This is a duplicate of the Q&A item More than one way to do it???. My response (Re: More than one way to do it???) was this:

You can use the ttyname() function in POSIX to get this: 

use POSIX 'ttyname';

$tty = ttyname(0);

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In reply to Re: More than one way to do it??? by Fastolfe
in thread More than one way to do it??? by Anonymous Monk

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