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Subject: bug#13028: inplace
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On Fri, 14 May 2004 15:53:04 +0600 (YEKST), Victor Porton offered his handy
"inplace" script to coreutils, which runs a filter on a file in-place. A
couple of replies said there was no need for this as one could do in-place
editing with perl or sed, but I think that was misguided, as the point of
inplace is that it works with any filter. I just used it with xml_grep:

inplace "xml_grep --exclude 'ul[@class=\"toc\"]' \"\$IN\" > \"\$OUT\""
"$book.xhtml"

I attach an updated version of inplace with some bashisms and typos fixed.

-- 
http://rrt.sc3d.org

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On=A0Fri, 14 May 2004 15:53:04 +0600 (YEKST), Victor Porton offered his han=
dy &quot;inplace&quot; script to coreutils, which runs a filter on a file i=
n-place. A couple of replies said there was no need for this as one could d=
o in-place editing with perl or sed, but I think that was misguided, as the=
 point of inplace is that it works with any filter. I just used it with xml=
_grep:<div>
<br></div><div><div>inplace &quot;xml_grep --exclude &#39;ul[@class=3D\&quo=
t;toc\&quot;]&#39; \&quot;\$IN\&quot; &gt; \&quot;\$OUT\&quot;&quot; &quot;=
$book.xhtml&quot;</div><div><br></div><div>I attach an updated version of i=
nplace with some bashisms and typos fixed.</div>
<div><br></div>-- <br><a href=3D"http://rrt.sc3d.org">http://rrt.sc3d.org</=
a><br>
</div>

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To: Reuben Thomas <rrt@HIDDEN>
Subject: bug#13028: Acknowledgement (inplace)
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Subject: bug#13028: inplace
Resent-From: Ruediger Meier <sweet_f_a@HIDDEN>
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On Thursday 29 November 2012, Reuben Thomas wrote:
> On Fri, 14 May 2004 15:53:04 +0600 (YEKST), Victor Porton offered his
> handy "inplace" script to coreutils, which runs a filter on a file
> in-place. A couple of replies said there was no need for this as one
> could do in-place editing with perl or sed, but I think that was
> misguided, as the point of inplace is that it works with any filter.
> I just used it with xml_grep:
>
> inplace "xml_grep --exclude 'ul[@class=\"toc\"]' \"\$IN\" >
> \"\$OUT\"" "$book.xhtml"
>
> I attach an updated version of inplace with some bashisms and typos
> fixed.

You may also have a look at sponge from moreutils project
http://linux.die.net/man/1/sponge
http://joeyh.name/code/moreutils/


cu,
Rudi

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Subject: bug#13028: inplace
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On 11/29/2012 03:20 PM, Reuben Thomas wrote:
> On Fri, 14 May 2004 15:53:04 +0600 (YEKST), Victor Porton offered his h=
andy "inplace" script to coreutils, which runs a filter on a file in-plac=
e. A couple of replies said there was no need for this as one could do in=
-place editing with perl or sed, but I think that was misguided, as the p=
oint of inplace is that it works with any filter. I just used it with xml=
_grep:
>
> inplace "xml_grep --exclude 'ul[@class=3D\"toc\"]' \"\$IN\" > \"\$OUT\"=
" "$book.xhtml"
>
> I attach an updated version of inplace with some bashisms and typos fix=
ed.
>

I definitely think this is worthwhile.
In fact I mostly finished such a script here
that would handle all the atomic, backup, permissions, etc.:
http://lists.gnu.org/archive/html/bug-coreutils/2010-03/msg00213.html
See also: http://www.pixelbeat.org/docs/unix_file_replacement.html

Where to put such a script is an issue.
We were thinking of a contrib/ folder for higher level
scripts like this that could leverage coreutils/
Translations in the shell script was one thing that was
I was wondering about, which I need to look at.

Also I was wondering what to call it. rp, inplace, replace, ...
and in the meantime I noticed David Wheeler proposed much the same thing
with the "rewrite" util:
http://permalink.gmane.org/gmane.comp.standards.posix.austin.general/5348

rewrite is my favorite name so far.

I'll work on this script after I finish a pending
SELinux patchset I'm working on.

thanks,
P=E1draig.

