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zero(4d)

Device Drivers & /dev files                                           zero(4D)



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 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 ALSO
       fork(2), mmap(2), sysconf(3C)



Oracle Solaris 11.4               3 Jul 1990                          zero(4D)
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