175 lines
4.7 KiB
Groff
175 lines
4.7 KiB
Groff
.\" $NetBSD: mknod.8,v 1.18 2000/05/17 09:43:33 fair Exp $
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.\"
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.\" Copyright (c) 1980, 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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.\" @(#)mknod.8 8.2 (Berkeley) 12/11/93
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.\"
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.Dd September 11, 1998
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.Dt MKNOD 8
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.Os NetBSD 1.4
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.Sh NAME
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.Nm mknod
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.Nd make device special file
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.Sh SYNOPSIS
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.Nm
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.Op Fl F Ar format
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.Ar name
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.Op Cm c | Cm b
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.Ar major minor
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.Nm ""
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.Op Fl F Ar format
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.Ar name
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.Op Cm c | Cm b
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.Ar major unit subunit
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.Nm ""
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.Ar name
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.Op Cm c | Cm b
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.Ar number
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.Nm ""
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.Ar name
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.Cm p
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.Sh DESCRIPTION
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The
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.Nm
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command creates device special files, or fifos.
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Normally the shell script
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.Pa /dev/MAKEDEV
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is used to create special files for commonly known devices; it executes
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.Nm
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with the appropriate arguments and can make all the files required for the
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device.
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.Pp
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To make nodes manually, the required arguments are:
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.Pp
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.Bl -tag -width majorx
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.It Ar name
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Device name, for example
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.Dq sd
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for a SCSI disk on an HP300 or a
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.Dq pty
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for pseudo-devices.
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.It Cm b | Cm c | Cm p
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Type of device.
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If the device is a block type device such as a tape or disk drive
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which needs both cooked and raw special files, the type is
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.Cm b .
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All other devices are character type devices, such as terminal
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and pseudo devices, and are type
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.Cm c .
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Specifying
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.Cm p
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creates fifo files.
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.It Ar major
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The major device number is an integer number which tells the kernel
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which device driver entry point to use.
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To learn what major device number to use for a particular device,
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check the file
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.Pa /dev/MAKEDEV
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to see if the device is known, or check
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the system dependent device configuration file:
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.Bd -filled -offset indent
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.Dq Pa /usr/src/sys/arch/<arch>/<arch>/conf.c
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.Ed
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.Pp
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.Po
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e.g.
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.Pa /usr/src/sys/arch/vax/vax/conf.c
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.Pc .
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.It Ar minor
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The minor device number tells the kernel which one of several similar
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devices the node corresponds to; for example, it may be a specific serial
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port or pty.
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.It Ar unit No and Ar subunit
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The unit and subunit numbers select a subset of a device; for example, the
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unit may specify a particular SCSI disk, and the subunit a partition on
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that disk.
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.Po
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Currently this form of specification is only supported by the
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.Ar bsdos
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format, for compatibility with the
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.Bsx
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.Xr mknod 8
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.Pc .
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.El
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.Pp
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The
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.Fl F
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option is used to create device nodes that may be used by an
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operating system which uses device numbers packed in a different
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format than
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.Nx
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uses.
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This is necessary when
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.Nx
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is used as an
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.Tn NFS
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server for netbooted computers running other operating systems.
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.Pp
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The following values for the
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.Ar format
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following
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.Fl F
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are recognized:
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.Sy native ,
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.Sy 386bsd ,
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.Sy 4bsd ,
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.Sy bsdos ,
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.Sy freebsd ,
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.Sy hpux ,
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.Sy isc ,
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.Sy linux ,
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.Sy netbsd ,
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.Sy osf1 ,
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.Sy sco ,
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.Sy solaris ,
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.Sy sunos ,
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.Sy svr3 ,
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.Sy svr4 ,
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and
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.Sy ultrix .
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.Pp
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Alternatively, a single opaque device number may be specified.
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.Sh SEE ALSO
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.Xr mkfifo 1 ,
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.Xr mkfifo 2 ,
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.Xr mknod 2 ,
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.Xr MAKEDEV 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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The
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.Fl F
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option appeared in
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.Nx 1.4 .
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