xref: /illumos-gate/usr/src/lib/libc/port/gen/strerror.c (revision 8b80e8cb6855118d46f605e91b5ed4ce83417395)
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 /*	Copyright (c) 1988 AT&T	*/
28 /*	  All Rights Reserved  	*/
29 
30 #pragma ident	"%Z%%M%	%I%	%E% SMI"
31 
32 #include "lint.h"
33 #include "_libc_gettext.h"
34 #include <string.h>
35 #include <sys/types.h>
36 #include <errno.h>
37 
38 extern const char _sys_errs[];
39 extern const int _sys_index[];
40 extern int _sys_num_err;
41 
42 char *
43 strerror(int errnum)
44 {
45 	if (errnum < _sys_num_err && errnum >= 0)
46 		return (_libc_gettext((char *)&_sys_errs[_sys_index[errnum]]));
47 
48 	errno = EINVAL;
49 	return (_libc_gettext("Unknown error"));
50 }
51 
52 /*
53  * Implemented strerror_r in Solaris 10 to comply with SUSv3 2001.
54  */
55 int
56 strerror_r(int errnum, char *strerrbuf, size_t buflen)
57 {
58 	char *buf;
59 	int ret = 0;
60 
61 	if (errnum < _sys_num_err && errnum >= 0) {
62 		buf = _libc_gettext((char *)&_sys_errs[_sys_index[errnum]]);
63 	} else {
64 		buf = _libc_gettext("Unknown error");
65 		ret = errno = EINVAL;
66 	}
67 
68 	/*
69 	 * At compile time, there is no way to determine the max size of
70 	 * language-dependent error message.
71 	 */
72 	if (buflen < (strlen(buf) + 1)) {
73 		ret = errno = ERANGE;
74 	} else {
75 		(void) strcpy(strerrbuf, buf);
76 	}
77 
78 	return (ret);
79 }
80