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#include <signal.h> //struct sigaction,sigemptyset()
#include <unistd.h> //alarm()
#include <stdio.h> //printf()
#include <stdlib.h> //exit(),system()
volatile int stop = 0;
void sigalrm_handler(int sig)
{
stop = 1;
}
int main()
{
struct sigaction sa;
int num = 0;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
sa.sa_handler = sigalrm_handler;
sigaction(SIGALRM, &sa, NULL);
alarm(60); /* Request SIGALRM in 60 seconds */
while (!stop) {
system("ls -F"); // do something here
num++;
}
printf("%d\n", num);
exit(0);
}
