fork test

#include "stdio.h"
#include "unistd.h"

int main(void)
{
    int st = 0;

    while (1)
    {
        if (fork() == 0)
        {
            usleep(10);
            break;
        }
        else
        {
            ++st;
            usleep(100);
        }
    }
    printf("step=%d, pid=%d\n", st, getpid());

    return 0;
}