129 lines
3.8 KiB
Groff
129 lines
3.8 KiB
Groff
.\" Copyright (c) 1980, 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.
|
|
.\" 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.
|
|
.\"
|
|
.\" @(#)mknod.8 8.2 (Berkeley) 12/11/93
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd December 11, 1993
|
|
.Dt MKNOD 8
|
|
.Os
|
|
.Sh NAME
|
|
.Nm mknod
|
|
.Nd build special file
|
|
.Sh SYNOPSIS
|
|
.Nm
|
|
.Ar name
|
|
.Op Cm c | Cm b
|
|
.Ar major minor
|
|
.Op Ar owner : Ns Ar group
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
utility creates device special files.
|
|
To make nodes manually, the four required arguments are:
|
|
.Pp
|
|
.Bl -tag -width indent
|
|
.It Ar name
|
|
Device name, for example
|
|
.Dq sd
|
|
for a SCSI disk on an HP300 or a
|
|
.Dq pty
|
|
for pseudo-terminals.
|
|
.It Cm b | Cm c
|
|
Type of device.
|
|
If the
|
|
device is a block type device such as a tape or disk drive which needs
|
|
both cooked and raw special files,
|
|
the type is
|
|
.Cm b .
|
|
All other devices are character type devices, such as terminal
|
|
and pseudo devices, and are type
|
|
.Cm c .
|
|
.It Ar major
|
|
The major device number is an integer number which tells the kernel
|
|
which device driver entry point to use. To learn what
|
|
major device number to use for a particular device, check
|
|
.Pa /usr/src/sys/conf/majors .
|
|
.It Ar minor
|
|
The minor device number tells the kernel which subunit
|
|
the node corresponds to on the device; for example,
|
|
a subunit may be a file system partition
|
|
or a tty line.
|
|
.It Ar owner : Ns Ar group
|
|
The
|
|
.Ar owner
|
|
.Ar group
|
|
operand pair is optional, however, if one is specified, they both must be
|
|
specified.
|
|
The
|
|
.Ar owner
|
|
may be either a numeric user ID or a user name.
|
|
If a user name is also a numeric user ID, the operand is used as a
|
|
user name.
|
|
The
|
|
.Ar group
|
|
may be either a numeric group ID or a group name.
|
|
Similar to the user name,
|
|
if a group name is also a numeric group ID, the operand is used as a
|
|
group name.
|
|
.El
|
|
.Pp
|
|
Major and minor device numbers can be given in any format acceptable to
|
|
.Xr strtoul 3 ,
|
|
so that a leading
|
|
.Ql 0x
|
|
indicates a hexadecimal number, and a leading
|
|
.Ql 0
|
|
will cause the number to be interpreted as octal.
|
|
.Pp
|
|
The
|
|
.Nm
|
|
tool can be used to recreate deleted device nodes under a
|
|
.Xr devfs 5 ,
|
|
mount point by invoking it using dummy arguments. Example:
|
|
.Bd -literal -offset indent
|
|
mknod cd0 c 0 0
|
|
.Ed
|
|
.Pp
|
|
Where
|
|
.Fa cd0
|
|
is the name of the deleted device node.
|
|
.Sh COMPATIBILITY
|
|
The
|
|
.Xr chown 8 Ns - Ns
|
|
like functionality is specific to
|
|
.Fx .
|
|
.Sh SEE ALSO
|
|
.Xr mkfifo 1 ,
|
|
.Xr mknod 2 ,
|
|
.Xr chown 8
|
|
.Sh HISTORY
|
|
A
|
|
.Nm
|
|
utility appeared in
|
|
.At v6 .
|