Date: Sat, 12 May 2001 11:04:42 +0100 From: Brian Somers <brian@Awfulhak.org> To: Dima Dorfman <dima@unixfreak.org> Cc: hackers@FreeBSD.ORG, gad@FreeBSD.ORG, brian@Awfulhak.org Subject: Re: xargs(1) "replstr" patch Message-ID: <200105121004.f4CA4gX91830@hak.lan.Awfulhak.org> In-Reply-To: Message from Dima Dorfman <dima@unixfreak.org> of "Fri, 11 May 2001 18:03:19 PDT." <20010512010319.B3B893E0B@bazooka.unixfreak.org>
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I'd suggest going ahead and committing it ASAP - before people start
``discussing'' it again :oI
Feel free to blame me for reviewing it !!!
> Folks,
>
> The attached patch adds a "replacement string" feature to xargs(1).
> There's a full description in the man page update (also attached), but
> the following should demonstrate the new functionality:
>
> dima@spike% ./xargs -J [] echo CMD LINE [] ARGS < test
> CMD LINE this is the contents of the test file ARGS
> dima@spike% ./xargs -J [] echo CMD [] LINE ARGS < test
> CMD this is the contents of the test file LINE ARGS
> dima@spike% ./xargs -J [] echo [] CMD LINE ARGS < test
> this is the contents of the test file CMD LINE ARGS
>
> This is similar to, but not identical to, the -I option described in
> SUSv2. The latter allows the replstr ("[]" above) to be attached to
> other arguments, and appear multiple times. Furthermore, it implies
> '-n 1'. Although the features are similar, they can solve different
> problems; even if -I is implemented later, this (-J) would still be
> useful. -J also doesn't have the performance implications attached
> with -I.
>
> There was a nice, long thread about this on current a few weeks ago
> (topic: "Re: cp -d dir patch for review (or 'xargs'?)"). It was
> rather inconclusive, but nobody managed to come up with a way to
> *properly* and *easily* imitate this functionality. Writing a script
> to do this *properly* (i.e., handle environment growth) isn't as easy
> as it sounds (although it's possible, of course).
>
> The patch is a joint effort between myself and Garance Dorsihn (gad).
>
> Comments? Suggestions?
>
> Thanks in advance,
>
> Dima Dorfman
> dima@unixfreak.org
[.....]
--
Brian <brian@Awfulhak.org> <brian@[uk.]FreeBSD.org>
<http://www.Awfulhak.org>; <brian@[uk.]OpenBSD.org>
Don't _EVER_ lose your sense of humour !
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