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zero(7)								       zero(7)

NAME
       zero - /dev/zero special file

DESCRIPTION
       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 always succeed.

       When is memory mapped by calling the associated memory  object  behaves
       as  a object. It is initialized to all zeros. Writes to the object mod‐
       ify the contents of the object which are observed by  subsequent	 reads
       to this object.

       Both and are allowed.

       When it is mapped shared, the memory object can be shared only with the
       descendants of the current process. Modifications made  to  the	object
       are visible only to the process and its descendants.

       When  it	 is  mapped  private, any modifications done after are visible
       only to the process.

EXAMPLES
       In the following example, the buffer is filled with \0 characters.

       In the following example, the process now has a range of \0  characters
       at memory location

FILES
SEE ALSO
       mmap(2), null(7).

								       zero(7)

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