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-;; Run asynchronous VMS subprocesses under Emacs
-;; Copyright (C) 1986 Free Software Foundation, Inc.
-
-;; This file is part of GNU Emacs.
-
-;; GNU Emacs 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 1, or (at your option)
-;; any later version.
-
-;; GNU Emacs 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 GNU Emacs; see the file COPYING. If not, write to
-;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
-
-;; Written by Mukesh Prasad.
-
-(defvar display-subprocess-window nil
- "If non-nil, the suprocess window is displayed whenever input is received.")
-
-(defvar command-prefix-string "$ "
- "String to insert to distinguish commands entered by user.")
-
-(defvar subprocess-running nil)
-(defvar command-mode-map nil)
-
-(if command-mode-map
- nil
- (setq command-mode-map (make-sparse-keymap))
- (define-key command-mode-map "\C-m" 'command-send-input)
- (define-key command-mode-map "\C-u" 'command-kill-line))
-
-(defun subprocess-input (name str)
- "Handles input from a subprocess. Called by Emacs."
- (if display-subprocess-window
- (display-buffer subprocess-buf))
- (let ((old-buffer (current-buffer)))
- (set-buffer subprocess-buf)
- (goto-char (point-max))
- (insert str)
- (insert ?\n)
- (set-buffer old-buffer)))
-
-(defun subprocess-exit (name)
- "Called by Emacs upon subprocess exit."
- (setq subprocess-running nil))
-
-(defun start-subprocess ()
- "Spawns an asynchronous subprocess with output redirected to
-the buffer *COMMAND*. Within this buffer, use C-m to send
-the last line to the subprocess or to bring another line to
-the end."
- (if subprocess-running
- (return t))
- (setq subprocess-buf (get-buffer-create "*COMMAND*"))
- (save-excursion
- (set-buffer subprocess-buf)
- (use-local-map command-mode-map))
- (setq subprocess-running (spawn-subprocess 1 'subprocess-input
- 'subprocess-exit))
- ;; Initialize subprocess so it doesn't panic and die upon
- ;; encountering the first error.
- (and subprocess-running
- (send-command-to-subprocess 1 "ON SEVERE_ERROR THEN CONTINUE")))
-
-(defvar subprocess-command-to-buffer-tmpdir "SYS$SCRATCH:"
- "*Put temporary files from subprocess-command-to-buffer here.")
-
-(defun subprocess-command-to-buffer (command buffer)
- "Execute command and redirect output into buffer.
-
-BUGS: only the output up to the end of the first image activation is trapped."
- (if (not subprocess-running)
- (start-subprocess))
- (save-excursion
- (set-buffer buffer)
- (let ((output-filename
- (concat subprocess-command-to-buffer-tmpdir
- "OUTPUT-FOR-" (getenv "USER") ".LISTING")))
- (while (file-attributes output-filename)
- (delete-file output-filename))
- (send-command-to-subprocess 1 (concat "DEFINE/USER SYS$OUTPUT "
- output-filename "-NEW"))
- (send-command-to-subprocess 1 command)
- (send-command-to-subprocess 1 (concat "RENAME " output-filename
- "-NEW " output-filename))
- (while (not (file-attributes output-filename))
- (sleep-for 2))
- (insert-file output-filename))))
-
-(defun subprocess-command ()
- "Starts asynchronous subprocess if not running and switches to its window."
- (interactive)
- (if (not subprocess-running)
- (start-subprocess))
- (and subprocess-running
- (progn (pop-to-buffer subprocess-buf) (goto-char (point-max)))))
-
-(defun command-send-input ()
- "If at last line of buffer, sends the current line to
-the spawned subprocess. Otherwise brings back current
-line to the last line for resubmission."
- (interactive)
- (beginning-of-line)
- (let ((current-line (buffer-substring (point)
- (progn (end-of-line) (point)))))
- (if (eobp)
- (progn
- (if (not subprocess-running)
- (start-subprocess))
- (if subprocess-running
- (progn
- (beginning-of-line)
- (send-command-to-subprocess 1 current-line)
- (if command-prefix-string
- (progn (beginning-of-line) (insert command-prefix-string)))
- (next-line 1))))
- ;; else -- if not at last line in buffer
- (end-of-buffer)
- (backward-char)
- (next-line 1)
- (if (string-equal command-prefix-string
- (substring current-line 0 (length command-prefix-string)))
- (insert (substring current-line (length command-prefix-string)))
- (insert current-line)))))
-
-(defun command-kill-line()
- "Kills the current line. Used in command mode."
- (interactive)
- (beginning-of-line)
- (kill-line))
-
-(define-key esc-map "$" 'subprocess-command)