#define FUSE_USE_VERSION FUSE_MAKE_VERSION(3, 12)
 
#include <fuse_lowlevel.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <assert.h>
 
static const char *hello_str = "Hello World!\n";
static const char *hello_name = "hello";
 
static int hello_stat(
fuse_ino_t ino, 
struct stat *stbuf)
 
{
        stbuf->st_ino = ino;
        switch (ino) {
        case 1:
                stbuf->st_mode = S_IFDIR | 0755;
                stbuf->st_nlink = 2;
                break;
 
        case 2:
                stbuf->st_mode = S_IFREG | 0444;
                stbuf->st_nlink = 1;
                stbuf->st_size = strlen(hello_str);
                break;
 
        default:
                return -1;
        }
        return 0;
}
 
static void hello_ll_init(
void *userdata, 
struct fuse_conn_info *conn)
 
{
        (void)userdata;
 
        
 
        
        conn->
want &= ~FUSE_CAP_ASYNC_READ;
}
 
{
        struct stat stbuf;
 
        (void) fi;
 
        memset(&stbuf, 0, sizeof(stbuf));
        if (hello_stat(ino, &stbuf) == -1)
        else
}
 
{
 
        if (parent != 1 || strcmp(name, hello_name) != 0)
        else {
                memset(&e, 0, sizeof(e));
                e.ino = 2;
                e.attr_timeout = 1.0;
                e.entry_timeout = 1.0;
                hello_stat(e.ino, &e.attr);
 
        }
}
 
struct dirbuf {
        char *p;
        size_t size;
};
 
static void dirbuf_add(
fuse_req_t req, 
struct dirbuf *b, 
const char *name,
 
{
        struct stat stbuf;
        size_t oldsize = b->size;
        b->p = (char *) realloc(b->p, b->size);
        memset(&stbuf, 0, sizeof(stbuf));
        stbuf.st_ino = ino;
                          b->size);
}
 
#define min(x, y) ((x) < (y) ? (x) : (y))
 
static int reply_buf_limited(
fuse_req_t req, 
const char *buf, 
size_t bufsize,
 
                             off_t off, size_t maxsize)
{
        if (off < bufsize)
                                      min(bufsize - off, maxsize));
        else
}
 
{
        (void) fi;
 
        if (ino != 1)
        else {
                struct dirbuf b;
 
                memset(&b, 0, sizeof(b));
                dirbuf_add(req, &b, ".", 1);
                dirbuf_add(req, &b, "..", 1);
                dirbuf_add(req, &b, hello_name, 2);
                reply_buf_limited(req, b.p, b.size, off, size);
                free(b.p);
        }
}
 
{
        if (ino != 2)
        else if ((fi->
flags & O_ACCMODE) != O_RDONLY)
 
        else
}
 
{
        (void) fi;
 
        assert(ino == 2);
        reply_buf_limited(req, hello_str, strlen(hello_str), off, size);
}
 
                                                          size_t size)
{
        (void)size;
        assert(ino == 1 || ino == 2);
        if (strcmp(name, "hello_ll_getxattr_name") == 0)
        {
                const char *buf = "hello_ll_getxattr_value";
        }
        else
        {
        }
}
 
                                                          const char *value, size_t size, int flags)
{
        (void)flags;
        (void)size;
        assert(ino == 1 || ino == 2);
        const char* exp_val = "hello_ll_setxattr_value";
        if (strcmp(name, "hello_ll_setxattr_name") == 0 &&
            strlen(exp_val) == size &&
            strncmp(value, exp_val, size) == 0)
        {
        }
        else
        {
        }
}
 
{
        assert(ino == 1 || ino == 2);
        if (strcmp(name, "hello_ll_removexattr_name") == 0)
        {
        }
        else
        {
        }
}
 
        .lookup = hello_ll_lookup,
        .getattr = hello_ll_getattr,
        .readdir = hello_ll_readdir,
        .open = hello_ll_open,
        .read = hello_ll_read,
        .setxattr = hello_ll_setxattr,
        .getxattr = hello_ll_getxattr,
        .removexattr = hello_ll_removexattr,
};
 
int main(int argc, char *argv[])
{
        struct fuse_session *se;
        int ret = -1;
 
        if (fuse_parse_cmdline(&args, &opts) != 0)
                return 1;
        if (opts.show_help) {
                printf("usage: %s [options] <mountpoint>\n\n", argv[0]);
                ret = 0;
                goto err_out1;
        } else if (opts.show_version) {
                ret = 0;
                goto err_out1;
        }
 
        if(opts.mountpoint == NULL) {
                printf("usage: %s [options] <mountpoint>\n", argv[0]);
                printf("       %s --help\n", argv[0]);
                ret = 1;
                goto err_out1;
        }
 
        se = fuse_session_new(&args, &hello_ll_oper,
                              sizeof(hello_ll_oper), NULL);
        if (se == NULL)
            goto err_out1;
 
            goto err_out2;
 
            goto err_out3;
 
 
        
        if (opts.singlethread)
        else {
                config = fuse_loop_cfg_create();
                fuse_loop_cfg_set_clone_fd(config, opts.clone_fd);
                fuse_loop_cfg_set_max_threads(config, opts.max_threads);
                ret = fuse_session_loop_mt(se, config);
                fuse_loop_cfg_destroy(config);
                config = NULL;
        }
 
err_out3:
err_out2:
err_out1:
        free(opts.mountpoint);
 
        return ret ? 1 : 0;
}
int fuse_set_signal_handlers(struct fuse_session *se)
#define FUSE_CAP_ASYNC_READ
const char * fuse_pkgversion(void)
void fuse_remove_signal_handlers(struct fuse_session *se)
int fuse_daemonize(int foreground)
void fuse_session_destroy(struct fuse_session *se)
int fuse_reply_open(fuse_req_t req, const struct fuse_file_info *fi)
int fuse_reply_err(fuse_req_t req, int err)
int fuse_reply_buf(fuse_req_t req, const char *buf, size_t size)
struct fuse_req * fuse_req_t
int fuse_session_loop(struct fuse_session *se)
int fuse_reply_entry(fuse_req_t req, const struct fuse_entry_param *e)
void fuse_session_unmount(struct fuse_session *se)
void fuse_cmdline_help(void)
void fuse_lowlevel_help(void)
int fuse_session_mount(struct fuse_session *se, const char *mountpoint)
void fuse_lowlevel_version(void)
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_reply_attr(fuse_req_t req, const struct stat *attr, double attr_timeout)
void fuse_opt_free_args(struct fuse_args *args)
#define FUSE_ARGS_INIT(argc, argv)
void(* init)(void *userdata, struct fuse_conn_info *conn)