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Fri, 26 May 2023 02:23:46 -0700 (PDT) MIME-Version: 1.0 References: <1297534493.4668003.1685024167868@mail.virginmedia.com> In-Reply-To: From: Sebastian Gniazdowski Date: Fri, 26 May 2023 10:23:35 +0000 Message-ID: Subject: Re: stdbuf -o0 -i0 via a Zsh native interface? To: Bart Schaefer Cc: Peter Stephenson , Zsh hackers list Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Seq: 51796 Archived-At: X-Loop: zsh-workers@zsh.org Errors-To: zsh-workers-owner@zsh.org Precedence: list Precedence: bulk Sender: zsh-workers-request@zsh.org X-no-archive: yes List-Id: List-Help: , List-Subscribe: , List-Unsubscribe: , List-Post: List-Owner: List-Archive: I've took a look, and it seems to be easy: 1. Export LD_PRELOAD=3D/usr/lib/zsh/5.7/libzstdbuf.so - https://github.com/coreutils/coreutils/blob/master/src/stdbuf.c#L196 - https://github.com/coreutils/coreutils/blob/master/src/stdbuf.c#L259 2. Provide stdbuf function in libzstdbuf.so: - https://github.com/coreutils/coreutils/blob/master/src/libstdbuf.c#L139 Seems fairly simple=E2=80=A6 On Fri, 26 May 2023 at 02:17, Sebastian Gniazdowski wrote: > > On Thu, 25 May 2023 at 21:21, Bart Schaefer w= rote: > > > > Use with great caution, but to test the concept: > > > > TRAPDEBUG() { setopt err_exit; stdbuf -o0 -i0 ${(z)ZSH_DEBUG_CMD} } > > Interesting, I've never touched debug trap, this gives me a glimpse of > how it is working. > > And as for the topic in general, I've had a moment of understanding > that what's needed is basically: a `stdbuf` command that's *built-in*, > and this comes down to your idea of `STTY=3D=E2=80=A6 my-cmd` -like > inline-export variable, which is a nicer, more integrated version of a > stdbuf-clone builtin (and could be made non-only-inline-export, to set > once and forget). Now, who has time to look at stdbuf.c? :) To grasp > what the LD-trick used there is? > > -- > Best regards, > Sebastian Gniazdowski --=20 Best regards, Sebastian Gniazdowski