BPX1TFW (tcflow) example

The following code resumes data flow (TCION transmits a START character) on the standard input file. For the callable service, see tcflow (BPX1TFW, BPX4TFW) — Suspend or resume data flow on a terminal. For the data structure, see BPXYTIOS — Map the termios structure. AMODE 64 callers use BPX4TFW (tcflow) example.

                                              
         CALL  BPX1TFW,              Suspend or resume data flow       +
               (=A(STDIN_FILENO),    Input: File descriptor            +
               =A(TCION),            Input: Action BPXYTIOS            +
               RETVAL,               Return value: 0 or -1             +
               RETCODE,              Return code                       +
               RSNCODE),             Reason code                       +
               VL,MF=(E,PLIST)       ----------------------------------