#include <stdio.h>
#include <unistd.h>
#include <signal.h>
#include <string.h>
#include <sys/time.h>
#include <errno.h>
void PrintMsg(int Num)
{
printf("%s\n", "Hello World");
return;
}
int main(int argc, char* argv[])
{
signal(SIGALRM, PrintMsg);
struct itimerval tick;
tick.it_value.tv_sec = 10; //十秒鐘后將啟動定時器
tick.it_value.tv_usec = 0;
tick.it_interval.tv_sec =1; //定時器啟動后，每隔1秒將執行相應的函數
tick.it_interval.tv_usec = 0;
//setitimer將觸發SIGALRM信號
int ret = setitimer(ITIMER_REAL, &tick, NULL);
if ( ret != 0)
{
printf("Set timer error. %s \n", strerror(errno) );
return -1;
}
printf("Wait!\n");
getchar();
return 0;
}