| /* |
| * Copyright (C) 2021 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| * Copied from device/google/cuttlefish/guest/commands/vport_trigger in Android R |
| * commit hash :69e0935b2929b26c5fc29646eef1d33c39e344f1 |
| * (Migrate vport_trigger's Android.mk to Android.bp) |
| * |
| */ |
| |
| #include <cutils/properties.h> |
| |
| #include <sys/cdefs.h> |
| #include <sys/stat.h> |
| #include <sys/types.h> |
| |
| #include <dirent.h> |
| #include <fcntl.h> |
| #include <unistd.h> |
| |
| #include <cerrno> |
| #include <climits> |
| #include <string> |
| #include "android-base/file.h" |
| #include "android-base/logging.h" |
| |
| int main(int argc __unused, char* argv[] __unused) { |
| const char sysfs_base[] = "/sys/class/virtio-ports/"; |
| DIR* dir = opendir(sysfs_base); |
| |
| if (dir) { |
| dirent* dp; |
| while ((dp = readdir(dir)) != nullptr) { |
| std::string dirname = dp->d_name; |
| std::string sysfs(sysfs_base + dirname + "/name"); |
| struct stat st; |
| if (stat(sysfs.c_str(), &st)) { |
| continue; |
| } |
| std::string content; |
| if (!android::base::ReadFileToString(sysfs, &content, true)) { |
| continue; |
| } |
| if (content.empty()) { |
| continue; |
| } |
| // Removing the last \n character |
| content.erase(content.end() - 1); |
| std::string dev("/dev/" + dirname); |
| std::string propname("vendor.ser." + content); |
| property_set(propname.c_str(), dev.c_str()); |
| } |
| } |
| return 0; |
| } |