1 /* $OpenBSD: getcwd.c,v 1.21 2016/05/07 19:48:00 guenther 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 <errno.h> 20 #include <limits.h> 21 #include <stdlib.h> 22 #include <unistd.h> 23 24 int __getcwd(char *buf, size_t len); 25 PROTO_NORMAL(__getcwd); 26 27 char * 28 getcwd(char *buf, size_t size) 29 { 30 char *allocated = NULL; 31 32 if (buf != NULL && size == 0) { 33 errno = EINVAL; 34 return (NULL); 35 } 36 37 if (buf == NULL && 38 (allocated = buf = malloc(size = PATH_MAX)) == NULL) 39 return (NULL); 40 41 if (__getcwd(buf, size) == -1) { 42 free(allocated); 43 return (NULL); 44 } 45 46 return (buf); 47 } 48 DEF_WEAK(getcwd); 49