code.delx.au - gnu-emacs/blob - lisp/startup.el

   1 ;;; startup.el --- process Emacs shell arguments
   2
   3 ;; Copyright (C) 1985, 86, 92, 94, 95, 96, 97, 98, 99, 2000, 2001, 2002
   4 ;;   Free Software Foundation, Inc.
   5
   6 ;; Maintainer: FSF
   7 ;; Keywords: internal
   8
   9 ;; This file is part of GNU Emacs.
  10
  11 ;; GNU Emacs is free software; you can redistribute it and/or modify
  12 ;; it under the terms of the GNU General Public License as published by
  13 ;; the Free Software Foundation; either version 2, or (at your option)
  14 ;; any later version.
  15
  16 ;; GNU Emacs is distributed in the hope that it will be useful,
  17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ;; GNU General Public License for more details.
  20
  21 ;; You should have received a copy of the GNU General Public License
  22 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  23 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  24 ;; Boston, MA 02111-1307, USA.
  25
  26 ;;; Commentary:
  27
  28 ;; This file parses the command line and gets Emacs running.  Options on
  29 ;; the command line are handled in precedence order.  The order is the
  30 ;; one in the list below; first described means first handled.  Options
  31 ;; within each category (delimited by a bar) are handled in the order
  32 ;; encountered on the command line.
  33
  34 ;; -------------------------
  35 ;; -version                  Print Emacs version to stderr, then exit
  36 ;; --version                 successfully right away.
  37 ;;                           This option is handled by emacs.c
  38 ;; -------------------------
  39 ;; -help                     Print a short usage description and exit
  40 ;; --help                    successfully right away.
  41 ;;                           This option is handled by emacs.c
  42 ;; -------------------------
  43 ;; -nl                       Do not use shared memory (for systems that
  44 ;; -no-shared-memory         support this) for the dumped Emacs data.
  45 ;;                           This option is handled by emacs.c
  46 ;;
  47 ;; -map                      For VMS.
  48 ;; --map-data                This option is handled by emacs.c
  49 ;; -------------------------
  50 ;; -t FILE                   Use FILE as the name of the terminal.
  51 ;; --terminal FILE           Using this implies "-nw" also.
  52 ;;                           This option is handled by emacs.c
  53 ;; -------------------------
  54 ;; -d DISPNAME               Use DISPNAME as the name of the X
  55 ;; -display DISPNAME         display for the initial frame.
  56 ;; --display DISPNAME        This option is handled by emacs.c
  57 ;; -------------------------
  58 ;; -nw                       Do not use a windows system (but use the
  59 ;; --no-window-system        terminal instead.)
  60 ;;                           This option is handled by emacs.c
  61 ;; -------------------------
  62 ;; -batch                    Execute noninteractively (messages go to stdout,
  63 ;; --batch                   variable noninteractive set to t)
  64 ;;                           This option is handled by emacs.c
  65 ;; -------------------------
  66 ;; -q                        Do not load user's init file and do not load
  67 ;; -no-init-file             "default.el".  Regardless of this switch,
  68 ;; --no-init-file            "site-start" is still loaded.
  69 ;; -------------------------
  70 ;; -no-site-file             Do not load "site-start.el".  (This is the ONLY
  71 ;; --no-site-file            way to prevent loading that file.)
  72 ;; -------------------------
  73 ;; -no-splash                 Don't display a splash screen on startup.
  74 ;; --no-splash
  75 ;; -------------------------
  76 ;; -u USER                   Load USER's init file instead of the init
  77 ;; -user USER                file belonging to the user starting Emacs.
  78 ;; --user USER
  79 ;; -------------------------
  80 ;; -debug-init               Don't catch errors in init files; let the
  81 ;; --debug-init              debugger run.
  82 ;; -------------------------
  83 ;; -i ICONTYPE               Set type of icon using when Emacs is
  84 ;; -itype ICONTYPE           iconified under X.
  85 ;; --icon-type ICONTYPE      This option is passed on to term/x-win.el
  86 ;;
  87 ;; -iconic                   Start Emacs iconified.
  88 ;; --iconic                  This option is passed on to term/x-win.el
  89 ;; -------------------------
  90 ;; Various X options for colors/fonts/geometry/title etc.
  91 ;; These options are passed on to term/x-win.el which see.
  92 ;; -------------------------
  93 ;; FILE                      Visit FILE.
  94 ;; -visit FILE
  95 ;; --visit FILE
  96 ;; -file FILE
  97 ;; --file FILE
  98 ;;
  99 ;; -L DIRNAME                Add DIRNAME to load-path
 100 ;; -directory DIRNAME
 101 ;; --directory DIRNAME
 102 ;;
 103 ;; -l FILE                   Load and execute the Emacs lisp code
 104 ;; -load FILE                in FILE.
 105 ;; --load FILE
 106 ;;
 107 ;; -f FUNC                   Execute Emacs lisp function FUNC with
 108 ;; -funcall FUNC             no arguments.  The "-e" form is outdated
 109 ;; --funcall FUNC            and should not be used.  (It's a typo
 110 ;; -e FUNC                   promoted to a feature.)
 111 ;;
 112 ;; -eval FORM                Execute Emacs lisp form FORM.
 113 ;; --eval FORM
 114 ;; -execute EXPR
 115 ;; --execute EXPR
 116 ;;
 117 ;; -insert FILE              Insert the contents of FILE into buffer.
 118 ;; --insert FILE
 119 ;; -------------------------
 120 ;; -kill                     Kill (exit) Emacs right away.
 121 ;; --kill
 122 ;; -------------------------
 123
 124 ;;; Code:
 125
 126 (setq top-level '(normal-top-level))
 127
 128 (defvar command-line-processed nil
 129   "Non-nil once command line has been processed.")
 130
 131 (defgroup initialization nil
 132   "Emacs start-up procedure"
 133   :group 'internal)
 134
 135 (defcustom inhibit-startup-message nil
 136   "*Non-nil inhibits the initial startup message.
 137 This is for use in your personal init file, once you are familiar
 138 with the contents of the startup message."
 139   :type 'boolean
 140   :group 'initialization)
 141
 142 (defvaralias 'inhibit-splash-screen 'inhibit-startup-message)
 143
 144 (defcustom inhibit-startup-echo-area-message nil
 145   "*Non-nil inhibits the initial startup echo area message.
 146 Setting this variable takes effect
 147 only if you do it with the customization buffer
 148 or if your `.emacs' file contains a line of this form:
 149  (setq inhibit-startup-echo-area-message \"YOUR-USER-NAME\")
 150 If your `.emacs' file is byte-compiled, use the following form instead:
 151  (eval '(setq inhibit-startup-echo-area-message \"YOUR-USER-NAME\"))
 152 Thus, someone else using a copy of your `.emacs' file will see
 153 the startup message unless he personally acts to inhibit it."
 154   :type '(choice (const :tag "Don't inhibit")
 155                  (string :tag "Enter your user name, to inhibit"))
 156   :group 'initialization)
 157
 158 (defcustom inhibit-default-init nil
 159   "*Non-nil inhibits loading the `default' library."
 160   :type 'boolean
 161   :group 'initialization)
 162
 163 (defcustom inhibit-startup-buffer-menu nil
 164   "*Non-nil inhibits display of buffer list when more than 2 files are loaded."
 165   :type 'boolean
 166   :group 'initialization)
 167
 168 (defvar command-switch-alist nil
 169   "Alist of command-line switches.
 170 Elements look like (SWITCH-STRING . HANDLER-FUNCTION).
 171 HANDLER-FUNCTION receives switch name as sole arg;
 172 remaining command-line args are in the variable `command-line-args-left'.")
 173
 174 (defvar command-line-args-left nil
 175   "List of command-line args not yet processed.")
 176
 177 (defvar command-line-functions nil    ;; lrs 7/31/89
 178   "List of functions to process unrecognized command-line arguments.
 179 Each function should access the dynamically bound variables
 180 `argi' (the current argument) and `command-line-args-left' (the remaining
 181 arguments).  The function should return non-nil only if it recognizes and
 182 processes `argi'.  If it does so, it may consume successive arguments by
 183 altering `command-line-args-left' to remove them.")
 184
 185 (defvar command-line-default-directory nil
 186   "Default directory to use for command line arguments.
 187 This is normally copied from `default-directory' when Emacs starts.")
 188
 189 ;;; This is here, rather than in x-win.el, so that we can ignore these
 190 ;;; options when we are not using X.
