168 lines
4.8 KiB
Groff
168 lines
4.8 KiB
Groff
.\" Copyright (c) 1993 University of Utah.
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.\" 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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.\" This code is derived from software contributed to Berkeley by
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.\" the Systems Programming Group of the University of Utah Computer
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.\" Science Department.
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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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.\" @(#)vnconfig.8 8.1 (Berkeley) 6/5/93
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.\"
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.Dd July 8, 1993
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.Dt VNCONFIG 8
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.Os BSD 4
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.Sh NAME
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.Nm vnconfig
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.Nd configure and enable vnode disks
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.Sh SYNOPSIS
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.Nm vnconfig
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.Op Fl cdeuv
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.Ar special_file Ar regular_file
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.Oo Ar feature Oc
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.Nm vnconfig
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.Fl a
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.Op Fl cdeuv
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.Op Fl f Ar config_file
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.Sh DESCRIPTION
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The
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.Nm vnconfig
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command configures and enables vnode pseudo disk devices.
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The first form of the command will associate the special file
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.Ar special_file
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with the regular file
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.Ar regular_file
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allowing the latter to be accessed as though it were a disk.
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Hence a regular file within the filesystem can be used for swapping
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or can contain a filesystem that is mounted in the name space.
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.Pp
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Options indicate an action to be performed:
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.Bl -tag -width indent
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.It Fl c
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Configures the device.
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If successful, references to
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.Ar special_file
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will access the contents of
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.Ar regular_file .
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.It Fl e
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Configures the device and enables any
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.Ar feature
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that was specified.
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If no feature was specified,
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.Fl e
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is the same as
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.Fl c .
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.It Fl d
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Disables (if possible) the specified feature.
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.It Fl u
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Disables and ``unconfigures'' the device.
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.It Fl v
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Print messages to stdout describing actions taken.
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.El
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.Pp
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If no action option is given,
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.Fl c
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is assumed.
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.Pp
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The
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.Ar feature
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argument specifies a feature that can be enabled via the
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.Fl e
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option:
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.Bl -tag -width indent
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.It Dv swap
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Swapping is enabled on the special file.
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See
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.Xr swapon 2 .
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.It Dv Pf mountro= Pa mount_point
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The special file is mounted read-only on
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.Ar mount_point .
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See
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.Xr mount 2 .
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.It Dv Pf mountrw= Pa mount_point
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The special file is mounted read-write on
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.Ar mount_point .
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See
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.Xr mount 2 .
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.It Dv Pf mount= Pa mount_point
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Same as ``mountrw=''.
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.El
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.Pp
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The second (
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.Fl a
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) form of the command reads a command file and performs the
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specified actions for each device/file pair.
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With
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.Fl f
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it reads the indicated configuration file
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.Ar config_file .
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Otherwise it uses a default configuration file.
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A configuration file contains one line per device/file pair in the form:
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.Bd -literal
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special_file regular_file [ feature ]
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.Ed
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.Pp
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where fields are seperated by white space.
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The previously described action options serve to configure, enable,
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disable or unconfigure all devices in the configuration file.
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.Sh FILES
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.Bl -tag -width /etc/vntab -compact
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.It Pa /etc/vntab
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default configuration file for
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.Fl a
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option.
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.El
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.Sh EXAMPLES
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.Pp
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.Dl vnconfig /dev/vn0c /tmp/diskimage
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.Pp
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Configures the vnode disk
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.Pa vn0c .
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.Pp
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.Dl vnconfig -e /dev/vn0c /var/swapfile swap
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.Pp
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Configures
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.Pa vn0c
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and enables swapping on it.
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.Pp
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.Dl vnconfig -d /dev/vn0c myfilesystem mount=/mnt
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.Pp
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Unmounts (disables)
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.Pa vn0c .
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.Pp
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.Dl vnconfig -ae
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.Pp
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Configures and enables all devices specified in
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.Pa /etc/vntab .
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.Sh SEE ALSO
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.Xr mount 2 ,
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.Xr swapon 2 ,
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.Xr unmount 2 .
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