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On 11/29/2012 03:32 PM, Ruediger Meier wrote:
> On Thursday 29 November 2012, Reuben Thomas wrote:
>> On Fri, 14 May 2004 15:53:04 +0600 (YEKST), Victor Porton offered his
>> handy "inplace" script to coreutils, which runs a filter on a file
>> in-place. A couple of replies said there was no need for this as one
>> could do in-place editing with perl or sed, but I think that was
>> misguided, as the point of inplace is that it works with any filter.
>> I just used it with xml_grep:
>>
>> inplace "xml_grep --exclude 'ul[@class=3D\"toc\"]' \"\$IN\" >
>> \"\$OUT\"" "$book.xhtml"
>>
>> I attach an updated version of inplace with some bashisms and typos
>> fixed.
>
> You may also have a look at sponge from moreutils project
> http://linux.die.net/man/1/sponge
> http://joeyh.name/code/moreutils/

sponge is good, but doesn't quite cut it.
See point 6 at: http://www.pixelbeat.org/docs/unix_file_replacement.html

thanks,
P=C3=A1draig.

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--047d7b33cf6a6ce89c04cfa6ef3b
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On 29 November 2012 15:35, P=E1draig Brady <P@HIDDEN> wrote:

>
> I definitely think this is worthwhile.
>

Great!


> Where to put such a script is an issue.
> We were thinking of a contrib/ folder for higher level
> scripts like this that could leverage coreutils/
> Translations in the shell script was one thing that was
> I was wondering about, which I need to look at.
>

Is there a reason it can't be shipped so it'll install as part of coreutils=
?


> rewrite is my favorite name so far.
>

It sounds better, but I'd favour "inplace" as it's the term used by most
utilities, like Perl and sed, that already provide such a built-in
facility, and is hence more easily discovered.


> I'll work on this script after I finish a pending
> SELinux patchset I'm working on.


Great!

--=20
http://rrt.sc3d.org

--047d7b33cf6a6ce89c04cfa6ef3b
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On 29 November 2012 15:35, P=E1draig Brady <span dir=3D"ltr">&lt;<a href=3D=
"mailto:P@HIDDEN" target=3D"_blank">P@HIDDEN</a>&gt;</span>=
 wrote:<br><div class=3D"gmail_extra"><div class=3D"gmail_quote"><blockquot=
e class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc sol=
id;padding-left:1ex">
<br>
I definitely think this is worthwhile.<br></blockquote><div><br></div><div>=
Great!</div><div>=A0</div><blockquote class=3D"gmail_quote" style=3D"margin=
:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Where to put such =
a script is an issue.<br>

We were thinking of a contrib/ folder for higher level<br>
scripts like this that could leverage coreutils/<br>
Translations in the shell script was one thing that was<br>
I was wondering about, which I need to look at.<br></blockquote><div><br></=
div><div>Is there a reason it can&#39;t be shipped so it&#39;ll install as =
part of coreutils?</div><div>=A0</div><blockquote class=3D"gmail_quote" sty=
le=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
rewrite is my favorite name so far.<br></blockquote><div><br></div><div>It =
sounds better, but I&#39;d favour &quot;inplace&quot; as it&#39;s the term =
used by most utilities, like Perl and sed, that already provide such a buil=
t-in facility, and is hence more easily discovered.</div>
<div>=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;=
border-left:1px #ccc solid;padding-left:1ex">
I&#39;ll work on this script after I finish a pending<br>
SELinux patchset I&#39;m working on.</blockquote><div><br></div><div>Great!=
</div></div><div><br></div>-- <br><a href=3D"http://rrt.sc3d.org">http://rr=
t.sc3d.org</a><br>
</div>

--047d7b33cf6a6ce89c04cfa6ef3b--

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On 11/29/2012 07:03 PM, Reuben Thomas wrote:
> On 29 November 2012 15:35, P=E1draig Brady <P@HIDDEN> wrote:
>
>>
>> I definitely think this is worthwhile.
>>
>
> Great!
>
>
>> Where to put such a script is an issue.
>> We were thinking of a contrib/ folder for higher level
>> scripts like this that could leverage coreutils/
>> Translations in the shell script was one thing that was
>> I was wondering about, which I need to look at.
>>
>
> Is there a reason it can't be shipped so it'll install as part of coreu=
tils?

Well contrib/ in upstream to be installed in standard locations.

>> rewrite is my favorite name so far.
>>
>
> It sounds better, but I'd favour "inplace" as it's the term used by mos=
t
> utilities, like Perl and sed, that already provide such a built-in
> facility, and is hence more easily discovered.

Previous notes on naming:
http://lists.gnu.org/archive/html/bug-coreutils/2010-03/msg00238.html

"rewrite" is more descriptive as a verb as to what is actually happening.
We can finalize on the naming anyway when we have the implementation sort=
ed.

thanks,
P=E1draig.

