lisp/startup.el

   1 ;;; startup.el --- process Emacs shell arguments
   2
   3 ;; Copyright (C) 1985, 86, 92, 94, 95, 1996 Free Software Foundation, Inc.
   4
   5 ;; Maintainer: FSF
   6 ;; Keywords: internal
   7
   8 ;; This file is part of GNU Emacs.
   9
  10 ;; GNU Emacs is free software; you can redistribute it and/or modify
  11 ;; it under the terms of the GNU General Public License as published by
  12 ;; the Free Software Foundation; either version 2, or (at your option)
  13 ;; any later version.
  14
  15 ;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU General Public License for more details.
  19
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  23 ;; Boston, MA 02111-1307, USA.
  24
  25 ;;; Commentary:
  26
  27 ;; This file parses the command line and gets Emacs running.  Options on
  28 ;; the command line are handled in precedence order.  The order is the
  29 ;; one in the list below; first described means first handled.  Options
  30 ;; within each category (delimited by a bar) are handled in the order
  31 ;; encountered on the command line.
  32
  33 ;; -------------------------
  34 ;; -version                  Print Emacs version to stderr, then exit
  35 ;; --version                 successfully right away.
  36 ;;                           This option is handled by emacs.c
  37 ;; -------------------------
  38 ;; -help                     Print a short usage description and exit
  39 ;; --help                    successfully right away.
  40 ;;                           This option is handled by emacs.c
  41 ;; -------------------------
  42 ;; -nl                       Do not use shared memory (for systems that
  43 ;; -no-shared-memory         support this) for the dumped Emacs data.
  44 ;;                           This option is handled by emacs.c
  45 ;;
  46 ;; -map                      For VMS.
  47 ;; --map-data                This option is handled by emacs.c
  48 ;; -------------------------
  49 ;; -t FILE                   Use FILE as the name of the terminal.
  50 ;; --terminal FILE           Using this implies "-nw" also.
  51 ;;                           This option is handled by emacs.c
  52 ;; -------------------------
  53 ;; -d DISPNAME               Use DISPNAME as the name of the X-windows
  54 ;; -display DISPNAME         display for the initial frame.
  55 ;; --display DISPNAME        This option is handled by emacs.c
  56 ;; -------------------------
  57 ;; -nw                       Do not use a windows system (but use the
  58 ;; --no-windows              terminal instead.)
  59 ;;                           This option is handled by emacs.c
  60 ;; -------------------------
  61 ;; -batch                    Execute noninteractively (messages go to stdout,
  62 ;; --batch                   variable noninteractive set to t)
  63 ;;                           This option is handled by emacs.c
  64 ;; -------------------------
  65 ;; -q                        Do not load user's init file and do not load
  66 ;; -no-init-file             "default.el".  Regardless of this switch,
  67 ;; --no-init-file            "site-start" is still loaded.
  68 ;; -------------------------
  69 ;; -no-site-file             Do not load "site-start.el".  (This is the ONLY
  70 ;; --no-site-file            way to prevent loading that file.)
  71 ;; -------------------------
  72 ;; -u USER                   Load USER's init file instead of the init
  73 ;; -user USER                file belonging to the user starting Emacs.
  74 ;; --user USER
  75 ;; -------------------------
  76 ;; -debug-init               Don't catch errors in init files; let the
  77 ;; --debug-init              debugger run.
  78 ;; -------------------------
  79 ;; -i ICONTYPE               Set type of icon using when Emacs is
  80 ;; -itype ICONTYPE           iconified under X-windows.
  81 ;; --icon-type ICONTYPE      This option is passed on to term/x-win.el
  82 ;;
  83 ;; -iconic                   Start Emacs iconified under X-windows.
  84 ;; --iconic                  This option is passed on to term/x-win.el
  85 ;; -------------------------
  86 ;; Various X-windows options for colors/fonts/geometry/title etc.
  87 ;; These options are passed on to term/x-win.el which see.  Certain
  88 ;; of these are also found in term/pc-win.el
  89 ;; -------------------------
  90 ;; FILE                      Visit FILE.
  91 ;;
  92 ;; -L DIRNAME                Add DIRNAME to load-path
  93 ;; -directory DIRNAME
  94 ;; --directory DIRNAME
  95 ;;
  96 ;; -l FILE                   Load and execute the Emacs lisp code
  97 ;; -load FILE                in FILE.
  98 ;; --load FILE
  99 ;;
 100 ;; -f FUNC                   Execute Emacs lisp function FUNC with
 101 ;; -funcall FUNC             no arguments.  The "-e" form is outdated
 102 ;; --funcall FUNC            and should not be used.  (It's a typo
 103 ;; -e FUNC                   promoted to a feature.)
 104 ;;
 105 ;; -eval FORM                Execute Emacs lisp form FORM.
 106 ;; --eval FORM
 107 ;;
 108 ;; -insert FILE              Insert the contents of FILE into buffer.
 109 ;; --insert FILE
 110 ;; -------------------------
 111 ;; -kill                     Kill (exit) Emacs right away.
 112 ;; --kill
 113 ;; -------------------------
 114
 115 ;;; Code:
 116
 117 (setq top-level '(normal-top-level))
 118
 119 (defvar command-line-processed nil "t once command line has been processed")
 120
 121 (defconst inhibit-startup-message nil
 122   "*Non-nil inhibits the initial startup message.
