NAME
fuse_mount,
fuse_unmount —
mount or dismount a FUSE file
system
SYNOPSIS
#include
<fuse.h>
struct fuse_chan *
fuse_mount(const
char *dir, struct
fuse_args *args);
void
fuse_unmount(const
char *dir, struct
fuse_chan *ch);
DESCRIPTION
The
fuse_mount()
function calls the
mount(2) system call to graft the FUSE file system on to the file
system tree at the point dir.
args are FUSE specific mount options as documented by
mount(2).
The following mount options can be specified by preceding them
with -o, either individually or together separated
by a comma.
- allow_other
- Allow other users to access the file system. By default, FUSE will prevent other users from accessing the file system or to statfs(2) the file system. This security measure is particularly important for network file system that may expose private files. It also guards against system processes being blocked indefinitely if the file system stops responding.
- default_permissions
- Request that the kernel enforce file access permissions. Alternatively, FUSE file systems can choose to implement access checks internally. On OpenBSD, this option is always set.
- kernel_cache
- Enables buffering of files in the kernel. Not recommended for file systems that can be updated external to FUSE, such as network file systems. Not implemented.
- max_read=%u
- Specify the maximum size of read operations. Note that the kernel limits this to FUSEBUFMAXSIZE. This option should not be specified on the command line. The correct (or optimum) value depends on the filesystem implementation and should thus be specified by the filesystem internally.
- ro
- Mount the file system read-only. Can also be specified by itself with
-r.
fuse_unmount()
will attempt to unmount the file system mounted at dir
by calling the
unmount(2) system call. If this is successful, the kernel will send
the FBT_DESTROY message to the file system, causing
fuse_loop(3) to terminate. There is no way to determine whether this
call was successful.
Only the super user can mount and unmount FUSE file systems.
RETURN VALUES
fuse_main() will return NULL if the file
system cannot be mounted.
ERRORS
fuse_mount() will fail when one of the
following occurs: dir does not exist or is not a
directory. The fuse device cannot be opened for reading and writing. There
was an error parsing the options specified by args.
The file system could not be mounted.
SEE ALSO
STANDARDS
The fuse_mount() and
fuse_unmount() functions conforms to FUSE 2.6.
HISTORY
The fuse_mount() and
fuse_unmount() functions first appeared in
OpenBSD 5.4.
AUTHORS
Sylvestre Gallon
<ccna.syl@gmail.com>
Helg Bredow
<helg@openbsd.org>