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a726e0d1 | 1 | ;; Process Emacs shell arguments |
4746118a | 2 | ;; Copyright (C) 1985, 1986, 1992 Free Software Foundation, Inc. |
a726e0d1 JB |
3 | |
4 | ;; This file is part of GNU Emacs. | |
5 | ||
6 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
7 | ;; it under the terms of the GNU General Public License as published by | |
4746118a | 8 | ;; the Free Software Foundation; either version 2, or (at your option) |
a726e0d1 JB |
9 | ;; any later version. |
10 | ||
11 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
12 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | ;; GNU General Public License for more details. | |
15 | ||
16 | ;; You should have received a copy of the GNU General Public License | |
17 | ;; along with GNU Emacs; see the file COPYING. If not, write to | |
18 | ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | ||
20 | ||
21 | ; These are processed only at the beginning of the argument list. | |
22 | ; -batch execute noninteractively (messages go to stdout, | |
23 | ; variable noninteractive set to t) | |
24 | ; This option must be the first in the arglist. | |
25 | ; Processed by `main' in emacs.c -- never seen by lisp | |
26 | ; -t file Specify to use file rather than stdin/stdout | |
27 | ; as the terminal. | |
28 | ; This option must be the first in the arglist. | |
29 | ; Processed by `main' in emacs.c -- never seen by lisp | |
30 | ; -nw Inhibit the use of any window-system-specific display | |
31 | ; code; use the current virtual terminal. | |
32 | ; This option must be the first in the arglist. | |
33 | ; Processed by `main' in emacs.c -- never seen by lisp | |
34 | ; -q load no init file | |
35 | ; -no-init-file same | |
36 | ; -u user load user's init file | |
37 | ; -user user same | |
38 | ; -debug-init Don't catch errors in init file; let debugger run. | |
39 | ||
40 | ; These are processed in the order encountered. | |
41 | ; -f function execute function | |
42 | ; -funcall function same | |
43 | ; -l file load file | |
44 | ; -load file same | |
45 | ; -i file insert file into buffer | |
46 | ; -insert file same | |
47 | ; file visit file | |
48 | ; -kill kill (exit) emacs | |
49 | ||
50 | (setq top-level '(normal-top-level)) | |
51 | ||
52 | (defvar command-line-processed nil "t once command line has been processed") | |
53 | ||
54 | (defconst inhibit-startup-message nil | |
55 | "*Non-nil inhibits the initial startup messages. | |
56 | This is for use in your personal init file, once you are familiar | |
57 | with the contents of the startup message.") | |
58 | ||
59 | (defconst inhibit-default-init nil | |
60 | "*Non-nil inhibits loading the `default' library.") | |
61 | ||
62 | (defconst command-switch-alist nil | |
63 | "Alist of command-line switches. | |
64 | Elements look like (SWITCH-STRING . HANDLER-FUNCTION). | |
65 | HANDLER-FUNCTION receives switch name as sole arg; | |
66 | remaining command-line args are in the variable `command-line-args-left'.") | |
67 | ||
68 | (defvar command-line-functions nil ;; lrs 7/31/89 | |
69 | "List of functions to process unrecognized command-line arguments. | |
70 | Each function should access the dynamically bound variables | |
71 | argi (the current argument) and command-line-args-left (the remaining | |
72 | arguments). The function should return non-nil only if it recognizes and | |
73 | processes argi. If it does so, it may consume successive arguments by | |
74 | altering command-line-args-left to remove them.") | |
75 | ||
3fc958a4 JB |
76 | (defvar pre-init-hook nil |
77 | "Functions to call after handling urgent options but before loading init file. | |
f35fe3c6 | 78 | The screen system uses this to open screens to display messages while |
3fc958a4 JB |
79 | Emacs loads the user's initialization file.") |
80 | ||
a726e0d1 JB |
81 | (defvar term-setup-hook nil |
82 | "Function to be called after loading terminal-specific lisp code. | |
83 | It is called with no arguments. This variable exists for users to set, | |
84 | so as to override the definitions made by the terminal-specific file. | |
85 | Emacs never sets this variable itself.") | |
86 | ||
87 | (defvar keyboard-type nil | |
