1 /*
2 * Copyright 2014, The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #ifndef _FCNTL_PORTABLE_H_
18 #define _FCNTL_PORTABLE_H_
19 #endif
20
21 #include <portability.h>
22 #include <fcntl.h>
23 #include <stdarg.h>
24
25 #define O_DIRECTORY_PORTABLE 040000
26 #define O_NOFOLLOW_PORTABLE 0100000
27 #define O_DIRECT_PORTABLE 0200000
28 #define O_LARGEFILE_PORTABLE 0400000
29
flags_p2n(int p_flags)30 static int flags_p2n(int p_flags)
31 {
32 int machine_flags = p_flags;
33 if (p_flags & O_DIRECTORY_PORTABLE) {
34 machine_flags ^= O_DIRECTORY_PORTABLE;
35 machine_flags |= O_DIRECTORY;
36 }
37 if (p_flags & O_NOFOLLOW_PORTABLE) {
38 machine_flags ^= O_NOFOLLOW_PORTABLE;
39 machine_flags |= O_NOFOLLOW;
40 }
41 if (p_flags & O_DIRECT_PORTABLE) {
42 machine_flags ^= O_DIRECT_PORTABLE;
43 machine_flags |= O_DIRECT;
44 }
45 if (p_flags & O_LARGEFILE_PORTABLE) {
46 machine_flags ^= O_LARGEFILE_PORTABLE;
47 machine_flags |= O_LARGEFILE;
48 }
49
50 return machine_flags;
51 }
52
53 #define FLAGS_VAARGS_TRANSLATE \
54 flags = flags_p2n(flags); \
55 mode_t mode = 0; \
56 if ((flags & O_CREAT) != 0) { \
57 va_list args; \
58 va_start(args, flags); \
59 mode = (mode_t) va_arg(args, int); \
60 va_end(args);\
61 }
62
63
WRAP(openat)64 int WRAP(openat)(int fd, const char* path, int flags, ...)
65 {
66 FLAGS_VAARGS_TRANSLATE
67 return REAL(openat)(fd, path, flags, mode);
68 }
69
WRAP(openat64)70 int WRAP(openat64)(int fd, const char* path, int flags, ...)
71 {
72 FLAGS_VAARGS_TRANSLATE
73 return REAL(openat64)(fd, path, flags, mode);
74 }
75
WRAP(open)76 int WRAP(open)(const char* path, int flags, ...)
77 {
78 FLAGS_VAARGS_TRANSLATE
79 return REAL(open)(path, flags, mode);
80 }
81
WRAP(open64)82 int WRAP(open64)(const char* path, int flags, ...)
83 {
84 FLAGS_VAARGS_TRANSLATE
85 return REAL(open64)(path, flags, mode);
86 }
87