void launch_program(StringArray *args) {
    pid_t child = 0;

    child = fork();

    if (child == 0) {
        if (execvp(args->array[0], args->array) == -1) {
            fprintf(stderr, "%s: command not found\n", args->array[0]);
            free_string_array(args);
            exit(EXIT_FAILURE);
        }
    }
    else if (child < 0) {
        perror("fork");
    }
    else {
        int child_status;
        waitpid(child, &child_status, 0);
    }
}