265 lines
7.4 KiB
Groff
265 lines
7.4 KiB
Groff
|
.\" Copyright (c) 1980, 1989, 1991, 1993
|
||
|
|
.\" The Regents of the University of California. All rights reserved.
|
||
|
|
.\"
|
||
|
|
.\" Redistribution and use in source and binary forms, with or without
|
||
|
|
.\" modification, are permitted provided that the following conditions
|
||
|
|
.\" are met:
|
||
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
||
|
|
.\" notice, this list of conditions and the following disclaimer.
|
||
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
||
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
||
|
|
.\" documentation and/or other materials provided with the distribution.
|
||
|
|
.\" 3. All advertising materials mentioning features or use of this software
|
||
|
|
.\" must display the following acknowledgement:
|
||
|
|
.\" This product includes software developed by the University of
|
||
|
|
.\" California, Berkeley and its contributors.
|
||
|
|
.\" 4. Neither the name of the University nor the names of its contributors
|
||
|
|
.\" may be used to endorse or promote products derived from this software
|
||
|
|
.\" without specific prior written permission.
|
||
|
|
.\"
|
||
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
||
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
||
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||
|
|
.\" SUCH DAMAGE.
|
||
|
|
.\"
|
||
|
|
.\" @(#)mount.8 8.7 (Berkeley) 3/27/94
|
||
|
|
.\"
|
||
|
|
.Dd March 27, 1994
|
||
|
|
.Dt MOUNT 8
|
||
|
|
.Os BSD 4
|
||
|
|
.Sh NAME
|
||
|
|
.Nm mount
|
||
|
|
.Nd mount file systems
|
||
|
|
.Sh SYNOPSIS
|
||
|
|
.Nm mount
|
||
|
|
.Op Fl adfruvw
|
||
|
|
.Op Fl t Ar ufs | lfs | external_type
|
||
|
|
.Nm mount
|
||
|
|
.Op Fl dfruvw
|
||
|
|
.Ar special | node
|
||
|
|
.Nm mount
|
||
|
|
.Op Fl dfruvw
|
||
|
|
.Op Fl o Ar options
|
||
|
|
.Op Fl t Ar ufs | lfs | external_type
|
||
|
|
.Ar special node
|
||
|
|
.Sh DESCRIPTION
|
||
|
|
The
|
||
|
|
.Nm mount
|
||
|
|
command
|
||
|
|
calls the
|
||
|
|
.Xr mount 2
|
||
|
|
system call to prepare and graft a
|
||
|
|
.Ar "special device"
|
||
|
|
or the remote node (rhost:path) on to the file system tree at the point
|
||
|
|
.Ar node .
|
||
|
|
If either
|
||
|
|
.Ar special
|
||
|
|
or
|
||
|
|
.Ar node
|
||
|
|
are not provided, the appropriate information is taken from the
|
||
|
|
.Xr fstab 5
|
||
|
|
file.
|
||
|
|
.Pp
|
||
|
|
The system maintains a list of currently mounted file systems.
|
||
|
|
If no arguments are given to
|
||
|
|
.Nm mount,
|
||
|
|
this list is printed.
|
||
|
|
.Pp
|
||
|
|
The options are as follows:
|
||
|
|
.Bl -tag -width indent
|
||
|
|
.It Fl d
|
||
|
|
Causes everything to be done except for the actual system call.
|
||
|
|
This option is useful in conjunction with the
|
||
|
|
.Fl v
|
||
|
|
flag to
|
||
|
|
determine what the
|
||
|
|
.Nm mount
|
||
|
|
command is trying to do.
|
||
|
|
.It Fl f
|
||
|
|
Forces the revocation of write access when trying to downgrade
|
||
|
|
a filesystem mount status from read-write to read-only.
|
||
|
|
.It Fl o
|
||
|
|
Options are specified with a
|
||
|
|
.Fl o
|
||
|
|
flag followed by a comma separated string of options.
