/// <summary>
/// Gets the process information for a given process
/// </summary>
/// <param name="pid">The PID (process ID) of the process</param>
/// <returns>
/// Returns a valid proc_taskallinfo struct for valid processes that the caller
/// has permission to access; otherwise, returns null
/// </returns>
internal static unsafe proc_taskallinfo?GetProcessInfoById(int pid)
{
// Negative PIDs are invalid
if (pid < 0)
{
throw new ArgumentOutOfRangeException(nameof(pid));
}
// Get the process information for the specified pid
int size = sizeof(proc_taskallinfo);
proc_taskallinfo info = default(proc_taskallinfo);
int result = proc_pidinfo(pid, PROC_PIDTASKALLINFO, 0, &info, size);
return(result == size ? new proc_taskallinfo?(info) : null);
}
private static unsafe extern int proc_pidinfo(
int pid,
int flavor,
ulong arg,
proc_taskallinfo* buffer,
int bufferSize);