1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1988, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #if defined(NLS)
33 #include <nl_types.h>
34 #endif
35
36 #include <limits.h>
37 #include <errno.h>
38 #include <string.h>
39 #include <stdio.h>
40
41 #include <ssp/ssp.h>
42
43 #include "errlst.h"
44 #include "../locale/xlocale_private.h"
45 #include "libc_private.h"
46
47 /*
48 * Define buffer big enough to contain delimiter (": ", 2 bytes),
49 * 64-bit signed integer converted to ASCII decimal (19 bytes) with
50 * optional leading sign (1 byte), and a trailing NUL.
51 */
52 #define EBUFSIZE (2 + 19 + 1 + 1)
53
54 /*
55 * Doing this by hand instead of linking with stdio(3) avoids bloat for
56 * statically linked binaries.
57 */
58 static void
errstr(int num,const char * uprefix,char * buf,size_t len)59 errstr(int num, const char *uprefix, char *buf, size_t len)
60 {
61 char *t;
62 unsigned int uerr;
63 char tmp[EBUFSIZE];
64
65 t = tmp + sizeof(tmp);
66 *--t = '\0';
67 uerr = (num >= 0) ? num : -num;
68 do {
69 *--t = "0123456789"[uerr % 10];
70 } while (uerr /= 10);
71 if (num < 0)
72 *--t = '-';
73 *--t = ' ';
74 *--t = ':';
75 strlcpy(buf, uprefix, len);
76 strlcat(buf, t, len);
77 }
78
79 int
__strerror_rl(int errnum,char * strerrbuf,size_t buflen,locale_t locale)80 __strerror_rl(int errnum, char *strerrbuf, size_t buflen, locale_t locale)
81 {
82 int retval = 0;
83 #if defined(NLS)
84 int saved_errno = errno;
85 nl_catd catd;
86
87 catd = __catopen_l("libc", NL_CAT_LOCALE, locale);
88 #endif
89
90 if (errnum < 0 || errnum >= __hidden_sys_nerr) {
91 errstr(errnum,
92 #if defined(NLS)
93 catgets(catd, 1, 0xffff, __uprefix),
94 #else
95 __uprefix,
96 #endif
97 strerrbuf, buflen);
98 retval = EINVAL;
99 } else {
100 if (strlcpy(strerrbuf,
101 #if defined(NLS)
102 catgets(catd, 1, errnum, __hidden_sys_errlist[errnum]),
103 #else
104 __hidden_sys_errlist[errnum],
105 #endif
106 buflen) >= buflen)
107 retval = ERANGE;
108 }
109
110 #if defined(NLS)
111 catclose(catd);
112 errno = saved_errno;
113 #endif
114
115 return (retval);
116 }
117
118 int
__ssp_real(strerror_r)119 __ssp_real(strerror_r)(int errnum, char *strerrbuf, size_t buflen)
120 {
121 return (__strerror_rl(errnum, strerrbuf, buflen, __get_locale()));
122 }
123
124 char *
strerror_l(int num,locale_t locale)125 strerror_l(int num, locale_t locale)
126 {
127 static _Thread_local char ebuf[NL_TEXTMAX];
128
129 if (__strerror_rl(num, ebuf, sizeof(ebuf), locale) != 0)
130 errno = EINVAL;
131 return (ebuf);
132 }
133
134 char *
strerror(int num)135 strerror(int num)
136 {
137 static char ebuf[NL_TEXTMAX];
138
139 if (__strerror_rl(num, ebuf, sizeof(ebuf), __get_locale()) != 0)
140 errno = EINVAL;
141 return (ebuf);
142 }
143