Re: request for review: Doing direct file I/O in Emacs Lisp

[Kai Grossjohann]

Richard Stallman <address@hidden> writes:

>     > When eshell sees a redirect from a builtin, I think it would be most
>     > efficient to produce the output in a buffer and write it with
>     > write-region into the file.
>
>     What about "ls foo | grep bla"?  Then the output isn't a file.
>
> Then you could put the ls output in a buffer and feed it to grep.
> That would work fine.

But then, you would have to wait until ls is finished.  It would be
very useful to be able to see partial results while the command is
running.  (In this particular case, it is unlikely that the builtin
takes a lot of time, but it is only an example.)

Kai