test.c

ping程序源代码

#include <stdio.h>
#include <time.h>
#include <sys/time.h>
#include<unistd.h>
#include<sys/types.h>
#include <signal.h>
int count = 0;
void set_timer()
{
        struct itimerval itv, oldtv;
        itv.it_interval.tv_sec = 0;
        itv.it_interval.tv_usec = 10000;
        itv.it_value.tv_sec = 0;
        itv.it_value.tv_usec = 10000;

        setitimer(ITIMER_REAL, &itv, &oldtv);
}

void sigalrm_handler(int sig)
{
        count++;
        printf("timer signal.. %d\n", count);
}

int main()
{
        signal(SIGALRM, sigalrm_handler);
        set_timer();
        while (count < 1000)
        {}
        exit(0);
}