Date: Thu, 26 Apr 2007 03:17:08 -0700 From: Garrett Cooper <youshi10@u.washington.edu> To: FreeBSD Mailing List <freebsd-questions@freebsd.org> Subject: Re: first of misc questions.... Message-ID: <46307C24.6010908@u.washington.edu> In-Reply-To: <46304742.8060205@infracaninophile.co.uk> References: <20070425072914.GA65634@thought.org> <462F0824.5000107@infracaninophile.co.uk> <ed5f4bce0704251331v735ccedet947318e8d2a6fbe1@mail.gmail.com> <46304742.8060205@infracaninophile.co.uk>
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Matthew Seaman wrote:
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> Irsla wrote:
>> Hi,
>>
>> On 4/25/07, Matthew Seaman <m.seaman@infracaninophile.co.uk> wrote:
>>> find . -type f \( -mtime 6 -o -mtime 29 \) -print0 | xargs -0 vi
>>>
>> what about the -exec option of find ? I always wonder why people don't
>> use it.
>>
>> find . -type f \( -mtime 6 -o -mtime 29 \) -exec vi {} \;
>>
>
> The critical difference is that 'find | xargs foo' runs foo once[*],
> to process all the files in one go. 'find -exec foo {}' runs foo one
> time for each matched file. In this case, it's probably not a big
> deal, but when you need to process hundreds of files 'find | xargs
> foo' is much more efficient.
>
> Cheers,
>
> Matthew
>
> [*] Actually, it runs foo repeatedly with as many filenames on the
> foo command line as it can each time. That's generally several
> hundred files at a go.
>
> - --
> Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard
> Flat 3
> PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate
> Kent, CT11 9PW
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Doesn't -xargs prebuffer input via xargs, where -exec does exec on the fly?
-Garrett
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