Re: strange interaction between read command and pipe to less from function

[Jim <linux.tech.guy@gmail.com>]

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Me again,

On Sun, Mar 26, 2023 at 10:49 AM Roman Perepelitsa <
roman.perepelitsa@gmail.com> wrote:

> On Sun, Mar 26, 2023 at 5:28 PM Jim <linux.tech.guy@gmail.com> wrote:
> >
> > cvt_256_colors_2_rgb_hex_fmt | less
>
> In this command both cvt_256_colors_2_rgb_hex_fmt and less are going
> to read and write to the same TTY. This won't do anything useful.
>
> Perhaps you don't realize that your `read` command reads and writes to
> the TTY? What do you expect from running it simultaneously with less?
>
> Roman.
>

Now I'm totally confused.  A bit by your answer and the word
'simultaneously'
as I thought the function would run first then less. That set aside I dug
back
into a previous function I was working on that used the same read statement.
And yet that function when piped through less, less worked as expected. Both
functions did 'basically' the same thing  with a somewhat different output.
The
one main difference was I had done a few checks before the read command
which included this:

  V=$(ps -o args= $(ps -o ppid= $$))

So I added it before the read.  Now 'less' responds as expected. I hope you
are not as confused as I am.  Especially as the command is run before the
read and not after. Also removed the sleep command.

????

Again thanks for your help,

Jim

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