 191 (defconst command-line-x-option-alist
 192   '(("-bw" 1 x-handle-numeric-switch border-width)
 193     ("-d" 1 x-handle-display)
 194     ("-display" 1 x-handle-display)
 195     ("-name" 1 x-handle-name-switch)
 196     ("-title" 1 x-handle-switch title)
 197     ("-T" 1 x-handle-switch title)
 198     ("-r" 0 x-handle-switch reverse t)
 199     ("-rv" 0 x-handle-switch reverse t)
 200     ("-reverse" 0 x-handle-switch reverse t)
 201     ("-reverse-video" 0 x-handle-switch reverse t)
 202     ("-fn" 1 x-handle-switch font)
 203     ("-font" 1 x-handle-switch font)
 204     ("-fs" 0 x-handle-initial-switch fullscreen fullboth)
 205     ("-fw" 0 x-handle-initial-switch fullscreen fullwidth)
 206     ("-fh" 0 x-handle-initial-switch fullscreen fullheight)
 207     ("-ib" 1 x-handle-numeric-switch internal-border-width)
 208     ("-g" 1 x-handle-geometry)
 209     ("-lsp" 1 x-handle-numeric-switch line-spacing)
 210     ("-geometry" 1 x-handle-geometry)
 211     ("-fg" 1 x-handle-switch foreground-color)
 212     ("-foreground" 1 x-handle-switch foreground-color)
 213     ("-bg" 1 x-handle-switch background-color)
 214     ("-background" 1 x-handle-switch background-color)
 215     ("-ms" 1 x-handle-switch mouse-color)
 216     ("-itype" 0 x-handle-switch icon-type t)
 217     ("-i" 0 x-handle-switch icon-type t)
 218     ("-iconic" 0 x-handle-iconic)
 219     ("-xrm" 1 x-handle-xrm-switch)
 220     ("-cr" 1 x-handle-switch cursor-color)
 221     ("-vb" 0 x-handle-switch vertical-scroll-bars t)
 222     ("-hb" 0 x-handle-switch horizontal-scroll-bars t)
 223     ("-bd" 1 x-handle-switch)
 224     ("--border-width" 1 x-handle-numeric-switch border-width)
 225     ("--display" 1 x-handle-display)
 226     ("--name" 1 x-handle-name-switch)
 227     ("--title" 1 x-handle-switch title)
 228     ("--reverse-video" 0 x-handle-switch reverse t)
 229     ("--font" 1 x-handle-switch font)
 230     ("--fullscreen" 0 x-handle-initial-switch fullscreen fullboth)
 231     ("--fullwidth" 0 x-handle-initial-switch fullscreen fullwidth)
 232     ("--fullheight" 0 x-handle-initial-switch fullscreen fullheight)
 233     ("--internal-border" 1 x-handle-numeric-switch internal-border-width)
 234     ("--geometry" 1 x-handle-geometry)
 235     ("--foreground-color" 1 x-handle-switch foreground-color)
 236     ("--background-color" 1 x-handle-switch background-color)
 237     ("--mouse-color" 1 x-handle-switch mouse-color)
 238     ("--icon-type" 0 x-handle-switch icon-type t)
 239     ("--iconic" 0 x-handle-iconic)
 240     ("--xrm" 1 x-handle-xrm-switch)
 241     ("--cursor-color" 1 x-handle-switch cursor-color)
 242     ("--vertical-scroll-bars" 0 x-handle-switch vertical-scroll-bars t)
 243     ("--line-spacing" 1 x-handle-numeric-switch line-spacing)
 244     ("--border-color" 1 x-handle-switch border-color)
 245     ("--smid" 1 x-handle-smid))
 246   "Alist of X Windows options.
 247 Each element has the form
 248   (NAME NUMARGS HANDLER FRAME-PARAM VALUE)
 249 where NAME is the option name string, NUMARGS is the number of arguments
 250 that the option accepts, HANDLER is a function to call to handle the option.
 251 FRAME-PARAM (optional) is the frame parameter this option specifies,
 252 and VALUE is the value which is given to that frame parameter
 253 \(most options use the argument for this, so VALUE is not present).")
 254
 255 (defvar before-init-hook nil
 256   "Normal hook run after handling urgent options but before loading init files.")
 257
 258 (defvar after-init-hook nil
 259   "Normal hook run after loading the init files, `~/.emacs' and `default.el'.
 260 There is no `condition-case' around the running of these functions;
 261 therefore, if you set `debug-on-error' non-nil in `.emacs',
 262 an error in one of these functions will invoke the debugger.")
 263
 264 (defvar emacs-startup-hook nil
 265   "Normal hook run after loading init files and handling the command line.")
 266
 267 (defvar term-setup-hook nil
 268   "Normal hook run after loading terminal-specific Lisp code.
 269 It also follows `emacs-startup-hook'.  This hook exists for users to set,
 270 so as to override the definitions made by the terminal-specific file.
 271 Emacs never sets this variable itself.")
 272
 273 (defvar inhibit-startup-hooks nil
 274   "Non-nil means don't run `term-setup-hook' and `emacs-startup-hook'.
 275 This is because we already did so.")
 276
 277 (defvar keyboard-type nil
 278   "The brand of keyboard you are using.
 279 This variable is used to define
 280 the proper function and keypad keys for use under X.  It is used in a
 281 fashion analogous to the environment variable TERM.")
 282
 283 (defvar window-setup-hook nil
 284   "Normal hook run to initialize window system display.
 285 Emacs runs this hook after processing the command line arguments and loading
 286 the user's init file.")
 287
 288 (defcustom initial-major-mode 'lisp-interaction-mode
 289   "Major mode command symbol to use for the initial *scratch* buffer."
 290   :type 'function
 291   :group 'initialization)
 292
 293 (defcustom init-file-user nil
 294   "Identity of user whose `.emacs' file is or was read.
 295 The value is nil if `-q' or `--no-init-file' was specified,
 296 meaning do not load any init file.
 297
 298 Otherwise, the value may be the null string, meaning use the init file
 299 for the user that originally logged in, or it may be a
 300 string containing a user's name meaning use that person's init file.
 301
 302 In either of the latter cases, `(concat \"~\" init-file-user \"/\")'
 303 evaluates to the name of the directory where the `.emacs' file was
 304 looked for.
 305
 306 Setting `init-file-user' does not prevent Emacs from loading
 307 `site-start.el'.  The only way to do that is to use `--no-site-file'."
 308   :type '(choice (const :tag "none" nil) string)
 309   :group 'initialization)
 310
 311 (defcustom site-run-file "site-start"
 312   "File containing site-wide run-time initializations.
 313 This file is loaded at run-time before `~/.emacs'.  It contains inits
 314 that need to be in place for the entire site, but which, due to their
 315 higher incidence of change, don't make sense to load into emacs'
 316 dumped image.  Thus, the run-time load order is: 1. file described in
 317 this variable, if non-nil; 2. `~/.emacs'; 3. `default.el'.
 318
 319 Don't use the `site-start.el' file for things some users may not like.
 320 Put them in `default.el' instead, so that users can more easily
 321 override them.  Users can prevent loading `default.el' with the `-q'
 322 option or by setting `inhibit-default-init' in their own init files,
 323 but inhibiting `site-start.el' requires `--no-site-file', which
 324 is less convenient."
 325   :type '(choice (const :tag "none" nil) string)
 326   :group 'initialization)
 327
 328 (defcustom mail-host-address nil
 329   "*Name of this machine, for purposes of naming users."
 330   :type '(choice (const nil) string)
 331   :group 'mail)
 332
 333 (defcustom user-mail-address (if command-line-processed
 334                                  (concat (user-login-name) "@"
 335                                          (or mail-host-address
 336                                              (system-name)))
 337                                ;; Empty string means "not set yet".
 338                                "")
 339   "*Full mailing address of this user.
 340 This is initialized based on `mail-host-address',
 341 after your init file is read, in case it sets `mail-host-address'."
 342   :type 'string
 343   :group 'mail)
 344
 345 (defcustom auto-save-list-file-prefix
 346   (cond ((eq system-type 'ms-dos)
 347          ;; MS-DOS cannot have initial dot, and allows only 8.3 names
 348          "~/_emacs.d/auto-save.list/_s")
 349         (t
 350          "~/.emacs.d/auto-save-list/.saves-"))
 351   "Prefix for generating `auto-save-list-file-name'.
 352 This is used after reading your `.emacs' file to initialize
 353 `auto-save-list-file-name', by appending Emacs's pid and the system name,
 354 if you have not already set `auto-save-list-file-name' yourself.
 355 Directories in the prefix will be created if necessary.
 356 Set this to nil if you want to prevent `auto-save-list-file-name'
 357 from being initialized."
 358   :type '(choice (const :tag "Don't record a session's auto save list" nil)
 359                  string)
 360   :group 'auto-save)
 361
 362 (defvar init-file-debug nil)
 363
 364 (defvar init-file-had-error nil)
 365
 366 (defvar normal-top-level-add-subdirs-inode-list nil)
 367
 368 (defun normal-top-level-add-subdirs-to-load-path ()
 369   "Add all subdirectories of current directory to `load-path'.
 370 More precisely, this uses only the subdirectories whose names
 371 start with letters or digits; it excludes any subdirectory named `RCS'
 372 or `CVS', and any subdirectory that contains a file named `.nosearch'."
 373   (let (dirs
 374         attrs
 375         (pending (list default-directory)))
 376     ;; This loop does a breadth-first tree walk on DIR's subtree,
 377     ;; putting each subdir into DIRS as its contents are examined.
 378     (while pending
 379       (push (pop pending) dirs)
 380       (let* ((this-dir (car dirs))
 381              (contents (directory-files this-dir))
 382              (default-directory this-dir)
 383              (canonicalized (and (eq system-type 'windows-nt)
 384                                  (untranslated-canonical-name this-dir))))
 385         ;; The Windows version doesn't report meaningful inode
 386         ;; numbers, so use the canonicalized absolute file name of the
 387         ;; directory instead.
 388         (setq attrs (or canonicalized
 389                         (nthcdr 10 (file-attributes this-dir))))
 390         (unless (member attrs normal-top-level-add-subdirs-inode-list)
 391           (push attrs normal-top-level-add-subdirs-inode-list)
 392           (dolist (file contents)
 393             ;; The lower-case variants of RCS and CVS are for DOS/Windows.
 394             (unless (member file '("." ".." "RCS" "CVS" "rcs" "cvs"))
 395               (when (and (string-match "\\`[[:alnum:]]" file)
 396                          ;; Avoid doing a `stat' when it isn't necessary
 397                          ;; because that can cause trouble when an NFS server
 398                          ;; is down.
 399                          (not (string-match "\\.elc?\\'" file))
 400                          (file-directory-p file))
 401                 (let ((expanded (expand-file-name file)))
 402                   (unless (file-exists-p (expand-file-name ".nosearch"
 403                                                            expanded))
 404                     (setq pending (nconc pending (list expanded)))))))))))
 405     (normal-top-level-add-to-load-path (cdr (nreverse dirs)))))
 406
 407 ;; This function is called from a subdirs.el file.
 408 ;; It assumes that default-directory is the directory
 409 ;; in which the subdirs.el file exists,
 410 ;; and it adds to load-path the subdirs of that directory
 411 ;; as specified in DIRS.  Normally the elements of DIRS are relative.
 412 (defun normal-top-level-add-to-load-path (dirs)
 413   (let ((tail load-path)
 414         (thisdir (directory-file-name default-directory)))
 415     (while (and tail
 416                 ;;Don't go all the way to the nil terminator.