 123 This is for use in your personal init file, once you are familiar
 124 with the contents of the startup message.")
 125
 126 (defconst inhibit-startup-echo-area-message nil
 127   "*Non-nil inhibits the initial startup echo area message.
 128 Inhibition takes effect only if your `.emacs' file contains
 129 a line of this form:
 130  (setq inhibit-startup-echo-area-message \"YOUR-USER-NAME\")
 131 If your `.emacs' file is byte-compiled, use the following form instead:
 132  (eval '(setq inhibit-startup-echo-area-message \"YOUR-USER-NAME\"))
 133 Thus, someone else using a copy of your `.emacs' file will see
 134 the startup message unless he personally acts to inhibit it.")
 135
 136 (defconst inhibit-default-init nil
 137   "*Non-nil inhibits loading the `default' library.")
 138
 139 (defconst command-switch-alist nil
 140   "Alist of command-line switches.
 141 Elements look like (SWITCH-STRING . HANDLER-FUNCTION).
 142 HANDLER-FUNCTION receives switch name as sole arg;
 143 remaining command-line args are in the variable `command-line-args-left'.")
 144
 145 (defvar command-line-args-left nil
 146   "List of command-line args not yet processed.")
 147
 148 (defvar command-line-functions nil    ;; lrs 7/31/89
 149   "List of functions to process unrecognized command-line arguments.
 150 Each function should access the dynamically bound variables
 151 `argi' (the current argument) and `command-line-args-left' (the remaining
 152 arguments).  The function should return non-nil only if it recognizes and
 153 processes `argi'.  If it does so, it may consume successive arguments by
 154 altering `command-line-args-left' to remove them.")
 155
 156 (defvar command-line-default-directory nil
 157   "Default directory to use for command line arguments.
 158 This is normally copied from `default-directory' when Emacs starts.")
 159
 160 ;;; This is here, rather than in x-win.el, so that we can ignore these
 161 ;;; options when we are not using X.
 162 (defvar command-line-x-option-alist
 163   '(("-bw" 1 x-handle-numeric-switch border-width)
 164     ("-d" 1 x-handle-display)
 165     ("-display" 1 x-handle-display)
 166     ("-name" 1 x-handle-name-rn-switch)
 167     ("-rn" 1 x-handle-name-rn-switch)
 168     ("-title" 1 x-handle-switch title)
 169     ("-T" 1 x-handle-switch title)
 170     ("-r" 0 x-handle-switch reverse t)
 171     ("-rv" 0 x-handle-switch reverse t)
 172     ("-reverse" 0 x-handle-switch reverse t)
 173     ("-reverse-video" 0 x-handle-switch reverse t)
 174     ("-fn" 1 x-handle-switch font)
 175     ("-font" 1 x-handle-switch font)
 176     ("-ib" 1 x-handle-numeric-switch internal-border-width)
 177     ("-g" 1 x-handle-geometry)
 178     ("-geometry" 1 x-handle-geometry)
 179     ("-fg" 1 x-handle-switch foreground-color)
 180     ("-foreground" 1 x-handle-switch foreground-color)
 181     ("-bg" 1 x-handle-switch background-color)
 182     ("-background" 1 x-handle-switch background-color)
 183     ("-ms" 1 x-handle-switch mouse-color)
 184     ("-itype" 0 x-handle-switch icon-type t)
 185     ("-i" 0 x-handle-switch icon-type t)
 186     ("-iconic" 0 x-handle-iconic)
 187     ("-xrm" 1 x-handle-xrm-switch)
 188     ("-cr" 1 x-handle-switch cursor-color)
 189     ("-vb" 0 x-handle-switch vertical-scroll-bars t)
 190     ("-hb" 0 x-handle-switch horizontal-scroll-bars t)
 191     ("-bd" 1 x-handle-switch)
 192     ("--border-width" 1 x-handle-numeric-switch border-width)
 193     ("--display" 1 x-handle-display)
 194     ("--name" 1 x-handle-name-rn-switch)
 195     ("--title" 1 x-handle-switch title)
 196     ("--reverse-video" 0 x-handle-switch reverse t)
 197     ("--font" 1 x-handle-switch font)
 198     ("--internal-border" 1 x-handle-numeric-switch internal-border-width)
 199     ("--geometry" 1 x-handle-geometry)
 200     ("--foreground-color" 1 x-handle-switch foreground-color)
 201     ("--background-color" 1 x-handle-switch background-color)
 202     ("--mouse-color" 1 x-handle-switch mouse-color)
 203     ("--icon-type" 0 x-handle-switch icon-type t)
 204     ("--iconic" 0 x-handle-iconic)
 205     ("--xrm" 1 x-handle-xrm-switch)
 206     ("--cursor-color" 1 x-handle-switch cursor-color)
 207     ("--vertical-scroll-bars" 0 x-handle-switch vertical-scroll-bars t)
 208     ("--border-color" 1 x-handle-switch border-width))
 209   "Alist of X Windows options.
 210 Each element has the form
 211   (NAME NUMARGS HANDLER FRAME-PARAM VALUE)
 212 where NAME is the option name string, NUMARGS is the number of arguments
 213 that the option accepts, HANDLER is a function to call to handle the option.
 214 FRAME-PARAM (optional) is the frame parameter this option specifies,
 215 and VALUE is the value which is given to that frame parameter
 216 \(most options use the argument for this, so VALUE is not present).")
