1 /*
2 * Copyright (C) 2019 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 "WaitCommand.h"
18
19 #include "Lshal.h"
20
21 #include <hidl/ServiceManagement.h>
22 #include <hidl-util/FQName.h>
23
24 namespace android {
25 namespace lshal {
26
getName() const27 std::string WaitCommand::getName() const {
28 return "wait";
29 }
30
getSimpleDescription() const31 std::string WaitCommand::getSimpleDescription() const {
32 return "Wait for HAL to start if it is not already started.";
33 }
34
parseArgs(const Arg & arg)35 Status WaitCommand::parseArgs(const Arg &arg) {
36 if (optind + 1 != arg.argc) {
37 return USAGE;
38 }
39
40 mInterfaceName = arg.argv[optind];
41 ++optind;
42 return OK;
43 }
44
main(const Arg & arg)45 Status WaitCommand::main(const Arg &arg) {
46 Status status = parseArgs(arg);
47 if (status != OK) {
48 return status;
49 }
50
51 auto [interface, instance] = splitFirst(mInterfaceName, '/');
52 instance = instance.empty() ? "default" : instance;
53
54 FQName fqName;
55 if (!FQName::parse(interface, &fqName) || fqName.isIdentifier() || !fqName.isFullyQualified()) {
56 mLshal.err() << "Invalid fully-qualified name '" << interface << "'\n\n";
57 return USAGE;
58 }
59
60 using android::hidl::manager::V1_0::IServiceManager;
61
62 using android::hardware::details::getRawServiceInternal;
63 auto service = getRawServiceInternal(interface, instance, true /*retry*/, false /*getStub*/);
64
65 if (service == nullptr) {
66 mLshal.err() << "Service not found (missing permissions or not in VINTF manifest?).\n";
67 return NO_INTERFACE;
68 }
69
70 return OK;
71 }
72
usage() const73 void WaitCommand::usage() const {
74 static const std::string debug =
75 "wait:\n"
76 " lshal wait <interface/instance> \n"
77 " For a HAL that is on the device, wait for the HAL to start.\n"
78 " This will not start a HAL unless it is configured as a lazy HAL.\n"
79 " <interface>: Format is `android.hardware.foo@1.0::IFoo/default`.\n"
80 " If instance name is missing `default` is used.\n";
81
82 mLshal.err() << debug;
83 }
84
85 } // namespace lshal
86 } // namespace android
87
88