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> On 11/29/2012 03:20 PM, Reuben Thomas wrote:
> > On Fri, 14 May 2004 15:53:04 +0600 (YEKST), Victor Porton offered his h=
andy "inplace" script to coreutils, which runs a filter on a file in-place.=
..

P=E1draig Brady <P@HIDDEN> said:
> I definitely think this is worthwhile.
> In fact I mostly finished such a script here
> that would handle all the atomic, backup, permissions, etc.:
> http://lists.gnu.org/archive/html/bug-coreutils/2010-03/msg00213.html
> See also: http://www.pixelbeat.org/docs/unix_file_replacement.html
...
> Also I was wondering what to call it. rp, inplace, replace, ...
> and in the meantime I noticed David Wheeler proposed much the same thing
> with the "rewrite" util:
> http://permalink.gmane.org/gmane.comp.standards.posix.austin.general/5348
...
> I'll work on this script after I finish a pending
> SELinux patchset I'm working on.

I'm delighted to hear that people are working this... thank you!

A request: Please make sure you include single-letter flags for key options=
; that'll help get it into the POSIX spec.  People are more likely to use t=
ools like these if their interface is "available everywhere", and I think g=
etting it (eventually) into the POSIX spec would help make that happen.

Also, please maximally steal useful syntax/examples/ideas from:
 http://permalink.gmane.org/gmane.comp.standards.posix.austin.general/5348
My hope is that this in-place edit tool will just "do the job well".

--- David A. Wheeler

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From: Reuben Thomas <rrt@HIDDEN>
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On 29 November 2012 at 19:16, P=C3=A1draig Brady <P@HIDDEN> wrote:

> On 11/29/2012 07:03 PM, Reuben Thomas wrote:
>
>> On 29 November 2012 15:35, P=C3=A1draig Brady <P@HIDDEN> wrote:
>>
>>
>>> I definitely think this is worthwhile.
>>>
>>>
>> Great!
>>
>>
>> Where to put such a script is an issue.
>>> We were thinking of a contrib/ folder for higher level
>>> scripts like this that could leverage coreutils/
>>> Translations in the shell script was one thing that was
>>> I was wondering about, which I need to look at.
>>>
>>>
>> Is there a reason it can't be shipped so it'll install as part of
>> coreutils?
>>
>
> Well contrib/ in upstream to be installed in standard locations.
>
> rewrite is my favorite name so far.
>>>
>>>
>> It sounds better, but I'd favour "inplace" as it's the term used by most
>> utilities, like Perl and sed, that already provide such a built-in
>> facility, and is hence more easily discovered.
>>
>
> Previous notes on naming:
> http://lists.gnu.org/archive/html/bug-coreutils/2010-03/msg00238.html
>
> "rewrite" is more descriptive as a verb as to what is actually happening.
> We can finalize on the naming anyway when we have the implementation
> sorted.
>

=E2=80=8BDid this get anywhere?

--=20
http://rrt.sc3d.org

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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-size:small">On =
29 November 2012 at 19:16, P=C3=A1draig Brady <span dir=3D"ltr">&lt;<a href=
=3D"mailto:P@HIDDEN" target=3D"_blank">P@HIDDEN</a>&gt;</sp=
an> wrote:<br></div><div class=3D"gmail_extra"><div class=3D"gmail_quote"><=
blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px=
 #ccc solid;padding-left:1ex"><span class=3D"">On 11/29/2012 07:03 PM, Reub=
en Thomas wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
On 29 November 2012 15:35, P=C3=A1draig Brady &lt;<a href=3D"mailto:P@draig=
brady.com" target=3D"_blank">P@HIDDEN</a>&gt; wrote:<br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
<br>
I definitely think this is worthwhile.<br>
<br>
</blockquote>
<br>
Great!<br>
<br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
Where to put such a script is an issue.<br>
We were thinking of a contrib/ folder for higher level<br>
scripts like this that could leverage coreutils/<br>
Translations in the shell script was one thing that was<br>
I was wondering about, which I need to look at.<br>
<br>
</blockquote>
<br>
Is there a reason it can&#39;t be shipped so it&#39;ll install as part of c=
oreutils?<br>
</blockquote>
<br></span>
Well contrib/ in upstream to be installed in standard locations.<span class=
=3D""><br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex"><blockquote class=3D"gmail_quote" style=3D"m=
argin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
rewrite is my favorite name so far.<br>
<br>
</blockquote>
<br>
It sounds better, but I&#39;d favour &quot;inplace&quot; as it&#39;s the te=
rm used by most<br>
utilities, like Perl and sed, that already provide such a built-in<br>
facility, and is hence more easily discovered.<br>
</blockquote>
<br></span>
Previous notes on naming:<br>
<a href=3D"http://lists.gnu.org/archive/html/bug-coreutils/2010-03/msg00238=
.html" rel=3D"noreferrer" target=3D"_blank">http://lists.gnu.org/archive/ht=
ml/bug-coreutils/2010-03/msg00238.html</a><br>
<br>
&quot;rewrite&quot; is more descriptive as a verb as to what is actually ha=
ppening.<br>
We can finalize on the naming anyway when we have the implementation sorted=
.<br></blockquote></div><div class=3D"gmail_extra"><br></div><div class=3D"=
gmail_default" style=3D"font-size:small">=E2=80=8BDid this get anywhere?</d=
iv><div><br></div>-- <br><div class=3D"gmail_signature"><a href=3D"http://r=
rt.sc3d.org" target=3D"_blank">http://rrt.sc3d.org</a></div>
</div></div>