 217
 218 (defvar before-init-hook nil
 219   "Normal hook run after handling urgent options but before loading init files.")
 220
 221 (defvar after-init-hook nil
 222   "Normal hook run after loading the init files, `~/.emacs' and `default.el'.
 223 There is no `condition-case' around the running of these functions;
 224 therefore, if you set `debug-on-error' non-nil in `.emacs',
 225 an error in one of these functions will invoke the debugger.")
 226
 227 (defvar emacs-startup-hook nil
 228   "Normal hook run after loading init files and handling the command line.")
 229
 230 (defvar term-setup-hook nil
 231   "Normal hook run after loading terminal-specific Lisp code.
 232 It also follows `emacs-startup-hook'.  This hook exists for users to set,
 233 so as to override the definitions made by the terminal-specific file.
 234 Emacs never sets this variable itself.")
 235
 236 (defvar keyboard-type nil
 237   "The brand of keyboard you are using.
 238 This variable is used to define
 239 the proper function and keypad keys for use under X.  It is used in a
 240 fashion analogous to the environment value TERM.")
 241
 242 (defvar window-setup-hook nil
 243   "Normal hook run to initialize window system display.
 244 Emacs runs this hook after processing the command line arguments and loading
 245 the user's init file.")
 246
 247 (defconst initial-major-mode 'lisp-interaction-mode
 248   "Major mode command symbol to use for the initial *scratch* buffer.")
 249
 250 (defvar init-file-user nil
 251   "Identity of user whose `.emacs' file is or was read.
 252 The value is nil if no init file is being used; otherwise, it may be either
 253 the null string, meaning that the init file was taken from the user that
 254 originally logged in, or it may be a string containing a user's name.
 255
 256 In either of the latter cases, `(concat \"~\" init-file-user \"/\")'
 257 evaluates to the name of the directory where the `.emacs' file was
 258 looked for.
 259
 260 Setting `init-file-user' does not prevent Emacs from loading
 261 `site-start.el'.  The only way to do that is to use `--no-site-file'.")
 262
 263 (defvar site-run-file "site-start"
 264   "File containing site-wide run-time initializations.
 265 This file is loaded at run-time before `~/.emacs'.  It contains inits
 266 that need to be in place for the entire site, but which, due to their
 267 higher incidence of change, don't make sense to load into emacs'
 268 dumped image.  Thus, the run-time load order is: 1. file described in
 269 this variable, if non-nil; 2. `~/.emacs'; 3. `default.el'.
 270
 271 Don't use the `site-start.el' file for things some users may not like.
 272 Put them in `default.el' instead, so that users can more easily
 273 override them.  Users can prevent loading `default.el' with the `-q'
 274 option or by setting `inhibit-default-init' in their own init files,
 275 but inhibiting `site-start.el' requires `--no-site-file', which
 276 is less convenient.")
 277
 278 (defconst iso-8859-1-locale-regexp "8859[-_]?1"
 279   "Regexp that specifies when to enable the ISO 8859-1 character set.
 280 We do that if this regexp matches the locale name
 281 specified by the LC_ALL, LC_CTYPE and LANG environment variables.")
 282
 283 (defvar mail-host-address nil
 284   "*Name of this machine, for purposes of naming users.")
 285
 286 (defvar user-mail-address nil
 287   "*Full mailing address of this user.
 288 This is initialized based on `mail-host-address',
 289 after your init file is read, in case it sets `mail-host-address'.")
 290
 291 (defvar auto-save-list-file-prefix
 292   (if (eq system-type 'ms-dos)
 293       "~/_s"  ; MS-DOS cannot have initial dot, and allows only 8.3 names
 294     "~/.saves-")
 295   "Prefix for generating `auto-save-list-file-name'.
 296 This is used after reading your `.emacs' file to initialize
 297 `auto-save-list-file-name', by appending Emacs's pid and the system name,
 298 if you have not already set `auto-save-list-file-name' yourself.
 299 Set this to nil if you want to prevent `auto-save-list-file-name'
 300 from being initialized.")
 301
 302 (defvar init-file-debug nil)
 303
 304 (defvar init-file-had-error nil)
 305
 306 ;; This function is called from the subdirs.el file.
 307 (defun normal-top-level-add-to-load-path (dirs)
 308   (let ((tail (member default-directory load-path)))
 309     (setcdr tail (append (mapcar 'expand-file-name dirs) (cdr tail)))))
 310
 311 (defun normal-top-level ()
 312   (if command-line-processed
 313       (message "Back to top level.")
 314     (setq command-line-processed t)
 315     ;; Give *Messages* the same default-directory as *scratch*,
 316     ;; just to keep things predictable.
 317     (let ((dir default-directory))
 318       (save-excursion
 319         (set-buffer (get-buffer "*Messages*"))
 320         (setq default-directory dir)))
 321     ;; Look in each dir in load-path for a subdirs.el file.
 322     ;; If we find one, load it, which will add the appropriate subdirs
 323     ;; of that dir into load-path,
 324     (let ((tail load-path)
 325           new)
 326       (while tail
 327         (setq new (cons (car tail) new))
 328         (let ((default-directory (car tail)))
 329           (load (expand-file-name "subdirs.el" (car tail)) t t t))
 330         (setq tail (cdr tail))))
 331     (if (not (eq system-type 'vax-vms))
 332         (progn
 333           ;; If the PWD environment variable isn't accurate, delete it.
