From: Bart Schaefer <schaefer@brasslantern.com>
To: Ray Andrews <rayandrews@eastlink.ca>
Cc: Zsh Users <zsh-users@zsh.org>
Subject: Re: detect pipe
Date: Thu, 28 Jan 2021 12:58:07 -0800 [thread overview]
Message-ID: <CAH+w=7Yzj4CA6bjLcSm_4ciO0HWC4FqCw--tsJnP3fdDO40BvQ@mail.gmail.com> (raw)
In-Reply-To: <14ce37b2-35ca-6002-474a-7de5d6626a66@eastlink.ca>
On Thu, Jan 28, 2021 at 7:45 AM Ray Andrews <rayandrews@eastlink.ca> wrote:
>
> On 2021-01-28 7:05 a.m., Ray Andrews wrote:
>
> Delays of some sort are part of this almost for sure.
> Something changes in the OS I think.
Speaking of that, what OS are you using?
> #alias g='tabs -4; noglob _g'
That is guaranteed NOT to work. With that alias in place, your pipe
is feeding into the "tabs" command, and then the _g function is run
with the regular shell standard input in place. Aliases are
command-text-level replacements, so given the above,
% echo something | g other
is the same as
% echo something | tabs -4; _g other
which (in case not already obvious) is just like
% echo something | tabs -4
% _g other
The only way that would ever report stdin as a pipe would be if it
appeared in a compound command context, something like one of
% echo something | { g other }
% echo something | ( g other }
% echo something | if g other; then ... fi
etc.
next prev parent reply other threads:[~2021-01-28 20:58 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-27 16:45 Ray Andrews
2021-01-27 23:59 ` Bart Schaefer
2021-01-28 4:57 ` Ray Andrews
2021-01-28 6:16 ` Bart Schaefer
2021-01-28 10:08 ` Vincent Lefevre
2021-01-28 10:28 ` Vincent Lefevre
2021-01-28 15:05 ` Ray Andrews
2021-01-28 15:45 ` Ray Andrews
2021-01-28 20:58 ` Bart Schaefer [this message]
2021-01-28 20:59 ` Bart Schaefer
2021-01-29 1:17 ` Ray Andrews
2021-01-29 2:50 ` Bart Schaefer
2021-01-29 3:21 ` Ray Andrews
2021-01-30 0:29 ` Bart Schaefer
2021-01-30 14:26 ` Ray Andrews
2021-01-30 19:00 ` Bart Schaefer
2021-01-30 19:19 ` Ray Andrews
2021-01-31 19:12 ` Ray Andrews
2021-01-31 21:28 ` Bart Schaefer
2021-02-14 17:31 ` Vincent Lefevre
2021-02-14 19:33 ` Bart Schaefer
2021-02-14 20:33 ` Ray Andrews
2021-02-14 21:20 ` Bart Schaefer
2021-02-14 22:25 ` Ray Andrews
2021-02-14 21:24 ` Vincent Lefevre
2021-02-14 21:19 ` Vincent Lefevre
2021-02-14 21:24 ` Bart Schaefer
2021-02-14 21:38 ` Bart Schaefer
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