#include <cstdint>
#include <cstring>
#include <string>

#include <unistd.h>
#include <dirent.h>
#include <sys/types.h>
#include <sys/stat.h>

using namespace std;

uint64_t Get_Folder_Size(const string& Path) {
    DIR* d;
    struct dirent* de;
    struct stat st;
    uint64_t dusize = 0;
    string FullPath;

    d = opendir(Path.c_str());
    if (d == NULL) {
        return 0;
    }

    while ((de = readdir(d)) != NULL) {
        if (!strcmp(de->d_name, ".") || !strcmp(de->d_name, ".."))
            continue;
        FullPath = Path + "/";
        FullPath += de->d_name;
        if (lstat(FullPath.c_str(), &st)) {
            continue;
        }
        if ((st.st_mode & S_IFDIR) && de->d_type != DT_SOCK) {
            dusize += Get_Folder_Size(FullPath);
        } else if (st.st_mode & S_IFREG || st.st_mode & S_IFLNK) {
            dusize += (uint64_t)(st.st_size);
        }
    }
    closedir(d);
    return dusize;
}

int main(int argc, char **argv) {
    string arg = argv[1];
    printf("Size : %lu\n", Get_Folder_Size(arg));
}