zero(7D) Devices zero(7D)NAMEzero - source of zeroes
DESCRIPTION
A zero special file is a source of zeroed unnamed memory.
Reads from a zero special file always return a buffer full of zeroes.
The file is of infinite length.
Writes to a zero special file are always successful, but the data writ‐
ten is ignored.
Mapping a zero special file creates a zero-initialized unnamed memory
object of a length equal to the length of the mapping and rounded up to
the nearest page size as returned by sysconf. Multiple processes can
share such a zero special file object provided a common ancestor mapped
the object MAP_SHARED.
FILES
/dev/zero
SEE ALSOfork(2), mmap(2), sysconf(3C)SunOS 5.11 3 Jul 1990 zero(7D)