88 | "The brand of keyboard you are using. This variable is used to define | |
89 | the proper function and keypad keys for use under X. It is used in a | |
90 | fashion analogous to the environment value TERM.") | |
91 | ||
92 | (defvar window-setup-hook nil | |
3fc958a4 JB |
93 | "Function called to initialize window system display. |
94 | Emacs calls this after processing the command line arguments and loading | |
95 | the user's init file. | |
96 | ||
a726e0d1 JB |
97 | Users should not set this variable; use term-setup-hook instead.") |
98 | ||
99 | (defconst initial-major-mode 'lisp-interaction-mode | |
100 | "Major mode command symbol to use for the initial *scratch* buffer.") | |
101 | ||
102 | (defvar init-file-user nil | |
103 | "Identity of user whose `.emacs' file is or was read. | |
104 | The value may be the null string or a string containing a user's name. | |
105 | If the value is a null string, it means that the init file was taken from | |
106 | the user that originally logged in. | |
107 | ||
108 | In all cases, `(concat \"~\" init-file-user \"/\")' evaluates to the | |
109 | directory name of the directory where the `.emacs' file was looked for.") | |
110 | ||
111 | (defvar init-file-debug nil) | |
112 | ||
113 | (defun normal-top-level () | |
114 | (if command-line-processed | |
115 | (message "Back to top level.") | |
116 | (setq command-line-processed t) | |
117 | ;; In presence of symlinks, switch to cleaner form of default directory. | |
ffd56f97 JB |
118 | (if (not (eq system-type 'vax-vms)) |
119 | (mapcar (function | |
120 | (lambda (var) | |
f76475ad | 121 | (let ((value (getenv var))) |
ffd56f97 JB |
122 | (if (and value |
123 | (< (length value) (length default-directory)) | |
124 | (equal (file-attributes default-directory) | |
125 | (file-attributes value))) | |
126 | (setq default-directory | |
127 | (file-name-as-directory value)))))) | |
128 | '("PWD" "HOME"))) | |
a726e0d1 JB |
129 | (let ((tail directory-abbrev-alist)) |
130 | (while tail | |
131 | (if (string-match (car (car tail)) default-directory) | |
132 | (setq default-directory | |
133 | (concat (cdr (car tail)) | |
134 | (substring default-directory (match-end 0))))) | |
135 | (setq tail (cdr tail)))) | |
136 | (unwind-protect | |
137 | (command-line) | |
138 | (run-hooks 'emacs-startup-hook) | |
139 | (and term-setup-hook | |
140 | (run-hooks 'term-setup-hook)) | |
141 | (and window-setup-hook | |
142 | (run-hooks 'window-setup-hook))))) | |
143 | ||
144 | (defun command-line () | |
145 | ;; See if we should import version-control from the envionment variable. | |
146 | (let ((vc (getenv "VERSION_CONTROL"))) | |
147 | (cond ((eq vc nil)) ;don't do anything if not set | |
148 | ((or (string= vc "t") | |
149 | (string= vc "numbered")) | |
150 | (setq version-control t)) | |
151 | ((or (string= vc "nil") | |
152 | (string= vc "existing")) | |
153 | (setq version-control nil)) | |
154 | ((or (string= vc "never") | |
155 | (string= vc "simple")) | |
156 | (setq version-control 'never)))) | |
157 | ||
f35fe3c6 | 158 | ;; Choose a good default value for split-window-keep-point. |
c35f9044 | 159 | (setq split-window-keep-point (> baud-rate 2400)) |
f35fe3c6 | 160 | |
a726e0d1 JB |
161 | ;; Read window system's init file if using a window system. |
162 | (if (and window-system (not noninteractive)) | |
c35f9044 JB |
163 | (load (concat term-file-prefix |
164 | (symbol-name window-system) | |
165 | "-win") | |
166 | ;; Every window system should have a startup file; | |
167 | ;; barf if we can't find it. | |
168 | nil t)) | |
a726e0d1 | 169 | |
03e3c30a JB |
170 | (let ((done nil) |
171 | (args (cdr command-line-args))) | |
172 | ||
a726e0d1 JB |
173 | ;; Figure out which user's init file to load, |
174 | ;; either from the environment or from the options. | |
175 | (setq init-file-user (if noninteractive nil (user-login-name))) | |
176 | ;; If user has not done su, use current $HOME to find .emacs. | |
177 | (and init-file-user (string= init-file-user (user-real-login-name)) | |
178 | (setq init-file-user "")) | |
03e3c30a JB |
179 | |
180 | ;; Process the command-line args, and delete the arguments | |
181 | ;; processed. This is consistent with the way main in emacs.c | |
