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Message-ID: <bfdbce48-47d3-4d52-a359-dd962a319034@cs.ucla.edu>
Date: Sat, 25 Jan 2025 11:31:06 -0800
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Subject: Re: bug#75806: Trailing spaces; pattern "\s" before "[[:cntrl:]]"
 faulty
To: Andreas BROCKMANN <andreas DOT brockmann AT diehl DOT com>
Cc: "cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>, 75806-done AT debbugs DOT gnu DOT org
References: <ad4ae696207443f284d8700791d989ed AT diehl DOT com>
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On 2025-01-24 05:27, Andreas BROCKMANN via Bug reports for GNU grep wrote:
> The 1st command below correctly reports trailing spaces, for Unix and Windows format files.
> The 2nd one incorrectly reports all lines.
> 
>    grep -sHn -i " [[:cntrl:]]*$" *.vhd
>    grep -sHn -i "\s[[:cntrl:]]*$" *.vhd

I don't see a bug. The latter command is equivalent to:

    grep -Hins '[[:space:]][[:cntrl:]]*$' *.vhd

and if the input files use Microsoft CRLF format then [[:space:]] 
matches the CR at the end of every line and [[:cntrl:]]* matches the 
empty string after the CR.

Possibly you need to use Unix LF format, or use the --text option, or 
something like that.

Marking the bug as done.

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