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bc70c1725f
- Completly changed the internals of umount(8). We do three
checks now to see if 'argv' is in the mounttable. It they
all fail, we return to main and print a warning.
- fixed the umount mount-order. The checks are rather complex
to do this. Cause umount(8) should also be able to unmount
several devices at once ('umount -a', 'umount -A',
'umount /mnt /mnt2'), the mount-order get's important.
I added checks to mark and unmark already unmounted devices.
- Various fixes with nfs-unmounts (no rpc-calls were done,
or they were done although there was an existing mount).
Since we allow overlay-mounts, we should also handle them
properly.
- Translate the deprecated nfs-syntax with '@' to ':' like
mount_nfs does. The ':' syntax has now precedence, but '@'
still works.
- 'umount -v' is now fixed for all cases and doesn't print
garbage like two times the mountpoint etc.
- removed non documented and useless umount '-F'.
- hanged nfsmounts can now unmounted 'without' any problems.
I've removed stat() and realpath() checks on the mountpoint.
Instead we just do a realpath() on the basedir of the
mountpath and add the dirname again.
Implemented this as an idea from phk. But there are still
vfs-restrictions if the nfs_mount is busy. If there are
unwritten metadata on a hanged nfs-mount, and we modify
nfs_vfsops.c to not return EBUSY, we get a deadlock :(
The problem has now moved from userland to kernel.
- removed the BUGS part from the umount(8) manpage.
- Converted it to ANSI C (more than 60% of the code have
changed).
Martin_Blapp
Fixed PR's
----------
o [1999/02/03] bin/9893 NFS umount of regular file impossible
s [1995/11/27] bin/841 stale nfs mounts cannot be umounted
o [1999/08/01] bin/12911 alfred NFS umounts are not properly done
if just the mountpoint gets umounted
Only partially solved:
----------------------
The problem is now in kernel:
o [1999/04/07] bin/11005 `umount -f' does not work if the
NFS-server is down.
PR: bin/9893 bin/841 bin/12911 bin/11005
Submitted by: Martin Blapp <mb@imp.ch>
130 lines
3.7 KiB
Groff
130 lines
3.7 KiB
Groff
.\" Copyright (c) 1980, 1989, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)umount.8 8.2 (Berkeley) 5/8/95
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.\" $FreeBSD$
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.\"
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.Dd May 8, 1995
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.Dt UMOUNT 8
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.Os BSD 4
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.Sh NAME
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.Nm umount
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.Nd unmount filesystems
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.Sh SYNOPSIS
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.Nm umount
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.Op Fl fv
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.Ar special \&| node
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.Nm umount
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.Fl a | A
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.Op Fl fv
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.Op Fl h Ar host
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.Op Fl t Ar type
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.Sh DESCRIPTION
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The
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.Nm
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command
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calls the
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.Xr unmount 2
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system call to remove a
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.Ar "special device"
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or the remote node (rhost:path) from the filesystem tree at the point
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.Ar node .
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If either
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.Ar special
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or
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.Ar node
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are not provided, the appropriate information is taken from the
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.Xr fstab 5
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file.
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.Pp
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The options are as follows:
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.Bl -tag -width indent
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.It Fl a
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All the filesystems described in
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.Xr fstab 5
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are unmounted.
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.It Fl A
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All the currently mounted filesystems except
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the root are unmounted.
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.It Fl f
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The filesystem is forcibly unmounted.
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Active special devices continue to work,
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but all other files return errors if further accesses are attempted.
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The root filesystem cannot be forcibly unmounted.
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.It Fl h Ar host
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Only filesystems mounted from the specified host will be
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unmounted.
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This option implies the
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.Fl A
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option and, unless otherwise specified with the
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.Fl t
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option, will only unmount
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.Tn NFS
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filesystems.
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.It Fl t Ar type
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Is used to indicate the actions should only be taken on
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filesystems of the specified type.
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More than one type may be specified in a comma separated list.
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The list of filesystem types can be prefixed with
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.Dq no
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to specify the filesystem types for which action should
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.Em not
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be taken.
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For example, the
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.Nm
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command:
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.Bd -literal -offset indent
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umount -a -t nfs,mfs
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.Ed
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.Pp
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umounts all filesystems of the type
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.Tn NFS
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and
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.Tn MFS .
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.It Fl v
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Verbose, additional information is printed out as each filesystem
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is unmounted.
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.El
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.Sh FILES
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.Bl -tag -width /etc/fstab -compact
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.It Pa /etc/fstab
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filesystem table
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.El
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.Sh SEE ALSO
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.Xr unmount 2 ,
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.Xr fstab 5 ,
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.Xr mount 8
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.Sh HISTORY
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A
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.Nm
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command appeared in
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.At v6 .
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