Date: Tue, 26 Jan 2021 18:40:45 -0700 From: Alex Henrie <alexhenrie24@gmail.com> To: Bernhard Voelker <mail@bernhard-voelker.de> Cc: Otto Moerbeek <otto@drijf.net>, Coreutils <coreutils@gnu.org>, Alejandro Colomar <alx.manpages@gmail.com>, Fabrice BAUZAC <noon@mykolab.com>, Juli Mallett <juli@clockworksquid.com>, Jeffrey Walton <noloader@gmail.com>, freebsd-hackers@freebsd.org, William Ahern <william@25thandclement.com>, Roman Czyborra <roman@czyborra.com>, oshogbo@freebsd.org, tech@openbsd.org, Christian Groessler <chris@groessler.org>, linux-api@vger.kernel.org, Michael Kerrisk <mtk.manpages@gmail.com>, Ed Schouten <ed@nuxi.nl>, Eric Pruitt <eric.pruitt@gmail.com> Subject: Re: [PATCH v3 (resend)] tee: Add -q, --quiet, --silent option to not write to stdout Message-ID: <CAMMLpeRsvi%2BGjdn2ypikNrc0uW6K_dqOChasqYJ7Fv%2B_TMuC4g@mail.gmail.com> In-Reply-To: <d0f93c40-c471-7ef7-fa9a-2f467d775d3e@bernhard-voelker.de> References: <1f8ce444-35e2-56a7-dbd1-34e885372b11@gmail.com> <20210124121845.38293-1-alx.manpages@gmail.com> <YA2ztHUATu1gOxoV@clue.drijf.net> <CAMMLpeSLbWtRrrzOjB6DJgZCem8KWpy7_pWmr6ecuGrSmg4Eng@mail.gmail.com> <d0f93c40-c471-7ef7-fa9a-2f467d775d3e@bernhard-voelker.de>
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On Sun, Jan 24, 2021 at 9:04 PM Bernhard Voelker <mail@bernhard-voelker.de> wrote: > > An off-tech argument: ask a local plumber if he'd would ever use > a tee piece instead of a pipe end piece. I guess he would only > if he wouldn't have anything else at hand. According to POSIX, tee writes to "zero or more files."[1] So the "local plumber" analogy already doesn't hold, because a plumber would never put in a tee and then immediately cap it off so that the flow can only go to one place, but commands like `echo foo | tee | tee | tee` are already explicitly allowed. > A word to the proposed patch: what should happen, if the user does > not give a file? > A | B | tee -q > The patch just silently ignored that situation which feels wrong. Personally, I like the idea of only having to type `echo foo | tee -q` instead of `echo foo > /dev/null`, so I think the patch indeed does the right thing in that case. -Alex [1] https://pubs.opengroup.org/onlinepubs/9699919799/utilities/tee.html
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