Slightly different interpretation of $PATH between Bash and Perl

["Karr, David" <david dot karr at cacheflow dot com>]

I have a Bash script in $HOME/bin that runs "$(basename $0)" (essentially).
This works fine when I run it from Bash (1.3.2).

I also have a Perl script, run from Cygwin Perl, that uses the "system()"
command to run the same script.  This executes slightly differently from the
previous.

In particular, "$0" in the script, when run directly from Bash is
"/home/david.karr/bin/<scriptname>".  However, "$0" in the script, when I
run it from Cygwin Perl, is "c:\cygwin\home\david.karr\bin\<scriptname>".

My workaround for this is to always retrieve '$(cygpath -u $0}', but I'd
like to understand a little better why this is happening.

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