getch always returns -1 after shell

[jon wackley]

Hi,

I have a problem with ncurses-5.3, I use the following pseudo-code;

  def_prog_mode();
  endwin();
  /* spawn some shell processing */
  refresh();

Everything seems fine until the next execution of getch().  getch always 
returns -1, (ERR).  Is there something special I have to do to ensure 
the input state is consistent before and after spawning shell commands? 
Any suggestions where to look to track down this problem?  The term is a 
"sun-cmd".

Thanks,
jonw