The UID and GID are kept in the standard Perl variables $</$> and $(/$). You can then discover the username via getpwuid: 
print "Your username is: ", getpwuid($<) || "unknown???", "\n";

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This allows you to get this information without ever needing to spawn an external process.

In reply to Re: Re: whoami? by Fastolfe
in thread whoami? by Anonymous Monk

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