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Re: Possible incorrect behaviour of AWK

From: Andrew J. Schorr
Subject: Re: Possible incorrect behaviour of AWK
Date: Tue, 17 Mar 2020 11:12:44 -0400
User-agent: Mutt/1.5.21 (2010-09-15)


On Tue, Mar 17, 2020 at 02:18:06PM -0000, Phil J FIsher wrote:
> $ LC_ALL=C awk --posix 'BEGIN {RS="^---$";ORS="\n\n"}  {print $0,RS,NR}'

I think the problem here may be the anchor metacharacters. From the docs:


     NOTE: Remember that in `awk', the `^' and `$' anchor
     metacharacters match the beginning and end of a _string_, and not
     the beginning and end of a _line_.  As a result, something like
     `RS = "^[[:upper:]]"' can only match at the beginning of a file.
     This is because `gawk' views the input file as one long string
     that happens to contain newline characters.  It is thus best to
     avoid anchor metacharacters in the value of `RS'.

When you say "$", do you actually mean "\n", for example?


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