relative pathnames.
- ;; Furthermore, the proc buffer's default dir wasn't initialised
- ;; to the user's buffer's default dir before doing the leading cd.
- ;; This also screwed up relative pathnames if the proc buffer already
- ;; existed and was set to a different default dir. Hopefully we've
- ;; finally got it right. The pwd is now reported in the buffer
- ;; just to let the user know. Bug reported by Piet Van Oostrum.
- ;; Olin 10/19/90
- ;; - Fixed up the sentinel to protect match-data around invocations.
- ;; Also slightly rearranged the cd match code for similar reasons.
- ;; Olin 7/16/91
- ;; - Dec 29 1995: changed for new stuff (shell-command-switch, second
- ;; arg to shell-command --> BUFFER-NAME arg to background) from
- ;; FSF 19.30. Ben Wing
-
- ;;; Code:
-
- (provide 'background)
- (require 'comint)
-
- (defgroup background nil
- "Fun with background jobs"
- :group 'processes)
-
-
- ;; user variables
- (defcustom background-show t
- "*If non-nil, background jobs' buffers are shown when they're started."
- :type 'boolean
- :group 'background)
- (defcustom background-select nil
- "*If non-nil, background jobs' buffers are selected when they're started."
- :type 'boolean
- :group 'background)
-
- ;;;###autoload
- (defun background (command &optional buffer-name)
- "Run COMMAND in the background like csh.
- A message is displayed when the job starts and finishes. The buffer is in
- comint mode, so you can send input and signals to the job. The process object
- is returned if anyone cares. See also comint-mode and the variables
- background-show and background-select.
-
- Optional second argument BUFFER-NAME is a buffer to insert the output into.
- If omitted, a buffer name is constructed from the command run."
- (interactive "s%% ")
- (let ((job-number 1)
- job-name
- (dir default-directory))
- (while (get-process (setq job-name (format "background-%d" job-number)))
- (setq job-number (1+ job-number)))
- (or buffer-name
- (setq buffer-name (format "*%s*" job-name)))
- (if background-select (pop-to-buffer buffer-name)
- (if background-show (with-output-to-temp-buffer buffer-name)) ; cute
- (set-buffer (get-buffer-create buffer-name)))
- (erase-buffer)
-
- (setq default-directory dir) ; Do this first, in case cd is relative path.
- (if (string-match "^cd[\t ]+\\([^\t ;]+\\)[\t ]*;[\t ]*" command)
- (let ((dir (substring command (match-beginning 1) (match-end 1))))
- (setq command (substring command (match-end 0)))
- (setq default-directory
- (file-name-as-directory (expand-file-name dir)))))
-
- (insert "--- working directory: " default-directory
- "\n% " command ?\n)
-
- (let ((proc (get-buffer-process
- (comint-exec buffer-name job-name shell-file-name
- nil (list shell-command-switch command)))))
- (comint-mode)
- ;; COND because the proc may have died before the G-B-P is called.
- (cond (proc (set-process-sentinel proc 'background-sentinel)
- (message "[%d] %d" job-number (process-id proc))))
- (setq mode-name "Background")
- proc)))
-
-
- (defun background-sentinel (process msg)
- "Called when a background job changes state."
- (let ((ms (match-data))) ; barf
- (unwind-protect
- (let ((msg (cond ((string= msg "finished\n") "Done")
- ((string-match "^exited" msg)
- (concat "Exit " (substring msg 28 -1)))
- ((zerop (length msg)) "Continuing")
- (t (concat (upcase (substring msg 0 1))
- (substring msg 1 -1))))))
- (message "[%s] %s %s" (process-name process)
- msg
- (nth 2 (process-command process)))
- (if (null (buffer-name (process-buffer process)))
- (set-process-buffer process nil) ; WHY? Olin.
- (if (memq (process-status process) '(signal exit))
- (save-excursion
- (set-buffer (process-buffer process))
- (let ((at-end (eobp)))
- (save-excursion
- (goto-char (point-max))
- (insert ?\n msg ?
- (substring (current-time-string) 11 19) ?\n))
- (if at-end (goto-char (point-max))))
- (set-buffer-modified-p nil)))))
- (store-match-data ms))))
-
- ;;; background.el ends here
-