NULL(4)                FreeBSD Kernel Interfaces Manual                NULL(4)

NAME
     null - the null device

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

FILES
     /dev/null

SEE ALSO
     full(4), zero(4)

HISTORY
     A null device appeared in Version 4 AT&T UNIX.

FreeBSD 13.1-RELEASE-p6         August 30, 2019        FreeBSD 13.1-RELEASE-p6