new file:   ch10/timer2/Makefile
	new file:   ch10/timer2/a.out
	new file:   ch10/timer2/dayoftime
	new file:   ch10/timer2/dayoftime.c
	new file:   ch10/timer2/main.c
	new file:   ch10/timer2/signal
	new file:   ch10/timer2/signal.c
	modified:   ch10/timer2/timer.c
	modified:   ch10/timer2/timer.h
	new file:   ch10/timer2/timer.h.gch