 417                 (cdr tail)
 418                 (not (equal thisdir (car tail)))
 419                 (not (and (memq system-type '(ms-dos windows-nt))
 420                           (equal (downcase thisdir) (downcase (car tail))))))
 421       (setq tail (cdr tail)))
 422     ;;Splice the new section in.
 423     (when tail
 424       (setcdr tail (append (mapcar 'expand-file-name dirs) (cdr tail))))))
 425
 426 (defun normal-top-level ()
 427   (if command-line-processed
 428       (message "Back to top level.")
 429     (setq command-line-processed t)
 430     ;; Give *Messages* the same default-directory as *scratch*,
 431     ;; just to keep things predictable.
 432     (let ((dir default-directory))
 433       (save-excursion
 434         (set-buffer (get-buffer "*Messages*"))
 435         (setq default-directory dir)))
 436     ;; `user-full-name' is now known; reset its standard-value here.
 437     (put 'user-full-name 'standard-value
 438          (list (default-value 'user-full-name)))
 439     ;; For root, preserve owner and group when editing files.
 440     (if (equal (user-uid) 0)
 441         (setq backup-by-copying-when-mismatch t))
 442     ;; Look in each dir in load-path for a subdirs.el file.
 443     ;; If we find one, load it, which will add the appropriate subdirs
 444     ;; of that dir into load-path,
 445     ;; Look for a leim-list.el file too.  Loading it will register
 446     ;; available input methods.
 447     (let ((tail load-path)
 448           new)
 449       (while tail
 450         (push (car tail) new)
 451         (condition-case nil
 452             (let ((default-directory (car tail)))
 453               (load (expand-file-name "subdirs.el" (car tail)) t t t)))
 454         (condition-case nil
 455             (let ((default-directory (car tail)))
 456               (load (expand-file-name "leim-list.el" (car tail)) t t t)))
 457         (setq tail (cdr tail))))
 458     (if (not (eq system-type 'vax-vms))
 459         (progn
 460           ;; If the PWD environment variable isn't accurate, delete it.
 461           (let ((pwd (getenv "PWD")))
 462             (and (stringp pwd)
 463                  ;; Use FOO/., so that if FOO is a symlink, file-attributes
 464                  ;; describes the directory linked to, not FOO itself.
 465                  (or (equal (file-attributes
 466                              (concat (file-name-as-directory pwd) "."))
 467                             (file-attributes
 468                              (concat (file-name-as-directory default-directory)
 469                                      ".")))
 470                      (setq process-environment
 471                            (delete (concat "PWD=" pwd)
 472                                    process-environment)))))))
 473     (setq default-directory (abbreviate-file-name default-directory))
 474     (let ((menubar-bindings-done nil))
 475       (unwind-protect
 476           (command-line)
 477         ;; Do this again, in case .emacs defined more abbreviations.
 478         (setq default-directory (abbreviate-file-name default-directory))
 479         ;; Specify the file for recording all the auto save files of this session.
 480         ;; This is used by recover-session.
 481         (or auto-save-list-file-name
 482             (and auto-save-list-file-prefix
 483                  (setq auto-save-list-file-name
 484                        ;; Under MS-DOS our PID is almost always reused between
 485                        ;; Emacs invocations.  We need something more unique.
 486                        (cond ((eq system-type 'ms-dos)
 487                               ;; We are going to access the auto-save
 488                               ;; directory, so make sure it exists.
 489                               (make-directory
 490                                (file-name-directory auto-save-list-file-prefix)
 491                                t)
 492                               (concat
 493                                (make-temp-name
 494                                 (expand-file-name
 495                                  auto-save-list-file-prefix))
 496                                "~"))
 497                              (t
 498                               (expand-file-name
 499                                (format "%s%d-%s~"
 500                                        auto-save-list-file-prefix
 501                                        (emacs-pid)
 502                                        (system-name))))))))
 503         (unless inhibit-startup-hooks
 504           (run-hooks 'emacs-startup-hook)
 505           (and term-setup-hook
 506                (run-hooks 'term-setup-hook)))
 507
 508         ;; Don't do this if we failed to create the initial frame,
 509         ;; for instance due to a dense colormap.
 510         (when (or frame-initial-frame
 511                   ;; If frame-initial-frame has no meaning, do this anyway.
 512                   (not (and window-system
 513                             (not noninteractive)
 514                             (not (eq window-system 'pc)))))
 515           ;; Modify the initial frame based on what .emacs puts into
 516           ;; ...-frame-alist.
 517           (if (fboundp 'frame-notice-user-settings)
 518               (frame-notice-user-settings))
 519           (if (fboundp 'frame-set-background-mode)
 520               ;; Set the faces for the initial background mode even if
 521               ;; frame-notice-user-settings didn't (such as on a tty).
 522               ;; frame-set-background-mode is idempotent, so it won't
 523               ;; cause any harm if it's already been done.
 524               (let ((frame-background-mode frame-background-mode)
 525                     (frame (selected-frame))
 526                     term)
 527                 (when (and (null window-system)
 528                            ;; Don't override a possibly customized value.
 529                            (null frame-background-mode)
 530                            ;; Don't override user specifications.
 531                            (null (frame-parameter frame 'reverse))
 532                            (let ((bg (frame-parameter frame 'background-color)))
 533                              (or (null bg)
 534                                  (member bg '(unspecified "unspecified-bg")))))
 535                   (setq term (getenv "TERM"))
 536                   ;; Some files in lisp/term do a better job with the
 537                   ;; background mode, but we leave this here anyway, in
 538                   ;; case they remove those files.
 539                   (if (string-match "^\\(xterm\\|rxvt\\|dtterm\\|eterm\\)"
 540                                     term)
 541                       (setq frame-background-mode 'light)))
 542                 (frame-set-background-mode (selected-frame)))))
 543
 544         ;; Now we know the user's default font, so add it to the menu.
 545         (if (fboundp 'font-menu-add-default)
 546             (font-menu-add-default))
 547         (and window-setup-hook
 548              (run-hooks 'window-setup-hook))
 549         (or menubar-bindings-done
 550             (if (display-popup-menus-p)
 551                 (precompute-menubar-bindings)))))))
 552
 553 ;; Precompute the keyboard equivalents in the menu bar items.
 554 (defun precompute-menubar-bindings ()
 555   (let ((submap (lookup-key global-map [menu-bar])))
 556     (while submap
 557       (and (consp (car submap))
 558            (symbolp (car (car submap)))
 559            (stringp (car-safe (cdr (car submap))))
 560            (keymapp (cdr (cdr (car submap))))
 561            (progn
 562              (x-popup-menu nil (cdr (cdr (car submap))))
 563              (if purify-flag
 564                  (garbage-collect))))
 565       (setq submap (cdr submap))))
 566     (setq define-key-rebound-commands t))
 567
 568 ;; Command-line options supported by tty's:
 569 (defconst tty-long-option-alist
 570   '(("--name"             . "-name")
 571     ("--title"            . "-T")
 572     ("--reverse-video"    . "-reverse")
 573     ("--foreground-color" . "-fg")
 574     ("--background-color" . "-bg")
 575     ("--color"            . "-color")))
 576
 577 (defconst tool-bar-images-pixel-height 24
 578   "Height in pixels of images in the tool bar.")
 579
 580 (defvar tool-bar-originally-present nil
 581   "Non-nil if tool-bars are present before user and site init files are read.")
 582
 583 ;; Handle the X-like command-line arguments "-fg", "-bg", "-name", etc.
 584 (defun tty-handle-args (args)
 585   (let (rest)
 586     (message "%s" args)
 587     (while (and args
 588                 (not (equal (car args) "--")))
 589       (let* ((argi (pop args))
 590              (orig-argi argi)
 591              argval completion)
 592         ;; Check for long options with attached arguments
 593         ;; and separate out the attached option argument into argval.
 594         (when (string-match "^\\(--[^=]*\\)=" argi)
 595           (setq argval (substring argi (match-end 0))
 596                 argi (match-string 1 argi)))
 597         (when (string-match "^--" argi)
 598           (setq completion (try-completion argi tty-long-option-alist))
 599           (if (eq completion t)
 600               ;; Exact match for long option.
 601               (setq argi (cdr (assoc argi tty-long-option-alist)))
 602             (if (stringp completion)
 603                 (let ((elt (assoc completion tty-long-option-alist)))
 604                   ;; Check for abbreviated long option.
 605                   (or elt
 606                       (error "Option `%s' is ambiguous" argi))
 607                   (setq argi (cdr elt)))
 608               ;; Check for a short option.
 609               (setq argval nil
 610                     argi orig-argi))))
 611         (cond ((member argi '("-fg" "-foreground"))
 612                (push (cons 'foreground-color (or argval (pop args)))
 613                      default-frame-alist))
 614               ((member argi '("-bg" "-background"))
 615                (push (cons 'background-color (or argval (pop args)))
 616                      default-frame-alist))
 617               ((member argi '("-T" "-name"))
 618                (unless argval (setq argval (pop args)))
 619                (push (cons 'title
 620                            (if (stringp argval)
 621                                argval
 622                              (let ((case-fold-search t)
 623                                    i)
 624                                (setq argval (invocation-name))
 625
 626                                ;; Change any . or * characters in name to
 627                                ;; hyphens, so as to emulate behavior on X.
 628                                (while
 629                                    (setq i (string-match "[.*]" argval))
 630                                  (aset argval i ?-))
 631                                argval)))
 632                      default-frame-alist))
 633               ((member argi '("-r" "-rv" "-reverse"))
 634                (push '(reverse . t)
 635                      default-frame-alist))
 636               ((equal argi "-color")
 637                (unless argval (setq argval 8)) ; default --color means 8 ANSI colors
 638                (push (cons 'tty-color-mode
 639                            (cond
 640                             ((numberp argval) argval)
 641                             ((string-match "-?[0-9]+" argval)
 642                              (string-to-number argval))
 643                             (t (intern argval))))
 644                      default-frame-alist))
 645               (t
 646                (push argi rest)))))
 647     (nreverse rest)))
 648
 649 (defun command-line ()
 650   (setq command-line-default-directory default-directory)
 651
 652   ;; Choose a reasonable location for temporary files.
