zero(7D) Devices zero(7D)
NAME
zero - 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 written 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 ALSO
fork(2), mmap(2), sysconf(3C)
SunOS 5.10 3 Jul 1990 zero(7D)
