--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lisp/comint/background.el	Mon Aug 13 08:45:50 2007 +0200
@@ -0,0 +1,118 @@
+;;; 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+;; - 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
+
+(provide 'background)
+(require 'comint)
+
+;; user variables
+(defvar background-show t
+  "*If non-nil, background jobs' buffers are shown when they're started.")
+(defvar background-select nil
+  "*If non-nil, background jobs' buffers are selected when they're started.")
+
+(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))))