/// <summary>
/// Gets the parent process of specified process.
/// </summary>
/// <param name="id">The process id.</param>
/// <returns>An instance of the Process class.</returns>
public static Process GetParentProcess(this Process process)
{
if (process is null)
{
throw new ArgumentNullException(nameof(process));
}
return(ProcessBasicInformation.GetParentProcess(process.Handle));
}
/// <summary>
/// Gets the parent process of a specified process.
/// </summary>
/// <param name="handle">The process handle.</param>
/// <returns>An instance of the Process class.</returns>
internal static Process GetParentProcess(IntPtr handle)
{
var pbi = new ProcessBasicInformation();
var status = NtQueryInformationProcess(handle, 0, ref pbi, Marshal.SizeOf(pbi), out _);
if (status != 0)
{
throw new Win32Exception(status);
}
try
{
return(Process.GetProcessById(pbi.InheritedFromUniqueProcessId.ToInt32()));
}
catch (ArgumentException)
{
return(null);
}
}
static extern int NtQueryInformationProcess(IntPtr processHandle, int processInformationClass, ref ProcessBasicInformation processInformation, int processInformationLength, out int returnLength);
