Line data Source code
1 : /* Checking macros for stdlib functions.
2 : Copyright (C) 2005-2020 Free Software Foundation, Inc.
3 : This file is part of the GNU C Library.
4 :
5 : The GNU C Library is free software; you can redistribute it and/or
6 : modify it under the terms of the GNU Lesser General Public
7 : License as published by the Free Software Foundation; either
8 : version 2.1 of the License, or (at your option) any later version.
9 :
10 : The GNU C Library is distributed in the hope that it will be useful,
11 : but WITHOUT ANY WARRANTY; without even the implied warranty of
12 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 : Lesser General Public License for more details.
14 :
15 : You should have received a copy of the GNU Lesser General Public
16 : License along with the GNU C Library; if not, see
17 : <https://www.gnu.org/licenses/>. */
18 :
19 : #ifndef _STDLIB_H
20 : # error "Never include <bits/stdlib.h> directly; use <stdlib.h> instead."
21 : #endif
22 :
23 : extern char *__realpath_chk (const char *__restrict __name,
24 : char *__restrict __resolved,
25 : size_t __resolvedlen) __THROW __wur;
26 : extern char *__REDIRECT_NTH (__realpath_alias,
27 : (const char *__restrict __name,
28 : char *__restrict __resolved), realpath) __wur;
29 : extern char *__REDIRECT_NTH (__realpath_chk_warn,
30 : (const char *__restrict __name,
31 : char *__restrict __resolved,
32 : size_t __resolvedlen), __realpath_chk) __wur
33 : __warnattr ("second argument of realpath must be either NULL or at "
34 : "least PATH_MAX bytes long buffer");
35 :
36 : __fortify_function __wur char *
37 1601 : __NTH (realpath (const char *__restrict __name, char *__restrict __resolved))
38 : {
39 1601 : if (__bos (__resolved) != (size_t) -1)
40 : {
41 : #if defined _LIBC_LIMITS_H_ && defined PATH_MAX
42 : if (__bos (__resolved) < PATH_MAX)
43 : return __realpath_chk_warn (__name, __resolved, __bos (__resolved));
44 : #endif
45 1601 : return __realpath_chk (__name, __resolved, __bos (__resolved));
46 : }
47 :
48 : return __realpath_alias (__name, __resolved);
49 : }
50 :
51 :
52 : extern int __ptsname_r_chk (int __fd, char *__buf, size_t __buflen,
53 : size_t __nreal) __THROW __nonnull ((2));
54 : extern int __REDIRECT_NTH (__ptsname_r_alias, (int __fd, char *__buf,
55 : size_t __buflen), ptsname_r)
56 : __nonnull ((2));
57 : extern int __REDIRECT_NTH (__ptsname_r_chk_warn,
58 : (int __fd, char *__buf, size_t __buflen,
59 : size_t __nreal), __ptsname_r_chk)
60 : __nonnull ((2)) __warnattr ("ptsname_r called with buflen bigger than "
61 : "size of buf");
62 :
63 : __fortify_function int
64 : __NTH (ptsname_r (int __fd, char *__buf, size_t __buflen))
65 : {
66 : if (__bos (__buf) != (size_t) -1)
67 : {
68 : if (!__builtin_constant_p (__buflen))
69 : return __ptsname_r_chk (__fd, __buf, __buflen, __bos (__buf));
70 : if (__buflen > __bos (__buf))
71 : return __ptsname_r_chk_warn (__fd, __buf, __buflen, __bos (__buf));
72 : }
73 : return __ptsname_r_alias (__fd, __buf, __buflen);
74 : }
75 :
76 :
77 : extern int __wctomb_chk (char *__s, wchar_t __wchar, size_t __buflen)
78 : __THROW __wur;
79 : extern int __REDIRECT_NTH (__wctomb_alias, (char *__s, wchar_t __wchar),
80 : wctomb) __wur;
81 :
82 : __fortify_function __wur int
83 : __NTH (wctomb (char *__s, wchar_t __wchar))
84 : {
85 : /* We would have to include <limits.h> to get a definition of MB_LEN_MAX.
86 : But this would only disturb the namespace. So we define our own
87 : version here. */
88 : #define __STDLIB_MB_LEN_MAX 16
89 : #if defined MB_LEN_MAX && MB_LEN_MAX != __STDLIB_MB_LEN_MAX
90 : # error "Assumed value of MB_LEN_MAX wrong"
91 : #endif
92 : if (__bos (__s) != (size_t) -1 && __STDLIB_MB_LEN_MAX > __bos (__s))
93 : return __wctomb_chk (__s, __wchar, __bos (__s));
94 : return __wctomb_alias (__s, __wchar);
95 : }
96 :
97 :
98 : extern size_t __mbstowcs_chk (wchar_t *__restrict __dst,
99 : const char *__restrict __src,
100 : size_t __len, size_t __dstlen) __THROW;
101 : extern size_t __REDIRECT_NTH (__mbstowcs_alias,
102 : (wchar_t *__restrict __dst,
103 : const char *__restrict __src,
104 : size_t __len), mbstowcs);
105 : extern size_t __REDIRECT_NTH (__mbstowcs_chk_warn,
106 : (wchar_t *__restrict __dst,
107 : const char *__restrict __src,
108 : size_t __len, size_t __dstlen), __mbstowcs_chk)
109 : __warnattr ("mbstowcs called with dst buffer smaller than len "
110 : "* sizeof (wchar_t)");
111 :
112 : __fortify_function size_t
113 : __NTH (mbstowcs (wchar_t *__restrict __dst, const char *__restrict __src,
114 : size_t __len))
115 : {
116 : if (__bos (__dst) != (size_t) -1)
117 : {
118 : if (!__builtin_constant_p (__len))
119 : return __mbstowcs_chk (__dst, __src, __len,
120 : __bos (__dst) / sizeof (wchar_t));
121 :
122 : if (__len > __bos (__dst) / sizeof (wchar_t))
123 : return __mbstowcs_chk_warn (__dst, __src, __len,
124 : __bos (__dst) / sizeof (wchar_t));
125 : }
126 : return __mbstowcs_alias (__dst, __src, __len);
127 : }
128 :
129 :
130 : extern size_t __wcstombs_chk (char *__restrict __dst,
131 : const wchar_t *__restrict __src,
132 : size_t __len, size_t __dstlen) __THROW;
133 : extern size_t __REDIRECT_NTH (__wcstombs_alias,
134 : (char *__restrict __dst,
135 : const wchar_t *__restrict __src,
136 : size_t __len), wcstombs);
137 : extern size_t __REDIRECT_NTH (__wcstombs_chk_warn,
138 : (char *__restrict __dst,
139 : const wchar_t *__restrict __src,
140 : size_t __len, size_t __dstlen), __wcstombs_chk)
141 : __warnattr ("wcstombs called with dst buffer smaller than len");
142 :
143 : __fortify_function size_t
144 : __NTH (wcstombs (char *__restrict __dst, const wchar_t *__restrict __src,
145 : size_t __len))
146 : {
147 : if (__bos (__dst) != (size_t) -1)
148 : {
149 : if (!__builtin_constant_p (__len))
150 : return __wcstombs_chk (__dst, __src, __len, __bos (__dst));
151 : if (__len > __bos (__dst))
152 : return __wcstombs_chk_warn (__dst, __src, __len, __bos (__dst));
153 : }
154 : return __wcstombs_alias (__dst, __src, __len);
155 : }
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