osf1 man page for zero

Query: zero

OS: osf1

Section: 7

Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar

zero(7) 						 Miscellaneous Information Manual						   zero(7)

NAME
zero - source of zeroes
DESCRIPTION
This is a special file that provides a means of obtaining zeroes. A read from a zero special file returns a buffer full of zeroes. This file is of infinite length. Writes to a zero special file succeed at all times, but the data written is ignored. If you choose to map to a zero special file, a zero-initialized unnamed memory object is created that is of length equal to the mapping and rounded up to the nearest page size returned by the sysconf function. A zero special file object can be shared by several processes as long as a common ancestor has mapped the object as MAP_SHARED.
NOTES
Note that this version of the operating system does not support remapping of currently mapped pages.
FILES
/dev/zero
SEE ALSO
Functions: fork(2), mmap(2), sysconf(3). delim off zero(7)
Related Man Pages
mmap(2) - netbsd
madvise(3c) - sunos
madvise(3c) - php
madvise(3c) - ultrix
madvise(3c) - bsd
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