int listdir(char *path, char *filelist[])
{
    DIR *dp;
    struct dirent *ep;
    int num = 0;

    /* open directory for reading */
    if ((dp = opendir(path)) != NULL) {
        while ((ep = readdir(dp))) {
            filelist[num] = ep->d_name; /* add entry to file list */
            num++;
        }

        closedir(dp);
    } else {
        perror("Error opening directory");
        return 0;
    }

    return num;
}