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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2008 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 "lint.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