bsd man page for null

NULL(4) 						     Kernel Interfaces Manual							   NULL(4)

NAME
       null - data sink

SYNOPSIS
       major device number(s):
	    raw: 1
       minor device encoding:
	    mem: 0;  kmem: 1;  null: 2

DESCRIPTION
       Data written on a null special file is discarded.

       Reads from a null special file always return 0 bytes.

FILES
       /dev/null
       /dev/MAKEDEV	   script to create special files
       /dev/MAKEDEV.local  script to localize special files

SEE ALSO
       mem(4)

3rd Berkeley Distribution					 January 28, 1988							   NULL(4)