Why don't you just use SSH for that?
ssh localhost -f -S -L $localport:$proxy:$proxyport
and it does exactly
what your script is trying to do.
But I'm still confused if that is what you want to do,
as I see little use for it.
I was dreaming of guitarnotes that would irritate an executive kind of guy (FZ)
Update: The -S option of SSH makes sure it doesn't
try to connect, only functions as portmapper. Moreover,
I forgot the supply 'localhost', and the -f option is handy as well.
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