--94eb2c043626fdcace0532f569d2--

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On 16/05/16 14:15, Reuben Thomas wrote:
> On 29 November 2012 at 19:16, Pádraig Brady <P@HIDDEN> wrote:
>
>> On 11/29/2012 07:03 PM, Reuben Thomas wrote:
>>
>>> On 29 November 2012 15:35, Pádraig Brady <P@HIDDEN> wrote:
>>>
>>>
>>>> I definitely think this is worthwhile.
>>>>
>>>>
>>> Great!
>>>
>>>
>>> Where to put such a script is an issue.
>>>> We were thinking of a contrib/ folder for higher level
>>>> scripts like this that could leverage coreutils/
>>>> Translations in the shell script was one thing that was
>>>> I was wondering about, which I need to look at.
>>>>
>>>>
>>> Is there a reason it can't be shipped so it'll install as part of
>>> coreutils?
>>>
>>
>> Well contrib/ in upstream to be installed in standard locations.
>>
>> rewrite is my favorite name so far.
>>>>
>>>>
>>> It sounds better, but I'd favour "inplace" as it's the term used by most
>>> utilities, like Perl and sed, that already provide such a built-in
>>> facility, and is hence more easily discovered.
>>>
>>
>> Previous notes on naming:
>> http://lists.gnu.org/archive/html/bug-coreutils/2010-03/msg00238.html
>>
>> "rewrite" is more descriptive as a verb as to what is actually happening.
>> We can finalize on the naming anyway when we have the implementation
>> sorted.
>>
>
> Did this get anywhere?

Nothing public unfortunately.

Pádraig

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On 16 May 2016 at 14:42, P=C3=A1draig Brady <P@HIDDEN> wrote:

> On 16/05/16 14:15, Reuben Thomas wrote:
>
>>
>> =E2=80=8BDid this get anywhere?
>>
>
> Nothing public unfortunately.


=E2=80=8BAre there difficulties one might be able to help with?

--=20
http://rrt.sc3d.org

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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-size:small">On =
16 May 2016 at 14:42, P=C3=A1draig Brady <span dir=3D"ltr">&lt;<a href=3D"m=
ailto:P@HIDDEN" target=3D"_blank">P@HIDDEN</a>&gt;</span> w=
rote:<br></div><div class=3D"gmail_extra"><div class=3D"gmail_quote"><block=
quote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc=
 solid;padding-left:1ex"><span class=3D"">On 16/05/16 14:15, Reuben Thomas =
wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex"><br>
=E2=80=8BDid this get anywhere?<br>
</blockquote>
<br></span>
Nothing public unfortunately.</blockquote><div><br></div><div><div class=3D=
"gmail_default" style=3D"font-size:small;display:inline">=E2=80=8BAre there=
 difficulties one might be able to help with?</div></div></div><div><br></d=
iv>-- <br><div class=3D"gmail_signature"><a href=3D"http://rrt.sc3d.org" ta=
rget=3D"_blank">http://rrt.sc3d.org</a></div>
</div></div>

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On 16/05/16 14:47, Reuben Thomas wrote:
> On 16 May 2016 at 14:42, Pádraig Brady <P@HIDDEN> wrote:
>
>> On 16/05/16 14:15, Reuben Thomas wrote:
>>
>>>
>>> Did this get anywhere?
>>>
>>
>> Nothing public unfortunately.
>
>
> Are there difficulties one might be able to help with?

I just don't have the time at present to complete this.

