#include <u.h>#include <libc.h> voidding(void*, char *s){	if(strstr(s, "alarm"))		noted(NCONT);	else		noted(NDFLT);} voidmain(void){	char buf[256]; 	alarm(100);	while(read(0, buf, sizeof(buf)) > 0)		;	alarm(0);	exits(0);}