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From: Roman Perepelitsa <roman.perepelitsa@gmail.com>
To: Sebastian Gniazdowski <sgniazdowski@gmail.com>
Cc: Bart Schaefer <schaefer@brasslantern.com>,
	 Peter Stephenson <p.w.stephenson@ntlworld.com>,
	Zsh hackers list <zsh-workers@zsh.org>
Subject: Re: stdbuf -o0 -i0 via a Zsh native interface?
Date: Fri, 26 May 2023 11:30:27 +0200	[thread overview]
Message-ID: <CAN=4vMoONEB5saZMUutyy7jKM16EXT2k00nfrhxrU1BkzvFi5Q@mail.gmail.com> (raw)
In-Reply-To: <CAKc7PVCK0MFvGmgYxzKf3+_3iktOx-6ivbB98YyxK4mPTZkU+Q@mail.gmail.com>

On Fri, May 26, 2023 at 11:24 AM Sebastian Gniazdowski
<sgniazdowski@gmail.com> wrote:
>
> I've took a look, and it seems to be easy:
> 1. Export LD_PRELOAD=/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…

This won't work reliably. E.g., it may not work on binaries that are
linked against a different libc. A more reliable solution for your
problem is something like `unbuffer` from `expect`. This tool creates
a TTY and takes advantage of the convention that stdout to TTY is not
buffered. Better yet, you can do this with zpty without external
tools.

Roman.


  reply	other threads:[~2023-05-26  9:30 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-05-25 11:21 Sebastian Gniazdowski
2023-05-25 14:16 ` Peter Stephenson
2023-05-25 18:35   ` Bart Schaefer
2023-05-25 19:02     ` Sebastian Gniazdowski
2023-05-25 19:09       ` Bart Schaefer
2023-05-25 19:28         ` Sebastian Gniazdowski
2023-05-25 21:21           ` Bart Schaefer
2023-05-26  2:17             ` Sebastian Gniazdowski
2023-05-26 10:23               ` Sebastian Gniazdowski
2023-05-26  9:30                 ` Roman Perepelitsa [this message]
2023-05-26 20:52                   ` Bart Schaefer
2023-05-30 11:17     ` Peter Stephenson
2023-05-31 12:38       ` Sebastian Gniazdowski

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