1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 /* 30 * getcwd() returns the pathname of the current working directory. 31 * On error, a NULL pointer is returned and errno is set. 32 */ 33 34 #pragma weak getcwd = _getcwd 35 36 #include "synonyms.h" 37 #include <sys/syscall.h> 38 #include <sys/types.h> 39 #include <errno.h> 40 #include <stdlib.h> 41 42 char * 43 getcwd(char *pathname, size_t size) 44 { 45 int alloc = 0; 46 47 if (size == 0) { 48 errno = EINVAL; 49 return (NULL); 50 } 51 52 if (pathname == NULL) { 53 if ((pathname = malloc(size)) == NULL) { 54 errno = ENOMEM; 55 return (NULL); 56 } 57 alloc = 1; 58 } 59 60 if (syscall(SYS_getcwd, pathname, size) == 0) 61 return (pathname); 62 63 if (alloc) 64 free(pathname); 65 66 return (NULL); 67 } 68