indexes() in server.c

char* indexes(const char* path)
{
    char* html_path = realloc((char*)path, strlen("index.html") + strlen(path) + 1);
    char* php_path = realloc((char*)path, strlen("index.php") + strlen(path) + 1);
    char* index_html = "index.html";
    char* index_php = "index.php";
    if (access(index_html, F_OK) == 0)
    {
        strcpy((char*)path, html_path);
        free(html_path);
        free(php_path);
        return strcat((char*)path, index_html);
    }
    else if (access(index_php, F_OK) == 0)
    {
        strcpy((char*)path, php_path);
        free(html_path);
        free(php_path);
        return strcat((char*)path, index_php);
    }
    free(php_path);
    free(html_path);
    return NULL;
}