#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/wait.h>

volatile int count2 = 0;
volatile int count1 = 0;
volatile int breaks = 0;

void usr2(int sig) {
    ++count2;
}

void usr1(int sig) {
    printf("%d\n", count1);
    fflush(stdout);
    printf("%d\n", count2);
    fflush(stdout);
    ++count1;
}

void process(int sig) {
    breaks = 1;
}

int main() {
    signal(SIGUSR2, usr2);
    signal(SIGUSR1, usr1);
    signal(SIGTERM, process);
    if (breaks) return 0;

    sigset_t s2, s1;
    sigemptyset(&s1);
    sigaddset(&s1, SIGINT);
    sigprocmask(SIG_BLOCK, &s1, &s2);

    while (1) {
        sigsuspend(&s2);
    }
}