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

void handle_sigint(int sig) {
    // Father ignores SIGINT
    printf("Father process received SIGINT, but ignoring it.\n");
}

void handle_son_termination(int status) {
    if (WIFEXITED(status)) {
        printf("Son terminated with exit status %d.\n", WEXITSTATUS(status));
    } else if (WIFSIGNALED(status)) {
        printf("Son terminated by signal %d.\n", WTERMSIG(status));
    } else {
        printf("Son terminated with unknown status.\n");
    }
}

int main() {
    pid_t pid = fork();

    if (pid == -1) {
        perror("fork failed");
        exit(EXIT_FAILURE);
    } else if (pid == 0) {
        // Son process
        signal(SIGINT, SIG_DFL);  // Allow son process to be terminated by SIGINT

        for (int i = 0; i < 10; ++i) {
            printf("Son PID: %d\n", getpid());
            sleep(1);
        }
        printf("Son terminating after 10 seconds.\n");
        exit(0);
    } else {
        // Father process
        signal(SIGINT, handle_sigint);  // Ignore SIGINT in father

        int status;
        waitpid(pid, &status, 0);  // Wait for son's termination
        handle_son_termination(status);
    }

    return 0;
}