src/code/common-os.lisp

   1 ;;;; OS interface functions for SBCL common to all target OSes
   2
   3 ;;;; This software is part of the SBCL system. See the README file for
   4 ;;;; more information.
   5 ;;;;
   6 ;;;; This software is derived from the CMU CL system, which was
   7 ;;;; written at Carnegie Mellon University and released into the
   8 ;;;; public domain. The software is in the public domain and is
   9 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
  10 ;;;; files for more information.
  11
  12 (in-package "SB!SYS")
  13
  14 (sb!alien:define-alien-variable ("posix_argv" *native-posix-argv*) (* (* char)))
  15 (sb!alien:define-alien-variable ("core_string" *native-core-string*) (* char))
  16 (sb!alien:define-alien-routine
  17  os-get-runtime-executable-path sb!alien:c-string (external-path boolean))
  18 (sb!alien:define-alien-variable
  19  ("saved_runtime_path" *native-saved-runtime-path*) (* char))
  20
  21 (defmacro init-var-ignoring-errors (variable
  22                                     form
  23                                     &key default
  24                                          explanation
  25                                          (condition 'error))
  26   `(setf ,variable
  27          (handler-case ,form
  28            (,condition (c)
  29              (let ((default ,default))
  30                (warn "Error initializing ~a~@[ ~a~]:~@
  31              ~a
  32              ~% Using ~s instead."
  33                      ',variable
  34                      ,explanation
  35                      c
  36                      default)
  37                default)))))
  38
  39 ;;; If something ever needs to be done differently for one OS, then
  40 ;;; split out the different part into per-os functions.
  41
  42 (defun os-deinit ()
  43   (setf *default-pathname-defaults* (make-trivial-default-pathname)
  44         *core-string* ""
  45         *software-version* nil
  46         *runtime-pathname* nil
  47         *core-pathname* nil
  48         *posix-argv* nil)
  49   (sb!impl::%makunbound '*machine-version*))
  50
  51 (defun os-cold-init-or-reinit ()
  52   (/show0 "entering OS-COLD-INIT-OR-REINIT")
  53   (/show0 "setting *CORE-STRING*")
  54   (init-var-ignoring-errors
  55    *core-string*
  56    (sb!alien:cast *native-core-string* sb!alien:c-string)
  57    :default "")
  58   (/show0 "setting *POSIX-ARGV*")
  59   (init-var-ignoring-errors
  60    *posix-argv*
  61    (loop for i from 0
  62          for arg = (sb!alien:deref *native-posix-argv* i)
  63          until (sb!alien:null-alien arg)
  64          collect (sb!alien:cast arg sb!alien:c-string)))
  65   (/show0 "setting *DEFAULT-PATHNAME-DEFAULTS*")
  66   ;; Temporary value, so that #'PARSE-NATIVE-NAMESTRING won't blow up
  67   ;; when we call it below.
  68   (setf *default-pathname-defaults* (make-trivial-default-pathname))
  69   (init-var-ignoring-errors
  70    *default-pathname-defaults*
  71    (parse-native-namestring (sb!unix:posix-getcwd/))
  72    :default *default-pathname-defaults*
  73    :explanation "with the current directory")
  74   (/show0 "setting *CORE-PATHNAME*")
  75   (setf *core-pathname* (merge-pathnames (native-pathname *core-string*)))
  76   (/show0 "setting *RUNTIME-PATHNAME*")
  77   (init-var-ignoring-errors
  78    *runtime-pathname*
  79    (let ((exe (os-get-runtime-executable-path t))
  80          (saved (sb!alien:cast *native-saved-runtime-path* sb!alien:c-string)))
  81      (when (or exe saved) (native-pathname (or exe saved)))))
  82   (/show0 "leaving OS-COLD-INIT-OR-REINIT"))