1 /* $OpenBSD: getcwd.c,v 1.22 2023/05/18 16:11:09 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 char * 25 getcwd(char *buf, size_t size) 26 { 27 char *allocated = NULL; 28 29 if (buf != NULL && size == 0) { 30 errno = EINVAL; 31 return (NULL); 32 } 33 34 if (buf == NULL && 35 (allocated = buf = malloc(size = PATH_MAX)) == NULL) 36 return (NULL); 37 38 if (__getcwd(buf, size) == -1) { 39 free(allocated); 40 return (NULL); 41 } 42 43 return (buf); 44 } 45 DEF_WEAK(getcwd); 46