null man page on Gentoo

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NULL(4)			   Linux Programmer's Manual		       NULL(4)

NAME
       null, zero - data sink

DESCRIPTION
       Data written to a null or zero special file is discarded.

       Reads  from  the	 null  special	file  always return end of file (i.e.,
       read(2) returns 0), whereas reads from zero always  return  bytes  con‐
       taining zero (\0 characters).

       null and zero are typically created by:

	      mknod -m 666 /dev/null c 1 3
	      mknod -m 666 /dev/zero c 1 5
	      chown root:root /dev/null /dev/zero

FILES
       /dev/null
       /dev/zero

NOTES
       If these devices are not writable and readable for all users, many pro‐
       grams will act strangely.

SEE ALSO
       chown(1), mknod(1), full(4)

COLOPHON
       This page is part of release 3.63 of the Linux  man-pages  project.   A
       description  of	the project, and information about reporting bugs, can
       be found at http://www.kernel.org/doc/man-pages/.

Linux				  2009-02-23			       NULL(4)
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