Adaptec AHA-1520A Manual de servicio Pagina 416

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zero(7D) Devices SunOS 5.5
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 lengthof 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 com-
mon ancestor mapped the object MAP_SHARED.
FILES /dev/zero
SEE ALSO fork(2), mmap(2), sysconf(3C)
7D-412 modified 3 Jul 1990
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