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

sig_atomic_t child_exit_status;

void clean_up_child_process(int signal_number)
{
    int status;
    wait(&status);
    child_exit_status = status;
}

int main()
{
    struct sigaction sigchld_action;
    memset(&sigchld_action, 0, sizeof(sigchld_action));
    sigchld_action.sa_handler = &clean_up_child_process;
    sigaction(SIGCHLD, &sigchld_action, NULL);

    pid_t child_pid = fork();
    if (child_pid > 0) {
        printf("Parent process, normal executionn");
        sleep(60);
        printf("After sleepn");
    } else {
        printf("Childn");
    }

    return 0;
}

Parent process, normal execution
Child
After sleep