# stdin, bytes written: 18
#> 73 68 6f 77 20 63 6c 6f 63 6b 0d 0a 65 78 69 74 0d 0a                                           | show clock..exit..  =======>additional period send from stdin_data
# io3 mloop, cin: 0, cout: 1, cerr: 0
# io3 fast, cin: 0, cout: 1, cerr: 0
Pseudo-terminal will not be allocated because stdin is not a terminal.