1 /*
2 * Copyright (C) 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 #include "berberis/kernel_api/open_emulation.h"
18
19 #include <fcntl.h>
20
21 #include "berberis/kernel_api/main_executable_real_path_emulation.h"
22
23 namespace berberis {
24
OpenatForGuest(int dirfd,const char * path,int guest_flags,mode_t mode)25 int OpenatForGuest(int dirfd, const char* path, int guest_flags, mode_t mode) {
26 int host_flags = ToHostOpenFlags(guest_flags);
27
28 const char* real_path = nullptr;
29 if ((host_flags & AT_SYMLINK_NOFOLLOW) == 0) {
30 real_path = TryReadLinkToMainExecutableRealPath(path);
31 }
32
33 return openat(dirfd, real_path ? real_path : path, host_flags, mode);
34 }
35
OpenForGuest(const char * path,int flags,mode_t mode)36 int OpenForGuest(const char* path, int flags, mode_t mode) {
37 return OpenatForGuest(AT_FDCWD, path, flags, mode);
38 }
39
40 } // namespace berberis
41