forkExample.c

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

int main(int argc, char**argv) {

    printf("Parent process: before fork getpid result: %d\n", getpid());
    sleep(5);
    pid_t pid = fork();

    // error occured
    if (pid == -1)
        return EXIT_FAILURE;

    // executing child process
    if (pid == 0){
        char* args[]  = {"./execExample", "Arg1", "Arg2", NULL};
        execv(args[0], args);
    }

    // executing parent process
    else {
        printf("Parent process: getpid result: %d\n", getpid());
        int status;
        pid_t childPID = wait(&status);
        printf("Parent process: wait return: %d, status changes to: %d, and status value is: %d", (int)childPID, status, WEXITSTATUS(status));
        return EXIT_SUCCESS;
    }
}