r7814: add implementation-dependent file, new impl-dependent commands

[kmrcl.git] / io.lisp

diff --git a/io.lisp b/io.lisp
index c444e0f903b92531170d06ecf93990af090ea0df..4dea295f5e789d6dacb1c2eb86fe99c155d71487 100644 (file)
--- a/io.lisp
+++ b/io.lisp
@@ -7,7 +7,7 @@
 ;;;; Programmer:    Kevin M. Rosenberg
 ;;;; Date Started:  Apr 2000
 ;;;;
-;;;; $Id: io.lisp,v 1.10 2003/06/20 08:50:38 kevin Exp $
+;;;; $Id$
 ;;;;
 ;;;; This file, part of KMRCL, is Copyright (c) 2002 by Kevin M. Rosenberg
 ;;;;
@@ -169,3 +169,46 @@
   #-allegro (write-string (write-to-string n) s))
 
 
+
+#+openmcl
+(defun open-device-stream (path direction)
+  (let* ((mode (ecase direction
+                (:input #.(read-from-string "#$O_RDONLY"))
+                (:output #.(read-from-string "#$O_WRONLY"))
+                (:io #.(read-from-string "#$O_RDWR"))))
+        (fd (ccl::fd-open (ccl::native-translated-namestring path) mode)))
+    (if (< fd 0)
+       (ccl::signal-file-error fd path)
+       (ccl::make-fd-stream fd :direction direction))))
+
+
+(defun null-output-stream ()
+  #-openmcl
+  (when (probe-file #p"/dev/null")
+    (open #p"/dev/null" :direction :output :if-exists :overwrite))
+  #+openmcl
+  (when (probe-file #p"/dev/null")
+    (open-device-stream #p"/dev/null" :output))  
+  )
+
+
+(defun directory-tree (filename)
+  "Returns a tree of pathnames for sub-directories of a directory"
+  (let* ((root (canonicalize-directory-name filename))
+        (subdirs (loop for path in (directory
+                                    (make-pathname :name :wild
+                                                   :type :wild
+                                                   :defaults root))
+                       when (probe-directory path)
+                       collect (canonicalize-directory-name path))))
+    (when (find nil subdirs)
+      (error "~A" subdirs))
+    (when (null root)
+      (error "~A" root))
+    (if subdirs
+       (cons root (mapcar #'directory-tree subdirs))
+       (if (probe-directory root)
+           (list root)
+           (error "root not directory ~A" root)))))
+
+