1/*
2 * Copyright (C) 2016 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#define LOG_TAG "ShellCallback"
18
19#include <unistd.h>
20#include <fcntl.h>
21
22#include <binder/IShellCallback.h>
23
24#include <utils/Log.h>
25#include <binder/Parcel.h>
26#include <utils/String8.h>
27
28#include <private/binder/Static.h>
29
30namespace android {
31
32// ----------------------------------------------------------------------
33
34class BpShellCallback : public BpInterface<IShellCallback>
35{
36public:
37    explicit BpShellCallback(const sp<IBinder>& impl)
38        : BpInterface<IShellCallback>(impl)
39    {
40    }
41
42    virtual int openOutputFile(const String16& path, const String16& seLinuxContext) {
43        Parcel data, reply;
44        data.writeInterfaceToken(IShellCallback::getInterfaceDescriptor());
45        data.writeString16(path);
46        data.writeString16(seLinuxContext);
47        remote()->transact(OP_OPEN_OUTPUT_FILE, data, &reply, 0);
48        reply.readExceptionCode();
49        int fd = reply.readParcelFileDescriptor();
50        return fd >= 0 ? fcntl(fd, F_DUPFD_CLOEXEC, 0) : fd;
51
52    }
53};
54
55IMPLEMENT_META_INTERFACE(ShellCallback, "com.android.internal.os.IShellCallback");
56
57// ----------------------------------------------------------------------
58
59status_t BnShellCallback::onTransact(
60    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
61{
62    switch(code) {
63        case OP_OPEN_OUTPUT_FILE: {
64            CHECK_INTERFACE(IShellCallback, data, reply);
65            String16 path(data.readString16());
66            String16 seLinuxContext(data.readString16());
67            int fd = openOutputFile(path, seLinuxContext);
68            if (reply != NULL) {
69                reply->writeNoException();
70                if (fd >= 0) {
71                    reply->writeInt32(1);
72                    reply->writeParcelFileDescriptor(fd, true);
73                } else {
74                    reply->writeInt32(0);
75                }
76            } else if (fd >= 0) {
77                close(fd);
78            }
79            return NO_ERROR;
80        } break;
81        default:
82            return BBinder::onTransact(code, data, reply, flags);
83    }
84}
85
86}; // namespace android
87