Re: grep "--color=always" doesn't (always) work with "-i"

[Ottavio Caruso <ottavio2006-usenet2012%yahoo.com@localhost>]

On 22/10/2020 10:47, Ottavio Caruso wrote:
> Hi,
>
> $ uname -a
> NetBSD NetBSD 9.0_STABLE NetBSD 9.0_STABLE (GENERIC) #0: Sat May  9 
> 08:21:36 UTC 2020 
> mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/amd64/compile/GENERIC amd64
>
> My shell is ksh.
>
>
> /usr/bin/grep --color=always "DUID" -r /usr/share/man/man*
>
> correctly returns all manual page lines with "DUID" highlighted in red, 
> where as:
>
> grep -r -i duid /usr/share/man/man*
>
> returns all manual page lines with case insensitive "duid" but without 
> highlighting. I have tried to play around with the orders of parameters 
> and removing quotes, without success.
>
> As a term of comparison, the same command works as intended on OpenBSD 
> and Linux.
>
> Am I doing something wrong or is it a bug?

Forgot to add:

/usr/bin/grep --color=always "duid" -r /usr/share/man/man*

== colorizes, whereas:

/usr/bin/grep --color=always "DUID" -r /usr/share/man/man*

== doesn't colorize.

For the time being, I'll stick with the former syntax, but I'm baffled 
as to why the latter doesn't work.


--
Ottavio Caruso