/usr/share/doc/libfuse-dev/examples/null.c is in libfuse-dev 2.9.3-15+deb8u2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | /*
FUSE: Filesystem in Userspace
Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu>
This program can be distributed under the terms of the GNU GPL.
See the file COPYING.
gcc -Wall null.c `pkg-config fuse --cflags --libs` -o null
*/
#define FUSE_USE_VERSION 26
#include <fuse.h>
#include <string.h>
#include <unistd.h>
#include <time.h>
#include <errno.h>
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 = (1ULL << 32); /* 4G */
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 size)
{
(void) size;
if(strcmp(path, "/") != 0)
return -ENOENT;
return 0;
}
static int null_open(const char *path, struct fuse_file_info *fi)
{
(void) fi;
if(strcmp(path, "/") != 0)
return -ENOENT;
return 0;
}
static int null_read(const char *path, char *buf, size_t size,
off_t offset, struct fuse_file_info *fi)
{
(void) buf;
(void) offset;
(void) fi;
if(strcmp(path, "/") != 0)
return -ENOENT;
if (offset >= (1ULL << 32))
return 0;
return size;
}
static int null_write(const char *path, const char *buf, size_t size,
off_t offset, struct fuse_file_info *fi)
{
(void) buf;
(void) offset;
(void) fi;
if(strcmp(path, "/") != 0)
return -ENOENT;
return size;
}
static struct fuse_operations null_oper = {
.getattr = null_getattr,
.truncate = null_truncate,
.open = null_open,
.read = null_read,
.write = null_write,
};
int main(int argc, char *argv[])
{
return fuse_main(argc, argv, &null_oper, NULL);
}
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