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 zero(7)                                                             zero(7)

 NAME    [Toc]    [Back]
      zero - zero file

 DESCRIPTION    [Toc]    [Back]
      /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    [Toc]    [Back]
      In the following example, the buffer `buf' is filled with `len' \0

      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)

 FILES    [Toc]    [Back]

 SEE ALSO    [Toc]    [Back]
      mmap(2), null(7).

 Hewlett-Packard Company            - 1 -   HP-UX 11i Version 2: August 2003
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