Richard Stallman <rms@gnu.org> writes:

>     >     5. Become a pipe for Emacs (which may or may not produce
>     >     any terminal output).
>     >
>     > These all seem useful in principle.  5 seems hard and I doubt
>     > it is worth implementing.
>
>     It would make it possible to configure an Emacsclient invocation
>     as a $PAGER command.
>
> Sorry, I do not follow.

Executables like "man" use a pager configurable in $PAGER for their
output.  Calling man in an Emacs shell session creates a lot of
garbage due to terminal problems.  It would be much nicer if one could
configure something into $PAGER which just sucked up its stdin and
made it available in a separate Emacs buffer in view mode.  In fact, I
_have_ something like that configured as a pager, namely the following
executable: