int main(int argc, char** argv) {
if (argc == 2) {
if (strcmp(argv[1], "--reboot") == 0) {
reboot_to_recovery();
} else if (strcmp(argv[1], "--clear-bcb") == 0) {
return clear_bcb(STATUS_FILE);
} else if (strcmp(argv[1], "--setup-bcb") == 0) {
return setup_bcb(COMMAND_FILE, STATUS_FILE);
} else if (strcmp(argv[1], "--read-bcb") == 0) {
return read_bcb();
}
} else if (argc == 1 || argc == 3) {
const char* input_path = nullptr;
const char* map_file = CACHE_BLOCK_MAP.c_str();
if (argc == 3) {
input_path = argv[1];
map_file = argv[2];
}
return uncrypt_wrapper(input_path, map_file, STATUS_FILE);
}
usage(argv[0]);
return 2;
}
int main(int argc, char** argv) {
enum { UNCRYPT, SETUP_BCB, CLEAR_BCB, UNCRYPT_DEBUG } action;
const char* input_path = nullptr;
const char* map_file = CACHE_BLOCK_MAP.c_str();
if (argc == 2 && strcmp(argv[1], "--clear-bcb") == 0) {
action = CLEAR_BCB;
} else if (argc == 2 && strcmp(argv[1], "--setup-bcb") == 0) {
action = SETUP_BCB;
} else if (argc == 1) {
action = UNCRYPT;
} else if (argc == 3) {
input_path = argv[1];
map_file = argv[2];
action = UNCRYPT_DEBUG;
} else {
usage(argv[0]);
return 2;
}
if ((fstab = read_fstab()) == nullptr) {
log_uncrypt_error_code(kUncryptFstabReadError);
return 1;
}
if (action == UNCRYPT_DEBUG) {
LOG(INFO) << "uncrypt called in debug mode, skip socket communication";
bool success = uncrypt_wrapper(input_path, map_file, -1);
if (success) {
LOG(INFO) << "uncrypt succeeded";
} else{
LOG(INFO) << "uncrypt failed";
}
return success ? 0 : 1;
}
// c3. The socket is created by init when starting the service. uncrypt
// will use the socket to communicate with its caller.
android::base::unique_fd service_socket(android_get_control_socket(UNCRYPT_SOCKET.c_str()));
if (service_socket == -1) {
PLOG(ERROR) << "failed to open socket \"" << UNCRYPT_SOCKET << "\"";
log_uncrypt_error_code(kUncryptSocketOpenError);
return 1;
}
fcntl(service_socket, F_SETFD, FD_CLOEXEC);
if (listen(service_socket, 1) == -1) {
PLOG(ERROR) << "failed to listen on socket " << service_socket.get();
log_uncrypt_error_code(kUncryptSocketListenError);
return 1;
}
android::base::unique_fd socket_fd(accept4(service_socket, nullptr, nullptr, SOCK_CLOEXEC));
if (socket_fd == -1) {
PLOG(ERROR) << "failed to accept on socket " << service_socket.get();
log_uncrypt_error_code(kUncryptSocketAcceptError);
return 1;
}
bool success = false;
switch (action) {
case UNCRYPT:
success = uncrypt_wrapper(input_path, map_file, socket_fd);
break;
case SETUP_BCB:
success = setup_bcb(socket_fd);
break;
case CLEAR_BCB:
success = clear_bcb(socket_fd);
break;
default: // Should never happen.
LOG(ERROR) << "Invalid uncrypt action code: " << action;
return 1;
}
// c13. Read a 4-byte code from the client before uncrypt exits. This is to
// ensure the client to receive the last status code before the socket gets
// destroyed.
int code;
if (android::base::ReadFully(socket_fd, &code, 4)) {
LOG(INFO) << " received " << code << ", exiting now";
} else {
PLOG(ERROR) << "failed to read the code";
}
return success ? 0 : 1;
}