21 #define FUSE_USE_VERSION 31    23 #include <fuse_lowlevel.h>    32 static const char *hello_str = 
"Hello World!\n";
    33 static const char *hello_name = 
"hello";
    35 static int hello_stat(
fuse_ino_t ino, 
struct stat *stbuf)
    40                 stbuf->st_mode = S_IFDIR | 0755;
    45                 stbuf->st_mode = S_IFREG | 0444;
    47                 stbuf->st_size = strlen(hello_str);
    63         memset(&stbuf, 0, 
sizeof(stbuf));
    64         if (hello_stat(ino, &stbuf) == -1)
    74         if (parent != 1 || strcmp(name, hello_name) != 0)
    77                 memset(&e, 0, 
sizeof(e));
    80                 e.entry_timeout = 1.0;
    81                 hello_stat(e.ino, &e.attr);
    92 static void dirbuf_add(
fuse_req_t req, 
struct dirbuf *b, 
const char *name,
    96         size_t oldsize = b->size;
    98         b->p = (
char *) realloc(b->p, b->size);
    99         memset(&stbuf, 0, 
sizeof(stbuf));
   105 #define min(x, y) ((x) < (y) ? (x) : (y))   107 static int reply_buf_limited(
fuse_req_t req, 
const char *buf, 
size_t bufsize,
   108                              off_t off, 
size_t maxsize)
   112                                       min(bufsize - off, maxsize));
   127                 memset(&b, 0, 
sizeof(b));
   128                 dirbuf_add(req, &b, 
".", 1);
   129                 dirbuf_add(req, &b, 
"..", 1);
   130                 dirbuf_add(req, &b, hello_name, 2);
   131                 reply_buf_limited(req, b.p, b.size, off, size);
   141         else if ((fi->
flags & O_ACCMODE) != O_RDONLY)
   153         reply_buf_limited(req, hello_str, strlen(hello_str), off, size);
   157         .
lookup         = hello_ll_lookup,
   158         .getattr        = hello_ll_getattr,
   159         .readdir        = hello_ll_readdir,
   160         .open           = hello_ll_open,
   161         .read           = hello_ll_read,
   164 int main(
int argc, 
char *argv[])
   167         struct fuse_session *se;
   168         struct fuse_cmdline_opts opts;
   173         if (opts.show_help) {
   174                 printf(
"usage: %s [options] <mountpoint>\n\n", argv[0]);
   179         } 
else if (opts.show_version) {
   186         if(opts.mountpoint == NULL) {
   187                 printf(
"usage: %s [options] <mountpoint>\n", argv[0]);
   188                 printf(
"       %s --help\n", argv[0]);
   194                               sizeof(hello_ll_oper), NULL);
   207         if (opts.singlethread)
   210                 ret = fuse_session_loop_mt(se, opts.clone_fd);
   218         free(opts.mountpoint);
 void(* lookup)(fuse_req_t req, fuse_ino_t parent, const char *name)
struct fuse_session * fuse_session_new(struct fuse_args *args, const struct fuse_lowlevel_ops *op, size_t op_size, void *userdata)
void fuse_session_unmount(struct fuse_session *se)
void fuse_lowlevel_version(void)
int fuse_session_loop(struct fuse_session *se)
int fuse_reply_entry(fuse_req_t req, const struct fuse_entry_param *e)
size_t fuse_add_direntry(fuse_req_t req, char *buf, size_t bufsize, const char *name, const struct stat *stbuf, off_t off)
int fuse_parse_cmdline(struct fuse_args *args, struct fuse_cmdline_opts *opts)
int fuse_set_signal_handlers(struct fuse_session *se)
const char * fuse_pkgversion(void)
int fuse_reply_err(fuse_req_t req, int err)
struct fuse_req * fuse_req_t
void fuse_remove_signal_handlers(struct fuse_session *se)
#define FUSE_ARGS_INIT(argc, argv)
int fuse_reply_open(fuse_req_t req, const struct fuse_file_info *fi)
void fuse_session_destroy(struct fuse_session *se)
int fuse_session_mount(struct fuse_session *se, const char *mountpoint)
void fuse_lowlevel_help(void)
void fuse_cmdline_help(void)
int fuse_reply_buf(fuse_req_t req, const char *buf, size_t size)
int fuse_reply_attr(fuse_req_t req, const struct stat *attr, double attr_timeout)
int fuse_daemonize(int foreground)
void fuse_opt_free_args(struct fuse_args *args)