1 /* 2 * Copyright (c) 1989, 1991, 1993, 1995 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: src/lib/libc/gen/getcwd.c,v 1.18 1999/09/28 13:24:13 marcel Exp $ 30 * $DragonFly: src/lib/libc/gen/getcwd.c,v 1.6 2005/04/26 06:04:56 joerg Exp $ 31 * 32 * @(#)getcwd.c 8.5 (Berkeley) 2/7/95 33 */ 34 35 #include <sys/param.h> 36 #include <stdlib.h> 37 #include <unistd.h> 38 39 int __getcwd(char *pt, size_t size); 40 41 char * 42 getcwd(char *pt, size_t size) 43 { 44 int allocated = 0, ret; 45 46 /* 47 * If no buffer specified by the user, allocate one as necessary. 48 */ 49 if (pt == NULL) { 50 size = MAXPATHLEN; 51 if ((pt = malloc(MAXPATHLEN)) == NULL) 52 return(NULL); 53 allocated = 1; 54 } 55 ret = __getcwd(pt, size); 56 if (ret == 0) 57 return (pt); 58 if (allocated) 59 free(pt); 60 return (NULL); 61 } 62