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zero(4d)

zero(4D)                  Device Drivers & /dev files                 zero(4D)

NAME
       zero - source of zeroes

SYNOPSIS
       /dev/zero

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), full(4D), null(4D)

Oracle Solaris 11.4               15 Mar 2024                         zero(4D)
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