 334           (let ((pwd (getenv "PWD")))
 335             (and (stringp pwd)
 336                  ;; Use FOO/., so that if FOO is a symlink, file-attributes
 337                  ;; describes the directory linked to, not FOO itself.
 338                  (or (equal (file-attributes
 339                              (concat (file-name-as-directory pwd) "."))
 340                             (file-attributes
 341                              (concat (file-name-as-directory default-directory)
 342                                      ".")))
 343                      (setq process-environment
 344                            (delete (concat "PWD=" pwd)
 345                                    process-environment)))))))
 346     (setq default-directory (abbreviate-file-name default-directory))
 347     (let ((menubar-bindings-done nil))
 348       (unwind-protect
 349           (command-line)
 350         ;; Do this again, in case .emacs defined more abbreviations.
 351         (setq default-directory (abbreviate-file-name default-directory))
 352         ;; Specify the file for recording all the auto save files of this session.
 353         ;; This is used by recover-session.
 354         (or auto-save-list-file-name
 355             (and auto-save-list-file-prefix
 356                  (setq auto-save-list-file-name
 357                        ;; Under MS-DOS our PID is almost always reused between
 358                        ;; Emacs invocations.  We need something more unique.
 359                        (if (eq system-type 'ms-dos)
 360                            (concat
 361                             (make-temp-name
 362                              (expand-file-name auto-save-list-file-prefix))
 363                             "~")
 364
 365                          (expand-file-name (format "%s%d-%s~"
 366                                                    auto-save-list-file-prefix
 367                                                    (emacs-pid)
 368                                                    (system-name)))))))
 369         (run-hooks 'emacs-startup-hook)
 370         (and term-setup-hook
 371              (run-hooks 'term-setup-hook))
 372         ;; Modify the initial frame based on what .emacs puts into
 373         ;; ...-frame-alist.
 374         (if (fboundp 'frame-notice-user-settings)
 375             (frame-notice-user-settings))
 376         ;; Now we know the user's default font, so add it to the menu.
 377         (if (fboundp 'font-menu-add-default)
 378             (font-menu-add-default))
 379         (and window-setup-hook
 380              (run-hooks 'window-setup-hook))
 381         (or menubar-bindings-done
 382             (if (or (eq window-system 'x) (eq window-system 'win32))
 383                 (precompute-menubar-bindings)))))))
 384
 385 ;; Precompute the keyboard equivalents in the menu bar items.
 386 (defun precompute-menubar-bindings ()
 387   (let ((submap (lookup-key global-map [menu-bar])))
 388     (while submap
 389       (and (consp (car submap))
 390            (symbolp (car (car submap)))
 391            (stringp (car-safe (cdr (car submap))))
 392            (keymapp (cdr (cdr (car submap))))
 393            (progn
 394              (x-popup-menu nil (cdr (cdr (car submap))))
 395              (if purify-flag
 396                  (garbage-collect))))
 397       (setq submap (cdr submap))))
 398   (setq define-key-rebound-commands t))
 399
 400 (defun command-line ()
 401   (setq command-line-default-directory default-directory)
 402
 403   ;; See if we should import version-control from the environment variable.
 404   (let ((vc (getenv "VERSION_CONTROL")))
 405     (cond ((eq vc nil))                 ;don't do anything if not set
 406           ((or (string= vc "t")
 407                (string= vc "numbered"))
 408            (setq version-control t))
 409           ((or (string= vc "nil")
 410                (string= vc "existing"))
 411            (setq version-control nil))
 412           ((or (string= vc "never")
 413                (string= vc "simple"))
 414            (setq version-control 'never))))
 415
 416   (if (let ((ctype
 417              ;; Use the first of these three envvars that has a nonempty value.
 418              (or (let ((string (getenv "LC_ALL")))
 419                    (and (not (equal string "")) string))
 420                  (let ((string (getenv "LC_CTYPE")))
 421                    (and (not (equal string "")) string))
 422                  (let ((string (getenv "LANG")))
 423                    (and (not (equal string "")) string)))))
 424         (and ctype
 425              (string-match iso-8859-1-locale-regexp ctype)))
 426       (progn
 427         (require 'disp-table)
 428         (standard-display-european t)
 429         (require 'iso-syntax)))
 430
 431   ;;! This has been commented out; I currently find the behavior when
 432   ;;! split-window-keep-point is nil disturbing, but if I can get used
 433   ;;! to it, then it would be better to eliminate the option.
 434   ;;! ;; Choose a good default value for split-window-keep-point.
 435   ;;! (setq split-window-keep-point (> baud-rate 2400))
 436
 437   ;; Read window system's init file if using a window system.
 438   (condition-case error
 439       (if (and window-system (not noninteractive))
 440           (load (concat term-file-prefix
 441                         (symbol-name window-system)
 442                         "-win")
 443                 ;; Every window system should have a startup file;
 444                 ;; barf if we can't find it.
 445                 nil t))
 446     ;; If we can't read it, print the error message and exit.
