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Date: Mon, 23 May 2011 08:46:26 +1000
Subject: Re: English Idiom in Unix: Directory Recursively
From: Chris Angelico <rosuav@gmail.com>
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On Mon, May 23, 2011 at 6:22 AM, Xah Lee <xahlee@gmail.com> wrote:
> Xah wrote:
> =ABIn the emacs case: =93Recursive delete of xx? (y or n) =94, what could=
 it
> possibly mean by the word =93recursive=94 there? Like, it might delete th=
e
> directory but not delete all files in it?
> =BB
>
> Jonathan de Boyne Pollard wrote:
>> It might *try* to delete the directory but not any of its contents,
>> yes.
>
> you mean theoretically you see a possibility if the dir is implement
> as stilted as unix, but never in your life you find yourself might
> want to do it?

There's a difference between working with a directory itself and
working with files inside it. Generally, if you copy or delete a
directory, you will want to recurse. But if you want to, for instance,
wipe out all files whose names end with a tilde, then you might want
to recurse and you might not. So it makes sense to offer the user a
choice, and if recursive action is the only one that makes sense, at
least acknowledge that the operation might take an arbitrarily long
time. (Ever done a recursive operation on / on a large file system?
Takes just a little bit longer than a non-recursive one under the same
circumstances...)

Chris Angelico