1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1990, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Copyright (c) 2011 The FreeBSD Foundation
8 *
9 * Portions of this software were developed by David Chisnall
10 * under sponsorship from the FreeBSD Foundation.
11 *
12 * This code is derived from software contributed to Berkeley by
13 * Chris Torek.
14 *
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions
17 * are met:
18 * 1. Redistributions of source code must retain the above copyright
19 * notice, this list of conditions and the following disclaimer.
20 * 2. Redistributions in binary form must reproduce the above copyright
21 * notice, this list of conditions and the following disclaimer in the
22 * documentation and/or other materials provided with the distribution.
23 * 3. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * SUCH DAMAGE.
38 */
39
40 #include <errno.h>
41 #include <limits.h>
42 #include <stdio.h>
43 #include <stdarg.h>
44 #include "xlocale_private.h"
45
46 #include "local.h"
47
48 #undef snprintf /* _FORTIFY_SOURCE */
49
50 int
snprintf(char * __restrict str,size_t n,char const * __restrict fmt,...)51 snprintf(char * __restrict str, size_t n, char const * __restrict fmt, ...)
52 {
53 FILE f = FAKE_FILE;
54 va_list ap;
55 size_t on;
56 int serrno = errno;
57 int ret;
58
59 on = n;
60 if (n != 0)
61 n--;
62 if (n > INT_MAX) {
63 errno = EOVERFLOW;
64 *str = '\0';
65 return (EOF);
66 }
67 va_start(ap, fmt);
68 f._flags = __SWR | __SSTR;
69 f._bf._base = f._p = (unsigned char *)str;
70 f._bf._size = f._w = n;
71 ret = __vfprintf(&f, __get_locale(), serrno, fmt, ap);
72 if (on > 0)
73 *f._p = '\0';
74 va_end(ap);
75 return (ret);
76 }
77 int
snprintf_l(char * __restrict str,size_t n,locale_t locale,char const * __restrict fmt,...)78 snprintf_l(char * __restrict str, size_t n, locale_t locale,
79 char const * __restrict fmt, ...)
80 {
81 FILE f = FAKE_FILE;
82 va_list ap;
83 size_t on;
84 int serrno = errno;
85 int ret;
86 FIX_LOCALE(locale);
87
88 on = n;
89 if (n != 0)
90 n--;
91 if (n > INT_MAX) {
92 errno = EOVERFLOW;
93 *str = '\0';
94 return (EOF);
95 }
96 va_start(ap, fmt);
97 f._flags = __SWR | __SSTR;
98 f._bf._base = f._p = (unsigned char *)str;
99 f._bf._size = f._w = n;
100 ret = __vfprintf(&f, locale, serrno, fmt, ap);
101 if (on > 0)
102 *f._p = '\0';
103 va_end(ap);
104 return (ret);
105 }
106