 447     (error
 448      (princ
 449       (if (eq (car error) 'error)
 450           (apply 'concat (cdr error))
 451         (if (memq 'file-error (get (car error) 'error-conditions))
 452             (format "%s: %s"
 453                      (nth 1 error)
 454                      (mapconcat '(lambda (obj) (prin1-to-string obj t))
 455                                 (cdr (cdr error)) ", "))
 456           (format "%s: %s"
 457                    (get (car error) 'error-message)
 458                    (mapconcat '(lambda (obj) (prin1-to-string obj t))
 459                               (cdr error) ", "))))
 460       'external-debugging-output)
 461      (setq window-system nil)
 462      (kill-emacs)))
 463
 464   (let ((done nil)
 465         (args (cdr command-line-args)))
 466
 467     ;; Figure out which user's init file to load,
 468     ;; either from the environment or from the options.
 469     (setq init-file-user (if noninteractive nil (user-login-name)))
 470     ;; If user has not done su, use current $HOME to find .emacs.
 471     (and init-file-user (string= init-file-user (user-real-login-name))
 472          (setq init-file-user ""))
 473
 474     ;; Process the command-line args, and delete the arguments
 475     ;; processed.  This is consistent with the way main in emacs.c
 476     ;; does things.
 477     (while (and (not done) args)
 478       (let ((longopts '(("--no-init-file") ("--no-site-file") ("--user")
 479                         ("--debug-init") ("--iconic") ("--icon-type")))
 480             (argi (car args))
 481             (argval nil))
 482         ;; Handle --OPTION=VALUE format.
 483         (if (and (string-match "\\`--" argi)
 484                  (string-match "=" argi))
 485             (setq argval (substring argi (match-end 0))
 486                   argi (substring argi 0 (match-beginning 0))))
 487         (let ((completion (try-completion argi longopts)))
 488           (if (eq completion t)
 489               (setq argi (substring argi 1))
 490             (if (stringp completion)
 491                 (let ((elt (assoc completion longopts)))
 492                   (or elt
 493                       (error "Option `%s' is ambiguous" argi))
 494                   (setq argi (substring (car elt) 1)))
 495               (setq argval nil))))
 496         (cond
 497          ((or (string-equal argi "-q")
 498               (string-equal argi "-no-init-file"))
 499           (setq init-file-user nil
 500                 args (cdr args)))
 501          ((or (string-equal argi "-u")
 502               (string-equal argi "-user"))
 503           (or argval
 504               (setq args (cdr args)
 505                     argval (car args)))
 506           (setq init-file-user argval
 507                 argval nil
 508                 args (cdr args)))
 509          ((string-equal argi "-no-site-file")
 510           (setq site-run-file nil
 511                 args (cdr args)))
 512          ((string-equal argi "-debug-init")
 513           (setq init-file-debug t
 514                 args (cdr args)))
 515          ((string-equal argi "-iconic")
 516           (setq initial-frame-alist
 517                 (cons '(visibility . icon) initial-frame-alist))
 518           (setq args (cdr args)))
 519          ((or (string-equal argi "-icon-type")
 520               (string-equal argi "-i")
 521               (string-equal argi "-itype"))
 522           (setq default-frame-alist
 523                 (cons '(icon-type . t) default-frame-alist))
 524           (setq args (cdr args)))
 525          (t (setq done t)))
 526         ;; Was argval set but not used?
 527         (and argval
 528              (error "Option `%s' doesn't allow an argument" argi))))
 529
 530     ;; Re-attach the program name to the front of the arg list.
 531     (and command-line-args (setcdr command-line-args args)))
 532
 533   ;; Under X Windows, this creates the X frame and deletes the terminal frame.
 534   (if (fboundp 'face-initialize)
 535       (face-initialize))
 536   (if (fboundp 'frame-initialize)
 537       (frame-initialize))
 538   ;; If frame was created with a menu bar, set menu-bar-mode on.
 539   (if (or (not (or (eq window-system 'x) (eq window-system 'win32)))
 540           (> (cdr (assq 'menu-bar-lines (frame-parameters))) 0))
 541       (menu-bar-mode t))
 542
 543   (run-hooks 'before-init-hook)
 544
 545   ;; Run the site-start library if it exists.  The point of this file is
 546   ;; that it is run before .emacs.  There is no point in doing this after
 547   ;; .emacs; that is useless.
 548   (if site-run-file
 549       (load site-run-file t t))
 550
 551   ;; Sites should not disable this.  Only individuals should disable
 552   ;; the startup message.
 553   (setq inhibit-startup-message nil)
 554
 555   ;; Load that user's init file, or the default one, or none.
 556   (let (debug-on-error-from-init-file
 557         debug-on-error-should-be-set
 558         (debug-on-error-initial
 559          (if (eq init-file-debug t) 'startup init-file-debug)))
 560     (let ((debug-on-error debug-on-error-initial)
 561           ;; This function actually reads the init files.
 562           (inner
 563            (function
 564             (lambda ()
 565               (if init-file-user
 566                   (progn
 567                     (setq user-init-file
 568                           (cond
 569                            ((eq system-type 'ms-dos)
 570                             (concat "~" init-file-user "/_emacs"))
 571                            ((eq system-type 'windows-nt)
 572                             (if (file-exists-p "~/.emacs")
 573                                 "~/.emacs"
 574                               "~/_emacs"))
 575                            ((eq system-type 'vax-vms)
 576                             "sys$login:.emacs")
 577                            (t
 578                             (concat "~" init-file-user "/.emacs"))))
 579                     (load user-init-file t t t)
 580                     (or inhibit-default-init
 581                         (let ((inhibit-startup-message nil))
 582                           ;; Users are supposed to be told their rights.