I did implement ACID file replacement using POSIX APIs a while ago in:
https://github.com/pixelb/crudini
The commit messages there have details on fsync()ing requirements etc.

Implementation in C in coreutils could also use other APIs where available
like renameat2(..., RENAME_EXCHANGE) and exchangedata() etc.
I noticed XFS_IOC_SWAPEXT but that's currently hardcoded
to support only same sized replacements (for defragment apps).
I was thinking of providing a wrapper for exchangedata() in gnulib,
which could be leveraged where available or falling back to
the current POSIX APIs.

thanks,
Pádraig

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On Mon, 16 May 2016 at 15:42, P=C3=A1draig Brady <P@HIDDEN> wrote:

>
> I just don't have the time at present to complete this.
>
> I did implement ACID file replacement using POSIX APIs a while ago in:
> https://github.com/pixelb/crudini
> The commit messages there have details on fsync()ing requirements etc.
>
> Implementation in C in coreutils could also use other APIs where availabl=
e
> like renameat2(..., RENAME_EXCHANGE) and exchangedata() etc.
> I noticed XFS_IOC_SWAPEXT but that's currently hardcoded
> to support only same sized replacements (for defragment apps).
> I was thinking of providing a wrapper for exchangedata() in gnulib,
> which could be leveraged where available or falling back to
> the current POSIX APIs.
>

Did you get any further? I was prompted to look up this thread by a
deprecation message for "tempfile" from Victor Porton's "inplace" script,
which I still use!

--=20
https://rrt.sc3d.org

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<div dir=3D"ltr"><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail=
_attr">On Mon, 16 May 2016 at 15:42, P=C3=A1draig Brady &lt;<a href=3D"mail=
to:P@HIDDEN">P@HIDDEN</a>&gt; wrote:<br></div><blockquote c=
lass=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px soli=
d rgb(204,204,204);padding-left:1ex"><br>
I just don&#39;t have the time at present to complete this.<br>
<br>
I did implement ACID file replacement using POSIX APIs a while ago in:<br>
<a href=3D"https://github.com/pixelb/crudini" rel=3D"noreferrer" target=3D"=
_blank">https://github.com/pixelb/crudini</a><br>
The commit messages there have details on fsync()ing requirements etc.<br>
<br>
Implementation in C in coreutils could also use other APIs where available<=
br>
like renameat2(..., RENAME_EXCHANGE) and exchangedata() etc.<br>
I noticed XFS_IOC_SWAPEXT but that&#39;s currently hardcoded<br>
to support only same sized replacements (for defragment apps).<br>
I was thinking of providing a wrapper for exchangedata() in gnulib,<br>
which could be leveraged where available or falling back to<br>
the current POSIX APIs.<br></blockquote><div><br></div><div style=3D"font-f=
amily:arial,helvetica,sans-serif;font-size:small" class=3D"gmail_default">D=
id you get any further? I was prompted to look up this thread by a deprecat=
ion message for &quot;tempfile&quot; from Victor Porton&#39;s &quot;inplace=
&quot; script, which I still use!<br></div></div><br>-- <br><div dir=3D"ltr=
" class=3D"gmail_signature"><div dir=3D"ltr"><div><div dir=3D"ltr"><a href=
=3D"https://rrt.sc3d.org" target=3D"_blank">https://rrt.sc3d.org</a></div><=
/div></div></div></div>

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On 12/09/2022 09:07, Reuben Thomas wrote:
> On Mon, 16 May 2016 at 15:42, Pádraig Brady <P@HIDDEN <mailto:P@HIDDEN>> wrote:
> 
> 
>     I just don't have the time at present to complete this.
> 
>     I did implement ACID file replacement using POSIX APIs a while ago in:
>     https://github.com/pixelb/crudini <https://github.com/pixelb/crudini>
>     The commit messages there have details on fsync()ing requirements etc.
> 
>     Implementation in C in coreutils could also use other APIs where available
>     like renameat2(..., RENAME_EXCHANGE) and exchangedata() etc.
>     I noticed XFS_IOC_SWAPEXT but that's currently hardcoded
>     to support only same sized replacements (for defragment apps).
>     I was thinking of providing a wrapper for exchangedata() in gnulib,
>     which could be leveraged where available or falling back to
>     the current POSIX APIs.
> 
> 
> Did you get any further? I was prompted to look up this thread by a deprecation message for "tempfile" from Victor Porton's "inplace" script, which I still use!

Not yet unfortunately

Last modified: Mon, 12 Sep 2022 12:00:02 UTC

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