#include <stdio.h>
#include <dirent.h>
#include <errno.h>

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

DIR *opendir_carefully(const char *dir_name)
{
  DIR *dir;
  if((dir = opendir(dir_name)) == NULL) {
    perror("Can't open directory");
    exit(-1);
  }
  return dir;
}

void recurse_dir(const char *dir_name)
{
  DIR *dir;
  struct dirent *entry;
  char old_dir_path[1024], dir_name_buf[1024];

  // need to save old path...
  if (getcwd(old_dir_path, 1024) != old_dir_path) {
    perror("Current path way too long");
    exit(-1);
  }
  chdir(dir_name);
  dir = opendir_carefully(".");

  while((entry = readdir(dir)) != NULL) {
    printf("(%s)/(%s)/%s\n",old_dir_path,dir_name,entry->d_name);

    if ((entry->d_type == DT_DIR)
    &&  strcmp(entry->d_name, ".")
    &&  strcmp(entry->d_name, "..")) {
    	// first save our state and close current dir
    	off_t dir_offset = telldir(dir);
    	closedir(dir);

	if (strlen(entry->d_name) >= 1024) {
	    perror("Directory entry way too long");
	    exit(-1);
	}
	strcpy(dir_name_buf, entry->d_name);
	recurse_dir(dir_name_buf);

	// reopen dir and restore our state
	dir = opendir_carefully(".");
	seekdir(dir, dir_offset);
    }
  }

  closedir(dir);
  chdir(old_dir_path);
}

int main(int argc, char **argv)
{
	recurse_dir(".");
}