#include <stdio.h>
#include <unistd.h>

int main(void) {
    unsigned long tick = 0;
    printf("[app-b] started pid=%ld\n", (long)getpid());
    fflush(stdout);

    for (;;) {
        printf("[app-b] heartbeat=%lu pid=%ld\n", tick++, (long)getpid());
        fflush(stdout);
        sleep(2);
    }
}