xref: /illumos-gate/usr/src/lib/libc/port/gen/strerror.c (revision c3377ee9a5b3bff76dbf51347a8de3d215eb6cca)
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 2015 Joyent, Inc.
28  */
29 
30 /*	Copyright (c) 1988 AT&T	*/
31 /*	  All Rights Reserved  	*/
32 
33 #include "lint.h"
34 #include "_libc_gettext.h"
35 #include <string.h>
36 #include <sys/types.h>
37 #include <errno.h>
38 
39 extern const char _sys_errs[];
40 extern const int _sys_index[];
41 extern int _sys_num_err;
42 
43 char *
44 strerror_l(int errnum, locale_t loc)
45 {
46 	if (errnum < _sys_num_err && errnum >= 0)
47 		return (_libc_gettext_l(&_sys_errs[_sys_index[errnum]],
48 		    loc));
49 
50 	errno = EINVAL;
51 	return (_libc_gettext_l("Unknown error", loc));
52 }
53 
54 char *
55 strerror(int errnum)
56 {
57 	return (strerror_l(errnum, uselocale(NULL)));
58 }
59 
60 /*
61  * Implemented strerror_r in Solaris 10 to comply with SUSv3 2001.
62  */
63 int
64 strerror_r(int errnum, char *strerrbuf, size_t buflen)
65 {
66 	char *buf;
67 	int ret = 0;
68 
69 	if (errnum < _sys_num_err && errnum >= 0) {
70 		buf = _libc_gettext((char *)&_sys_errs[_sys_index[errnum]]);
71 	} else {
72 		buf = _libc_gettext("Unknown error");
73 		ret = errno = EINVAL;
74 	}
75 
76 	/*
77 	 * At compile time, there is no way to determine the max size of
78 	 * language-dependent error message.
79 	 */
80 	if (buflen < (strlen(buf) + 1)) {
81 		ret = errno = ERANGE;
82 	} else {
83 		(void) strcpy(strerrbuf, buf);
84 	}
85 
86 	return (ret);
87 }
88