mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-12-05 08:53:45 +00:00
145 lines
4.9 KiB
EmacsLisp
145 lines
4.9 KiB
EmacsLisp
;;; vmsx.el --- run asynchronous VMS subprocesses under Emacs
|
|
|
|
;; Copyright (C) 1986 Free Software Foundation, Inc.
|
|
|
|
;; Author: Mukesh Prasad
|
|
;; Maintainer: FSF
|
|
;; Keywords: vms
|
|
|
|
;; 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 2, 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.
|
|
|
|
;;; Code:
|
|
|
|
(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)
|
|
|
|
;;; vmsx.el ends here
|