1 : /* Checking macros for fcntl functions.
2 : Copyright (C) 2007 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, write to the Free
17 : Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18 : 02111-1307 USA. */
19 :
20 : #ifndef _FCNTL_H
21 : # error "Never include <bits/fcntl2.h> directly; use <fcntl.h> instead."
22 : #endif
23 :
24 : /* Check that calls to open and openat with O_CREAT set have an
25 : appropriate third/fourth parameter. */
26 : #ifndef __USE_FILE_OFFSET64
27 : extern int __open_2 (__const char *__path, int __oflag) __nonnull ((1));
28 : extern int __REDIRECT (__open_alias, (__const char *__path, int __oflag, ...),
29 : open) __nonnull ((1));
30 : #else
31 : extern int __REDIRECT (__open_2, (__const char *__path, int __oflag),
32 : __open64_2) __nonnull ((1));
33 : extern int __REDIRECT (__open_alias, (__const char *__path, int __oflag, ...),
34 : open64) __nonnull ((1));
35 : #endif
36 : __errordecl (__open_too_many_args,
37 : "open can be called either with 2 or 3 arguments, not more");
38 : __errordecl (__open_missing_mode,
39 : "open with O_CREAT in second argument needs 3 arguments");
40 :
41 : __extern_always_inline int
42 : open (__const char *__path, int __oflag, ...)
43 : {
44 18398 : if (__va_arg_pack_len () > 1)
45 0 : __open_too_many_args ();
46 :
47 18398 : if (__builtin_constant_p (__oflag))
48 : {
49 18398 : if ((__oflag & O_CREAT) != 0 && __va_arg_pack_len () < 1)
50 : {
51 0 : __open_missing_mode ();
52 0 : return __open_2 (__path, __oflag);
53 : }
54 18398 : return __open_alias (__path, __oflag, __va_arg_pack ());
55 : }
56 :
57 0 : if (__va_arg_pack_len () < 1)
58 0 : return __open_2 (__path, __oflag);
59 :
60 0 : return __open_alias (__path, __oflag, __va_arg_pack ());
61 : }
62 :
63 :
64 : #ifdef __USE_LARGEFILE64
65 : extern int __open64_2 (__const char *__path, int __oflag) __nonnull ((1));
66 : extern int __REDIRECT (__open64_alias, (__const char *__path, int __oflag,
67 : ...), open64) __nonnull ((1));
68 : __errordecl (__open64_too_many_args,
69 : "open64 can be called either with 2 or 3 arguments, not more");
70 : __errordecl (__open64_missing_mode,
71 : "open64 with O_CREAT in second argument needs 3 arguments");
72 :
73 : __extern_always_inline int
74 : open64 (__const char *__path, int __oflag, ...)
75 : {
76 : if (__va_arg_pack_len () > 1)
77 : __open64_too_many_args ();
78 :
79 : if (__builtin_constant_p (__oflag))
80 : {
81 : if ((__oflag & O_CREAT) != 0 && __va_arg_pack_len () < 1)
82 : {
83 : __open64_missing_mode ();
84 : return __open64_2 (__path, __oflag);
85 : }
86 : return __open64_alias (__path, __oflag, __va_arg_pack ());
87 : }
88 :
89 : if (__va_arg_pack_len () < 1)
90 : return __open64_2 (__path, __oflag);
91 :
92 : return __open64_alias (__path, __oflag, __va_arg_pack ());
93 : }
94 : #endif
95 :
96 :
97 : #ifdef __USE_ATFILE
98 : # ifndef __USE_FILE_OFFSET64
99 : extern int __openat_2 (int __fd, __const char *__path, int __oflag)
100 : __nonnull ((2));
101 : extern int __REDIRECT (__openat_alias, (int __fd, __const char *__path,
102 : int __oflag, ...), openat)
103 : __nonnull ((2));
104 : # else
105 : extern int __REDIRECT (__openat_2, (int __fd, __const char *__path,
106 : int __oflag), __openat64_2)
107 : __nonnull ((2));
108 : extern int __REDIRECT (__openat_alias, (int __fd, __const char *__path,
109 : int __oflag, ...), openat64)
110 : __nonnull ((2));
111 : # endif
112 : __errordecl (__openat_too_many_args,
113 : "openat can be called either with 3 or 4 arguments, not more");
114 : __errordecl (__openat_missing_mode,
115 : "openat with O_CREAT in third argument needs 4 arguments");
116 :
117 : __extern_always_inline int
118 : openat (int __fd, __const char *__path, int __oflag, ...)
119 : {
120 : if (__va_arg_pack_len () > 1)
121 : __openat_too_many_args ();
122 :
123 : if (__builtin_constant_p (__oflag))
124 : {
125 : if ((__oflag & O_CREAT) != 0 && __va_arg_pack_len () < 1)
126 : {
127 : __openat_missing_mode ();
128 : return __openat_2 (__fd, __path, __oflag);
129 : }
130 : return __openat_alias (__fd, __path, __oflag, __va_arg_pack ());
131 : }
132 :
133 : if (__va_arg_pack_len () < 1)
134 : return __openat_2 (__fd, __path, __oflag);
135 :
136 : return __openat_alias (__fd, __path, __oflag, __va_arg_pack ());
137 : }
138 :
139 :
140 : # ifdef __USE_LARGEFILE64
141 : extern int __openat64_2 (int __fd, __const char *__path, int __oflag)
142 : __nonnull ((2));
143 : extern int __REDIRECT (__openat64_alias, (int __fd, __const char *__path,
144 : int __oflag, ...), openat64)
145 : __nonnull ((2));
146 : __errordecl (__openat64_too_many_args,
147 : "openat64 can be called either with 3 or 4 arguments, not more");
148 : __errordecl (__openat64_missing_mode,
149 : "openat64 with O_CREAT in third argument needs 4 arguments");
150 :
151 : __extern_always_inline int
152 : openat64 (int __fd, __const char *__path, int __oflag, ...)
153 : {
154 : if (__va_arg_pack_len () > 1)
155 : __openat64_too_many_args ();
156 :
157 : if (__builtin_constant_p (__oflag))
158 : {
159 : if ((__oflag & O_CREAT) != 0 && __va_arg_pack_len () < 1)
160 : {
161 : __openat64_missing_mode ();
162 : return __openat64_2 (__fd, __path, __oflag);
163 : }
164 : return __openat64_alias (__fd, __path, __oflag, __va_arg_pack ());
165 : }
166 :
167 : if (__va_arg_pack_len () < 1)
168 : return __openat64_2 (__fd, __path, __oflag);
169 :
170 : return __openat64_alias (__fd, __path, __oflag, __va_arg_pack ());
171 : }
172 : # endif
173 : #endif
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