182 | ;; does things. | |
a726e0d1 JB |
183 | (while (and (not done) args) |
184 | (let ((argi (car args))) | |
185 | (cond | |
186 | ((or (string-equal argi "-q") | |
187 | (string-equal argi "-no-init-file")) | |
188 | (setq init-file-user nil | |
189 | args (cdr args))) | |
190 | ((or (string-equal argi "-u") | |
191 | (string-equal argi "-user")) | |
192 | (setq args (cdr args) | |
193 | init-file-user (car args) | |
194 | args (cdr args))) | |
195 | ((string-equal argi "-debug-init") | |
196 | (setq init-file-debug t | |
197 | args (cdr args))) | |
03e3c30a JB |
198 | (t (setq done t))))) |
199 | ||
200 | ;; Re-attach the program name to the front of the arg list. | |
201 | (setcdr command-line-args args)) | |
a726e0d1 | 202 | |
f35fe3c6 | 203 | (run-hooks 'pre-init-hook) |
3fc958a4 | 204 | |
a726e0d1 JB |
205 | ;; Load that user's init file, or the default one, or none. |
206 | (let ((debug-on-error init-file-debug) | |
207 | ;; This function actually reads the init files. | |
208 | (inner | |
209 | (function | |
210 | (lambda () | |
211 | (if init-file-user | |
212 | (progn (load (if (eq system-type 'vax-vms) | |
213 | "sys$login:.emacs" | |
214 | (concat "~" init-file-user "/.emacs")) | |
215 | t t t) | |
216 | (or inhibit-default-init | |
217 | (let ((inhibit-startup-message nil)) | |
218 | ;; Users are supposed to be told their rights. | |
219 | ;; (Plus how to get help and how to undo.) | |
220 | ;; Don't you dare turn this off for anyone | |
221 | ;; except yourself. | |
222 | (load "default" t t))))))))) | |
223 | (if init-file-debug | |
224 | ;; Do this without a condition-case if the user wants to debug. | |
225 | (funcall inner) | |
226 | (condition-case error | |
227 | (funcall inner) | |
228 | (error (message "Error in init file: %s%s%s" | |
229 | (get (car error) 'error-message) | |
230 | (if (cdr error) ": ") | |
231 | (mapconcat 'prin1-to-string (cdr error) ", ")))))) | |
3fc958a4 | 232 | |
a726e0d1 JB |
233 | ;; If *scratch* exists and init file didn't change its mode, initialize it. |
234 | (if (get-buffer "*scratch*") | |
235 | (save-excursion | |
236 | (set-buffer "*scratch*") | |
237 | (if (eq major-mode 'fundamental-mode) | |
238 | (funcall initial-major-mode)))) | |
239 | ;; Load library for our terminal type. | |
240 | ;; User init file can set term-file-prefix to nil to prevent this. | |
241 | (and term-file-prefix (not noninteractive) (not window-system) | |
242 | (let ((term (getenv "TERM")) | |
243 | hyphend) | |
244 | (while (and term | |
245 | (not (load (concat term-file-prefix term) t t))) | |
246 | ;; Strip off last hyphen and what follows, then try again | |
247 | (if (setq hyphend (string-match "[-_][^-_]+$" term)) | |
248 | (setq term (substring term 0 hyphend)) | |
249 | (setq term nil))))) | |
250 | ||
03e3c30a | 251 | ;; Process the remaining args. |
a726e0d1 JB |
252 | (command-line-1 (cdr command-line-args)) |
253 | ||
254 | ;; If -batch, terminate after processing the command options. | |
255 | (if noninteractive (kill-emacs t))) | |
256 | ||
257 | (defun command-line-1 (command-line-args-left) | |
258 | (if (null command-line-args-left) | |
259 | (cond ((and (not inhibit-startup-message) (not noninteractive) | |
260 | ;; Don't clobber a non-scratch buffer if init file | |
261 | ;; has selected it. | |
262 | (string= (buffer-name) "*scratch*") | |
263 | (not (input-pending-p))) | |
264 | ;; If there are no switches to process, we might as well | |
265 | ;; run this hook now, and there may be some need to do it | |
266 | ;; before doing any output. | |
267 | (and term-setup-hook | |
268 | (run-hooks 'term-setup-hook)) | |
269 | ;; Don't let the hook be run twice. | |
270 | (setq term-setup-hook nil) | |
271 | (and window-setup-hook | |
272 | (run-hooks 'window-setup-hook)) | |
273 | (setq window-setup-hook nil) | |
274 | (unwind-protect | |
275 | (progn | |
276 | (insert (emacs-version) | |
277 | " | |
3fc958a4 | 278 | Copyright (C) 1991 Free Software Foundation, Inc.\n\n") |
a726e0d1 JB |
279 | ;; If keys have their default meanings, |
280 | ;; use precomputed string to save lots of time. | |
281 | (if (and (eq (key-binding "\C-h") 'help-command) | |
282 | (eq (key-binding "\C-xu") 'advertised-undo) | |
