+#-win32
+(progn
+ (export 'readlink :sb-posix)
+ (defun readlink (pathspec)
+ (flet ((%readlink (path buf length)
+ (alien-funcall
+ (extern-alien "readlink" (function int c-string (* t) int))
+ path buf length)))
+ (loop for size = 128 then (* 2 size)
+ for buf = (make-alien c-string size)
+ do (unwind-protect
+ (let ((count (%readlink (filename pathspec) buf size)))
+ (cond ((minusp count)
+ (syscall-error))
+ ((< 0 count size)
+ (setf (sb-sys:sap-ref-8 (sb-alien:alien-sap buf)
+ count)
+ 0)
+ (return
+ (sb-alien::c-string-to-string
+ (sb-alien:alien-sap buf)
+ (sb-impl::default-external-format)
+ 'character)))))
+ (free-alien buf))))))