Line data Source code
1 : /* Checking macros for stdlib functions.
2 : Copyright (C) 2005-2024 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 : __NTH (realpath (const char *__restrict __name, char *__restrict __resolved))
38 : {
39 : size_t sz = __glibc_objsize (__resolved);
40 :
41 : if (sz == (size_t) -1)
42 : return __realpath_alias (__name, __resolved);
43 :
44 : #if defined _LIBC_LIMITS_H_ && defined PATH_MAX
45 : if (__glibc_unsafe_len (PATH_MAX, sizeof (char), sz))
46 : return __realpath_chk_warn (__name, __resolved, sz);
47 : #endif
48 : return __realpath_chk (__name, __resolved, sz);
49 : }
50 :
51 :
52 : extern int __ptsname_r_chk (int __fd, char *__buf, size_t __buflen,
53 : size_t __nreal) __THROW __nonnull ((2))
54 : __attr_access ((__write_only__, 2, 3));
55 : extern int __REDIRECT_NTH (__ptsname_r_alias, (int __fd, char *__buf,
56 : size_t __buflen), ptsname_r)
57 : __nonnull ((2)) __attr_access ((__write_only__, 2, 3));
58 : extern int __REDIRECT_NTH (__ptsname_r_chk_warn,
59 : (int __fd, char *__buf, size_t __buflen,
60 : size_t __nreal), __ptsname_r_chk)
61 : __nonnull ((2)) __warnattr ("ptsname_r called with buflen bigger than "
62 : "size of buf");
63 :
64 : __fortify_function int
65 61 : __NTH (ptsname_r (int __fd, char *__buf, size_t __buflen))
66 : {
67 61 : return __glibc_fortify (ptsname_r, __buflen, sizeof (char),
68 : __glibc_objsize (__buf),
69 : __fd, __buf, __buflen);
70 : }
71 :
72 :
73 : extern int __wctomb_chk (char *__s, wchar_t __wchar, size_t __buflen)
74 : __THROW __wur;
75 : extern int __REDIRECT_NTH (__wctomb_alias, (char *__s, wchar_t __wchar),
76 : wctomb) __wur;
77 :
78 : __fortify_function __wur int
79 : __NTH (wctomb (char *__s, wchar_t __wchar))
80 : {
81 : /* We would have to include <limits.h> to get a definition of MB_LEN_MAX.
82 : But this would only disturb the namespace. So we define our own
83 : version here. */
84 : #define __STDLIB_MB_LEN_MAX 16
85 : #if defined MB_LEN_MAX && MB_LEN_MAX != __STDLIB_MB_LEN_MAX
86 : # error "Assumed value of MB_LEN_MAX wrong"
87 : #endif
88 : if (__glibc_objsize (__s) != (size_t) -1
89 : && __STDLIB_MB_LEN_MAX > __glibc_objsize (__s))
90 : return __wctomb_chk (__s, __wchar, __glibc_objsize (__s));
91 : return __wctomb_alias (__s, __wchar);
92 : }
93 :
94 :
95 : extern size_t __mbstowcs_chk (wchar_t *__restrict __dst,
96 : const char *__restrict __src,
97 : size_t __len, size_t __dstlen) __THROW
98 : __attr_access ((__write_only__, 1, 3)) __attr_access ((__read_only__, 2));
99 : extern size_t __REDIRECT_NTH (__mbstowcs_nulldst,
100 : (wchar_t *__restrict __dst,
101 : const char *__restrict __src,
102 : size_t __len), mbstowcs)
103 : __attr_access ((__read_only__, 2));
104 : extern size_t __REDIRECT_NTH (__mbstowcs_alias,
105 : (wchar_t *__restrict __dst,
106 : const char *__restrict __src,
107 : size_t __len), mbstowcs)
108 : __attr_access ((__write_only__, 1, 3)) __attr_access ((__read_only__, 2));
109 : extern size_t __REDIRECT_NTH (__mbstowcs_chk_warn,
110 : (wchar_t *__restrict __dst,
111 : const char *__restrict __src,
112 : size_t __len, size_t __dstlen), __mbstowcs_chk)
113 : __warnattr ("mbstowcs called with dst buffer smaller than len "
114 : "* sizeof (wchar_t)");
115 :
116 : __fortify_function size_t
117 : __NTH (mbstowcs (wchar_t *__restrict __dst, const char *__restrict __src,
118 : size_t __len))
119 : {
120 : if (__builtin_constant_p (__dst == NULL) && __dst == NULL)
121 : return __mbstowcs_nulldst (__dst, __src, __len);
122 : else
123 : return __glibc_fortify_n (mbstowcs, __len, sizeof (wchar_t),
124 : __glibc_objsize (__dst), __dst, __src, __len);
125 : }
126 :
127 : extern size_t __wcstombs_chk (char *__restrict __dst,
128 : const wchar_t *__restrict __src,
129 : size_t __len, size_t __dstlen) __THROW
130 : __attr_access ((__write_only__, 1, 3)) __attr_access ((__read_only__, 2));
131 : extern size_t __REDIRECT_NTH (__wcstombs_alias,
132 : (char *__restrict __dst,
133 : const wchar_t *__restrict __src,
134 : size_t __len), wcstombs)
135 : __attr_access ((__write_only__, 1, 3)) __attr_access ((__read_only__, 2));
136 : extern size_t __REDIRECT_NTH (__wcstombs_chk_warn,
137 : (char *__restrict __dst,
138 : const wchar_t *__restrict __src,
139 : size_t __len, size_t __dstlen), __wcstombs_chk)
140 : __warnattr ("wcstombs called with dst buffer smaller than len");
141 :
142 : __fortify_function size_t
143 : __NTH (wcstombs (char *__restrict __dst, const wchar_t *__restrict __src,
144 : size_t __len))
145 : {
146 : return __glibc_fortify (wcstombs, __len, sizeof (char),
147 : __glibc_objsize (__dst),
148 : __dst, __src, __len);
149 : }
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