mount_std(8)

NAME

mount_std, mount_devfs, mount_fdescfs, mount_linprocfs,

mount_procfs mount ``standard'' file systems

SYNOPSIS

mount_fsname [-o options] fs mount_point

DESCRIPTION

The mount_std utility is a generic mechanism for attaching

``standard''
file systems to the file system. The mount_std utility cur

rently supports the following file systems: devfs, fdescfs, linprocfs

and procfs.
A ``standard'' file system is one which:

1. accepts only the standard -o options ``ro'',

``rw'',
``noexec'', ``nosuid'', and ``union''.

2. has a kernel file system module name the same as

its user-vis
ible name.

3. requires no other special processing on the part

of the
mount_std utility.

The options are as follows:

-o Options are specified with a -o flag followed by a

comma sepa
rated string of options. See the mount(8) man page

for possible
options and their meanings.

The mount_std utility examines its zeroth command-line argu

ment (the name
by which it was called) to determine the type of file system

to be
mounted. If it is called by a name which does not end in

``_fsname'',
mount_std will assume (for compatibility with mount(8)) that

the zeroth
argument contains only the name of the file system type.

The mount_std
utility is normally installed with appropriate links to com

mands for the
distributed file systems which can be mounted in this way;

for information on the function of each file system, see the manual

page for that
specific mount_fsname utility.

Refer to the following manual pages for detailed information

on these
file system: devfs(5), fdescfs(5), linprocfs(5) and

procfs(5).

DIAGNOSTICS

argv[0] must end in _fsname The mount_std utility was

called with a
zeroth argument of ``mount_std''.

%s file system not available The specified file system type

was not present in the kernel and no loadable module for it was found.

SEE ALSO

mount(2), unmount(2), getvfsbyname(3), devfs(5), fdescfs(5),

fstab(5),
linprocfs(5), procfs(5), mount(8)

CAVEATS

None of the ``standard'' file systems may be NFS-exported.

HISTORY

The mount_std utility first appeared in FreeBSD 2.2. Load

able file system modules first appeared in FreeBSD 2.0. The ``fdescfs''

and
``procfs'' file system types first appeared in FreeBSD 2.0;

the ``devfs''
file system type first appeared in FreeBSD 2.2; the ``lin

procfs'' file
system type first appeared in FreeBSD 4.0.

BSD November 26, 2004

BSD