>> mknod (8) ( FreeBSD man: Команды системного администрирования )
- build special file
[b | c
[owner : group
utility is deprecated on modern
utility creates device special files.
To make nodes manually, the four required arguments are:
Device name, for example
for a SCSI disk on an HP300 or a
b | c
Type of device.
device is a block type device such as a tape or disk drive which needs
both cooked and raw special files,
the type is
All other devices are character type devices, such as terminal
and pseudo devices, and are type
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
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.
owner : group
operand pair is optional, however, if one is specified, they both must be
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
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
Major and minor device numbers can be given in any format acceptable to
so that a leading
indicates a hexadecimal number, and a leading
will cause the number to be interpreted as octal.
utility can be used to recreate deleted device nodes under a
mount point by invoking it using dummy arguments.
"mknod cd0 c 0 0"
is the name of the deleted device node.
like functionality is specific to
Fx 4.0 ,
block devices were deprecated in favour of character
Fx 5.0 ,
device nodes are managed by the device file system
device nodes may be created in regular file systems but such
nodes cannot be used to access devices.