cmdfl            2092 src/simh/sim_console.c int cmdfl,runfl;                                         /* TTY flags */
cmdfl            2096 src/simh/sim_console.c cmdfl = fcntl (0, F_GETFL, 0);                           /* get old flags  and status */
cmdfl            2097 src/simh/sim_console.c runfl = cmdfl | FNDELAY;
cmdfl            2138 src/simh/sim_console.c (void)fcntl (0, F_SETFL, cmdfl);                         /* block mode */