content: package com.termux.shared.android;
  
  import android.app.ActivityManager;
  import android.content.Context;
  
  import androidx.annotation.NonNull;
  import androidx.annotation.Nullable;
  
  import com.termux.shared.logger.Logger;
  
  import java.util.List;
  
  public class ProcessUtils {
  
      public static final String LOG_TAG = "ProcessUtils";
  
      /**
       * Get the app process name for a pid with a call to {@link ActivityManager#getRunningAppProcesses()}.
       *
       * This will not return child process names. Android did not keep track of them before android 12
       * phantom process addition, but there is no API via IActivityManager to get them.
       *
       * To get process name for pids of own app's child processes, check `get_process_name_from_cmdline()`
       * in `local-socket.cpp`.
       *
       * https://cs.android.com/android/platform/superproject/+/android-12.0.0_r32:frameworks/base/core/java/android/app/ActivityManager.java;l=3362
       * https://cs.android.com/android/platform/superproject/+/android-12.0.0_r32:frameworks/base/services/core/java/com/android/server/am/ActivityManagerService.java;l=8434
       * https://cs.android.com/android/_/android/platform/frameworks/base/+/refs/tags/android-12.0.0_r32:services/core/java/com/android/server/am/PhantomProcessList.java
       * https://cs.android.com/android/_/android/platform/frameworks/base/+/refs/tags/android-12.0.0_r32:services/core/java/com/android/server/am/PhantomProcessRecord.java
       *
       * @param context The {@link Context} for operations.
       * @param pid The pid of the process.
       * @return Returns the app process name if found, otherwise {@code null}.
       */
      @Nullable
      public static String getAppProcessNameForPid(@NonNull Context context, int pid) {
          if (pid < 0) return null;
  
          ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
          if (activityManager == null) return null;
          try {
              List<ActivityManager.RunningAppProcessInfo> runningApps = activityManager.getRunningAppProcesses();
              if (runningApps == null) {
                  return null;
              }
              for (ActivityManager.RunningAppProcessInfo procInfo : runningApps) {
                  if (procInfo.pid == pid) {
                      return procInfo.processName;
                  }
              }
          } catch (Exception e) {
              Logger.logStackTraceWithMessage(LOG_TAG, "Failed to get app process name for pid " + pid, e);
          }
  
          return null;
      }
  
  }
  