4.4BSD/usr/share/man/cat4/null.0

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NULL(4)                     BSD Programmer's Manual                    NULL(4)

NNAAMMEE
     nnuullll - the null device

DDEESSCCRRIIPPTTIIOONN
     The nnuullll device accepts and reads data as any ordinary (and willing) file
     - but throws it away. The length of the nnuullll device is always zero.

FFIILLEESS
     /dev/null

HHIISSTTOORRYY
     A nnuullll device appeared in Version 7 AT&T UNIX.

4.4BSD                           June 5, 1993                                1