xref: /illumos-gate/usr/src/lib/libc/port/gen/strerror.c (revision 3db86aab)
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 /*	Copyright (c) 1988 AT&T	*/
30 /*	  All Rights Reserved  	*/
31 
32 
33 #pragma weak strerror = _strerror
34 #pragma weak strerror_r = _strerror_r
35 
36 #include "synonyms.h"
37 #include "_libc_gettext.h"
38 #include <string.h>
39 #include <sys/types.h>
40 #include <errno.h>
41 
42 extern const char _sys_errs[];
43 extern const int _sys_index[];
44 extern int _sys_num_err;
45 
46 char *
47 _strerror(int errnum)
48 {
49 	if (errnum < _sys_num_err && errnum >= 0)
50 		return (_libc_gettext((char *)&_sys_errs[_sys_index[errnum]]));
51 
52 	errno = EINVAL;
53 	return (_libc_gettext("Unknown error"));
54 }
55 
56 /*
57  * Implemented strerror_r in Solaris 10 to comply with SUSv3 2001.
58  */
59 int
60 _strerror_r(int errnum, char *strerrbuf, size_t buflen)
61 {
62 	char *buf;
63 	int ret = 0;
64 
65 	if (errnum < _sys_num_err && errnum >= 0) {
66 		buf = _libc_gettext((char *)&_sys_errs[_sys_index[errnum]]);
67 	} else {
68 		buf = _libc_gettext("Unknown error");
69 		ret = errno = EINVAL;
70 	}
71 
72 	/*
73 	 * At compile time, there is no way to determine the max size of
74 	 * language-dependent error message.
75 	 */
76 	if (buflen < (strlen(buf) + 1)) {
77 		ret = errno = ERANGE;
78 	} else {
79 		(void) strcpy(strerrbuf, buf);
80 	}
81 
82 	return (ret);
83 }
84