1.\" Copyright (c) 1980, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)mknod.8 8.2 (Berkeley) 12/11/93 33.\" $FreeBSD$ 34.\" 35.Dd December 11, 1993 36.Dt MKNOD 8 37.Os BSD 4 38.Sh NAME 39.Nm mknod 40.Nd build special file 41.Sh SYNOPSIS 42.Nm mknod 43.Ar name 44.Op Cm c | Cm b 45.Ar major minor 46.Op owner:group 47.Sh DESCRIPTION 48The 49.Nm mknod 50command creates device special files. 51Normally the shell script 52.Pa /dev/MAKEDEV 53is used to create special files for commonly known devices; it executes 54.Nm 55with the appropriate arguments and can make all the files required for the 56device. 57.Pp 58To make nodes manually, the four required arguments are: 59.Pp 60.Bl -tag -width indent 61.It Ar name 62Device name, for example 63.Dq sd 64for a SCSI disk on an HP300 or a 65.Dq pty 66for pseudo-devices. 67.It Cm b | Cm c 68Type of device. If the 69device is a block type device such as a tape or disk drive which needs 70both cooked and raw special files, 71the type is 72.Cm b . 73All other devices are character type devices, such as terminal 74and pseudo devices, and are type 75.Cm c . 76.It Ar major 77The major device number is an integer number which tells the kernel 78which device driver entry point to use. To learn what 79major device number to use for a particular device, check the file 80.Pa /dev/MAKEDEV 81to see if the device is known, or check 82the system dependent device configuration file: 83.Bd -filled -offset indent 84.Dq Pa /usr/src/sys/conf/device. Ns Em architecture 85.Ed 86.Pp 87(for example 88.Pa device.hp300 ) . 89.It Ar minor 90The minor device number tells the kernel which subunit 91the node corresponds to on the device; for example, 92a subunit may be a filesystem partition 93or a tty line. 94.It Ar "owner \: group" 95The 96.Ar owner 97.Ar group 98operand pair is optional, however, if one is specified, they both must be 99specified. 100The 101.Ar owner 102may be either a numeric user ID or a user name. 103If a user name is also a numeric user ID, the operand is used as a 104user name. 105The 106.Ar group 107may be either a numeric group ID or a group name. 108Simular to the user name, 109if a group name is also a numeric group ID, the operand is used as a 110group name. 111.El 112.Pp 113Major and minor device numbers can be given in any format acceptable to 114.Xr strtoul 3 , 115so that a leading 116.Ql 0x 117indicates a hexadecimal number, and a leading 118.Ql 0 119will cause the number to be interpreted as octal. 120.Sh COMPATIBILITY 121The 122.Xr chown 8 123like functionality is specific to 124.Fx 125and was added so that 126.Pa /dev/MAKEDEV 127wound not depend on 128.Pa /usr 129being mounted. 130.Sh SEE ALSO 131.Xr mkfifo 1 , 132.Xr mknod 2 , 133.Xr MAKEDEV 8 , 134.Xr chown 8 135.Sh HISTORY 136A 137.Nm 138command appeared in 139.At v6 . 140