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IGNBRKhas nothing to do with Ctrl-C being translated toSIGINT. It'sISIGinc_lflagwho is controlling that (alsoc_cc[VINTR]can be set to 0 to disable it, or to another char).stty -intris not a valid command. AVINTR/Ctrl-C won't send a signal to the "foreground process", but to the foreground process group (job), ie. when runninga|b|cand pressing ^C, a signal will be sent to thea,bandcprocesses.