 583                           ;; (Plus how to get help and how to undo.)
 584                           ;; Don't you dare turn this off for anyone
 585                           ;; except yourself.
 586                           (load "default" t t)))))))))
 587       (if init-file-debug
 588           ;; Do this without a condition-case if the user wants to debug.
 589           (funcall inner)
 590         (condition-case error
 591             (progn
 592               (funcall inner)
 593               (setq init-file-had-error nil))
 594           (error (message "Error in init file: %s%s%s"
 595                           (get (car error) 'error-message)
 596                           (if (cdr error) ": " "")
 597                           (mapconcat 'prin1-to-string (cdr error) ", "))
 598                  (setq init-file-had-error t))))
 599       ;; If we can tell that the init file altered debug-on-error,
 600       ;; arrange to preserve the value that it set up.
 601       (or (eq debug-on-error debug-on-error-initial)
 602           (setq debug-on-error-should-be-set t
 603                 debug-on-error-from-init-file debug-on-error)))
 604     (if debug-on-error-should-be-set
 605         (setq debug-on-error debug-on-error-from-init-file)))
 606
 607   ;; Do this here in case the init file sets mail-host-address.
 608   (or user-mail-address
 609       (setq user-mail-address (concat (user-login-name) "@"
 610                                       (or mail-host-address
 611                                           (system-name)))))
 612
 613   (run-hooks 'after-init-hook)
 614
 615   ;; If *scratch* exists and init file didn't change its mode, initialize it.
 616   (if (get-buffer "*scratch*")
 617       (save-excursion
 618         (set-buffer "*scratch*")
 619         (if (eq major-mode 'fundamental-mode)
 620             (funcall initial-major-mode))))
 621   ;; Load library for our terminal type.
 622   ;; User init file can set term-file-prefix to nil to prevent this.
 623   (and term-file-prefix (not noninteractive) (not window-system)
 624        (let ((term (getenv "TERM"))
 625              hyphend)
 626          (while (and term
 627                      (not (load (concat term-file-prefix term) t t)))
 628            ;; Strip off last hyphen and what follows, then try again
 629            (if (setq hyphend (string-match "[-_][^-_]+$" term))
 630                (setq term (substring term 0 hyphend))
 631              (setq term nil)))))
 632
 633   ;; Process the remaining args.
 634   (command-line-1 (cdr command-line-args))
 635
 636   ;; If -batch, terminate after processing the command options.
 637   (if noninteractive (kill-emacs t)))
 638
 639 (defun command-line-1 (command-line-args-left)
 640   (or noninteractive (input-pending-p) init-file-had-error
 641       (and inhibit-startup-echo-area-message
 642            (let ((buffer (get-buffer-create " *temp*")))
 643              (prog1
 644                  (condition-case nil
 645                      (save-excursion
 646                        (set-buffer buffer)
 647                        (insert-file-contents user-init-file)
 648                        (re-search-forward
 649                         (concat
 650                          "([ \t\n]*setq[ \t\n]+"
 651                          "inhibit-startup-echo-area-message[ \t\n]+"
 652                          (regexp-quote
 653                           (prin1-to-string
 654                            (if (string= init-file-user "")
 655                                (user-login-name)
 656                              init-file-user)))
 657                          "[ \t\n]*)")
 658                         nil t))
 659                    (error nil))
 660                (kill-buffer buffer))))
 661       (message (if (eq (key-binding "\C-h\C-p") 'describe-project)
 662                    "For information about the GNU Project and its goals, type C-h C-p."
 663                  (substitute-command-keys
 664                   "For information about the GNU Project and its goals, type \\[describe-project]."))))
 665   (if (null command-line-args-left)
 666       (cond ((and (not inhibit-startup-message) (not noninteractive)
 667                   ;; Don't clobber a non-scratch buffer if init file
 668                   ;; has selected it.
 669                   (string= (buffer-name) "*scratch*")
 670                   (not (input-pending-p)))
 671              ;; If there are no switches to process, we might as well
 672              ;; run this hook now, and there may be some need to do it
 673              ;; before doing any output.
 674              (and term-setup-hook
 675                   (run-hooks 'term-setup-hook))
 676              ;; Don't let the hook be run twice.
 677              (setq term-setup-hook nil)
 678
 679              ;; It's important to notice the user settings before we
 680              ;; display the startup message; otherwise, the settings
 681              ;; won't take effect until the user gives the first
 682              ;; keystroke, and that's distracting.
 683              (if (fboundp 'frame-notice-user-settings)
 684                  (frame-notice-user-settings))
 685
 686              (and window-setup-hook
 687                   (run-hooks 'window-setup-hook))
 688              (setq window-setup-hook nil)
 689              ;; Do this now to avoid an annoying delay if the user
 690              ;; clicks the menu bar during the sit-for.
 691              (if (or (eq window-system 'x) (eq window-system 'win32))
 692                  (precompute-menubar-bindings))
 693              (setq menubar-bindings-done t)
 694              (unwind-protect
 695                  (progn
 696                    ;; The convention for this piece of code is that
 697                    ;; each piece of output starts with one or two newlines
 698                    ;; and does not end with any newlines.
 699                    (insert (emacs-version)
 700                            "
 701 Copyright (C) 1996 Free Software Foundation, Inc.")
 702                    ;; If keys have their default meanings,
 703                    ;; use precomputed string to save lots of time.