 653   (setq temporary-file-directory
 654         (file-name-as-directory
 655          (cond ((memq system-type '(ms-dos windows-nt))
 656                 (or (getenv "TEMP") (getenv "TMPDIR") (getenv "TMP") "c:/temp"))
 657                ((memq system-type '(vax-vms axp-vms))
 658                 (or (getenv "TMPDIR") (getenv "TMP") (getenv "TEMP") "SYS$SCRATCH:"))
 659                (t
 660                 (or (getenv "TMPDIR") (getenv "TMP") (getenv "TEMP") "/tmp")))))
 661   (setq small-temporary-file-directory
 662         (if (eq system-type 'ms-dos)
 663             (getenv "TMPDIR")))
 664   (setq auto-save-file-name-transforms
 665         (list (list "\\`/[^/]*:\\(.+/\\)*\\(.*\\)"
 666                     ;; Don't put "\\2" inside expand-file-name, since
 667                     ;; it will be transformed to "/2" on DOS/Windows.
 668                     (concat temporary-file-directory "\\2") t)))
 669
 670   ;; See if we should import version-control from the environment variable.
 671   (let ((vc (getenv "VERSION_CONTROL")))
 672     (cond ((eq vc nil))                 ;don't do anything if not set
 673           ((member vc '("t" "numbered"))
 674            (setq version-control t))
 675           ((member vc '("nil" "existing"))
 676            (setq version-control nil))
 677           ((member vc '("never" "simple"))
 678            (setq version-control 'never))))
 679
 680   ;;! This has been commented out; I currently find the behavior when
 681   ;;! split-window-keep-point is nil disturbing, but if I can get used
 682   ;;! to it, then it would be better to eliminate the option.
 683   ;;! ;; Choose a good default value for split-window-keep-point.
 684   ;;! (setq split-window-keep-point (> baud-rate 2400))
 685
 686   ;; Set the default strings to display in mode line for
 687   ;; end-of-line formats that aren't native to this platform.
 688   (cond
 689    ((memq system-type '(ms-dos windows-nt emx))
 690     (setq eol-mnemonic-unix "(Unix)"
 691           eol-mnemonic-mac  "(Mac)"))
 692    ;; Both Mac and Unix EOLs are now "native" on Mac OS so keep the
 693    ;; abbreviated strings `/' and `:' set in coding.c for them.
 694    ((eq system-type 'macos)
 695     (setq eol-mnemonic-dos  "(DOS)"))
 696    (t                                   ; this is for Unix/GNU/Linux systems
 697     (setq eol-mnemonic-dos  "(DOS)"
 698           eol-mnemonic-mac  "(Mac)")))
 699
 700   ;; Read window system's init file if using a window system.
 701   (condition-case error
 702       (if (and window-system (not noninteractive))
 703           (load (concat term-file-prefix
 704                         (symbol-name window-system)
 705                         "-win")
 706                 ;; Every window system should have a startup file;
 707                 ;; barf if we can't find it.
 708                 nil t))
 709     ;; If we can't read it, print the error message and exit.
 710     (error
 711      (princ
 712       (if (eq (car error) 'error)
 713           (apply 'concat (cdr error))
 714         (if (memq 'file-error (get (car error) 'error-conditions))
 715             (format "%s: %s"
 716                     (nth 1 error)
 717                     (mapconcat (lambda (obj) (prin1-to-string obj t))
 718                                (cdr (cdr error)) ", "))
 719           (format "%s: %s"
 720                   (get (car error) 'error-message)
 721                   (mapconcat (lambda (obj) (prin1-to-string obj t))
 722                              (cdr error) ", "))))
 723       'external-debugging-output)
 724      (terpri 'external-debugging-output)
 725      (setq window-system nil)
 726      (kill-emacs)))
 727
 728   ;; Windowed displays do this inside their *-win.el.
 729   (unless (or (display-graphic-p) noninteractive)
 730     (setq command-line-args (tty-handle-args command-line-args)))
 731
 732   (set-locale-environment nil)
 733
 734   ;; Convert the arguments to Emacs internal representation.
 735   (let ((args (cdr command-line-args)))
 736     (while args
 737       (setcar args
 738               (decode-coding-string (car args) locale-coding-system t))
 739       (pop args)))
 740
 741   (let ((done nil)
 742         (args (cdr command-line-args)))
 743
 744     ;; Figure out which user's init file to load,
 745     ;; either from the environment or from the options.
 746     (setq init-file-user (if noninteractive nil (user-login-name)))
 747     ;; If user has not done su, use current $HOME to find .emacs.
 748     (and init-file-user
 749          (equal init-file-user (user-real-login-name))
 750          (setq init-file-user ""))
 751
 752     ;; Process the command-line args, and delete the arguments
 753     ;; processed.  This is consistent with the way main in emacs.c
 754     ;; does things.
 755     (while (and (not done) args)
 756       (let* ((longopts '(("--no-init-file") ("--no-site-file") ("--user")
 757                          ("--debug-init") ("--iconic") ("--icon-type")))
 758              (argi (pop args))
 759              (orig-argi argi)
 760              argval)
 761         ;; Handle --OPTION=VALUE format.
 762         (when (string-match "^\\(--[^=]*\\)=" argi)
 763           (setq argval (substring argi (match-end 0))
 764                 argi (match-string 1 argi)))
 765         (unless (equal argi "--")
 766           (let ((completion (try-completion argi longopts)))
 767             (if (eq completion t)
 768                 (setq argi (substring argi 1))
 769               (if (stringp completion)
 770                   (let ((elt (assoc completion longopts)))
 771                     (or elt
 772                         (error "Option `%s' is ambiguous" argi))
 773                     (setq argi (substring (car elt) 1)))
 774                 (setq argval nil
 775                       argi orig-argi)))))
 776         (cond
 777          ((member argi '("-q" "-no-init-file"))
 778           (setq init-file-user nil))
 779          ((member argi '("-u" "-user"))
 780           (setq init-file-user (or argval (pop args))
 781                 argval nil))
 782          ((equal argi "-no-site-file")
 783           (setq site-run-file nil))
 784          ((equal argi "-debug-init")
 785           (setq init-file-debug t))
 786          ((equal argi "-iconic")
 787           (push '(visibility . icon) initial-frame-alist))
 788          ((member argi '("-icon-type" "-i" "-itype"))
 789           (push '(icon-type . t) default-frame-alist))
 790          ;; Push the popped arg back on the list of arguments.
 791          (t
 792           (push argi args)
 793           (setq done t)))
 794         ;; Was argval set but not used?
 795         (and argval
 796              (error "Option `%s' doesn't allow an argument" argi))))
 797
 798     ;; Re-attach the program name to the front of the arg list.
 799     (and command-line-args
 800          (setcdr command-line-args args)))
 801
 802   ;; Under X Windows, this creates the X frame and deletes the terminal frame.
 803   (when (fboundp 'frame-initialize)
 804     (frame-initialize))
 805
 806   ;; If frame was created with a menu bar, set menu-bar-mode on.
 807   (unless (or noninteractive
 808               (and (memq window-system '(x w32))
 809                    (<= (frame-parameter nil 'menu-bar-lines) 0)))
 810     (menu-bar-mode 1))
 811
 812   ;; If frame was created with a tool bar, switch tool-bar-mode on.
 813   (unless (or noninteractive
 814               (not (display-graphic-p))
 815               (<= (frame-parameter nil 'tool-bar-lines) 0))
 816     (tool-bar-mode 1))
 817
 818   ;; Can't do this init in defcustom because window-system isn't set.
 819   (unless (or noninteractive
 820               (eq system-type 'ms-dos)
 821               (not (memq window-system '(x w32))))
 822     (setq-default blink-cursor t)
 823     (blink-cursor-mode 1))
 824
 825   (unless noninteractive
 826     ;; DOS/Windows systems have a PC-type keyboard which has both
 827     ;; <delete> and <backspace> keys.
 828     (when (or (memq system-type '(ms-dos windows-nt))
 829               (and (memq window-system '(x))
 830                    (fboundp 'x-backspace-delete-keys-p)
 831                    (x-backspace-delete-keys-p))
 832               ;; If the terminal Emacs is running on has erase char
 833               ;; set to ^H, use the Backspace key for deleting
 834               ;; backward and, and the Delete key for deleting forward.
 835               (and (null window-system)
 836                    (eq tty-erase-char 8)))
 837       (setq-default normal-erase-is-backspace t)
 838       (normal-erase-is-backspace-mode 1)))
 839
 840   (unless (or noninteractive
 841               (not (display-graphic-p))
 842               (not (fboundp 'x-show-tip)))
 843     (setq-default tooltip-mode t)
 844     (tooltip-mode 1))
 845
 846   ;; Register default TTY colors for the case the terminal hasn't a
 847   ;; terminal init file.
 848   (unless (memq window-system '(x w32))
 849     ;; We do this regardles of whether the terminal supports colors
 850     ;; or not, since they can switch that support on or off in
 851     ;; mid-session by setting the tty-color-mode frame parameter.
 852     (tty-register-default-colors))
 853
 854   ;; Record whether the tool-bar is present before the user and site
 855   ;; init files are processed.  frame-notice-user-settings uses this
 856   ;; to determine if the tool-bar has been disabled by the init files,
 857   ;; and the frame needs to be resized.
