Recursive directory listing

printdir.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <dirent.h>

void printdir(char * name);

int main(int argc, char *argv[]) {
    printdir(argv[1]);

    return 0;
}
void printdir(char * name) {
    DIR * d;
    struct dirent * entry;
    char buff[256];
    
    memset(buff, '\0', 256);
    strcpy(buff, name);

    d = opendir(name);
    while((entry = readdir(d)) != NULL) {
        if(!strcmp(entry->d_name, ".") || !strcmp(entry->d_name, ".."))
            continue;
        if(entry->d_type == 4) {
              strcat(buff, entry->d_name);
              strcat(buff, "/");
              printf("type: %u, name: %s\n", entry->d_type, buff);
              printdir(buff);
        }
        else {
            strcat(buff, entry->d_name);
            printf("type: %u, name: %s\n", entry->d_type, buff);
        }
        memset(buff, '\0', 256);
        strcpy(buff, name);
    }
    closedir(d);
}