8

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

int usr1AmountSend = 0;
int usr2AmountSend = 0;
int usr1AmountAccept = 0;
int usr2AmountAccept = 0;
int currProc;

void termProc(int sig){
    printf("(%d) PID - %d (PPID - %d) finished work after %d signal SIGUSR1 and %d signal SIGUSR2\n",
            currProc, getpid(), getppid(), usr1AmountSend,
            usr2AmountSend);

    for (;;) {
        pid_t childPid = wait(NULL);
        if (childPid == -1) {exit(EXIT_SUCCESS);}
    }
}

void usr1Proc(int sig){usr1AmountAccept++;}
void usr2Proc(int sig){usr2AmountAccept++;}

int main(){
    signal(SIGTERM, termProc);
    signal(SIGUSR1, usr1Proc);
    signal(SIGUSR2, usr2Proc);

    currProc = 1; // process #1
    pid_t pid = fork(); // process #2
    if (pid == 0){
        currProc = 2; // process #2
        pid = fork(); // process #3
        if (pid == 0){
            currProc = 3; // process #3
            pid = fork(); // process #7
            if (pid == 0){currProc = 7;} // process #7
        } else {
            pid = fork(); // process #4
            if (pid == 0){
                currProc = 4; // process #4
                pid = fork(); // process #6
                if (pid == 0){currProc = 6;} // process #6
            } else {
                pid = fork(); // process #5
                if (pid == 0){
                    currProc = 5; // process #5
                    pid = fork(); // process #8
                    if (pid == 0){currProc = 8;} // process #8
                }
            }
        }
    }

    sleep(3);

    for (int i = 0; i < 101; i++){
        if (currProc == 1 || currProc == 8)
        {
            usr2AmountSend++;
            kill(0, SIGUSR2);
        } else {
            usr1AmountSend++;
            kill(0, SIGUSR1);
        }

        struct timeval currentTime;
        gettimeofday(&currentTime, NULL);
        char buffer[80];
        strftime(buffer, sizeof(buffer), "%H:%M:%S",
                 localtime(&currentTime.tv_sec));
        sprintf(buffer, "%s.%06ld", buffer, currentTime.tv_usec);

        printf("[%s] %d process (PID - %d|PPID - %d) send/accept USR1 (%d / %d) and USR2 (%d / %d)\n\n",
                buffer, currProc, getpid(), getppid(), usr1AmountSend, usr1AmountAccept, usr2AmountSend, usr2AmountAccept);
    }
    kill(0, SIGTERM);

    return 0;
}