1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
|
/*
FUSE: Filesystem in Userspace
Copyright (C) 2001 Miklos Szeredi (mszeredi@inf.bme.hu)
This program can be distributed under the terms of the GNU GPL.
See the file COPYING.
*/
#include <fuse.h>
#include <string.h>
#include <unistd.h>
#include <time.h>
#include <errno.h>
#define UNUSED(x) x __attribute__((unused))
static int null_getattr(const char *path, struct stat *stbuf)
{
if(strcmp(path, "/") != 0)
return -ENOENT;
stbuf->st_mode = S_IFREG | 0644;
stbuf->st_nlink = 1;
stbuf->st_uid = getuid();
stbuf->st_gid = getgid();
stbuf->st_size = (1 << 30); /* 1G */
stbuf->st_blocks = 0;
stbuf->st_atime = stbuf->st_mtime = stbuf->st_ctime = time(NULL);
return 0;
}
static int null_truncate(const char *path, off_t UNUSED(size))
{
if(strcmp(path, "/") != 0)
return -ENOENT;
return 0;
}
static int null_open(const char *path, int UNUSED(flags))
{
if(strcmp(path, "/") != 0)
return -ENOENT;
return 0;
}
static int null_read(const char *path, char *UNUSED(buf), size_t size,
off_t UNUSED(offset))
{
if(strcmp(path, "/") != 0)
return -ENOENT;
return size;
}
static int null_write(const char *path, const char *UNUSED(buf), size_t size,
off_t UNUSED(offset))
{
if(strcmp(path, "/") != 0)
return -ENOENT;
return size;
}
static int null_statfs(struct fuse_statfs *st)
{
return st->block_size = st->blocks = st->blocks_free = st->files =
st->files_free = st->namelen = 0;
}
static struct fuse_operations null_oper = {
getattr: null_getattr,
readlink: NULL,
getdir: NULL,
mknod: NULL,
mkdir: NULL,
symlink: NULL,
unlink: NULL,
rmdir: NULL,
rename: NULL,
link: NULL,
chmod: NULL,
chown: NULL,
truncate: null_truncate,
utime: NULL,
open: null_open,
read: null_read,
write: null_write,
statfs: null_statfs,
release: NULL,
fsync: NULL
};
int main(int argc, char *argv[])
{
fuse_main(argc, argv, &null_oper);
return 0;
}
|
