DESCRIPTION
/dev/zero
is a zero special file.
Reads from a zero special file always return characters whose
value is '0' (\0 characters).
Data written on a zero special file is discarded or ignored.
Seeks on a zero special file will always succeed.
Private
mmap()
of a zero special file is allowed (see
mmap(2)).
Shared
mmap()
is not allowed.
EXAMPLES
In the following example, the buffer `buf' is filled with `len' \0 characters.
fildes = open("/dev/zero",...)
read(fildes, buf, len)
In the following example, the process now has a range of `len' \0
characters at memory location `address':
fildes = open("/dev/zero",...)
address = mmap(0, len, PROT_READ | PROT_WRITE, MAP_PRIVATE, fildes, any_offset)
Printable version
