FUSE example

  #define FUSE_USE_VERSION  26

  #include <fuse.h>
  #include <stdio.h>
  #include <string.h>
  #include <errno.h>
  #include <fcntl.h>

  static const char *hello_str = "Hello World!\n";
  static const char *hello_path = "/hello";

  static int hello_getattr(const char *path, struct stat *stbuf)
  {
      int res = 0;
      memset(stbuf, 0, sizeof(struct stat));
      if(strcmp(path, "/") == 0) {
          stbuf->st_mode = S_IFDIR | 0755;
          stbuf->st_nlink = 2;
      }
      else if(strcmp(path, hello_path) == 0) {
          stbuf->st_mode = S_IFREG | 0444;
          stbuf->st_nlink = 1;
          stbuf->st_size = strlen(hello_str);
      }
      else
          res = -ENOENT;

      return res;
  }

  static int hello_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
                           off_t offset, struct fuse_file_info *fi)
  {
      (void) offset;
      (void) fi;

      if(strcmp(path, "/") != 0)
          return -ENOENT;

      filler(buf, ".", NULL, 0);
      filler(buf, "..", NULL, 0);
      filler(buf, hello_path   1, NULL, 0);

      return 0;
  }

  static int hello_open(const char *path, struct fuse_file_info *fi)
  {
      if(strcmp(path, hello_path) != 0)
          return -ENOENT;

      if((fi->flags