 858   (when (fboundp 'frame-notice-user-settings)
 859     (let ((tool-bar-lines (or (assq 'tool-bar-lines initial-frame-alist)
 860                               (assq 'tool-bar-lines default-frame-alist))))
 861       (setq tool-bar-originally-present
 862             (and tool-bar-lines
 863                  (cdr tool-bar-lines)
 864                  (not (eq 0 (cdr tool-bar-lines)))))))
 865
 866   (let ((old-scalable-fonts-allowed scalable-fonts-allowed)
 867         (old-font-list-limit font-list-limit)
 868         (old-face-ignored-fonts face-ignored-fonts))
 869
 870     (run-hooks 'before-init-hook)
 871
 872     ;; Run the site-start library if it exists.  The point of this file is
 873     ;; that it is run before .emacs.  There is no point in doing this after
 874     ;; .emacs; that is useless.
 875     (if site-run-file
 876         (load site-run-file t t))
 877
 878     ;; Sites should not disable this.  Only individuals should disable
 879     ;; the startup message.
 880     (setq inhibit-startup-message nil)
 881
 882     ;; Load that user's init file, or the default one, or none.
 883     (let (debug-on-error-from-init-file
 884           debug-on-error-should-be-set
 885           (debug-on-error-initial
 886            (if (eq init-file-debug t) 'startup init-file-debug))
 887           (orig-enable-multibyte default-enable-multibyte-characters))
 888       (let ((debug-on-error debug-on-error-initial)
 889             ;; This function actually reads the init files.
 890             (inner
 891              (function
 892               (lambda ()
 893                 (if init-file-user
 894                     (let ((user-init-file-1
 895                            (cond
 896                             ((eq system-type 'ms-dos)
 897                              (concat "~" init-file-user "/_emacs"))
 898                             ((eq system-type 'windows-nt)
 899                              (if (directory-files "~" nil "^\\.emacs\\(\\.elc?\\)?$")
 900                                  "~/.emacs"
 901                                "~/_emacs"))
 902                             ((eq system-type 'vax-vms)
 903                              "sys$login:.emacs")
 904                             (t
 905                              (concat "~" init-file-user "/.emacs")))))
 906                       ;; This tells `load' to store the file name found
 907                       ;; into user-init-file.
 908                       (setq user-init-file t)
 909                       (load user-init-file-1 t t)
 910
 911                       (when (eq user-init-file t)
 912                         ;; If we did not find ~/.emacs, try
 913                         ;; ~/.emacs.d/.emacs.
 914                         (let ((otherfile
 915                                (expand-file-name
 916                                 (file-name-nondirectory user-init-file-1)
 917                                 (file-name-as-directory
 918                                  (expand-file-name
 919                                   ".emacs.d"
 920                                   (file-name-directory user-init-file-1))))))
 921                           (load otherfile t t)
 922
 923                           ;; If we did not find the user's init file,
 924                           ;; set user-init-file conclusively.
 925                           ;; Don't let it be set from default.el.
 926                           (when (eq user-init-file t)
 927                             (setq user-init-file user-init-file-1))))
 928
 929                       ;; If we loaded a compiled file, set
 930                       ;; `user-init-file' to the source version if that
 931                       ;; exists.
 932                       (when (and user-init-file
 933                                  (equal (file-name-extension user-init-file)
 934                                         "elc"))
 935                         (let* ((source (file-name-sans-extension user-init-file))
 936                                (alt (concat source ".el")))
 937                           (setq source (cond ((file-exists-p alt) alt)
 938                                              ((file-exists-p source) source)
 939                                              (t nil)))
 940                           (when source
 941                             (when (file-newer-than-file-p source user-init-file)
 942                               (message "Warning: %s is newer than %s"
 943                                        source user-init-file)
 944                               (sit-for 1))
 945                             (setq user-init-file source))))
 946
 947                       (when (stringp custom-file)
 948                         (unless (assoc custom-file load-history)
 949                           ;; If the .emacs file has set `custom-file' but hasn't
 950                           ;; loaded the file yet, let's load it.
 951                           (load custom-file t t)))
 952
 953                       (unless inhibit-default-init
 954                         (let ((inhibit-startup-message nil))
 955                           ;; Users are supposed to be told their rights.
 956                           ;; (Plus how to get help and how to undo.)
 957                           ;; Don't you dare turn this off for anyone
 958                           ;; except yourself.
 959                           (load "default" t t)))))))))
 960         (if init-file-debug
 961             ;; Do this without a condition-case if the user wants to debug.
 962             (funcall inner)
 963           (condition-case error
 964               (progn
 965                 (funcall inner)
 966                 (setq init-file-had-error nil))
 967             (error
 968              (let ((message-log-max nil))
 969                (save-excursion
 970                  (set-buffer (get-buffer-create "*Messages*"))
 971                  (insert "\n\n"
 972                          (format "An error has occurred while loading `%s':\n\n"
 973                                  user-init-file)
 974                          (format "%s%s%s"
 975                                  (get (car error) 'error-message)
 976                                  (if (cdr error) ": " "")
 977                                  (mapconcat (lambda (s) (prin1-to-string s t)) (cdr error) ", "))
 978                          "\n\n"
 979                          "To ensure normal operation, you should investigate and remove the\n"
 980                          "cause of the error in your initialization file.  Start Emacs with\n"
 981                          "the `--debug-init' option to view a complete error backtrace.\n\n"))
 982                (message "Error in init file: %s%s%s"
 983                         (get (car error) 'error-message)
 984                         (if (cdr error) ": " "")
 985                         (mapconcat 'prin1-to-string (cdr error) ", "))
 986                (let ((pop-up-windows nil))
 987                  (pop-to-buffer "*Messages*"))
 988                (setq init-file-had-error t)))))
 989
 990         ;; If the user has a file of abbrevs, read it.
 991         (if (file-exists-p abbrev-file-name)
 992             (quietly-read-abbrev-file abbrev-file-name))
 993
 994         ;; If the abbrevs came entirely from the init file or the
 995         ;; abbrevs file, they do not need saving.
 996         (setq abbrevs-changed nil)
 997
 998         ;; If we can tell that the init file altered debug-on-error,
 999         ;; arrange to preserve the value that it set up.
1000         (or (eq debug-on-error debug-on-error-initial)
1001             (setq debug-on-error-should-be-set t
1002                   debug-on-error-from-init-file debug-on-error)))
1003       (if debug-on-error-should-be-set
1004           (setq debug-on-error debug-on-error-from-init-file))
1005       (unless (or default-enable-multibyte-characters
1006                   (eq orig-enable-multibyte default-enable-multibyte-characters))
1007         ;; Init file changed to unibyte.  Reset existing multibyte
1008         ;; buffers (probably *scratch*, *Messages*, *Minibuff-0*).
1009         ;; Arguably this should only be done if they're free of
1010         ;; multibyte characters.
1011         (mapcar (lambda (buffer)
1012                   (with-current-buffer buffer
1013                     (if enable-multibyte-characters
1014                         (set-buffer-multibyte nil))))
1015                 (buffer-list))
1016         ;; Also re-set the language environment in case it was
1017         ;; originally done before unibyte was set and is sensitive to
1018         ;; unibyte (display table, terminal coding system &c).
1019         (set-language-environment current-language-environment)))
1020
1021     ;; Do this here in case the init file sets mail-host-address.
1022     (if (equal user-mail-address "")
1023         (setq user-mail-address (concat (user-login-name) "@"
1024                                         (or mail-host-address
1025                                             (system-name)))))
1026
1027     ;; If parameter have been changed in the init file which influence
1028     ;; face realization, clear the face cache so that new faces will
1029     ;; be realized.
1030     (unless (and (eq scalable-fonts-allowed old-scalable-fonts-allowed)
1031                  (eq font-list-limit old-font-list-limit)
1032                  (eq face-ignored-fonts old-face-ignored-fonts))
1033       (clear-face-cache)))
1034
1035   (run-hooks 'after-init-hook)
1036
1037   ;; If *scratch* exists and init file didn't change its mode, initialize it.
1038   (if (get-buffer "*scratch*")
1039       (with-current-buffer "*scratch*"
1040         (if (eq major-mode 'fundamental-mode)
1041             (funcall initial-major-mode))))
1042
1043   ;; Load library for our terminal type.
1044   ;; User init file can set term-file-prefix to nil to prevent this.
1045   (unless (or noninteractive
1046               window-system
1047               (null term-file-prefix))
1048     (let ((term (getenv "TERM"))
1049           hyphend)
1050       (while (and term
1051                   (not (load (concat term-file-prefix term) t t)))
1052         ;; Strip off last hyphen and what follows, then try again
1053         (setq term
1054               (if (setq hyphend (string-match "[-_][^-_]+$" term))
1055                   (substring term 0 hyphend)
1056                 nil)))))
1057
1058   ;; Update the out-of-memory error message based on user's key bindings
1059   ;; for save-some-buffers.
1060   (setq memory-signal-data
1061         (list 'error
1062               (substitute-command-keys "Memory exhausted--use \\[save-some-buffers] then exit and restart Emacs")))
1063
1064   ;; Process the remaining args.
1065   (command-line-1 (cdr command-line-args))
1066
1067   ;; If -batch, terminate after processing the command options.
1068   (if noninteractive (kill-emacs t))
1069
1070   ;; Run emacs-session-restore (session management) if started by
1071   ;; the session manager and we have a session manager connection.
1072   (if (and (boundp 'x-session-previous-id)
1073            (stringp x-session-previous-id))
1074       (emacs-session-restore x-session-previous-id)))
1075
1076 (defcustom initial-scratch-message (purecopy "\
1077 ;; This buffer is for notes you don't want to save, and for Lisp evaluation.
1078 ;; If you want to create a file, visit that file with C-x C-f,
1079 ;; then enter the text in that file's own buffer.
1080
1081 ")
1082   "Initial message displayed in *scratch* buffer at startup.
