finding a file in disk with C/C++

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

void crawldir(char *currdir);
void StripFile(char *filename, long filesize);
char tempname[MAXNAMLEN];

int main(int argc, char **argv) {
  if (argc < 2) {
    fprintf(stderr, "Usage: %s startdir\n", argv[0]);
    fprintf(stderr, "E.g. %s /var/www/foo\n", argv[0]);
    fprintf(stderr, "Description:\t This program ... <snip>.\n");
    fprintf(stderr, "\t\t It recursively crawls its way up startdir. \n");
    return 0;
  }
  crawldir(argv[1]);
}

void crawldir(char *currdir)
{
  /* Open the directory */
  DIR *dir;
  struct dirent *de;
  struct stat st;

  chdir (currdir);
  printf("Current dir is %s\n", getwd(tempname));
  dir = opendir(".");
  while (de = readdir(dir)) {
    lstat(de->d_name, &st);
    if (S_ISDIR(st.st_mode)) {
      if ((strcmp(de->d_name, ".") != 0) && (strcmp(de->d_name, "..") != 0)) {
        crawldir(de->d_name); 
      }
    } 
    else {
      StripFile(de->d_name, st.st_size);
    }
  }
  closedir(dir);
  printf("Switching back one dir level\n");
  chdir("..");
}

void StripFile(char *filename, long filesize) {
 ...<snip>... your code comes here
}