block_tty_out_signal  957 src/sysdep.c     block_tty_out_signal (&oldset);
block_tty_out_signal   32 src/syssignal.h extern void block_tty_out_signal (sigset_t *);
block_tty_out_signal 3948 src/term.c           block_tty_out_signal (&oldset);
block_tty_out_signal 4068 src/term.c       block_tty_out_signal (&oldset);