NAME
mknod - Creates a special file
SYNOPSIS
mknod special_file [ b major_device# minor_device# | c
major_device# minor_device#]
mknod filename p
FLAGS
b Indicates that the special file corresponds to a
block-oriented device (disk or tape)
c Indicates that the special file corresponds to a
character-oriented device
p Creates named pipes (FIFOs)
DESCRIPTION
The mknod command makes a directory entry. The first argu-
ment is the name of the special device file. Select a name
that is descriptive of the device.
The mknod command has two forms. In the first form, the
second argument is the b or c flag. The last two arguments
are numbers specifying the major_device, which helps the
operating system find the device driver code, and the
minor_device, the unit drive, or line number, which may be
either decimal or octal.
The assignment of major device numbers is specific to each
system. You can determine the device numbers by examining
the conf.c system source file. If you change the contents
of the conf.c file to add a device driver, you must rebuild
the kernel.
In the second form of mknod, you use the p flag to create
named pipes (FIFOs).
Only the superuser can create a character or device special
file.
EXAMPLES
1. To create the special file for a new drive, /dev/ra2,
with a major device number of 1 and a minor device
number of 2, enter:
mknod /dev/ra2 b 1 2
This command creates the special file, /dev/ra2, which
is a block special file with major device number 1 and
minor device number 2.
2. To create a named pipe, enter:
mknod pipe p
This command creates the FIFO called pipe in your
current directory.
FILES
/usr/sbin/mknod
Specifies the command path
conf.c Specifies the system device numbers specification
file
Acknowledgement and Disclaimer