;;; -*-lisp-*-
;;;
;;; $Id$
;;;
;;; Basic system-specific stuff
;;;
;;; (c) 2005 Mark Wooding
;;;

;;;----- Licensing notice ---------------------------------------------------
;;;
;;; This program is free software; you can redistribute it and/or modify
;;; it under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 2 of the License, or
;;; (at your option) any later version.
;;;
;;; This program is distributed in the hope that it will be useful,
;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with this program; if not, write to the Free Software Foundation,
;;; Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

(defpackage #:runlisp
  (:use #:common-lisp)
  (:export #:*raw-command-line* #:*command-line* #:exit)
  #+clisp (:import-from #:ext #:exit))

(defpackage #:mdw.sys-base
  (:use #:common-lisp #:runlisp)
  (:export #:exit #:hard-exit #:*program-name* #:*command-line*
	   set-command-line-arguments)
  (:import-from #:runlisp #:*raw-command-line* #:*command-line* #:exit))
(in-package #:mdw.sys-base)

(defvar *raw-command-line*)
(defvar *command-line*)
(defvar *program-name*)

(defun set-command-line-arguments ()
  (setf *raw-command-line*
	(or #+cl-launch cl-launch:*arguments*
	    #+cmu ext:*command-line-strings*
	    #+sbcl sb-ext:*posix-argv*
	    #+ecl (loop from i below (ext:argc) collect (ext:argv i))
	    #+clisp (coerce (ext:argv) 'list)
	    '("<unknown-lisp>" "--" "<unknown-script>")))
  (setf *command-line*
	(or #+cl-launch (cons (or (cl-launch:getenv "CL_LAUNCH_FILE")
				  "<unknown-script>")
			      cl-launch:*arguments*)
	    (cdr (member "--" *raw-command-line* :test #'string=))
	    *raw-command-line*))
  (setf *program-name* (pathname-name (car *command-line*))))
(set-command-line-arguments)

#-clisp
(unless (fboundp 'exit)
  (defun exit (&optional (code 0))
    "Polite way to end a program."
    #+(or cmu ecl) (ext:quit code)
    #+sbcl (sb-ext:quit :unix-status code)
    #-(or cmu ecl sbcl)
    (progn
      (unless (zerop code)
	(format t "~&Exiting unsuccessfully with code ~D.~%" code))
      (abort))))

(defun hard-exit (&optional (code 0))
  "Stops the program immediately in its tracks.  Does nothing else.  Use
   after fork, for example, to avoid flushing buffers."
  (declare (type (unsigned-byte 32) code))
  #+cmu (unix::void-syscall ("_exit" c-call:int) code)
  #+sbcl (sb-ext:quit :unix-status code :recklessly-p t)
  #+(or clisp ecl) (ext:quit code))

;;;----- That's all, folks --------------------------------------------------