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mknod(8)
NAME
mknod -- build special file
SYNOPSIS
mknod name [c | b] major minor [owner:group]
DESCRIPTION
The mknod utility is deprecated on modern FreeBSD systems.
The mknod utility creates device special files. To make nodes manually,
the four required arguments are:
name Device name, for example ``sd'' for a SCSI disk on an HP300 or a
``pty'' for pseudo-terminals.
b | 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 b. All other devices are character type devices,
such as terminal and pseudo devices, and are type c.
major The major device number is an integer number which tells the ker-
nel which device driver entry point to use. To learn what major
device number to use for a particular device, check
/usr/src/sys/conf/majors.
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.
owner:group
The owner group operand pair is optional, however, if one is
specified, they both must be specified. The 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 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 oper-
and is used as a group name.
Major and minor device numbers can be given in any format acceptable to
strtoul(3), so that a leading `0x' indicates a hexadecimal number, and a
leading `0' will cause the number to be interpreted as octal.
The mknod utility can be used to recreate deleted device nodes under a
devfs(5) mount point by invoking it using dummy arguments. Example:
mknod cd0 c 0 0
where ``cd0'' is the name of the deleted device node.
COMPATIBILITY
The chown(8)-like functionality is specific to FreeBSD.
As of FreeBSD 4.0, block devices were deprecated in favour of character
devices. As of FreeBSD 5.0, device nodes are managed by the device file
system devfs(5), making the mknod utility superfluous.
SEE ALSO
SPONSORED LINKS
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