
  NNAAMMEE

  pid - Retrieve process id(s)

  SSYYNNOOPPSSIISS

  ppiidd?fileId?

  DDEESSCCRRIIPPTTIIOONN

  If the fileId argument is given then it should normally refer to a process
  pipeline created with the _oo_pp_ee_nn command. In this case the ppiidd command will
  return a list whose elements are the process identifiers of all the
  processes in the pipeline, in order. The list will be empty if fileId
  refers to an open file that isn't a process pipeline. If no fileId argument
  is given then ppiidd returns the process identifier of the current process.
  All process identifiers are returned as decimal strings.

  SSEEEE AALLSSOO

  _ee_xx_ee_cc, _oo_pp_ee_nn

  KKEEYYWWOORRDDSS

  _f_i_l_e, _p_i_p_e_l_i_n_e, _p_r_o_c_e_s_s_ _i_d_e_n_t_i_f_i_e_r
  ---------------------------------------------------------------------------

    _C_o_p_y_r_i_g_h_t  1993 The Regents of the University of California.
    _C_o_p_y_r_i_g_h_t  1994-1996 Sun Microsystems, Inc.
    _C_o_p_y_r_i_g_h_t  1995-1997 Roger E. Critchlow Jr.

