Re: tee: add --remove-cr option

[Nikos Papaspyrou]

On Wed, Feb 9, 2022 at 8:30 AM Bernhard Voelker
<mail@bernhard-voelker.de> wrote:
>
> On 2/9/22 04:27, Nikos Papaspyrou wrote:
> > Notice that the LOG file contains more than can be seen in the standard
> > output. Three lines were printed with progress information, each starting
> > with a carriage return character (0d). Only the last one remained and can
> > be seen in the standard output. This is frustrating if one needs to edit
> > or otherwise process the LOG file.
>
> What's wrong with
>   $ tr -d '\r' < LOG
> or
>   $ tr '\r' '\n' < LOG
> to show the output on the terminal later again?

If one settles to filter the LOG after it's saved, the intended behavior
is to remove these lines. So it would be something like:

$ cat LOG | sed 's/\r/@REMOVE\n/g' | sed '/@REMOVE$/d'

> > More specifically, lines ending with carriage return are sent to the
> > standard output but not to the files.
>
> -1
> IMO it's not tee(1)'s business to modify the content it is streaming.

This is a fair comment and in principle I can only agree. However, if the
intended behavior is to send something different to the LOG file from what
goes to the standard output, there's no easy way to obtain it unless sed
implements it.

-- 
Nikolaos Papaspyrou
Software Engineer
nikolaos@google.com

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