1083 If this is nil, no message will be displayed."
1084   :type '(choice (text :tag "Message")
1085                  (const :tag "none" nil))
1086   :group 'initialization)
1087
1088 \f
1089 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
1090 ;;; Fancy splash screen
1091 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
1092
1093 (defvar fancy-splash-text
1094   '((:face variable-pitch
1095            "You can do basic editing with the menu bar and scroll bar \
1096 using the mouse.\n\n"
1097            :face (variable-pitch :weight bold)
1098            "Important Help menu items:\n"
1099            :face variable-pitch "\
1100 Emacs Tutorial\tLearn-by-doing tutorial for using Emacs efficiently
1101 Emacs FAQ\tFrequently asked questions and answers
1102 Read the Emacs Manual\tView the Emacs manual using Info
1103 \(Non)Warranty\tGNU Emacs comes with "
1104            :face (variable-pitch :slant oblique)
1105            "ABSOLUTELY NO WARRANTY\n"
1106            :face variable-pitch
1107            "\
1108 Copying Conditions\tConditions for redistributing and changing Emacs
1109 More Manuals / Ordering Manuals       Buying printed manuals from the FSF\n")
1110   (:face variable-pitch
1111            "You can do basic editing with the menu bar and scroll bar \
1112 using the mouse.\n\n"
1113            :face (variable-pitch :weight bold)
1114            "Useful File menu items:\n"
1115            :face variable-pitch "\
1116 Exit Emacs\t(Or type Control-x followed by Control-c)
1117 Recover Session\tRecover files you were editing before a crash
1118
1119
1120
1121
1122 "
1123            ))
1124   "A list of texts to show in the middle part of splash screens.
1125 Each element in the list should be a list of strings or pairs
1126 `:face FACE', like `fancy-splash-insert' accepts them.")
1127
1128
1129 (defgroup fancy-splash-screen ()
1130   "Fancy splash screen when Emacs starts."
1131   :version "21.1"
1132   :group 'initialization)
1133
1134
1135 (defcustom fancy-splash-delay 10
1136   "*Delay in seconds between splash screens."
1137   :group 'fancy-splash-screen
1138   :type 'integer)
1139
1140
1141 (defcustom fancy-splash-max-time 60
1142   "*Show splash screens for at most this number of seconds.
1143 Values less than 60 seconds are ignored."
1144   :group 'fancy-splash-screen
1145   :type 'integer)
1146
1147
1148 (defcustom fancy-splash-image nil
1149   "*The image to show in the splash screens, or nil for defaults."
1150   :group 'fancy-splash-screen
1151   :type '(choice (const :tag "Default" nil)
1152                  (file :tag "File")))
1153
1154
1155 ;; These are temporary storage areas for the splash screen display.
1156
1157 (defvar fancy-current-text nil)
1158 (defvar fancy-splash-help-echo nil)
1159 (defvar fancy-splash-stop-time nil)
1160 (defvar fancy-splash-outer-buffer nil)
1161
1162 (defun fancy-splash-insert (&rest args)
1163   "Insert text into the current buffer, with faces.
1164 Arguments from ARGS should be either strings or pairs `:face FACE',
1165 where FACE is a valid face specification, as it can be used with
1166 `put-text-properties'."
1167   (let ((current-face nil))
1168     (while args
1169       (if (eq (car args) :face)
1170           (setq args (cdr args) current-face (car args))
1171         (insert (propertize (car args)
1172                             'face current-face
1173                             'help-echo fancy-splash-help-echo)))
1174       (setq args (cdr args)))))
1175
1176
1177 (defun fancy-splash-head ()
1178   "Insert the head part of the splash screen into the current buffer."
1179   (let* ((image-file (cond ((stringp fancy-splash-image)
1180                             fancy-splash-image)
1181                            ((and (display-color-p)
1182                                  (image-type-available-p 'xpm))
1183                             (if (and (fboundp 'x-display-planes)
1184                                      (= (funcall 'x-display-planes) 8))
1185                                 "splash8.xpm"
1186                               "splash.xpm"))
1187                            (t "splash.pbm")))
1188          (img (create-image image-file))
1189          (image-width (and img (car (image-size img))))
1190          (window-width (window-width (selected-window))))
1191     (when img
1192       (when (> window-width image-width)
1193         ;; Center the image in the window.
1194         (let ((pos (/ (- window-width image-width) 2)))
1195           (insert (propertize " " 'display `(space :align-to ,pos))))
1196
1197         ;; Change the color of the XPM version of the splash image
1198         ;; so that it is visible with a dark frame background.
1199         (when (and (memq 'xpm img)
1200                    (eq (frame-parameter nil 'background-mode) 'dark))
1201           (setq img (append img '(:color-symbols (("#000000" . "gray30"))))))
1202
1203         ;; Insert the image with a help-echo and a keymap.
1204         (let ((map (make-sparse-keymap))
1205               (help-echo "mouse-2: browse http://www.gnu.org/"))
1206           (define-key map [mouse-2]
1207             (lambda ()
1208               (interactive)
1209               (browse-url "http://www.gnu.org/")
1210               (throw 'exit nil)))
1211           (define-key map [down-mouse-2] 'ignore)
1212           (define-key map [up-mouse-2] 'ignore)
1213           (insert-image img (propertize "xxx" 'help-echo help-echo
1214                                         'keymap map)))
1215         (insert "\n"))))
1216   (fancy-splash-insert
1217    :face '(variable-pitch :foreground "red")
1218    (if (eq system-type 'gnu/linux)
1219        "GNU Emacs is one component of the GNU/Linux operating system."
1220      "GNU Emacs is one component of the GNU operating system."))
1221   (insert "\n")
1222   (unless (equal (buffer-name fancy-splash-outer-buffer) "*scratch*")
1223     (fancy-splash-insert :face 'variable-pitch
1224                          (substitute-command-keys
1225                           "Type \\[recenter] to begin editing your file.\n"))))
1226
1227
1228 (defun fancy-splash-tail ()
1229   "Insert the tail part of the splash screen into the current buffer."
1230   (let ((fg (if (eq (frame-parameter nil 'background-mode) 'dark)
1231                 "cyan" "darkblue")))
1232     (fancy-splash-insert :face `(variable-pitch :foreground ,fg)
1233                          "\nThis is "
1234                          (emacs-version)
1235                          "\n"
1236                          :face '(variable-pitch :height 0.5)
1237                          "Copyright (C) 2002 Free Software Foundation, Inc.")
1238     (and auto-save-list-file-prefix
1239          ;; Don't signal an error if the
1240          ;; directory for auto-save-list files
1241          ;; does not yet exist.
1242          (file-directory-p (file-name-directory
1243                             auto-save-list-file-prefix))
1244          (directory-files
1245           (file-name-directory auto-save-list-file-prefix)
1246           nil
1247           (concat "\\`"
1248                   (regexp-quote (file-name-nondirectory
1249                                  auto-save-list-file-prefix)))
1250           t)
1251          (fancy-splash-insert :face '(variable-pitch :foreground "red")
1252                               "\n\nIf an Emacs session crashed recently, "
1253                               "type M-x recover-session RET\nto recover"
1254                               " the files you were editing."))))
1255
1256 (defun fancy-splash-screens-1 (buffer)
1257   "Timer function displaying a splash screen."
1258   (when (> (float-time) fancy-splash-stop-time)
1259     (throw 'stop-splashing nil))
1260   (unless fancy-current-text
1261     (setq fancy-current-text fancy-splash-text))
1262   (let ((text (car fancy-current-text)))
1263     (set-buffer buffer)
1264     (erase-buffer)
1265     (fancy-splash-head)
1266     (apply #'fancy-splash-insert text)
1267     (fancy-splash-tail)
1268     (unless (current-message)
1269       (message fancy-splash-help-echo))
1270     (set-buffer-modified-p nil)
1271     (goto-char (point-min))
1272     (force-mode-line-update)
1273     (setq fancy-current-text (cdr fancy-current-text))))
1274
1275
1276 (defun fancy-splash-default-action ()
1277   "Default action for events in the splash screen buffer."
1278   (interactive)
1279   (push last-command-event unread-command-events)
1280   (throw 'exit nil))
1281
1282
1283 (defun fancy-splash-screens ()
1284   "Display fancy splash screens when Emacs starts."
1285   (setq fancy-splash-help-echo (startup-echo-area-message))
1286   (let ((old-hourglass display-hourglass)
1287         (fancy-splash-outer-buffer (current-buffer))
1288         splash-buffer
1289         (old-minor-mode-map-alist minor-mode-map-alist)
1290         (frame (fancy-splash-frame))
1291         timer)
1292     (save-selected-window
1293       (select-frame frame)
1294       (switch-to-buffer "GNU Emacs")
1295       (setq tab-width 20)
1296       (setq splash-buffer (current-buffer))
1297       (catch 'stop-splashing
1298         (unwind-protect
1299             (let ((map (make-sparse-keymap)))
1300               (use-local-map map)
1301               (define-key map [switch-frame] 'ignore)
1302               (define-key map [t] 'fancy-splash-default-action)
1303               (define-key map [mouse-movement] 'ignore)
1304               (define-key map [mode-line t] 'ignore)
1305               (setq cursor-type nil
1306                     display-hourglass nil
1307                     minor-mode-map-alist nil
1308                     buffer-undo-list t
1309                     mode-line-format (propertize "---- %b %-"
1310                                                  'face '(:weight bold))
1311                     fancy-splash-stop-time (+ (float-time)
1312                                               (max 60 fancy-splash-max-time))
1313                     timer (run-with-timer 0 fancy-splash-delay
1314                                           #'fancy-splash-screens-1
1315                                           splash-buffer))
1316               (recursive-edit))
1317           (cancel-timer timer)
1318           (setq display-hourglass old-hourglass
1319                 minor-mode-map-alist old-minor-mode-map-alist)
1320           (kill-buffer splash-buffer))))))
1321
1322 (defun fancy-splash-frame ()
1323   "Return the frame to use for the fancy splash screen.
1324 Returning non-nil does not mean we should necessarily
1325 use the fancy splash screen, but if we do use it,
1326 we put it on this frame."
1327   (let (chosen-frame)
1328     (dolist (frame (append (frame-list) (list (selected-frame))))
1329       (if (and (frame-visible-p frame)
1330                (not (window-minibuffer-p (frame-selected-window frame))))
1331           (setq chosen-frame frame)))
1332     chosen-frame))
1333
1334 (defun use-fancy-splash-screens-p ()
1335   "Return t if fancy splash screens should be used."
