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- This driver is a System V adaptation of an equivalent driver for 4.2BSD.
- The original idea appeared in Version 8 Unix.
-
- When a process opens minor device N of this driver it get a file descriptor
- which is a duplicate of its own file descriptor N, as if a dup(2) call had
- been effected.
-
- This is most useful to make it possible to redirect to the standard input
- output and error streams programs that require a named file as operand. For
- example, something like
-
- cp /etc/passwd /dev/stdout | wc
-
- will work as intended (this particular example may not be very useful, but
- others are).
-
-