1 /* $NetBSD: h_readlink.c,v 1.1 2010/12/27 02:04:19 pgoyette Exp $ */ 2 3 /* 4 * Copyright (c) 2008 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __COPYRIGHT("@(#) Copyright (c) 2008\ 31 The NetBSD Foundation, inc. All rights reserved."); 32 __RCSID("$NetBSD: h_readlink.c,v 1.1 2010/12/27 02:04:19 pgoyette Exp $"); 33 34 #include <sys/param.h> 35 #include <stdio.h> 36 #include <unistd.h> 37 #include <stdlib.h> 38 39 #ifdef __FreeBSD__ 40 #include <err.h> 41 #include <string.h> 42 #endif 43 44 int 45 main(int argc, char *argv[]) 46 { 47 #ifdef __FreeBSD__ 48 char b[512], *sl; 49 size_t len = atoi(argv[1]); 50 sl = malloc(len); 51 memset(sl, 'a', len); 52 sl[len - 1] = 0; 53 unlink("symlink"); 54 if (symlink(sl, "symlink") == -1) 55 err(1, "symlink()"); 56 (void)readlink("symlink", b, len); 57 unlink("symlink"); 58 #else 59 char b[MAXPATHLEN]; 60 size_t len = atoi(argv[1]); 61 (void)readlink("/", b, len); 62 #endif 63 (void)printf("%s\n", b); 64 return 0; 65 } 66