task2_signal\task2_signal
............\task2_signal.c
......timer\task2_timer
...........\task2_timer.c
....3_evdev\task3_evdev
...........\task3_evdev.c
......mousedev\task3_mousedev
..............\task3_mousedev.c
task2_signal
task2_timer
task3_evdev
task3_mousedev