unblock_tty_out_signal  959 src/sysdep.c     unblock_tty_out_signal (&oldset);
unblock_tty_out_signal   33 src/syssignal.h extern void unblock_tty_out_signal (sigset_t const *);
unblock_tty_out_signal 3950 src/term.c           unblock_tty_out_signal (&oldset);
unblock_tty_out_signal 4072 src/term.c       unblock_tty_out_signal (&oldset);