Line data Source code
1 : /* Checking macros for fcntl functions.
2 : Copyright (C) 2007-2020 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 _FCNTL_H
20 : # error "Never include <bits/fcntl2.h> directly; use <fcntl.h> instead."
21 : #endif
22 :
23 : /* Check that calls to open and openat with O_CREAT or O_TMPFILE set have an
24 : appropriate third/fourth parameter. */
25 : #ifndef __USE_FILE_OFFSET64
26 : extern int __open_2 (const char *__path, int __oflag) __nonnull ((1));
27 : extern int __REDIRECT (__open_alias, (const char *__path, int __oflag, ...),
28 : open) __nonnull ((1));
29 : #else
30 : extern int __REDIRECT (__open_2, (const char *__path, int __oflag),
31 : __open64_2) __nonnull ((1));
32 : extern int __REDIRECT (__open_alias, (const char *__path, int __oflag, ...),
33 : open64) __nonnull ((1));
34 : #endif
35 : __errordecl (__open_too_many_args,
36 : "open can be called either with 2 or 3 arguments, not more");
37 : __errordecl (__open_missing_mode,
38 : "open with O_CREAT or O_TMPFILE in second argument needs 3 arguments");
39 :
40 : __fortify_function int
41 0 : open (const char *__path, int __oflag, ...)
42 : {
43 0 : if (__va_arg_pack_len () > 1)
44 : __open_too_many_args ();
45 :
46 0 : if (__builtin_constant_p (__oflag))
47 : {
48 0 : if (__OPEN_NEEDS_MODE (__oflag) && __va_arg_pack_len () < 1)
49 : {
50 : __open_missing_mode ();
51 : return __open_2 (__path, __oflag);
52 : }
53 0 : return __open_alias (__path, __oflag, __va_arg_pack ());
54 : }
55 :
56 0 : if (__va_arg_pack_len () < 1)
57 0 : return __open_2 (__path, __oflag);
58 :
59 0 : return __open_alias (__path, __oflag, __va_arg_pack ());
60 : }
61 :
62 :
63 : #ifdef __USE_LARGEFILE64
64 : extern int __open64_2 (const char *__path, int __oflag) __nonnull ((1));
65 : extern int __REDIRECT (__open64_alias, (const char *__path, int __oflag,
66 : ...), open64) __nonnull ((1));
67 : __errordecl (__open64_too_many_args,
68 : "open64 can be called either with 2 or 3 arguments, not more");
69 : __errordecl (__open64_missing_mode,
70 : "open64 with O_CREAT or O_TMPFILE in second argument needs 3 arguments");
71 :
72 : __fortify_function int
73 : open64 (const char *__path, int __oflag, ...)
74 : {
75 : if (__va_arg_pack_len () > 1)
76 : __open64_too_many_args ();
77 :
78 : if (__builtin_constant_p (__oflag))
79 : {
80 : if (__OPEN_NEEDS_MODE (__oflag) && __va_arg_pack_len () < 1)
81 : {
82 : __open64_missing_mode ();
83 : return __open64_2 (__path, __oflag);
84 : }
85 : return __open64_alias (__path, __oflag, __va_arg_pack ());
86 : }
87 :
88 : if (__va_arg_pack_len () < 1)
89 : return __open64_2 (__path, __oflag);
90 :
91 : return __open64_alias (__path, __oflag, __va_arg_pack ());
92 : }
93 : #endif
94 :
95 :
96 : #ifdef __USE_ATFILE
97 : # ifndef __USE_FILE_OFFSET64
98 : extern int __openat_2 (int __fd, const char *__path, int __oflag)
99 : __nonnull ((2));
100 : extern int __REDIRECT (__openat_alias, (int __fd, const char *__path,
101 : int __oflag, ...), openat)
102 : __nonnull ((2));
103 : # else
104 : extern int __REDIRECT (__openat_2, (int __fd, const char *__path,
105 : int __oflag), __openat64_2)
106 : __nonnull ((2));
107 : extern int __REDIRECT (__openat_alias, (int __fd, const char *__path,
108 : int __oflag, ...), openat64)
109 : __nonnull ((2));
110 : # endif
111 : __errordecl (__openat_too_many_args,
112 : "openat can be called either with 3 or 4 arguments, not more");
113 : __errordecl (__openat_missing_mode,
114 : "openat with O_CREAT or O_TMPFILE in third argument needs 4 arguments");
115 :
116 : __fortify_function int
117 : openat (int __fd, const char *__path, int __oflag, ...)
118 : {
119 : if (__va_arg_pack_len () > 1)
120 : __openat_too_many_args ();
121 :
122 : if (__builtin_constant_p (__oflag))
123 : {
124 : if (__OPEN_NEEDS_MODE (__oflag) && __va_arg_pack_len () < 1)
125 : {
126 : __openat_missing_mode ();
127 : return __openat_2 (__fd, __path, __oflag);
128 : }
129 : return __openat_alias (__fd, __path, __oflag, __va_arg_pack ());
130 : }
131 :
132 : if (__va_arg_pack_len () < 1)
133 : return __openat_2 (__fd, __path, __oflag);
134 :
135 : return __openat_alias (__fd, __path, __oflag, __va_arg_pack ());
136 : }
137 :
138 :
139 : # ifdef __USE_LARGEFILE64
140 : extern int __openat64_2 (int __fd, const char *__path, int __oflag)
141 : __nonnull ((2));
142 : extern int __REDIRECT (__openat64_alias, (int __fd, const char *__path,
143 : int __oflag, ...), openat64)
144 : __nonnull ((2));
145 : __errordecl (__openat64_too_many_args,
146 : "openat64 can be called either with 3 or 4 arguments, not more");
147 : __errordecl (__openat64_missing_mode,
148 : "openat64 with O_CREAT or O_TMPFILE in third argument needs 4 arguments");
149 :
150 : __fortify_function int
151 : openat64 (int __fd, const char *__path, int __oflag, ...)
152 : {
153 : if (__va_arg_pack_len () > 1)
154 : __openat64_too_many_args ();
155 :
156 : if (__builtin_constant_p (__oflag))
157 : {
158 : if (__OPEN_NEEDS_MODE (__oflag) && __va_arg_pack_len () < 1)
159 : {
160 : __openat64_missing_mode ();
161 : return __openat64_2 (__fd, __path, __oflag);
162 : }
163 : return __openat64_alias (__fd, __path, __oflag, __va_arg_pack ());
164 : }
165 :
166 : if (__va_arg_pack_len () < 1)
167 : return __openat64_2 (__fd, __path, __oflag);
168 :
169 : return __openat64_alias (__fd, __path, __oflag, __va_arg_pack ());
170 : }
171 : # endif
172 : #endif
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