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ZERO(4) FreeBSD Kernel Interfaces Manual ZERO(4)
NAME
zero - the zero device
DESCRIPTION
The zero device accepts and reads data as any ordinary (and willing)
file, but throws away any data written to it, and returns an endless
supply of null bytes when read.
FILES
/dev/zero
SEE ALSO
full(4), null(4)
HISTORY
A zero device appeared in 4.4BSD.
FreeBSD 14.0-RELEASE-p11 April 7, 1996 FreeBSD 14.0-RELEASE-p11