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1 | ;;; vmsproc.el --- run asynchronous VMS subprocesses under Emacs |
2 | ||
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3 | ;; Copyright (C) 1986, 2002, 2003, 2004, 2005, |
4 | ;; 2006 Free Software Foundation, Inc. | |
58142744 | 5 | |
e5167999 ER |
6 | ;; Author: Mukesh Prasad |
7 | ;; Maintainer: FSF | |
6251ee24 | 8 | ;; Keywords: vms |
76d7458e | 9 | |
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10 | ;; This file is part of GNU Emacs. |
11 | ||
12 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
13 | ;; it under the terms of the GNU General Public License as published by | |
e5167999 | 14 | ;; the Free Software Foundation; either version 2, or (at your option) |
0d20f9a0 JB |
15 | ;; any later version. |
16 | ||
17 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
18 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | ;; GNU General Public License for more details. | |
21 | ||
22 | ;; You should have received a copy of the GNU General Public License | |
b578f267 | 23 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
086add15 LK |
24 | ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
25 | ;; Boston, MA 02110-1301, USA. | |
0d20f9a0 | 26 | |
55535639 PJ |
27 | ;;; Commentary: |
28 | ||
e5167999 | 29 | ;;; Code: |
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30 | |
31 | (defvar display-subprocess-window nil | |
40198478 | 32 | "If non-nil, the subprocess window is displayed whenever input is received.") |
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33 | |
34 | (defvar command-prefix-string "$ " | |
35 | "String to insert to distinguish commands entered by user.") | |
36 | ||
37 | (defvar subprocess-running nil) | |
6bc52202 SM |
38 | (defvar subprocess-buf nil) |
39 | ||
ceee4f5d SM |
40 | (defvar command-mode-map |
41 | (let ((map (make-sparse-keymap))) | |
42 | (define-key map "\C-m" 'command-send-input) | |
43 | (define-key map "\C-u" 'command-kill-line) | |
44 | map)) | |
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45 | |
46 | (defun subprocess-input (name str) | |
47 | "Handles input from a subprocess. Called by Emacs." | |
48 | (if display-subprocess-window | |
49 | (display-buffer subprocess-buf)) | |
6bc52202 | 50 | (with-current-buffer subprocess-buf |
0d20f9a0 | 51 | (goto-char (point-max)) |
6bc52202 | 52 | (insert str ?\n))) |
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53 | |
54 | (defun subprocess-exit (name) | |
55 | "Called by Emacs upon subprocess exit." | |
56 | (setq subprocess-running nil)) | |
57 | ||
58 | (defun start-subprocess () | |
59 | "Spawns an asynchronous subprocess with output redirected to | |
60 | the buffer *COMMAND*. Within this buffer, use C-m to send | |
61 | the last line to the subprocess or to bring another line to | |
62 | the end." | |
63 | (if subprocess-running | |
64 | (return t)) | |
65 | (setq subprocess-buf (get-buffer-create "*COMMAND*")) | |
ceee4f5d | 66 | (with-current-buffer subprocess-buf |
0d20f9a0 JB |
67 | (use-local-map command-mode-map)) |
68 | (setq subprocess-running (spawn-subprocess 1 'subprocess-input | |
69 | 'subprocess-exit)) | |
70 | ;; Initialize subprocess so it doesn't panic and die upon | |
71 | ;; encountering the first error. | |
72 | (and subprocess-running | |
73 | (send-command-to-subprocess 1 "ON SEVERE_ERROR THEN CONTINUE"))) | |
74 | ||
75 | (defun subprocess-command-to-buffer (command buffer) | |
76 | "Execute COMMAND and redirect output into BUFFER." | |
77 | (let (cmd args) | |
78 | (setq cmd (substring command 0 (string-match " " command))) | |
79 | (setq args (substring command (string-match " " command))) | |
80 | (call-process cmd nil buffer nil "*dcl*" args))) | |
ceee4f5d SM |
81 | ;; BUGS: only the output up to the end of the first image activation is trapped. |
82 | ;; (if (not subprocess-running) | |
83 | ;; (start-subprocess)) | |
84 | ;; (with-current-buffer buffer | |
85 | ;; (let ((output-filename (concat "SYS$SCRATCH:OUTPUT-FOR-" | |
86 | ;; (getenv "USER") ".LISTING"))) | |
87 | ;; (while (file-exists-p output-filename) | |
88 | ;; (delete-file output-filename)) | |
89 | ;; (define-logical-name "SYS$OUTPUT" (concat output-filename "-NEW")) | |
90 | ;; (send-command-to-subprocess 1 command) | |
91 | ;; (send-command-to-subprocess 1 (concat | |
92 | ;; "RENAME " output-filename | |
93 | ;; "-NEW " output-filename)) | |
94 | ;; (while (not (file-exists-p output-filename)) | |
95 | ;; (sleep-for 1)) | |
96 | ;; (define-logical-name "SYS$OUTPUT" nil) | |
97 | ;; (insert-file output-filename) | |
98 | ;; (delete-file output-filename)))) | |
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99 | |
100 | (defun subprocess-command () | |
101 | "Starts asynchronous subprocess if not running and switches to its window." | |
102 | (interactive) | |
103 | (if (not subprocess-running) | |
104 | (start-subprocess)) | |
105 | (and subprocess-running | |
106 | (progn (pop-to-buffer subprocess-buf) (goto-char (point-max))))) | |
107 | ||
108 | (defun command-send-input () | |
109 | "If at last line of buffer, sends the current line to | |
110 | the spawned subprocess. Otherwise brings back current | |
111 | line to the last line for resubmission." | |
112 | (interactive) | |
113 | (beginning-of-line) | |
ceee4f5d | 114 | (let ((current-line (buffer-substring (point) (line-end-position)))) |
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115 | (if (eobp) |
116 | (progn | |
117 | (if (not subprocess-running) | |
118 | (start-subprocess)) | |
119 | (if subprocess-running | |
120 | (progn | |
121 | (beginning-of-line) | |
122 | (send-command-to-subprocess 1 current-line) | |
123 | (if command-prefix-string | |
124 | (progn (beginning-of-line) (insert command-prefix-string))) | |
125 | (next-line 1)))) | |
126 | ;; else -- if not at last line in buffer | |
ceee4f5d | 127 | (goto-char (point-max)) |
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128 | (backward-char) |
129 | (next-line 1) | |
ceee4f5d SM |
130 | (insert |
131 | (if (compare-strings command-prefix-string nil nil | |
132 | current-line 0 (length command-prefix-string)) | |
133 | (substring current-line (length command-prefix-string)) | |
134 | current-line))))) | |
0d20f9a0 | 135 | |
ceee4f5d | 136 | (defun command-kill-line () |
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137 | "Kills the current line. Used in command mode." |
138 | (interactive) | |
139 | (beginning-of-line) | |
140 | (kill-line)) | |
141 | ||
142 | (define-key esc-map "$" 'subprocess-command) | |
d501f516 | 143 | |
ceee4f5d | 144 | ;; arch-tag: 600b2512-f903-4887-bcd2-e76b306f5b66 |
d501f516 | 145 | ;;; vmsproc.el ends here |