1/*
2 * Copyright (c) 2007, 2010, 2023 Apple Inc. All rights reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. Please obtain a copy of the License at
10 * http://www.opensource.apple.com/apsl/ and read it before using this
11 * file.
12 *
13 * The Original Code and all software distributed under the License are
14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
18 * Please see the License for the specific language governing rights and
19 * limitations under the License.
20 *
21 * @APPLE_LICENSE_HEADER_END@
22 */
23
24#ifndef _STDIO_H_
25 #error error "Never use <secure/_stdio.h> directly; include <stdio.h> instead."
26#endif
27
28#ifndef _SECURE__STDIO_H_
29#define _SECURE__STDIO_H_
30
31#include <_bounds.h>
32#include <secure/_common.h>
33
34_LIBC_SINGLE_BY_DEFAULT()
35
36#if _USE_FORTIFY_LEVEL > 0
37
38extern int __snprintf_chk (char * __restrict _LIBC_COUNT(__maxlen), size_t __maxlen, int, size_t,
39 const char * __restrict, ...);
40extern int __vsnprintf_chk (char * __restrict _LIBC_COUNT(__maxlen), size_t __maxlen, int, size_t,
41 const char * __restrict, va_list);
42
43extern int __sprintf_chk (char * __restrict _LIBC_UNSAFE_INDEXABLE, int, size_t,
44 const char * __restrict, ...);
45extern int __vsprintf_chk (char * __restrict _LIBC_UNSAFE_INDEXABLE, int, size_t,
46 const char * __restrict, va_list);
47
48#ifdef __LIBC_STAGED_BOUNDS_SAFETY_ATTRIBUTES
49
50/* verify that there are at least __n characters at __str */
51static inline char *_LIBC_COUNT(__n)
52__libc_ptrchk_strbuf_chk(char *_LIBC_COUNT(__n) __str, size_t __n) { return __str; }
53
54#undef __sprintf_chk_func /* sprintf is unavailable */
55#undef __vsprintf_chk_func /* vsprintf is unavailable */
56
57#define __vsnprintf_chk_func(str, len, flag, format, ap) ({ \
58 size_t __len = (len); \
59 __builtin___vsnprintf_chk (__libc_ptrchk_strbuf_chk(str, __len), __len, flag, __darwin_obsz(str), format, ap); \
60})
61
62#define __snprintf_chk_func(str, len, flag, ...) ({ \
63 size_t __len = (len); \
64 __builtin___snprintf_chk (__libc_ptrchk_strbuf_chk(str, __len), __len, flag, __darwin_obsz(str), __VA_ARGS__); \
65})
66
67#else
68
69#ifndef __has_builtin
70#define __undef__has_builtin
71#define __has_builtin(x) defined(__GNUC__)
72#endif
73
74#if __has_builtin(__builtin___snprintf_chk)
75#define __snprintf_chk_func(str, len, flag, ...) \
76 __builtin___snprintf_chk (str, len, flag, __darwin_obsz(str), __VA_ARGS__)
77#endif
78
79#if __has_builtin(__builtin___vsnprintf_chk)
80#define __vsnprintf_chk_func(str, len, flag, format, ap) \
81 __builtin___vsnprintf_chk (str, len, flag, __darwin_obsz(str), format, ap)
82#endif
83
84
85#if __has_builtin(__builtin___sprintf_chk)
86#define __sprintf_chk_func(str, flag, ...) \
87 __builtin___sprintf_chk (str, flag, __darwin_obsz(str), __VA_ARGS__)
88#endif
89
90#if __has_builtin(__builtin___vsprintf_chk)
91#define __vsprintf_chk_func(str, flag, format, ap) \
92 __builtin___vsprintf_chk (str, flag, __darwin_obsz(str), format, ap)
93#endif
94
95
96#ifdef __undef__has_builtin
97#undef __undef__has_builtin
98#undef __has_builtin
99#endif
100
101#endif
102
103/* sprintf, vsprintf, snprintf, vsnprintf */
104
105#ifdef __sprintf_chk_func
106#undef sprintf
107#define sprintf(str, ...) __sprintf_chk_func (str, 0, __VA_ARGS__)
108#endif
109
110#if __DARWIN_C_LEVEL >= 200112L
111
112#ifdef __vsprintf_chk_func
113#undef vsprintf
114#define vsprintf(str, ...) __vsprintf_chk_func (str, 0, __VA_ARGS__)
115#endif
116
117#ifdef __snprintf_chk_func
118#undef snprintf
119#define snprintf(str, len, ...) __snprintf_chk_func (str, len, 0, __VA_ARGS__)
120#endif
121
122#ifdef __vsnprintf_chk_func
123#undef vsnprintf
124#define vsnprintf(str, len, ...) __vsnprintf_chk_func (str, len, 0, __VA_ARGS__)
125#endif
126
127#endif
128
129#endif /* _USE_FORTIFY_LEVEL > 0 */
130#endif /* _SECURE__STDIO_H_ */