X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcode%2Fmisc-aliens.lisp;h=bf11807f072f5f706eb87dcd6e42204a0b74f1b7;hb=9c3a9502bc872f024c365412d991ef43fd866e4c;hp=bcebb222b3fd9f2eb244d82a356b29ba88104869;hpb=0b3ec4b1d978b887db175b7b3bada8e727683e15;p=sbcl.git

diff --git a/src/code/misc-aliens.lisp b/src/code/misc-aliens.lisp
index bcebb22..bf11807 100644
--- a/src/code/misc-aliens.lisp
+++ b/src/code/misc-aliens.lisp
@@ -12,7 +12,15 @@
 (in-package "SB!IMPL")
 
 (declaim (inline memmove))
-(def-alien-routine ("memmove" memmove) void
+(define-alien-routine ("memmove" memmove) void
   (dest (* char))
   (src (* char))
   (n unsigned-int))
+
+(define-alien-routine ("os_get_errno" get-errno) integer)
+(setf (fdocumentation 'get-errno 'function)
+      "Return the value of the C library pseudo-variable named \"errno\".")
+
+;;; Decode errno into a string.
+(defun strerror (&optional (errno (get-errno)))
+  (alien-funcall (extern-alien "strerror" (function c-string int)) errno))