Date: Tue, 5 Dec 2017 07:53:48 -0800 From: Matt Joras <matt.joras@gmail.com> To: Devin Teske <devin@shxd.cx> Cc: Hans Petter Selasky <hps@selasky.org>, rgrimes@freebsd.org, cem@freebsd.org, Eitan Adler <eadler@freebsd.org>, src-committers <src-committers@freebsd.org>, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r326554 - in head: . usr.bin/sponge usr.bin/sponge/tests usr.bin/tee Message-ID: <CADdTf%2BhLaLUb=XF9jAqPOx7TgFXrWyf3PJywP-KsaDrvu3xs4w@mail.gmail.com> In-Reply-To: <CADdTf%2BiWp149DifcSA7K-6DzzOzyHpbsGDC2FNvnFGdoe0Yrfg@mail.gmail.com> References: <201712051258.vB5CwjQN051356@pdx.rh.CN85.dnsmgr.net> <22918eec-4c98-01e4-4c63-e145fbc6eab9@selasky.org> <AE022237-A2D5-49E1-A6DA-DD65A460B266@shxd.cx> <CADdTf%2Bh=Tqb635r7e8U8HdZQtwSdNtzcoC4hXuhRk7ir=TXviw@mail.gmail.com> <CADdTf%2BiWp149DifcSA7K-6DzzOzyHpbsGDC2FNvnFGdoe0Yrfg@mail.gmail.com>
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On Dec 5, 2017 7:35 AM, "Devin Teske" <devin@shxd.cx> wrote:
> On Dec 5, 2017, at 5:00 AM, Hans Petter Selasky <hps@selasky.org> wrote:
>
>> On 12/05/17 13:58, Rodney W. Grimes wrote:
>> Further more, why does freebsd need this in base?
>
> Hi,
>
> I think this is useful. It could replace the "-i " (intermediate) option
for "sed" for example. It avoids creating temporary files when filtering
files, right?
>
> --HPS
>
Wth is wrong with:
data=$( sed -e '...' somefile ) &&
echo "$data" > somefile
or
set -e
data=...
echo "$data" > ...
or
exec 3<<EOF
$( ... )
EOF
cat > ... <&3
or
(I digress)
Infinite variations, but the gist is that sponge looks to be trying to help
sh(1)/similar when help is unneeded.
Why buffer data into memory via fork-exec-pipe to sponge when you can
buffer to native namespace without pipe to sponge?
Am I missing something? Why do we need sponge(1)?
--
Devin
I do believe you are sort of missing the point. It is a utility that is
explicitly useful in shell pipelines, so when you want to do things as
one-liners. I like the utility and use the one from ports and my own
version in various things here and there. It is a common utility installed
in Linux distros and the top answer on Google for questions such as
"redirect shell output to same file". I think the outrage about adding a
tiny utility that's common elsewhere is a bit silly.
As for the implementation, I have my own version of sponge (hobby program
written in rust so not base-worthy), and it uses explicit temporary files
for larger outputs.
Matt
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