Is there a way to tell s_client to just "send a command" and quit?

Hey there folks.

I'm writing some certificate checks that call s_client to fetch my cert, 
but openssl s_client is blocking.  Is there an easy way to tell it "hang up 
as soon as negotiation settles?"

Perhaps with a "clean" command like "QUIT" or something (depending on the 
protocol being used).

This complicates scripting it with a simple shell script or something like 
that, and would be super useful.

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