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      1 /*
      2  * Copyright (C) 2015 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 "cmd"
     18 
     19 #include <utils/Log.h>
     20 #include <binder/Parcel.h>
     21 #include <binder/ProcessState.h>
     22 #include <binder/IResultReceiver.h>
     23 #include <binder/IServiceManager.h>
     24 #include <binder/TextOutput.h>
     25 #include <utils/Vector.h>
     26 
     27 #include <getopt.h>
     28 #include <stdlib.h>
     29 #include <stdio.h>
     30 #include <string.h>
     31 #include <unistd.h>
     32 #include <sys/time.h>
     33 
     34 using namespace android;
     35 
     36 static int sort_func(const String16* lhs, const String16* rhs)
     37 {
     38     return lhs->compare(*rhs);
     39 }
     40 
     41 class MyResultReceiver : public BnResultReceiver
     42 {
     43 public:
     44     virtual void send(int32_t /*resultCode*/) {
     45     }
     46 };
     47 
     48 int main(int argc, char* const argv[])
     49 {
     50     signal(SIGPIPE, SIG_IGN);
     51     sp<ProcessState> proc = ProcessState::self();
     52     proc->startThreadPool();
     53 
     54     sp<IServiceManager> sm = defaultServiceManager();
     55     fflush(stdout);
     56     if (sm == NULL) {
     57         ALOGE("Unable to get default service manager!");
     58         aerr << "cmd: Unable to get default service manager!" << endl;
     59         return 20;
     60     }
     61 
     62     if (argc == 1) {
     63         aout << "cmd: no service specified; use -l to list all services" << endl;
     64         return 20;
     65     }
     66 
     67     if ((argc == 2) && (strcmp(argv[1], "-l") == 0)) {
     68         Vector<String16> services = sm->listServices();
     69         services.sort(sort_func);
     70         aout << "Currently running services:" << endl;
     71 
     72         for (size_t i=0; i<services.size(); i++) {
     73             sp<IBinder> service = sm->checkService(services[i]);
     74             if (service != NULL) {
     75                 aout << "  " << services[i] << endl;
     76             }
     77         }
     78         return 0;
     79     }
     80 
     81     Vector<String16> args;
     82     for (int i=2; i<argc; i++) {
     83         args.add(String16(argv[i]));
     84     }
     85     String16 cmd = String16(argv[1]);
     86     sp<IBinder> service = sm->checkService(cmd);
     87     if (service == NULL) {
     88         aerr << "Can't find service: " << argv[1] << endl;
     89         return 20;
     90     }
     91 
     92     // TODO: block until a result is returned to MyResultReceiver.
     93     IBinder::shellCommand(service, STDIN_FILENO, STDOUT_FILENO, STDERR_FILENO, args,
     94             new MyResultReceiver());
     95     return 0;
     96 }
     97