1 /* $OpenBSD: getcwd.c,v 1.17 2006/05/27 18:06:29 pedro Exp $ */ 2 3 /* 4 * Copyright (c) 2005 Marius Eriksen <marius@openbsd.org> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include <sys/param.h> 20 #include <errno.h> 21 #include <stdlib.h> 22 23 int __getcwd(char *buf, size_t len); 24 25 char * 26 getcwd(char *buf, size_t size) 27 { 28 char *allocated = NULL; 29 30 if (buf != NULL && size == 0) { 31 errno = EINVAL; 32 return (NULL); 33 } 34 35 if (buf == NULL && 36 (allocated = buf = malloc(size = MAXPATHLEN)) == NULL) 37 return (NULL); 38 39 if (__getcwd(buf, size) == -1) { 40 free(allocated); 41 return (NULL); 42 } 43 44 return (buf); 45 } 46