C programming - the following program should do the same thing as command du -ah /home

It should be able to print out all of directories, subdirectories, files and the its size. But for some reason, I can't get the size right and been getting 0 size for some directories.

Each directory only print out 4.0K, which is wrong, it should be able to print out the total size.

#include

#include

#include

#include

#include

void listdir(char *name)

{

DIR *dir;

struct dirent *entry;

struct stat buf;

int size = 0;

double size_in_kb;

if(!(dir = opendir(name)))

return;

if (!(entry = readdir(dir)))

return;

while(entry = readdir(dir)){

if(entry->d_type == DT_DIR) {

char path[1024];

int len = snprintf(path, sizeof(path)-1, "%s/%s", name, entry->d_name);

path[len] = 0;

if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0)

continue;

stat(path, &buf);

size= buf.st_size;

size_in_kb = size / 1024;

printf("%3.1fK %s/%s ",size_in_kb, name, entry->d_name);

listdir(path);

}

else{

stat(entry->d_name, &buf);

size= buf.st_size;

size_in_kb = size / 1024;

printf("%3.1fK %s/%s ", size_in_kb ,name, entry->d_name);

}

};

closedir(dir);

}