|
||
|
|
The following options are available:
|
||
|
|
.Bl -tag -width indent
|
||
|
|
.It async
|
||
|
|
All
|
||
|
|
.Tn I/O
|
||
|
|
to the file system should be done asynchronously.
|
||
|
|
This is a
|
||
|
|
.Em dangerous
|
||
|
|
flag to set,
|
||
|
|
and should not be used unless you are prepared to recreate the file
|
||
|
|
system should your system crash.
|
||
|
|
.It force
|
||
|
|
The same as
|
||
|
|
.Fl f ;
|
||
|
|
forces the revocation of write access when trying to downgrade
|
||
|
|
a filesystem mount status from read-write to read-only.
|
||
|
|
.It nodev
|
||
|
|
Do not interpret character or block special devices on the file system.
|
||
|
|
This option is useful for a server that has file systems containing
|
||
|
|
special devices for architectures other than its own.
|
||
|
|
.It noexec
|
||
|
|
Do not allow execution of any binaries on the mounted file system.
|
||
|
|
This option is useful for a server that has file systems containing
|
||
|
|
binaries for architectures other than its own.
|
||
|
|
.It nosuid
|
||
|
|
Do not allow set-user-identifier or set-group-identifier bits to take effect.
|
||
|
|
.It rdonly
|
||
|
|
The same as
|
||
|
|
.Fl r ;
|
||
|
|
mount the file system read-only (even the super-user may not write it).
|
||
|
|
.It sync
|
||
|
|
All
|
||
|
|
.Tn I/O
|
||
|
|
to the file system should be done synchronously.
|
||
|
|
.It update
|
||
|
|
The same as
|
||
|
|
.Fl u ;
|
||
|
|
indicate that the status of an already mounted file system should be changed.
|
||
|
|
.It union
|
||
|
|
Causes the namespace at the mount point to appear as the union
|
||
|
|
of the mounted filesystem root and the existing directory.
|
||
|
|
Lookups will be done in the mounted filesystem first.
|
||
|
|
If those operations fail due to a non-existent file the underlying
|
||
|
|
directory is then accessed.
|
||
|
|
All creates are done in the mounted filesystem.
|
||
|
|
.El
|
||
|
|
.Pp
|
||
|
|
Any additional options specific to a filesystem type that is not
|
||
|
|
one of the internally known types (see the
|
||
|
|
.Fl t
|
||
|
|
option) may be passed as a comma separated list; these options are
|
||
|
|
distinguished by a leading
|
||
|
|
.Dq \&-
|
||
|
|
(dash).
|
||
|
|
Options that take a value are specified using the syntax -option=value.
|
||
|
|
For example, the mount command:
|
||
|
|
.Bd -literal -offset indent
|
||
|
|
mount -t mfs -o nosuid,-N,-s=4000 /dev/dk0b /tmp
|
||
|
|
.Ed
|
||
|
|
.Pp
|
||
|
|
causes
|
||
|
|
.Nm mount
|
||
|
|
to execute the equivalent of:
|
||
|
|
.Bd -literal -offset indent
|
||
|
|
/sbin/mount_mfs -o nosuid -N -s 4000 /dev/dk0b /tmp
|
||
|
|
.Ed
|
||
|
|
.It Fl r
|
||
|
|
The file system is to be mounted read-only.
|
||
|
|
Mount the file system read-only (even the super-user may not write it).
|
||
|
|
The same as the
|
||
|
|
.Dq rdonly
|
||
|
|
argument to the
|
||
|
|
.Fl o
|
||
|
|
option.
|
||
|
|
.It Fl t Ar "ufs \\*(Ba lfs \\*(Ba external type"
|
||
|
|
The argument following the
|
||
|
|
.Fl t
|
||
|
|
is used to indicate the file system type.
|
||
|
|
The type
|
||
|
|
.Ar ufs
|
||
|
|
is the default.
|
||
|
|
The \fI-t\fP option can be used
|
||
|
|
to indicate that the actions should only be taken on
|
||
|
|
filesystems of the specified type.
|
||
|
|
More than one type may be specified in a comma separated list.
