FreeBSD Manual Pages
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 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) SunOS 5.10 3 Jul 1990 zero(7D)
NAME | DESCRIPTION | FILES | SEE ALSO
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