8 6var

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


#define createProc(parent, child) \
    if (currProc == parent) {     \
        pid##child = fork();      \
        if (pid##child == 0) {    \
            pid##child = getpid();\
            currProc = child;     \
        }                         \
    }

int currProc;
int sendCount_1, sendCount_2;
int receiveCount_1, receiveCount_2;
pid_t pid1, pid2, pid3, pid4, pid5, pid6, pid7, pid8;

void USR1_handler(int sig) {
    receiveCount_1++;
}

void USR2_handler(int sig) {
    receiveCount_2++;
}

void SIGTERM_handler(int sig) {
    printf("\n\nПроцесс: %d, pid: %d, ppid: %d остановился. Отправил %d usr1 и %d usr2\n\n", currProc, getpid(), getppid(), sendCount_1, sendCount_2);
    if (currProc != 1) {
        kill(getpid(), SIGKILL);
    }
    else {
        pid_t childPid = 0;
        while (childPid != -1) {
            childPid = wait(NULL);
        }
        exit(0);
    }
}

void printStat() {
    if (currProc == 1 || currProc == 5 || currProc == 6 || currProc == 7 || currProc == 8) {
        printf("\nПроцесс: %d, pid: %d, ppid: %d. Отправил %d USR1 и получил %d USR1. Time: %d", currProc, getpid(), getppid(), sendCount_1, receiveCount_1, time(NULL));
    }
    else if (currProc == 2) {
        printf("\nПроцесс: %d, pid: %d, ppid: %d. Отправил %d USR2 и получил %d USR1. Time: %d", currProc, getpid(), getppid(), sendCount_2, receiveCount_1, time(NULL));
    }
    else if (currProc == 3 || currProc == 4) {
        printf("\nПроцесс: %d, pid: %d, ppid: %d. Отправил %d USR1 и получил %d USR2. Time: %d", currProc, getpid(), getppid(), sendCount_1, receiveCount_2, time(NULL));
    }
}

void send(int proc, int sig, int groupId, int* counter) {
    if (currProc == proc) {
        while (*counter != 101) {
            kill(groupId, sig);
            (*counter)++;
            printStat();
        }
        printf("\n\nПроцесс: %d, pid: %d, ppid: %d остановился. Отправил %d usr1 и %d usr2\n\n", currProc, getpid(), getppid(), sendCount_1, sendCount_2);
        kill(groupId, SIGTERM);
        exit(0);
    }
}

int main() {
    signal(SIGUSR1, USR1_handler);
    signal(SIGUSR2, USR2_handler);
    signal(SIGTERM, SIGTERM_handler);

    createProc(0, 1);
    createProc(1, 2);
    createProc(2, 3);
    createProc(2, 4);
    createProc(4, 5);
    createProc(3, 6);
    createProc(6, 7);
    createProc(7, 8);

    sleep(1);

    if (currProc == 2) {
        setpgid(pid3, pid3);
        setpgid(pid4, pid3);
    }

    sleep(1);

    send(1, SIGUSR1, pid2, &sendCount_1);
    send(2, SIGUSR2, pid3, &sendCount_2);
    send(4, SIGUSR1, pid5, &sendCount_1);
    send(3, SIGUSR1, pid6, &sendCount_1);
    send(6, SIGUSR1, pid7, &sendCount_1);
    send(7, SIGUSR1, pid8, &sendCount_1);
    send(8, SIGUSR1, pid1, &sendCount_1);
}