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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * $FreeBSD: src/lib/libc/gen/getcwd.c,v 1.18 1999/09/28 13:24:13 marcel Exp $ 34 * $DragonFly: src/lib/libc/gen/getcwd.c,v 1.6 2005/04/26 06:04:56 joerg Exp $ 35 * 36 * @(#)getcwd.c 8.5 (Berkeley) 2/7/95 37 */ 38 39 #include <sys/param.h> 40 #include <stdlib.h> 41 #include <unistd.h> 42 43 int __getcwd(char *pt, size_t size); 44 45 char * 46 getcwd(char *pt, size_t size) 47 { 48 int allocated = 0, ret; 49 50 /* 51 * If no buffer specified by the user, allocate one as necessary. 52 */ 53 if (pt == NULL) { 54 size = MAXPATHLEN; 55 if ((pt = malloc(MAXPATHLEN)) == NULL) 56 return(NULL); 57 allocated = 1; 58 } 59 ret = __getcwd(pt, size); 60 if (ret == 0) 61 return (pt); 62 if (allocated) 63 free(pt); 64 return (NULL); 65 } 66