/usr/share/doc/cl-uffi/examples/gethostname.lisp is in cl-uffi 2.1.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 | ;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
;;;; *************************************************************************
;;;; FILE IDENTIFICATION
;;;;
;;;; Name: gethostname.cl
;;;; 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 :cl-user)
;;; This example is inspired by the example on the CL-Cookbook web site
(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."))))
#+examples-uffi
(progn
(format t "~&Hostname (technique 1): ~A" (gethostname))
(format t "~&Hostname (technique 2): ~A" (gethostname2)))
#+test-uffi
(progn
(let ((hostname1 (gethostname))
(hostname2 (gethostname2)))
(util.test:test (and (stringp hostname1) (stringp hostname2)) t
:fail-info "gethostname not string")
(util.test:test (and (not (zerop (length hostname1)))
(not (zerop (length hostname2)))) t
:fail-info "gethostname length 0")
(util.test:test (string= hostname1 hostname1) t
:fail-info "gethostname techniques don't match"))
)
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