1336   (when (or (and (display-color-p)
1337                  (image-type-available-p 'xpm))
1338             (image-type-available-p 'pbm))
1339     (let ((frame (fancy-splash-frame)))
1340       (when frame
1341         (let* ((img (create-image (or fancy-splash-image
1342                                       (if (and (display-color-p)
1343                                                (image-type-available-p 'xpm))
1344                                           "splash.xpm" "splash.pbm"))))
1345                (image-height (and img (cdr (image-size img))))
1346                (window-height (1- (window-height (frame-selected-window frame)))))
1347           (> window-height (+ image-height 19)))))))
1348
1349
1350 (defun normal-splash-screen ()
1351   "Display splash screen when Emacs starts."
1352   (let ((prev-buffer (current-buffer)))
1353     (unwind-protect
1354         (with-current-buffer (get-buffer-create "GNU Emacs")
1355           (let ((tab-width 8)
1356                 (mode-line-format (propertize "---- %b %-"
1357                                               'face '(:weight bold))))
1358
1359             ;; The convention for this piece of code is that
1360             ;; each piece of output starts with one or two newlines
1361             ;; and does not end with any newlines.
1362             (insert "Welcome to GNU Emacs")
1363             (insert
1364              (if (eq system-type 'gnu/linux)
1365                  ", one component of the GNU/Linux operating system.\n"
1366                ", a part of the GNU operating system.\n"))
1367
1368             (unless (equal (buffer-name prev-buffer) "*scratch*")
1369               (insert (substitute-command-keys
1370                        "\nType \\[recenter] to begin editing your file.\n")))
1371
1372             (if (display-mouse-p)
1373                 ;; The user can use the mouse to activate menus
1374                 ;; so give help in terms of menu items.
1375                 (progn
1376                   (insert "\
1377 You can do basic editing with the menu bar and scroll bar using the mouse.
1378
1379 Useful File menu items:
1380 Exit Emacs              (or type Control-x followed by Control-c)
1381 Recover Session         recover files you were editing before a crash
1382
1383 Important Help menu items:
1384 Emacs Tutorial          Learn-by-doing tutorial for using Emacs efficiently.
1385 Emacs FAQ               Frequently asked questions and answers
1386 Read the Emacs Manual   View the Emacs manual using Info
1387 \(Non)Warranty          GNU Emacs comes with ABSOLUTELY NO WARRANTY
1388 Copying Conditions      Conditions for redistributing and changing Emacs.
1389 Getting New Versions    How to obtain the latest version of Emacs.
1390 More Manuals / Ordering Manuals    How to order printed manuals from the FSF.
1391 ")
1392                   (insert "\n\n" (emacs-version)
1393                           "
1394 Copyright (C) 2002 Free Software Foundation, Inc."))
1395
1396               ;; No mouse menus, so give help using kbd commands.
1397
1398               ;; If keys have their default meanings,
1399               ;; use precomputed string to save lots of time.
1400               (if (and (eq (key-binding "\C-h") 'help-command)
1401                        (eq (key-binding "\C-xu") 'advertised-undo)
1402                        (eq (key-binding "\C-x\C-c") 'save-buffers-kill-emacs)
1403                        (eq (key-binding "\C-ht") 'help-with-tutorial)
1404                        (eq (key-binding "\C-hi") 'info)
1405                        (eq (key-binding "\C-hr") 'info-emacs-manual)
1406                        (eq (key-binding "\C-h\C-n") 'view-emacs-news))
1407                   (insert "
1408 Get help           C-h  (Hold down CTRL and press h)
1409 Emacs manual       C-h r
1410 Emacs tutorial     C-h t           Undo changes     C-x u
1411 Buy manuals        C-h C-m         Exit Emacs       C-x C-c
1412 Browse manuals     C-h i")
1413
1414                 (insert (substitute-command-keys
1415                          (format "\n
1416 Get help           %s
1417 Emacs manual       \\[info-emacs-manual]
1418 Emacs tutorial     \\[help-with-tutorial]\tUndo changes\t\\[advertised-undo]
1419 Buy manuals        \\[view-order-manuals]\tExit Emacs\t\\[save-buffers-kill-emacs]
1420 Browse manuals     \\[info]"
1421                                  (let ((where (where-is-internal
1422                                                'help-command nil t)))
1423                                    (if where
1424                                        (key-description where)
1425                                      "M-x help"))))))
1426
1427               ;; Say how to use the menu bar with the keyboard.
1428               (if (and (eq (key-binding "\M-`") 'tmm-menubar)
1429                        (eq (key-binding [f10]) 'tmm-menubar))
1430                   (insert "
1431 Activate menubar   F10  or  ESC `  or   M-`")
1432                 (insert (substitute-command-keys "
1433 Activate menubar     \\[tmm-menubar]")))
1434
1435               ;; Many users seem to have problems with these.
1436               (insert "
1437 \(`C-' means use the CTRL key.  `M-' means use the Meta (or Alt) key.
1438 If you have no Meta key, you may instead type ESC followed by the character.)")
1439
1440               (insert "\n\n" (emacs-version)
1441                       "
1442 Copyright (C) 2002 Free Software Foundation, Inc.")
1443
1444               (if (and (eq (key-binding "\C-h\C-c") 'describe-copying)
1445                        (eq (key-binding "\C-h\C-d") 'describe-distribution)
1446                        (eq (key-binding "\C-h\C-w") 'describe-no-warranty))
1447                   (insert
1448                    "\n
1449 GNU Emacs comes with ABSOLUTELY NO WARRANTY; type C-h C-w for full details.
1450 Emacs is Free Software--Free as in Freedom--so you can redistribute copies
1451 of Emacs and modify it; type C-h C-c to see the conditions.
1452 Type C-h C-d for information on getting the latest version.")
1453                 (insert (substitute-command-keys
1454                          "\n
1455 GNU Emacs comes with ABSOLUTELY NO WARRANTY; type \\[describe-no-warranty] for full details.
1456 Emacs is Free Software--Free as in Freedom--so you can redistribute copies
1457 of Emacs and modify it; type \\[describe-copying] to see the conditions.
1458 Type \\[describe-distribution] for information on getting the latest version."))))
1459
1460             ;; The rest of the startup screen is the same on all
1461             ;; kinds of terminals.
1462
1463             ;; Give information on recovering, if there was a crash.
1464             (and auto-save-list-file-prefix
1465                  ;; Don't signal an error if the
1466                  ;; directory for auto-save-list files
1467                  ;; does not yet exist.
1468                  (file-directory-p (file-name-directory
1469                                     auto-save-list-file-prefix))
1470                  (directory-files
1471                   (file-name-directory auto-save-list-file-prefix)
1472                   nil
1473                   (concat "\\`"
1474                           (regexp-quote (file-name-nondirectory
1475                                          auto-save-list-file-prefix)))
1476                   t)
1477                  (insert "\n\nIf an Emacs session crashed recently, "
1478                          "type M-x recover-session RET\nto recover"
1479                          " the files you were editing."))
1480
1481             ;; Display the input that we set up in the buffer.
1482             (set-buffer-modified-p nil)
1483             (goto-char (point-min))
1484             (save-window-excursion
1485               (switch-to-buffer (current-buffer))
1486               (sit-for 120))))
1487       ;; Unwind ... ensure splash buffer is killed
1488       (kill-buffer "GNU Emacs"))))
1489
1490
1491 (defun startup-echo-area-message ()
1492   (if (eq (key-binding "\C-h\C-p") 'describe-project)
1493       "For information about the GNU Project and its goals, type C-h C-p."
1494     (substitute-command-keys
1495      "For information about the GNU Project and its goals, type \
1496 \\[describe-project].")))
1497
1498
1499 (defun display-startup-echo-area-message ()
1500   (let ((resize-mini-windows t))
1501     (message (startup-echo-area-message))))
1502
1503
1504 (defun display-splash-screen ()
1505   "Display splash screen according to display.
1506 Fancy splash screens are used on graphic displays,
1507 normal otherwise."
1508   (interactive)
1509   (if (and (display-graphic-p)
1510            (use-fancy-splash-screens-p))
1511       (fancy-splash-screens)
1512     (normal-splash-screen)))
1513
1514
1515 (defun command-line-1 (command-line-args-left)
1516   (or noninteractive (input-pending-p) init-file-had-error
1517       ;; t if the init file says to inhibit the echo area startup message.
1518       (and inhibit-startup-echo-area-message
1519            user-init-file
1520            (or (and (get 'inhibit-startup-echo-area-message 'saved-value)
1521                     (equal inhibit-startup-echo-area-message
1522                            (if (equal init-file-user "")
1523                                (user-login-name)
1524                              init-file-user)))
1525                ;; Wasn't set with custom; see if .emacs has a setq.
1526                (let ((buffer (get-buffer-create " *temp*")))
1527                  (prog1
1528                      (condition-case nil
1529                          (save-excursion
1530                            (set-buffer buffer)
1531                            (insert-file-contents user-init-file)
1532                            (re-search-forward
1533                             (concat
1534                              "([ \t\n]*setq[ \t\n]+"
1535                              "inhibit-startup-echo-area-message[ \t\n]+"
1536                              (regexp-quote
1537                               (prin1-to-string
1538                                (if (equal init-file-user "")
1539                                    (user-login-name)
1540                                  init-file-user)))
1541                              "[ \t\n]*)")
1542                             nil t))
1543                        (error nil))
1544                    (kill-buffer buffer)))))
1545       (display-startup-echo-area-message))
1546
1547   ;; Delay 2 seconds after an init file error message
1548   ;; was displayed, so user can read it.
1549   (when init-file-had-error
1550     (sit-for 2))
1551
1552   (when command-line-args-left
1553     ;; We have command args; process them.
