Re: grep(1) bug - duplicate output lines

On 9/27/23 21:40, Jamie Landeg-Jones wrote:
> When using color=always and a regex of '.' (for example), output lines
> are duplicated.
> 
> $ grep --version
> grep (BSD grep, GNU compatible) 2.6.0-FreeBSD
> 
> E.G.:
> 
> $ grep --color=always . /etc/fstab
> 
> Cheers, Jamie
> 

I think this is what we want:

https://people.freebsd.org/~kevans/grep-color.diff

Basically, for --color with . we actually get each individual character 
reported, and we can't really coalesce that. (Well, we could, but I'll 
leave that for future improvement). Once you hit 32 matches in the same 
line, we dump out the first set of matches then check again for any more
that just didn't fit the first time. Unfortunately, that logic wasn't 
prepared to avoid terminating the first time in case we have more 
matches to output, so we'd terminate, then refill our matches with the 
remainder of the line and output the leading context again + terminate 
again.

Thanks,

Kyle Evans