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;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
;;;; *************************************************************************
;;;; FILE IDENTIFICATION
;;;;
;;;; Name: gethostname.lisp
;;;; Purpose: UFFI Example file to get hostname of system
;;;; Programmer: Kevin M. Rosenberg
;;;; Date Started: Feb 2002
;;;;
;;;; This file, part of UFFI, is Copyright (c) 2002-2010 by Kevin M. Rosenberg
;;;;
;;;; *************************************************************************
(in-package #:uffi-tests)
;;; This example is inspired by the example on the CL-Cookbook web site
(eval-when (:compile-toplevel :load-toplevel :execute)
(uffi:def-function ("gethostname" c-gethostname)
((name (* :unsigned-char))
(len :int))
:returning :int)
(defun gethostname ()
"Returns the hostname"
(let* ((name (uffi:allocate-foreign-string 256))
(result-code (c-gethostname name 256))
(hostname (when (zerop result-code)
(uffi:convert-from-foreign-string name))))
(uffi:free-foreign-object name)
(unless (zerop result-code)
(error "gethostname() failed."))
hostname))
(defun gethostname2 ()
"Returns the hostname"
(uffi:with-foreign-object (name '(:array :unsigned-char 256))
(if (zerop (c-gethostname (uffi:char-array-to-pointer name) 256))
(uffi:convert-from-foreign-string name)
(error "gethostname() failed.")))))
(deftest :gethostname.1 (stringp (gethostname)) t)
(deftest :gethostname.2 (stringp (gethostname2)) t)
(deftest :gethostname.3 (plusp (length (gethostname))) t)
(deftest :gethostname.4 (plusp (length (gethostname2))) t)
(deftest :gethostname.5 (string= (gethostname) (gethostname2)) t)
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