|
||
|
|
The list of filesystem types can be prefixed with
|
||
|
|
.Dq no
|
||
|
|
to specify the filesystem types for which action should
|
||
|
|
.Em not
|
||
|
|
be taken.
|
||
|
|
For example, the
|
||
|
|
.Nm mount
|
||
|
|
command:
|
||
|
|
.Bd -literal -offset indent
|
||
|
|
mount -a -t nonfs,mfs
|
||
|
|
.Ed
|
||
|
|
.Pp
|
||
|
|
mounts all filesystems except those of type
|
||
|
|
.Tn NFS
|
||
|
|
and
|
||
|
|
.Tn MFS .
|
||
|
|
.Pp
|
||
|
|
If the type is not one of the internally known types,
|
||
|
|
mount will attempt to execute a program in
|
||
|
|
.Pa /sbin/mount_ Ns Em XXX
|
||
|
|
where
|
||
|
|
.Em XXX
|
||
|
|
is replaced by the type name.
|
||
|
|
For example, nfs filesystems are mounted by the program
|
||
|
|
.Pa /sbin/mount_nfs .
|
||
|
|
.It Fl u
|
||
|
|
The
|
||
|
|
.Fl u
|
||
|
|
flag indicates that the status of an already mounted file
|
||
|
|
system should be changed.
|
||
|
|
Any of the options discussed above (the
|
||
|
|
.Fl o
|
||
|
|
option)
|
||
|
|
may be changed;
|
||
|
|
also a file system can be changed from read-only to read-write
|
||
|
|
or vice versa.
|
||
|
|
An attempt to change from read-write to read-only will fail if any
|
||
|
|
files on the filesystem are currently open for writing unless the
|
||
|
|
.Fl f
|
||
|
|
flag is also specified.
|
||
|
|
The set of options is determined by first extracting the options
|
||
|
|
for the file system from the
|
||
|
|
.Xr fstab
|
||
|
|
table,
|
||
|
|
then applying any options specified by the
|
||
|
|
.Fl o
|
||
|
|
argument,
|
||
|
|
and finally applying the
|
||
|
|
.Fl r
|
||
|
|
or
|
||
|
|
.Fl w
|
||
|
|
option.
|
||
|
|
.It Fl v
|
||
|
|
Verbose mode.
|
||
|
|
.It Fl w
|
||
|
|
The file system object is to be read and write.
|
||
|
|
.Pp
|
||
|
|
The options specific to NFS filesystems are described in the
|
||
|
|
.Xr mount_nfs 8
|
||
|
|
manual page.
|
||
|
|
.Sh FILES
|
||
|
|
.Bl -tag -width /etc/fstab -compact
|
||
|
|
.It Pa /etc/fstab
|
||
|
|
file system table
|
||
|
|
.El
|
||
|
|
.Sh SEE ALSO
|
||
|
|
.Xr mount 2 ,
|
||
|
|
.Xr fstab 5 ,
|
||
|
|
.Xr mount_cd9660 8 ,
|
||
|
|
.Xr mount_fdesc 8 ,
|
||
|
|
.Xr mount_kernfs 8 ,
|
||
|
|
.Xr mount_lfs 8 ,
|
||
|
|
.Xr mount_lofs 8 ,
|
||
|
|
.Xr mount_mfs 8 ,
|
||
|
|
.Xr mount_nfs 8 ,
|
||
|
|
.Xr mount_null 8 ,
|
||
|
|
.Xr mount_portal 8 ,
|
||
|
|
.Xr mount_procfs 8 ,
|
||
|
|
.Xr mount_umap 8 ,
|
||
|
|
.Xr mount_union 8 ,
|
||
|
|
.Xr umount 8
|
||
|
|
.Sh BUGS
|
||
|
|
It is possible for a corrupted file system to cause a crash.
|
||
|
|
.Sh HISTORY
|
||
|
|
A
|
||
|
|
.Nm mount
|
||
|
|
command appeared in
|
||
|
|
.At v6 .
|