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      1 /*
      2  * Copyright (C) 2008 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 <stdio.h>
     18 #include <stdlib.h>
     19 #include <unistd.h>
     20 #include <string.h>
     21 #include <signal.h>
     22 #include <errno.h>
     23 #include <fcntl.h>
     24 #include <stdlib.h>
     25 #include <poll.h>
     26 
     27 #include <sys/select.h>
     28 #include <sys/time.h>
     29 #include <sys/types.h>
     30 #include <sys/un.h>
     31 
     32 #include "android/os/IVold.h"
     33 
     34 #include <android-base/logging.h>
     35 #include <android-base/stringprintf.h>
     36 #include <binder/IServiceManager.h>
     37 #include <binder/Status.h>
     38 
     39 #include <private/android_filesystem_config.h>
     40 
     41 static void usage(char *progname);
     42 
     43 static android::sp<android::IBinder> getServiceAggressive() {
     44     android::sp<android::IBinder> res;
     45     auto sm = android::defaultServiceManager();
     46     auto name = android::String16("vold");
     47     for (int i = 0; i < 5000; i++) {
     48         res = sm->checkService(name);
     49         if (res) {
     50             LOG(VERBOSE) << "Waited " << (i * 10) << "ms for vold";
     51             break;
     52         }
     53         usleep(10000); // 10ms
     54     }
     55     return res;
     56 }
     57 
     58 static void checkStatus(android::binder::Status status) {
     59     if (status.isOk()) return;
     60     LOG(ERROR) << "Failed: " << status.toString8().string();
     61     exit(ENOTTY);
     62 }
     63 
     64 int main(int argc, char** argv) {
     65     setenv("ANDROID_LOG_TAGS", "*:v", 1);
     66     if (getppid() == 1) {
     67         // If init is calling us then it's during boot and we should log to kmsg
     68         android::base::InitLogging(argv, &android::base::KernelLogger);
     69     } else {
     70         android::base::InitLogging(argv, &android::base::StderrLogger);
     71     }
     72     std::vector<std::string> args(argv + 1, argv + argc);
     73 
     74     if (args.size() > 0 && args[0] == "--wait") {
     75         // Just ignore the --wait flag
     76         args.erase(args.begin());
     77     }
     78 
     79     if (args.size() < 2) {
     80         usage(argv[0]);
     81         exit(5);
     82     }
     83     android::sp<android::IBinder> binder = getServiceAggressive();
     84     if (!binder) {
     85         LOG(ERROR) << "Failed to obtain vold Binder";
     86         exit(EINVAL);
     87     }
     88     auto vold = android::interface_cast<android::os::IVold>(binder);
     89 
     90     if (args[0] == "cryptfs" && args[1] == "enablefilecrypto") {
     91         checkStatus(vold->fbeEnable());
     92     } else if (args[0] == "cryptfs" && args[1] == "init_user0") {
     93         checkStatus(vold->initUser0());
     94     } else if (args[0] == "cryptfs" && args[1] == "enablecrypto") {
     95         int passwordType = android::os::IVold::PASSWORD_TYPE_DEFAULT;
     96         int encryptionFlags = android::os::IVold::ENCRYPTION_FLAG_NO_UI;
     97         checkStatus(vold->fdeEnable(passwordType, "", encryptionFlags));
     98     } else if (args[0] == "cryptfs" && args[1] == "mountdefaultencrypted") {
     99         checkStatus(vold->mountDefaultEncrypted());
    100     } else if (args[0] == "volume" && args[1] == "shutdown") {
    101         checkStatus(vold->shutdown());
    102     } else if (args[0] == "cryptfs" && args[1] == "checkEncryption" && args.size() == 3) {
    103         checkStatus(vold->checkEncryption(args[2]));
    104     } else if (args[0] == "cryptfs" && args[1] == "mountFstab" && args.size() == 3) {
    105         checkStatus(vold->mountFstab(args[2]));
    106     } else if (args[0] == "cryptfs" && args[1] == "encryptFstab" && args.size() == 3) {
    107         checkStatus(vold->encryptFstab(args[2]));
    108     } else {
    109         LOG(ERROR) << "Raw commands are no longer supported";
    110         exit(EINVAL);
    111     }
    112     return 0;
    113 }
    114 
    115 static void usage(char *progname) {
    116     LOG(INFO) << "Usage: " << progname << " [--wait] <system> <subcommand> [args...]";
    117 }
    118