Re: Transform part of a message body

On 21/01/16 17:13, Dale R. Worley
wrote:

"@lbutlr" <[email protected]> writes:

Right, but what I want is to match any lien that contains nothing but
the same characters repeated x times. So I want to match

===============
------------------
qqqqqqqqqqqqqqqqqqqq
\\\\\\\\\\\\\\\
/////////////////////////////////
[[[[[[[[[[[[[[[[[[

Etc.

But not match -=-=-=-=-=-=-=-=

Gnu sed (and possibly other sed's) can use this regexp to find the
character sequences you want:

\(.\)\1{x,}

   Great Dale!  I didn't know that \n can be used in the right
side of

   the command. Thanks.  So, if egrep dosn't like it you can do:

sed -n '/^\(.\)\1\{14,\}$/p'

"\(.\)" matches any single (non-newline) character. "\1" matches
whatever the "\(.\)" matched (which will be one character). "\1{x,}",
where you replace "x" with a number, means x or more copies of whatever
the "\(.\)" matched.

You probably want to change "." to be more restrictive. You can write
"[^ ]" to specify that the character may not be a space, for instance.

Dale
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