Date: Sat, 12 May 2001 13:37:14 +0300 From: Peter Pentchev <roam@orbitel.bg> To: Brian Somers <brian@Awfulhak.org> Cc: Dima Dorfman <dima@unixfreak.org>, hackers@FreeBSD.ORG, gad@FreeBSD.ORG Subject: Re: xargs(1) "replstr" patch Message-ID: <20010512133714.A52713@ringworld.oblivion.bg> In-Reply-To: <200105121004.f4CA4gX91830@hak.lan.Awfulhak.org>; from brian@Awfulhak.org on Sat, May 12, 2001 at 11:04:42AM %2B0100 References: <dima@unixfreak.org> <200105121004.f4CA4gX91830@hak.lan.Awfulhak.org>
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Seconded :)
G'luck,
Peter
--
Do you think anybody has ever had *precisely this thought* before?
On Sat, May 12, 2001 at 11:04:42AM +0100, Brian Somers wrote:
> 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
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