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28 .\" @(#)mknod.8 8.2 (Berkeley) 12/11/93
36 .Nd build special file
42 .Op Ar owner : Ns Ar group
47 utility is deprecated on modern
54 utility creates device special files.
55 To make nodes manually, the four required arguments are:
57 .Bl -tag -width indent
59 Device name, for example
61 for a SCSI disk on an HP300 or a
67 device is a block type device such as a tape or disk drive which needs
68 both cooked and raw special files,
71 All other devices are character type devices, such as terminal
72 and pseudo devices, and are type
75 The major device number is an integer number which tells the kernel
76 which device driver entry point to use.
78 major device number to use for a particular device, check
79 .Pa /usr/src/sys/conf/majors .
81 The minor device number tells the kernel which subunit
82 the node corresponds to on the device; for example,
83 a subunit may be a file system partition
85 .It Ar owner : Ns Ar group
89 operand pair is optional, however, if one is specified, they both must be
93 may be either a numeric user ID or a user name.
94 If a user name is also a numeric user ID, the operand is used as a
98 may be either a numeric group ID or a group name.
99 Similar to the user name,
100 if a group name is also a numeric group ID, the operand is used as a
104 Major and minor device numbers can be given in any format acceptable to
108 indicates a hexadecimal number, and a leading
110 will cause the number to be interpreted as octal.
114 utility can be used to recreate deleted device nodes under a
116 mount point by invoking it using dummy arguments.
119 .Dl "mknod cd0 c 0 0"
123 is the name of the deleted device node.
127 like functionality is specific to
132 block devices were deprecated in favour of character
136 device nodes are managed by the device file system
143 device nodes may be created in regular file systems but such
144 nodes cannot be used to access devices.