1554     (let ((dir command-line-default-directory)
1555           (file-count 0)
1556           first-file-buffer
1557           tem
1558           ;; The directories listed in --directory/-L options will *appear*
1559           ;; at the front of `load-path' in the order they appear on the
1560           ;; command-line.  We cannot do this by *placing* them at the front
1561           ;; in the order they appear, so we need this variable to hold them,
1562           ;; temporarily.
1563           extra-load-path
1564           just-files ;; t if this follows the magic -- option.
1565           ;; This includes our standard options' long versions
1566           ;; and long versions of what's on command-switch-alist.
1567           (longopts
1568            (append '(("--funcall") ("--load") ("--insert") ("--kill")
1569                      ("--directory") ("--eval") ("--execute") ("--no-splash")
1570                      ("--find-file") ("--visit") ("--file"))
1571                    (mapcar (lambda (elt)
1572                              (list (concat "-" (car elt))))
1573                            command-switch-alist)))
1574           (line 0)
1575           (column 0))
1576
1577       ;; Add the long X options to longopts.
1578       (dolist (tem command-line-x-option-alist)
1579         (if (string-match "^--" (car tem))
1580             (push (list (car tem)) longopts)))
1581
1582       ;; Loop, processing options.
1583       (while command-line-args-left
1584         (let* ((argi (car command-line-args-left))
1585                (orig-argi argi)
1586                argval completion)
1587           (setq command-line-args-left (cdr command-line-args-left))
1588
1589           ;; Do preliminary decoding of the option.
1590           (if just-files
1591               ;; After --, don't look for options; treat all args as files.
1592               (setq argi "")
1593             ;; Convert long options to ordinary options
1594             ;; and separate out an attached option argument into argval.
1595             (when (string-match "^\\(--[^=]*\\)=" argi)
1596               (setq argval (substring argi (match-end 0))
1597                     argi (match-string 1 argi)))
1598             (if (equal argi "--")
1599                 (setq completion nil)
1600               (setq completion (try-completion argi longopts)))
1601             (if (eq completion t)
1602                 (setq argi (substring argi 1))
1603               (if (stringp completion)
1604                   (let ((elt (assoc completion longopts)))
1605                     (or elt
1606                         (error "Option `%s' is ambiguous" argi))
1607                     (setq argi (substring (car elt) 1)))
1608                 (setq argval nil
1609                       argi orig-argi))))
1610
1611           ;; Execute the option.
1612           (cond ((setq tem (assoc argi command-switch-alist))
1613                  (if argval
1614                      (let ((command-line-args-left
1615                             (cons argval command-line-args-left)))
1616                        (funcall (cdr tem) argi))
1617                    (funcall (cdr tem) argi)))
1618
1619                 ((equal argi "-no-splash")
1620                  (setq inhibit-startup-message t))
1621
1622                 ((member argi '("-f"    ; what the manual claims
1623                                 "-funcall"
1624                                 "-e"))  ; what the source used to say
1625                  (setq tem (intern (or argval (pop command-line-args-left))))
1626                  (if (arrayp (symbol-function tem))
1627                      (command-execute tem)
1628                    (funcall tem)))
1629
1630                 ((member argi '("-eval" "-execute"))
1631                  (eval (read (or argval (pop command-line-args-left)))))
1632                 ;; Set the default directory as specified in -L.
1633
1634                 ((member argi '("-L" "-directory"))
1635                  (setq tem (or argval (pop command-line-args-left)))
1636                  ;; We will reverse `extra-load-path' and prepend it to
1637                  ;; `load-path' after all the arguments have been processed.
1638                  (push
1639                   (expand-file-name (command-line-normalize-file-name tem))
1640                   extra-load-path))
1641
1642                 ((member argi '("-l" "-load"))
1643                  (let* ((file (command-line-normalize-file-name
1644                                (or argval (pop command-line-args-left))))
1645                         ;; Take file from default dir if it exists there;
1646                         ;; otherwise let `load' search for it.
1647                         (file-ex (expand-file-name file)))
1648                    (when (file-exists-p file-ex)
1649                      (setq file file-ex))
1650                    (load file nil t)))
1651
1652                 ((equal argi "-insert")
1653                  (setq tem (or argval (pop command-line-args-left)))
1654                  (or (stringp tem)
1655                      (error "File name omitted from `-insert' option"))
1656                  (insert-file-contents (command-line-normalize-file-name tem)))
1657
1658                 ((equal argi "-kill")
1659                  (kill-emacs t))
1660
1661                 ((string-match "^\\+[0-9]+\\'" argi)
1662                  (setq line (string-to-int argi)))
1663
1664                 ((string-match "^\\+\\([0-9]+\\):\\([0-9]+\\)\\'" argi)
1665                  (setq line (string-to-int (match-string 1 argi))
1666                        column (string-to-int (match-string 2 argi))))
1667
1668                 ((setq tem (assoc argi command-line-x-option-alist))
1669                  ;; Ignore X-windows options and their args if not using X.
1670                  (setq command-line-args-left
1671                        (nthcdr (nth 1 tem) command-line-args-left)))
1672
1673                 ((member argi '("-find-file" "-file" "-visit"))
1674                  ;; An explicit option to specify visiting a file.
1675                  (setq tem (or argval (pop command-line-args-left)))
1676                  (unless (stringp tem)
1677                    (error "File name omitted from `%s' option" argi))
1678                  (setq file-count (1+ file-count))
1679                  (let ((file (expand-file-name
1680                               (command-line-normalize-file-name tem) dir)))
1681                    (if (= file-count 1)
1682                        (setq first-file-buffer (find-file file))
1683                      (find-file-other-window file)))
1684                  (or (zerop line)
1685                      (goto-line line))
1686                  (setq line 0)
1687                  (unless (< column 1)
1688                    (move-to-column (1- column)))
1689                  (setq column 0))
1690
1691                 ((equal argi "--")
1692                  (setq just-files t))
1693                 (t
1694                  ;; We have almost exhausted our options. See if the
1695                  ;; user has made any other command-line options available
1696                  (let ((hooks command-line-functions) ;; lrs 7/31/89
1697                        (did-hook nil))
1698                    (while (and hooks
1699                                (not (setq did-hook (funcall (car hooks)))))
1700                      (setq hooks (cdr hooks)))
1701                    (if (not did-hook)
1702                        ;; Presume that the argument is a file name.
1703                        (progn
1704                          (if (string-match "\\`-" argi)
1705                              (error "Unknown option `%s'" argi))
1706                          (setq file-count (1+ file-count))
1707                          (let ((file
1708                                 (expand-file-name
1709                                  (command-line-normalize-file-name orig-argi)
1710                                  dir)))
1711                            (if (= file-count 1)
1712                                (setq first-file-buffer (find-file file))
1713                              (find-file-other-window file)))
1714                          (or (zerop line)
1715                              (goto-line line))
1716                          (setq line 0)
1717                          (unless (< column 1)
1718                            (move-to-column (1- column)))
1719                          (setq column 0))))))))
1720
1721       ;; See --directory/-L option above.
1722       (when extra-load-path
1723         (setq load-path (append (nreverse extra-load-path) load-path)))
1724
1725       ;; If 3 or more files visited, and not all visible,
1726       ;; show user what they all are.  But leave the last one current.
1727       (and (> file-count 2)
1728            (not noninteractive)
1729            (not inhibit-startup-buffer-menu)
1730            (or (get-buffer-window first-file-buffer)
1731                (list-buffers)))))
1732
1733   ;; Maybe display a startup screen.
1734   (when (and (not inhibit-startup-message) (not noninteractive)
1735              ;; Don't display startup screen if init file
1736              ;; has started some sort of server.
1737              (not (and (fboundp 'process-list)
1738                        (process-list))))
1739     ;; Display a startup screen, after some preparations.
1740
1741     ;; If there are no switches to process, we might as well
1742     ;; run this hook now, and there may be some need to do it
1743     ;; before doing any output.
1744     (run-hooks 'emacs-startup-hook)
1745     (and term-setup-hook
1746          (run-hooks 'term-setup-hook))
1747     (setq inhibit-startup-hooks t)
1748
1749     ;; It's important to notice the user settings before we
1750     ;; display the startup message; otherwise, the settings
1751     ;; won't take effect until the user gives the first
1752     ;; keystroke, and that's distracting.
1753     (when (fboundp 'frame-notice-user-settings)
1754       (frame-notice-user-settings))
1755
1756     ;; If there are no switches to process, we might as well
1757     ;; run this hook now, and there may be some need to do it
1758     ;; before doing any output.
1759     (when window-setup-hook
1760       (run-hooks 'window-setup-hook)
1761       ;; Don't let the hook be run twice.
1762       (setq window-setup-hook nil))
1763
1764     ;; Do this now to avoid an annoying delay if the user
1765     ;; clicks the menu bar during the sit-for.
1766     (when (display-popup-menus-p)
1767       (precompute-menubar-bindings))
1768     (setq menubar-bindings-done t)
1769
1770     ;; If *scratch* is selected and it is empty, insert an
1771     ;; initial message saying not to create a file there.
1772     (when (and initial-scratch-message
1773                (equal (buffer-name) "*scratch*")
1774                (= 0 (buffer-size)))
1775       (insert initial-scratch-message)
1776       (set-buffer-modified-p nil))
1777
1778     ;; If user typed input during all that work,
1779     ;; abort the startup screen.  Otherwise, display it now.
1780     (unless (input-pending-p)
1781       (display-splash-screen))))
1782
1783
1784 (defun command-line-normalize-file-name (file)
1785   "Collapse multiple slashes to one, to handle non-Emacs file names."
1786   (save-match-data
1787     ;; Use arg 1 so that we don't collapse // at the start of the file name.
1788     ;; That is significant on some systems.
1789     ;; However, /// at the beginning is supposed to mean just /, not //.
1790     (if (string-match "^///+" file)
1791         (setq file (replace-match "/" t t file)))
1792     (while (string-match "//+" file 1)
1793       (setq file (replace-match "/" t t file)))
1794     file))
1795
1796 ;;; startup.el ends here