Date: Mon, 7 Jul 2014 13:56:32 -0600 (MDT) From: Warren Block <wblock@wonkity.com> To: Arthur Chance <freebsd@qeng-ho.org> Cc: Ralf Mardorf <ralf.mardorf@rocketmail.com>, freebsd-questions@freebsd.org Subject: Re: [Bulk] Re: The name "grep" Message-ID: <alpine.BSF.2.11.1407071352370.87353@wonkity.com> In-Reply-To: <53BAD236.3060501@qeng-ho.org> References: <20140707075443.d47ca06a.freebsd@edvax.de> <53BA4F77.60907@qeng-ho.org> <20140707104403.5a0694ff.freebsd@edvax.de> <53BA71A7.9040208@qeng-ho.org> <1404728392.19389.1.camel@archlinux> <53BA9EC0.9000201@qeng-ho.org> <20140707160528.7ecf9855.freebsd@edvax.de> <1404750481.19389.12.camel@archlinux> <53BAD236.3060501@qeng-ho.org>
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On Mon, 7 Jul 2014, Arthur Chance wrote:
> On 07/07/2014 17:28, Ralf Mardorf wrote:
>>
>>> On Mon, 07 Jul 2014 14:21:04 +0100, Arthur Chance wrote:
>>>> dd [options] [ infile [ outfile ]]
>>
>> This way users by accident could mistake the infile with the outfile.
>>
>> We dislike to randomly screw up infile and outfile, so IMO it makes
>> sense to force if= and of= "operands".
>
> There's no problem about which file is input and which output with cp or mv,
> so why on earth would it be a problem with a sane version of dd?
>
> If you really need a hand holding indication of which file is which,
>
> dd -i $infile -o $outfile
>
> would be in the Unix spirit, unlike the existing form. And with an
> interactive shell you could use filename completion which fails with the
> existing dd.
There's an ongoing thread in the forums about csh completions. dd is
one of them:
complete dd 'c/if=/f/' 'c/of=/f/' \
'c/conv=*,/(ascii block ebcdic lcase pareven noerror notrunc osync sparse swab sync unblock)/,' \
'c/conv=/(ascii block ebcdic lcase pareven noerror notrunc osync sparse swab sync unblock)/,' \
'p/*/(bs cbs count files fillcahr ibs if iseek obs of oseek seek skip conv)/='
There is no reason a wrapper script could not be written for dd. It's
probably about twenty years too late to popularize a different format,
though.
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