283 | (eq (key-binding "\C-x\C-c") 'save-buffers-kill-emacs) | |
284 | (eq (key-binding "\C-h\C-c") 'describe-copying) | |
285 | (eq (key-binding "\C-h\C-d") 'describe-distribution) | |
286 | (eq (key-binding "\C-h\C-w") 'describe-no-warranty) | |
287 | (eq (key-binding "\C-ht") 'help-with-tutorial)) | |
288 | (insert | |
289 | "Type C-h for help; C-x u to undo changes. (`C-' means use CTRL key.) | |
290 | To kill the Emacs job, type C-x C-c. | |
291 | Type C-h t for a tutorial on using Emacs. | |
292 | ||
293 | GNU Emacs comes with ABSOLUTELY NO WARRANTY; type C-h C-w for full details. | |
294 | You may give out copies of Emacs; type C-h C-c to see the conditions. | |
295 | Type C-h C-d for information on getting the latest version.") | |
296 | (insert (substitute-command-keys | |
297 | "Type \\[help-command] for help; \\[advertised-undo] to undo changes. (`C-' means use CTRL key.) | |
298 | To kill the Emacs job, type \\[save-buffers-kill-emacs]. | |
299 | Type \\[help-with-tutorial] for a tutorial on using Emacs. | |
300 | ||
301 | GNU Emacs comes with ABSOLUTELY NO WARRANTY; type \\[describe-no-warranty] for full details. | |
302 | You may give out copies of Emacs; type \\[describe-copying] to see the conditions. | |
303 | Type \\[describe-distribution] for information on getting the latest version."))) | |
304 | (set-buffer-modified-p nil) | |
305 | (sit-for 120)) | |
306 | (save-excursion | |
307 | ;; In case the Emacs server has already selected | |
308 | ;; another buffer, erase the one our message is in. | |
309 | (set-buffer (get-buffer "*scratch*")) | |
310 | (erase-buffer) | |
311 | (set-buffer-modified-p nil))))) | |
312 | (let ((dir default-directory) | |
313 | (file-count 0) | |
314 | first-file-buffer | |
315 | (line 0)) | |
316 | (while command-line-args-left | |
317 | (let ((argi (car command-line-args-left)) | |
318 | tem) | |
319 | (setq command-line-args-left (cdr command-line-args-left)) | |
320 | (cond ((setq tem (assoc argi command-switch-alist)) | |
321 | (funcall (cdr tem) argi)) | |
a726e0d1 JB |
322 | ((or (string-equal argi "-f") ;what the manual claims |
323 | (string-equal argi "-funcall") | |
324 | (string-equal argi "-e")) ; what the source used to say | |
325 | (setq tem (intern (car command-line-args-left))) | |
326 | (setq command-line-args-left (cdr command-line-args-left)) | |
327 | (funcall tem)) | |
328 | ((or (string-equal argi "-l") | |
329 | (string-equal argi "-load")) | |
330 | (let ((file (car command-line-args-left))) | |
331 | ;; Take file from default dir if it exists there; | |
332 | ;; otherwise let `load' search for it. | |
333 | (if (file-exists-p (expand-file-name file)) | |
334 | (setq file (expand-file-name file))) | |
335 | (load file nil t)) | |
336 | (setq command-line-args-left (cdr command-line-args-left))) | |
337 | ((or (string-equal argi "-i") | |
338 | (string-equal argi "-insert")) | |
339 | (insert-file-contents (car command-line-args-left)) | |
340 | (setq command-line-args-left (cdr command-line-args-left))) | |
341 | ((string-equal argi "-kill") | |
342 | (kill-emacs t)) | |
343 | ((string-match "^\\+[0-9]+\\'" argi) | |
344 | (setq line (string-to-int argi))) | |
345 | (t | |
346 | ;; We have almost exhausted our options. See if the | |
347 | ;; user has made any other command-line options available | |
348 | (let ((hooks command-line-functions);; lrs 7/31/89 | |
349 | (did-hook nil)) | |
350 | (while (and hooks | |
351 | (not (setq did-hook (funcall (car hooks))))) | |
352 | (setq hooks (cdr hooks))) | |
353 | (if (not did-hook) | |
354 | ;; Ok, presume that the argument is a file name | |
355 | (progn | |
356 | (setq file-count (1+ file-count)) | |
357 | (cond ((= file-count 1) | |
358 | (setq first-file-buffer | |
359 | (find-file (expand-file-name argi dir)))) | |
360 | (t | |
361 | (find-file-other-window (expand-file-name argi dir)))) | |
362 | (or (zerop line) | |
363 | (goto-line line)) | |
364 | (setq line 0)))))))) | |
365 | ;; If 3 or more files visited, and not all visible, | |
366 | ;; show user what they all are. | |
367 | (if (> file-count 2) | |
368 | (or (get-buffer-window first-file-buffer) | |
369 | (progn (other-window) | |
370 | (buffer-menu))))))) |