Home | History | Annotate | Line # | Download | only in ssp 
      1 /*	$NetBSD: ssp_redirect.c,v 1.3 2024/01/20 14:52:49 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2023 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Christos Zoulas.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #undef _FORTIFY_SOURCE
     33 #define _FORTIFY_SOURCE 2
     34 #define __ssp_inline
     35 
     36 #include <sys/cdefs.h>
     37 __RCSID("$NetBSD: ssp_redirect.c,v 1.3 2024/01/20 14:52:49 christos Exp $");
     38 
     39 #include <unistd.h>
     40 
     41 
     42 /*
     43  * Provide definitions of the redirect functions in libc.
     44  */
     45 static int __used
     46 /*LINTED unused*/
     47 __ssp_use(void)
     48 {
     49 	if (getcwd(NULL, 0) == NULL)
     50 		return -1;
     51 	if (read(-1, NULL, 0) == -1)
     52 		return -1;
     53 	if (readlink(NULL, NULL, 0) == -1)
     54 		return -1;
     55 	return 0;
     56 }
     57