Disable signals from ^C (and friends)

Allows us to interpret ^C through ^Z as control codes and handle them
properly.

Also fixes resetting termios after ^C

fzy.c

@@ -153,6 +153,10 @@ void run(tty_t *tty, choices_t *choices){
 			strncpy(search, choices_get(choices, choices->selection), SEARCH_SIZE_MAX);
 			search_size = strlen(search);
 			choices_search(choices, search);
+		}else if(ch == 3 || ch == 4){ /* ^C || ^D */
+			clear(tty);
+			tty_close(tty);
+			exit(EXIT_FAILURE);
 		}else if(ch == 10){ /* Enter */
 			clear(tty);
 

tty.c

@@ -33,8 +33,9 @@ void tty_init(tty_t *tty, const char *tty_filename){
 	 * Disable both of
 	 * ICANON  Canonical input (erase and kill processing).
 	 * ECHO    Enable echo.
+	 * ISIG    Disable signals from control characters
 	 */
-	new_termios.c_lflag &= ~(ICANON | ECHO);
+	new_termios.c_lflag &= ~(ICANON | ECHO | ISIG);
 
 	if(tcsetattr(tty->fdin, TCSANOW, &new_termios))
 		perror("tcsetattr");