def start_time(pid):
 if ((not isinstance(pid, int)) or (pid < 0)):
  return None
 if stem.util.proc.is_available():
  try:
   return float(stem.util.proc.stats(pid, stem.util.proc.Stat.START_TIME)[0])
  except IOError:
   pass
 try:
  ps_results = call(('ps -p %s -o etime' % pid), [])
  if (len(ps_results) >= 2):
   etime = ps_results[1].strip()
   return (time.time() - stem.util.str_tools.parse_short_time_label(etime))
 except:
  pass
 return None

def start_time ( pid ) : if ( ( not isinstance ( pid , int ) ) or ( pid < 0 ) ) : return None if stem . util . proc . is_available ( ) : try : return float ( stem . util . proc . stats ( pid , stem . util . proc . Stat . START_TIME ) [ 0 ] ) except IOError : pass try : ps_results = call ( ( 'ps -p %s -o etime' % pid ) , [ ] ) if ( len ( ps_results ) >= 2 ) : etime = ps_results [ 1 ] . strip ( ) return ( time . time ( ) - stem . util . str_tools . parse_short_time_label ( etime ) ) except : pass return None
provides the unix timestamp when the given process started .