xref: /illumos-gate/usr/src/lib/libc/port/gen/getwd.c (revision 20a7641f9918de8574b8b3b47dbe35c4bfc78df1)
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 #include "lint.h"
28 #include <sys/types.h>
29 #include <sys/param.h>
30 #include <errno.h>
31 #include <unistd.h>
32 #include <string.h>
33 #include <stdlib.h>
34 #include <limits.h>
35 
36 char *
37 getwd(char *pathname)
38 {
39 	char *c;
40 	long val;
41 
42 
43 	if ((val = pathconf(".", _PC_PATH_MAX)) == -1)
44 		val = MAXPATHLEN + 1;
45 
46 	if ((c = getcwd(pathname, val)) == NULL) {
47 		if (errno == EACCES)
48 			(void) strcpy(pathname,
49 			    "getwd: a parent directory cannot be read");
50 		else if (errno == ERANGE)
51 			(void) strcpy(pathname, "getwd: buffer too small");
52 		else
53 			(void) strcpy(pathname, "getwd: failure occurred");
54 		return (0);
55 	}
56 
57 	return (c);
58 }
59