#include <stdio.h>#include <signal.h>#include <sys/types.h>#include <unistd.h>int receivd_signal=0;void catch_ctrl_c(int signo){	printf("signo=%d\n",signo);	receivd_signal=1;}void SetTimer(struct timeval t,void (*funt)()){	sigset_t newmask;	struct sigaction action;	action.sa_handler=funt;	action.sa_flags=0;	if(sigaction(SIGUSR1,&action,NULL)==-1)		perror("can not SIGINT");	for(int i=0;i<7;i++)	{		printf("%d\n",i);		sleep(1);		raise(SIGUSR1);	}}main(){}