 704                    (if (and (eq (key-binding "\C-h") 'help-command)
 705                             (eq (key-binding "\C-xu") 'advertised-undo)
 706                             (eq (key-binding "\C-x\C-c") 'save-buffers-kill-emacs)
 707                             (eq (key-binding "\C-ht") 'help-with-tutorial)
 708                             (eq (key-binding "\C-hi") 'info))
 709                        (insert "\n
 710 Type C-x C-c to exit Emacs.
 711 Type C-h for help; C-x u to undo changes.
 712 Type C-h t for a tutorial on using Emacs.
 713 Type C-h i to enter Info, which you can use to read GNU documentation.")
 714                      (insert (substitute-command-keys
 715                               (format "\n
 716 Type \\[save-buffers-kill-emacs] to exit Emacs.
 717 Type %s for help; \\[advertised-undo] to undo changes.
 718 Type \\[help-with-tutorial] for a tutorial on using Emacs.
 719 Type \\[info] to enter Info, which you can use to read GNU documentation."
 720                                       (let ((where (where-is-internal
 721                                                     'help-command nil t)))
 722                                         (if where
 723                                             (key-description where)
 724                                           "M-x help"))))))
 725                    ;; Many users seem to have problems with these.
 726                    (insert "
 727 (`C-' means use the CTRL key.  `M-' means use the Meta (or Alt) key.
 728 If you have no Meta key, you may instead type ESC followed by the character.)")
 729                    ;; Say how to use the menu bar
 730                    ;; if that is not with the mouse.
 731                    (if (not (assq 'display (frame-parameters)))
 732                        (if (eq (key-binding "\M-`") 'tmm-menubar)
 733                            (insert "\n\nType F10 or M-` to use the menu bar.")
 734                          (insert (substitute-command-keys
 735                                   "\n\nType \\[tmm-menubar] to use the menu bar."))))
 736
 737                    ;; Windows and MSDOS (currently) do not count as
 738                    ;; window systems, but do have mouse support.
 739                    (if window-system
 740                        (insert "\n
 741 C-mouse-3 (third mouse button, with Control) gets a mode-specific menu."))
 742                    (and auto-save-list-file-prefix
 743                         (directory-files
 744                          (file-name-directory auto-save-list-file-prefix)
 745                          nil
 746                          (concat "\\`"
 747                                  (regexp-quote (file-name-nondirectory
 748                                                 auto-save-list-file-prefix)))
 749                          t)
 750                         (insert "\n\nIf an Emacs session crashed recently,\n"
 751                                 "type M-x recover-session RET to recover"
 752                                 " the files you were editing."))
 753
 754                    (if (and (eq (key-binding "\C-h\C-c") 'describe-copying)
 755                             (eq (key-binding "\C-h\C-d") 'describe-distribution)
 756                             (eq (key-binding "\C-h\C-w") 'describe-no-warranty))
 757                        (insert
 758                         "\n
 759 GNU Emacs comes with ABSOLUTELY NO WARRANTY; type C-h C-w for full details.
 760 You may give out copies of Emacs; type C-h C-c to see the conditions.
 761 Type C-h C-d for information on getting the latest version.")
 762                      (insert (substitute-command-keys
 763                               "\n
 764 GNU Emacs comes with ABSOLUTELY NO WARRANTY; type \\[describe-no-warranty] for full details.
 765 You may give out copies of Emacs; type \\[describe-copying] to see the conditions.
 766 Type \\[describe-distribution] for information on getting the latest version.")))
 767
 768                    (set-buffer-modified-p nil)
 769                    (sit-for 120))
 770                (save-excursion
 771                  ;; In case the Emacs server has already selected
 772                  ;; another buffer, erase the one our message is in.
 773                  (set-buffer (get-buffer "*scratch*"))
 774                  (erase-buffer)
 775                  (set-buffer-modified-p nil)))))
 776     ;; Delay 2 seconds after the init file error message
 777     ;; was displayed, so user can read it.
 778     (if init-file-had-error
 779         (sit-for 2))
 780     (let ((dir command-line-default-directory)
 781           (file-count 0)
 782           first-file-buffer
 783           (line 0))
 784       (while command-line-args-left
 785         (let* ((argi (car command-line-args-left))
 786                (orig-argi argi)
 787                ;; This includes our standard options' long versions
 788                ;; and long versions of what's on command-switch-alist.
 789                (longopts
 790                 (append '(("--funcall") ("--load") ("--insert") ("--kill")
 791                           ("--directory") ("--eval"))
 792                         (mapcar '(lambda (elt)
 793                                    (list (concat "-" (car elt))))
 794                                 command-switch-alist)))
 795                tem argval completion
 796                ;; List of directories specified in -L/--directory,
 797                ;; in reverse of the order specified.
 798                extra-load-path
 799                (initial-load-path load-path))
 800           (setq command-line-args-left (cdr command-line-args-left))
 801
 802           ;; Add the long X options to longopts.
 803           (setq tem command-line-x-option-alist)
 804           (while tem
 805             (if (string-match "^--" (car (car tem)))
 806                 (setq longopts (cons (list (car (car tem))) longopts)))
 807             (setq tem (cdr tem)))
 808
 809           ;; Convert long options to ordinary options
 810           ;; and separate out an attached option argument into argval.
