Recursive Directory Listings in Unix

I'm writing a program that will recursively list the files and directories in the corresponding subdirectories.  Basically, it would list everything in root, then for every directory it finds, it would indent and list everything in that directory.  This would take place for every directory/subdirectory found.  

Below is the code I've been working on.  It works when I manually enter a directory name, however I need this to search automatically.  Can anyone help me out

#include <sys/types.h> /* for opendir(), readdir(), closedir() */
#include <dirent.h>
#include <unistd.h>
#include <sys/stat.h> /* for stat() */
#include <stdio.h>
#include <string.h>
int main( int argc, char *argv[])
{
  DIR *dirfp;
  struct dirent *de;
  struct stat stat_buf;
  int is_dir;
  char *d = ".";
  char *name;
  name = getcwd(NULL,64);
  name = strcat( name,"/");
  name = strcat( name,d);
  if( argc > 2)
  {
    fprintf( stderr, "Usage: %s [dirname]\n", argv[0]);
    return 1;
  }
  if( argc > 1)
  {
    d = argv[1];
    name = strcat( name,"/");
    name = strcat( name,d);
    printf("name = %s\n", name);
  }  
  if( (dirfp = opendir( name)) == NULL)
  {
   perror(d);
   return 1;
  }
  while( (de = readdir( dirfp)) != NULL)
  {
    is_dir = 0;
/*
   if( stat( de->d_name, &stat_buf) < 0)
    {    
      printf("No directory found.\n");
      printf("opening de->d_name = %s\n", de->d_name);
      perror( de->d_name);
    }    
    else
    {
*/
   /* Removes the . and .. directories from the list */
    if (strcmp (de->d_name, ".") != 0 && strcmp(de->d_name, "..") != 0)
      {
        stat( de->d_name, &stat_buf);
        is_dir = S_ISDIR( stat_buf.st_mode);
        printf( "%s%s\n", de->d_name, is_dir ? " (d)" : "");
      }
/*     }  */  
   }
  closedir( dirfp);
  return 0;
}