MKNOD(8) BSD System Manager's Manual MKNOD(8)
mknod - build special file
mknod [-m mode] name [b | c] major minor mknod [-m mode] name p
The mknod command creates device special files. Normally the shell script /dev/MAKEDEV is used to create special files for commonly known devices; it executes mknod with the appropriate arguments and can make all the files required for the device. The options are as follows: -m mode Set the file mode. mode may be absolute or symbolic, as described in chmod(1). In symbolic mode strings, the '+' and '-' operators are interpreted relative to an assumed initial mode of "a=rw". To make nodes manually, the arguments are: name Device or FIFO name. For example "sd" for a SCSI disk or a "pty" for pseudo-devices. FIFOs may be named arbitrarily by the user. b | c | p Type of device or FIFO. 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 dev- ices, such as terminal and pseudo devices, and are type c. A FIFO (also known as a named pipe) is type p. 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 the file /dev/MAKEDEV to see if the device is known. minor The minor device number tells the kernel which subunit the node corresponds to on the device; for example, a subunit may be a filesystem partition or a tty line. Major and minor device numbers can be given in any format accept- able to strtoul(3), so that a leading "0x" indicates a hexade- cimal number, and a leading "0" will cause the number to be in- terpreted as octal.
chmod(1), mkfifo(1), mkfifo(2), mknod(2), MAKEDEV(8)
A mknod command appeared in Version 6 AT&T UNIX. MirOS BSD #10-current November 22, 2009 1
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