 811           (if (string-match "^--[^=]*=" argi)
 812               (setq argval (substring argi (match-end 0))
 813                     argi (substring argi 0 (1- (match-end 0)))))
 814           (setq completion (try-completion argi longopts))
 815           (if (eq completion t)
 816               (setq argi (substring argi 1))
 817             (if (stringp completion)
 818                 (let ((elt (assoc completion longopts)))
 819                   (or elt
 820                       (error "Option `%s' is ambiguous" argi))
 821                   (setq argi (substring (car elt) 1)))
 822               (setq argval nil argi orig-argi)))
 823
 824           ;; Execute the option.
 825           (cond ((setq tem (assoc argi command-switch-alist))
 826                  (if argval
 827                      (let ((command-line-args-left
 828                             (cons argval command-line-args-left)))
 829                        (funcall (cdr tem) argi))
 830                    (funcall (cdr tem) argi)))
 831                 ((or (string-equal argi "-f")  ;what the manual claims
 832                      (string-equal argi "-funcall")
 833                      (string-equal argi "-e")) ; what the source used to say
 834                  (if argval
 835                      (setq tem (intern argval))
 836                    (setq tem (intern (car command-line-args-left)))
 837                    (setq command-line-args-left (cdr command-line-args-left)))
 838                  (if (arrayp (symbol-function tem))
 839                      (command-execute tem)
 840                    (funcall tem)))
 841                 ((string-equal argi "-eval")
 842                  (if argval
 843                      (setq tem argval)
 844                    (setq tem (car command-line-args-left))
 845                    (setq command-line-args-left (cdr command-line-args-left)))
 846                  (eval (read tem)))
 847                 ;; Set the default directory as specified in -L.
 848                 ((or (string-equal argi "-L")
 849                      (string-equal argi "-directory"))
 850                  (if argval
 851                      (setq tem argval)
 852                    (setq tem (car command-line-args-left)
 853                          command-line-args-left (cdr command-line-args-left)))
 854                  (setq tem (command-line-normalize-file-name tem))
 855                  (setq extra-load-path
 856                        (cons (expand-file-name tem) extra-load-path))
 857                  (setq load-path (append (nreverse extra-load-path)
 858                                          initial-load-path)))
 859                 ((or (string-equal argi "-l")
 860                      (string-equal argi "-load"))
 861                  (if argval
 862                      (setq tem argval)
 863                    (setq tem (car command-line-args-left)
 864                          command-line-args-left (cdr command-line-args-left)))
 865                  (let ((file (command-line-normalize-file-name tem)))
 866                    ;; Take file from default dir if it exists there;
 867                    ;; otherwise let `load' search for it.
 868                    (if (file-exists-p (expand-file-name file))
 869                        (setq file (expand-file-name file)))
 870                    (load file nil t)))
 871                 ((string-equal argi "-insert")
 872                  (if argval
 873                      (setq tem argval)
 874                    (setq tem (car command-line-args-left)
 875                          command-line-args-left (cdr command-line-args-left)))
 876                  (or (stringp tem)
 877                      (error "File name omitted from `-insert' option"))
 878                  (insert-file-contents (command-line-normalize-file-name tem)))
 879                 ((string-equal argi "-kill")
 880                  (kill-emacs t))
 881                 ((string-match "^\\+[0-9]+\\'" argi)
 882                  (setq line (string-to-int argi)))
 883                 ((setq tem (assoc argi command-line-x-option-alist))
 884                  ;; Ignore X-windows options and their args if not using X.
 885                  (setq command-line-args-left
 886                        (nthcdr (nth 1 tem) command-line-args-left)))
 887                 (t
 888                  ;; We have almost exhausted our options. See if the
 889                  ;; user has made any other command-line options available
 890                  (let ((hooks command-line-functions);; lrs 7/31/89
 891                        (did-hook nil))
 892                    (while (and hooks
 893                                (not (setq did-hook (funcall (car hooks)))))
 894                      (setq hooks (cdr hooks)))
 895                    (if (not did-hook)
 896                        ;; Ok, presume that the argument is a file name
 897                        (progn
 898                          (if (string-match "\\`-" argi)
 899                              (error "Unknown option `%s'" argi))
 900                          (setq file-count (1+ file-count))
 901                          (setq argi (command-line-normalize-file-name argi))
 902                          (cond ((= file-count 1)
 903                                 (setq first-file-buffer
 904                                       (find-file (expand-file-name argi dir))))
 905                                (t
 906                                 (find-file-other-window (expand-file-name argi dir))))
 907                          (or (zerop line)
 908                              (goto-line line))
 909                          (setq line 0))))))))
 910       ;; If 3 or more files visited, and not all visible,
 911       ;; show user what they all are.
 912       (if (> file-count 2)
 913           (or (get-buffer-window first-file-buffer)
 914               (progn (other-window 1)
 915                      (buffer-menu)))))))
 916
 917 (defun command-line-normalize-file-name (file)
 918   "Collapse multiple slashes to one, to handle non-Emacs file names."
 919   (save-match-data
 920     ;; Use arg 1 so that we don't collapse // at the start of the file name.
 921     ;; That is significant on some systems.
 922     ;; However, /// at the beginning is supposed to mean just /, not //.
 923     (if (string-match "^///+" file)
 924         (setq file (replace-match "/" t t file)))
 925     (while (string-match "//+" file 1)
 926       (setq file (replace-match "/" t t file)))
 927     file))
 928
 929 ;;; startup.el ends here