freebsd-skq/sbin/mount_std/mount_std.8

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.\" $FreeBSD$
.\"
.Dd November 26, 2004
.Dt MOUNT_STD 8
.Os
.Sh NAME
.Nm mount_std ,
.Nm mount_devfs ,
.Nm mount_fdescfs ,
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.Nm mount_linprocfs ,
.Nm mount_procfs
.Nd mount
.Dq standard
file systems
.Sh SYNOPSIS
.Nm mount_ Ns Ar fsname
.Op Fl o Ar options
.Ar "fs"
.Ar mount_point
.Sh DESCRIPTION
The
.Nm
utility is a generic mechanism for attaching ``standard'' file systems to
the file system.
The
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.Nm
utility currently supports the following file systems:
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.Nm devfs ,
.Nm fdescfs ,
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.Nm linprocfs
and
.Nm procfs .
A ``standard'' file system is one which:
.Bl -enum -offset indent
.It
accepts only the standard
.Fl o
options
.Dq ro ,
.Dq rw ,
.Dq noexec ,
.Dq nosuid ,
and
.Dq union .
.It
has a kernel file system module name the same as its user-visible name.
.It
requires no other special processing on the part of the
.Nm
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utility.
.El
.Pp
The options are as follows:
.Bl -tag -width indent
.It Fl o
Options are specified with a
.Fl o
flag followed by a comma separated string of options.
See the
.Xr mount 8
man page for possible options and their meanings.
.El
.Pp
The
.Nm
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utility examines its zeroth command-line argument (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
.Dq Li _ Ns Ar fsname ,
.Nm
will assume (for compatibility
with
.Xr mount 8 )
that the zeroth argument contains only the name of the file system type.
The
.Nm
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utility is normally installed with appropriate links to commands 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
.Nm mount_ Ns Ar fsname
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utility.
.Pp
Refer to the following manual pages for detailed information
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on these file systems:
.Xr devfs 5 ,
.Xr fdescfs 5 ,
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.Xr linprocfs 5
and
.Xr procfs 5 .
.Sh DIAGNOSTICS
.Bl -diag
.It argv[0] must end in _fsname
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The
.Nm
utility was called with a zeroth argument of
.Dq Li mount_std .
.It %s file system not available
The specified file system type was not present in the kernel and no
loadable module for it was found.
.El
.Sh SEE ALSO
.Xr mount 2 ,
.Xr unmount 2 ,
.Xr getvfsbyname 3 ,
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.Xr devfs 5 ,
.Xr fdescfs 5 ,
.Xr fstab 5 ,
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.Xr linprocfs 5 ,
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.Xr procfs 5 ,
.Xr mount 8
.Sh HISTORY
The
.Nm
utility first appeared in
.Fx 2.2 .
Loadable file system modules first appeared in
.Fx 2.0 .
The
.Dq fdescfs
and
.Dq procfs
file system types first appeared in
.Fx 2.0 ;
the
.Dq devfs
file system type first appeared in
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.Fx 2.2 ;
the
.Dq linprocfs
file system type first appeared in
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.Fx 4.0 .
.Sh CAVEATS
None of the ``standard'' file systems may be NFS-exported.